GB201210694D0 - Variable frequency non-destructive borehole seismic source - Google Patents

Variable frequency non-destructive borehole seismic source

Info

Publication number
GB201210694D0
GB201210694D0 GBGB1210694.4A GB201210694A GB201210694D0 GB 201210694 D0 GB201210694 D0 GB 201210694D0 GB 201210694 A GB201210694 A GB 201210694A GB 201210694 D0 GB201210694 D0 GB 201210694D0
Authority
GB
United Kingdom
Prior art keywords
springs
varied
stiffness
source
seismic source
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
GBGB1210694.4A
Other versions
GB2503036A (en
GB2503036B (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.)
Mecon Ltd
Original Assignee
Mecon Ltd
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 Mecon Ltd filed Critical Mecon Ltd
Priority to GB1210694.4A priority Critical patent/GB2503036B/en
Publication of GB201210694D0 publication Critical patent/GB201210694D0/en
Publication of GB2503036A publication Critical patent/GB2503036A/en
Application granted granted Critical
Publication of GB2503036B publication Critical patent/GB2503036B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/02—Generating seismic energy
    • G01V1/159—Generating seismic energy using piezoelectric or magnetostrictive driving means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/02—Generating seismic energy
    • G01V1/143—Generating seismic energy using mechanical driving means, e.g. motor driven shaft
    • G01V1/155—Generating seismic energy using mechanical driving means, e.g. motor driven shaft using reciprocating masses
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V2210/00—Details of seismic processing or analysis
    • G01V2210/10—Aspects of acoustic signal generation or detection
    • G01V2210/12—Signal generation
    • G01V2210/129—Source location
    • G01V2210/1299—Subsurface, e.g. in borehole or below weathering layer or mud line

Landscapes

  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Acoustics & Sound (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Vibration Prevention Devices (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

The borehole seismic source is based on a mechanical resonator consisting of a mass 3,23 and a pair of springs 4,24, whose stiffness can be varied by varying their length. The springs are either gas springs 4 with constant pressure or super-linear mechanical springs 24. The resonance is excited mechanically at its natural frequency e.g. by means of an electromagnetic actuator 11,12,31,32. This natural frequency is varied in a controlled manner by varying the stiffness of the springs. The reaction mass excites the casing of the device via the springs. The casing is clamped 13,33 to the well sides 1,21, and produces a strong source of P- and S-waves. The resonator provides an energy reservoir and, when energised, acts in the manner of an impedance transformer, enabling much higher forces to be exerted on the well sides than the forces generated by the electromagnetic actuator. The spring stiffness can be varied continuously to produce a swept sinusoidal output. The source can generate very low frequencies, e.g. 2 Hz.
GB1210694.4A 2012-06-15 2012-06-15 Variable frequency non-destructive borehole seismic source Expired - Fee Related GB2503036B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1210694.4A GB2503036B (en) 2012-06-15 2012-06-15 Variable frequency non-destructive borehole seismic source

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1210694.4A GB2503036B (en) 2012-06-15 2012-06-15 Variable frequency non-destructive borehole seismic source

Publications (3)

Publication Number Publication Date
GB201210694D0 true GB201210694D0 (en) 2012-08-01
GB2503036A GB2503036A (en) 2013-12-18
GB2503036B GB2503036B (en) 2017-09-06

Family

ID=46641026

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1210694.4A Expired - Fee Related GB2503036B (en) 2012-06-15 2012-06-15 Variable frequency non-destructive borehole seismic source

Country Status (1)

Country Link
GB (1) GB2503036B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107544088A (en) * 2017-11-02 2018-01-05 西南石油大学 A kind of gas drilling underground controlled source pipe nipple

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104656153B (en) * 2015-01-29 2015-09-02 武汉长盛煤安科技有限公司 With brill Borehole Electromagnetic Wave Techniques tomography forward probe device and method
CN105467433B (en) * 2016-01-19 2017-10-27 西安弘传科技开发有限责任公司 The seismic source apparatus actively unlocked in well

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5331607A (en) * 1993-02-23 1994-07-19 Roessler Dennis E Sweep frequency vibrator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107544088A (en) * 2017-11-02 2018-01-05 西南石油大学 A kind of gas drilling underground controlled source pipe nipple
CN107544088B (en) * 2017-11-02 2024-01-23 西南石油大学 Underground controllable seismic source nipple for gas drilling

Also Published As

Publication number Publication date
GB2503036A (en) 2013-12-18
GB2503036B (en) 2017-09-06

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20171206