HENRY P ARENDT
Engineering in Dallas, TX

4204690, May 27, 1980

Feb 28, 1979

6/016223

Warren E. Holland - Houston TX
James D. Burley - Humble TX
Henry P. Arendt - Dallas TX

Exxon Production Research Company - Houston TX

F16J 1540, F16J 1524

277 27

A sealing ring assembly is disclosed for use in sealing the annular gap between two concentric cylindrical members, one of the members having an annular groove and the other member having a surface opposed to the groove. Deformable seal material and a radially expansible-contractible non-deformable split retaining ring are located in the groove, the seal material engaging one surface of the retaining ring and the retaining ring being positioned on one of the sidewalls of the groove. The seal material and the retaining ring extend radially to the surface of the other cylindrical member, the retaining ring being sized to elastically compress against that surface. The surface of the retaining ring facing the seal material is beveled or chamfered along a portion or all of its width, the beveled surface extending inwardly to the inner edge of the retaining ring. Fluid pressure applied to the seal material deforms the seal material and causes the seal material to urge the outer edge of the retaining ring against the surface of the other cylindrical member. The seal material is deformed to press against the surface of the other cylindrical member to provide a primary seal.

4334581, Jun 15, 1982

Sep 12, 1980

6/186587

Henry P. Arendt - Dallas TX

Otis Engineering Corporation - Dallas TX

E21B 3410

166324

A single line surface controlled, subsurface safety valve, adapted for connection in a well tubing string. The safety valve has a closure means disposed in the bore of the safety valve housing and is operable by action of control pressure fluid causing a longitudinal operator to move the closure means to an open to flow position. The control pressure fluid chamber in the safety valve is protected from well pressure by providing annular areas, between the longitudinal operator and the housing, positioned between the control pressure fluid chamber and well pressure. The annular areas are sealed from exposure to well pressure and are in fluid communication with each other. A floating piston is positioned to respond to well pressure entering the annular areas and thus move to engage and assist the operator means in closing the safety valve to flow of well fluids therethrough. Vent means is provided to prevent a hydraulic lock from retarding movement of the floating piston.

4938060, Jul 3, 1990

Dec 30, 1988

7/292330

Phillips S. Sizer - Dallas TX
Henry P. Arendt - Dallas TX
Charles C. Cobb - Lewisville TX

Otis Engineering Corp. - Dallas TX

E21B 4700

73151

A system and methods for the inspection of a well borehole and the formation around said borehole. The system includes a coiled tubing unit for injecting flexible coiled tubing into a wellbore through a wellhead, a pump and valves for control of injection of fluids such as water, nitrogen, light-hydrocarbons, natural gas, and carbon dioxide through the coiled tubing into the wellbore, and a sensor for visually inspecting and/or acoustically examining the wellbore and a region around the sensor within a slug of fluid injected into the wellbore from the coiled tubing. The method includes the steps of injecting coiled tubing having an inspection sensor into a wellbore to a selected location, injecting an optically transparent or acoustically homogenous fluid into the wellbore through the coiled tubing to form a slug of such fluid around the sensor, and transmitting signals from the sensor representative of well conditions to the surface. The method may be practiced to inspect only the region around the sensor at a selected depth in the well or may be continuously practiced to examine the length of the wellbore by producing the well and retrieving the coiled tubing and sensor at a controlled rate synchronized with the rate of well production.

3935903, Feb 3, 1976

Apr 2, 1975

5/564276

Henry P. Arendt - Dallas TX

Otis Engineering Corporation - Dallas TX

E21B 3312

166184

A down-the-hole well tubing protective fluid system, with an injection valve in fluid communication with a ported nipple above a packer assembly, for introduction of protective fluid to the tubing bore. The system includes a concentric protective fluid flow path, extended for fluid flow to below the injection nose and through the bore of the packer, and packer tail pipe for introduction of protective fluid into the well-producing flow path below the packer, to provide protection for the packer assembly, inside and outside, below the packer seal, the injection nose, and the injection valve tail pipe. When the injection tail pipe nose is installed to extend below the lower end of the packer tail pipe, the turbulence caused by production fluid entering the tail pipe nose carries diluted chemical fluid mix up, and around, the outside of the packer tail pipe.

4119147, Oct 10, 1978

Oct 20, 1976

5/734110

Henry P. Arendt - Dallas TX
Russell A. Johnston - Dallas TX

Otis Engineering Corporation - Dallas TX

E21B 4312

166155

Disclosed is a pumpdown, retrievable, subsurface, safety valve for use in a well. The valve comprises a valve section including a valve member to control flow through the well tubing and one or more force exerting sections urging the valve member to a position blocking flow. The valve section and force exerting sections are interconnected. This abstract is neither intended to define the invention of the application which, of course, is measured by the claims, nor is it intended to be limiting as to the scope of the invention in any way.

4201363, May 6, 1980

Jul 17, 1978

5/925535

Henry P. Arendt - Dallas TX
Thomas M. Deaton - Dallas TX
Gary A. Kohn - Dallas TX

Otis Engineering Corporation - Dallas TX

F16K 31122, E21B 3300

251 62

Disclosed is a tubing retrievable surface controlled subsurface safety valve having provisions for blocking communication of control fluid to the valve's pressure responsive operator and for locking the valve open in the event of valve failure. This abstract of the disclosure is neither intended to define the scope of the invention which, of course, is measured by the claims nor is it intended to limit the invention in any way.

4355686, Oct 26, 1982

Dec 4, 1980

6/212994

Henry P. Arendt - Dallas TX
Thomas J. Heard - Dallas TX

Otis Engineering Corporation - Dallas TX

E21B 3408

166313

A method and apparatus especially adapted for use with an injection well in which a valve controlled H-member interconnects the two tubings of a two tubing installation and landing nipples are attached to the lower legs of the H-member to receive expendable fluid control means, such as standing valves, in which pressure applied to one tubing to create a pressure differential will move the valve controlling the interconnection between the H-members to open position to permit TFL operations to be carried out in the well and thereafter pressure exerted on a ball supported on the valve member of the control valve for the H-member closes the control valve, and the ball passes through the control valve. The fluid control members in the landing nipples may be ejected either before or after closing of the valve in the H-member.

4997384, Mar 5, 1991

Feb 12, 1990

7/479056

Craig W. Godfrey - Richardson TX
Mark A. Schnatzmeyer - Lewisville TX
Henry P. Arendt - Dallas TX

Otis Engineering Corporation - Dallas TX

E21B 2302

439190

A wet connector for latchingly connecting an electric cable between surface equipment and a previously installed electrically powered well tool at a remote, downhole location in a well for transmitting electrical energy or signals thereto or therefrom. This wet connector comprises a male connector on the downhole well tool and a female connector on the electric cable. The female connector carries a non-conductive liquid which is expelled therefrom during mating with the male connector to wash and cleanse the electrical contacts of both the male and the female connectors. One form of the wet connector is released electrically (reverse polarity being used), and another form of the connector is released by tensioning and slackening the electric cable a predetermined plurality of times. Systems using such wet connectors are disclosed, as are methods for their use. The wet connector can be used in conjunction with an electric cable for installing certain tools in a well, especially where it is desirable to deposit such tools gently with no jarring.

4921438, May 1, 1990

Apr 17, 1989

7/340450

Craig W. Godfrey - Richardson TX
Mark A. Schnatzmeyer - Lewisville TX
Henry P. Arendt - Dallas TX

Otis Engineering Corporation - Dallas TX

E21B 2302

439190

A wet connector for latchingly connecting an electric cable between surface equipment and a previously installed electrically powered well tool at a remote, downhole location in a well for transmitting electrical energy or signals thereto or therefrom. One form of the wet connector is released electricaly (reverse polarity being used), and another form of the connector is released by tensioning and slackening the electric cable a predetermined plurality of times. Systems using such wet connectors are disclosed, as are methods for their use. The wet connector can be used in conjunction with an electric cable for installing certain tools in a well, especially where it is desirable to deposit such tools gently with no jarring.

5058683, Oct 22, 1991

Nov 1, 1990

7/607561

Craig W. Godfrey - Richardson TX
Mark A. Schnatzmeyer - Lewisville TX
Henry P. Arendt - Dallas TX

Otis Engineering Corporation - Dallas TX

E21B 2300

166381

A wet concern for latchingly connecting an electric cable between surface equipment and a previously installed electrically powered well tool at a remote, downhole location in a well for transmitting electrical energy or signals thereto or therefrom. One form of the wet connector is released electrically (reverse polarity being used), and another form of the connector is released by tensioning and slackening the electric cable a predetermined plurality of times. Systems using such wet connectors are disclosed, as are methods for their use. The wet connector can be used in conjunction with an electric cable for installing certain tools in a well, especially where it is desirable to deposit such tools gently with no jarring.