Daniel W Craig

US Patent:

20090188671, Jul 30, 2009

Filed:

Jan 25, 2008

Appl. No.:

12/020095

Inventors:

Jobby T. Jacob - Houston TX, US
Bryan P. Pendleton - Cypress TX, US
Daniel T. Craig - Fulshear TX, US

Assignee:

BAKER HUGHES INCORPORATED - HOUSTON TX

International Classification:

E21B 17/18

US Classification:

166313, 1662423

Abstract:

A junction includes a borehole casing having a window therein; a diverter disposed within the casing and aligned and oriented with the window, the diverter having at least one profile along a longitudinal edge thereof; and a hanger assembly having a window therein, the window having an edge receivable by the at least one profile, the profile supporting the hanger assembly and method.

US Patent:

46372113, Jan 20, 1987

Filed:

Aug 1, 1985

Appl. No.:

6/761600

Inventors:

Dowell White - Pasadena TX
Daniel L. Craig - Houston TX
Jack L. Duke - Houston TX
Donald H. Laurie - Porter TX

International Classification:

F01K 2502

US Classification:

60650

Abstract:

An apparatus and method for converting thermal energy to mechanical energy utilizing a heat engine having a liquid working fluid which remains in liquid state in a closed fluid system throughout the entire cycle. The closed fluid system for the liquid working fluid includes a pair of double acting displacer cylinders (18, 20) in opposed cycling relation to each other and alternating between low pressure working fluid and high pressure working fluid. High temperature high pressure working fluid from a heat exchanger (12) including a plurality of thin heat transfer plates is provided alternately to the cylinders (18, 20) by the actuation of control valves (24, 28). The heat exchanger (12), a heater (14), and a cooler (16) are arranged between the control valves (24, 28) and the flow of low pressure working fluid and high pressure working fluid in adjacent paths through the heat exchanger (12) between the control valves (24, 28) is always in the same direction for each path.

US Patent:

20210246751, Aug 12, 2021

Filed:

Feb 5, 2021

Appl. No.:

17/169372

Inventors:

- Houston TX, US
Daniel T. Craig - Katy TX, US

International Classification:

E21B 31/00
E21B 31/12
E21B 33/10
E21B 17/04
E21B 36/00

Abstract:

A downhole tool for joining a string of pipe to a tubular already downhole with a seal element made of metal or metal alloy with a melting point lower than the melting point of the tool and tubular but higher than the temperature of expected downhole operating conditions.