Jimmie M Renfro

6877571, Apr 12, 2005

Sep 4, 2001

09/946849

William James Hughes - Tulsa OK, US
Jimmie Josh Renfro - Plano TX, US

Sunstone Corporation - Oklahoma City OK

E21B007/00
E21B010/60

175 57, 175393, 175324, 175340

A Down Hole Drilling Assembly (DHDA) that induces artificial lift to remove the drilling fluid from a well bore using a jet pump attached to a casing string. The DHDA includes a drill string that passes through the jet pump assembly. The power fluid is separated from the drilling fluid until after it has passed through the nozzle of the jet pump. The jet pump assembly is joined to a concentric casing string. The jet pump also contains a bladder element that expands to redirect the flow of the drilling fluid from the inner annulus into the jet pump assembly. The jet pump assembly lifts the drilling fluid, lowering the fluid level within a well bore to a point where the hydrostatic pressure near the bottom of the well is lower than the pore pressure of the formation being drilled thereby creating under balanced conditions.

6899188, May 31, 2005

Mar 26, 2003

10/397328

William James Hughes - Tulsa OK, US
Jimmie Josh Renfro - Plano TX, US

Sunstone Corporation - Oklahoma City OK

E21B007/00

175 57, 175231

A concentric casing actuated jet pump is disclosed that induces artificial lift to remove the drilling and production fluid from a well bore during drilling operations by means of a single or multiple hydraulic jet pumps attached to a concentric string of casing. The invention includes a drill string that passes through the jet pump assembly so that the power fluid is separated from the drilling fluid until it enters the jet pump. The jet pump assembly is joined to a concentric casing string. The jet pump also contains a bladder element that inflates or expands to redirect the flow of the drilling and production fluid from the inner annulus into the jet pump assembly. Vertical displacement of the inner casing string by a casing jack causes the bladder to redirect the flow of drilling fluid form the inner annulus into the jet pump assembly.

46624376, May 5, 1987

Nov 14, 1985

6/797739

Jimmie J. Renfro - Plano TX

Atlantic Richfield Company - Los Angeles CA

E21B 4300

166 651

Electrical resistance heating of subterranean viscous fluid deposits is provided by a wellbore having a conductive casing section and a coupling disposed in proximity to the formation. An elongated, flexible fluid injection or withdrawal tube extends into the wellbore, is secured to the coupling, and is connected to a source of electrical energy. The tube is preferably of composite construction having an inner steel core, an outer copper layer and a reinforced plastic corrosion resistant coating over the copper layer.

46713590, Jun 9, 1987

Mar 11, 1986

6/838645

Jimmie J. Renfro - Plano TX

Atlantic Richfield Company - Los Angeles CA

E21B 3700

166312

A well cleanout system for removing accumulations of solid particles in a gravel pack screen or liner and in the vicinity of a casing or liner hanger includes a tubular extension member which may be lowered into the production fluid tubing string and secured to a nipple at the lower end of the tubing string. Coiled tubing with a nozzle arrangement on the distal end thereof is extended through the tubular extension member and into the wellbore for jetting a cleanout fluid into the wellbore to entrain solids in a fluid stream which is pumped to the surface through the production tubing. The coiled tubing, nozzle and extesnion member may be retrieved by unlocking the extension member and pulling the coiled tubing out of the wellbore.