1
Alfredo Gomez: Lock mechanism for a sliding sleeve. Baker Hughes Incorporated, Steve Rosenblatt, March 17, 2009: US07503390 (70 worldwide citation)

A locking device prevents stressing of other components used to hold tool portions against relative movement until a desired location is reached. A locking dog holds a first component, such as a sliding sleeve to a second component, such as a mandrel until pressure can move a piston and remove suppo ...


2
Alfredo Gomez, William M Richards, Douglas J Murray: Overpull shifting tool. Baker Hughes Incorporated, Rosenblatt & Redano, August 27, 1996: US05549161 (28 worldwide citation)

A shifting tool is disclosed which allows movement of a shifting sleeve, to be followed by an additional force applied to ensure complete stroking of the shifting sleeve. This is accomplished by a shifting key to normally shift the shifting sleeve, followed by an overpull key which engages while the ...


3
Raymond D Chavers, Graeme J Walker, John M Cobb, Alfredo Gomez: Interventionless reservoir control systems. Baker Hughes Incorporated, Madan Mossman & Sriram P C, June 12, 2007: US07228914 (27 worldwide citation)

Systems and methods for positively closing off a section of wellbore and, thereby providing reservoir control. Systems and methods are described for selectively closing off a section of a wellbore to fluid communication. The wellbore completion section may then be reopened to fluid communication upo ...


4
Alfredo Gomez: High differential shifting tool. Baker Hughes Incorporated, Shawn Hunter, July 7, 2009: US07556102 (27 worldwide citation)

Systems and methods for opening and/or closing sliding sleeve valves while preventing significant stress upon and damage to the fluid seals that are disposed between the outer housing and the sleeve member elements of the valve. A shifting tool carries a latching device and a fluid closure portion w ...


5
Sebastiaan J Wolters, Raymond D Chavers, John Cobb, Alfredo Gomez: Method and apparatus to isolate a wellbore during pump workover. Baker Hughes Incorporated, Madan Mossman & Sriram P C, May 22, 2007: US07219743 (10 worldwide citation)

A system and method for actuating a shut-off valve in a wellbore wherein the shut-off valve element can be positively closed before the pump is removed from the well. A hydraulic actuator component is operably associated with the shut-off valve to provide for selective isolation of the well by posit ...


6
Alfredo Gomez: Metal-to-metal non-elastomeric seal stack. Baker Hughes Incorporated, Shawn Hunter, November 4, 2008: US07445047 (8 worldwide citation)

An improved seal assembly for use in sliding sleeve valves. The seal assembly incorporates a number of annular, chevron-shaped seal elements that are in a stacked configuration and preferably formed of a thermoplastic material to provide a fluid seal between the outer housing and the inner sleeve me ...


7
Samir Nazir, Alfredo Gomez: Multi-cycle isolation valve and mechanical barrier. Baker Hughes Incorporated, Mossman Kumar & Tyler PC, August 30, 2011: US08006772 (1 worldwide citation)

A method for performing a wellbore-related activity may include positioning a sealing device along the wellbore; conveying a work string into the wellbore; using the work string to perform the activity; extracting the work string out of the wellbore; and shifting the sealing device to a closed posit ...


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David E Rothers, John M Cobb, Alfredo Gomez, Samir M Nazir, Elias Pena, James M Youngblood, Brian A Roth: Selective running tool with separation feature. Duane Morris, December 2, 2004: US20040238185-A1

A running tool that delivers an object selectively to one of a plurality of landing nipples and then releases from the object is disclosed. The tool is actuated by raising it after it has passed the desired landing nipple to release a locating dog. The locating dog places locking dogs on the object ...