Halliburton Company

Eric P Lubitz

David Durward Szarka

Ernest E Carter, Jr

Robert L Jessup

Scott T MacLaughlin

A coiled tubing set inflatable packer, bridge plug and releasing tool therefor. The packer and bridge plug comprise an adapter with a mandrel slidably disposed therein. A pressure actuated piston releases a locking ball between the mandrel and adapter during an inflation cycle and allows movement of the mandrel such that the locking ball again locks the mandrel and adapter when the mandrel is moved to a sealed position wherein the inflatable packer element is sealingly closed. The inflatable packer of the present invention comprises a valve for opening a central passageway through the packer. A J-slot in the packer allows a plurality of inflation cycles to insure proper setting of the packer prior to actuation of the valve. The bridge plug of the present invention comprises a bypass passage therethrough which may be opened by upward movement of a central mandrel. A releasing tool is provided for releasing the packer or bridge plug in the well bore after setting of the packer element. A releasing plug or releasing ball is used to move a releasing mandrel and disengage locking dogs from an overshot on the releasing tool so that the releasing tool may be removed from the well bore.

Coiled tubing set inflatable packer, bridge plug and releasing tool

A retrievable gravel packer and retrieving tool therefor. The gravel packer includes an inner mandrel assembly attached to an operating tool by a left-hand threaded connection. The packer is set without rotation by the operating tool to move a pusher sleeve downwardly with respect to the mandrel, compressing a packer element and setting slips into engagement with a well bore. A ratchet prevents the pusher sleeve assembly from moving upwardly with respect to the mandrel. The packer may be retrieved by the retrieving tool which has a lower collet engagable with a releasing mandrel in the packer. After releasing collets held by the releasing mandrel, the inner mandrel of the packer is released so that the packer element and slips engaged by the mandrel are disengaged from the well bore. An upper collet in the retrieving tool engages the left-hand thread in the packer mandrel so that the packer and retrieving tool may be raised out of the well bore. If the packer becomes jammed and cannot be retrieved in this manner, the retrieving tool may be further raised so that the lower collet in the retrieving tool is released from the releasing mandrel in the packer. The packer includes antirotation pins so that is can be easily milled out of the well bore.

Retrievable gravel packer and retrieving tool

Surface packer and method for using the same. An annular body is mounted on the upper end of a string of casing which extends above a drilling rig platform. An annular seal is received within the body at the upper end thereof and may be sealed against the radially outer surface of a string of drill pipe which is lowered therethrough into the casing. A radial circulation port is formed in the body beneath the annular seal. In a cementing operation, a string of drill pipe is lowered in the casing to the lower end thereof and the annular seal is sealed thereagainst. The pipe-casing annulus is pressurized and cement is pumped into the drill pipe for cementing the casing into the well bore. In one embodiment, the annular seal is of the inflatable type which permits vertical and rotational manipulation of the pipe string while maintaining the seal thereagainst.

Growing community of inventors

Duncan, OK, United States of America

Eric P Lubitz