Don Grosso (April 12, 1915 May 14, 1985) was a Canadian ice hockey forward. He was born in Sault Ste. Marie, Ontario. Grosso started his National Hockey ...
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.
Explosion And Flame Proof Electrical Connector Protective Assembly
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.
Method And Apparatus For Borehole Fluid Influx Detection
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.
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.
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.
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.
Electrode Array For Measurement Of Borehole Resistivity
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.
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.