The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 06, 1984
Filed:
Feb. 23, 1983
Rene F Goldaniga, Gignac, FR;
Geard Walter, Vaux le Penil, FR;
Bernard J Glotin, Saint Maur, FR;
Daniel Gallois, La Grande Paroisse, FR;
Compagnie Francaise Des Petroles, Paris, FR;
Slumberger Technology Corporation, New York, NY (US);
Abstract
The present invention relates to a method of and apparatus for converting an oil well with natural effluent rise to one with gas-lift of the effluent column, wherein the oil well has a nipple in the production tube provided with a stop-groove and smooth bearing surfaces between which a hydraulic control line comes out. For conversion an inner tube is lowered inside the production tube, the inner tube being provided with a locking system for locking the inner tube to the nipple, and with a safety valve assembly capable of closing both the passage inside the inner tube and the annular passage between the latter and the production tube, under the action of a control fluid supplied by the control line which opens between two seals on the inner tube and which bear against the smooth bearing surfaces when locking is effected. In use, lift-gas is supplied to the annular passage between the inner tube and the production tube, and enters the inner tube, through which the effluent rises, through a gas lift valve provided in the inner tube below the safety valve assembly.