Harold E Peelman

US Patent:

39492320, Apr 6, 1976

Filed:

Sep 30, 1974

Appl. No.:

5/510661

Inventors:

Obie M. Langford - Houston TX
Harold E. Peelman - Houston TX

Assignee:

Texaco Inc. - New York NY

International Classification:

G21G 402

US Classification:

250501

Abstract:

A well-logging sonde employes a neutron generator. It has a high-voltage supply for the target of the neutron generator tube. The sonde includes an insulated high-voltage conductor for connecting the supply to target, and there is a metallic ring supported on the insulation surrounding the conductor. The ring and conductor form a capacitor that is connected to a circuit for controlling the deenergization of the high-voltage supply if an arc occurs.

US Patent:

41999533, Apr 29, 1980

Filed:

Jan 19, 1978

Appl. No.:

5/870560

Inventors:

Albert P. Richter - Houston TX
Harold E. Peelman - Houston TX

Assignee:

Texaco Inc. - White Plains NY

International Classification:

F25B 2102
F25B 1900

US Classification:

62 3

Abstract:

A radiation detector assembly is enclosed in a heat pipe which is positioned in a dewar flask. A thermo-electric cooler is joined to one end of the heat pipe. The heat exhaust of the thermo-electric cooler is communicated to a heat dissipation device in the form of a fin assembly. A thermistor senses the temperature at the heat pipe. When the thermistor indicates a temperature in excess of that corresponding to a reference signal, a control singal is produced by a control device to cause a power source to operate the thermo-electric cooler to remove heat from the heat pipe to the fin assembly. The vacuum within the dewar flask effectively limits the environmental heat passing to the heat pipe to radiant heat. The detector assembly and temperature stabilization system may extend to the interior of a conduit or other housing containing material whose radiation is to be detected, while the fin assembly is exposed to the atmosphere. In particular, the temperature stabilization system may be used in conjunction with a detector comprising a scintillation crystal optically coupled to a photomultiplier tube in an environment which would otherwise diminish the performance of such a detector by raising its temperature.

US Patent:

43508880, Sep 21, 1982

Filed:

Sep 2, 1980

Appl. No.:

6/183516

Inventors:

Harold E. Peelman - Houston TX

Assignee:

Halliburton Company - Duncan OK

International Classification:

G01V 500

US Classification:

250270

Abstract:

Methods and apparatus are provided for determining the thermal neutron lifetime of earth formations in the vicinity of a well borehole. The borehole environs are irradiated with pulses of fast neutrons. Between neutron pulses capture gamma rays are detected in at least six, non-overlapping, sequential time intervals and count rate signals representative thereof are generated. Comparisons of the six count rate signals are made to determine which ones have been affected by a borehole component. Only those count rate signals not affected by the borehole component are used to determine the thermal neutron lifetime by a least-squares fitting technique.

US Patent:

42283507, Oct 14, 1980

Filed:

Dec 12, 1977

Appl. No.:

5/859357

Inventors:

Hans J. Paap - Houston TX
Albert P. Richter - Houston TX
Harold E. Peelman - Houston TX
Dan M. Arnold - Houston TX
Hubert D. Scott - Houston TX

Assignee:

Texaco Inc. - White Plains NY

International Classification:

G01V 500

US Classification:

250267

Abstract:

An underground logging tool is equipped with a gamma ray detector encircled by a rotatable shield featuring a collimator slot. After the fluid in a formation is activated by a neutron source, the detector is used to obtain radiation count information as a function of horizontal direction as the shield is rotated. Comparison of count rate data as a function of the shield slot orientation gives information concerning the direction of the formation fluid flow. Measurements at different time intervals following the activation of the fluid, made with the shield retracted from the detector, may also be interpreted in terms of speed of horizontal fluid flow past the tool.

US Patent:

39885810, Oct 26, 1976

Filed:

Apr 14, 1975

Appl. No.:

5/567786

Inventors:

Harold E. Peelman - Houston TX
Dan M. Arnold - Houston TX
Robert W. Pitts - Houston TX

Assignee:

Texaco Inc. - New York NY

International Classification:

G01V 500

US Classification:

250270

Abstract:

Earth formations in the vicinity of a well borehole are repetitively bombarded with bursts of high energy neutrons. A radiation detector in a sonde in the borehole senses the gamma rays induced by the capture of thermal neutrons and sends signals representative thereof to the surface. At the surface, two single channel energy analyzers, such as from 1. 30 to 2. 92 Mev and from 3. 43 to 10. 0 Mev, sense the formation thermal neutron capture gamma ray response after each neutron burst. The counts of thermal neutron capture gamma rays in these analyzers are used to distinguish between the presence of salt water and hydrocarbons, which is logged. By controlling the repetition rate of the neutron source, measured counting rates in formations with relatively large thermal neutron lifetimes are emphasized, compensating for borehole effects which could otherwise give rise to erroneous results in shale formations, which have a high boron content.

US Patent:

42454794, Jan 20, 1981

Filed:

Nov 15, 1978

Appl. No.:

5/961080

Inventors:

Albert P. Richter - Houston TX
Harold E. Peelman - Houston TX

Assignee:

Texaco Inc. - White Plains NY

International Classification:

F25D 1500
F25B 2102
F25B 1900

US Classification:

62119

Abstract:

A radiation detector assembly is enclosed in a heat pipe which is positioned in a dewar flask. A thermo-electric cooler is joined to one end of the heat pipe. The heat exhaust of the thermo-electric cooler is communicated to a heat dissipation device in the form of a fin assembly. A thermistor senses the temperature at the heat pipe. When the thermistor indicates a temperature in excess of that corresponding to a reference signal, a control signal is produced by a control device to cause a power source to operate the thermo-electric cooler to remove heat from the heat pipe to the fin assembly. The vacuum within the dewar flask effectively limits the environmental heat passing to the heat pipe to radiant heat. The detector assembly and temperature stabilization system may extend to the interior of a conduit or other housing containing material whose radiation is to be detected, while the fin assembly is exposed to the atmosphere. In particular, the temperature stabilization system may be used in conjunction with a detector comprising a scintillation crystal optically coupled to a photomultiplier tube in an environment which would otherwise diminish the performance of such a detector by raising its temperature.

US Patent:

39433625, Mar 9, 1976

Filed:

Jan 18, 1974

Appl. No.:

5/435133

Inventors:

Harold E. Peelman - Houston TX

Assignee:

Texaco Inc. - New York NY

International Classification:

G01V 500

US Classification:

250256

Abstract:

Disclosed is a well logging system for performing a continuous log of the oxygen and silicon content of earth formations in the vicinity of a well bore. A downhole sonde housing a pulsed source of 14 mev neutrons is used to irradiate earth formations in the vicinity of the well bore. A NaI (T1) detector spaced approximately 253/8 inches from the source detects gamma rays caused by neutron activation of elemental oxygen and silicon in the formations and produces voltage pulses representative of the elemental oxygen and silicon. The voltage pulses are transmitted to the surface where they are separated, corrected for background radiation and plotted continuously as a function of bore hole depth. The resultant well log traces may be interpreted in terms of lithology or formation water saturation by the use of disclosed techniques.

US Patent:

43885292, Jun 14, 1983

Filed:

Jun 23, 1982

Appl. No.:

6/391204

Inventors:

Harold E. Peelman - Houston TX

Assignee:

Halliburton Company - Duncan OK

International Classification:

G01V 500

US Classification:

250270

Abstract:

A system is disclosed for measuring simultaneously the formation and borehole components of thermal neutron lifetime or decay time. The borehole and formation are irradiated with 14 MEV pulsed neutrons. During the internal between neutron pulses capture gamma radiation is measured in at least four, non-overlapping, contiguous time gates. A background radiation measurement is also periodically made. Background corrected capture gamma ray measurements are combined to derive simultaneously the formation and borehole components of thermal neutron lifetime which are recorded as a function of borehole depth.