US20110253373A1 - Transport and analysis device for use in a borehole - Google Patents
Transport and analysis device for use in a borehole Download PDFInfo
- Publication number
- US20110253373A1 US20110253373A1 US13/083,839 US201113083839A US2011253373A1 US 20110253373 A1 US20110253373 A1 US 20110253373A1 US 201113083839 A US201113083839 A US 201113083839A US 2011253373 A1 US2011253373 A1 US 2011253373A1
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- United States
- Prior art keywords
- fluid
- wellbore
- payload
- interior
- transport
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
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- 239000000463 material Substances 0.000 claims description 53
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Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B27/00—Containers for collecting or depositing substances in boreholes or wells, e.g. bailers, baskets or buckets for collecting mud or sand; Drill bits with means for collecting substances, e.g. valve drill bits
- E21B27/02—Dump bailers, i.e. containers for depositing substances, e.g. cement or acids
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
- E21B23/08—Introducing or running tools by fluid pressure, e.g. through-the-flow-line tool systems
- E21B23/10—Tools specially adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells
- E21B49/084—Obtaining fluid samples or testing fluids, in boreholes or wells with means for conveying samples through pipe to surface
Definitions
- This disclosure is directed to devices and methods for transporting materials or devices in a borehole.
- Hydrocarbons such as oil and gas
- Hydrocarbon-bearing formations are usually referred to as the producing zones or oil and gas reservoirs or “reservoirs.”
- wellbores or boreholes are drilled from a surface location or “well site” on land or offshore into one or more such reservoirs.
- a wellbore is usually formed by drilling a borehole of a desired diameter or size by a drill bit conveyed from a rig at the well site.
- the drill string includes a hollow tubing attached to a drilling assembly at its bottom end.
- the drilling assembly includes the drill bit for drilling the wellbore.
- the tubing usually made by joining relatively small sections of rigid metallic pipe or a continuous tubing.
- drilling fluid is supplied from the surface through the drilling tubing.
- the drilling fluid passes through the drilling assembly, and discharges at the drill bit bottom.
- the drilling fluid discharged at the drill bit bottom returns to the surface via an annulus between the drill string and the wellbore.
- a payload e.g., a material or device
- the present disclosure provides a method for transporting a material in a borehole.
- the method may include activating a fluid conveyable device in a wellbore to convey a payload between an interior and an exterior of the fluid conveyable device.
- the present disclosure also provides an apparatus for transporting a material in a wellbore.
- the apparatus may include a fluid conveyable device having an interior space for receiving the payload and a access control member for conveying the payload between the interior and the exterior of the fluid conveyable device.
- FIG. 1 illustrates a transport device made in accordance with one embodiment of the present disclosure
- FIGS. 2A-B schematically illustrate a transport device that uses a biasing activator in accordance with one embodiment of the present disclosure
- FIGS. 3A-B schematically illustrate a transport device that uses a piston-based activator in accordance with one embodiment of the present disclosure
- FIG. 4A schematically illustrates a transport device that uses a permeable membrane in accordance with one embodiment of the present disclosure
- FIG. 4B schematically illustrates a transport device that uses a shape memory material in the activating mechanism in accordance with one embodiment of the present disclosure
- FIG. 5 illustrates transport devices made in accordance with one embodiment of the present disclosure used during drilling.
- FIG. 6 illustrates transport devices made in accordance with one embodiment of the present disclosure used during post-drilling activities.
- the present disclosure relates to methods and devices for sampling a downhole material and/or delivering a material or device to a downhole location.
- the material may be an engineered fluid introduced from the surface, such as a drilling fluid, or a naturally occurring fluid such as a hydrocarbon.
- the material may also include solids.
- the transport device may be formed as a capsule, receptacle or other such enclosure that selectively obtains a sample of a downhole fluid or other material and return that sample to the surface.
- the transport device may be an autonomous or semi-autonomous device that is adapted to be moved by a fluid flowing along the wellbore.
- Illustrative devices according to the present disclosure may be of relatively small size; e.g., a nanometers to a few centimeters in outer dimensions.
- exemplary devices may be configured to initiate the sampling activity based on a particular activation criteria (e.g., pressure, temperature, time, depth, fluid composition, etc.). When activated, the device captures a predetermined amount of a fluid and/or other material, the payload, and then seals the sample within the device.
- the transport device may include one or more sensors to measure ambient wellbore conditions, fluid composition, depth, temperature, pressure, etc. The transport device may flow to the surface where it is recovered and the retrieved sample may be analyzed.
- the device may include a receptacle or shell 12 that includes an interior space 14 for receiving a sample of a downhole material or delivering a material or device in the wellbore.
- a payload For simplicity, the sampled material or delivered material/device will be collectively referred to as a payload.
- the terms enclosure, receptacle, shell and capsule may be used interchangeably herein and do not imply any functionality beyond a structure configured to store a payload.
- the shell 12 may be formed of a material such as metals or composites that exhibit sufficient material properties (e.g., toughness, compressive strength, etc.) to withstand the abrasions, pressures and dynamic stresses associated with the harsh wellbore environment. Additionally, the material should be sufficiently chemically inert relative to the corrosive wellbore environment. Moreover, the shell 12 should be sufficiently strong (e.g., tensile strength) to withstand the pressure applied by the material inside the shell 12 as that material expands.
- the sample may include a fluid (e.g., a liquid or gas), a solid, or semi-solid, or combinations thereof. As noted previously, the fluid may be a fluid introduced from the surface and/or an in situ fluid.
- the shell 12 may be configured as a free-standing device that can traverse a wellbore without being fixed or otherwise connected to a conveyance device or carrier such as a tubing, wireline, slickline, or drill string.
- the enclosure e.g., shell or capsule
- the enclosure need not be configured to traverse the wellbore in both directions (e.g., uphole and downhole) independently.
- the enclosure may be conveyed to a downhole location and then released to independently return to the surface.
- the shell 12 may be tethered to a rigid or non-rigid conveyance member.
- Illustrative conveyance members include, but are not limited to, wires, optical fibers, umbilicals, capillary tubes, etc.
- the conveyance member may have a size small enough to fit in a bore of a tubular or an annulus between two tubulars.
- the weight of the conveyance member may be selected such that the conveyance member and the transport device 10 may flow with a fluid; e.g., the conveyance member may be neutrally buoyant.
- the enclosure may be released to independently traverse the wellbore to a downhole location and then retrieved by a carrier.
- the fluid may be the prime mover that transports the enclosure and/or the media through which the enclosure floats or sinks.
- carrier-free in one aspect, means substantially unconnected to a rigid or non-rigid carrier for the purposes of travelling through a wellbore.
- the shell 12 may be shaped to flow with or pass through wellbore fluids. While a spherical shape is shown, other shapes, both symmetric and asymmetric, may be used.
- the chamber 14 may be configured to be fluid-tight, e.g., liquid tight or gas-tight.
- An access control member 16 allows selective communication between the interior space 14 and the wellbore environment.
- the transport device 10 may include an instrument package 18 in the interior space 14 .
- the instrument package 18 may include one or more sensors 20 , an analysis tool 22 , an activator 24 , a communication device 25 , and a power supply 26 .
- some embodiments may include one more sensors 28 for measuring a parameter of interest external to the device 10 .
- the sensors 20 , 28 may provide estimates of any number of parameters related to the interior space 14 and the materials therein or the conditions outside of the device 10 .
- the data generated by any component of the instrument package 18 may be stored as either material characteristics change or in solid state memory.
- the communication device 25 may provide unidirectional or bi-direction communication between the device 10 and the surface and/or subsurface equipment.
- the power supply 26 may be a power storage device, a downhole power generator, a chargeable induction type of device, or other suitable device for storing, receiving, and/or generating power. While a number of components have been shown for the instrument package 18 , it should b understood than less than all may be used for any given application.
- the device 10 may also include propulsion or steering devices that direct the device 10 to a desired location.
- the analysis tool 22 may be configured to estimate one or more parameters relating to the sample.
- the analysis may include sensors for estimating any number of desired parameters of the sampled material.
- Illustrative sensors include, but are not limited to, optical sensors, molecularly impregnated polymers, etc. These sensors may provide information as to fluid composition (e.g., the presence of emulsifiers, surfactants, or fluid loss materials), quantification of trace amounts of gases such as H2S, or trace amounts of metals, such as mercury, nickel or vanadium in either crude oil or formation brines, etc.
- the analysis tool 22 may include an information processor, a data storage medium, processor memory.
- Data storage medium may be any standard computer data storage device, hard disk, removable RAM, EPROMs, EAROMs, flash memories, etc.
- Data storage medium stores a program that when executed causes information processor to execute the disclosed method.
- Information processor may be any form of computer or mathematical processing hardware.
- the access control member 16 may include a valve element 30 that allows selective payload delivery between the exterior of the device 10 and the interior space 14 .
- the valve element 30 may be directly responsive to an environmental stimulus.
- the valve element 30 may be configured to permit flow into the chamber 14 only after a predetermined pressure differential exists between the chamber 14 and the exterior of the device. Thus, such a device may be considered to be pressure activated.
- the valve element 30 may include a heat meltable plug element 32 that melts at a pre-determined temperature. Once melted, valve element 30 may admit fluid into the chamber 14 .
- the valve element 30 may in embodiments be a uni-directional valve that only allows fluid to enter but not leave the chamber 14 . Thus, such a device may be considered to be temperature activated.
- the plug element 32 may dissolve or disintegrate when exposed to a selected stimulus (e.g., a chemical, EM energy, etc.).
- the valve element 30 may be responsive to an activation signal.
- the activator 24 may include a timer that is programmed with a pre-determined time delay. Once the time delay has expired, the activator 24 may transmit a signal (e.g., an electrical signal) to the access control member 16 . In response to the signal, the access control member 16 may open to allow fluid flow into the chamber 14 . Such a device may be considered to be time activated.
- the activator 24 may receive data from the sensor 28 relating to a selected parameter or parameters (e.g., pressure, temperature, fluid composition, etc.). The activator 24 may transmit the activation signal to the valve element 30 upon detecting a specified value or values for the selected parameter(s).
- the valve element 30 may be activated by an external signal from the surface and/or a downhole location. For instance, the valve element 30 may be a solenoid-type valve activated by an electromagnetic signal.
- transport devices according to the present disclosure may be susceptible to numerous embodiments. Some non-limiting embodiments are described in connection with FIGS. 2-5 below.
- FIGS. 2A and B there is shown an embodiment of transport device 10 made in accordance with the present disclosure that includes a shell 40 that defines an interior space 42 for receiving a sample of a downhole material.
- the shell 40 may be formed of any material previously discussed.
- the shell 40 includes a first section 44 and a second section 46 that separate to communication between the interior space 42 and the wellbore environment. Numerous devices may be used to open and close the sections 44 , 46 .
- a biasing member 48 may be used to separate the sections 44 , 46 .
- the biasing member 48 may be configured to apply a biasing force that tends to at least partially open the sections 44 , 46 .
- the biasing member 48 may be a spring, compressed gas, or other device configured to apply a displacing force. As shown in FIG. 2B , a suitable actuator 50 may be used to release this biasing force to open the sections 44 , 46 to form a gap or opening 52 through which surrounding fluid may enter the interior space 42 . It should be appreciated that the sections 44 , 46 need not completely separate. For example, the sections 44 , 46 may be coupled by a hinge (not shown). This embodiment may include an instrument package, such as instrument package 18 ( FIG. 1 ), in the interior space 42 as previously discussed.
- embodiments such as the FIG. 1 embodiment, may be used as a delivery device. That is, one or more materials or devices may be formed as a payload within the space 42 .
- the shell 40 may be opened at a selected location in the wellbore to deliver the payload.
- the payload may be a material (e.g., a chemical agent or additive) or a device configured to perform a downhole task.
- the type of actuator used may depend, in part, on the size of the transport device.
- transport devices that may be in the centimeter range for size may use biasing elements as discussed above.
- micro-machined devices elastomers, molecularly impregnated polymers, piezoelectric elements, magnetostrictive elements, shape memory alloys, magnetic elements, or other suitable devices may be used to selective admit fluid into the interior of the transport device.
- semi-conductor type processes may be used to form miniature sensors that may be incorporated into the shell.
- batch type manufacturing processes may be used to embed nano-sensors in the device 10 .
- the device 10 may use a porous/permeable material that is at least partially filled with a displaceable material.
- the porous material may be a sponge-like material that includes a meltable material such as wax, or some other dissolvable material.
- a given stimulus e.g., pressure or temperature
- the porous/permeable material releases the meltable material.
- the released material may function as an activator to initiate sampling, may perform some analysis (e.g., by interacting with a sampled material), and/or some other function.
- FIGS. 3A and B there is shown an embodiment of transport device 10 made in accordance with the present disclosure that includes a shell 60 that defines an interior space 62 for receiving a sample of a downhole material.
- the shell 60 may be formed of any material previously discussed.
- the shell 60 includes a exterior shell section 64 and an interior shell section 66 that can rotate relative to one another.
- Each section 64 , 66 includes ports or openings 68 a, b , respectively.
- the ports 68 a, b are misaligned.
- FIG. 3B the ports 68 a,b are aligned. Numerous devices may be used rotate the sections 64 and 66 relative to one another.
- an actuator 70 for generating such rotation may include a piston 72 fixed to the exterior shell section 64 and a cylinder 74 fixed to the interior shell section 68 .
- the piston 72 and cylinder 74 may have mating threads formed to cause the cylinder 74 to rotate as the piston 73 translates axially.
- the piston may be actuated by pressure in a chamber 76 .
- the piston may be displaced from an initial position by a predetermined wellbore pressure in the chamber 76 .
- a biasing member (not shown) may resist movement of the piston until the predetermined wellbore pressure is present and may further urge the piston 72 back to the initial position after the predetermined pressure is no longer present.
- a motor may be used to generate rotational power for rotating the shells 64 , 66 .
- the device may include a selectively permeable shell 80 that includes an interior space 82 for receiving a sample of a downhole material.
- the shell 80 may be formed partially or wholly of a membrane or material configured to allow only one or more selected material, e.g., solids, liquids, gases, or mixtures thereof, to flow into the interior space 82 .
- the transport device 10 may include a permeable material in the interior space 82 .
- the material that passes through the shell 80 may be stored in the pores or interior spaces of the permeable material 84 .
- an instrument package e.g., package 18 ( FIG. 1 ), may be positioned in the interior space 82 .
- a transport device 10 may only include a space for receiving a sample.
- the Figures depict the transport device 10 as spherical. Other shapes, such as “egg” shapes, colloids, tubulars, cubes, may also be used.
- the device 10 may include a selectively permeable shell 90 that includes an interior space 92 for receiving a sample of a downhole material or a payload from the surface.
- the shell 90 may be formed in any manner previously described.
- the device 10 may include an activator 94 having a pin 95 that co-acts with a catch 96 .
- a shank 97 of the pin 95 includes a first head 98 A and a second head 98 B.
- the catch 96 may be a clamp-type device that is at least partially formed of a “smart material,” e.g., shape memory alloy, that is responsive to an applied stimulus such as heat or electromagnetic signal.
- an applied activation signal causes the shape memory material of the catch 96 opens to a diameter that allows passage of the first head 98 A.
- the catch 96 may thereafter shrink or may engage the second head 98 B.
- external pressure and/or an internal biasing force may be used to close the device.
- the catch 96 may be reactivated to allow the first head 98 A to translate through the catch 96 to close the device.
- the buoyancy of the device 10 may be controlled.
- the device 10 may be formed to be neutrally buoyant, positively buoyant, or negatively buoyant.
- the buoyancy may be adjustable or variable.
- the device 10 when introduced into the well, the device 10 may be negatively buoyant to assist in sinking into the wellbore. Thereafter, the device 10 may become neutrally buoyant or positively buoyant to assist in rising to the surface.
- ballast (not shown) may be affixed to the interior or exterior of the device 10 . This ballast may be released from the device 10 at a selected time or may be calibrated to dissolve or otherwise disengage from the device 10 .
- the transport devices 10 are shown deployed during drilling of a wellbore 100 .
- the wellbore 100 is drilled by a drill string 102 from a surface location 104 .
- a casing 106 is placed at an upper section of the wellbore 100 to prevent collapsing of the wellbore 100 .
- the drilling string 102 includes a tubing 108 , which may be a drill pipe made from joining smaller sections of rigid pipe or a coiled tubing, and a drilling assembly 110 attached to the bottom end 112 of the tubing 108 .
- the drilling assembly 110 carries a drill bit 114 , which is rotated to disintegrate the rock formation. Any suitable drilling assembly may be utilized for the purpose of this disclosure.
- drilling fluid 115 from a source 116 is supplied under pressure to the tubing 108 .
- This drilling fluid 115 exits at the drill bit 114 and returns to the surface via an annulus 118 between the tubing 108 and a wellbore wall 120 .
- the transport devices 10 may be programmed, calibrated or otherwise configured to activate upon the detection of a given condition or event, e.g., pressure, temperature, time, activation signal, etc.
- a given condition or event e.g., pressure, temperature, time, activation signal, etc.
- one or more transport devices 10 are released into the tubing 108 using the source 116 or other suitable equipment.
- the transport devices 10 travel with the fluid 114 down to the drilling assembly 110 .
- the transport devices 10 self-actuate and sample a surrounding fluid.
- a coded signal may also be transmitted to activate the transport devices 10 .
- the fluid may be captured in the transport device 10 .
- the fluid can also be analyzed and the results of the analysis may be stored as material characteristics change, in a solid state memory, or other suitable data storage device.
- the sampling may occur in the tubing 108 and/or in the annulus 118 .
- the transport devices 10 return to the surface 104 and may be recovered at a suitable recovery unit 122 .
- the payload, i.e., the material samples and/or information, contained in the returning transport devices 10 may be retrieved, interpreted and used as appropriate.
- the transport devices 10 may be programmed, calibrated or otherwise configured to activate upon the detection of a given condition or event, e.g., pressure, temperature, time, activation signal, etc.
- a material and/or device is inserted into one or more transport devices 10 that are released into the tubing 108 using the source 116 or other suitable equipment.
- the transport devices 10 travel with the fluid 114 down to the drilling assembly 110 .
- the transport devices 10 self-actuate and deliver the payload.
- the drilling assembly 110 may include a bypass 124 that directs the transport devices 10 into the annulus 118 and thereby avoids passage through the drill bit 114 .
- the bypass 124 may be a passage or opening that allows selective fluid flow from the bore of the tubing 108 to the annulus 118 .
- a physical device such as a filter or an electromagnetic field may be used to pull the transport devices 10 from the fluid flowing to the drill bit 114 and urge them to exit via the bypass 124 into the annulus 118 .
- the transport devices 10 may be configured to be actuated by a downhole signal rather than being self-actuated.
- the drilling assembly 110 may include an activator 126 that transmits an activation signal that activates the transport devices 10 .
- the activator 126 may generate a magnetic field, an electrical signal, thermal energy, an acoustical signal or other data-encoded signal that may be received and understood by the transport devices 10 .
- the transport devices 10 may acquire a sample, may stop a sampling activity, or perform some other function.
- transport devices 10 may be embedded in the wellbore wall 120 or deeper in the formation itself and may be programmed to be activated at a predetermined time or by the occurrence of a specified event.
- the device 10 may be positioned anywhere along the wellbore 100 , including at a wellbore bottom 101 .
- the transport devices 10 may be designed to be deposited on the borehole wall during the drilling process.
- a transport device 10 A may be connected to the drill tubing 108 and conveyed into the wellbore 100 .
- the transport device 10 A may be released into the wellbore 100 at a desired time or location and thereafter return to the surface via the returning fluid.
- the transport device 10 A may be fluid conveyable for only a section of the wellbore and carrier conveyable for the another section of the wellbore.
- the drilling may be performed with reverse flow.
- reverse flow drilling at least a portion of the wellbore annulus is used for conveying fluid into the wellbore and at least a portion of the tubing is used to convey fluid out of the wellbore.
- the transport device may be released into the wellbore annulus at the surface.
- FIG. 6 is a schematic illustration of a production well 200 wherein transport devices 10 are released into the produced fluid or formation fluid 202 , which carries these devices to the surface.
- FIG. 6 shows a well 204 that has a well casing 206 installed therein. Formation fluid 202 flows into the well 204 through perforations 210 . The fluid 208 enters the wellbore and flows to the surface via a production tubing 212 .
- FIG. 6 does not show the various production devices, such as flow control screens, valves and submersible pumps, etc.
- a plurality of transport devices 10 are conveyed into the well 204 or stored and/or in a suitable container at a selected location 214 in the well 204 .
- the devices 10 are selectively released into the flow of the produced fluid 208 .
- the devices 10 are retrieved by a retrieval unit 216 and analyzed.
- the retrieval/recovery units 122 , 216 may use physical devices such as filters or screens to retrieve the devices 10 from the returning fluid. Non physical devices such a magnetic field may also be used to retrieve the devices 10 . Additionally, in certain embodiments, the units 122 , 216 may include interrogation devices that may establish a uni-directional or bi-directional communication link with the devices 10 at or near the surface.
- the method may include activating a fluid conveyable device in a wellbore to convey a payload between an interior and an exterior of the fluid conveyable device.
- the apparatus may include a fluid conveyable device having an interior space for receiving the payload and a access control member for conveying the payload between the interior and the exterior of the fluid conveyable device.
Abstract
A fluid conveyable device having an interior space receives a payload that may be transported along at least a section of a borehole. The device includes a access control member for conveying the payload between the interior and the exterior of the fluid conveyable device.
Description
- This application claims priority from U.S. Provisional Application Ser. No. 61/323,197, filed Apr. 12, 2010, the disclosure of which is incorporated herein by reference in its entirety.
- 1. Field of the Disclosure
- This disclosure is directed to devices and methods for transporting materials or devices in a borehole.
- 2. Background of the Disclosure
- Hydrocarbons, such as oil and gas, may reside in subsurface formations. Hydrocarbon-bearing formations are usually referred to as the producing zones or oil and gas reservoirs or “reservoirs.” To obtain hydrocarbons from such formations, wellbores or boreholes are drilled from a surface location or “well site” on land or offshore into one or more such reservoirs. A wellbore is usually formed by drilling a borehole of a desired diameter or size by a drill bit conveyed from a rig at the well site. The drill string includes a hollow tubing attached to a drilling assembly at its bottom end. The drilling assembly includes the drill bit for drilling the wellbore. The tubing usually made by joining relatively small sections of rigid metallic pipe or a continuous tubing. During drilling of a wellbore, drilling fluid is supplied from the surface through the drilling tubing. The drilling fluid passes through the drilling assembly, and discharges at the drill bit bottom. The drilling fluid discharged at the drill bit bottom returns to the surface via an annulus between the drill string and the wellbore.
- During this drilling activity, or during subsequent activities, it may be desirable to sample one or more fluids and/or other materials in the wellbore and/or the formation. It may also be desirable to deliver a payload, e.g., a material or device, to a selected location in the borehole. The present disclosure addresses the need for such sampling.
- In aspects, the present disclosure provides a method for transporting a material in a borehole. The method may include activating a fluid conveyable device in a wellbore to convey a payload between an interior and an exterior of the fluid conveyable device.
- In aspects, the present disclosure also provides an apparatus for transporting a material in a wellbore. The apparatus may include a fluid conveyable device having an interior space for receiving the payload and a access control member for conveying the payload between the interior and the exterior of the fluid conveyable device.
- Examples of the more important features of the disclosure have been summarized in order that the detailed description thereof that follows may be better understood and in order that the contributions they represent to the art may be appreciated. There are, of course, additional features of the disclosure that will be described hereinafter and which will form the subject of the claims appended hereto.
- For detailed understanding of the present disclosure, reference should be made to the following detailed description of the disclosure, taken in conjunction with the accompanying drawing:
-
FIG. 1 illustrates a transport device made in accordance with one embodiment of the present disclosure; -
FIGS. 2A-B schematically illustrate a transport device that uses a biasing activator in accordance with one embodiment of the present disclosure; -
FIGS. 3A-B schematically illustrate a transport device that uses a piston-based activator in accordance with one embodiment of the present disclosure; -
FIG. 4A schematically illustrates a transport device that uses a permeable membrane in accordance with one embodiment of the present disclosure; -
FIG. 4B schematically illustrates a transport device that uses a shape memory material in the activating mechanism in accordance with one embodiment of the present disclosure; -
FIG. 5 illustrates transport devices made in accordance with one embodiment of the present disclosure used during drilling; and -
FIG. 6 illustrates transport devices made in accordance with one embodiment of the present disclosure used during post-drilling activities. - The present disclosure relates to methods and devices for sampling a downhole material and/or delivering a material or device to a downhole location. The material may be an engineered fluid introduced from the surface, such as a drilling fluid, or a naturally occurring fluid such as a hydrocarbon. The material may also include solids. The transport device may be formed as a capsule, receptacle or other such enclosure that selectively obtains a sample of a downhole fluid or other material and return that sample to the surface. The transport device may be an autonomous or semi-autonomous device that is adapted to be moved by a fluid flowing along the wellbore. Illustrative devices according to the present disclosure may be of relatively small size; e.g., a nanometers to a few centimeters in outer dimensions. As will be described in greater detail, exemplary devices may be configured to initiate the sampling activity based on a particular activation criteria (e.g., pressure, temperature, time, depth, fluid composition, etc.). When activated, the device captures a predetermined amount of a fluid and/or other material, the payload, and then seals the sample within the device. In certain embodiments, the transport device may include one or more sensors to measure ambient wellbore conditions, fluid composition, depth, temperature, pressure, etc. The transport device may flow to the surface where it is recovered and the retrieved sample may be analyzed.
- Referring now to
FIG. 1 , there is shown one embodiment of atransport device 10 made in accordance with the present disclosure. The device may include a receptacle orshell 12 that includes aninterior space 14 for receiving a sample of a downhole material or delivering a material or device in the wellbore. For simplicity, the sampled material or delivered material/device will be collectively referred to as a payload. The terms enclosure, receptacle, shell and capsule may be used interchangeably herein and do not imply any functionality beyond a structure configured to store a payload. Theshell 12 may be formed of a material such as metals or composites that exhibit sufficient material properties (e.g., toughness, compressive strength, etc.) to withstand the abrasions, pressures and dynamic stresses associated with the harsh wellbore environment. Additionally, the material should be sufficiently chemically inert relative to the corrosive wellbore environment. Moreover, theshell 12 should be sufficiently strong (e.g., tensile strength) to withstand the pressure applied by the material inside theshell 12 as that material expands. The sample may include a fluid (e.g., a liquid or gas), a solid, or semi-solid, or combinations thereof. As noted previously, the fluid may be a fluid introduced from the surface and/or an in situ fluid. Theshell 12 may be configured as a free-standing device that can traverse a wellbore without being fixed or otherwise connected to a conveyance device or carrier such as a tubing, wireline, slickline, or drill string. The enclosure (e.g., shell or capsule) need not be configured to traverse the wellbore in both directions (e.g., uphole and downhole) independently. For example, the enclosure may be conveyed to a downhole location and then released to independently return to the surface. For instance, in certain embodiments, theshell 12 may be tethered to a rigid or non-rigid conveyance member. Illustrative conveyance members include, but are not limited to, wires, optical fibers, umbilicals, capillary tubes, etc. In certain embodiments, the conveyance member may have a size small enough to fit in a bore of a tubular or an annulus between two tubulars. Moreover, the weight of the conveyance member may be selected such that the conveyance member and thetransport device 10 may flow with a fluid; e.g., the conveyance member may be neutrally buoyant. Alternatively, the enclosure may be released to independently traverse the wellbore to a downhole location and then retrieved by a carrier. The term “fluid conveyable,” therefore, in one aspect, means traversing at least a portion of the wellbore without substantial assistance of a moving carrier, which may be a rigid or non-rigid carrier. The fluid may be the prime mover that transports the enclosure and/or the media through which the enclosure floats or sinks. The term “carrier-free,” in one aspect, means substantially unconnected to a rigid or non-rigid carrier for the purposes of travelling through a wellbore. Additionally, theshell 12 may be shaped to flow with or pass through wellbore fluids. While a spherical shape is shown, other shapes, both symmetric and asymmetric, may be used. Thechamber 14 may be configured to be fluid-tight, e.g., liquid tight or gas-tight. - An
access control member 16 allows selective communication between theinterior space 14 and the wellbore environment. As will be described in further detail below, numerous devices and methodologies may be used to control communication with theinterior space 14. In embodiments, thetransport device 10 may include aninstrument package 18 in theinterior space 14. In one embodiment, theinstrument package 18 may include one ormore sensors 20, ananalysis tool 22, anactivator 24, acommunication device 25, and apower supply 26. Additionally, some embodiments may include one more sensors 28 for measuring a parameter of interest external to thedevice 10. Thesensors 20, 28 may provide estimates of any number of parameters related to theinterior space 14 and the materials therein or the conditions outside of thedevice 10. The data generated by any component of theinstrument package 18 may be stored as either material characteristics change or in solid state memory. Thecommunication device 25 may provide unidirectional or bi-direction communication between thedevice 10 and the surface and/or subsurface equipment. Thepower supply 26 may be a power storage device, a downhole power generator, a chargeable induction type of device, or other suitable device for storing, receiving, and/or generating power. While a number of components have been shown for theinstrument package 18, it should b understood than less than all may be used for any given application. In embodiments, thedevice 10 may also include propulsion or steering devices that direct thedevice 10 to a desired location. - In certain embodiments, the
analysis tool 22 may be configured to estimate one or more parameters relating to the sample. The analysis may include sensors for estimating any number of desired parameters of the sampled material. Illustrative sensors include, but are not limited to, optical sensors, molecularly impregnated polymers, etc. These sensors may provide information as to fluid composition (e.g., the presence of emulsifiers, surfactants, or fluid loss materials), quantification of trace amounts of gases such as H2S, or trace amounts of metals, such as mercury, nickel or vanadium in either crude oil or formation brines, etc. In one embodiment, theanalysis tool 22 may include an information processor, a data storage medium, processor memory. Data storage medium may be any standard computer data storage device, hard disk, removable RAM, EPROMs, EAROMs, flash memories, etc. Data storage medium stores a program that when executed causes information processor to execute the disclosed method. Information processor may be any form of computer or mathematical processing hardware. - In the
FIG. 1 embodiment, theaccess control member 16 may include avalve element 30 that allows selective payload delivery between the exterior of thedevice 10 and theinterior space 14. In some embodiments, thevalve element 30 may be directly responsive to an environmental stimulus. For instance, thevalve element 30 may be configured to permit flow into thechamber 14 only after a predetermined pressure differential exists between thechamber 14 and the exterior of the device. Thus, such a device may be considered to be pressure activated. In another embodiment, thevalve element 30 may include a heatmeltable plug element 32 that melts at a pre-determined temperature. Once melted,valve element 30 may admit fluid into thechamber 14. Thevalve element 30 may in embodiments be a uni-directional valve that only allows fluid to enter but not leave thechamber 14. Thus, such a device may be considered to be temperature activated. In certain embodiments, theplug element 32 may dissolve or disintegrate when exposed to a selected stimulus (e.g., a chemical, EM energy, etc.). - In other arrangements, the
valve element 30 may be responsive to an activation signal. For example, theactivator 24 may include a timer that is programmed with a pre-determined time delay. Once the time delay has expired, theactivator 24 may transmit a signal (e.g., an electrical signal) to theaccess control member 16. In response to the signal, theaccess control member 16 may open to allow fluid flow into thechamber 14. Such a device may be considered to be time activated. In other embodiments, theactivator 24 may receive data from the sensor 28 relating to a selected parameter or parameters (e.g., pressure, temperature, fluid composition, etc.). Theactivator 24 may transmit the activation signal to thevalve element 30 upon detecting a specified value or values for the selected parameter(s). In still other embodiments, thevalve element 30 may be activated by an external signal from the surface and/or a downhole location. For instance, thevalve element 30 may be a solenoid-type valve activated by an electromagnetic signal. - It should be appreciated that the transport devices according to the present disclosure may be susceptible to numerous embodiments. Some non-limiting embodiments are described in connection with
FIGS. 2-5 below. - Referring now to
FIGS. 2A and B, there is shown an embodiment oftransport device 10 made in accordance with the present disclosure that includes ashell 40 that defines aninterior space 42 for receiving a sample of a downhole material. Theshell 40 may be formed of any material previously discussed. Theshell 40 includes afirst section 44 and asecond section 46 that separate to communication between theinterior space 42 and the wellbore environment. Numerous devices may be used to open and close thesections member 48 may be used to separate thesections member 48 may be configured to apply a biasing force that tends to at least partially open thesections member 48 may be a spring, compressed gas, or other device configured to apply a displacing force. As shown inFIG. 2B , asuitable actuator 50 may be used to release this biasing force to open thesections interior space 42. It should be appreciated that thesections sections FIG. 1 ), in theinterior space 42 as previously discussed. - It should be appreciated that embodiments, such as the
FIG. 1 embodiment, may be used as a delivery device. That is, one or more materials or devices may be formed as a payload within thespace 42. Theshell 40 may be opened at a selected location in the wellbore to deliver the payload. The payload may be a material (e.g., a chemical agent or additive) or a device configured to perform a downhole task. - It should be understood that the type of actuator used may depend, in part, on the size of the transport device. For instance, transport devices that may be in the centimeter range for size may use biasing elements as discussed above. For transport devices in the millimeter, micrometer and nanometer scale, micro-machined devices, elastomers, molecularly impregnated polymers, piezoelectric elements, magnetostrictive elements, shape memory alloys, magnetic elements, or other suitable devices may be used to selective admit fluid into the interior of the transport device. In certain embodiments, semi-conductor type processes may be used to form miniature sensors that may be incorporated into the shell. Also, in embodiments, batch type manufacturing processes may be used to embed nano-sensors in the
device 10. In still further embodiments, thedevice 10 may use a porous/permeable material that is at least partially filled with a displaceable material. For example, the porous material may be a sponge-like material that includes a meltable material such as wax, or some other dissolvable material. In response to a given stimulus (e.g., pressure or temperature), the porous/permeable material releases the meltable material. The released material may function as an activator to initiate sampling, may perform some analysis (e.g., by interacting with a sampled material), and/or some other function. - Referring now to
FIGS. 3A and B, there is shown an embodiment oftransport device 10 made in accordance with the present disclosure that includes ashell 60 that defines aninterior space 62 for receiving a sample of a downhole material. Theshell 60 may be formed of any material previously discussed. Theshell 60 includes aexterior shell section 64 and aninterior shell section 66 that can rotate relative to one another. Eachsection openings 68 a, b, respectively. In the sealed position (FIG. 3A ), theports 68 a, b are misaligned. In the sealed position (FIG. 3B ), theports 68 a,b are aligned. Numerous devices may be used rotate thesections actuator 70 for generating such rotation may include apiston 72 fixed to theexterior shell section 64 and acylinder 74 fixed to the interior shell section 68. Thepiston 72 andcylinder 74 may have mating threads formed to cause thecylinder 74 to rotate as the piston 73 translates axially. The piston may be actuated by pressure in a chamber 76. In one arrangement, the piston may be displaced from an initial position by a predetermined wellbore pressure in the chamber 76. A biasing member (not shown) may resist movement of the piston until the predetermined wellbore pressure is present and may further urge thepiston 72 back to the initial position after the predetermined pressure is no longer present. In other embodiments a motor may be used to generate rotational power for rotating theshells - Referring now to
FIG. 4A , there is shown yet another embodiment oftransport device 10 made in accordance with the present disclosure. The device may include a selectivelypermeable shell 80 that includes aninterior space 82 for receiving a sample of a downhole material. Theshell 80 may be formed partially or wholly of a membrane or material configured to allow only one or more selected material, e.g., solids, liquids, gases, or mixtures thereof, to flow into theinterior space 82. In embodiments, thetransport device 10 may include a permeable material in theinterior space 82. The material that passes through theshell 80 may be stored in the pores or interior spaces of thepermeable material 84. In some embodiments, an instrument package, e.g., package 18 (FIG. 1 ), may be positioned in theinterior space 82. - It should be understood that while a number of features have been described for the
transport device 10, not all need to be present in any particular embodiment. For example, as shown in theFIG. 4A embodiment, atransport device 10 may only include a space for receiving a sample. Additionally, while the Figures depict thetransport device 10 as spherical. Other shapes, such as “egg” shapes, colloids, tubulars, cubes, may also be used. - Referring now to
FIG. 4B , there is shown an exemplary embodiment oftransport device 10 that uses a shape memory material. Thedevice 10 may include a selectivelypermeable shell 90 that includes aninterior space 92 for receiving a sample of a downhole material or a payload from the surface. Theshell 90 may be formed in any manner previously described. In embodiments, thedevice 10 may include anactivator 94 having apin 95 that co-acts with acatch 96. Ashank 97 of thepin 95 includes a first head 98A and a second head 98B. Thecatch 96 may be a clamp-type device that is at least partially formed of a “smart material,” e.g., shape memory alloy, that is responsive to an applied stimulus such as heat or electromagnetic signal. To open thedevice 10, an applied activation signal causes the shape memory material of thecatch 96 opens to a diameter that allows passage of the first head 98A. Thecatch 96 may thereafter shrink or may engage the second head 98B. After the sampling or delivery of the payload, external pressure and/or an internal biasing force may be used to close the device. At that time, thecatch 96 may be reactivated to allow the first head 98A to translate through thecatch 96 to close the device. - In embodiments, the buoyancy of the
device 10 may be controlled. For example, thedevice 10 may be formed to be neutrally buoyant, positively buoyant, or negatively buoyant. In some embodiments, the buoyancy may be adjustable or variable. For instance, when introduced into the well, thedevice 10 may be negatively buoyant to assist in sinking into the wellbore. Thereafter, thedevice 10 may become neutrally buoyant or positively buoyant to assist in rising to the surface. In one arrangement, ballast (not shown) may be affixed to the interior or exterior of thedevice 10. This ballast may be released from thedevice 10 at a selected time or may be calibrated to dissolve or otherwise disengage from thedevice 10. - Referring now to
FIG. 5 , thetransport devices 10 are shown deployed during drilling of awellbore 100. Thewellbore 100 is drilled by adrill string 102 from asurface location 104. Acasing 106 is placed at an upper section of thewellbore 100 to prevent collapsing of thewellbore 100. Thedrilling string 102 includes atubing 108, which may be a drill pipe made from joining smaller sections of rigid pipe or a coiled tubing, and adrilling assembly 110 attached to thebottom end 112 of thetubing 108. Thedrilling assembly 110 carries adrill bit 114, which is rotated to disintegrate the rock formation. Any suitable drilling assembly may be utilized for the purpose of this disclosure. To drill thewellbore 100,drilling fluid 115 from asource 116 is supplied under pressure to thetubing 108. Thisdrilling fluid 115 exits at thedrill bit 114 and returns to the surface via anannulus 118 between thetubing 108 and awellbore wall 120. - In one illustrative embodiment, the
transport devices 10 may be programmed, calibrated or otherwise configured to activate upon the detection of a given condition or event, e.g., pressure, temperature, time, activation signal, etc. Next, one ormore transport devices 10 are released into thetubing 108 using thesource 116 or other suitable equipment. Thetransport devices 10 travel with the fluid 114 down to thedrilling assembly 110. At predetermined times or conditions, thetransport devices 10 self-actuate and sample a surrounding fluid. As noted previously, a coded signal may also be transmitted to activate thetransport devices 10. The fluid may be captured in thetransport device 10. In certain embodiments, the fluid can also be analyzed and the results of the analysis may be stored as material characteristics change, in a solid state memory, or other suitable data storage device. The sampling may occur in thetubing 108 and/or in theannulus 118. Thetransport devices 10 return to thesurface 104 and may be recovered at asuitable recovery unit 122. The payload, i.e., the material samples and/or information, contained in the returningtransport devices 10 may be retrieved, interpreted and used as appropriate. - In an illustrative embodiment for payload delivery, the
transport devices 10 may be programmed, calibrated or otherwise configured to activate upon the detection of a given condition or event, e.g., pressure, temperature, time, activation signal, etc. Next, a material and/or device is inserted into one ormore transport devices 10 that are released into thetubing 108 using thesource 116 or other suitable equipment. Thetransport devices 10 travel with the fluid 114 down to thedrilling assembly 110. At predetermined times or conditions, thetransport devices 10 self-actuate and deliver the payload. - In one variant, the
drilling assembly 110 may include abypass 124 that directs thetransport devices 10 into theannulus 118 and thereby avoids passage through thedrill bit 114. Thebypass 124 may be a passage or opening that allows selective fluid flow from the bore of thetubing 108 to theannulus 118. For example, a physical device such as a filter or an electromagnetic field may be used to pull thetransport devices 10 from the fluid flowing to thedrill bit 114 and urge them to exit via thebypass 124 into theannulus 118. - In another variant, the
transport devices 10 may be configured to be actuated by a downhole signal rather than being self-actuated. For example, thedrilling assembly 110 may include anactivator 126 that transmits an activation signal that activates thetransport devices 10. For example, theactivator 126 may generate a magnetic field, an electrical signal, thermal energy, an acoustical signal or other data-encoded signal that may be received and understood by thetransport devices 10. In response to the activation signal, thetransport devices 10 may acquire a sample, may stop a sampling activity, or perform some other function. - In still other variants,
transport devices 10 may be embedded in thewellbore wall 120 or deeper in the formation itself and may be programmed to be activated at a predetermined time or by the occurrence of a specified event. Thedevice 10 may be positioned anywhere along thewellbore 100, including at awellbore bottom 101. In one embodiment, thetransport devices 10 may be designed to be deposited on the borehole wall during the drilling process. - In yet other variant, a transport device 10A may be connected to the
drill tubing 108 and conveyed into thewellbore 100. The transport device 10A may be released into thewellbore 100 at a desired time or location and thereafter return to the surface via the returning fluid. Thus, in embodiments, the transport device 10A may be fluid conveyable for only a section of the wellbore and carrier conveyable for the another section of the wellbore. - In still another drilling application, the drilling may be performed with reverse flow. During reverse flow drilling, at least a portion of the wellbore annulus is used for conveying fluid into the wellbore and at least a portion of the tubing is used to convey fluid out of the wellbore. In such embodiments, the transport device may be released into the wellbore annulus at the surface.
- Embodiments of the present disclosure may also be used during post-drilling activities.
FIG. 6 is a schematic illustration of a production well 200 whereintransport devices 10 are released into the produced fluid orformation fluid 202, which carries these devices to the surface.FIG. 6 shows a well 204 that has a well casing 206 installed therein.Formation fluid 202 flows into the well 204 throughperforations 210. The fluid 208 enters the wellbore and flows to the surface via aproduction tubing 212. For simplicity and ease of understanding,FIG. 6 does not show the various production devices, such as flow control screens, valves and submersible pumps, etc. A plurality oftransport devices 10 are conveyed into the well 204 or stored and/or in a suitable container at a selectedlocation 214 in thewell 204. Thedevices 10 are selectively released into the flow of the produced fluid 208. Thedevices 10 are retrieved by aretrieval unit 216 and analyzed. - The retrieval/
recovery units devices 10 from the returning fluid. Non physical devices such a magnetic field may also be used to retrieve thedevices 10. Additionally, in certain embodiments, theunits devices 10 at or near the surface. - From the above, it should be appreciated that what has been described includes, in part, a method for transporting a material in a borehole. The method may include activating a fluid conveyable device in a wellbore to convey a payload between an interior and an exterior of the fluid conveyable device.
- From the above, it should be appreciated that what has been described includes, in part, an apparatus for transporting a material in a wellbore. The apparatus may include a fluid conveyable device having an interior space for receiving the payload and a access control member for conveying the payload between the interior and the exterior of the fluid conveyable device.
- While the foregoing disclosure is directed to the preferred embodiments of the disclosure, various modifications will be apparent to those skilled in the art. It is intended that all variations within the scope of the appended claims be embraced by the foregoing disclosure.
Claims (17)
1. A method for transporting a payload in a borehole, comprising:
activating a fluid conveyable device in a wellbore to convey a payload between an interior and an exterior of the fluid conveyable device.
2. The method of claim 1 , wherein the activation is in response to an estimated parameter.
3. The method of claim 2 , wherein the estimated parameter is at least one of: (i) a pressure, (ii) a temperature, (iii) a duration of time; and (iv) a chemical parameter.
4. The method of claim 1 , wherein the activation is in response to a received signal.
5. The method of claim 1 , further comprising conveying the fluid conveyable device into the wellbore using a flowing fluid.
6. The method of claim 5 , wherein the fluid is a drilling fluid circulated in the wellbore.
7. The method of claim 1 , further comprising estimating downhole a parameter of interest relating to the collected downhole material.
8. The method of claim 1 , further comprising retrieving the fluid conveyable device from the wellbore using a flowing fluid.
9. The method of claim 1 , wherein the payload is conveyed from the interior to the exterior of the fluid conveyable device.
10. The method of claim 1 , wherein the payload is conveyed from the exterior to the interior of the fluid conveyable device.
11. An apparatus for transporting a payload in a wellbore, comprising:
a fluid conveyable device having an interior space for receiving the payload, and a access control member for conveying the payload between the interior and the exterior of the fluid conveyable device.
12. The apparatus of claim 11 , further comprising an activator configured to control flow of the down hole material into the device.
13. The apparatus of claim 12 , wherein the activator controls flow in response to at least one of an estimated: (i) pressure, (ii) temperature, and (iii) duration of time.
14. The apparatus of claim 12 , wherein the activator is responsive to an encoded signal.
15. The apparatus of claim 11 , wherein an outer dimension of the device is no greater than a millimeter.
16. The apparatus of claim 11 , wherein the interior space is sealed.
17. The apparatus of claim 11 , wherein the device includes at least one of: (i) a sensor configured to estimate a selected parameter of interest, and (ii) an analysis tool configured to estimate a parameter of interest relating to the downhole material in the device.
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NO20121195A NO20121195A1 (en) | 2010-04-12 | 2012-10-16 | Transport and analysis equipment for use in a borehole |
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Also Published As
Publication number | Publication date |
---|---|
WO2011130230A1 (en) | 2011-10-20 |
BR112012026000A2 (en) | 2016-06-28 |
GB2492025B (en) | 2014-02-12 |
NO20121195A1 (en) | 2013-01-14 |
GB201218337D0 (en) | 2012-11-28 |
GB2492025A (en) | 2012-12-19 |
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