Baker Hughes Corporation

James H Kritzler

Brian A Roth

James H Holt

Edwin K Lewis

Robert Joe Coon

Michael A Carmody

Terry R Bussear

Bruce E Weightman

Keith E Lewis

Walter Chapman

Vic Randazzo

Walt R Chapman

Jeffrey L Osselburn

Roger D Hegdahl

Jeffery L Osselburn

Anthony J Orchard

Joseph C Yeo

Gas lift valve designs and gas lift systems are described that feature a positive closure mechanism that is highly resistant to significant wear or damage that would result in fluid leakage. A pivotable flapper member is incorporated into a gas lift valve and used as a flow control mechanism. The flapper member provides a positive barrier to fluid flow from the production tubing to the annulus, even after substantial wear or damage.

Barrier orifice valve for gas lift

Well completion cement may be pumped through a side pocket mandrel that includes parallel rows of filler sections to exclude cement from void space within the side pocket tube. The filler sections are drilled with cross-flow jet channels and surface upsets to stimulate scrubbing turbulence by well working fluid behind a cement wiper plug. The wiper plug includes leading and trailing groups of wiper discs secured to an elongated shaft. The two wiper groups are separated by a distance that permits the leading seal group to gain traction seal before the push seal on the trailing wiper group is lost. A spring centralizer spans a center section of the shaft between the two wiper groups to maintain axial alignment of the shaft as the plug traverses the length of a mandrel.

Cement through side pocket mandrel

A side-pocket gas lift mandrel having tapered end caps threaded onto the ends of the mandrel with metal-to-metal sealing threads. The thickness of each made up thread set is the same as the thickness of the small end of each end cap, resulting in a mandrel having the same outside diameter as if the end caps were welded on, without sacrificing any inside diameter in the small ends of the end caps, compared to a welded mandrel.

Gas lift mandrel

Computer control and sensory information are combined with gas lift valve having a plurality of individual openings which are openable or closeable individually to provide varying flow rates of the lift gas. Each of the openings is controlled and is sensitive to downhole sensors.

Computer controlled gas lift system

Growing community of inventors

Pearland, TX, United States of America

James H Kritzler