US3887006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid retainer setting tool
Assignee: Schlumberger Technology Corp
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Filing: 1974-04-24
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Granted: 1975-06-03
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Expires: 1994-04-24
Abstract
Abstract The invention is a cement retainer setting tool for use with cement slurry or similar liquid retainer devices in a well bore. The setting tool has a centrally disposed elongated mandrel which has one end adapted to be coupled to a string of tubing and a tubular stinger element extending downwardly from the lower end of the mandrel. The lower end of the mandrel has means thereof for coupling a cement retainer thereto. An outer sleeve surrounds the mandrel along most of its length and has left hand threads along its inner surface. An inner sleeve having left handed threads on its outer surface which are coupled to the threads on the outer sleeve is coupled to the mandrel so that rotation of the mandrel rotates the inner sleeve. The inner sleeve also has a circumferential array of bores which contain ball detent elements which extend into a recess of the outer surface of the mandrel except when relative movement between the inner sleeve and the outer sleeve allows the balls to move into a recess in the inner wall of the outer sleeve, thereby permitting slidable downward movement of the mandrel with respect to the outer sleeve.
Inventors
- 👤 Charles A Pitts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:06
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/129; E21B33/1294; E21B23/00; E21B23/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
406 words
A cement retainer setting tool for down hole use in a well bore wherein it is coupled to the lower end of a string of tubing, comprising an elongated hollow mandrel having an upper end and a lower end, an elongated tubular stinger element, said upper end of said mandrel being coupled to said tubing string and said lower end being coupled to one end of said stingeR element, said tubing, mandrel and stinger element being in axial alignment, means adjacent to said lower end of said mandrel for coupling a cement retainer device in swiveling relationship with respect to said mandrel, an outer housing having an outer and inner wall and an upper and lower end, said outer housing surrounding said mandrel in spaced relationship with respect thereto from its lower end part to near its upper end part, said outer housing having an array of left hand threads along its inner wall, said left hand threads being disposed at its upper end part, said outer housing having a recessed inner wall part adjacent to the part of said array of left hand threads which is remote from said upper end of said outer housing, a tubular sleeve having an inner and outer wall and upper end and lower end parts, said sleeve fitting between said mandrel and said outer housing and having an array of left hand threads on said outer surface of said upper end part, said last mentioned threads being coupled to said array of said left hand threads of said outer housing, said tubular sleeve having an array of bores extending therethrough, said bores lying generally along a plane perpendicular with the longitudinal axis of said mandrel, said mandrel having a recessed part adjacent to said bores, said bores each containing a detent element, the thickness of said detent elements being such that they extend from said outer housing into recessed part of said mandrel, said recessed inner wall part of said outer housing being disposed no further from said detent elements than the length of said array of left hand threads, and means mechanically coupling said tubular sleeve to said mandrel whereby right hand rotation of said mandrel rotates said sleeve and said left hand threads thereon to force said outer housing downwardly with respect to said mandrel until said detent elements retract into said recessed inner wall part to permit limited lowering of said mandrel through said outer housing.
Claim 2
Dependent Claim
406 words
A cement retainer setting tool for down hole use in a well bore wherein it is coupled to the lower end of a string of tubing, comprising an elongated hollow mandrel having an upper end and a lower end, an elongated tubular stinger element, said upper end of said mandrel being coupled to said tubing string and said lower end being coupled to one end of said stingeR element, said tubing, mandrel and stinger element being in axial alignment, means adjacent to said lower end of said mandrel for coupling a cement retainer device in swiveling relationship with respect to said mandrel, an outer housing having an outer and inner wall and an upper and lower end, said outer housing surrounding said mandrel in spaced relationship with respect thereto from its lower end part to near its upper end part, said outer housing having an array of left hand threads along its inner wall, said left hand threads being disposed at its upper end part, said outer housing having a recessed inner wall part adjacent to the part of said array of left hand threads which is remote from said upper end of said outer housing, a tubular sleeve having an inner and outer wall and upper end and lower end parts, said sleeve fitting between said mandrel and said outer housing and having an array of left hand threads on said outer surface of said upper end part, said last mentioned threads being coupled to said array of said left hand threads of said outer housing, said tubular sleeve having an array of bores extending therethrough, said bores lying generally along a plane perpendicular with the longitudinal axis of said mandrel, said mandrel having a recessed part adjacent to said bores, said bores each containing a detent element, the thickness of said detent elements being such that they extend from said outer housing into recessed part of said mandrel, said recessed inner wall part of said outer housing being disposed no further from said detent elements than the length of said array of left hand threads, and means mechanically coupling said tubular sleeve to said mandrel whereby right hand rotation of said mandrel rotates said sleeve and said left hand threads thereon to force said outer housing downwardly with respect to said mandrel until said detent elements retract into said recessed inner wall part to permit limited lowering of said mandrel through said outer housing.
Claim 3
Dependent Claim
406 words
A cement retainer setting tool for down hole use in a well bore wherein it is coupled to the lower end of a string of tubing, comprising an elongated hollow mandrel having an upper end and a lower end, an elongated tubular stinger element, said upper end of said mandrel being coupled to said tubing string and said lower end being coupled to one end of said stingeR element, said tubing, mandrel and stinger element being in axial alignment, means adjacent to said lower end of said mandrel for coupling a cement retainer device in swiveling relationship with respect to said mandrel, an outer housing having an outer and inner wall and an upper and lower end, said outer housing surrounding said mandrel in spaced relationship with respect thereto from its lower end part to near its upper end part, said outer housing having an array of left hand threads along its inner wall, said left hand threads being disposed at its upper end part, said outer housing having a recessed inner wall part adjacent to the part of said array of left hand threads which is remote from said upper end of said outer housing, a tubular sleeve having an inner and outer wall and upper end and lower end parts, said sleeve fitting between said mandrel and said outer housing and having an array of left hand threads on said outer surface of said upper end part, said last mentioned threads being coupled to said array of said left hand threads of said outer housing, said tubular sleeve having an array of bores extending therethrough, said bores lying generally along a plane perpendicular with the longitudinal axis of said mandrel, said mandrel having a recessed part adjacent to said bores, said bores each containing a detent element, the thickness of said detent elements being such that they extend from said outer housing into recessed part of said mandrel, said recessed inner wall part of said outer housing being disposed no further from said detent elements than the length of said array of left hand threads, and means mechanically coupling said tubular sleeve to said mandrel whereby right hand rotation of said mandrel rotates said sleeve and said left hand threads thereon to force said outer housing downwardly with respect to said mandrel until said detent elements retract into said recessed inner wall part to permit limited lowering of said mandrel through said outer housing.
Claim 4
Dependent Claim
406 words
A cement retainer setting tool for down hole use in a well bore wherein it is coupled to the lower end of a string of tubing, comprising an elongated hollow mandrel having an upper end and a lower end, an elongated tubular stinger element, said upper end of said mandrel being coupled to said tubing string and said lower end being coupled to one end of said stingeR element, said tubing, mandrel and stinger element being in axial alignment, means adjacent to said lower end of said mandrel for coupling a cement retainer device in swiveling relationship with respect to said mandrel, an outer housing having an outer and inner wall and an upper and lower end, said outer housing surrounding said mandrel in spaced relationship with respect thereto from its lower end part to near its upper end part, said outer housing having an array of left hand threads along its inner wall, said left hand threads being disposed at its upper end part, said outer housing having a recessed inner wall part adjacent to the part of said array of left hand threads which is remote from said upper end of said outer housing, a tubular sleeve having an inner and outer wall and upper end and lower end parts, said sleeve fitting between said mandrel and said outer housing and having an array of left hand threads on said outer surface of said upper end part, said last mentioned threads being coupled to said array of said left hand threads of said outer housing, said tubular sleeve having an array of bores extending therethrough, said bores lying generally along a plane perpendicular with the longitudinal axis of said mandrel, said mandrel having a recessed part adjacent to said bores, said bores each containing a detent element, the thickness of said detent elements being such that they extend from said outer housing into recessed part of said mandrel, said recessed inner wall part of said outer housing being disposed no further from said detent elements than the length of said array of left hand threads, and means mechanically coupling said tubular sleeve to said mandrel whereby right hand rotation of said mandrel rotates said sleeve and said left hand threads thereon to force said outer housing downwardly with respect to said mandrel until said detent elements retract into said recessed inner wall part to permit limited lowering of said mandrel through said outer housing.
Claim 5
Dependent Claim
28 words
A tool in accordance with claim 1 wherein said stinger element is adapted to extend into and at least contact a valve actuator in said cement retainer device.
Claim 6
Dependent Claim
22 words
A tool in accordance with claim 1 wherein said outer housing has an array of drag springs coupled to its outer wall.
Claim 7
Dependent Claim
19 words
A tool in accordance with claim 1 wherein said tubular sleeve is coupled to said mandrel by key means.
Claim 8
Dependent Claim
14 words
A tool in accordance with claim 1 wherein said detent elements are ball elements.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |