Thomas Everett Perkins

US Patent:

52735915, Dec 28, 1993

Filed:

Apr 14, 1992

Appl. No.:

7/868156

Inventors:

Thomas K. Perkins - Dallas TX

Assignee:

Atlantic Richfield Company - Los Angeles CA

International Classification:

B08B 908

US Classification:

134 2219

Abstract:

Deposits are removed from cargo tanks of marine crude oil tankers and the like by introducing into the tanks a solvent for the deposits which are formed on the interior surfaces of the tanks, including those surfaces which cannot be reached by crude oil washing machines and the like. The solvent is caused to contact all of the interior surfaces of the tanks by pumping ballast water sequentially into and out of the tanks to cause the solvent to rise and fall in each of the tanks. The method may be carried out during return trips of tankers from the point of discharge of cargo to the point of loading new cargo.

US Patent:

45894914, May 20, 1986

Filed:

Jun 27, 1985

Appl. No.:

6/749137

Inventors:

Thomas P. Perkins - Dallas TX

Assignee:

Atlantic Richfield Company - Los Angeles CA

International Classification:

E21B 4326

US Classification:

166302

Abstract:

A method for forming a communication link between two boreholes including first cooling of a zone between the boreholes by pumping a cooling fluid down one borehole and producing it from the other and, after sufficient formation cooling has occurred, raising of the injection pressure at one borehole to initiate a fracture which tends to follow the cooled zone to the second borehole.

US Patent:

44455755, May 1, 1984

Filed:

Dec 14, 1981

Appl. No.:

6/330061

Inventors:

Thomas K. Perkins - Dallas TX

Assignee:

Atlantic Richfield Company - Los Angeles CA

International Classification:

E21B 3313

US Classification:

166290

Abstract:

A borehole cementing process in which a quantity of water-like fluid is pumped into a borehole above drilling mud and the cement slurry is pumped into the borehole above at least a portion of the water-like fluid. Turbulent mixing of cement slurry and water at the interface creates an isolation zone preventing degradation of the bulk of the cement slug.

US Patent:

52656519, Nov 30, 1993

Filed:

May 26, 1992

Appl. No.:

7/887941

Inventors:

Thomas K. Perkins - Dallas TX
Sophany Thach - Dallas TX

Assignee:

Atlantic Richfield Company - Los Angeles CA

International Classification:

B65D 8846

US Classification:

141 1

Abstract:

Floating roof storage tanks are modified to include a foam surge tank, a low-pressure blower and a foam generator for generating vapor-suppressing foam during withdrawal of liquid from the storage tank and after the floating roof reaches its lowest elevation in the storage tank so that the tank space previously occupied by volatile liquid is provided with a vapor-suppressing foam blanket during liquid withdrawal and refill. The surge tank is mounted directly on the floating roof and discharges its foam through an opening in the roof into the tank storage space. During liquid refill the foam may be forced out through a vent conduit onto the roof of the tank and dissolved and recovered.

US Patent:

44136790, Nov 8, 1983

Filed:

May 7, 1982

Appl. No.:

6/375842

Inventors:

Thomas K. Perkins - Dallas TX

Assignee:

Atlantic Richfield Company - Los Angeles CA

International Classification:

E21B 4102
E21B 3604

US Classification:

166248

Abstract:

A method for the cathodic protection of metal conduit in a wellbore in permafrost wherein a predetermined electric current is impressed between said conduit and an anode, the improvement comprising setting said anode in the permafrost away from the wellbore a distance which is greater than the distance between the bottom of the anode and the bottom of the permafrost, and increasing the voltage sufficiently to match the increased resistivity of the permafrost to thereby maintain the predetermined current between the wellbore and anode.

US Patent:

48301108, May 16, 1989

Filed:

Mar 22, 1988

Appl. No.:

7/171709

Inventors:

Thomas K. Perkins - Dallas TX

Assignee:

Atlantic Richfield Company - Los Angeles CA

International Classification:

E21B 4302

US Classification:

166278

Abstract:

Unconsolidated formations may be produced to yield hydrocarbons and other fluids by forming an openhole wellbore in the region to be produced, cleaning the wellbore face with a low solids content, low leakoff type fluid and/or underreaming the wellbore to provide a clean face in the region of interest and followed by insertion of a production tubing string including a filter medium which will retain larger formation sand particles in the wellbore cavity but will allow a limited amount of solids fines to be produced with the produced fluids. An in situ sand pack is formed within the wellbore cavity together with a dilatant zone of generally cylindrical shape having an outer radius which grows into the formation until the in situ stresses increase and the dilatant zone as well as the in situ sand pack become stable. This type of well completion eliminates the requirement for other means of consolidating formation sands as well as the cost of installing artificial gravel packs in a well.

US Patent:

52267490, Jul 13, 1993

Filed:

Jul 8, 1992

Appl. No.:

7/910381

Inventors:

Thomas K. Perkins - Dallas TX

Assignee:

Atlantic Richfield Company - Los Angeles CA

International Classification:

B09B 300
B65G 500

US Classification:

405128

Abstract:

Slurried solid waste materials are injected into subterranean earth formations in a zone of interest which has a relatively low in situ compressive stress bounded by zones of higher in situ compressive stress and wherein the zone of interest has alternate layers of material of relatively high and low permeability to fluid flow, respectively. The solid waste slurry is conducted through an injection well penetrating the zone of interest to form a conventional two-winged hydraulic fracture. The fracture is extended by reducing the tendency to form filtercake in the fracture adjacent to the layers of material of relatively low permeability while depositing particle filtercake adjacent the earth layers of high permeability so as to provide clear fluid flowpaths through the fracture while allowing the filtercake layers disposed in the fracture to assist in propping the fracture open until adequate lateral extension of the fracture and disposal of the waste material is accomplished.

US Patent:

41205065, Oct 17, 1978

Filed:

Dec 21, 1977

Appl. No.:

5/863005

Inventors:

Thomas K. Perkins - Dallas TX

Assignee:

Atlantic Richfield Company - Los Angeles CA

International Classification:

F16J 1520

US Classification:

277105

Abstract:

In a wellhead for wells such as an oil and/or gas well wherein an elastic annular seal means is employed in the wellhead for sealing the interior thereof from the exterior thereof, the improvement comprising at least one annular resilient back-up means for said seal means, the back-up means comprising a stack of at least two annular resilient members, each member having a plurality of spaced apart protrusions thereon and each member being oriented in relation to its next adjacent member so that the protrusions of each member in the stack abut the adjacent member in between the protrusions of that adjacent member.