公开(公告)号：FR2561708B1

公开(公告)日：1988-12-30

申请号：FR8501355

申请日：1985-01-31

Applicant: GEOSOURCE INC

Inventor： BOGARD EDWARD L

IPC: E21B17/10 ,  E21B23/04 ,  E21B23/02 ,  E21B47/09

Abstract: A clamping apparatus for locking tools in a well is disclosed. A first piston sealably engages a hollow body member to form a chamber, which is filled with a working fluid. A bias member or spring moves the first piston, extending a clamping arm connected to the first piston against the well wall. A second piston is sealably engaged in a bore in the first piston; the bore is in fluid communication with the chamber. The second piston is driven into the bore by a motor, increasing the pressure in the chamber through a passage in the first piston between the bore and the chamber. This increased pressure further urges the first piston and locks the clamping arm against the well wall. The hydraulic pressure is released, and the clamping arm is unlocked, by opening a valve in a line between the chamber and a reservoir. The clamping arm is retracted by driving the second piston into the bore into contact with the first piston, forcing the first piston back against the spring.

公开(公告)号：GB2153413A

公开(公告)日：1985-08-21

申请号：GB8502510

申请日：1985-01-31

Applicant: GEOSOURCE INC

Inventor： BOGARD EDWARD L

IPC: E21B17/10 ,  E21B23/04 ,  E21B47/00

Abstract: A clamping apparatus for locking tools in a well includes a first piston 32 sealably engaging a hollow body member 20 to form a chamber 36, which is filled with a working fluid. A bias member or spring 39 moves the first piston 32, extending a clamping arm 12 connected to the first piston 32 against the well wall. A second piston 28 is sealably engaged in a bore 30 in the first piston 32; the bore 30 is in fluid communication with the chamber 36. The second piston 28 is driven into the bore 30 by a motor 22, increasing the pressure in the chamber 36 through a passage 38 in the first piston 32 between the bore 30 and the chamber 36. This increased pressure further urges the first piston 32 and locks the clamping arm 12 against the well wall. The hydraulic pressure is released, and the clamping arm 12 is unlocked, by opening a valve 46 in a line 47 between the chamber 36 and a reservoir 45. The clamping arm 12 is retracted by driving the second piston 28 into the bore 30 into contact with the first piston 32 forcing the first piston 32 back against the spring 39.

公开(公告)号：FR2561708A1

公开(公告)日：1985-09-27

申请号：FR8501355

申请日：1985-01-31

Applicant: GEOSOURCE INC

Inventor： BOGARD EDWARD L

IPC: E21B17/10 ,  E21B23/04 ,  E21B23/02 ,  E21B47/09

Abstract: A clamping apparatus for locking tools in a well is disclosed. A first piston sealably engages a hollow body member to form a chamber, which is filled with a working fluid. A bias member or spring moves the first piston, extending a clamping arm connected to the first piston against the well wall. A second piston is sealably engaged in a bore in the first piston; the bore is in fluid communication with the chamber. The second piston is driven into the bore by a motor, increasing the pressure in the chamber through a passage in the first piston between the bore and the chamber. This increased pressure further urges the first piston and locks the clamping arm against the well wall. The hydraulic pressure is released, and the clamping arm is unlocked, by opening a valve in a line between the chamber and a reservoir. The clamping arm is retracted by driving the second piston into the bore into contact with the first piston, forcing the first piston back against the spring.

公开(公告)号：DE3503454A1

公开(公告)日：1985-08-08

申请号：DE3503454

申请日：1985-02-01

Applicant: GEOSOURCE INC

Inventor： BOGARD EDWARD L

IPC: E21B17/10 ,  E21B23/04

Abstract: A clamping apparatus for locking tools in a well is disclosed. A first piston sealably engages a hollow body member to form a chamber, which is filled with a working fluid. A bias member or spring moves the first piston, extending a clamping arm connected to the first piston against the well wall. A second piston is sealably engaged in a bore in the first piston; the bore is in fluid communication with the chamber. The second piston is driven into the bore by a motor, increasing the pressure in the chamber through a passage in the first piston between the bore and the chamber. This increased pressure further urges the first piston and locks the clamping arm against the well wall. The hydraulic pressure is released, and the clamping arm is unlocked, by opening a valve in a line between the chamber and a reservoir. The clamping arm is retracted by driving the second piston into the bore into contact with the first piston, forcing the first piston back against the spring.

公开(公告)号：CA1227128A

公开(公告)日：1987-09-22

申请号：CA472543

申请日：1985-01-22

Applicant: GEOSOURCE INC

Inventor： BOGARD EDWARD L

IPC: E21B17/10 ,  E21B23/04 ,  E21B23/00

Abstract: WELL TOOL LOCKING APPARATUS A clamping apparatus for locking tools in a well is disclosed. A first piston sealable engages a hollow body member to form a chamber, which is filled with a working fluid. A bias member or spring moves the first piston, extending a clamping arm connected to the first piston against the well wall. A second piston is sealable engaged in a bore in the first piston; the bore is in fluid communication with the chamber. The second piston is driven into the bore by a motor, increasing the pressure in the chamber through a passage in the first piston between the bore and the chamber. This increased pressure further urges the first piston and locks the clamping arm against the well wall. The hydraulic pressure is released, and the clamping arm is unlocked, by opening a valve in a line between the chamber and a reservoir. The clamping arm is retracted by driving the second piston into the bore into contact with the first piston, forcing the first piston back against the spring.

公开(公告)号：GB2153413B

公开(公告)日：1987-02-25

申请号：GB8502510

申请日：1985-01-31

Applicant: GEOSOURCE INC

Inventor： BOGARD EDWARD L

IPC: E21B17/10 ,  E21B23/04 ,  E21B47/00

Abstract: A clamping apparatus for locking tools in a well is disclosed. A first piston sealably engages a hollow body member to form a chamber, which is filled with a working fluid. A bias member or spring moves the first piston, extending a clamping arm connected to the first piston against the well wall. A second piston is sealably engaged in a bore in the first piston; the bore is in fluid communication with the chamber. The second piston is driven into the bore by a motor, increasing the pressure in the chamber through a passage in the first piston between the bore and the chamber. This increased pressure further urges the first piston and locks the clamping arm against the well wall. The hydraulic pressure is released, and the clamping arm is unlocked, by opening a valve in a line between the chamber and a reservoir. The clamping arm is retracted by driving the second piston into the bore into contact with the first piston, forcing the first piston back against the spring.