US3664416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wireline well tool anchoring system
Assignee: Schlumberger Technology Corp
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Filing: 1970-06-01
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Granted: 1972-05-23
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Expires: 1990-06-01
Abstract
Abstract An illustrative embodiment of the present invention includes apparatus for use in anchoring a probe in a well bore. The apparatus includes a body member which is attached to the upper part of the probe. A ballast weight is telescopically mounted on the body member and is attached to the wireline cable for operating the device. Movement of the ballast weight is amplified by a force multiplying hydraulic system and utilized to spread anchoring means outwardly against the wall of the well bore. A surface-actuated solenoid control valve may be utilized to control the anchoring system.
Inventors
- 👤 Yvea Nicolas
- 👤 Jean-Loup Bonnet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:06
CPC Classifications
G; G01; G01V; G01V11/00; G01V11/002; G01V11/005; E; E21; E21B; E21B23/00; E21B23/01
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
119 words
An anchoring system for use with a wireline well tool comprising: a body sized for passage in a well bore and adapted for coupling to a well tool; weight means vertically slidably mounted on said body; wall-engaging anchoring means pivotally coupled to said body and adapted to move outwardly in relation to said body member; force-multiplying hydraulic means coupled between said weight means and said anchoring means and adapted for transmitting forces developed by movement of said weight means to said anchoring means, whereby a vertical movement of said weight means in relation to said body causes an outward movement of said anchoring means in relation to said body; and selectively operable valve means for deactivating said hydraulic means.
Claim 2
Dependent Claim
119 words
An anchoring system for use with a wireline well tool comprising: a body sized for passage in a well bore and adapted for coupling to a well tool; weight means vertically slidably mounted on said body; wall-engaging anchoring means pivotally coupled to said body and adapted to move outwardly in relation to said body member; force-multiplying hydraulic means coupled between said weight means and said anchoring means and adapted for transmitting forces developed by movement of said weight means to said anchoring means, whereby a vertical movement of said weight means in relation to said body causes an outward movement of said anchoring means in relation to said body; and selectively operable valve means for deactivating said hydraulic means.
Claim 3
Dependent Claim
84 words
The apparatus of claim 8 wherein said hydraulic means include: a first chamber closed by a control piston of relatively small cross-sectional area and coupled to said weight means and joined by a fluid passage to a second chamber closed by a slave piston of relatively larger cross-sectional area and coupled to said anchoring means; and wherein said selectively operable valve means include a solenoid-operated valve disposed in said fluid passage between said chambers and adapted for selectively opening and closing said fluid passage.
Claim 4
Dependent Claim
52 words
The apparatus of claim 2 wherein the ratio of cross-sectional areas of said slave piston and said control piston is chosen to be greater than 8 so that the weight of said weight means is of the same order of magnitude as the weight of a well tool attached to said body.
Claim 5
Dependent Claim
53 words
The apparatus of claim 2 further including: spring means operable to hold said solenoid-operated valve normally closed, the force constant of said spring being chosen so that said solenoid-operated valve will open when the pressure of a hydraulic fluid in said second chamber exceeds that of a hydraulic fluid in said first chamber.
Claim 6
Dependent Claim
132 words
A well tool adapted for suspension in a well bore from a suspension cable and comprising: a body; ballast means adapted for connection to a suspension cable and slidably mounted on said body for upward and downward movements thereon in response to corresponding movements of a suspension cable coupled to said ballast means; anchoring means operatively arranged on said body and including at least one wall-engaging member movably coupled to said body and adapted for lateral movements back and forth in relation to said body; and hydraulic means cooperativelY interconnecting said wall-engaging member and said ballast means and adapted for selectively moving said wall-engaging member into and out of anchoring engagement with a well bore wall in response to said upward and downward movements of said ballast means relative to said body.
Claim 7
Dependent Claim
132 words
A well tool adapted for suspension in a well bore from a suspension cable and comprising: a body; ballast means adapted for connection to a suspension cable and slidably mounted on said body for upward and downward movements thereon in response to corresponding movements of a suspension cable coupled to said ballast means; anchoring means operatively arranged on said body and including at least one wall-engaging member movably coupled to said body and adapted for lateral movements back and forth in relation to said body; and hydraulic means cooperativelY interconnecting said wall-engaging member and said ballast means and adapted for selectively moving said wall-engaging member into and out of anchoring engagement with a well bore wall in response to said upward and downward movements of said ballast means relative to said body.
Claim 8
Dependent Claim
78 words
The well tool of claim 5 wherein said hydraulic means include: first and second piston means respectively arranged in first and second piston chambers and coupled to said ballast means and to said wall-engaging member, and fluid passage means interconnecting said first and second piston chambers; and further including selectively operable valve means adapted for controlling fluid communication through said fluid passage means in response to signals from the surface to selectively activate and deactivate said hydraulic means.
Claim 9
Dependent Claim
93 words
The well tool of claim 5 wherein said hydraulic means include: a first piston chamber slidably receiving a first piston member and operatively arranged between said ballast means and said body for developing increased hydraulic pressures upon downward movement of said ballast means in relation to said body, a second piston chamber slidably receiving a second piston member and operatively arranged between said body and said wall-engaging member for extending said wall-engaging member outwardly in response to increased hydraulic pressures in said second piston chamber, and a fluid conduit interconnecting said piston chambers.
Claim 10
Dependent Claim
44 words
The well tool of claim 7 further including: a solenoid-actuated valve cooperatively arranged in said fluid conduit and adapted for controlling fluid communication therethrough in response to electrical signals transmitted from the surface by way of a suspension cable connected to said ballast means.
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) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |