Limit clamp for use with casing attachments
AssigneeHalliburton Energy Services, Inc.
InventorsHenry E. Rogers, Earl D. Webb
Life of this patent
Estimating the term…
Abstract
A limit clamp for securing a tool to a casing having a groove in its outer surface. The limit clamp comprises a block having a base and a flange. The base is positioned in the groove to contact at least one stop in the groove and the flange extends out of the groove. The limit clamp also comprise a lock ring encircling the block and the casing, wherein the lock ring engages the block.
Claims38
A method of securing a tool to a pipe, the method comprising:
- forming a groove in an exterior surface of the pipe, wherein the groove comprises a bottom and at least one stop;
- positioning a block in the groove so that a base of the block fits in the groove to contact the at least one stop and a flange of the block extends out of the groove;
- locking the block in the groove with a lock ring which encircles the block and the pipe and engages the flange of the block, wherein the locking comprises moving at least a portion of the lock ring over at least a portion of the block, elastically stretching at least a portion of the lock ring as it moves over at least a portion of the block, and then rebounding the stretched portion of the lock ring;
- and
- mounting the tool on the pipe so as to be retained by a member of a group consisting of the block and the lock ring.
A limit clamp for securing a tool to pipe, the limit clamp comprising:
- a groove in an outer surface of the pipe comprising a bottom and at least one stop, wherein the groove comprises an annular groove extending entirely around the pipe;
- a block comprising a base positioned in the groove to contact the at least one stop and a flange which extends out of the groove;
- and
- a lock ring encircling the block and the pipe, wherein the lock ring engages the flange of the block.
A centralizer of a pipe within a borehole, the centralizer comprising:
- at least one ring larger than the outside diameter of the pipe;
- a plurality of bows connected to the at least one ring;
- a limit clamp connectable with the pipe for engaging the at least one ring, wherein the limit clamp comprises:
- a groove in an outer surface of the pipe comprising a bottom and at least one stop;
- a block comprising a base positioned in the groove to contact the at least one stop and a flange which extends out of the groove;
- and
- a lock ring encircling the block and the pipe, wherein the lock ring engages the flange of the block, wherein the lock ring comprises:
- an annular band defining a load bearing surface, and
- a lock flange extending radially inward from the annular band.
A centralizer sub comprising:
- a base pipe;
- a groove in an exterior surface of the base pipe, wherein the groove comprises a bottom and at least one stop;
- a block comprising a base which fits in the groove to contact the at least one stop and a flange which extends out of the groove;
- a lock ring encircling the block and the base pipe and engaging the flange of the block, wherein the lock ring comprises an annular band and a ramp extending radially inward from the annular band;
- and
- a centralizer mounted to the base pipe and retained by a member of a group consisting of the block and the lock ring.
Dependencies are inferred from the claim text.