Overshot assembly and systems and methods of using same
AssigneeLongyear TM, Inc.
InventorsChristopher L. Drenth, Anthony LaChance, George Iondov
Life of this patent
Estimating the term…
Abstract
An overshot assembly for operative coupling to a wireline and a head assembly within a drilling system. The overshot assembly has at least one latch member that securely engages the inner surface of the head assembly without the use of a spearhead.
Claims22
A drilling system for use in a drilling formation, comprising:
- a head assembly having a longitudinal axis, an outer surface, an inner surface, and a proximal end, the inner surface of the head assembly defining a central bore, the proximal end of the head assembly defining an opening in operative communication with the central bore;
- and
- an overshot having a distal portion configured for receipt within the central bore of the head assembly, the distal portion of the overshot comprising at least one latch member configured for movement about and between a latched position and a retracted position,
- wherein the inner surface of the head assembly is configured for secure engagement with the at least one latch member of the overshot when the at least one latch member is positioned in the latched position, and
- wherein, upon secure engagement between the at least one latch member of the overshot and the inner surface of the head assembly, the head assembly is operatively coupled to the overshot such that movement of the overshot results in a corresponding movement of the head assembly.
An overshot assembly for operative coupling to a head assembly within a drilling system, the head assembly having a proximal end defining an opening and an inner surface defining a central bore of the head assembly, the overshot assembly comprising:
- an elongate body having a wall and an outer surface, the wall of the elongate body defining a central bore of the elongate body and at least one distal radial opening extending from the outer surface to the central bore of the elongate body;
- a driving member positioned at least partially within the central bore of the elongate body, the driving member having a longitudinal axis and a first wedge portion, the first wedge portion defining at least one driving surface, each driving surface of the at least one driving surface of the first wedge portion being tapered relative to the longitudinal axis of the driving member;
- and
- at least one latch member configured for receipt within the at least one distal radial opening of the elongate body, each latch member of the at least one latch member being positioned in engagement with a corresponding driving surface of the first wedge portion of the driving member,
- wherein, upon movement of the driving member in a first direction substantially parallel to the longitudinal axis of the driving member, the at least one driving surface of the driving member is configured to wedge the at least one latch member between the inner surface of the head assembly and the at least one driving surface such that the overshot securely engages the inner surface of the head assembly.
An overshot assembly for operative coupling to a head assembly within a drilling system, the head assembly having a proximal end defining an opening and an inner surface defining a central bore of the head assembly, the overshot comprising:
- an elongate body having a wall and an outer surface, the wall of the elongate body defining a central bore of the elongate body and at least one proximal radial opening extending from the outer surface to the central bore of the elongate body;
- a driving member positioned at least partially within the central bore of the elongate body, the driving member having a longitudinal axis and a first wedge portion, the first wedge portion defining at least one driving surface, each driving surface of the at least one driving surface of the first wedge portion being tapered relative to the longitudinal axis of the driving member;
- at least one locking member configured for receipt within the at least one proximal radial opening of the elongate body, each locking member of the at least one locking member being positioned in engagement with a corresponding driving surface of the first wedge portion of the driving member;
- and
- a locking sleeve having an inner surface configured for engagement with the outer surface of at least a portion of the elongate body, the locking sleeve being configured for rotational movement relative to the outer surface of the elongate body about and between a locked position and an unlocked position,
- wherein, in the locked position, the at least one driving surface of the driving member is configured to wedge the at least one locking member between the inner surface of the locking sleeve and the at least one driving surface such that the elongate body is prevented from rotating relative to the locking sleeve, and
- wherein, in the unlocked position, the elongate body is configured for rotation relative to the locking sleeve.
An overshot for use in a drilling system, the drilling system having a wireline and a head assembly, the head assembly having a proximal end defining an opening and an inner surface defining a central bore of the head assembly, the overshot comprising:
- a proximal portion configured for coupling to the wireline;
- a distal portion coupled to the head assembly;
- and
- a pivot joint element positioned between and coupled to the proximal portion and the distal portion of the overshot,
- wherein the distal portion is configured for pivotal movement in at least two planes relative to the proximal portion.
Dependencies are inferred from the claim text.