1
Douglas J Murray, Frederick T Tilton: Method and apparatus for sealing the juncture between a vertical well and one or more horizontal wells using deformable sealing means. Baker Hughes, Fishman Dionne & Cantor, June 7, 1994: US05318122 (261 worldwide citation)

In accordance with the present invention, a plurality of methods and devices are provided for solving important and serious problems posed by lateral (and especially multilateral) completion in a wellbore including methods and devices for sealing the junction between a vertical and lateral well. Met ...


2
Douglas J Murray: Frac system without intervention. Baker Hughes Incorporated, Steve Rosenblatt, February 5, 2008: US07325617 (139 worldwide citation)

A system allows for sequential treatment of sections of a zone. Access to each portion can be with a sliding sleeve that has a specific internal profile. Pump down plugs can be used that have a specific profile that will make a plug latch to a specific sleeve. Pressure on the plug when latched allow ...


3
Paul A Reinhardt, Douglas J Murray: Casing valve. Baker Hughes Incorporated, Rosenblatt & Associates, June 20, 1995: US05425424 (131 worldwide citation)

An apparatus and method for producing through a casing without perforation are disclosed. The casing can be rotated while it is cemented and includes a multiplicity of sliding sleeve valves. Each of the valves selectively covers a plurality of pistons, each of which preferably has a rupture disc mou ...


4
John L Baugh, David E Hirth, Douglas J Murray: Method for multi-lateral completion and cementing the juncture with lateral wellbores. Baker Hughes Incorporated, Cantor Colburn, August 31, 1999: US05944108 (100 worldwide citation)

The present invention relates to an improved method for multilateral completion and cementing (i.e., sealing) the juncture between primary and lateral wellbores. The completion method of the present invention addresses the issue of cementation and sealing of junctures between vertical and lateral we ...


5
Mark W Brockman, L Cameron White, Douglas J Murray, Robert J McNair, Jeffrey D Cockrell: Method and apparatus for locating and re-entering one or more horizontal wells using whipstock with sealable bores. Baker Hughes Incorporated, Fishman Dionne & Cantor, June 7, 1994: US05318121 (91 worldwide citation)

In accordance with the present invention, a plurality of methods and devices are provided for solving important and serious problems posed by lateral (and especially multilateral) completion including methods and devices for re-entering selected lateral wells to perform completions work, additional ...


6
Douglas J Murray: Downhole method using multiple plugs. Baker Hughes Incorporated, Steve Rosenblatt, June 30, 2009: US07552779 (90 worldwide citation)

A system allows for sequential treatment of sections of a zone. Access to each portion can be with a sliding sleeve that has a specific internal profile. Pump down plugs can be used that have a specific profile that will make a plug latch to a specific sleeve. Pressure on the plug when latched allow ...


7
Alan MacKenzie, Sebastian J Wolters, Douglas J Murray: Method and apparatus for completing a wellbore. Baker Hughes Incorporated, Cantor Colburn, May 13, 2003: US06561279 (90 worldwide citation)

A method and apparatus to provide a large bore hook hanger system incorporating sand exclusion at a junction in a multilateral wellbore includes the running of a lateral liner having an expandable sleeve positioned thereon to bridge a milled window from the lateral borehole to the primary borehole, ...


8
Alan MacKenzie, Sebastian J Wolters, Douglas J Murray: Method and apparatus for completing a wellbore. Baker Hughes Incorporated, Cantor Colburn, July 16, 2002: US06419026 (89 worldwide citation)

A method and apparatus to provide a large bore hook hanger system incorporating sand exclusion at a junction in a multilateral wellbore includes the running of a lateral liner having an expandable sleeve positioned thereon to bridge a milled window from the lateral borehole to the primary borehole, ...


9
Douglas J Murray, Steve Rosenblatt: Self energized packer. Baker Hughes Incorporated, Steve Rosenblatt, June 17, 2008: US07387158 (76 worldwide citation)

A packer or plug features a main sealing element that swells after a delay long enough to get it into proper position. A sleeve eventually goes away to let the well fluids at the main sealing element to start the swelling process until contact with the surrounding tubular or the wellbore is establis ...


10
Douglas J Murray: Expandable tubing joint and through-tubing multilateral completion method. Baker Hughes Incorporated, Cantor Colburn, November 4, 2003: US06640895 (67 worldwide citation)

A through-tubing multilateral system for downhole oil drilling operations includes a tubing extension positioned in a downhole end of a tubing string in a wellbore and an anchoring system configured and positioned to anchor the tubing extension in the wellbore. The tubing extension is dimensioned to ...