National Oilwell Varco, L.p.

National Oilwell, Inc.

Calvin Ronald Blankenship

James Cirone

Henry Do

Mihail Puscas

Robert Ioan Papp

Christopher Brian Walker

James Cavitt Garrett

Jeff A Lambert

Michael R Zemanek

Jay D Furnish

Kenneth L Cambern

Joel M Ferland

Donald W Johnson

Delfino Moreno, Iii

James C Garrett

James R Cirone

Iii Moreno Delfino

A power swivel is disclosed that is configured to rotate tubular string and drill bit to form or extend a subterranean borehole. In an embodiment, the power swivel includes a motor, a gear box coupled to the motor, and a lubrication system coupled to the gear box. The lubrication system includes a pump disposed within the gear box, the pump including an outlet. In addition, the lubrication system includes a recirculation line fluidly coupled to the outlet of the pump. Further, the lubrication system includes a first injector fluidly coupled to the recirculation line. The injector is configured to deliver lubricant to one of a bearing and a gear disposed within the gear box.

Power swivel and lubrication system

A system for drilling a subterranean borehole. In an embodiment, the system includes a mast, and a pipe rotator coupled to the mast. The pipe rotator includes a stem that is configured to be coupled to an end of a drillstring and a motor that is configured to rotate the stem. In addition, the system includes a guide beam coupled to the mast. The guide beam includes a longitudinal axis and is configured to guide vertical motion of the pipe rotator. The guide beam includes a plurality of elongate sections configured to be generally aligned along the longitudinal axis. In addition, the guide beam includes a plurality of coupling assemblies configured to interconnect the plurality of elongate sections and align the plurality elongate sections along the longitudinal axis.

Guidance systems and apparatus for power swivel

A gooseneck () and a power swivel () including a gooseneck () are disclosed. In an embodiment, the gooseneck includes an inlet section () including an inlet () and a first fluid flow path () extending from the inlet. In addition, the gooseneck includes an outlet section () coupled to the inlet section. The outlet section includes an outlet (). In addition, the outlet section () includes a second fluid flow path () extending axially from the outlet. The second fluid flow path is in fluid communication with the first fluid flow path. Further, the outlet section includes a radially outer surface () that includes a first polygonal section having a plurality of planar surfaces () joined at a plurality of corners ().

Power swivel and gooseneck

A washpipe assembly for a power swivel and a power swivel incorporating the washpipe assembly. In an embodiment, the washpipe assembly includes a washpipe including a central axis and a radially outermost cylindrical surface. In addition, the washpipe assembly includes a first packing assembly configured to be coupled to a stem of the power swivel. The first packing assembly includes a seal assembly that includes one or more annular seal members each including a body and a contact insert mounted to the body, the contact insert engaging and forming a dynamic seal with the radially outermost cylindrical surface of the washpipe.

Washpipe assemblies for a power swivel

A method and apparatus for positioning and supporting the work platform of a mobile workover rig is disclosed. The work platform of the preferred embodiment of the present invention utilizes a unique support structure and automated positioning system for positioning the work platform at the desired height above the wellhead equipment. The preferred embodiment of the present invention utilizes a specialized automated 'pinning' system that secures the work platform at the desired height. Additionally, the present invention utilizes one or more support cylinders to position and support the work platform in the horizontal position over the wellhead equipment. The automated positioning and pinning system of the present invention is a unique system that significantly reduces the time required to position the work platform of a mobile workover rig in the operating position, as well as significantly reduces the risk of injury to rig personnel assisting in the positioning operations.

Automated system for positioning and supporting the work platform of a mobile workover and well-servicing rig

Growing community of inventors

Katy, TX, United States of America

Calvin Ronald Blankenship