Otis Engineering Corporation

Halliburton Company

Andrew R Lane

Colby M Ross

Richard M Sproul

R Brooks Wheeler

Ronald C Sadlin

Alan T Jackson

Rufus Mullins, Jr

A hanger assembly used to support tubing, such as a siphon string, and other tools beneath the surface of a wellbore within casing or production tubing. The assembly includes a setting mechanism having first and second sleeves responsive to increased pressure for moving relative to one another for activating a slip assembly and sealing element. The setting mechanism is connected to reeled tubing by a quick disconnect device defining a passage for permitting fluid flow from the surface of the wellbore to the setting mechanism to provide hydraulic activation. The disconnect device is responsive to increased pressure within the passage for disconnecting the reeled tubing from the setting mechanism.

Siphon string assembly compatible for use with subsurface safety devices

A packer slip has multiple anchor studs which are press fit in an interference union onto a slip plate constructed of a corrosion resistant alloy material. The anchor studs are located on the slip plate in such a manner as to distribute applied load forces evenly onto the well casing. The anchor studs have ribs formed by longitudinal serrations, with the stud body and ribs being truncated along a planar face, thereby producing a cutting edge for penetrating and gripping a well casing, which is also constructed of corrosion resistant alloy material. The ribs are separated circumferentially by longitudinal grooves formed in the main body portion of each stud. According to this arrangement, the grooves provide flow space for rib material which flows in response to compression forces arising as a press-fit interference union is produced. Each stud is made of a material which has a hardness which is substantially greater than the hardness of CRA alloy casing material, such as carbide compounds including refractory carbides and cemented refractory carbides.

Packer slips for CRA completion

A dual string packer for releasable, hydraulic setting within a wall casing is disclosed. The packing seal elements and hydraulic actuator assembly are mounted for sliding movement along primary and secondary packer mandrels. Setting forces are applied to the packing seal elements by a setting cylinder which is mounted for slideable, sealing engagement against the primary and secondary packer mandrels, and setting forces are applied to the anchor slips by a piston which is sealed against the primary and secondary packer mandrels. The set condition is maintained by a pair of locking rods and segmented ratchet slips. The locking rods are carried by the setting cylinder head and are retracted axially out of piston pockets as a variable volume pressure chamber is pressurized. Upon achieving set engagement of the anchor slips and seal elements, the locking rods are trapped in compression between the head of the setting cylinder and the segmented ratchet slips. The locking rods are compressed by the reaction forces imposed by the expandable seal elements through the head of the setting cylinder, and by the retraction forces transmitted through the anchor slips and piston.

Dual hydraulic set packer

Growing community of inventors

Houston, TX, United States of America

Andrew R Lane