Henry S Do

US Patent:

20200248513, Aug 6, 2020

Filed:

Oct 21, 2016

Appl. No.:

15/769921

Inventors:

- Houston TX, US
Henry Do - Katy TX, US
Robert Ioan Papp - Houston TX, US
Mihail Puscas - Rosenberg TX, US
Calvin Ronald Blankenship - Katy TX, US

Assignee:

National Oilwell Varco, L.P. - Houston TX

International Classification:

E21B 21/01
E21B 21/08

Abstract:

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 (c) that includes a first polygonal section having a plurality of planar surfaces () joined at a plurality of corners ().

US Patent:

20180313154, Nov 1, 2018

Filed:

Oct 19, 2016

Appl. No.:

15/770441

Inventors:

- Houston TX, US
Henry Do - Katy TX, US
Robert Ioan Papp - Houston TX, US
Mihail Puscas - Rosenberg TX, US
Calvin Ronald Blankenship - Katy TX, US

Assignee:

National Oilwell Varco, L.P. - Houston TX

International Classification:

E21B 3/04
F16H 57/04
F16H 57/12

Abstract:

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.

US Patent:

20170321807, Nov 9, 2017

Filed:

May 4, 2017

Appl. No.:

15/586509

Inventors:

- Houston TX, US
Henry Do - Katy TX, US
Robert Ioan Papp - Houston TX, US
Mihail Puscas - Rosenberg TX, US
Calvin Ronald Blankenship - Katy TX, US

Assignee:

National Oilwell Varco, L.P. - Houston TX

International Classification:

F16J 15/3284
E21B 21/00
E21B 3/02

Abstract:

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.