Albert L Davis

US Patent:

8261829, Sep 11, 2012

Filed:

Dec 22, 2009

Appl. No.:

12/645070

Inventors:

Albert P. Davis - Houston TX, US

Assignee:

Hydrus Corporation, Inc. - Houston TX

International Classification:

E21B 31/12

US Classification:

166301

Abstract:

A well fishing method and system is described. In at least one example of the invention, a method of retrieval of material (e. g. , a tubing string) having broken control or monitoring lines from a cased well is provided. The method comprises: isolating, from the well casing, broken lines above the material to be retrieved, thereby creating a substantially axial work passage; grasping the material to be removed through the substantially axial work passage; and pulling the material to be retrieved and the restrained lines from the well. Example shrouds, probes and other members are also described.

US Patent:

8496058, Jul 30, 2013

Filed:

Aug 7, 2012

Appl. No.:

13/568910

Inventors:

Albert P. Davis - Houston TX, US

Assignee:

Hydrus Corporation, Inc. - Houston TX

International Classification:

E21B 31/12

US Classification:

166301

Abstract:

A well fishing method and system is described. In at least one example of the invention, a method of retrieval of material (e. g. , a tubing string) having broken control or monitoring lines from a cased well is provided. The method comprises: isolating, from the well casing, broken lines above the material to be retrieved, thereby creating a substantially axial work passage; grasping the material to be removed through the substantially axial work passage; and pulling the material to be retrieved and the restrained lines from the well. Example shrouds, probes and other members are also described.

US Patent:

45067295, Mar 26, 1985

Filed:

Feb 22, 1983

Appl. No.:

6/468534

Inventors:

Albert P. Davis - Houston TX
Orien M. Knight - Joshua TX
John W. Stoltz - Fort Worth TX

Assignee:

Exxon Production Research Co. - Houston TX
Gearhart Industries, Inc. - Fort Worth TX

International Classification:

E21B 1700
E21B 3400

US Classification:

166 65M

Abstract:

A side-entry sub for use in conjunction with wireline cable. The sub has a cable entry port provided with a self-closing valve for sealing the port upon withdrawal of the cable. In one embodiment, the self-closing valve is characterized by a housing member supporting a closure disc which is integrally molded with a resiliently deflectable support member having an elastic memory which biases the valve in the closed position. In an alternate embodiment, the self-closing valve comprises a ball valve, biased in the closed position by magnetic or spring means, and having a passageway through which the cable may pass. When the cable is inserted through the passageway, the ball valve is held in the valve open position. When the cable is removed from the passageway, the ball valve automatically closes.

US Patent:

40362604, Jul 19, 1977

Filed:

Jun 26, 1975

Appl. No.:

5/590686

Inventors:

Albert Sidney Davis - Houston TX
Robert William Davis - Houston TX
Joseph Paul Weber - Alvin TX

International Classification:

F16K 318

US Classification:

138 943

Abstract:

A valve comprising: a housing having an opening therethrough around which is provided a seat; a closure assembly for blocking flow through the opening and for sealing engagement with the seat; and an actuator assembly connected to the closure assembly for moving the closure assembly between a first position, out of the flow path of the opening, to a second position, in the flow path, and for expanding the closure assembly for sealing engagement with the seat.

US Patent:

45374570, Aug 27, 1985

Filed:

Feb 4, 1985

Appl. No.:

6/697689

Inventors:

Albert P. Davis - Houston TX
Leon H. Robinson - Houston TX

Assignee:

Exxon Production Research Co. - Houston TX

International Classification:

H01R 300

US Classification:

339117P

Abstract:

A connector 10 is disclosed which is suited for use in effecting an electrical connection between separate conductor bundles 12, 16 in adjacent sections of a threadably sectioned conduit. The connector 10 is especially well suited for use in providing electrical continuity across a tool joint in a drill string. The connector 10 has first and second portions 20, 22 each adapted for placement in a corresponding connection portion of two connectable lengths of conduit. The first and second portions 20, 22 form a pin and box connection. Corresponding contacts 46, 80 on the first and second portions 20, 22 assume a conductive relationship in response to connection of the conduit. The contacts 46, 80 of each connector portion 20, 22 are radially symmetric about the axis of the conduit and are axially displaced one from the other. The contacts 46, 80 within the assembled connector 10 are isolated from the conduit environment. Apparatus is provided for maintaining a dielectric fluid in the region surrounding the contacts 46, 80 to ensure electrical insulation of the connector 10.

US Patent:

47858940, Nov 22, 1988

Filed:

Mar 10, 1988

Appl. No.:

7/166592

Inventors:

Albert P. Davis - Houston TX
Joseph W. Stolle - Wharton TX

Assignee:

Exxon Production Research Company - Houston TX

International Classification:

E21B 1202

US Classification:

175 39

Abstract:

An earth drilling bit incorporating a bit wear indicator. The bit wear indicator includes: a sensor to detect wear at a selected point on the bit; a device for altering the resistance of the bit to receiving drilling fluid from the drill string; and, a tensioned linkage extending between the wear sensor and the flow resistance altering means. On detecting a predetermined degree of wear, the wear sensor releases the tension in the tensioned linkage. This activates the flow resistance altering device, causing the flow rate and/or pumping pressure of the drilling fluid to change. This serves as a signal that the predetermined wear condition has been achieved. The bit wear indicator can be adapted to monitor many different types of bit wear, including bearing wear in roller-cone type bits and gauge wear in all types of bits.

US Patent:

53299590, Jul 19, 1994

Filed:

Oct 29, 1992

Appl. No.:

7/968364

Inventors:

Charles D. Owen - Houston TX
Michael E. Rembert - Cypress TX
Albert S. Davis - Richmond TX

Assignee:

Bettis Corporation - Waller TX

International Classification:

F16K 508
F16K 3500
F16K 5100

US Classification:

137315

Abstract:

A device for controlling the rotation of a valve and/or valve actuator, such device including a housing secured to said valve and actuator, hub member rotatably received by said housing, at least one stop member receiving device provided said housing, and at least one stop member engageable surface provided said hub.

US Patent:

46553002, Apr 7, 1987

Filed:

Sep 26, 1985

Appl. No.:

6/781198

Inventors:

Albert P. Davis - Houston TX
Mark S. Ramsey - Spring TX
Joseph W. Stolle - Wharton TX

Assignee:

Exxon Production Research Co. - Houston TX

International Classification:

E21B 1202

US Classification:

175 39

Abstract:

The present invention relates to a method and apparatus for detecting excessive wear of a rotatable bit used in drilling. In particular, the apparatus can detect loss of gauge or bearing failure in a bit. The method is accomplished by connecting a restricting means in the drill bit that can be manipulated to reduce the flow of drilling fluid through at least one port in the drill bit. A wire is connected between a sensor which senses wear and the restriction means to cause the restriction means to reduce the flow of drilling fluid and thereby signal the surface by the reduced flow as an indication of wear.