Abstract: A centralizing perforating gun for perforating a tubular in a wellbore include a gun housing, perforating charges positioned within the gun housing and detonatable to perforate the tubular, and a centralizing system. The centralizing system includes an extendable member configured to move between a retracted position and an extended position. The extendable member is configured to engage a surface of the tubular in the extended position, thereby biasing the centralizing perforating gun away from the surface of the tubular.

Abstract: A compact setting tool that sets a packer or bridge plug in a wellbore and then self bleeds the gas pressure prior to pulling the string out of the wellbore.

Abstract: A lock plug (7A) is inserted into a plug installation position of an insertion hole (5a) of a tool stem (5) connected to a drill string (10), and when a fluid has flowed to the insertion hole (5a), a stopper (62) protrudes radially outward from a tool body (6) and is locked to a subsea wellhead (4) and an internal stopper (66) protrudes radially inward from the tool body (6) and is locked to the tool stem (5) in a lock state. An unlock plug is inserted into the plug installation position of the insertion hole (5a), and when the fluid has flowed into the insertion hole (5a), the stopper (62) is separated from the subsea wellhead (4) and the internal stopper (66) is separated from the tool stem (5) to release the lock state.

Abstract: A valve housing has a first flapper moveable from an open position in the housing in which two-way flow is allowed to a closed position in which only one-way flow is permitted. A first collet sleeve is moveable from a first position to a second position in the valve housing. The first collet sleeve in the first position retains the flapper valve in the open position. The collet sleeve is moveable from a first position to a second position which allows the flapper to move to a closed position.

Abstract: Example of the present disclosure relate to frac sleeve with set of inner sleeves that allow selective open and close of such sleeves, where clusters of the same frac sleeves to be treated top to bottom.

Abstract: A method of drilling a wellbore includes running a drilling assembly into the wellbore through a casing string, the drilling assembly having a tubular string, a stabilizer, and a drill bit; applying a force to an arm of the stabilizer, thereby causing the arm to retract; and removing the stabilizer and the drill bit from the wellbore.

Abstract: An apparatus includes a blowout preventer housing comprising a bore extending therethrough and a cavity intersecting the bore and a shear ram movably positionable within the cavity and at least partially movable into the bore of the blowout preventer housing. The apparatus further includes a projectile receivable into the bore of the blowout preventer housing and configured to pierce a tubular member when positioned within the bore of the blowout preventer housing.

Abstract: Apparatuses for restricting fluid flow through a well conduit comprise a tubular member having a seat member disposed within the tubular member for receiving a plug element. One or both of the seat member or the plug element comprise at least one shape-memory material to facilitate the plug element being able to land on the seat and/or to facilitate the plug element to pass through a seat member or other restriction in the tubular member either before or after landing on a seat.

Abstract: The present invention provides a swivel sub for connection in a work string between a workstring and a downhole apparatus. The swivel sub includes a first substantially cylindrical body, including a sleeve portion having one or more teeth and a second substantially cylindrical body being partially located within the sleeve portion. The bodies are arranged to rotate relative to each other. The swivel sub also includes a sliding sleeve, having one or more teeth arranged mutually engage with the first teeth is axially moveable between disengaged and engaged positions, in one embodiment by a pressure differential being created in the sub. Further, the present invention provides methods for of running the tool, with particular application to setting and hanging of liners and screens.

Abstract: A downhole tool for providing a pressure differential between sub-assemblies, the downhole tool including an elongated body, a tubular assembly disposed within the elongated body, the tubular assembly including a central flowbore with an inner diameter and a central longitudinal axis, a camming device, an actuator member located below the tubular assembly, having a dual-bore configuration, the actuator member including a first bore, a second bore, and a concave seating surface formed within the second bore for receiving a obstructing device, wherein the first bore and the second bore are oriented 90 degrees to one another so that fluid may flow through the actuator while it is in either a first or a second position, and a stationary sleeve concentrically disposed between the actuator member and the elongated body is disclosed.

Abstract: A travel joint and latching assembly is connected below a gravel pack service tool to set an isolation assembly while performing backwashing and gravel pack operations, in a single trip. The travel joint is protected against inadvertent expansion by a positive mechanical lock assembly which isolates and decouples mechanical loading forces which may arise during the setting of the packer and during gravel pack operations. Inadvertent set of the hydraulic packer during backwashing operations is prevented by a hydraulic setting tool which includes a shear sleeve and an expandable C-ring drop ball seat.

Abstract: A hydraulic control sub assembly for actuating hydraulically operated downhole remedial tools, such as section mills or underreamers, is disclosed. The control sub features a drop ball mechanism to terminate the flow of drilling fluid to the hydraulic tool thereby inactivating the tool. The control sub also has a hydraulic rupture disc that permits drilling fluid circulation when tripping the drill pipe. The control sub further contains upwardly directed jet nozzles to enhance fluid flow in the well bore to help clear away debris. A float valve is also incorporated in the control sub to ensure there is no fluid under high pressure trapped in the hydraulic tool that may jam the tool.

Abstract: An earth well completion apparatus and method wherein a work string equipped for jet washing downhole filtration devices, such as well screens and for back washing said downhole filtration devices and containing multiple ball catcher subs which utilize the same drop ball to prevent the inadvertent operation of hydraulically powered tools as well as to permanently valve closed a portion of said work string is concentrically disposed in a production string and run in said well simultaneously. Said ball catcher sub which prevents the inadvertent actuation of said hydraulically operated tools is contained within the main fluid bore of said work string and has an expellable inner collar with an outwardly biased catcher ring which, when expelled, shears hollow shearable means thereby actuating said tool.

Abstract: An earth well completion apparatus and method wherein a work string equipped for jet washing downhole filtration devices, such as well screens and for back washing said downhole filtration devices and containing multiple ball catcher subs which utilize the same drop ball to prevent the inadvertent operation of hydraulically powered tools as well as to permanently valve closed a portion of said work string is concentrically disposed in a production string and run in said well simultaneously. Said ball catcher sub which prevents the inadvertent actuation of said hydraulically operated tools is contained within the main fluid bore of said work string and has an expellable inner collar with an outwardly biased catcher ring which, when expelled, shears hollow shearable means thereby actuating said tool.

Abstract: A downhole tool is provided suitable for multiple setting and unsetting operations in a well bore during a single trip. The downhole tool is suspended in the wellbore from a tubing string, and is activated by dropping a metal ball which plugs the passageway through the tubing string, such that tubing pressure may thereafter be increased to activate the downhole tool. A sleeve is axially movable within a control sub from a ball stop position to a ball release position, and has a cylindrical-shaped interior surface with a diameter only slightly greater than the ball. Collet fingers carried on the sleeve are radially movable from an inward position to an outward position to stop or release the ball as a function of the axial position of the sleeve.

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.

Abstract: A mechanical latching device for repeatable latching and unlatching of downhole well tools is adapted for use in a mandrel interconnected with a tubing string of a well, the mandrel forming a downwardly directed internal shoulder. The latch mechanism incorporates a fishing neck adapted for interconnection with the downhole tool. The fishing neck is disposed in upstanding generally centralized relation within the mandrel. A collet member which may be a component part of a well service tool or which may be a component part of the latch mechanism defines pulling shoulders at the free extremity of collet fingers defined thereby. A latch retainer is disposed in movable relation about the fishing neck and is movable between latched and unlatched positions relative to the fishing neck. In the latched position the latch retainer provides external support for the collet fingers to maintain the collet fingers in latching interengagement with a pulling flank.

Abstract: A packer assembly is provided suitable for multiple setting and unsetting operations in a well bore during a single trip to seal the annulus between the interior walls of the well bore and a tubing string. Thge packer is set by dropping a metal ball which plugs the passageway through the tubing string, such that tubing pressure may thereafter be increased to inflate the packer. A sleeve is axially movable within a control sub from a ball stop position to a ball release position, and has a cylindrical-shaped interior surface with a diameter only slightly greater than the ball. Collet fingers carried on the sleeve are radially movable from an inward position to an outward position to stop or release the ball as a function of the axial position of the sleeve.

Abstract: A well flow control device for use in an oil and/or gas well tubing string for communicating between the tubing string and the annulus. A tubular body having a plurality of openings with a sleeve telescopically movable in the interior of the body and initially covering and closing the openings. A plurality of dogs are carried by the sleeve in windows which taper upwardly and inwardly. The dogs include a ball which engages a backup shoulder in the body to hold the dogs inwardly when the sleeve covers the openings. The sleeve includes a shoulder engaging the balls for limiting the extent of the inward movement of the dogs and the body includes a recess to receive the dogs when the sleeve is moved to an opening position. Mechanical or hydrostatic shear releases are provided.

Abstract: A well completion system particularly adapted for pumpdown operation in which landing of a standing valve in a foot valve automatically opens a foot valve and in which withdrawing of the standing valve automatically closes the foot valve and in which provisions are made to pump by both valves.

Abstract: Well tools comprising a go-devil actuated well safety valve, a locking assembly for releasably locking the safety valve at a desired depth in a well, running and pulling tools for installing and removing the safety valve, a go-devil ball for closing the safety valve, and apparatus for dropping the go-devil ball into a well under pressure and for retrieving the ball. The go-devil safety valve is mounted above the locking assembly and includes a trigger type latch which is released from above by the impact of the go-devil ball. The valve may be reset for reopening the valve without removal of the valve from the well bore by means of a special reset and pulling tool disclosed herein. The go-devil valve is installed in a well, preferably above a storm choke, to shut the well in under emergency conditions which releases the go-devil ball at the surface in response to hazardous conditions such as fire. The go-devil ball drops to the go-devil valve which closes in response to the impact of the ball.