Anchor Latch on Off For Sucker Rods
AssigneeWeatherford/Lamb, Inc.
InventorJeffrey Lembcke
Life of this patent
Estimating the term…
Abstract
A device and method to allow a sucker rod to be disconnected at a particular point in a sucker rod string. Typically the disconnect device is located just above the barrel pump where the disconnect device is able to provide tensile and compressive strength similar to the sucker rod string thereby eliminating at least one failure mode for the sucker rod string.
Claims16
An apparatus for disconnecting a sucker rod comprising:
- an upper section;
- wherein the upper section has an upper end and a lower end;
- further wherein the upper end has a first threaded section and the lower end has a second threaded section threaded in the opposite direction of the first threaded section;
- a lower section;
- wherein the lower section has an upper end and a lower end;
- further wherein the lower end has a third threaded section and the upper end has a fourth threaded section threaded in the opposite direction of the third threaded section;
- and
- the second threaded section and the fourth threaded section cooperate to join the upper section and the lower section.
An apparatus for reconnecting a sucker rod comprising:
- a lower section having an interior, an upper end, and a lower end;
- wherein the interior of the lower end has a first threaded section and interior of the upper end has a second threaded section that is threaded in the opposite direction of the first threaded section;
- an upper section having an interior, an upper end, and a lower end;
- wherein the interior of the upper end has a third threaded section;
- a reinforcing member having an exterior, an upper end, and a lower end, and a recess;
- wherein the exterior of the upper end of the reinforcing member is attached to the interior of the lower end of the upper section and the exterior of the lower end of the reinforcing member has a bias device;
- further wherein the recess is located between the lower end of the upper section and the bias device;
- at least one retaining collet having an interior, an exterior, an upper end, and a lower end;
- wherein the exterior lower end has a fourth threaded section that cooperates with the threads of the second threaded section;
- further wherein the interior of the lower end has a shoulder that cooperates with the bias device;
- and
- the retaining collet is located in the recess such that the bias device provides force in the radial outward direction against the shoulder.
A method of reconnecting a sucker rod string comprising:
- attaching a disconnect assembly to a sucker rod string;
- rotating the sucker rod string in a first direction;
- removing the upper portion of the disconnect assembly from the wellbore;
- attaching a reconnect assembly to the sucker rod string;
- running the reconnect assembly into a wellbore;
- stabbing the reconnect assembly into a lower end of the disconnect assembly;
- and
- locking the reconnect assembly to the lower end of the disconnect assembly.
The method of claim (14) wherein the external threaded surface has threads that have a lower surface that extends from the radially inward lower end of each thread radially outward to radially outwards upper end of each thread.
Dependencies are inferred from the claim text.