Otis Engineering Corporation

Fleming A Waters

George M Raulins

A tubing retrievable completion assembly includes a surface-controllable, safety control valve interposed between the production tubing string and a production seal unit. A gas-lift safety valve is carried within a side pocket mandrel connected in the upper production string. The upper production string, production flow safety valve and gas-lift safety valve are run in and removed as a single unit from a single-bore hanger packer which is releasably anchored within the well casing. Separate concentric flow passages are provided through the packer bore for the upward flow of formation fluid through a production stinger conduit which extends through the packer bore, and for downward flow of lift gas through the annulus between the packer bore and the stinger conduit. The completion assembly is locked into place below the hanger packer by a latch having fixed and movable collets. Pressure equalization across the packer is obtained by closure of the gas lift safety valve and opening of an equalization valve whereby lift gas from the lower casing annulus is vented into the production tubing string.

Completion apparatus and method for gas lift production

A test system for wells which may be utilized in any well having a landing nipple therein. A pressure recording instrument is run in on a locking mandrel and a closing tool is provided which cooperates with a valve and moves it from open to closed position. With the closing prong engaged with the valve member and the valve in open position a small diameter extension on the prong is positioned opposite the ports in the valve to provide a large flow area.

Test-system

A remote-controlled tubing safety valve having a check valve and a remotely controlled valve member operator movable between two positions. When the valve member operator is in a first position the check valve is maintained open. When the valve member operator is in a second position it does not interfere with the operation of the check valve. This abstract is neither intended to define the invention of the application which, of course, is measured by the claims, nor is it intended to be limiting as to the scope of the invention in any way.

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Dallas, TX, United States of America

Fleming A Waters