Tetra Technologies, Inc.

Other

National Oilwell, Inc.

John Keith Caulfield

Patrick William Brown

A method for pulling a crown plug that includes the steps of providing a subsea lubricator having a longitudinal through bore; providing a jacking string with a landing sub and a crown plug connector; lowering the subsea lubricator to a christmas tree and lowering the jacking string to the lubricator, and, connecting the plug connector to the crown plug; jacking up the jack such that tensile forces cause the crown plug to be released from the christmas tree; raising the jacking string and crown plug and detaching the crown plug from the crown plug connector.

Method for pulling a crown plug

Provided is a method and apparatus for pulling a crown plug from a subsea horizontal christmas tree, the method comprising: (a) providing a subsea lubricator having a longitudinal through bore and a jack attached to the subsea lubricator, the jack having a landing area, and the landing area having an opening which is fluidly connected to the lubricator's through bore; (b) providing a jacking string which includes a landing sub and a crown plug connector, the sub having a landing surface; (c) without the jacking string in step 'b', lowering the subsea lubricator of step 'a', to the horizontal christmas tree and attaching the lubricator to the christmas tree; (d) lowering the jacking string to the lubricator, and, while the landing surface of the landing sub is spaced above and not supported by the landing area of the jack, connecting the plug connector to the crown plug while the landing sub is above and not touching the landing area of the jack; (e) jacking up the jack such that the landing area of the jack contacts the landing surface of the landing sub, and pushes up on the jacking sub and jacking string causing tensile forces to be placed on the crown plug and releasing the crown plug from the profile of the christmas tree; (f) while the lubricator remains attached to the christmas tree, raising the jacking string and crown plug through and out of the lubricator and to the surface of the water to remove the tree; and (g) detaching the crown plug from the crown plug connector.

Method and apparatus for pulling a crown plug

Method for pulling a crown plug from a subsea tree

Provided is a method and apparatus for pulling a crown plug comprising: (a) providing a subsea lubricator having a longitudinal through bore and a jack attached to the subsea lubricator, the jack having a landing area; (b) providing a jacking string which includes a landing sub and a crown plug connector, the sub having a landing surface; (c) without the jacking string in step 'b', lowering the subsea lubricator of step 'a', to the horizontal christmas tree and attaching the lubricator to the christmas tree; (d) lowering the jacking string to the lubricator; (e) jacking up the jack such that the landing area of the jack contacts the landing surface of the landing sub; and (f) while the lubricator remains attached to the christmas tree, raising the jacking string and crown plug through and out of the lubricator.

Apparatus having removable posts for guiding subsea well equipment. The apparatus includes a frame for permanent attachment to a well installation. The frame includes outwardly extending legs with each of the legs for receiving an upstanding retrievable guide post. Each leg includes a latching mechanism and a guide foot for receiving an upstanding guide post. The latching mechanism includes a retainer rotatable between a latching position, a latched position and an unlatched position. The latching mechanism preferably includes a handle connected to the retainer with the retainer being rotatably connected to the top of the frame. The retainer may include a beam for engaging a shoulder on the guide post when in the latched position. The handle is in a downward position when the retainer is in the unlatched position prior to the guide post being seated in the guide foot.

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Houston, TX, United States of America

John Keith Caulfield