FR2411958A1 - Borehole direction measuring device - having single-degree-of-freedom gyro and gravity sensors to give inclination and azimuth - Google Patents

Borehole direction measuring device - having single-degree-of-freedom gyro and gravity sensors to give inclination and azimuth

Info

Publication number
FR2411958A1
FR2411958A1 FR7738339A FR7738339A FR2411958A1 FR 2411958 A1 FR2411958 A1 FR 2411958A1 FR 7738339 A FR7738339 A FR 7738339A FR 7738339 A FR7738339 A FR 7738339A FR 2411958 A1 FR2411958 A1 FR 2411958A1
Authority
FR
France
Prior art keywords
degree
torquer
gimbals
azimuth
relative
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR7738339A
Other languages
French (fr)
Other versions
FR2411958B1 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to FR7738339A priority Critical patent/FR2411958A1/en
Publication of FR2411958A1 publication Critical patent/FR2411958A1/en
Application granted granted Critical
Publication of FR2411958B1 publication Critical patent/FR2411958B1/fr
Granted legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/02—Determining slope or direction
    • E21B47/022—Determining slope or direction of the borehole, e.g. using geomagnetism

Landscapes

  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Geophysics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Gyroscopes (AREA)

Abstract

A bore-hole direction measuring instrument has a gyro rotor mounted in a pair of gimbals to form a single degree of freedom gyro, a pick-up and torquer sensing and cancelling relative movement between the gimbals. A resolver measures the rotation of the torquer relative to the instrument casing and a gravity sensor unit measures gravity components along the axes. To survey a borehole, the pick-up and torquer continually operate to eliminate the relative rotation of the two gimbals and at a series of stations gravity components are sensed in three orthogonal directions relative to the outer gimbal. From these measurements the borehole inclination and azimuth are calculated for each station. The use of a single-degree of freedom gyro simplifies instrument design and makes gimbal bearing friction less critical.
FR7738339A 1977-12-19 1977-12-19 Borehole direction measuring device - having single-degree-of-freedom gyro and gravity sensors to give inclination and azimuth Granted FR2411958A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7738339A FR2411958A1 (en) 1977-12-19 1977-12-19 Borehole direction measuring device - having single-degree-of-freedom gyro and gravity sensors to give inclination and azimuth

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7738339A FR2411958A1 (en) 1977-12-19 1977-12-19 Borehole direction measuring device - having single-degree-of-freedom gyro and gravity sensors to give inclination and azimuth

Publications (2)

Publication Number Publication Date
FR2411958A1 true FR2411958A1 (en) 1979-07-13
FR2411958B1 FR2411958B1 (en) 1983-04-22

Family

ID=9199038

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7738339A Granted FR2411958A1 (en) 1977-12-19 1977-12-19 Borehole direction measuring device - having single-degree-of-freedom gyro and gravity sensors to give inclination and azimuth

Country Status (1)

Country Link
FR (1) FR2411958A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2068583A1 (en) * 1969-11-21 1971-08-27 Sperry Sun Well Surveying Co
US3808697A (en) * 1968-04-22 1974-05-07 E Hall Inclinometer
US3845569A (en) * 1972-02-09 1974-11-05 Selco Mining Corp Ltd Bore hole logging device
FR2241686A1 (en) * 1973-08-20 1975-03-21 Applied Tech Ass Gyroscopic method of testing alignment of a borehole - wherein a boring pipe instrumentation case signals azimuth and inclination
FR2410724A1 (en) * 1977-12-02 1979-06-29 Sagem IMPROVEMENTS MADE TO DEVICES FOR EXPLORATION, IN AZIMUT AND INCLINATION, OF A DRILLING LINE

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3808697A (en) * 1968-04-22 1974-05-07 E Hall Inclinometer
FR2068583A1 (en) * 1969-11-21 1971-08-27 Sperry Sun Well Surveying Co
US3845569A (en) * 1972-02-09 1974-11-05 Selco Mining Corp Ltd Bore hole logging device
FR2241686A1 (en) * 1973-08-20 1975-03-21 Applied Tech Ass Gyroscopic method of testing alignment of a borehole - wherein a boring pipe instrumentation case signals azimuth and inclination
FR2410724A1 (en) * 1977-12-02 1979-06-29 Sagem IMPROVEMENTS MADE TO DEVICES FOR EXPLORATION, IN AZIMUT AND INCLINATION, OF A DRILLING LINE

Also Published As

Publication number Publication date
FR2411958B1 (en) 1983-04-22

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Legal Events

Date Code Title Description
TP Transmission of property
CD Change of name or company name
TP Transmission of property
TP Transmission of property
TP Transmission of property
ST Notification of lapse