Abstract: A method and apparatus for setting a packer assembly having an upper packer and a lower packer in a wellbore in a single trip into a wellbore is provided. The packer assembly is configured to be retrieved from the wellbore using a retrieval tool in a single trip into the wellbore. The retrieval tool is configured to be released from the packer assembly while in the wellbore during a retrieval process in the event that the packer assembly will not release from the wellbore or is otherwise prevented from removal from the wellbore.

Abstract: A method and apparatus for setting a packer assembly having an upper packer and a lower packer in a wellbore in a single trip into a wellbore is provided. The packer assembly is configured to be retrieved from the wellbore using a retrieval tool in a single trip into the wellbore. The retrieval tool is configured to be released from the packer assembly while in the wellbore during a retrieval process in the event that the packer assembly will not release from the wellbore or is otherwise prevented from removal from the wellbore.

Abstract: The present invention discloses a whipstock retrieval assembly for use in a wellbore to retrieve a downhole tool such as a whipstock from a borehole. In one aspect, the retriever includes a threaded barrel which is received over the tray end of the whipstock, and a securing member, preferably a conical member, pinches the whipstock tray portion received in the retriever against the barrel to prevent loss of the whipstock from the retriever as it is pulled from the borehole. In a second aspect, the retriever assembly includes a hook which is placed in a pre-supplied slot in the whipstock, and a shroud is deployed over the extending end of the whipstock to provide a smooth surface to pull the retriever and whipstock from the borehole.

Abstract: A connector for coiled tubing has been invented which has a hollow body member having a top, a bottom, and a fluid flow channel therethrough from top to bottom, coiled tubing gripping apparatus connected to the hollow body, and a movable member movably connected to the bottom of the hollow body, the movable member having a top, a bottom, a top portion within the hollow body and a bottom portion projecting down beyond the bottom of the movable body, the movable member movable with respect to the hollow body and having a fluid flow bore therethrough from top to bottom. In one aspect the movable member is movable longitudinally with respect to the hollow body and/or laterally with respect to a longitudinal axis of the hollow body. In certain aspects the connector has selectively locking apparatus for selectively drivingly locking the hollow body to the movable member.

Abstract: A wash nozzle for wellbore washing operations has been invented, the wash nozzle, in one aspect having a central mandrel with a top, a bottom, and a fluid flow bore therethrough from top to bottom, at least one mandrel port through the central mandrel for fluid flow from within the central mandrel's fluid flow bore to an exterior of the central mandrel, a hollow sleeve rotatably mounted around the central mandrel, and at least one sleeve port through the sleeve for fluid flow from within the sleeve from the exterior of the central mandrel to an exterior of the sleeve, the at least one sleeve port defined by a wall on the sleeve. In one aspect the wash nozzle includes apparatus for selective rotation of the sleeve about the mandrel. In one aspect flow through the wash nozzle is stopped to effect sleeve rotation and, in one particular aspect, flow through the nozzle is then re-established. Methods have been invented using such wash nozzles for wellbore washing operations and/or cuttings removal.

Abstract: An apparatus for retrieving an object from a wellbore has been invented having an inner body and a longitudinal fluid flow bore therethrough, and at least one lateral flow bore therethrough, the bottom end having an opening suitable for receiving therein a fluid actuable member disposed for reciprocation with respect to the inner body, bias apparatus contacting the fluid actuable member for moving the fluid actuable member with respect to the inner body, and the fluid actuable member disposed so that the bias apparatus can push the fluid actuable member down to contact a plurality of fingers and move them into the longitudinal flow bore to engage the object in the wellbore when insufficient fluid pressure is present to overcome force of the bias apparatus in the fluid actuable member.

Abstract: A cutting tool has been invented for use in a wellbore to cut formation through which the wellbore extends or to cut items in the wellbore, the tool having, in one aspect, a body disposable at a desired location in the wellbore, at least one first blade pivotably mounted to the body at a first height on the body, at least one second blade pivotably mounted to the body at a second height on the body, the second height above the first height, the blades movable from a first position against the body to a second position extending out from the body for cutting, and the first blades shorter in length than the second blades.

Abstract: A fishing spear for retrieving a fish from a wellbore comprises a mandrel fixedly secured to an upper sub, a collet assembly telescopically surrounding the mandrel and a support sleeve telescopically surrounding the mandrel and positioned between the mandrel and the collet assembly. An expandable fluid cavity is formed between a portion of the facing surfaces of the support sleeve and the mandrel. A coil spring, which is disposed between the support sleeve and the upper sub, downwardly biases the support sleeve so that it rests against a projecting head at the bottom of the mandrel when fluid pressure is not applied to the expandable cavity. The collet assembly includes a plurality of collet fingers, each having a collet head at the end thereof. The collet fingers are naturally inwardly radially biased in the direction of the mandrel. When the support sleeve rests on the projecting head, the collet heads are radially outwardly displaced or wedged.

Abstract: An external pulling tool for retrieving a fish from a wellbore comprises a mandrel fixedly secured to an upper sub, an outer cover fixedly secured to and depending from the upper sub, a collet assembly telescopically surrounding the bottom portion of the mandrel and a support sleeve telescopically surrounding the collet assembly and positioned between the collet assembly and the outer cover. An expandable fluid cavity is formed between a portion of the facing surfaces of the support sleeve and the mandrel. A coil spring, which is disposed between the support sleeve and the upper sub, downwardly biases the support sleeve so that it rests against a lower shoulder on the outer cover when fluid pressure is not applied to the expandable cavil. The collet assembly includes a plurality of collet fingers, each having a collet head at the end thereof. The collet fingers are naturally outwardly radially biased in the direction of the outer cover.

Abstract: A well service tool has a mandrel including a fluid flow conduit therethrough in fluid communication with a workstring including a fluid pressure source. An expendable knife-mounting sleeve is coupled to the mandrel and includes at least one cutting knife pivotally secured thereto. A housing is disposed about and secured against rotation relative to the mandrel by drive pins and is selectively movable relative to the mandrel responsive to fluid pressure from the fluid pressure source. The housing includes a positive extender to extend the cutting knives and temporarily maintain them in an extended position. A closure member is coupled to the mandrel to selectively obstruct fluid flow through the fluid conduit, wherein fluid pressure within the fluid conduit is increased, and wherein relative movement between the housing and the mandrel is induced. A probe is coupled to the housing to open the closure member upon a selected extension of the cutting knives wherein fluid pressure within the mandrel is decreased.

Abstract: A spear and overshot are provided that use a plurality of collets. The collets are initially displaced by the fish until they are presented against a reduced diameter portion of the apparatus. At that point, the collets are inwardly attracted and the apparatus can be lowered into the fish or onto the fish. Further movement of the apparatus allows engagement of the fish onto the collets as the collets spring back to their original position with the fish trap above. Thereafter, should the fish need to be released, hydraulic pressure is applied within the apparatus shifting a body with respect to the collets allowing them again to be radially inwardly deflected for release of the fish.

Abstract: A milling and retrieval tool (10) to remove a packer (14) from a casing (12), and a method to release the tool (10) from the packer (14) for separate removal from the casing (10). Tool (10) includes a sleeve (58) having resilient fingers (60) which spring inwardly against a reduced diameter mandrel portion (42) in the upward position of the sleeve (58) to permit passage of the sleeve (58) through the packer bore (15) for release of the tool (10) from the packer (14). The sleeve (58) is moved upwardly along the mandrel (11) by pressurized drilling fluid discharged from a lower opening (32) of a bullnose section (26). A shear ring (50) is provided to permit downward movement of the sleeve (58) adjacent a reduced diameter portion (30) of the bullnose section (26) for release of the tool (10) from the packer (14) upon the reaching of a predetermined jarring or bumping action of the sleeve (58) against the packer shoulder (18).