US2846015A - Self fill differential collar - Google Patents
Self fill differential collar Download PDFInfo
- Publication number
- US2846015A US2846015A US658334A US65833457A US2846015A US 2846015 A US2846015 A US 2846015A US 658334 A US658334 A US 658334A US 65833457 A US65833457 A US 65833457A US 2846015 A US2846015 A US 2846015A
- Authority
- US
- United States
- Prior art keywords
- casing
- fluid
- valve body
- ports
- housing
- 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.)
- Expired - Lifetime
Links
- 239000012530 fluid Substances 0.000 description 58
- 238000004891 communication Methods 0.000 description 8
- 239000004568 cement Substances 0.000 description 7
- 230000002706 hydrostatic effect Effects 0.000 description 6
- 238000005553 drilling Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000007787 solid Substances 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/10—Valve arrangements in drilling-fluid circulation systems
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7837—Direct response valves [i.e., check valve type]
- Y10T137/7854—In couplings for coaxial conduits, e.g., drill pipe check valves
Definitions
- various so-called automatic devices have been developed. These devices are gen erally attached to the bottom of a string of casing and are modifications of the conventional float shoes or float collars. Such devices are of necessity complicated in design and operation, and in many instances do not operate too successfully.
- Such devices employ a valving means to control the flow of fluids from the bore hole into the casing, and they must also have another valving means for the discharge of fluids into the bore hole in order to place the cement around the casing.
- One object of this invention is to provide a novel improvement of the casing fill up device disclosed in the above Maly et al., application.
- Figure 1 is a diagrammatic view in elevation showing a casing provided with a conventional float shoe and the tool of the invention being lowered in a well bore.
- Figure 2 is a longitudinal cross sectional view of the tool in the closed position.
- Figure 3 is a cross sectional view taken along A-A of Figure 2.
- Figure 4 is a longitudinal cross sectional view of the tool opened so that fluids will enter the casing.
- Figure 5 is a longitudinal cross sectional view of the tool showing the permanent closure of the ports.
- Figure 1 illustrates a string of well casing 10 being lowered into a well bore 12. Assembled to the lower end of the casing 10 is a conventional float shoe 14. Placed above the float shoe 14, at any position desired in the string of casing 10, is the fill up tool 16 of the invention.
- the housing 18 of the tool 16 is adapted at 20 and 22 to be placed between two joints of the casing 10. If desired, the housing 18 may be connected at 22 directly to the float shoe 14 by means of an adapter coupling 23 and at 20 to the casing 10. At least two transverse ports 24 are provided in the housing 18.
- the hollow portions are designated by the numeral 42.
- Fitted around the outside of the lower portion of the valve body 38 is a sleeve 26 with ports 24a.
- Horizontal fluid passageways 2412 are provided in the valve body 38.
- shear pins 28 are provided to hold the sleeve 26 and the valve body 38 in temporary fixed relationship to the housing 13 and to hold the ports 24 and 24a in communication with the fluid passageways 24b.
- the sleeve 26 is provided with a groove 30 in which is placed a snap ring 32.
- the snap ring 32 is adapted to engage a groove 34 in the housing 18 when the sleeve 26 is in the position shown in Figure 5. Leakage of fluid between the housing 18 and the sleeve 26 is prevented by O-rings 36.
- the sleeve 26 is shown as fitted into a recess in the valve body 38 and is of a different material.
- the sleeve 26 could be constructed as an integral part of the valve body 38 without departing from the spirit of the invention.
- the preferred embodiment is shown in the drawing.
- a vertical conduit 40 is provided to connect the fluid passageway 24b with the hollow portions 42.
- a valve means 44 is positioned in a hollow cylinder 40a defined by the walls 41 of the valve body 38. At the point where the horizontal fluid passageway 24b and the vertical conduit 41) intersect, the interior of the valve body 38 is machined to provide a seat 46.
- the top 64 of the valve body 38 has a shear ring 66 inserted therein.
- the valve means 44 consists of several coacting elements.
- a piston 48 of clrillable material has a rubberlike plug 58 molded to its upper end.
- a rounded portion 52 of the nose 53 of the rubber like plug 50 has a smaller diameter than the base 54, which provides a bearing surface for the application of pressure.
- At the base 49 of the piston 48 is a coil spring 56 with a hollow spring retainer 58 positioned therein.
- the spring 56 and its retainer 58 are held in the position shown in the drawing by a retaining ring 60, which fits into a groove 62 of the valve body 38.
- An O-ring 68 prevents fluid leakage between the piston 48 and the portion of valve body 38 defined by the conduit 40a.
- the tool 16 is assembled in the string of well casing 10 at any place above the conventional float shoe 14. It a float collar is employed in addition to the float shoe 14, the tool is placed above such float collar. The assembly is then lowered in the bore hole 12, which contains drilling fluid. As the assembly is lowered additional joints of well casing 10 are added.
- the valve means 44 of the tool 16 is in the position shown in Figure 2 of the drawing, since the spring 56 exerts force on the piston 48, whereby the nose 52 of the rubber like plug 50 firmly engages the seat 46 of the valve body 38.
- valve in the float shoe 14 remains in the closed position, and the interior of the casing 10 remains empty until the embodiment of the invention begins to function.
- the fluid in the bore hole 12 enters the ports 24 as the assembly is lowered and exerts a pressure on the base 54 of the rubber like plug 50; such pressure at any depth is of course that of the hydrostatic head of the fluid in the bore hole 12.
- the spring 56 is of such strength that it will overbalance a predetermined pressure exerted by the hydrostatic head of the fluid.
- the spring 56 will maintain the valve means 44 in a closed position up to a pressure of 80 pounds per square inch (p. s. i.).
- the piston 48 moves downwardly and starts to compress the spring 56.
- the nose 52 of the rubber like plug 50 separates from the seat 46 and the fluid, then passes around and enters the vertical conduit 40. At this point the pressure of the hydrostatic head of the fluid is acting on the entire surface of the rubber like plug 50, and such increase in pressure snaps the piston 48 downwardly, whereby the valve means 44 assumes the open position as shown in Figure 4 of the drawing.
- the fluid inside the casing 10 will exert a pressure due to its hydrostatic head.
- the hydrostatic head of the fluid outside the casing 10 is greater than that of the fluid inside.
- Such difference is commonly termed the diflerential pressure.
- fluid will continue to enter the casing 10.
- the valve means 44 will close the passageway 24b and thereby prevent the entry of additional fluids.
- the spring 56 is so designed that at about a differential pressure of 60 p. s. i., it starts pushing the piston 48 upwardly.
- valve means 44 snaps shut and the system again assumes the position as shown in Figure 2 of the drawing.
- the differential pressure reaches about 80 p. s. i., the system again opens as described above and the fluid enters the casing 10.
- the valve means 44 normally has only two positions, either fully closed or fully opened. The intermediate position is barely perceptible due to the pressure exerted by the fluid and the spring 56. Such a feature is advantageous in that it prevents clogging the ports 24 and 24a and the passageway 24b.
- the next step in the operation is to cement the casing 10 in the bore hole 12, by any of the conventional methods employed in the art. After the cement is displaced it is desirable to seal ofl permanently the ports 24.
- a solid top plug'(not shown) is placed on top of the cement in order to displace the cement in the casing 10 out through the float shoe 14 at the bottom of the casing 10. In the embodiment of the invention such a plug will come to rest on the top 64 of the valve body 38. Increased pressure applied at the surface to the displacing fluid is transmitted through the top 64 to the valve body 38 and shears pins 28 between the housing 18 and the sleeve 26. The sleeve 26 and the valve body 38 move downwardly until the snap ring 32 engages the groove 34 in the housing 18, and the ports 24a of the sleeve 26 are moved out of communication with the ports 24 of the housing 18.
- the cement sets up around the outside of the casing to and inside the casing 10 to the top 64 of the valve '12, and hence has a tendency to float.
- valve body 38 If desired the cement, the valve body 38 and the valve means 44 are then drilled out.
- the present invention is adapted also to overcome some common difficulties encountered in lowering casing through fluid into a well bore.
- the passageway 24b would be automatically closed by the valve means 44, as is described in the operation above, since the differential pressure would not be sufficient to overcome the force exerted by the spring 56.
- the valve means 44 is maintained in the closed position, as shown in Figure 2.
- the circulating fluid passes down through the casing 10 by means of pump pressure exerted at the surface.
- the fluid passes around the valve means 44 and the tubular passageway 24b through the hollow portions 42.
- the fluid in the conduit 4% acts on the nose 53 of the rubber like plug 50, which would tend to move the valve means 44 downwardly and hence unseat it.
- the pressure of the fluid in the casing 10 also acts on the base 49 of the piston 48.
- the base 49 is so constructed that it is of a larger cross sectional area than that of the nose 53 of the rubber like plug 50. Therefore, the pressure acting upwardly on the base 49 is greater than that acting downwardly on the nose 53, so the valve means 44 is aided by the spring 56 will remain firmly closed. As soon as the circulation operation is completed the tool 16 operates as has been described above.
- Suflicient pressure is applied to the ball so that the pins 28 shear, whereby the sleeve 26 and the valve body 38 move down and close off the ports 24 as described above.
- the ball In order to perform the cementing operation the ball must be removed. This is accomplished by additional pressure on the ball, which breaks the shear ring 66, allowing the ball to fall into the space 42, where it will not obstruct flow through the bottom of the casing during the cementing operation.
- this invention provides a novel automatic means to fill a well casing as it is lowered into a well bore and that such device provides a solution in the event certain common dithculties are encountered.
- An improved device for automatically filling with fluid a conduit lowered into a well bore comprising, in combination, a housing connected to said conduit, said housing having ports, a hollow valve body fitted inside said housing, said valve body having connecting horizontal and vertical fluid passageways, a sleeve disposed inside said housing and disposed around said valve body, said sleeve having ports in temporary communication with the ports in said housing, said sleeve being adapted to close the ports in said housing, shearable means adapted to hold said sleeve and said valve body in temporary fixed relationship to said housing, said shearable means being adapted to hold said ports and said horizontal fluid passageways in temporary communication, and valve means in said valve body adapted to control automatically the flow of fluids through said ports and said fluid passageways, as said conduit is being lowered into a well bore, said valve means being operated automatically as the fluid pressures inside said conduit and outside said conduit vary.
- A11 improved device for automatically filling with fluid a conduit lowered into a well bore comprising, in combination, a housing connected to said conduit, said housing having transverse ports, a hollow valve body fitted inside said housing, said valve body having connecting horizontal and vertical fluid passageways, a sleeve having transverse ports fitted in a recess in said valve body, shearable means adapted to hold said sleeve and said valve body in temporary fixed relationship to said housing, said shearable means being adapted to hold said transverse ports and said horizontal fluid passage- Ways in temporary communication, and valve means in said valve body adapted to automatically close said horizontal and vertical fluid passageways to the flow of fluids from the well bore into the said conduit by the action of differential pressure as said conduit is being lowered into a well bore.
- An improved device for automatically filling with fluid a conduit lowered into a well bore comprising, in combination, a housing connected to said conduit, said housing having transverse ports, a hollow valve body fitted inside said housing, said valve body having connecting horizontal and vertical fluid passageways, a sleeve having transverse ports fitted in a recess in said valve body, shearable means adapted to hold said sleeve and said valve body in temporary fixed relationship to said housing, said shearable means being adapted to hold said transverse ports and said horizontal fluid passageways in temporary communication, and valve means in said valve body adapted to automatically open said horizontal and vertical passageways to the flow of fluids from the well bore into the said conduit by the action of diiferential pressure, as said conduit is being lowered into a well bore.
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Lift Valve (AREA)
- Safety Valves (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DENDAT1072935D DE1072935B (de) | 1957-05-10 | Regelventil zum selbsttätigen Füllen eines Futterrohrstranges mit Bohrlochflussig keit beim Herablassen in ein Tiefbohrloch | |
| US658334A US2846015A (en) | 1957-05-10 | 1957-05-10 | Self fill differential collar |
| GB13636/58A GB844106A (en) | 1957-05-10 | 1958-04-29 | Improvements in or relating to devices for filling well casings |
| FR1200874D FR1200874A (fr) | 1957-05-10 | 1958-05-09 | Dispositif de remplissage automatique pour tubage de forage et procédé de remplissage correspondant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US658334A US2846015A (en) | 1957-05-10 | 1957-05-10 | Self fill differential collar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2846015A true US2846015A (en) | 1958-08-05 |
Family
ID=24640814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US658334A Expired - Lifetime US2846015A (en) | 1957-05-10 | 1957-05-10 | Self fill differential collar |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2846015A (de) |
| DE (1) | DE1072935B (de) |
| FR (1) | FR1200874A (de) |
| GB (1) | GB844106A (de) |
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3016954A (en) * | 1957-11-18 | 1962-01-16 | Wendell Coffee | Wire line fishing tool |
| US3107730A (en) * | 1959-08-10 | 1963-10-22 | Schlumberger Well Surv Corp | Sample taking apparatus |
| US3126060A (en) * | 1964-03-24 | L loiacano | ||
| US3376935A (en) * | 1966-01-24 | 1968-04-09 | Halliburton Co | Apparatus for use in wells |
| US3385370A (en) * | 1966-06-29 | 1968-05-28 | Halliburton Co | Self-fill and flow control safety valve |
| US3500911A (en) * | 1967-05-18 | 1970-03-17 | Halliburton Co | Multiple packer distribution valve and method |
| US3999468A (en) * | 1972-12-21 | 1976-12-28 | Caterpillar Tractor Co. | Piston for hydraulic translating unit |
| FR2319837A1 (fr) * | 1975-07-30 | 1977-02-25 | Cook Testing Co | Drainage pour un train de tiges de pompage |
| US4683955A (en) * | 1986-04-30 | 1987-08-04 | Halliburton Company | Automatic fill-up floating apparatus |
| US5647434A (en) * | 1996-03-21 | 1997-07-15 | Halliburton Company | Floating apparatus for well casing |
| US6082459A (en) * | 1998-06-29 | 2000-07-04 | Halliburton Energy Services, Inc. | Drill string diverter apparatus and method |
| US6182766B1 (en) | 1999-05-28 | 2001-02-06 | Halliburton Energy Services, Inc. | Drill string diverter apparatus and method |
| US6508312B1 (en) * | 2002-02-13 | 2003-01-21 | Frank's Casing Crew And Rental Tools, Inc. | Flow control apparatus and method |
| US6571876B2 (en) | 2001-05-24 | 2003-06-03 | Halliburton Energy Services, Inc. | Fill up tool and mud saver for top drives |
| EP1321624A1 (de) * | 2001-12-20 | 2003-06-25 | Halliburton Energy Services, Inc. | Selbst-füllende Zementierschleuse und Verfahren |
| US6651743B2 (en) | 2001-05-24 | 2003-11-25 | Halliburton Energy Services, Inc. | Slim hole stage cementer and method |
| US6820695B2 (en) | 2002-07-11 | 2004-11-23 | Halliburton Energy Services, Inc. | Snap-lock seal for seal valve assembly |
| US20050236154A1 (en) * | 2004-04-22 | 2005-10-27 | Bj Services Company | Isolation assembly for coiled tubing |
| US20060118295A1 (en) * | 2004-12-03 | 2006-06-08 | Rogers Henry E | Diverter tool |
| US20060118336A1 (en) * | 2004-12-03 | 2006-06-08 | Rogers Henry E | Diverter tool |
| US7234522B2 (en) | 2002-12-18 | 2007-06-26 | Halliburton Energy Services, Inc. | Apparatus and method for drilling a wellbore with casing and cementing the casing in the wellbore |
| WO2015054513A1 (en) * | 2013-10-10 | 2015-04-16 | Weatherford/Lamb, Inc. | Piston float equipment |
| RU2641800C1 (ru) * | 2016-09-08 | 2018-01-22 | Закрытое акционерное общество "НГТ" | Переливной клапан бурильной колонны с винтовым забойным двигателем |
| US11261674B2 (en) | 2020-01-29 | 2022-03-01 | Halliburton Energy Services, Inc. | Completion systems and methods to perform completion operations |
| US11333002B2 (en) | 2020-01-29 | 2022-05-17 | Halliburton Energy Services, Inc. | Completion systems and methods to perform completion operations |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4872510A (en) * | 1988-09-30 | 1989-10-10 | Baker Hughes Incorporated | Subterranean well casing float tool |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1715504A (en) * | 1928-08-10 | 1929-06-04 | James L Johnston | Releasable valve |
| US2211846A (en) * | 1937-11-26 | 1940-08-20 | Cicero C Brown | Valve |
-
0
- DE DENDAT1072935D patent/DE1072935B/de active Pending
-
1957
- 1957-05-10 US US658334A patent/US2846015A/en not_active Expired - Lifetime
-
1958
- 1958-04-29 GB GB13636/58A patent/GB844106A/en not_active Expired
- 1958-05-09 FR FR1200874D patent/FR1200874A/fr not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1715504A (en) * | 1928-08-10 | 1929-06-04 | James L Johnston | Releasable valve |
| US2211846A (en) * | 1937-11-26 | 1940-08-20 | Cicero C Brown | Valve |
Cited By (33)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3126060A (en) * | 1964-03-24 | L loiacano | ||
| US3016954A (en) * | 1957-11-18 | 1962-01-16 | Wendell Coffee | Wire line fishing tool |
| US3107730A (en) * | 1959-08-10 | 1963-10-22 | Schlumberger Well Surv Corp | Sample taking apparatus |
| US3376935A (en) * | 1966-01-24 | 1968-04-09 | Halliburton Co | Apparatus for use in wells |
| US3385370A (en) * | 1966-06-29 | 1968-05-28 | Halliburton Co | Self-fill and flow control safety valve |
| US3500911A (en) * | 1967-05-18 | 1970-03-17 | Halliburton Co | Multiple packer distribution valve and method |
| US3999468A (en) * | 1972-12-21 | 1976-12-28 | Caterpillar Tractor Co. | Piston for hydraulic translating unit |
| FR2319837A1 (fr) * | 1975-07-30 | 1977-02-25 | Cook Testing Co | Drainage pour un train de tiges de pompage |
| US4683955A (en) * | 1986-04-30 | 1987-08-04 | Halliburton Company | Automatic fill-up floating apparatus |
| US5647434A (en) * | 1996-03-21 | 1997-07-15 | Halliburton Company | Floating apparatus for well casing |
| US6082459A (en) * | 1998-06-29 | 2000-07-04 | Halliburton Energy Services, Inc. | Drill string diverter apparatus and method |
| US6182766B1 (en) | 1999-05-28 | 2001-02-06 | Halliburton Energy Services, Inc. | Drill string diverter apparatus and method |
| US6651743B2 (en) | 2001-05-24 | 2003-11-25 | Halliburton Energy Services, Inc. | Slim hole stage cementer and method |
| US6571876B2 (en) | 2001-05-24 | 2003-06-03 | Halliburton Energy Services, Inc. | Fill up tool and mud saver for top drives |
| US6810958B2 (en) | 2001-12-20 | 2004-11-02 | Halliburton Energy Services, Inc. | Circulating cementing collar and method |
| EP1321624A1 (de) * | 2001-12-20 | 2003-06-25 | Halliburton Energy Services, Inc. | Selbst-füllende Zementierschleuse und Verfahren |
| US6508312B1 (en) * | 2002-02-13 | 2003-01-21 | Frank's Casing Crew And Rental Tools, Inc. | Flow control apparatus and method |
| USRE41979E1 (en) * | 2002-02-13 | 2010-12-07 | Frank's Casing Crew And Rental Tools, Inc. | Flow control apparatus and method |
| US6820695B2 (en) | 2002-07-11 | 2004-11-23 | Halliburton Energy Services, Inc. | Snap-lock seal for seal valve assembly |
| US7234522B2 (en) | 2002-12-18 | 2007-06-26 | Halliburton Energy Services, Inc. | Apparatus and method for drilling a wellbore with casing and cementing the casing in the wellbore |
| US7243727B2 (en) | 2004-04-22 | 2007-07-17 | Bj Services Company | Isolation assembly for coiled tubing |
| US7134488B2 (en) * | 2004-04-22 | 2006-11-14 | Bj Services Company | Isolation assembly for coiled tubing |
| US20070000665A1 (en) * | 2004-04-22 | 2007-01-04 | Bj Services Company | Isolation assembly for coiled tubing |
| US20050236154A1 (en) * | 2004-04-22 | 2005-10-27 | Bj Services Company | Isolation assembly for coiled tubing |
| US7694732B2 (en) | 2004-12-03 | 2010-04-13 | Halliburton Energy Services, Inc. | Diverter tool |
| US7322432B2 (en) | 2004-12-03 | 2008-01-29 | Halliburton Energy Services, Inc. | Fluid diverter tool and method |
| US20060118336A1 (en) * | 2004-12-03 | 2006-06-08 | Rogers Henry E | Diverter tool |
| US20060118295A1 (en) * | 2004-12-03 | 2006-06-08 | Rogers Henry E | Diverter tool |
| WO2015054513A1 (en) * | 2013-10-10 | 2015-04-16 | Weatherford/Lamb, Inc. | Piston float equipment |
| US9915124B2 (en) | 2013-10-10 | 2018-03-13 | Weatherford Technology Holdings, Llc | Piston float equipment |
| RU2641800C1 (ru) * | 2016-09-08 | 2018-01-22 | Закрытое акционерное общество "НГТ" | Переливной клапан бурильной колонны с винтовым забойным двигателем |
| US11261674B2 (en) | 2020-01-29 | 2022-03-01 | Halliburton Energy Services, Inc. | Completion systems and methods to perform completion operations |
| US11333002B2 (en) | 2020-01-29 | 2022-05-17 | Halliburton Energy Services, Inc. | Completion systems and methods to perform completion operations |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1200874A (fr) | 1959-12-24 |
| GB844106A (en) | 1960-08-10 |
| DE1072935B (de) | 1960-01-14 |
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