A collet device with an adjustable snap value can have a tubular body and beams. The tubular body can have a main body, an inner member in an inner area of the main body, and an outer member in an area external to the main body. The inner member and the outer member can each be axially moveable relative to the main body. The beams can be axially coupled to the main body, and a portion of the beams may extend axially from the tubular body. A length of the portion of the beams that extend axially from the tubular body can be adjustable by moving the inner member or the outer member for changing a snap value of the collet. The snap value corresponding to a magnitude of force exertable by the beams in a direction of a mating body that can be positioned radially adjacent to the beams.

An overshot tool for releasable connection to a head assembly as part of a core barrel drilling apparatus. The overshot tool comprises a primary engaging portion and a secondary engaging portion and is configured for the automated coupling and de-coupling to a head assembly via selected engagement of the head assembly by the engaging portion. The overshot tool is configured to both deliver and retrieve a head assembly from a latched position at a cutting end the core barrel.

A method according to one or more aspects of the disclosure includes actuating a slip device to grip a tubular extending through a bore, the slip device has an upper set of slips spaced axially above a lower set of slips and the actuating includes radially moving in unison the upper and the lower sets of slips from an open position to an extended position gripping the tubular.

A method according to one or more aspects of the disclosure includes actuating a slip device to grip a tubular extending through a bore, the slip device has an upper set of slips spaced axially above a lower set of slips and the actuating includes radially moving in unison the upper and the lower sets of slips from an open position to an extended position gripping the tubular.

A gripping assembly for a fishing tool which includes first and second end members and a plurality of gripping members which are retained by the first and second end members and which are moveable between a radially expanded configuration and a radially restricted configuration by rotation of the second end member with respect to the first end member.

A gripping assembly for a fishing tool which includes first and second end members and a plurality of gripping members which are retained by the first and second end members and which are moveable between a radially expanded configuration and a radially restricted configuration by rotation of the second end member with respect to the first end member.

An apparatus for use in a well includes a tubular mandrel configured to connect to a downhole assembly. An outer hub is configured to attach to a wellhead and has a bore therethrough. An inner housing is disposed on the tubular mandrel and configured to attach the outer hub to the wellhead. A clutch assembly is disposed within the bore of the outer hub and movable between a locked position and an unlocked position, wherein the tubular mandrel is rotatable relative to the inner housing to operate the downhole assembly in the unlocked position.

An apparatus for use in a well includes a tubular mandrel configured to connect to a downhole assembly. An outer hub is configured to attach to a wellhead and has a bore therethrough. An inner housing is disposed on the tubular mandrel and configured to attach the outer hub to the wellhead. A clutch assembly is disposed within the bore of the outer hub and movable between a locked position and an unlocked position, wherein the tubular mandrel is rotatable relative to the inner housing to operate the downhole assembly in the unlocked position.

A core barrel head assembly including an upper body comprising a central passage. A pair of latches is arranged in the central passage. Each latch pivots about a pivot point at a first end. Each latch includes a latch release at a second end and an outer tube surface engaging surface between the first end and the second end. A retracting case includes a first end configured to engage at least the latch release of the latches. The outer tube surface engaging surface of each latch extends through a latch slot in an outer wall of the upper body and such that the latches rotate about the pivot point. The latches are movable between an extended position and retracted position by the retracting case with a mechanical advantage.

A core barrel head assembly including an upper body comprising a central passage. A pair of latches is arranged in the central passage. Each latch pivots about a pivot point at a first end. Each latch includes a latch release at a second end and an outer tube surface engaging surface between the first end and the second end. A retracting case includes a first end configured to engage at least the latch release of the latches. The outer tube surface engaging surface of each latch extends through a latch slot in an outer wall of the upper body and such that the latches rotate about the pivot point. The latches are movable between an extended position and retracted position by the retracting case with a mechanical advantage.