A petroleum well toolstring valve includes a drill pipe string conveyed J-slot running tool for a top stinger on a retrievable bridge plug. The J-slot running tool includes a J-slot sleeve with J-slots for disconnectably receiving the stinger. The top stinger includes a cylindrical stinger portion with J-slot connecting lugs. An internal plug is arranged between a central connector and stinger bores. A cylindrical neck on the stinger portion spans the internal plug in the axial direction. The cylindrical neck, when covered by the J-slot sleeve, forms an annular flow space connecting upper and lower radial ports and thus central bores. The stinger portion has a rotatable sleeve valve body arranged on a stinger valve stem portion. The sleeve valve body has a sleeve valve port arranged for being aligned with the lower stinger port when rotated into an open position. The rotatable sleeve valve body is connected to the lugs for being rotated by the drill pipe string for opening or closing the valve.

A downhole tool with an object positioned within a shearable housing. More specifically, embodiments are directed towards an upper portion of the shearable housing that is configured to be separated from an insert responsive to flowing back through the frac plug.

A frac plug with a flapper positioned within a shearable housing. More specifically, embodiments are directed towards an upper portion of the shearable housing that is configured to be separated from an insert responsive to flowing back through the frac plug.

Embodiments described herein provide an expanding and collapsing apparatus and methods of use. The apparatus includes a plurality of elements assembled together to form a ring structure about a longitudinal axis. The ring structure is operable to be moved between an expanded condition and a collapsed condition by movement of the plurality of elements. At least one set of structural elements are operable to move between the expanded condition and the collapsed condition by movement of a first end in an axial direction, and by movement of a second end in a radial dimension. In certain embodiments, the plurality of elements includes at least one set of structural elements extending longitudinally on the apparatus and operable to slide with respect to one another. Applications of the embodiments described herein include oilfield devices, including anti-extrusion rings, plugs, packers, locks, patching tools, connection systems, and variable diameter tools run in a wellbore.

Acid stimulation operations in a wellbore may be conducted using frac plugs constructed of a hydrolytically degradable polymer. The frac plugs may be constructed of an aliphatic polyester such as PGA and may be readily pumped into position in the wellbore due in part to their relatively low density. Once perforations have been created in the wellbore and a first frac plug is set in place, an acid solution may be pumped at a high-pressure acid against the frac plug and into the geologic formation. A second and/or any number of subsequent frac plugs may be pumped behind the acid, e.g., in brine solution, to be used in subsequent acid stimulation operations. After completing acid stimulation operations, the frac plugs may degrade in the wellbore to permit production.

A plugging assembly includes a plug and a setting tool attached directly to the plug, wherein the plug includes an elongate core with an uphole end and a downhole end opposite the uphole end, a sealing element disposed fully around the core to seal against the casing, an anchoring system for anchoring the plug to the casing in a fixed position, a compression fitting disposed around the core at or near the uphole end of the core, a nose at the downhole end of the core, and the setting tool includes an elongate housing extending between an uphole end and a downhole end opposite the uphole end, an open passageway extending from the uphole end to the downhole end of the housing, and the downhole end of the housing is aligned to directly engage the compression fitting of the plug.

A frac plug with a flapper positioned within a shearable housing. More specifically, embodiments are directed towards an upper portion of the shearable housing that is configured to be separated from an insert responsive to flowing back through the frac plug.

A buoyancy assist tool has an outer case and a rupture disk connected in the outer case. A sleeve is disposed in the outer case and movable from first to second position in the outer case. A rupture disk membrane of a rupture disk prevents the sleeve from moving to the second position prior to the rupture disk membrane rupturing. The outer case is configured to be connected in a well casing. A lock ring holds the sleeve in the first position.

A dual plug system comprises a bottom plug and a top plug. The bottom plug comprises, a bottom plug mandrel, a plurality of first fins, and a first seat. The plurality of first fins is disposed between a first end and a second end of the bottom plug mandrel, and the first seat is disposed at the second end The top plug comprises a first end and a second end. The top plug further comprises a top plug mandrel, a plurality of second fins, a collar, and a sleeve. The plurality of second fins is disposed around the top plug mandrel covering at least a portion of the length of the top plug mandrel, and the collar is coupled to the top plug mandrel The dual plug system further comprises a connector, wherein the connector is coupled to the first end of the top plug.

Apparatus and methods are provided relating bottom hole assemblies (BHA) electrically connected to a wireline. The BHA adapted for manipulating one or more target sleeve valves spaced along a wellbore having a sleeve shifting tool and a sealing element. The system can be shifted open by fluid pressure or electrically actuated stroking and closed by electrically actuated stroking. Methods of deploying a BHA for fracturing operations connected by wireline in a casing of a wellbore are also provided including obtaining real time sensor data from the BHA.