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Title:
ADJUSTABLE LENGTH DISCHARGE JOINT FOR HIGH PRESSURE APPLICATIONS
Document Type and Number:
WIPO Patent Application WO/2009/130440
Kind Code:
A3
Abstract:
An adjustable length joint for high-pressure applications is described that includes rigid inner and outer tubes; both having passages there through. The rigid outer tube has at least one peripheral ring groove within its inner wall. The tubes have threads, which are adapted to adjustably engage with one another securely at a working pressure of at least about 689 bar. The rigid inner tube and the rigid outer tube are rotatable to enable adjustable engagement between the threads. The joint also includes an O-ring seated in each of the at least one peripheral ring grooves. When the rigid inner tube and the rigid outer tube are held in a selectable position, the first thread and the second thread overlap a sufficient distance necessary for the first thread and the second thread to withstand the forces exerted by the internal pressure within the joint at the working pressure.

Inventors:
BULL, Brad, R. (902 Palm, Duncan, OK, 73533, US)
KENDRICK, William, D. (1401 Mimosa, Duncan, OK, 73533, US)
Application Number:
GB2009/000927
Publication Date:
March 17, 2011
Filing Date:
April 08, 2009
Export Citation:
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Assignee:
HALLIBURTON ENERGY SERVICES, INC. (P.O. Box 1431, Duncan, Oklahoma, 73533, US)
BULL, Brad, R. (902 Palm, Duncan, OK, 73533, US)
KENDRICK, William, D. (1401 Mimosa, Duncan, OK, 73533, US)
CURTIS, Philip, Anthony (A A Thornton & Co, 235 High Holborn, London WC1V 7LE, GB)
International Classes:
E21B17/02; E21B17/042; E21B17/07; F16L15/00
Foreign References:
US4281858A1981-08-04
US4805696A1989-02-21
US4846270A1989-07-11
US4403654A1983-09-13
Attorney, Agent or Firm:
CURTIS, Philip, Anthony et al. (A A Thornton & Co, 235 High Holborn, London WC1V 7LE, GB)
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