US20150041147A1 - Oil well safety valve apparatus and method - Google Patents
Oil well safety valve apparatus and method Download PDFInfo
- Publication number
- US20150041147A1 US20150041147A1 US14/467,823 US201414467823A US2015041147A1 US 20150041147 A1 US20150041147 A1 US 20150041147A1 US 201414467823 A US201414467823 A US 201414467823A US 2015041147 A1 US2015041147 A1 US 2015041147A1
- Authority
- US
- United States
- Prior art keywords
- flow
- bore
- ball
- oil well
- safety shut
- 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
- 239000003129 oil well Substances 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims description 25
- 230000000979 retarding effect Effects 0.000 claims abstract description 24
- 238000005553 drilling Methods 0.000 claims abstract description 5
- 239000012530 fluid Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000005755 formation reaction Methods 0.000 description 3
- 230000004913 activation Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/08—Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B12/00—Accessories for drilling tools
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/12—Valve arrangements for boreholes or wells in wells operated by movement of casings or tubings
-
- E21B2034/002—
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
- E21B2200/04—Ball valves
Definitions
- the present invention relates to an oil well safety device that automatically shuts in or closes an oil well if the drill string is removed or responsive to removal of the drill string to a position above the safety device.
- Tremendous pressures can exist in formations where oil is located. Drillers use heavy fluids such as drilling mud to control well pressures and prevent a catastrophic blow out wherein oil and gas escape from the well bore.
- blow out preventers There are various control devices that hopefully close the well bore before a blow out can occur. Examples include blow out preventers, sub surface valves, sub surface safety valves and the like. Most such safety control devices require activation by personnel on a drilling structure. If these valve blow out preventers or valve structures cannot be actuated, blow out still occurs.
- the present invention provides an improved oil control device that automatically shuts in a well responsive to the removal of a drill string from the device.
- the device is thus placed in the well as a section of the well casing.
- the device provides a pair of bores, one that aligns with the well bore or well casing, the other being a branch flow line containing a ball structure that will close the well if the drill pipe or drill string is removed. While drilling, the drill string prevents entry of the ball structure into the main flow channel.
- the present invention thus provides an oil safety shut off method.
- a section of well casing having a well bore and the casing including a device having a first flow bore of a first diameter aligned generally with the well bore of the casing. In this fashion, flow through the casing also flows through the first flow bore with a first diameter.
- a second flow bore is provided that communicates with the first bore at two spaced apart positions to provide a lower flow entry from the first flow bore and an upper flow discharge into the first flow bore, the second flow bore having a diameter that is larger than the first diameter.
- a lower ball seat is provided in the second flow bore in between the lower flow entry and the upper flow discharge.
- a ball valving member is contained in the second flow bore above the lower seat.
- the method disallows entry of the ball valving member into the first flow bore by placing a ball retarding member in the first flow bore.
- the ball retarding member can occupy a position within the first flow bore next to the upper flow discharge.
- a removal of the ball retarding member enables the ball valving member to form a seal with the upper ball seat, slowing the flow of fluids upwardly in the first flow bore.
- the ball retarding member can be a work string.
- the ball retarding member can be a drill string.
- the ball retarding member can be a tube or tubing.
- the ball retarding member can be a member that extends to a work deck, drill deck, platform, work vessel, or earth surface area.
- FIG. 1 is a sectional elevation view of a preferred embodiment of the apparatus of the present invention
- FIG. 2 is a sectional elevation view of a preferred embodiment of the apparatus of the present invention.
- FIG. 3 is a sectional elevation view of a preferred embodiment of the apparatus of the present invention.
- FIGS. 4-6 are sectional elevation views of a preferred embodiment of the apparatus of the present invention and illustrating the method of the present invention.
- FIG. 7 is a sectional elevation view of a preferred embodiment of the apparatus of the present invention.
- Oil well safety shut off apparatus is shown in FIGS. 1-7 , designated generally by the numeral 10 .
- Oil well safety shut off apparatus 10 can be used in a well casing 11 that surrounds a well bore 12 and blow out preventer (BOP) 18 .
- BOP blow out preventer
- FIG. 7 a marine use is shown with drill ship 30 , casing 11 , blow out preventer 18 and seabed 31 . Oil producing formation 32 is below seabed 31 .
- a drill string, work string or other string 13 extends downwardly into the well bore 12 and through the first bore 23 of the device 10 .
- Circulating mud 21 can be located in first bore 23 .
- First bore 23 has a diameter dl designated by the numeral 19 . Diameter 19 of first bore 23 and the diameter of the well bore (i.e. casing 11 internal diameter) can be equal (see FIG. 7 ).
- a branch flow line 14 has a bore 15 with a diameter (d2) designated by the numeral 20 and larger than the diameter designated by the numeral 19 .
- the branch flow line 14 communicates with the first bore 23 at two spaced apart positions, namely lower opening 24 and upper opening 25 .
- a ball structure 17 is carried in branch flow line bore 15 in between openings 24 , 25 as shown.
- There is a lower seat 16 that prevents downward movement of ball valving member 17 .
- First bore 23 can have a guide 27 . Guide 27 can be used to help track the ball structure 17 during its travel.
- FIGS. 4-6 an alternate arrangement provides a section of tubing or drill string 13 A held in position in FIG. 4 with pin 28 .
- pin 28 is removed as indicated by arrow 29 .
- An ROV or remotely operated vehicle could be used to remove pin 28 and then remove drill string section 13 A.
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)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
- Pipe Accessories (AREA)
Abstract
An oil well control device automatically shuts in a well responsive to the removal of a work string (or other removable structure—ball retarding structure) from the device. The device is placed in the well as a section of the well casing. The device provides a pair of bores, one that aligns with the well bore or well casing, the other being a branch flow line containing a ball structure that will close the well if the drill pipe or drill string is removed. While conducting normal well activity (e.g. drilling, work over or the like) the ball retarder (e.g. work string) prevents entry of the ball structure into the main flow channel.
Description
- This is a non provisional patent application of U.S. Provisional Patent Application Ser. No. 61/356,905, filed Jun. 21, 2010, and U.S. Provisional Patent Application Ser. No. 61/361,204, filed Jul. 2, 2010.
- Priority of U.S. Provisional Patent Application Ser. No. 61/356,905, filed Jun. 21, 2010, and U.S. Provisional Patent Application Ser. No. 61/361,204, filed Jul. 2, 2010, each of which is incorporated herein by reference, is hereby claimed.
- Not applicable
- Not applicable
- 1. Field of the Invention
- The present invention relates to an oil well safety device that automatically shuts in or closes an oil well if the drill string is removed or responsive to removal of the drill string to a position above the safety device.
- 2. General Background of the Invention
- In the exploration of oil, wells are drilled many thousands of feet into the earth.
- Tremendous pressures can exist in formations where oil is located. Drillers use heavy fluids such as drilling mud to control well pressures and prevent a catastrophic blow out wherein oil and gas escape from the well bore.
- There are various control devices that hopefully close the well bore before a blow out can occur. Examples include blow out preventers, sub surface valves, sub surface safety valves and the like. Most such safety control devices require activation by personnel on a drilling structure. If these valve blow out preventers or valve structures cannot be actuated, blow out still occurs.
- The present invention provides an improved oil control device that automatically shuts in a well responsive to the removal of a drill string from the device. The device is thus placed in the well as a section of the well casing. The device provides a pair of bores, one that aligns with the well bore or well casing, the other being a branch flow line containing a ball structure that will close the well if the drill pipe or drill string is removed. While drilling, the drill string prevents entry of the ball structure into the main flow channel.
- The present invention thus provides an oil safety shut off method. As part of the method, there is provided a section of well casing having a well bore and the casing including a device having a first flow bore of a first diameter aligned generally with the well bore of the casing. In this fashion, flow through the casing also flows through the first flow bore with a first diameter.
- A second flow bore is provided that communicates with the first bore at two spaced apart positions to provide a lower flow entry from the first flow bore and an upper flow discharge into the first flow bore, the second flow bore having a diameter that is larger than the first diameter.
- There is an upper ball seat above the upper flow discharge.
- A lower ball seat is provided in the second flow bore in between the lower flow entry and the upper flow discharge.
- A ball valving member is contained in the second flow bore above the lower seat.
- The method disallows entry of the ball valving member into the first flow bore by placing a ball retarding member in the first flow bore. The ball retarding member can occupy a position within the first flow bore next to the upper flow discharge.
- A removal of the ball retarding member enables the ball valving member to form a seal with the upper ball seat, slowing the flow of fluids upwardly in the first flow bore.
- In one embodiment, the ball retarding member can be a work string.
- In one embodiment, the ball retarding member can be a drill string.
- In one embodiment, the ball retarding member can be a tube or tubing.
- In one embodiment, the ball retarding member can be a member that extends to a work deck, drill deck, platform, work vessel, or earth surface area.
- For a further understanding of the nature, objects, and advantages of the present invention, reference should be had to the following detailed description, read in conjunction with the following drawings, wherein like reference numerals denote like elements and wherein:
-
FIG. 1 is a sectional elevation view of a preferred embodiment of the apparatus of the present invention; -
FIG. 2 is a sectional elevation view of a preferred embodiment of the apparatus of the present invention; -
FIG. 3 is a sectional elevation view of a preferred embodiment of the apparatus of the present invention; -
FIGS. 4-6 are sectional elevation views of a preferred embodiment of the apparatus of the present invention and illustrating the method of the present invention; and -
FIG. 7 is a sectional elevation view of a preferred embodiment of the apparatus of the present invention. - Oil well safety shut off apparatus is shown in
FIGS. 1-7 , designated generally by thenumeral 10. Oil well safety shut offapparatus 10 can be used in a wellcasing 11 that surrounds a well bore 12 and blow out preventer (BOP) 18. InFIG. 7 , a marine use is shown withdrill ship 30,casing 11, blow outpreventer 18 and seabed 31.Oil producing formation 32 is below seabed 31. - A drill string, work string or
other string 13 extends downwardly into thewell bore 12 and through thefirst bore 23 of thedevice 10. Circulatingmud 21 can be located infirst bore 23.First bore 23 has a diameter dl designated by thenumeral 19.Diameter 19 offirst bore 23 and the diameter of the well bore (i.e. casing 11 internal diameter) can be equal (seeFIG. 7 ). - A
branch flow line 14 has abore 15 with a diameter (d2) designated by thenumeral 20 and larger than the diameter designated by thenumeral 19. Thebranch flow line 14 communicates with thefirst bore 23 at two spaced apart positions, namelylower opening 24 andupper opening 25. Aball structure 17 is carried in branch flow line bore 15 in betweenopenings lower seat 16 that prevents downward movement ofball valving member 17. There is anupper seat 22 or seal ring that prevents upward movement of valvingmember 17 should work string (or other ball retarding member) be removed frombores seat 22.First bore 23 can have aguide 27.Guide 27 can be used to help track theball structure 17 during its travel. - During normal well activity, ball retarding structure or
work string 13 prevents entry ofball 17 intobore 12 or 23 (seeFIGS. 1 and 3 ). If a blow out condition seems likely, the operators would pullwork string 13 upwardly in the direction ofarrow 26 inFIG. 4 and past seat orseal ring 22. This action freesball 17 to seal with seat orseal ring 22. Becausediameter 20 is larger thandiameter 19, fluid flow traveling into branch flow line bore 15 will pushball 17 upwardly and into contact with upper seat or seal 22 (seeFIGS. 2-6 ). InFIGS. 4-6 , an alternate arrangement provides a section of tubing ordrill string 13A held in position inFIG. 4 withpin 28. InFIG. 5 ,pin 28 is removed as indicated byarrow 29. An ROV or remotely operated vehicle could be used to removepin 28 and then removedrill string section 13A. - The following is a list of suitable parts and materials for the various elements of a preferred embodiment of the present invention.
-
PARTS LIST Part Number Description 10 oil well safety shut off apparatus 11 casing 12 well bore 13 work string/ drill string 13A section of string/ tubing 14 branch flow line 15 branch flow line bore 16 lower seal seat 17 ball structure 18 blow out preventer/ BOP 19 well bore diameter (d1) 20 branch flow line diameter (d2) 21 circulating mud 22 upper seal seat/ seal ring 23 first bore of device 24 lower opening 25 upper opening 26 arrow 27 guide 28 pin 29 arrow 30 drill ship/ wellhead area 31 seabed 32 formation - The foregoing embodiments are presented by way of example only; the scope of the present invention is to be limited only by the following claims.
Claims (21)
1. An oil well safety shut off method, comprising the steps of:
a) providing in a section of well casing having a well bore, a device having a first flow bore of a first diameter aligned generally with the well bore of the casing so that flow through the casing also flows through the first flow bore;
b) providing a second flow bore that communicates with the first bore at two spaced apart positions to provide a lower flow entry from the first flow bore and an upper flow discharge into the first flow bore, the second flow bore having a diameter that is at least in part larger in transverse cross section than the first diameter;
c) providing an upper ball seat above the upper flow discharge;
d) providing a lower ball seat in the second flow bore in between the lower flow entry and the upper flow discharge;
e) placing a ball valving member in the second flow bore above the lower seat;
f) disallowing entry of the ball valving member into the first flow bore by placing a ball retarding member in the first flow bore, the ball retarding member occupying a position within the first flow bore next to the upper flow discharge; and
g) a removal of the ball retarding member enabling the ball valving member to form a seal with the upper ball seat, slowing the flow of fluids upwardly in the first flow bore.
2. The oil well safety shut off method of claim 1 wherein the ball retarding member is manipulated from a wellhead area.
3. The oil well safety shut off method of claim 1 wherein the ball retarding member extends above and below the upper flow discharge.
4. The oil well safety shut off method of claim 1 wherein the second flow bore has at least one inclined section and in step “f” the ball retarding member does not enter the inclined section.
5. The oil well safety shut off method of claim 4 wherein in step “g” the ball retarding member does not enter the inclined section.
6. The oil well safety shut off method of claim 1 wherein the ball retarding member is a work string that extends from a wellhead area to the device.
7. The oil well safety shut off method of claim 1 wherein the ball retarding member is a string of tubular material that extends from a wellhead area to the device.
8. The oil well safety shut off method of claim 1 wherein the ball retarding member is a string of pipe and further comprising manipulating the string of pipe from a wellhead area.
9. The oil well safety shut off method of claim 1 wherein the ball retarding member is a string of pipe and further comprising lifting and lowering the string of pipe.
10. The oil well safety shut off method of claim 1 wherein the ball retarding member is a work string and further comprising the step of lifting and lowering the work string.
11. The oil well safety shut off method of claim 1 wherein the ball retarding member is a string of pipe and further comprising lifting and lowering the string of pipe.
12. The oil well safety shut off method of claim 1 wherein the ball retarding member is a string of tubular material and further comprising the step of lifting and lowering the string of tubular material.
13. The oil well safety shut off method of claim 1 further comprising the step of circulating drilling fluid in at least one of the flow bores.
14. An oil well safety shut off method, comprising the steps of:
a) providing in a section of well casing having a well bore, the casing including a device having a first flow bore of a first minimum diameter aligned generally with the bore of the casing so that flow through the casing also flows through the first flow bore;
b) providing a second flow bore that communicates with the first bore at two spaced apart positions to provide a lower flow entry from the first flow bore and an upper flow discharge into the first flow bore, the second flow bore having a portion with a diameter that is larger than the first diameter;
c) providing an upper ball seat above the upper flow discharge;
d) providing a lower ball seat in the second flow bore in between the lower flow entry and the upper flow discharge;
e) placing a valving member in the second flow bore above the lower seat;
f) disallowing entry of the valving member into the first flow bore by placing a work string in the first flow bore, the work string extending above and below the upper flow discharge; and
g) a removal of the work string enabling the valving member to form a seal with the upper seat, slowing the flow of fluids upwardly in the first flow bore.
15. The oil well safety shut off method of claim 14 wherein the valving member is a ball valving member.
16. The oil well safety shut off method of claim 14 wherein the second flow bore has an inclined section.
17. The oil well safety shut off method of claim 16 wherein the valving member travels from a position in communication with the inclined section to a position removed from the inclined section in step “g”.
18. The oil well safety shut off method of claim 16 wherein the inclined section is above the lower seat.
19. The oil well safety shut off method of claim 14 further comprising the step of lifting and lowering the work string.
20. The oil well safety shut off method of claim 14 wherein the upper seat has a diameter that is about equal to the diameter of the lower seat.
21-26. (canceled)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/467,823 US20150041147A1 (en) | 2010-06-21 | 2014-08-25 | Oil well safety valve apparatus and method |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US35690510P | 2010-06-21 | 2010-06-21 | |
US36120410P | 2010-07-02 | 2010-07-02 | |
US13/162,249 US8813849B1 (en) | 2010-06-21 | 2011-06-16 | Oil well safety valve apparatus and method |
US14/467,823 US20150041147A1 (en) | 2010-06-21 | 2014-08-25 | Oil well safety valve apparatus and method |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/162,249 Continuation US8813849B1 (en) | 2010-06-21 | 2011-06-16 | Oil well safety valve apparatus and method |
Publications (1)
Publication Number | Publication Date |
---|---|
US20150041147A1 true US20150041147A1 (en) | 2015-02-12 |
Family
ID=51358408
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/162,249 Active 2032-07-05 US8813849B1 (en) | 2010-06-21 | 2011-06-16 | Oil well safety valve apparatus and method |
US14/467,823 Abandoned US20150041147A1 (en) | 2010-06-21 | 2014-08-25 | Oil well safety valve apparatus and method |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/162,249 Active 2032-07-05 US8813849B1 (en) | 2010-06-21 | 2011-06-16 | Oil well safety valve apparatus and method |
Country Status (1)
Country | Link |
---|---|
US (2) | US8813849B1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11643907B2 (en) * | 2020-08-17 | 2023-05-09 | Innovex Downhole Solutions, Inc. | Ball-type downhole valve |
US11851960B2 (en) * | 2022-05-09 | 2023-12-26 | Disruptive Downhole Technologies, Llc | Method for isolation of borehole pressure while performing a borehole operation in a pressure isolated borehole zone |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9151148B2 (en) * | 2009-10-30 | 2015-10-06 | Packers Plus Energy Services Inc. | Plug retainer and method for wellbore fluid treatment |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US193605A (en) | 1877-07-31 | Ball-check valves foe sewers | ||
US1034995A (en) * | 1912-03-13 | 1912-08-06 | Prime Edward Gannon | Converter-valve. |
US1124933A (en) * | 1914-04-28 | 1915-01-12 | James R Mccumber | Valved hose-connecting conduit. |
US2249172A (en) * | 1939-12-19 | 1941-07-15 | Lane Wells Co | Circulation bridging plug |
US3269463A (en) | 1963-05-31 | 1966-08-30 | Jr John S Page | Well pressure responsive valve |
US3568768A (en) | 1969-06-05 | 1971-03-09 | Cook Testing Co | Well pressure responsive valve |
US3850194A (en) * | 1973-01-09 | 1974-11-26 | Brown Oil Tools | Check valve assembly |
US3850191A (en) | 1973-01-09 | 1974-11-26 | Brown Oil Tools | Check valve assembly |
US4108203A (en) | 1974-08-08 | 1978-08-22 | Brown Oil Tools, Inc. | Check valve assembly |
US4069840A (en) | 1976-01-30 | 1978-01-24 | Brown Cicero C | Ball check valve |
US4171019A (en) | 1978-01-12 | 1979-10-16 | Davis-Lynch, Inc. | Apparatus and method for re-entering and cementing an underwater well |
US4263936A (en) * | 1979-10-09 | 1981-04-28 | Brown Oil Tools, Inc. | Erosion resistant check valve assembly |
US4266605A (en) * | 1980-04-28 | 1981-05-12 | Laborde Russel G | Wireline safety check valve |
US4577614A (en) | 1983-05-02 | 1986-03-25 | Schoeffler William N | Advanced quick ball release sub |
US4694855A (en) | 1984-09-28 | 1987-09-22 | Hughes Tool Company - Usa | Drill pipe inside blowout preventer |
US5086802A (en) * | 1990-10-22 | 1992-02-11 | Spears Harry L | Safety check valve |
US5261895A (en) * | 1991-09-26 | 1993-11-16 | Stryker Corporation | Apparatus for guiding surgical instruments into a surgical site and blocking escape of fluids from the site |
US7100700B2 (en) | 2002-09-24 | 2006-09-05 | Baker Hughes Incorporated | Downhole ball dropping apparatus |
US6966368B2 (en) | 2003-06-24 | 2005-11-22 | Baker Hughes Incorporated | Plug and expel flow control device |
US7878237B2 (en) | 2004-03-19 | 2011-02-01 | Tesco Corporation | Actuation system for an oilfield tubular handling system |
-
2011
- 2011-06-16 US US13/162,249 patent/US8813849B1/en active Active
-
2014
- 2014-08-25 US US14/467,823 patent/US20150041147A1/en not_active Abandoned
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9151148B2 (en) * | 2009-10-30 | 2015-10-06 | Packers Plus Energy Services Inc. | Plug retainer and method for wellbore fluid treatment |
Also Published As
Publication number | Publication date |
---|---|
US8813849B1 (en) | 2014-08-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1270870B1 (en) | Blow out preventer testing apparatus | |
RU2362005C2 (en) | Method of conservation, completion and repair of well | |
AU2009232499B2 (en) | Systems and methods for subsea drilling | |
US8387705B2 (en) | Systems and methods for running casing into wells drilled with dual-gradient mud systems | |
US20160168934A1 (en) | Systems and methods for managing pressure in a wellbore | |
US20080185152A1 (en) | Pressure control with compliant guide | |
NO338633B1 (en) | Method for underbalanced wellbore and system for supplying density-reducing fluid to a subsea location | |
NO338632B1 (en) | Apparatus and method for controlling formation fluid flow into a borehole production tube | |
US9835009B2 (en) | Method and apparatus for managing annular fluid expansion and pressure within a wellbore | |
NO324167B1 (en) | System and method for dynamic sealing around a drill string. | |
US20090236100A1 (en) | Plug retrieval and debris removal tool | |
US10808483B2 (en) | System for hydrocarbon recovery | |
US9051824B2 (en) | Multiple annulus universal monitoring and pressure relief assembly for subsea well completion systems and method of using same | |
GB2389599A (en) | Tubing annulus valve | |
US20130213663A1 (en) | Surface multiple well | |
US6044690A (en) | Shearable multi-gage blowout preventer test tool and method | |
NO20111506A1 (en) | Universal frachylse | |
US6390194B1 (en) | Method and apparatus for multi-diameter testing of blowout preventer assemblies | |
US6902005B2 (en) | Tubing annulus communication for vertical flow subsea well | |
US20150041147A1 (en) | Oil well safety valve apparatus and method | |
US11634954B2 (en) | Surge reduction system for running liner casing in managed pressure drilling wells | |
CA2859874C (en) | Oil well safety valve apparatus and method | |
WO2016028323A1 (en) | Oil well safety valve apparatus and method | |
US11753905B2 (en) | Downhole tool actuator with viscous fluid clearance paths | |
CA3152650A1 (en) | Side saddle rig design with integrated mpd |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |