Down-hole adjustable hydraulic fishing jar

Claim 2

In a hydraulic fishing jar adapted to be run into a well on a fishing string and connected to a fish in the well bore, inner and outer elongated bodies telescopically interengaged, means defining between said bodies a hydraulic fluid chamber, compression piston means in said chamber operable upon telescopic movement of said bodies in one direction to compress the hydraulic fluid in said chamber, valve means in said chamber including means providing a by-pass flow passage, a valve member for normally closing said flow passage and shiftable to an open position at which said compressed hydraulic fluid is released to said flow passage, trigger means responsive to tensioning of said fishing string to compress the hydraulic fluid in said chamber for moving said valve member to said open position, and hammer and anvil means on said bodies movable into engagement by the tension in said fishing string when said valve member is moved to said open position.

Claim 3

In a hydraulic fishing jar as defined in claim 1, means adjustably positioning said trigger means with respect to said valve member for adjusting the maximum tension applicable to said fishing string.

Claim 4

In a hydraulic fishing jar as defined in claim 1, means adjustably positioning said trigger means with respect to said valve member for adjusting the maximum tension applicable to said fishing string, and means responsive to manipulation of said fishing string for adjusting the position of said trigger means.

Claim 5

In a hydraulic fishing jar as defined in claim 1, means adjustably positioning said trigger means with respect to said valve member for adjusting the maximum tension applicable to said fishing string, and means responsive to manipulation of said fishing string for adjusting the position of said trigger means, including holding means engageable for connecting said trigger means to one of said bodies and releasable upon rotation of said trigger means relative to said one of said bodies, and the other of said bodies and said trigger means having means for rotating said trigger means responsive to relative telescopic movement of said bodies.

Claim 6

In a hydraulic fishing jar as defined in claim 1, means adjustably positioning said trigger means with respect to said valve member for adjusting the maximum tension applicable to said fishing string, and means responsive to manipulation of said fishing string for adjusting the position of said trigger means, including holding means engageable for connecting said trigger means to one of said bodies and releasable upon relative rotation of said trigger means relative to said one of said bodies, the other of said bodies and said trigger means having means for rotating said trigger means responsive to relative telescopic movement of said bodies, and Means for moving said trigger means to adjusted positions with respect to said one of said bodies and said valve member when said trigger means is released from said one of said bodies.

Claim 7

In a hydraulic fishing jar as defined in claim 1, said trigger means and one of said bodies having coengageable holding means releasable to permit adjustment of said trigger means with respect to said one of said bodies and said valve member, and means for moving said trigger means to adjusted positions determined by tension applied to the fishing string.

Claim 8

In a hydraulic fishing jar as defined in claim 1, said trigger means comprising a tubular member rotatable relative to said bodies, said member and one of said bodies having opposed angularly spaced ribbed and unribbed portions, said ribbed portions being engageable and releasable upon rotation of said member, the other of said bodies and said member having means responsive to relative telescoping of said bodies for rotating said member.

Claim 9

In a hydraulic fishing jar as defined in claim 1, said trigger means comprising a tubular member rotatable relative to said bodies, said member and one of said bodies having opposed angularly spaced ribbed and unribbed portions, said ribbed portions being engageable and releasable upon rotation of said member, the other of said bodies and said member having means responsive to relative telescoping of said bodies for rotating said member, and means for moving said member longitudinally of said one of said bodies when said ribbed portions are released for re-engagement of said ribbed portions at a location spaced longitudinally of said one of said bodies.

Claim 10

In a hydraulic fishing jar as defined in claim 1, said trigger means comprising a tubular member rotatable relative to said bodies, said member and one of said bodies having opposed angularly spaced ribbed and unribbed portions, said ribbed portions being engageable and releasable upon rotation of said member, the other of said bodies and said member having means responsive to relative telescoping of said bodies for rotating said member, and means for moving said member longitudinally of said one of said bodies when said ribbed portions are released for re-engagement of said ribbed portions at a location spaced longitudinally of said one of said bodies in response to telescopic movement of said bodies.

Claim 11

In a hydraulic fishing jar as defined in claim 1, said trigger means comprising a tubular member rotatable relative to said bodies, said member and one of said bodies having opposed angularly spaced ribbed and unribbed portions, said ribbed portions being engageable and releasable upon rotation of said member, the other of said bodies and said member having means responsive to relative telescoping of said bodies for rotating said member, and means for moving said member longitudinally of said one of said bodies when said ribbed portions are released for re-engagement of said ribbed portions at a location spaced longitudinally of said one of said bodies in response to telescopic movement of said bodies and depending upon the magnitude of compression of said hydraulic fluid.

Claim 12

In a hydraulic fishing jar as defined in claim 1, said trigger means comprising a tubular member rotatable relative to said bodies, said member and one of said bodies having opposed angularly spaced ribbed and unribbed portions, said ribbed portions being engageable and releasable upon rotation of said member, the other of said bodies and said member having means responsive to relative telescoping of said bodies for rotating said member, and means for moving said member longitudinally of said one of said bodies when said ribbed portions are released for re-engagement of said ribbed portions at a location spaced longitudinally of said one of said bodies, said ribbed portions comprising threaded segments.

Claim 13

In a hydraulic fishing jar as defined in claim 1, said trigger means comprising a tubular member rotatable relative to said bodies, said member and one of said bodies having opposed angularly spaced ribbed and unribbed portions, said ribbed portions being engageable and releasable upon rotation of said member, the other of said bodies and said member having means responsive to relative telescoping of said bodies for rotating said member, and including ratchet means for holding said member in position for re-engagement of said ribbed portions at adjusted longitudinally spaced locations.

Claim 14

In a hydraulic fishing jar as defined in claim 1, said trigger means comprising a tubular member rotatable relative to said bodies, said member and one of said bodies having opposed angularly spaced ribbed and unribbed portions, said ribbed portions being engageable and releasable upon rotation of said member, the other of said bodies and said member having means responsive to relative telescoping of said bodies for rotating said member, and including ratchet means for holding said member in position for re-engagement of said ribbed portions at adjusted longitudinally spaced locations, said ratchet means including resilient ratchet arms complemental to said ribbed portions.

Claim 15

In a hydraulic fishing jar as defined in claim 1, said trigger means comprising a tubular member rotatable relative to said bodies, said member and one of said bodies having opposed angularly spaced ribbed and unribbed portions, said ribbed portions being engageable and releasable upon rotation of said member, the other of said bodies and said member having means responsive to relative telescoping of said bodies for rotating said member, and means for moving said member longitudinally of said one of said bodies when said ribbed portions are released for re-engagement of said ribbed portions at a location spaced longitudinally of said one of said bodies, including a spring normally biasing said member in one direction, and means movable with one of said bodies into engagement with said member to move the latter in the other direction.

Claim 16

In a hydraulic fishing jar as defined in claim 1, said trigger means comprising a tubular member rotatable relative to said bodies, said member and one of said bodies having opposed angularly spaced ribbed and unribbed portions, said ribbed portions being engageable and releasable upon rotation of said member, the other of said bodies and said member having means responsive to relative telescoping of said bodies for rotating said member, means for moving said member longitudinally of said one of said bodies when said ribbed portions are released for re-engagement of said ribbed portions at a location spaced longitudinally of said one of said bodies, including a spring normally biasing said member in one direction, and means including said valve member movable with one of said bodies into engagement with said trigger member to move the latter in the other direction in response to telescopic movement of said bodies.

Claim 17

In a hydraulic fishing jar as defined in claim 1, said means defining said hydraulic fluid chamber comprising upper and lower seal means between said bodies, one of said seal means being a floating piston for compensating for the pressure of fluid in the well.

Claim 18

In a hydraulic fishing jar as defined in claim 1, said compression piston means comprising an annular piston between said bodies and having a peripheral wall spaced from one of said bodies to provide a fluid passage, and including valve means carried by said one of said bodies to close said passage upon telescopic movement of said bodies.

Claim 19

In a hydraulic jar adapted to be run into a well on a fishing string and connected to a fish in the well bore, inner and outer telescopic bodies, means including longitudinally spaced seals defining between said bodies a hydraulic fluid chamber, compression piston means including an annular piston carried by one of said bodies and shiftable longitudinally in said chamber by the other of said bodies upon telescopic movement of said bodies in one direction to compress hydraulic fluid in said chamber, valve means in said chamber including means providing by-pass flow passage communicating with said chamber at opposite ends of said piston, a valve member normally closing said flow passage and shiftable to an open position to allow hydraulic fluid to by-pass said piston, trigger means carried by one of said bodies and opposing said valve member to move said valve member to said open position upon predetermined movement of said bodies in said direction, and hammer and anvil means on said bodies movable into engagement by the tension in said fishing string in response to further telescopic movement of said bodies in said one direction when said valve member is moved to said open position.

Claim 20

In a hydraulic jar adapted to be run into a well on a fishing string and connected to a fish in the well bore, inner and outer telescopic bodies, means including longitudinally spaced seals defining between said bodies a hydraulic fluid chamber, compression piston means including an annular piston carried by one of said bodies and shiftable longitudinally in said chamber by the other of said bodies upon telescopic movement of said bodies in one direction to compress hydraulic fluid in said chamber, valve means in said chamber including means providing by-pass flow passage communicating with said chamber at opposite ends of said piston, a valve member normally closing said flow passage and shiftable to an open position to allow hydraulic fluid to by-pass said piston, trigger means carried by one of said bodies and opposing said valve member to move said valve member to said open position upon predetermined movement of said bodies in said direction, and hammer and anvil means on said bodies movable into engagement by the tension in said fishing string in response to further telescopic movement of said bodies in said one direction when said valve member is moved to said open position.

Claim 21

In a hydraulic fishing jar as defined in claim 18, means adjustably positioning said trigger means with respect to said valve member for adjusting the maximum tension applicable to said fishing string.

Claim 22

In a hydraulic fishing jar as defined in claim 18, means adjustably positioning said trigger means with respect to said valve member for adjusting the maximum tension applicable to said fishing string, and means responsive to manipulation of said fishing string for adjusting the position of said trigger means.

Claim 23

In a hydraulic fishing jar as defined in claim 18, means adjustably positioning said trigger means with respect to said valve member for adjusting the maximum tension applicable to said fishing string, and means responsive to manipulation of said fishing string for adjusting the position of said trigger means, including holding means engageable for connecting said trigger means to one of said bodies and releasable upon rotation of said trigger means relative to said one of said bodies, and the other of said bodies and said trigger means having means for rotating said trigger means responsive to relative telescopic movement of said bodies.

Claim 24

In a hydraulic fishing jar as defined in claim 18, means adjustably positioning said trigger means with respect to said valve member for adjusting the maximum tension applicable to said fishing string, and means responsive to manipulation of said fishing string for adjusting the position of said trigger means, including holding means engageable for connecting said trigger means to one of said bodies and releasable upon relative rotation of said trigger means relative to said one of said bodies, the other of said bodies and said trigger means having means for rotating said trigger means responsive to relative telescopic movement of said bodies, and means for moving said trigger means to adjusted positions with respect to said one of said bodies and said valve member when said trigger means is released from said one of said bodies.

Claim 25

In a hydraulic fishing jar as defined in claim 18, said trigger means and one of said bodies having coengageable holding means releasable to permit adjustment of said trigger means with respect to said one of said bodies and said valve member, and means for moving said trigger means to adjusted positions determined by tension applied to the fishing string.

Claim 26

In a hydraulic fishing jar as defined in claim 18, said trigger means comprising a tubular member rotatable relative to said bodies, said member and one of said bodies having opposed angularly spaced ribbed and unribbed portions, said ribbed portions being engageable and releasable upon rotation of said member, the other of said bodies and said member having means responsive to relative telescoping of said bodies for rotating said member.

Claim 27

In a hydraulic fishing jar as defined in claim 18, said trigger means comprising a tubular member rotatable relative to said bodies, said member and one of said bodies having opposed angularly spaced ribbed and unribbed portions, said ribbed portions being engageable and releasable upon rotation of said member, the other of said bodies and said member having means responsive to relative telescoping of said bodies for rotating said member, and means for moving said member longitudinally of saId one of said bodies when said ribbed portions are released for reengagement of said ribbed portions at a location spaced longitudinally of said one of said bodies.

Claim 28

In a hydraulic fishing jar as defined in claim 18, said trigger means comprising a tubular member rotatable relative to said bodies, said member and one of said bodies having opposed angularly spaced ribbed and unribbed portions, said ribbed portions being engageable and releasable upon rotation of said member, the other of said bodies and said member having means responsive to relative telescoping of said bodies for rotating said member, and means for moving said member longitudinally of said one of said bodies when said ribbed portions are released for reengagement of said ribbed portions at a location spaced longitudinally of said one of said bodies in response to telescopic movement of said bodies.

Claim 29

In a hydraulic fishing jar as defined in claim 18, said trigger means comprising a tubular member rotatable relative to said bodies, said member and one of said bodies having opposed angularly spaced ribbed and unribbed portions, said ribbed portions being engageable and releasable upon rotation of said member, the other of said bodies and said member having means responsive to relative telescoping of said bodies for rotating said member, and means for moving said member longitudinally of said one of said bodies when said ribbed portions are released for reengagement of said ribbed portions at a location spaced longitudinally of said one of said bodies in response to telescopic movement of said bodies and depending upon the magnitude of compression of said hydraulic fluid.

Claim 30

In a hydraulic fishing jar as defined in claim 18, said trigger means comprising a tubular member rotatable relative to said bodies, said member and one of said bodies having opposed angularly spaced ribbed and unribbed portions, said ribbed portions being engageable and releasable upon rotation of said member, the other of said bodies and said member having means responsive to relative telescoping of said bodies for rotating said member, and means for moving said member longitudinally of said one of said bodies when said ribbed portions are released for reengagement of said ribbed portions at a location spaced longitudinally of said one of said bodies, said ribbed portions comprising threaded segments.

Claim 31

In a hydraulic fishing jar as defined in claim 18, said trigger means comprising a tubular member rotatable relative to said bodies, said member and one of said bodies having opposed angularly spaced ribbed and unribbed portions, said ribbed portions being engageable and releasable upon rotation of said member, the other of said bodies and said member having means responsive to relative telescoping of said bodies for rotating said member, and including ratchet means for holding said member in position for re-engagement of said ribbed portions at adjusted longitudinally spaced locations.

Claim 32

In a hydraulic fishing jar as defined in claim 18, said trigger means comprising a tubular member rotatable relative to said bodies, said member and one of said bodies having opposed angularly spaced ribbed and unribbed portions, said ribbed portions being engageable and releasable upon rotation of said member, the other of said bodies and said member having means responsive to relative telescoping of said bodies for rotating said member, and including ratchet means for holding said member in position for re-engagement of said ribbed portions at adjusted longitudinally spaced locations, said ratchet means including resilient ratchet arms complemental to said ribbed portions.

Claim 33

In a hydraulic fishing jar as defined in claim 18, said trigger means comprising a tubular member rotatable relative to said bodies, said member and one of said bodies having opposed angularly spaced ribbed and unribbed portions, said ribbed portions being engageable and releasable upon rotation of said member, the other of said bodies and said member Having means responsive to relative telescoping of said bodies for rotating said member, and means for moving said member longitudinally of said one of said bodies when said ribbed portions are released for re-engagement of said ribbed portions at a location spaced longitudinally of said one of said bodies, including a spring normally biasing said member in one direction, and means movable with one of said bodies into engagement with said member to move the latter in the other direction.

Claim 34

In a hydraulic fishing jar as defined in claim 18, said trigger means comprising a tubular member rotatable relative to said bodies, said member and one of said bodies having opposed angularly spaced ribbed and unribbed portions, said ribbed portions being engageable and releasable upon rotation of said member, the other of said bodies and said member having means responsive to relative telescoping of said bodies for rotating said member, and means for moving said member longitudinally of said one of said bodies when said ribbed portions are released for re-engagement of said ribbed portions at a location spaced longitudinally of said one of said bodies, including a spring normally biasing said member in one direction, and means including said valve member movable with one of said bodies into engagement with said trigger member to move the latter in the other direction in response to telescopic movement of said bodies.

Claim 35

In a hydraulic fishing jar as defined in claim 18, said trigger means and one of said bodies having coengageable holding means for holding said trigger means in longitudinally adjusted positions on said one of said bodies, said holding means being releasable and engageable upon rotation of said trigger means with respect to said one of said bodies, means for enabling longitudinal movement of said trigger means with respect to said one of said bodies when said holding means are released, and means on said trigger means and one of said bodies for rotating said trigger means responsive to telescopic movement of said bodies.

Claim 36

In a hydraulic fishing jar as defined in claim 18, said trigger means and one of said bodies having coengageable holding means for holding said trigger means in longitudinally adjusted positions on said one of said bodies, said holding means being releasable and engageable upon rotation of said trigger means with respect to said one of said bodies, means for enabling longitudinal movement of said trigger means with respect to said one of said bodies when said holding means are released, and companion pin and slot means on said trigger means and one of said bodies for rotating said trigger means responsive to telescopic movement of said bodies.

Claim 37

In a hydraulic fishing jar as defined in claim 18, said trigger means and one of said bodies having coengageable holding means for holding said trigger means in longitudinally adjusted positions on said one of said bodies, said holding means being releasable and engageable upon rotation of said trigger means with respect to said one of said bodies, means for enabling longitudinal movement of said trigger means with respect to said one of said bodies when said holding means are released, and companion pin and slot means on said trigger means and one of said bodies for rotating said trigger means responsive to telescopic movement of said bodies, said pin and slot means comprising a compound slot having longitudinally extended, circumferentially spaced sections and connecting sections defined by inclined walls for camming said pin between said longitudinally extended sections to release said holding means and engage said holding means.

Claim 38

In a hydraulic fishing jar as defined in claim 18, said trigger means and one of said bodies having coengageable means for holding said trigger means in longitudinally adjusted positions on said one of said bodies, said holding means being releasable and engageable upon rotation of said trigger means with respect to said one of said bodies, means for enablinG longitudinal movement of said trigger means with respect to said one of said bodies when said holding means are released, and companion pin and slot means on said trigger means and one of said bodies for rotating said trigger means responsive to telescopic movement of said bodies, said pin and slot means comprising a compound slot having longitudinally extended, circumferentially spaced sections and connecting sections defined by inclined walls for camming said pin between said longitudinally extended sections to release said holding means and engage said holding means, and means for moving said trigger means longitudinally when said pin is in one of said longitudinally extended sections and said holding means are released.

Claim 39

In a hydraulic fishing jar as defined in claim 18, said trigger means and one of said bodies having coengageable holding means for holding said trigger means in longitudinally adjusted positions on said one of said bodies, said holding means being releasable and engageable upon rotation of said trigger means with respect to said one of said bodies, means for enabling longitudinal movement of said trigger means with respect to said one of said bodies when said holding means are released, and companion pin and slot means on said trigger means and one of said bodies for rotating said trigger means responsive to telescopic movement of said bodies, said pin and slot means comprising a compound slot having longitudinally extended, circumferentially spaced sections and connecting sections defined by inclined walls for camming said pin between said longitudinally extended sections to release said holding means and engage said holding means, and means for moving said trigger means longitudinally when said pin is in one of said longitudinally extended sections and said holding means are released, including spring means biasing said trigger means to a lowermost position.

Claim 40

In a hydraulic fishing jar as defined in claim 18, said trigger means and one of said bodies having coengageable holding means for holding said trigger means in longitudinally adjusted positions on said one of said bodies, said holding means being releasable and engageable upon rotation of said trigger means with respect to said one of said bodies, means for enabling longitudinal movement of said trigger means with respect to said one of said bodies when said holding means are released, and companion pin and slot means on said trigger means and one of said bodies for rotating said trigger means responsive to telescopic movement of said bodies, said pin and slot means comprising a compound slot having longitudinally extended, circumferentially spaced sections and connecting sections defined by inclined walls for camming said pin between said longitudinally extended sections to release said holding means and engage said holding means, means for moving said trigger means longitudinally when said pin is in one of said longitudinally extended sections and said holding means are released, including spring means biasing said trigger means to a lowermost position, and means responsive to telescopic movement of said bodies in said one direction to move said trigger means to an upwardly adjusted position depending upon the tension of said fishing string.

Claim 41

In a hydraulic fishing jar as defined in claim 18, said trigger means and one of said bodies having coengageable holding means for holding said trigger means in longitudinally adjusted positions on said one of said bodies, said holding means being releasable and engageable upon rotation of said trigger means with respect to said one of said bodies, means for enabling longitudinal movement of said trigger means with respect to said one of said bodies when said holding means are released, and companion pin and slot means on said trigger means and one of said bodies for rotating said trigger means responsive to telescopic movement of said bodies, said pin and slot means comprising a compound slot having longitudinally extended, circumferenTially spaced sections and connecting sections defined by inclined walls for camming said pin between said longitudinally extended sections to release said holding means and engage said holding means, means for moving said trigger means longitudinally when said pin is in one of said longitudinally extended sections and said holding means are released, including spring means biasing said trigger means to a lowermost position, and means responsive to telescopic movement of said bodies in said one direction to move said trigger means to an upwardly adjusted position depending upon the tension of said fishing string, said trigger means and said one of said bodies having ratchet means for preventing downward movement of said trigger means from said upwardly adjusted position for engagement of said holding means upon rotation of said trigger means.

Claim 42

In a hydraulic fishing jar as defined in claim 18, said trigger means and one of said bodies having coengageable holding means for holding said trigger means in longitudinally adjusted positions on said one of said bodies, said holding means being releasable and engageable upon rotation of said trigger means with respect to said one of said bodies, means for enabling longitudinal movement of said trigger means with respect to said one of said bodies when said holding means are released, and companion pin and slot means on said trigger means and one of said bodies for rotating said trigger means responsive to telescopic movement of said bodies, said pin and slot means comprising a compound slot having longitudinally extended, circumferentially spaced sections and connecting sections defined by inclined walls for camming said pin between said longitudinally extended sections to release said holding means and engage said holding means, means for moving said trigger means longitudinally when said pin is in one of said longitudinally extended sections and said holding means are released, including spring means biasing said trigger means to a lowermost position, and means responsive to telescopic movement of said bodies in said one direction to move said trigger means to an upwardly adjusted position depending upon the tension of said fishing string, said trigger means and said one of said bodies having ratchet means for preventing downward movement of said trigger means from said upwardly adjusted position for engagement of said holding means upon rotation of said trigger means, said holding means and said ratchet means comprising longitudinally extended and circumferentially spaced thread segments, and including stop means for limiting downward movement of said trigger means by said spring means, said stop means having a part on said trigger means and a stationary part on said one of said bodies, one of said parts having a recess for receiving the other part upon rotation of said trigger to engage said thread segments of said ratchet means with the thread segments of said holding means to enable limited further downward movement of said trigger means beyond said stop means to assure engagement of said ratchet means.