US20130269281A1 - Protective Enclosure for a Wellhead - Google Patents
Protective Enclosure for a Wellhead Download PDFInfo
- Publication number
- US20130269281A1 US20130269281A1 US13/893,775 US201313893775A US2013269281A1 US 20130269281 A1 US20130269281 A1 US 20130269281A1 US 201313893775 A US201313893775 A US 201313893775A US 2013269281 A1 US2013269281 A1 US 2013269281A1
- Authority
- US
- United States
- Prior art keywords
- enclosure
- panels
- well head
- steel
- protective enclosure
- 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
- 230000001681 protective effect Effects 0.000 title claims abstract description 42
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 62
- 239000010959 steel Substances 0.000 claims abstract description 62
- 238000000034 method Methods 0.000 claims description 13
- 238000000429 assembly Methods 0.000 description 11
- 230000000712 assembly Effects 0.000 description 10
- 241000191291 Abies alba Species 0.000 description 9
- 235000004507 Abies alba Nutrition 0.000 description 9
- 239000003921 oil Substances 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 3
- 230000001012 protector Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B17/00—Accessories in connection with locks
- E05B17/20—Means independent of the locking mechanism for preventing unauthorised opening, e.g. for securing the bolt in the fastening position
- E05B17/2007—Securing, deadlocking or "dogging" the bolt in the fastening position
- E05B17/203—Securing, deadlocking or "dogging" the bolt in the fastening position not following the movement of the bolt
- E05B17/2034—Securing, deadlocking or "dogging" the bolt in the fastening position not following the movement of the bolt moving pivotally or rotatively
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B63/00—Locks or fastenings with special structural characteristics
- E05B63/18—Locks or fastenings with special structural characteristics with arrangements independent of the locking mechanism for retaining the bolt or latch in the retracted position
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
- E05C3/00—Fastening devices with bolts moving pivotally or rotatively
- E05C3/02—Fastening devices with bolts moving pivotally or rotatively without latching action
- E05C3/04—Fastening devices with bolts moving pivotally or rotatively without latching action with operating handle or equivalent member rigid with the bolt
- E05C3/041—Fastening devices with bolts moving pivotally or rotatively without latching action with operating handle or equivalent member rigid with the bolt rotating about an axis perpendicular to the surface on which the fastener is mounted
- E05C3/045—Fastening devices with bolts moving pivotally or rotatively without latching action with operating handle or equivalent member rigid with the bolt rotating about an axis perpendicular to the surface on which the fastener is mounted in the form of a hook
-
- 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
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/0021—Safety devices, e.g. for preventing small objects from falling into the borehole
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B13/00—Devices preventing the key or the handle or both from being used
- E05B13/002—Devices preventing the key or the handle or both from being used locking the handle
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
A protective enclosure for protecting well head equipment at a surface location is made up of an open framework of structural members which surround and protect the well head. Individual steel panels are assembled to form a series of upstanding walls which are covered by a series of roof panels and which together define the quasi-enclosed area surrounding the well head. The roof panels are covered with a steel grating which forms a covered roof for the protective enclosure. The tubing which makes up the steel panels is spaced to allow access to the enclosed area by a worker needing to access the well head.
Description
- The present application is a continuation-in-part of earlier filed Ser. No. 13/214,380, filed Aug. 22, 2011, entitled “Protective Enclosure For A Wellhead”, by the same inventor.
- B. Field of the Invention
- The present invention relates generally to a system and apparatus for protecting equipment associated with oil and gas producing wells and, more specifically, for protecting exposed well head equipment such as Christmas trees, valves and accessory equipment located at the well surface.
- C. Description of the Prior Art
- The nature of the ordinary well head is such that it embodies sufficient control means that the well can be adjusted to safely produce at a desired rate. Depending on the type of formation being produced and other factors, the well head itself can assume different proportions and embody varying forms of equipment adapted to the particular conditions at hand. It is customary in the oil and gas industry to refer to the upper most portion of the well head as it leaves the surface of the ground as the “Christmas tree.” The Christmas tree is generally an assembly of valves, tees, crosses, and other fittings at the well head used to control oil or gas production and to give access to the well tubing. Other fittings such as choke jackets, pressure gauges, and the like, can become part of what is known in the art as the “Christmas tree.” Many times, a master valve is provided on the Christmas tree which controls the flow of gas or oil directly from the well itself. This valve can be closed, preventing any flow from the well to the Christmas tree itself.
- Other valuable devices, such as additional expensive valves, may also be present at the well head. Many times, a very expensive control valve may be mounted on a pipeline itself. These valves and controllers are quite expensive, and their damage likewise brings a loss of production or supply of oil or gas flowing with the pipeline. While this assembly of valves, tees and other fittings which is affixed to the gas well or oil well at the well head is fairly sturdy in construction, it is possible for it to become damaged in a number of different situations.
- One way in which damage can occur is due to the nature of the proximity of plural wells being complete within feet of each other. Often, where a highly productive oil or gas reserve field is discovered, a number of wells will be drilled into the area, each being furnished with a well head which protrudes just above the ground. Often in a highly productive area, these well heads are closely spaced. This situation creates particular concern where a new well is being completed in close proximity to an already completed well head or well heads. It is always possible that equipment can be dropped on the existing well head/heads, for example, by a crane being used to move a new Christmas tree into position at the site. The undesirable consequence of such damage could be an uncontrolled flow of the crude oil or gas. There have been instances, for example, where well heads have been damaged to the point of requiring replacement of one or more of the component parts.
- Various schemes have been proposed for protecting both surface well head equipment and also sub-sea well head equipment. However, the prior art proposals have generally been lacking in one or more respects. For example, certain of the prior art constructions were permanent in nature and were not easily removed or transported from one well site to another.
- A further feature of a suitable well head protective enclosure for the present purposes is that it must accommodate workover tools and instruments which are periodically inserted into the well for various reasons. It is also obviously necessary for worker personnel to be able to access the well head components to perform these and other customary operations. The protective enclosure must not impede these necessary operations.
- It has therefore become a desirable to provide some form of protective enclosure for a well head of the type under consideration, especially where several well heads are located in close proximity. Preferably, the protective structure would be designed to deflect or deter damaging contact between a well head and heavy moving objects or lines. A primary function of the protective enclosure would be to permit the well head to operate in a safe manner and yet be readily accessible for workover purposes and/or for inspection, routine maintenance, or other such purposes. The enclosure would also preferably be assembled from a number of component parts which could be disassembled and transported to another location, when desired, with a minimum of effort being required for the disassembly.
- Thus, despite the advances which have been made in well head construction, there continues to exist a need for an improved well head enclosure which would meet the previously expressed needs.
- In order to address the foregoing needs, there is presently provided a well head protector which is sufficiently sturdy to perform its designed function, and yet can be readily transported to and installed at a remote well head location. The protector is thus initially fabricated into discrete sub-assemblies which can be easily transported to a desired well location, as by truck. After use, the protective enclosure can be broken down into its respective component parts and transported to another location and reassembled.
- The preferred protective enclosure is comprised of an open framework of structural members which define a quasi-enclosed area adapted to surround and protect the well head. The open framework of structural members is made up of a plurality of individual steel panels, each of the steel panels being constructed of lengths of square steel tubing, the panels being assembled to form a series of upstanding walls which are covered by a series of roof panels and which together define the quasi-enclosed area surrounding the well head. The series of roof panels are, in turn, covered with a steel grating which forms a covered roof for the protective enclosure. The lengths of square steel tubing which make up the steel panels are spaced a selected distance apart which allows access to the quasi-enclosed area by a worker needing to access the well head.
- Preferably, the individual steel panels which make up the protective enclosure are joined together using a plurality of lever latch and keeper assemblies. Each of the lever latches is rotatably mounted on one of the lengths of square steel tubing making up one of the steel panels, the associated keeper assembly including a lock element. The lever latch and keeper assemblies are movable between a locked position which temporarily locks the steel panels together and an unlocked position which allows the protective enclosure to be disassembled for transportation to a different location.
- In one preferred form of the invention, the series of roof panels are connected to the steel grating which forms the covered roof for the protective enclosure by a plurality of removable U-bolts. The steel grating can conveniently be provided with a series of upstanding ring members which allow the steel grating to be lifted into position on the roof panels.
- Preferably, at least selected ones of the lengths of square steel tubing making up the upstanding walls of the enclosure is provided with a telescoping leg which can be moved between a retracted position inside the respective length of steel tubing, and an extended position which provides an exposed length of tubing which can be cemented into the ground at the well location. The telescoping leg includes at least one locking hole for receiving a locking member. In the most preferred form, there are at least two locking holes provided in each telescoping leg, the holes being spaced to allow the telescoping leg to be locked in either the extended or retracted position. The telescoping leg and associated length of steel tubing can also be provided with aligned holes which receive a locking pin when the telescoping leg is in the extended position to further secure the telescoping leg.
- The lever latch assemblies, telescoping legs and removable roof grating allow the entire enclosure to be disassembled by retracting the telescoping legs and unlocking the lever latch and keeper assemblies, whereby the enclosure can be easily disassembled and moved to another well location.
- Additional objects, features and advantages will be apparent in the written description which follows.
-
FIG. 1 is a perspective view of the protective wellhead enclosure of the invention showing the assembled steel panels and roof grating in place on the well head equipment. -
FIG. 2A is an isolated view of one of the lengths of square steel tubing which makes up one of the structural panels of the enclosure, the associated lever latch and keeper assembly which is used to connect adjacent panels being shown in the unlocked position. -
FIG. 2B is a view similar toFIG. 2A , but showing the lever latch and keeper assembly in the locked position. -
FIG. 3 is an isolated view of a section of the steel roof grating, the grating being shown attached to the associated steel structural panels by a pair of U-bolts. -
FIG. 4 is an isolated view of the lower portion of one of the structural panels, showing the telescoping leg extending from the panel and the lock members used to retain the telescoping leg in the extended position. -
FIG. 5 is a partial perspective view of another version of the protective enclosure of the invention showing U-bolts being used to join the individual panels of the enclosure and showing a cemented retaining arrangement. -
FIG. 6 is a close up view of the alternate cemented retaining arrangement ofFIG. 5 . - The preferred version of the invention presented in the following written description and the various features and advantageous details thereof are explained more fully with reference to the non-limiting examples included in the accompanying drawings and as detailed in the description which follows. Descriptions of well-known components and processes and manufacturing techniques are omitted so as to not unnecessarily obscure the principle features of the invention as described herein. The examples used in the description which follows are intended merely to facilitate an understanding of ways in which the invention may be practiced and to further enable those skilled in the art to practice the invention. Accordingly, the examples should not be construed as limiting the scope of the claimed invention.
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FIG. 1 is a perspective view of the protective enclosure of the invention, designated generally as 11. Theenclosure 11 is used to enclose a number of different closely spaced well head component assemblies, such asassemblies - As will be appreciated from
FIG. 1 , theprotective enclosure 11 encloses the well heads 13, 15, at the surface location above ground in order to preclude encounter between the well head and objects which might be brought into damaging contact therewith. Theprotective enclosure 11 is made up of an open framework of structural members which define a quasi-enclosed area adapted to surround and protect the plurality of well heads. The open framework of structural members is itself comprised of a plurality of individual steel panels, such aspanels steel panels - The
panels panel 21 inFIG. 1 and the portion of thepanel 23 inFIG. 3 ) and which together define the quasi-enclosed area surrounding the well head. The series of roof panels are, in turn, covered with a steel grating which forms a covered roof for the protective enclosure. The steel grating can be provided in, for example, square or rectangular sections, such assections FIG. 1 . The steel grating is preferably provided with some sort of attachment elements to facilitate moving and placing the grating on top of the assembly, as by a crane. In the example illustrated inFIG. 1 , the grating is provided with a series ofupstanding ring members - As best seen in
FIG. 3 , the series of roof panels (such as panel 23) are connected to the steel grating 25 which forms the covered roof for the protective enclosure by a plurality of removable U-bolts 31. The U-bolts pass up, over and around the openings in the grating and are secured in place by means of across plate 33 andend nuts - As shown in
FIGS. 2A and 2B , the individual steel panels which make up the protective enclosure are joined together using a plurality of lever latch and keeper assemblies, 39, 41, respectively. InFIG. 3 , twopanel uprights lever latch 39 andkeeper assembly 41.FIG. 2A shows the lever latch and keeper assembly in the open or unlocked position, whileFIG. 2B shows these members in the closed and locked position. Eachlever latch 39 is rotatably mounted on one of the lengths of square steel tubing making up one of the steel panels uprights, such asupright 45. The associatedkeeper assembly 41 also preferably includes alock element 47. It is necessary to rotate thelock element 47 in order to release the lever latch from the closed and locked position shown inFIG. 2B . The lever latch and keeper assemblies can thus be seen to be movable between a locked position which temporarily locks the steel panel together and an unlocked position which allows the protective enclosure to be disassembled for transportation to a different location. - While the
protective enclosure 11 could be assembled using the lever latch and keeper assemblies and merely set up on the well site, it is often desirable to further secure the enclosure to the ground. This is preferably accomplished, as shown inFIG. 4 , by providing at least selected ones of the lengths of square steel tubing (such as the leg or end wall 49) making up the upstanding walls of the enclosure with atelescoping leg 51. Thetelescoping leg 51 can be moved between a retracted position inside the respective length of steel tubing, and an extended position (shown inFIG. 4 ) which provides an exposed length of tubing which can be cemented into the ground at the well location. When it is desired to move the enclosure, thetelescoping leg 51 can be dug up and thecement block 53 knocked off. - Preferably, the
telescoping leg 51 includes at least one lockinghole 53 for receiving a locking member, such asmembers members FIG. 4 are threaded bolts which can be tightened in order to secure the telescoping leg in the desired position, either extended or retracted. As an added safety measure, the telescoping leg and associated length of steel tubing can be provided with aligned holes which receive alocking pin 59 when the telescoping leg is in the extended position to further secure the telescoping leg. In the example illustrated inFIG. 4 , the lockingpin 59 traverses both thetelescoping leg 51 and theupright member 49 and is held in place by acotter pin 61. -
FIGS. 5 and 6 show another version of the protective wellhead enclosure of the invention. In the version of the enclosure shown inFIG. 5 , the individual panels making up the enclosure are joined together by one of more U-bolts 67, such as the U-bolts 69 used to affix the roof grating to the assembly. The version of the invention shown inFIGS. 5 and 6 also uses a different type of cemented retaining arrangement to ensure that the enclosure is firmly fixed in position, while at the same time allowing the enclosure to be easily moved to an alternate location when desired. -
FIG. 6 shows the alternative cemented retaining arrangement in close up fashion for ease of illustration. The retaining arrangement (designated generally as 71) includes aretainer plate 73 which is buried in the earth, along with it's downwardly extendinglegs plate 73 is a generally planar member arranged generally parallel to the earth surface in which it is buried with the legs extending downwardly therefrom. The legs in the example shown are made of rerbar steel reinforcing material which is welded to the bottom surface of theplate 73. The opposing top surface of theplate 73 has anupstanding ring member 79 which is joined to asimilar ring member 81 on the panel upright 83 by means of theU-bolt 85. When it becomes necessary to take down or move the enclosure, theU-bolt 85 is simply removed, freeing the panel of the enclosure and leaving the retainingplate 73 and it's component parts behind. These can simply be covered with dirt for esthetic purposes. - An invention has been provided with several advantages. The protective enclosure of the invention is relatively simple in design and economical to manufacture. It can be manufactured from readily available materials of the type commonly found around oil field operations. The enclosure is extremely sturdy and can withstand impacts of various kinds to protect the enclosed well head equipment. The open nature of the assembly continues to allow workers to access the well head equipment for routine tasks or repairs. Because the enclosure is made up of a series of interlocked panels, it can be easily disassembled and moved to another well site with a minimum of effort.
- While the invention has been shown in several of its forms, it is not thus limited and is susceptible to various changes and modifications without departing from the spirit thereof.
Claims (17)
1. A protective enclosure for encompassing an upstanding well head located at a well surface location above ground in order to preclude encounter between the well head and objects which might be brought into damaging contact therewith, the protective enclosure comprising:
an open framework of structural members which define a quasi-enclosed area adapted to surround and protect the well head,
the open framework of structural members being comprised of a plurality of individual steel panels, each of the steel panels being constructed of lengths of square steel tubing, the panels being assembled to form a series of upstanding walls which are covered by a series of roof panels and which together define the quasi-enclosed area surrounding the well head;
wherein the series of roof panels are, in turn, covered with a steel grating which forms a covered roof for the protective enclosure;
wherein the lengths of square steel tubing which make up the steel panels are spaced a selected distance apart which allows access to the quasi-enclosed area by a worker needing to access the well head.
2. The protective enclosure of claim 1 , wherein the individual steel panels which make up the protective enclosure are joined together using a plurality of U-bolts.
3. The protective enclosure of claim 2 , wherein series of roof panels are connected to the steel grating which forms the covered roof for the protective enclosure by a plurality of removable U-bolts.
4. The protective enclosure of claim 3 , wherein the steel grating is provided with a series of upstanding ring members which allow the steel grating to be lifted into position on the roof panels.
5. The protective enclosure of claim 4 , wherein steel panels which make up the enclosure include upright legs and horizontal legs, and wherein at least selected ones of the legs are affixed to surrounding earth by a cemented retaining arrangement.
6. The protective enclosure of claim 5 , wherein the cemented retaining arrangement includes a generally planar retainer plate with a top surface arranged generally parallel to the surrounding surface of the earth once cemented in place, and downwardly extending retainer legs.
7. The protective enclosure of claim 6 , wherein the retaining plate and its associated retaining legs is joined to the selected leg of the enclosure by an upstanding ring member on the plate and a similar upstanding ring member on the enclosure leg, the ring member being joined by a removable U-bolt.
8. The protective enclosure of claim 1 , wherein the above ground location is the site of multiple well heads which connect the surface location with multiple underground well bores.
9. A method of protecting an upstanding well head located at a well surface location above ground in order to preclude encounter between the well head and objects which might be brought into damaging contact therewith, the method comprising the steps of:
transporting a plurality of structural members from a distant location to the well surface location containing the upstanding well head;
assembling the open framework of structural members to thereby define a quasi-enclosed area adapted to surround and protect the well head,
the open framework of structural members being comprised of a plurality of individual steel panels, each of the steel panels being constructed of lengths of square steel tubing, the panels being assembled to form a series of upstanding walls which are covered by a series of roof panels and which together define the quasi-enclosed area surrounding the well head;
covering the series of roof panels with a steel grating which forms a covered roof for the protective enclosure;
wherein the lengths of square steel tubing, when assembled, are spaced a selected distance apart which allows access to the quasi-enclosed area by a worker needing to access the well head.
10. The method of claim 9 , wherein the individual steel panels which make up the protective enclosure are joined together using a plurality of U-bolts.
11. The method of claim 10 , wherein series of roof panels are connected to the steel grating which forms the covered roof for the protective enclosure by a plurality of removable U-bolts.
12. The method of claim 11 , wherein the steel grating is provided with a series of upstanding ring members and wherein the grating is transported into a desired position by lifting the grating with the upstanding ring members.
13. The method of claim 1 , wherein steel panels which make up the enclosure include upright legs and horizontal legs, and wherein the steps of the method include the steps of affixing at least selected ones of the legs of the enclosure to surrounding earth by a cemented retaining arrangement.
14. The method of claim 13 , wherein the steps of affixing using the cemented retaining arrangement include digging a hole in a surface location and burying a planar retaining plate in the hole, the retaining plate having one or more depending retaining legs.
15. The method of claim 14 , wherein the generally planar retainer plate is buried below the surrounding earth surface and has a top surface arranged generally parallel to the surrounding surface of the earth once cemented in place.
16. The method of claim 15 , wherein the retaining plate and its associated retaining legs are joined to the selected leg of the enclosure by an upstanding ring member on the plate and a similar upstanding ring member on the enclosure leg, the ring member being joined by a removable U-bolt.
17. The method of claim 16 , further comprising the steps of:
separating each buried retaining plate and its associated retaining legs from the selected leg of the enclosure by removing the associated U-bolt;
disassembling the enclosure; and
moving the enclosure to another desired location.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/893,775 US20130269281A1 (en) | 2011-08-22 | 2013-05-14 | Protective Enclosure for a Wellhead |
US14/557,129 US9187904B2 (en) | 2011-08-22 | 2014-12-01 | Protective enclosure for a wellhead |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/214,380 US20130047525A1 (en) | 2011-08-22 | 2011-08-22 | Protective Enclosure for a Wellhead |
US13/893,775 US20130269281A1 (en) | 2011-08-22 | 2013-05-14 | Protective Enclosure for a Wellhead |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US13/214,380 Continuation-In-Part US20130047525A1 (en) | 2011-08-22 | 2011-08-22 | Protective Enclosure for a Wellhead |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/557,129 Continuation-In-Part US9187904B2 (en) | 2011-08-22 | 2014-12-01 | Protective enclosure for a wellhead |
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US20130269281A1 true US20130269281A1 (en) | 2013-10-17 |
Family
ID=49323815
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US13/893,775 Abandoned US20130269281A1 (en) | 2011-08-22 | 2013-05-14 | Protective Enclosure for a Wellhead |
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US (1) | US20130269281A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150034295A1 (en) * | 2013-07-30 | 2015-02-05 | Shane Byron Osborne | Wellhead Protector |
US20160017592A1 (en) * | 2014-04-10 | 2016-01-21 | John N. McCarthy | Well head protector |
USD815268S1 (en) * | 2017-02-16 | 2018-04-10 | Lennox Industries Inc. | Removable base rail section for a replacement rooftop unit (RTU) |
USD815267S1 (en) * | 2016-11-28 | 2018-04-10 | Robert J. Stanton | Air conditioner enclosure |
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Publication number | Priority date | Publication date | Assignee | Title |
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US20150034295A1 (en) * | 2013-07-30 | 2015-02-05 | Shane Byron Osborne | Wellhead Protector |
US20160017592A1 (en) * | 2014-04-10 | 2016-01-21 | John N. McCarthy | Well head protector |
USD815267S1 (en) * | 2016-11-28 | 2018-04-10 | Robert J. Stanton | Air conditioner enclosure |
USD815268S1 (en) * | 2017-02-16 | 2018-04-10 | Lennox Industries Inc. | Removable base rail section for a replacement rooftop unit (RTU) |
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