Tubing hanger - production tubing suspension arrangement
AssigneeArgus Subsea, Inc.
InventorBrian A. Sneed
Life of this patent
Estimating the term…
Abstract
A tubing hanger body made from Non-CRA steel coupled to production tubing made from CRA material. The coupling includes pin threads at the top end of the production tubing which are arranged to be screwed into box threads of the tubing hanger body. A seal sub having metal-to-metal and/or elastomeric seals engages the top end of the production tubing and protects the tubing hanger body from contact with production fluid flowing from the production tubing below to a Christmas tree tubing above. The invention includes a method of repairing of an existing tubing hanger body where its through bore has been damaged. This allows the through bore to be over machined and a CRA sleeve installed to replace tubing threads and body material.
Claims4
An arrangement for completing an oil and gas well comprising
- a tubing hanger body (120) made from non-CRA steel, and
- a production tubing (200) made for CRA material coupled to said tubing hanger.
A method of correcting manufacturing defects of a tubing hanger body comprising the steps of
- over-machining a central bore of a tubing hanger body 12 of CRA material, thereby eliminating pin threads (5) of said tubing hanger body (12),
- installing a sleeve of CRA material within said control bore, said sleeve having pin threads cut in the bottom portion of the sleeve, said pin threads arranged are designed to be screwed into box threads (6) of production tubing.
Dependencies are inferred from the claim text.