1
Robert P Badrak, Robert J Coon, Roddie R Smith, Patrick G Mcguire: Method and apparatus for expandable liner hanger with bypass. Weatherford Lamb, Moser Patterson & Sheridan L, November 18, 2003: US06648075 (178 worldwide citation)

The present invention provides a liner hanger and a method of hanging a liner in a wellbore. In one aspect, a process for setting a liner in a wellbore is provided in which a tubular having a slip formed on an outer diameter of the tubular at a first location and a preformed bypass for circulating a ...


2
Rennie L Dickson, Roddie R Smith: Subsurface safety valve with lock-open system. Otis Engineering Corporation, H Mathews Garland, November 25, 1986: US04624315 (61 worldwide citation)

A surface controlled subsurface well safety valve for use in a well tubing string including a flapper valve member, an operator tube for opening the flapper valve member and holding it open, an annular piston on the operator tube operative in response to control fluid pressure conducted from the sur ...


3
Michael B Vinzant, Phillip S Sizer, Ronald K Churchman, Rennie L Dickson, Roddie R Smith: Surface controlled subsurface safety valve. Otis Engineering Corporation, Thomas R Felger, February 9, 1988: US04723606 (29 worldwide citation)

A surface controlled subsurface safety valve for use in a well tubing string including a valve closure member, an operator tube for opening the valve closure member and holding it open, an annular piston on the operator tube operative in response to control fluid pressure conducted from the well sur ...


4
Rennie L Dickson, Roddie R Smith: Surface controlled subsurface safety valve. Otis Engineering Corporation, Thomas R Felger, August 7, 1990: US04945993 (26 worldwide citation)

A surface controlled subsurface safety valve for use in a well tubing string including a valve closure member, an operator tube for opening the valve closure member, a small diameter offset piston to move the operator tube in response to control fluid pressure conducted from the well surface, and a ...


5
Robert P Badrak, Robert J Coon, Roddie R Smith, Patrick G McGuire: Method and apparatus for expandable liner hanger with bypass. Weatherford Lamb, Patterson & Sheridan L, May 23, 2006: US07048065 (22 worldwide citation)

The present invention provides a liner hanger and a method of hanging a liner in a wellbore. In one aspect, a process for setting a liner in a wellbore is provided in which a tubular having a slip formed on an outer diameter of the tubular at a first location and a preformed bypass for circulating a ...


6
Donald Powell Lauderdale, Roddie R Smith, Richard Gledhill: Balance line safety valve with tubing pressure assist. Weatherford Lamb, Patterson & Sheridan L, July 1, 2008: US07392849 (16 worldwide citation)

The present invention generally relates to a subsurface safety valve configured to control fluid flow through a production tubing string. In one aspect, a safety valve for deployment beneath a surface of a wellbore is provided. The valve includes a control piston and a balance piston. The valve is c ...


7
Roddie R Smith, Craig D Hines, Rennie L Dickson: Streamlined flapper valve. Halliburton Company, Tracy W Druce, Dennis T Griggs, June 28, 1994: US05323859 (16 worldwide citation)

A subsurface safety valve has a valve seat and an upwardly closing flapper plate whose sealing surfaces each have a matched spherical radius of curvature. The sealing surface of the valve seat is a concave spherical segment and the sealing surface of the flapper plate is a convex spherical segment. ...


8
Roddie R Smith: Pressure actuated tubing safety valve. Weatherford Lamb, Patterson & Sheridan, July 24, 2007: US07246668 (13 worldwide citation)

The present invention generally provides a downhole valve for selectively sealing a bore. The downhole valve generally includes a closing member for seating in and closing the bore, and a pressure-actuated, retention member having first and second opposed piston surfaces for initially holding the va ...


9
Roddie R Smith: Metal to metal seal for well safety valve. Halliburton Company, Tracy W Druce, Monty L Ross, February 8, 1994: US05284205 (13 worldwide citation)

A metal to metal seal (10) is provided that comprises an annular seat (66), a seal member (90) having annular metal skirt (91) adapted to engage the annular seat (66), an undercut section behind the skirt (91), and an annular retainer member (78) disposed in the undercut section behind the skirt (91 ...


10
Roddie R Smith, Craig D Hines, Rennie L Dickson: Streamlined flapper valve. Otis Engineering Corporation, Dennis T Griggs, August 11, 1992: US05137089 (12 worldwide citation)

A subsurface safety valve has a valve seat and an upwardly closing flapper plate whose sealing surfaces each have a matched spherical radius of curvature. The sealing surface of the valve seat is a concave spherical segment and the sealing surface of the flapper plate is a convex spherical segment. ...