Systems and methods for retrieving equipment from a wellbore of a subterranean well include an overshot housing having a central axis. The overshot housing is a tubular shaped member with a housing bore. An internal sleeve is located within the overshot housing. The internal sleeve is a tubular shaped member with a sleeve bore. The internal sleeve is axially moveable within the overshot housing. A catching net is located radially outward of the internal sleeve, within the overshot housing. The catching net moveable between a contracted position and an extended position. The catching net has a shorter axial length and a wider radial width in the contracted position than in the extended position. An anchoring assembly is located at a downhole end of the catching net. The anchoring assembly is actuable to releasably secure the downhole end of the catching net to the equipment.

A coiled tubing venturi junk basket tool is described The coiled tubing venturi junk basket tool retrieves junk, debris and/or wireline from a wellbore. A collection housing or waste basket is removeably coupled to the venturi body. The collection housing (waste basket) is customizable for volume, hole diameter and the type of junk and debris retrieved. An elastomeric trap is used to retain junk and debris in the collection housing. The collection housing is also interchangeable with a grab housing for retrieving wireline.

The present invention discloses a petroleum instrument hoisting system and a hoisting head, which is used for hoisting a petroleum instrument. The hoisting head includes: a lifting part, for connecting a lifting rope; an insertion rod, which is located under the lifting part and used for protruding into a stair-shaped hoisting hole, and is set with a notch on both sides thereof; a insertion head, which is connected with the insertion rod via a connecting rod, wherein the insertion rod is set with a slide opening that is in sliding fit with the connecting rod, and the lateral surface of one end of the insertion rod that is adjacent to the connecting rod is a conical surface; a coniform extension spring, which is sleeved on the insertion rod and the connecting rod, wherein one end thereof with a large cross-sectional area is sleeved on the insertion rod, and the other end thereof with a small cross-sectional area is sleeved on the connecting rod and is fixed relative to the connecting rod; two clamping pieces, which are respectively hinged in two notches, and the clamping face thereof can be in hooking fit with a hooking face in the horizontal plane; two pulling ropes, which are respectively connected with the other end of the corresponding clamping piece, and the orientations of the other ends, which are connected with the pulling ropes, of the two clamping pieces are opposite to each other. By the above solution, the hoisting of a petroleum instrument can be solved.

A system includes a spear hook for gripping into a compacted wireline, a spear that deploys the spear hook, and a hook hinge rotatably coupling the spear hook to the spear. The tool also includes a hook activator mounted in the spear to cause expansion and contraction of the spear hook. The spear hook expands and contracts along a path defined by the hook hinge in a radial direction from a spear outer surface of the spear. The tool also includes a compaction component, coupled to the spear, for compacting a wireline to form the compacted wireline.

A system includes a spear hook for gripping into a compacted wireline, a spear that deploys the spear hook, and a hook hinge rotatably coupling the spear hook to the spear. The tool also includes a hook activator mounted in the spear to cause expansion and contraction of the spear hook. The spear hook expands and contracts along a path defined by the hook hinge in a radial direction from a spear outer surface of the spear. The tool also includes a compaction component, coupled to the spear, for compacting a wireline to form the compacted wireline.

Systems and methods presented herein generally relate to advanced fishing of downhole cables, for example, using camera assemblies to monitor the relative position of a fishing tool with respect to cable wire in substantially real time. For example, systems and methods presented herein include a fishing tool that includes a body portion having a plurality of wire grabbing elements extending therefrom. The wire grabbing elements are configured to penetrate and latch onto cable wire disposed within a borehole of an oil and gas well system. The fishing tool also includes one or more camera assemblies configured to capture images downhole with respect to the fishing tool within the borehole.

A cable grab assembly includes a body having a longitudinally extending internal cavity disposed therein. A piston is disposed in the cavity and is axially moveable between a first position and a second position. At least two grab arms are hingedly attached to a bottom end of the body. A linkage assembly operatively couples the piston and the at least two grab arms such that movement of the piston between the first position toward the second position causes the at least two grab arms to pivot inward from an open position toward a closed position. A shear-pin restrains the piston to the first position. At least one spring element is disposed between the piston and an end of the cavity to shift the piston from the first position toward the second position to capture a broken cable when the shear-pin is sheared.

Methods, devices, and systems are discussed. In some cases, the methods may include conveying a downhole tool into a wellbore. The downhole tool includes a release sub disposed between a first section of the downhole tool and a second section of the downhole tool. The release sub includes: a first portion including a threaded pin and an electric motor, and a second portion including a threaded box where the threaded pin is threaded into the threaded box to couple the first portion to the second portion. The methods may further include causing the electric motor to rotate the threaded pin relative to the threaded box to decouple the first portion from the second portion, such that the first section of the downhole tool is at least partially detached from the second section of the downhole tool.

Methods, devices, and systems are discussed. In some cases, the methods may include conveying a downhole tool into a wellbore. The downhole tool includes a release sub disposed between a first section of the downhole tool and a second section of the downhole tool. The release sub includes: a first portion including a threaded pin and an electric motor, and a second portion including a threaded box where the threaded pin is threaded into the threaded box to couple the first portion to the second portion. The methods may further include causing the electric motor to rotate the threaded pin relative to the threaded box to decouple the first portion from the second portion, such that the first section of the downhole tool is at least partially detached from the second section of the downhole tool.

A wireline fishing tool is disclosed including a body, a side prong extending from a lateral side of the body, and a central prong extending from a center of the body. The central prong is movable relative to the body between an extended state and a retracted state. The central prong comprises a toothed shaft retractable with respect to the body to move the central prong from the extended state to the retracted state and a tooth movable relative to the toothed shaft between a stowed state in which the tooth is disposed within the toothed shaft and a deployed state in which the tooth extends from the toothed shaft. The tooth is movable from the stowed state toward the deployed state based on the central prong moving from the extended state to the retracted state.