Donald S Grosso

US Patent:

47332328, Mar 22, 1988

Filed:

Dec 1, 1986

Appl. No.:

6/936351

Inventors:

Donald S. Grosso - West Hartford CT

Assignee:

Teleco Oilfield Services Inc. - Meriden CT

International Classification:

G01V 100
H04H 900
E21B 4700

US Classification:

340861

Abstract:

The infusion of fluid from the formation being drilled into a borehole is detected by modulating the drilling fluid stream in the drill pipe and detecting pressure variations commensurate with the modulation at the surface in the annulus between the drill pipe and wall of the well. The detected pressure variations are compared in phase and/or amplitude with their own near term past history or with the drilling fluid pressure variations in the drill pipe resulting from the modulation. Variations in phase or amplitude which can not be attributed to changes in the drilling operation will be indicative of fluid infusion.

US Patent:

46765743, Jun 30, 1987

Filed:

May 20, 1986

Appl. No.:

6/865158

Inventors:

Donald S. Grosso - West Hartford CT
Brian V. Park - Portland CT

Assignee:

Teleco Oilfield Services Inc. - Meriden CT

International Classification:

H01R 1352

US Classification:

439271

Abstract:

An explosion and flame proof electrical connector protective assembly is presented which comprises an explosion proof cylindrical housing threadably connected at each end to explosion proof gland members. A pair of disconnectable conventional, i. e. non-explosion proof, connector elements, each leading from ends of respective cables, are disposed and connected within the housing and gland members. Both gland members are tightly sealed to the respective cables forming a protective explosion proof environment within the housing for the attached connector elements. The protective assembly of the present invention is especially well suited for use in extremely hazardous environments such as Class 1, Division 1 hazardous areas as defined by the National Electric Code (NEC) and which are associated with oil rigs and the like.

US Patent:

47332336, Mar 22, 1988

Filed:

Dec 1, 1986

Appl. No.:

6/936185

Inventors:

Donald S. Grosso - West Hartford CT
G. Robert Feeley - Middletown CT

Assignee:

Teleco Oilfield Services Inc. - Meriden CT

International Classification:

G01V 100
H04H 900
B21B 4700

US Classification:

340861

Abstract:

The infusion of fluid from the formation being drilled into a borehole is detected in an MWD system by modulating the drilling fluid stream in the drill pipe and detecting pressure variations commensurate with the modulation at the surface in the annulus between the drill pipe and wall of the well. Modulation to generate the pressure variations in the annulus is accomplished by the same pressure generating element used to generate pressure signals in the mud column for MWD measurements. The detected pressure variations are compared in phase and/or amplitude with their own near term past history or with the drilling fluid pressure variations in the drill pipe resulting from the modulation. Variations in phase or amplitude which can not be attributed to changes in the drilling operation will be indicative of fluid infusion.

US Patent:

51249537, Jun 23, 1992

Filed:

Jul 26, 1991

Appl. No.:

7/736397

Inventors:

Donald S. Grosso - West Hartford CT

Assignee:

Teleco Oilfield Services Inc. - Meriden CT

International Classification:

G01V 140

US Classification:

367 82

Abstract:

An apparatus and method for selecting a passband frequency for acoustically transmitting signals over a drillstring is presented. In accordance with the present invention, a series of electrical signals, each progressively increasing in frequency over a predetermined range, excite an acoustic transmitter producing an acoustic signal in the drillstring. The power spectral density of this signal is measured and correlated to a modeled power spectral density for the drillstring. A passband frequency having the strongest correlation ratio between the measured and modeled power spectral density is selected as the frequency for acoustical communication in the drillstring.

US Patent:

40139450, Mar 22, 1977

Filed:

May 12, 1975

Appl. No.:

5/576623

Inventors:

Donald S. Grosso - West Hartford CT

Assignee:

Teleco Inc. - Middletown CT

International Classification:

G01R 3304

US Classification:

324 34R

Abstract:

A rotation sensor and output signal processing apparatus is presented. The rotation sensor is a ring core flux gate magnetometer whose output varies as a function of the earth's magnetic field. The phase angle of the second harmonic of the magnetometer output is sensed to provide an indication of the state of rotation of the magnetometer. When a state of no rotation is sensed, actuating signals are delivered to a control system to sense borehole parameters and telemeter the parameters to the top of the borehole.

US Patent:

40217744, May 3, 1977

Filed:

Jun 23, 1976

Appl. No.:

5/699037

Inventors:

Einar Asmundsson - Middle Haddam CT
Donald S. Grosso - West Hartford CT

Assignee:

Teleco Inc. - Middletown CT

International Classification:

G01V 140
G01C 914
E21B 4722

US Classification:

340 18R

Abstract:

A borehole sensor is presented including a three axis gimbal device for determining (1) a vertical plane, using the force of gravity as a reference, (2) a horizontal plane, using the force of gravity as a reference, and (3) the north direction, using the earth's magnetic field as a reference. A motor drive system drives parts of the mechanism to desired positions about the three axes, and error transducers determine the deviation from desired positions about the axes and provide feedback to the motor drive system to eliminate the error.

US Patent:

45701237, Feb 11, 1986

Filed:

Nov 12, 1982

Appl. No.:

6/440754

Inventors:

Donald S. Grosso - West Hartford CT

Assignee:

Teleco Oilfield Services Inc. - Meriden CT

International Classification:

G01V 320
E21B 4900

US Classification:

324369

Abstract:

An array of electrodes is presented for accurate and improved measurement of borehole resistivity. The electrode array comprises five electrodes mounted on a relatively short insulated segment of a drill string. Current flows from the first electrode to the second electrode and is sensed by third and fourth electrodes. Any leakage current from the first electrode is collected by a fifth electrode and is kept isolated from the current flowing between the first and second electrodes thus insuring accurate determination of apparent formation resistivity. A current source, preferably a constant current source is used to determine the current in the circuit of the first and fifth electrodes.

US Patent:

52220486, Jun 22, 1993

Filed:

Nov 8, 1990

Appl. No.:

7/611036

Inventors:

Donald S. Grosso - West Hartford CT
Ali H. Abdallah - Rocky Hill CT

Assignee:

Eastman Teleco Company - Houston TX

International Classification:

G01V 100

US Classification:

367 32

Abstract:

Fluid influx in a borehole is determined by examining and monitoring the computed transfer function in the signal channel defined by the annulus between the borehole and a drillstring in the borehole.