US4365668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Side wall clamp for downhole tools
Assignee: BP Corp North America Inc
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Filing: 1981-03-11
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Granted: 1982-12-28
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Expires: 2001-03-11
Abstract
Abstract A side wall clamp is disclosed for use in conjunction with downhole tools, the clamp having a fail-safe mechanism which permits unclamping of the tool from the bore hole wall even if the clamp actuator means is inoperative, by exerting upward pull on the wire line or drill string to which the tool is attached.
Inventors
- 👤 Gary R. Bright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:56
CPC Classifications
G; G01; G01V; G01V11/00; G01V11/002; G01V11/005; E; E21; E21B; E21B23/00; E21B23/01
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
165 words
In a downhole tool, a side wall clamping apparatus comprising an arm having means at one end for engaging the opposite side of the bore hole from said tool, a rotator supporting the other end of said arm, a rotary link pivotally connected to a fixed portion of said tool and pivotally connected to said rotator, actuator means carried by said tool and pivotally connected to said rotator at a point remote from the point of connection of the rotary link whereby movement of said actuator means causes movement of said rotator and the arm carried thereby, said arm and said rotator each having normally abutting surfaces which together constitute a sear holding said arm in fixed position with respect to said rotator, and spring means interconnected between an element of said tool and said arm for maintaining said surfaces in abutting relationship except when said tool is moved upwardly relative to said arm overcoming the force exerted by said spring and disengaging said sear.
Claim 2
Dependent Claim
165 words
In a downhole tool, a side wall clamping apparatus comprising an arm having means at one end for engaging the opposite side of the bore hole from said tool, a rotator supporting the other end of said arm, a rotary link pivotally connected to a fixed portion of said tool and pivotally connected to said rotator, actuator means carried by said tool and pivotally connected to said rotator at a point remote from the point of connection of the rotary link whereby movement of said actuator means causes movement of said rotator and the arm carried thereby, said arm and said rotator each having normally abutting surfaces which together constitute a sear holding said arm in fixed position with respect to said rotator, and spring means interconnected between an element of said tool and said arm for maintaining said surfaces in abutting relationship except when said tool is moved upwardly relative to said arm overcoming the force exerted by said spring and disengaging said sear.
Claim 3
Dependent Claim
33 words
The side wall clamping apparatus as described in claim 1 wherein the means for engaging the opposite side of the bore hole in a shoe pivotally mounted on the end of said arm.
Claim 4
Dependent Claim
158 words
In a downhole tool, a side wall clamping apparatus comprising: an arm having means at one end for engaging the opposite side of the bore hole from said tool, a rotator supporting the other end of said arm, a rotary link pivotally connected to a fixed portion of said tool and pivotally connected to said rotator, actuator means carried by said tool and pivotally connected to said rotator at a point remote from the point of connection of the rotary link wherey movement of said actuator means effects rotation of said rotator and the arm carried thereby, said arm and said rotator each having normally abutting surfaces which together constitute a sear holding said arm in extended position with respect to said rotator, and elastic means interconnected between an element of said tool and said arm for maintaining said surfaces in abutting relationship except when said tool is moved upwardly relative to said arm to release the sear.
Claim 5
Dependent Claim
158 words
In a downhole tool, a side wall clamping apparatus comprising: an arm having means at one end for engaging the opposite side of the bore hole from said tool, a rotator supporting the other end of said arm, a rotary link pivotally connected to a fixed portion of said tool and pivotally connected to said rotator, actuator means carried by said tool and pivotally connected to said rotator at a point remote from the point of connection of the rotary link wherey movement of said actuator means effects rotation of said rotator and the arm carried thereby, said arm and said rotator each having normally abutting surfaces which together constitute a sear holding said arm in extended position with respect to said rotator, and elastic means interconnected between an element of said tool and said arm for maintaining said surfaces in abutting relationship except when said tool is moved upwardly relative to said arm to release the sear.
Claim 6
Dependent Claim
116 words
In a downhole tool, a side wall clamping apparatus comprising an arm having means at one end for engaging the opposite side of the bore hole from said tool, a rotator element supporting the other end of said arm, actuator means carried by said tool and connected to said rotator whereby movement of said actuator means causes movement of said rotator and the arm carried thereby, said arm and said rotator each having normally abutting surfaces which together constitute a sear holding said arm in extended position with respect to said rotator, and means for maintaining said surfaces in abutting relationship except when said tool is moved upwardly relative to said arm to release the sear.
Claim 7
Dependent Claim
116 words
In a downhole tool, a side wall clamping apparatus comprising an arm having means at one end for engaging the opposite side of the bore hole from said tool, a rotator element supporting the other end of said arm, actuator means carried by said tool and connected to said rotator whereby movement of said actuator means causes movement of said rotator and the arm carried thereby, said arm and said rotator each having normally abutting surfaces which together constitute a sear holding said arm in extended position with respect to said rotator, and means for maintaining said surfaces in abutting relationship except when said tool is moved upwardly relative to said arm to release the sear.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-12-27 | 1986-06-28 | 1986-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-27 | 1990-06-28 | 1990-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-27 | 1994-06-28 | 1994-12-28 | $7700.00 | Window Closed / Lapsed |