Provided, in one embodiment, is a pulling prong. The pulling prong, in one example, includes an outer housing, and a nose assembly slidably located within the outer housing. In this example, the nose assembly and outer housing form an activation chamber. The pulling prong, in this example, may further include activation means located within the activation chamber, the activation means configured to move the nose assembly from a first running configuration to a second retrieving configuration.

A convertible fishing tool is provided for removing an object (fish) from a wellbore. The fishing tool includes an elongated hollow main housing and a plurality of slip blades that are disposed distal to the main housing and move radially between fully retracted positions and fully extended positions. In the fully retracted positions, the fishing tool is in spear configuration and in the fully extended positions, the fishing tool is in an overshot configuration. The fishing tool also includes an actuation system configured to move the plurality of slip blades in a radial direction between the fully retracted positions and the fully extended positions.

A wireline recovery tool for retrieving a wireline from a wellbore includes an outer sheath and a rotatable spear positioned within the outer sheath. The rotatable spear includes a plurality of angled portions and a plurality of vertical portions such that the rotatable spear has an asymmetrical profile. The outer sheath includes a first and second wall, each of which includes an inner surface and an outer surface. A plurality of angled prongs extend from the inner surfaces of the first and second walls. A torque device including an indexing mechanism and ratcheting mechanism rotates the rotational spear positioned within the outer sheath. As the rotatable spears rotates, the wireline being retrieved from the wellbore becomes increasingly entangled with the rotatable spear and outer sheath, such that the wireline can be removed from the wellbore.

Provided are wiper plugs with removable cores and methods of using the wiper plugs with removable cores. An example wiper plug with a removable core comprises a molded body, a wiper, a cavity through the interior of the molded body, a support disposed in the cavity, and the removable core disposed in the cavity. An example method of use comprises removing the core of the wiper plug without drilling through the wiper plug, and leaving the remainder of the wiper plug in the wellbore.

Provided are wiper plugs with removable cores and methods of using the wiper plugs with removable cores. An example wiper plug with a removable core comprises a molded body, a wiper, a cavity through the interior of the molded body, a support disposed in the cavity, and the removable core disposed in the cavity. An example method of use comprises removing the core of the wiper plug without drilling through the wiper plug, and leaving the remainder of the wiper plug in the wellbore.

Apparatus and methods for drifting a plurality of cylindrical diameters are disclosed. The apparatus includes a first tubular with a first inner diameter and a first outer diameter. The apparatus further includes a second tubular with a second inner diameter and a second outer diameter, wherein the second outer diameter is smaller than the first inner diameter. The apparatus still further includes a first plurality of attachments that couples the first inner diameter of the first tubular and the second outer diameter of the second tubular, wherein the first plurality of attachments is removeable to allow the second tubular to translate along an axis relative to the first tubular.

Apparatus and methods for drifting a plurality of cylindrical diameters are disclosed. The apparatus includes a first tubular with a first inner diameter and a first outer diameter. The apparatus further includes a second tubular with a second inner diameter and a second outer diameter, wherein the second outer diameter is smaller than the first inner diameter. The apparatus still further includes a first plurality of attachments that couples the first inner diameter of the first tubular and the second outer diameter of the second tubular, wherein the first plurality of attachments is removeable to allow the second tubular to translate along an axis relative to the first tubular.

Elongate capsules for housing waste are configured for disposal (placement) into wellbore(s) that are located in particular deep underground geologic formation(s). These capsules have opposing structures for physically linking multiple capsules together in an end-to-end fashion. These opposing end structures may include a stinger with pins at a top end of the capsule; and a J-slots structure at the bottom end of the capsule. The stinger with pins of a first capsule may be (removably) attached to the J-slots of a second capsule. Further, a retrieval-tool also has the J-slots structure at one end. The J-slots structure of the retrieval-tool may be configured to (removably) attach to a stinger with pins of a given capsule (which may be linked to other capsule(s)); and then the retrieval-tool may be used to retrieve the given capsule(s) from a given wellbore. Capsule retrieval systems and/or method may utilize such capsule(s) and the retrieval-tool.

Elongate capsules for housing waste are configured for disposal (placement) into wellbore(s) that are located in particular deep underground geologic formation(s). These capsules have opposing structures for physically linking multiple capsules together in an end-to-end fashion. These opposing end structures may include a stinger with pins at a top end of the capsule; and a J-slots structure at the bottom end of the capsule. The stinger with pins of a first capsule may be (removably) attached to the J-slots of a second capsule. Further, a retrieval-tool also has the J-slots structure at one end. The J-slots structure of the retrieval-tool may be configured to (removably) attach to a stinger with pins of a given capsule (which may be linked to other capsule(s)); and then the retrieval-tool may be used to retrieve the given capsule(s) from a given wellbore. Capsule retrieval systems and/or method may utilize such capsule(s) and the retrieval-tool.

A plug for wellbore tubing includes: an internal portion; a first external portion which surrounds the internal portion; and a second external portion disposed axially adjacent to the first external portion, with respect to a central longitudinal axis of the plug. The second external portion expands to: engage an interior surface of the wellbore tubing in response to a trigger as the plug displaces downhole through the wellbore tubing; and open a passage to permit a fluid to progress to the first external portion. The first external portion expands to engage the wellbore tubing in response to the expansion of the second external portion and upon contact with the fluid. A related method includes providing such a plug, and displacing the plug downhole in the wellbore tubing.