A surface safety valve for a well system includes a main valve body with a central bore through it. The main valve body has a centerline axis and is configured to be connected at a surface location above a surface of the Earth to a surface assembly of the well system and to receive through the central bore a flow of wellbore fluid from a subterranean zone conveyed by a production tubing. A gate is positioned within the main valve body and is configured to move from an open position in which the gate does not block flow of wellbore fluid through the central bore to a closed position in which the gate blocks flow of wellbore fluid through the central bore. The gate travels from the open position to the closed position along a gate movement axis perpendicular to the centerline bore axis. The gate includes a gate front end positioned on a first side of the centerline bore axis and a gate back end positioned on a second side of the centerline bore axis opposite the first side. The surface safety valve also includes an actuator positioned on the first side of the centerline bore axis. The actuator is configured to selectively push the gate towards the open position. The safety valve also includes a spring enclosed within the main valve body and positioned on the second side of the centerline bore axis. The spring is connected to the gate back end and is configured to bias the gate towards the closed position.

Method is provided for preventing fluid from entering a well, such as a producing well, during a hydraulic fracturing treatment in another well completed in the same reservoir. Degradable ball sealers or degradable particulate material is injected into the well and pressure is maintained in the well during the fracturing treatment to prevent influx of fluid.

A hydraulic fracturing tree wing is formed with a studded hydraulic valve next to a manual valve. The stud-to-flange connection allows for a shorter, lighter wing. The studded hydraulic valve may be a gate valve that includes a T-slot coupling between an operating stem and the gate. A bonnet seal ridge may be formed to withstand undue deformation during operation that wears or destroys seals. A method for forming a hydraulic fracturing tree assembly includes using a flanged manual valve with a studded hydraulic valve. Other valves and methods are presented.

A hydraulic fracturing tree wing is formed with a studded hydraulic valve next to a manual valve. The stud-to-flange connection allows for a shorter, lighter wing. The studded hydraulic valve may be a gate valve that includes a T-slot coupling between an operating stem and the gate. A bonnet seal ridge may be formed to withstand undue deformation during operation that wears or destroys seals. A method for forming a hydraulic fracturing tree assembly includes using a flanged manual valve with a studded hydraulic valve. Other valves and methods are presented.

An oilfield casing centralization tool allows a user to center the casing to install the casing hanger into the bowl profile of a wellhead to support the weight of the casing which can exceed over one million pounds. The oilfield casing centralization tool includes a push jack assembly, an anchoring jack assembly, and an elongated structural member. The anchoring jack assembly allows a user to fully secure the oilfield casing centralization tool to a bolt hole of the wellhead. With the oilfield casing centralization tool fully secured to the wellhead, the push jack assembly allows a user to push the casing a desired distance in order to center the casing within a wellbore. The elongated structural member serves as a rigid hub for the push jack assembly and the anchoring jack assembly.

An oilfield casing centralization tool allows a user to center the casing to install the casing hanger into the bowl profile of a wellhead to support the weight of the casing which can exceed over one million pounds. The oilfield casing centralization tool includes a push jack assembly, an anchoring jack assembly, and an elongated structural member. The anchoring jack assembly allows a user to fully secure the oilfield casing centralization tool to a bolt hole of the wellhead. With the oilfield casing centralization tool fully secured to the wellhead, the push jack assembly allows a user to push the casing a desired distance in order to center the casing within a wellbore. The elongated structural member serves as a rigid hub for the push jack assembly and the anchoring jack assembly.

A flow tube for a control head for an apparatus (1) for forming a liquid seal around a conduit, cable or wire for intervention into a well, the flow tube comprising a flexible body (16) capable of stretching to accommodate localised variations in the external diameter of the conduit, cable or wire while maintaining a close contact with the external surface of the conduit, cable or wire.

A packing arrangement and a method are disclosed, in which a packing assembly of a reciprocating plunger pump is accessible, removable and adjustable from the front end of the fluid-end. As the inside and outside diameter of the packing rings define the area on which the pressure is exerted and results in the total force on the packing arrangement, a packing arrangement with a smaller outside diameter can be advantageous as the forces are reduced and a longer packing life can be expected.

A surface safety valve for a well system includes a main valve body with a central bore through it. The main valve body has a centerline axis and is configured to be connected at a surface location above a surface of the Earth to a surface assembly of the well system and to receive through the central bore a flow of wellbore fluid from a subterranean zone conveyed by a production tubing. A gate is positioned within the main valve body and is configured to move from an open position in which the gate does not block flow of wellbore fluid through the central bore to a closed position in which the gate blocks flow of wellbore fluid through the central bore. The gate travels from the open position to the closed position along a gate movement axis perpendicular to the centerline bore axis. The gate includes a gate front end positioned on a first side of the centerline bore axis and a gate back end positioned on a second side of the centerline bore axis opposite the first side. The surface safety valve also includes an actuator positioned on the first side of the centerline bore axis. The actuator is configured to selectively push the gate towards the open position. The safety valve also includes a spring enclosed within the main valve body and positioned on the second side of the centerline bore axis. The spring is connected to the gate back end and is configured to bias the gate towards the closed position.

A borehole tool including a unitary, single-piece basepipe having a first end portion, a second end portion, and an intermediate portion between the first end portion and second end portion, the first and second end portions being of larger diameter than the intermediate portion, an operational member having a first end and a second end, the member disposed about the basepipe, the member having an outside diameter no greater than the first end portion and the second end portion. A method for making a screen including wrapping a wire around the basepipe, and forming the filtration media with the wire. A borehole system including a borehole in a subsurface formation, a string disposed in the borehole, and a tool disposed within or as a part of the string.