Joseph L Nelson

US Patent:

53968859, Mar 14, 1995

Filed:

Jul 31, 1992

Appl. No.:

7/923311

Inventors:

Joseph M. Nelson - Bristol PA

International Classification:

A61M 1600
A62B 902
A62B 1802
F16L 300

US Classification:

12820418

Abstract:

A mobile air supply cart for use by personnel wearing respirators while working in hazardous environments. The cart supports two compressed air cylinders and has a handle and wheels, thereby facilitating transporting the air supply as the movements of the user require. A connector pin allows the cart to be separated into a base assembly and a frame assembly to which the cylinders are secured. In this configuration the cylinders can be carried through confined spaces. A piping system is mounted on the cart and regulates the pressure of the air supplied to the user. Valving allows the cylinder from which air is supplied to be switched out and the other cylinder to be switched in as the air is depleted in one cylinder without interrupting the supply of air to the user. A low pressure manifold on the cart allows several users to be supplied with air simultaneously. A coupling in the piping system allows the cylinders to recharged from a remote air supply while simultaneously supplying air to the user.

US Patent:

52617653, Nov 16, 1993

Filed:

Mar 12, 1991

Appl. No.:

7/667952

Inventors:

Joseph M. Nelson - Wilmington DE

Assignee:

Hrubetz Environments Services, Inc. - Dallas TX

International Classification:

E02D 311

US Classification:

405128

Abstract:

A technique for in situ decontamination of an earth formation. High gas temperatures can be achieved at subsurface formations by supplying a fuel at a subsurface location, such as at the bottom of a wellbore. Pressurized air or gas preheated to a temperature of about 700. degree. F. -1200. degree. F. is supplied to the wellbore to ignite the fuel. The combustion heat produced by the fuel further heats the preheated gas to temperatures in the range of 1200. degree. F. -4500. degree. , which heated gases are forced out of the borehole into the contaminated formation. Contaminants are thereby volatilized or oxidized and removed from the formation to the surface.

US Patent:

41413873, Feb 27, 1979

Filed:

Nov 18, 1977

Appl. No.:

5/852871

Inventors:

George E. Campbell - Glen Riddle PA
Joseph W. Nelson - Lansdowne PA
Gordon A. Russell - Strafford PA

Assignee:

Suntech, Inc. - Wayne PA

International Classification:

F16L 5904

US Classification:

138158

Abstract:

An insulator having a universal configuration can be placed around many different types of steam traps. The insulator comprises a housing having suitable openings for water drainage and testing of the trap by an ultrasonic probe, and thermal insulation. Use of the insulator results in more efficient operation of the trap and saves energy. One of the outstanding features of the insulator is its ease of installation.

US Patent:

52517004, Oct 12, 1993

Filed:

Jan 31, 1991

Appl. No.:

7/648659

Inventors:

Joseph M. Nelson - Wilmington DE
Garland R. Rau - Lewisville TX

Assignee:

Hrubetz Environmental Services, Inc. - Dallas TX

International Classification:

E02D 311
E21B 3600
E21B 4324
E21B 4330

US Classification:

1663051

Abstract:

Disclosed is in situ decontamination methods and apparatus for injecting a hot gas into boreholes formed in a contaminated soil area to vaporize the soil moisture and contaminants, and for collecting the vaporized contaminants at the surface of the soil. A burner heats pressurized gases and mixes the same with combustion gases for injection into the contaminated zone. A central collection system recovers the vaporized contaminants and couples such vapors to an on-site incinerator for disposal. Controlled heating of the injection gas is effective to sequentially remove different types of contaminants, as well as to provide in situ oxidation of other contaminants, while minimizing recondensation of the soil vapors. Wellbore casings are especially adapted for injecting the gas in predetermined patterns. In addition, a heater and incinerator assembly utilizes a single burner for both heating the dry gas and for incinerating the vapor contaminants.

US Patent:

50113291, Apr 30, 1991

Filed:

Feb 5, 1990

Appl. No.:

7/458084

Inventors:

Joseph M. Nelson - Wilmington DE
Garland R. Rau - Lewisville TX

Assignee:

Hrubetz Exploration Company - Dallas TX

International Classification:

E02D 311

US Classification:

405128

Abstract:

Disclosed is in situ decontamination methods and apparatus for injecting a hot gas into boreholes formed in a contaminated soil area to vaporize the soil moisture and contaminants, and for collecting the vaporized contaminants at the surface of the soil. A burner heats pressurized gases and mixes the same with combustion gases for injection into the contaminated zone. A central collection system recovers the vaporized contaminants and couples such vapors to an on-site incinerator for disposal. Controlled heating of the injection gas is effective to sequentially remove different types of contaminants, as well as to provide in situ oxidation of other contaminants, while minimizing recondensation of the soil vapors. Wellbore casings are especially adapted for injecting the gas in predetermined patterns. In addition, a heater and incinerator assembly utilizes a single burner for both heating the dry gas and for incinerating the vapor contaminants.

US Patent:

54824028, Jan 9, 1996

Filed:

Nov 15, 1993

Appl. No.:

8/152856

Inventors:

Joseph M. Nelson - Wilmington DE

Assignee:

Hrubetz Environmental Services, Inc. - Dallas TX

International Classification:

B09B 300
F02D 311

US Classification:

405128

Abstract:

A technique for in situ decontamination of an earth formation. High gas temperatures can be achieved at subsurface formations by supplying a fuel at a subsurface location, such as at the bottom of a wellbore. Pressurized air or gas preheated to a temperature of about 700. degree. F. -1200. degree. F. is supplied to the wellbore to ignite the fuel. The combustion heat produced by the fuel further heats the preheated gas to temperatures in the range of 1200. degree. F. -4500. degree. , which heated gases are forced out of the borehole into the contaminated formation. Contaminants are thereby volatilized or oxidized and removed from the formation to the surface.