Patent US4310892A successfully refreshed from Google Patents.
US4715440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Downhole tools
Assignee: Gearhart Tesel Ltd
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Filing: 1986-07-14
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Granted: 1987-12-29
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Expires: 2006-07-14
Abstract
Abstract A tool for use downhole has an elongate body, arms movably mounted on the body and means for controlling movement of the arms between an operational position and a retracted position. Movement of the arms is controlled by a motor and a transmission, according to one aspect of the invention the arms being suspended independently of one another and in a second aspect of the invention, movement of the arms being controllable remotely from the tool.
Inventors
- 👤 Timothy G. Boxell
- 👤 Frank B. Bardsley
- 👤 David E. Stoddart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:33
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/10; E21B17/1014; E21B17/1021
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
103 words
A tool for use downhole comprising an elongate body, a plurality of arm means movably mounted on the body, and means for controlling movement of the arm means between an operational position in which the arm means extend outwardly with respect to the body and a retracted position, the arm means movement controlling means comprising a motor, presser means movable rectilinearly in response to operation of the motor and independent resilient means located between said presser means and each of said arm means for permitting independent movement of said arm means in response to force exerted on said arm means by surrounding material.
Claim 2
Dependent Claim
103 words
A tool for use downhole comprising an elongate body, a plurality of arm means movably mounted on the body, and means for controlling movement of the arm means between an operational position in which the arm means extend outwardly with respect to the body and a retracted position, the arm means movement controlling means comprising a motor, presser means movable rectilinearly in response to operation of the motor and independent resilient means located between said presser means and each of said arm means for permitting independent movement of said arm means in response to force exerted on said arm means by surrounding material.
Claim 3
Dependent Claim
25 words
A tool as claimed in claim 1 including transmission means for translating rotational drive of the motor into rectilinear movement for moving said arm means.
Claim 4
Dependent Claim
27 words
A tool as claimed in claim 2 wherein the transmission means includes a torque limiter for providing a limit on the torque transmitted through the transmission means.
Claim 5
Dependent Claim
81 words
A tool as claimed in claim 2 wherein the transmission means further comprises a shaft extending from the motor through the elongate body, the shaft having an externally threaded portion carrying an internally threaded block member, and means connecting the block member and the presser means, whereby rotation of the shaft by the motor causes the block member to move rectilinearly on the shaft, the rectilinear movement of the block member being transmitted to the presser means by the connecting means.
Claim 6
Dependent Claim
22 words
A tool as claimed in claim 2 comprising potentiometer means for measuring the displacement between the presser means and the elongate body.
Claim 7
Dependent Claim
19 words
A tool as claimed in claim 2 wherein the transmission means are maintained in transmission fluid at external pressure.
Claim 8
Dependent Claim
36 words
A tool as claimed in claim 6 including a movable compensating piston movable in the tool body with transmission fluid on one side thereof and the other side thereof being exposed to material outside the tool.
Claim 9
Dependent Claim
19 words
A tool as claimed in claim 1 wherein the motor is located at one end of the elongate body.
Claim 10
Dependent Claim
22 words
A tool as claimed in claim 2 wherein each arm means is connected to the transmission means by a shearable, pivotal connection.
Claim 11
Dependent Claim
16 words
A tool as claimed in claim 9 wherein each shearable, pivotal connection is a shear pin.
Claim 12
Dependent Claim
23 words
A tool as claimed in claim 1 comprising potentiometer means for measuring the displacement of the arm means relative to the elongate body.
Claim 13
Dependent Claim
13 words
A tool as claimed in claim 1 comprising a multiplicity of arm means.
Claim 14
Dependent Claim
11 words
A tool as claimed in claim 12 comprising six arm means.
Claim 15
Dependent Claim
44 words
A tool as claimed in claim 1 wherein each arm means comprises a parallelogram linkage comprising a pair of parallel arm elements pivotally mounted on the body and a sensor carrying element extending between the arm elements at or adjacent the free ends thereof.
Claim 16
Dependent Claim
17 words
A tool as claimed in claim 14 wherein the arm means are capable of carrying different sensors.
Claim 17
Dependent Claim
34 words
A tool as claimed in claim 14 wherein each sensor carrying element is pivotally mounted on the associated arm for pivotal movement about an axis parallel to the axis of the elongate tool body.
Claim 18
Dependent Claim
30 words
A tool as claimed in claim 14 wherein each sensor carrying element includes one or more scratcher elements lying proud of the outwardly facing surface of the sensor carrying element.
Claim 19
Dependent Claim
95 words
A tool for use downhole comprising an elongate body, a plurality of arm means movable mounted on the body, means for controlling movement of the arm means between an operational position in which the arm means extend outwardly with respect to the body and a retracted position, and means for controlling the resistance of the arm means to movement from the operational position towards the retracted position, said resistance controlling means being operable by an operator remote from the tool whereby adjustment of said arm means resistance can be carried out with the tool downhole.
Claim 20
Dependent Claim
95 words
A tool for use downhole comprising an elongate body, a plurality of arm means movable mounted on the body, means for controlling movement of the arm means between an operational position in which the arm means extend outwardly with respect to the body and a retracted position, and means for controlling the resistance of the arm means to movement from the operational position towards the retracted position, said resistance controlling means being operable by an operator remote from the tool whereby adjustment of said arm means resistance can be carried out with the tool downhole.
Claim 21
Dependent Claim
23 words
A tool as claimed in claim 18 wherein the means for controlling movement of the arm means comprises a motor and transmission means.
Claim 22
Dependent Claim
25 words
A tool as claimed in claim 19 wherein the transmission means translates rotational drive of the motor into rectilinear movement for moving said arm means.
Claim 23
Dependent Claim
26 words
A tool as claimed in claim 20 wherein the transmission includes a torque limiter for providing a limit on the torque transmitted through the transmission means.
Claim 24
Dependent Claim
66 words
A tool as claimed in claim 19 wherein the transmission means includes presser means movable rectilinearly in response to operation of the motor, and spring means acted on by said presser means, there being a spring means associated with each arm means, and each spring means exerting a force on the associated arm means dependent on the positions of the presser means and the arm means.
Claim 25
Dependent Claim
81 words
A tool as claimed in claim 22 wherein the transmission means further comprises a shaft extending from the motor through the elongate body, the shaft having an externally threaded portion carrying an internally threaded block member, and means connecting the block member and the presser means, whereby rotation of the shaft by the motor causes the block member to move rectilinearly on the shaft, the rectilinear movement of the block member being transmitted to the presser means by the connecting means.
Claim 26
Dependent Claim
22 words
A tool as claimed in claim 22 comprising potentiometer means for measuring the displacement between the presser means and the elongate body.
Claim 27
Dependent Claim
19 words
A tool as claimed in claim 19 wherein the transmission means are maintained in transmission fluid at external pressure.
Claim 28
Dependent Claim
36 words
A tool as claimed in claim 25 including a movable compensating piston movable in the tool body with transmission fluid on one side thereof and the other side thereof being exposed to material outside the tool.
Claim 29
Dependent Claim
19 words
A tool as claimed in claim 19 wherein the motor is located at one end of the elongate body.
Claim 30
Dependent Claim
22 words
A tool as claimed in claim 19 wherein each arm means is connected to the transmission means by a shearable, pivotal connection.
Claim 31
Dependent Claim
16 words
A tool as claimed in claim 28 wherein each shearable, pivotal connection is a shear pin.
Claim 32
Dependent Claim
23 words
A tool as claimed in claim 18 comprising potentiometer means for measuring the displacement of the arm means relative to the elongate body.
Claim 33
Dependent Claim
13 words
A tool as claimed in claim 18 comprising a multiplicity of arm means.
Claim 34
Dependent Claim
11 words
A tool as claimed in claim 31 comprising six arm means.
Claim 35
Dependent Claim
44 words
A tool as claimed in claim 18 wherein each arm means comprises a parallelogram linkage comprising a pair of parallel arm elements pivotally mounted on the body and a sensor carrying element extending between the arm elements at or adjacent the free ends thereof.
Claim 36
Dependent Claim
17 words
A tool as claimed in claim 33 wherein the arm means are capable of carrying different sensors.
Claim 37
Dependent Claim
34 words
A tool as claimed in claim 33 wherein each sensor carrying element is pivotally mounted on the associated arm for pivotal meovement about an axis parallel to the axis of the elongate tool body.
Claim 38
Dependent Claim
30 words
A tool as claimed in claim 33 wherein each sensor carrying element includes one or more scratcher elements lying proud of the outwardly facing surface of the sensor carrying element.
References Cited (Backward Citations)
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GB1415447A
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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) | 1990-12-28 | 1991-06-29 | 1991-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-28 | 1995-06-29 | 1995-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-28 | 1999-06-29 | 1999-12-29 | $7700.00 | Window Closed / Lapsed |