Abstract: A valve for use in a hanger body of a well system comprises a valve body. The valve body comprises an exterior surface comprising three segments. A first segment of the exterior surface is configured with a helical thread to engage a counter-threaded portion of the tubing hanger body. A second segment of the exterior surface is configured as an essentially circumferential groove to accommodate an essentially toroidal sealing member. The groove comprises essentially right angle shoulders at both intersections of the groove with the exterior surface. A third segment of the exterior surface is configured to be devoid of the helical thread, the third segment being intermediate the first segment and the second segment.

Abstract: A valve for use in a hanger body of a well system comprises a valve body configured for insertion into the hanger body in an axial direction and comprising an exterior surface. A first segment of the exterior surface is configured with a helical thread to engage a counter-threaded portion of a tubing hanger body. A second segment of the exterior surface is configured as an essentially circumferential groove to accommodate an essentially toroidal sealing member. The valve body further comprises at least one stop member configured to control an extent of the insertion of the valve body into the hanger body and thereby preclude threads of the counter-threaded portion of a tubing hanger body from affecting the essentially toroidal sealing member.

Abstract: A valve for use in a hanger body of a well system comprises a valve body configured for insertion into the hanger body in an axial direction and comprising an exterior surface. A first segment of the exterior surface is configured with a helical thread to engage a counter-threaded portion of a tubing hanger body. A second segment of the exterior surface is configured as an essentially circumferential groove to accommodate an essentially toroidal sealing member. The valve body further comprises at least one stop member configured to control an extent of the insertion of the valve body into the hanger body and thereby preclude threads of the counter-threaded portion of a tubing hanger body from affecting the essentially toroidal sealing member.

Abstract: A valve for use in a hanger body of a well system comprises a valve body. The valve body comprises an exterior surface comprising three segments. A first segment of the exterior surface is configured with a helical thread to engage a counter-threaded portion of the tubing hanger body. A second segment of the exterior surface is configured as an essentially circumferential groove to accommodate an essentially toroidal sealing member. The groove comprises essentially right angle shoulders at both intersections of the groove with the exterior surface. A third segment of the exterior surface is configured to be devoid of the helical thread, the third segment being intermediate the first segment and the second segment.

Abstract: A lubricator for a well system comprises at least one piston and at least one piston plug. The at least one piston is axially slidable within the lubricator along a lubricator axis. The at least one piston comprises a piston alignment contour of a surface of the at least one piston. The at least one piston plug is configured to limit an extent of axial displacement of the at least one piston, and comprises a piston plug alignment contour of a surface of the piston plug. The piston alignment contour and the piston plug alignment contour are configured to mate and automatically circumferentially align the at least one piston and the at least one piston plug about the axis upon travel of the at least one piston along the axis toward the at least one piston plug.

Abstract: A lubricator for a well system comprises at least one piston and at least one piston plug. The at least one piston is axially slidable within the lubricator along a lubricator axis. The at least one piston comprises a piston alignment contour of a surface of the at least one piston. The at least one piston plug is configured to limit an extent of axial displacement of the at least one piston, and comprises a piston plug alignment contour of a surface of the piston plug. The piston alignment contour and the piston plug alignment contour are configured to mate and automatically circumferentially align the at least one piston and the at least one piston plug about the axis upon travel of the at least one piston along the axis toward the at least one piston plug.

Abstract: In one of its example aspects the technology disclosed herein concerns a wellhead lubricator. In an example embodiment and mode the wellhead lubricator comprises a yoke housing; a first clamp; a second clamp; and, an extensible actuator. The yoke housing comprises a first end configured for connection to a barrel housing and a second end configured for connection to a wellhead. The yoke housing defines a yoke cavity through which a barrel rod extends along an axis of the yoke cavity. The first clamp is situated in the yoke cavity and is configured for selective engagement with the barrel rod. The second clamp is also situated in the yoke cavity and is configured for selective engagement with the barrel rod. The extensible actuator is connected to at least one of the first clamp and the second clamp. The extensible actuator, the first clamp, and the second clamp are configured to be operated in coordinated manner to provide translation of the barrel rod along the axis of the yoke cavity.

Abstract: In one of its example aspects the technology disclosed herein concerns a wellhead lubricator. In an example embodiment and mode the wellhead lubricator comprises a yoke housing; a first clamp; a second clamp; and, an extensible actuator. The yoke housing comprises a first end configured for connection to a barrel housing and a second end configured for connection to a wellhead. The yoke housing defines a yoke cavity through which a barrel rod extends along an axis of the yoke cavity. The first clamp is situated in the yoke cavity and is configured for selective engagement with the barrel rod. The second clamp is also situated in the yoke cavity and is configured for selective engagement with the barrel rod. The extensible actuator is connected to at least one of the first clamp and the second clamp. The extensible actuator, the first clamp, and the second clamp are configured to be operated in coordinated manner to provide translation of the barrel rod along the axis of the yoke cavity.

Abstract: A method includes pumping cement to a bore of a shifting sleeve disposed in a ported component seated in a cased bore above a liner; flowing the cement from the bore of the shifting sleeve through radial passages of the shifting sleeve and radial passages of the ported component; and flowing the cement to an annulus between a casing of the cased bore and the liner.

Abstract: An assembly includes a ported component that includes a bore, radial passages, and axial passages; and a shifting sleeve that comprises a bore, radial passages, seal bosses and associated seal elements that define at least one sealed region with respect to the radial passages of the ported component and that define an open region with respect to the radial passages of the ported component.

Abstract: A method includes pumping cement to a bore of a shifting sleeve disposed in a ported component seated in a cased bore above a liner; flowing the cement from the bore of the shifting sleeve through radial passages of the shifting sleeve and radial passages of the ported component; and flowing the cement to an annulus between a casing of the cased bore and the liner.

Abstract: An assembly includes a ported component that includes a bore, radial passages, and axial passages; and a shifting sleeve that comprises a bore, radial passages, seal bosses and associated seal elements that define at least one sealed region with respect to the radial passages of the ported component and that define an open region with respect to the radial passages of the ported component.

Abstract: A method can include pumping cement to a bore of a shifting sleeve disposed in a ported component seated in a cased bore above a liner; flowing the cement from the bore of the shifting sleeve through radial passages of the shifting sleeve and radial Rock passages of the ported component; and flowing the cement to an annulus between a casing of the cased bore and the liner.

Abstract: A method can include pumping cement to a bore of a shifting sleeve disposed in a ported component seated in a cased bore above a liner; flowing the cement from the bore of the shifting sleeve through radial passages of the shifting sleeve and radial Rock passages of the ported component; and flowing the cement to an annulus between a casing of the cased bore and the liner.

Abstract: A technique facilitates miming of casing strings in a multilateral well. A conductor tube may be placed into a hole formed in a seabed. A plurality of oriented casings is deployed in the conductor tube and the oriented casings have a specific exit angle and azimuthal orientation. The orientation of each oriented casing is used to direct a corresponding drilling of a borehole and placement of a casing in the borehole in a manner which does not interfere with other boreholes and casings.

Abstract: A downhole tool having a cylindrical body, a sleeve having a contact portion disposed on a distal end, and a cutter having a radiused portion on a top surface operatively engageable with the contact portion. Also, a method of cutting drill pipe, the method including disposing a cutting tool in a wellbore around the drill pip and actuating a radiused cutter of the cutting tool, wherein the actuating includes radially extending the cutter into contact with the drill pipe. The method also includes applying a substantially constant force between the cutter and the drill pipe and rotating the cutting tool. Additionally, a cutter for a drill pipe cutting tool, the cutter including a work surface located at a first end of the cutter, an attachment point located at a second end of the cutter, and a radiused surface located between the work surface and the attachment point.

Abstract: A downhole tool having a cylindrical body, a sleeve having a contact portion disposed on a distal end, and a cutter having a radiused portion on a top surface operatively engageable with the contact portion. Also, a method of cutting drill pipe, the method including disposing a cutting tool in a wellbore around the drill pip and actuating a radiused cutter of the cutting tool, wherein the actuating includes radially extending the cutter into contact with the drill pipe. The method also includes applying a substantially constant force between the cutter and the drill pipe and rotating the cutting tool. Additionally, a cutter for a drill pipe cutting tool, the cutter including a work surface located at a first end of the cutter, an attachment point located at a second end of the cutter, and a radiused surface located between the work surface and the attachment point.

Abstract: Methods of removing casing from a wellbore, the method including disposing a drilling tool assembly in a wellbore, the drilling tool assembly including a cutting device, a spearing device, and a jarring device. The methods further including activating the cutting device, cutting a first casing segment, deactivating the cutting device and activating a spearing device. The method further including engaging the spearing device with the first casing segment, activating the jarring device to free the first casing segment, and removing the first casing segment from the wellbore.

Abstract: Methods of removing casing from a wellbore, the method including disposing a drilling tool assembly in a wellbore, the drilling tool assembly including a cutting device, a spearing device, and a jarring device. The methods further including activating the cutting device, cutting a first casing segment, deactivating the cutting device and activating a spearing device. The method further including engaging the spearing device with the first casing segment, activating the jarring device to free the first casing segment, and removing the first casing segment from the wellbore.

Abstract: A mill assembly includes a shaft; a lead mill secured to a first end of the shaft, the lead mill including a first body having a plurality of first blades and a plurality of first cutters having substantially cylindrical bodies secured to the plurality of first blades; and a second mill secured to the shaft a selected distance from the lead mill, the second mill including a second body having a plurality of second blades and a plurality of second cutters having substantially cylindrical bodies secured to the plurality of blades.