An indexing valve system includes a first tubular having an outer surface portion, an inner surface portion defining a passage portion, and a plurality of indexing components. A second tubular is axially aligned with the first tubular. The second tubular includes an outer surface section, an inner surface section defining a passage section, and a plurality of indexing members that selectively inter-engage with the plurality of indexing components. The inner surface section including a plurality of indexing elements. An insert extends into, and is axially shiftable relative to, the passage portion and the passage section. The insert includes an outer surface supporting an indexer that selectively engages with the plurality of indexing elements to rotate the second tubular relative to the first tubular.

A system for locating a casing collar includes a drill pipe sub-assembly with a drill pipe segment and detection apparatus. The detection apparatus includes a bypass port disposed in a wall of the drill pipe segment; an annular sleeve which directs fluid through the bypass port and into a drill pipe segment interior portion; an actuator which opens and closes the bypass port; and two magnetized coils which generate an electromagnetic field. The actuator closes the bypass port in response to a predetermined voltage generated by the magnetized coils when they displace past a casing collar. Also included are a weight loss detection device which detects a loss of weight in the drill pipe segment, and a depth determination device which determines a depth of the casing collar, based on detected loss of weight. Also disclosed and described are a related method and drill pipe sub-assembly.

A barrier plug assembly for sealing a subterranean wellbore is located inside a tubing and can comprise a frangible barrier element stacked on a carrier ring, a locking sleeve located above the carrier ring and located in a closed fluid chamber, a valve located on the closed fluid chamber and in pressure communication with the tubing, a retaining device configured for locking the a carrier ring in place, a crushing element located a distance below the frangible barrier element and configured for crushing the frangible barrier element. The valve can be configured for allowing or preventing fluid communication in between the tubing and the fluid chamber.

The pump-activated manual water well comprises a valve, a gate structure, a pulley structure, a cord, and a well. The gate structure, the pulley structure, and the cord attach to the valve. The valve installs in the well. The well is a mechanical structure that pumps underground water, commonly called ground water, to the surface of the ground. The gate structure, the pulley structure, and the cord control the flow of water through the well by controlling the flow of water through the valve.

The pump-activated manual water well comprises a valve, a gate structure, a pulley structure, a cord, and a well. The gate structure, the pulley structure, and the cord attach to the valve. The valve installs in the well. The well is a mechanical structure that pumps underground water, commonly called ground water, to the surface of the ground. The gate structure, the pulley structure, and the cord control the flow of water through the well by controlling the flow of water through the valve.

A downhole device for installation in a petroleum well, comprising a sensor, a controller and a power source. The device further comprises an acoustic speaker configured to output a sound signal from the downhole device to a fiber optic cable in the well.

A downhole device for installation in a petroleum well, comprising a sensor, a controller and a power source. The device further comprises an acoustic speaker configured to output a sound signal from the downhole device to a fiber optic cable in the well.

Described herein are embodiments of systems and apparatuses that include a dart and/or a clutch for a dart plunger. In an exemplary embodiment, the clutch consists of a one-piece unit having a length, an outside diameter, and an inside diameter where at least a portion of the inside diameter is sized to create a frictional interface with a dart. The clutch may also include a gap, a slot, and/or a spiral cut. The dart may include a shaft having opposite ends and a shaft diameter that varies between the opposite ends.

Described herein are embodiments of systems and apparatuses that include a dart and/or a clutch for a dart plunger. In an exemplary embodiment, the clutch consists of a one-piece unit having a length, an outside diameter, and an inside diameter where at least a portion of the inside diameter is sized to create a frictional interface with a dart. The clutch may also include a gap, a slot, and/or a spiral cut. The dart may include a shaft having opposite ends and a shaft diameter that varies between the opposite ends.

A mechanically actuated tubing drain for service with oil wells, water wells, gas wells and/or thermal wells has a configuration in which the drain opens by operation of a bumper member which may be pulled upwardly to move a sleeve member which is initially positioned adjacent to a drain port, thereby sealing the drain port. Once the bumper member pushes the sleeve member upwardly, any fluid in the tubing above the drain port will drain from the tubing. The bumper member may be pulled upwardly either by upward movement of a rod string or by operation of a wireline or slickline tool. The mechanically actuated drain does not require a tubing anchor to operate.