Michael Steven Krauel

US Patent:

8312944, Nov 20, 2012

Filed:

Jan 28, 2009

Appl. No.:

12/360924

Inventors:

Alan J. Marshall - Lost Creek WV, US
Shantanu Swadi - Cypress TX, US
Michael Krauel - Houston TX, US

Assignee:

Smith International, Inc. - Houston TX

International Classification:

E21B 10/36

US Classification:

175414

Abstract:

A percussion drilling assembly for boring into the earth. In an embodiment, the assembly comprises a tubular case having a central axis, an upper end, and a lower end. In addition, the assembly comprises a piston slidingly disposed within the tubular case. Further, the assembly comprises a driver sub coaxially coupled to the lower end of the tubular case. The driver sub includes an upper end disposed within the case and a lower end extending axially from the lower end of the case. Still further, the assembly comprises a hammer bit coaxially disposed within the driver sub. The hammer bit including an upper end disposed within the driver sub and a lower end extending from the lower end of the driver sub. The upper end of the driver sub extends axially from the upper end of the hammer bit and is adapted to receive the piston.

US Patent:

8607881, Dec 17, 2013

Filed:

Dec 8, 2010

Appl. No.:

12/963432

Inventors:

Troy M. Hudson - Magnolia TX, US
Michael S. Krauel - Houston TX, US

Assignee:

National Oilwell Varco, L.P. - Houston TX

International Classification:

E21B 31/12

US Classification:

166380, 1662426

Abstract:

A rope socket comprises a slip cone subassembly having a straight outer diameter and a tapered inner diameter. A plurality of slips is positioned within the slip cone body. A retainer ring holds the slips together. A guide plug is positioned within the slips to maintain the slips in an opening position during insertion of a cable. A spring stabilizer having a spring thereon is coupled above the slip cone assembly to ensure even compression of the spring. A safety slot is located on the body of the rope socket in order to provide a visual indication of the cable position.

US Patent:

20140060817, Mar 6, 2014

Filed:

Nov 12, 2013

Appl. No.:

14/078132

Inventors:

Troy M. HUDSON - Magnolia TX, US
Michael S. KRAUEL - Houston TX, US

Assignee:

NATIONAL OILWELL VARCO, L.P - Houston TX

International Classification:

E21B 17/02

US Classification:

1662426

Abstract:

A rope socket comprises a slip cone subassembly having a straight outer diameter and a tapered inner diameter. A plurality of slips is positioned within the slip cone body. A retainer ring holds the slips together. A guide plug is positioned within the slips to maintain the slips in an opening position during insertion of a cable. A spring stabilizer having a spring thereon is coupled above the slip cone assembly to ensure even compression of the spring. A safety slot is located on the body of the rope socket in order to provide a visual indication of the cable position.