Abstract: A setting tool for a liner hanger in an oil well completion system wherein the setting tool mechanism incorporates structure for manipulating a liner prior to and subsequent to hanging the liner hanger in a well casing. Prior to setting the liner hanger the setting tool release nut is locked to a liner hanger by a releasable lug interconnection. After hanging the liner hanger, the lug interconnection is released and rotation of the setting tool mandrel uncouples the coupling nut from the liner hanger to release the setting tool from the liner hanger and further rotation of the coupling nut locks the coupling nut to the clutch housing so that the liner can be rotated after it is hung in a well casing.

Abstract: An assembly for installation within the end of a joint of casing or liner for use in a downhole environment where the casing or liner is disposed in the borehole which traverses earth formations. The assembly includes an annular split ring expander and an annular split ring slip element and a self-energizing packing element which has an interference fit with respect to the bore of a string of pipe. A mechanically operated setting tool has a set of nut members on a threaded mandrel which are selectively operated for setting the slip element of the assembly into a wedging engagement with the expander in the wall of a well pipe and for releasing the setting tool from the body of the assembly to leave the assembly installed within the end of a joint of casing or liner.

Abstract: An assembly for installation within the end of a joint of casing or liner for use in a downhole environment where the liner or casing is disposed in the borehole which traverses earth formations. The assembly includes an annular split ring expander and an annular split ring slip element and a self-energizing packing element which has an interference fit with respect to the bore of a string of pipe. A mechanically operated setting tool has a set of nut members on a threaded mandrel which are selectively operated for setting the slip element of the assembly into a wedging engagement with the expander in the wall of a well pipe and for releasing the setting tool from the body of the assembly to leave the assembly installed within the end of a joint of casing or liner. An expander nut is threadedly coupled to the end of the body of the assembly to lock the slip member in position and the bore of the body is conformed to receive a valve and a landing collar arrangement.

Abstract: A setting tool for a liner hanger in an oil well completion system wherein the setting tool mechanism incorporates structure for manipulating a liner prior to and subsequent to hanging the liner hanger in a well casing. Prior to setting the liner hanger the setting tool is locked to a liner hanger by an interconnection with a clutch housing. After hanging the liner hanger, rotation of the setting tool mandrel uncouples the coupling nut from the liner hanger to release the setting tool from the liner hanger and further rotation of the setting tool moves a lock nut to a position when the coupling nut locks the clutch housing to the setting tool so that the liner hanger can be rotated after it is hung in a well casing. The liner hanger and the clutch housing have interengageable clutch surfaces.

Abstract: A setting tool for a liner hanger in an oil well completion system wherein the setting tool mechanism incorporates the necessary structure for manipulating a liner prior to and subsequent to hanging the liner hanger in a well casing. Prior to setting the liner hanger the setting tool is keyed to a liner hanger by longitudinal dogs in longitudinal grooves. After hanging the liner hanger, the dogs are released and rotation of the setting tool mandrel uncouples a coupling nut from the liner hanger to release the setting tool from the liner hanger and further rotation locks the setting tool mandrel to the clutch housing with a lock nut so that the liner hanger can be rotated after it is hung in a well casing.

Abstract: A circulating valve for use in oil field operations which is pressure operated without use of a wireline tool. The valve has a sleeve assembly with telescopically joined sleeve members normally closing off a circulation port in a mandrel. A pressure differential is utilized to shift the joined sleeve members to an unjoined condition opening the circulation ports. A second pressure differential is utilized to rejoin the sleeve members and close off the circulation ports. The sleeve members are independently shear pinned to the mandrel.

Abstract: A multiple cone, multiple bearing liner hanger for hanging a well liner for extension of the casing liner. The multiple slip cone and multiple bearing arrangement provides uniform, positive distribution of liner weight thereby facilitating hanging of heavier liner strings. The multiple bearings ensure proper rotation of the liner during cementation. The multiple cone, multiple bearing liner hanger includes an upper slip assembly with an associated bearing and a lower slip assembly with an associated bearing. The hanger is hydraulically set by first setting the upper slips and thereafter setting the lower slips. A series of shear pins ensure proper setting of the hanger to distribute the hang weight evenly over the slip cones and bearings.

Abstract: A system for cementing liners in well bores where a liner and drill pipe are made up in telescopic relationship with the lower end of the drill pipe having a polished mandrel or slick pipe slidably and sealingly received in a sealing bore receptacle in the lower end of the liner at a location just above the cementing equipment. When an interconnected setting tool and liner hanger are attached to the drill pipe and liner, a continuous passage is formed by the drill pipe from the setting tool to the location below the sealing bore receptacle. The polished mandrel has an upper normally closed sleeve valve and a lower normally open check valve so that when the liner hanger is located in the well bore, the check valve can be closed for hydraulic operation of the setting tool and opened thereafter for cementing. The sleeve valve is opened at the end of the cementing operation to bypass the interior of the pipe string to the interior of the liner.

Abstract: A stage valve for stage cementing of casings in a well bore including a tubular collar and a telescopic tubular sleeve where the sleeve has a piston portion disposed in a collar chamber and the piston portion separates a sleeve port from a collar port in a lower position. In the lower position, the sleeve mechanically engages the collar and is movable to an upper position by a differential hydraulic pressure across the piston portion to an upper position placing the sleeve port and the collar port in fluid communication with one another. In moving to the upper position, the sleeve removes a barrier from a ratchet ring in the collar so that when the sleeve is moved downwardly from an upper position, a ratchet portion on the sleeve engages the ratchet ring in a lower position of the sleeve to lock the sleeve in a closed position.

Abstract: A selectively releasable valve in a wiper plug releasably attached to a hydraulic setting tool for a liner hanger in a well bore where the valve has an annular valve seat member having collapsible finger members for sealingly receiving a ball member. The valve seat member is movable under predetermined hydraulic pressure to shift and expand the finger members to release the ball member. The valve seat member is retained in the wiper plug.

Abstract: A rotatable liner hanger for an oil well with a supporting mandrel having an annular recess with upper and lower shoulders and a tubular housing and a bearing means disposed in the recess. The housing has elongated windows with side surfaces having tongue and grooves at an inclination angle of 15.degree. and elongated slip members with interfitting tongue and grooves along their side surfaces where the slip members are initially retracted within the windows of the housing and are extendible outwardly into load bearing support with a casing. A selectively actuated device controls the positioning of the slip members and an annular recess in the housing provides a bypass area when the slip members are extended.

Abstract: In a hydraulically operated setting tool for liner hangers used in a well bore, a norally countracted ball seat formed in the setting tool mandrel by contracted and elongated finger members. Upon seating a ball member in the ball seat, applied pressure is used to set the hydraulic setting tool. After setting the hydraulic setting tool, the ball seat is longitudinally movable so that the finger members can expand to a full opening condition in a recess and release the ball member and so that the finger members are also retrievable with the setting tool.