WO1996027068A1 - Position detection devices - Google Patents
Position detection devices Download PDFInfo
- Publication number
- WO1996027068A1 WO1996027068A1 PCT/GB1996/000444 GB9600444W WO9627068A1 WO 1996027068 A1 WO1996027068 A1 WO 1996027068A1 GB 9600444 W GB9600444 W GB 9600444W WO 9627068 A1 WO9627068 A1 WO 9627068A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- magnet
- members
- relative
- flux
- detector
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
- G01D5/147—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the movement of a third element, the position of Hall device and the source of magnetic field being fixed in respect to each other
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1014—Flexible or expansible centering means, e.g. with pistons pressing against the wall of the well
-
- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/02—Determining slope or direction
- E21B47/024—Determining slope or direction of devices in the borehole
-
- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/09—Locating or determining the position of objects in boreholes or wells, e.g. the position of an extending arm; Identifying the free or blocked portions of pipes
- E21B47/092—Locating or determining the position of objects in boreholes or wells, e.g. the position of an extending arm; Identifying the free or blocked portions of pipes by detecting magnetic anomalies
Definitions
- This invention relates to position detection devices, and is more particularly,
- a trajectory control device in the form of an adjustable
- stabiliser blades which normally engage the borehole wall in order to centre the drill
- the stabiliser blades are first
- the inner member is preferably fixedly positioned within the part
- the outer member is preferably a hollow end portion of a movable shaft which, in known manner, serves
- the stabiliser blades are extended or retracted.
- magnet poles may be aligned along the direction of movement between the members.
- Figure 1 is a diagrammatic axial section through an adjustable stabiliser
- Figure 2 is an explanatory diagram showing the principle of flux directional control in operation of the device
- Figure 3 is a diagrammatic perspective view of the detector of the device
- Figure 4 is an explanatory diagram showing two relative positions of the inner
- Figure 5 is a diagram indicating a possible modified internal profile of the
- Figure 6 is a graph showing the non-linear characteristic of the device
- Figure 7 is a block diagram of the control circuitry of the device.
- FIG. 8 is a block diagram of the control circuitry of a modified form of the
- Figure 9 is a diagrammatic axial section through the modified form of the
- FIGS. 10 and 11 are explanatory diagrams showing two forms of a rotary
- adjustable stabiliser provided in a bottomhole assembly of a drill string within a
- Such a position detection device may also be used to monitor the
- the adjustable stabiliser 1 is shown positioned in a drill
- the position detection device incorporates a remote sensor module 7 (RSM)
- actuating shaft is in its lefthand position corresponding to retraction of the blades 3.
- the actuating shaft 4 is made of a soft magnetisable material, such as a low carbon
- the detector 8 includes a permanent magnet 9, such as an Alnico or samarium-
- cobalt magnet which is positioned so that the magnet axis joining its opposite poles
- the detector 8 includes a
- the sensor 15 which is the associated electronics of the sensor module is also mounted.
- the sensor 15 which is the associated electronics of the sensor module is also mounted.
- the sensor 15 is mounted so as to lie close to the pole 10 with its sensing
- the sensor 15 will thereby provide an output which is directionally
- the detector comprises only a single
- the detector it is advantageous for the detector to include more than one flux
- the detector includes a
- three flux sensors are positioned so as to compensate for positional
- actuating shaft is in one extreme position, the detector is located relative to the taper
- the detector will remain stationary and the surrounding actuating shaft
- the directional flux sensor is incorporated in an oscillator circuit which
- variable frequency output signal having a frequency dependent on the
- Figure 6 is a graph of the frequency of such an output
- FIG. 7 is a block diagram of the oscillator circuit of the detector showing
- a data signalling system which may be used in this application is disclosed
- the reference sensor 30 is included in a control loop which
- reference magnet 35 which has the same orientation as the magnet 9 but is disposed
- FIGS. 10 and 11 are diagrammatic representations of two possible rotary
- detector devices may be applied, for example, to an indexed barrel cam mechanism used
- the sensor may
- member 40 has an annular wall 45 having a relatively thin portion 46 and a relatively
- thick portion 47 disposed diametrically opposite one another (rather than two relatively
- the sleeve member may be stepped, rather than being continuously variable. This
- Such stepped inner profiles may also be
- the outer member incorporates the detector including a permanent magnet
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Vehicle Body Suspensions (AREA)
- Radar Systems Or Details Thereof (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9717231A GB2313446B (en) | 1995-03-02 | 1996-02-29 | Position detection devices |
EP96904185A EP0811107A1 (en) | 1995-03-02 | 1996-02-29 | Position detection devices |
AU48378/96A AU690822C (en) | 1995-03-02 | 1996-02-29 | Position detection devices |
NO974003A NO974003L (en) | 1995-03-02 | 1997-09-01 | Position Detection Device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9504151.3 | 1995-03-02 | ||
GBGB9504151.3A GB9504151D0 (en) | 1995-03-02 | 1995-03-02 | Position detection devices |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1996027068A1 true WO1996027068A1 (en) | 1996-09-06 |
WO1996027068B1 WO1996027068B1 (en) | 1996-10-10 |
Family
ID=10770488
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1996/000444 WO1996027068A1 (en) | 1995-03-02 | 1996-02-29 | Position detection devices |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0811107A1 (en) |
CA (1) | CA2213849A1 (en) |
GB (1) | GB9504151D0 (en) |
NO (1) | NO974003L (en) |
WO (1) | WO1996027068A1 (en) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2108678A (en) * | 1981-10-17 | 1983-05-18 | Armstrong Patents Co Ltd | Shock absorber or ram position sensing system |
US4719419A (en) * | 1985-07-15 | 1988-01-12 | Harris Graphics Corporation | Apparatus for detecting a rotary position of a shaft |
GB2211297A (en) * | 1987-10-16 | 1989-06-28 | Bochumer Eisen Heintzmann | A pressure sensor |
EP0594419A1 (en) * | 1992-10-23 | 1994-04-27 | Halliburton Company | Adjustable blade stabilizer for drilling system |
US5311953A (en) * | 1992-08-07 | 1994-05-17 | Baroid Technology, Inc. | Drill bit steering |
EP0629834A1 (en) * | 1992-03-02 | 1994-12-21 | Seiko Epson Corporation | Displacement sensor |
-
1995
- 1995-03-02 GB GBGB9504151.3A patent/GB9504151D0/en active Pending
-
1996
- 1996-02-29 CA CA002213849A patent/CA2213849A1/en not_active Abandoned
- 1996-02-29 EP EP96904185A patent/EP0811107A1/en not_active Ceased
- 1996-02-29 WO PCT/GB1996/000444 patent/WO1996027068A1/en not_active Application Discontinuation
-
1997
- 1997-09-01 NO NO974003A patent/NO974003L/en unknown
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2108678A (en) * | 1981-10-17 | 1983-05-18 | Armstrong Patents Co Ltd | Shock absorber or ram position sensing system |
US4719419A (en) * | 1985-07-15 | 1988-01-12 | Harris Graphics Corporation | Apparatus for detecting a rotary position of a shaft |
GB2211297A (en) * | 1987-10-16 | 1989-06-28 | Bochumer Eisen Heintzmann | A pressure sensor |
EP0629834A1 (en) * | 1992-03-02 | 1994-12-21 | Seiko Epson Corporation | Displacement sensor |
US5311953A (en) * | 1992-08-07 | 1994-05-17 | Baroid Technology, Inc. | Drill bit steering |
EP0594419A1 (en) * | 1992-10-23 | 1994-04-27 | Halliburton Company | Adjustable blade stabilizer for drilling system |
Non-Patent Citations (1)
Title |
---|
GRIFFING B M: "Non-contact analog rotary position sensor", IBM TECHNICAL DISCLOSURE BULLETIN, JULY 1984, USA, vol. 27, no. 2, ISSN 0018-8689, pages 1195, XP002003012 * |
Also Published As
Publication number | Publication date |
---|---|
AU4837896A (en) | 1996-09-18 |
GB9504151D0 (en) | 1995-04-19 |
NO974003L (en) | 1997-10-31 |
EP0811107A1 (en) | 1997-12-10 |
CA2213849A1 (en) | 1996-09-06 |
AU690822B2 (en) | 1998-04-30 |
NO974003D0 (en) | 1997-09-01 |
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