Method and apparatus for detecting orientation of downhole geophones
AssigneeHalliburton Geophysical Services, Inc.
InventorsBritt Hill, Hanna Khalil, Robert Albers
Life of this patent
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Abstract
A method and apparatus for detecting the orientation of downhole geophones are provided. A gamma ray source is secured to a casing enclosing a geophone such that the location of the gamma ray source with respect to the orientation of a geophone is known. The geophone is secured to tubing such that the orientation of the geophone with respect to the tubing is known. The tubing, with attached geophone, is secured downhole. A gamma ray logging tool is run the length of the tubing. The orientation of the downhole geophone is determined from the gamma ray log.
Claims23
A downhole geophone assembly comprising:
- at least one geophone;
- a casing enclosing at least one geophone;
- means for securing a high frequency electro-magnetic radiation radiating source to the geophone assembly such that the location of the radiating source with respect to the orientation of the geophone is known;
- tubing having an internal surface and an exterior surface;
- and
- means for securing the geophone to the exterior surface of the tubing.
A downhole geophone assembly, comprising:
- at lease one geophone package, wherein each geophone package includes an array of one or more geophones, and wherein the orientation of at least one of the geophones with respect to the geophone package is known;
- a casing securely enclosing at least one geophone package;
- means for securing at least one high frequency electro-magnetic radiation radiating source to the geophone assembly such that the location of the radiating source with respect to the orientation of the geophone package is known;
- tubing having an internal surface and an exterior surface;
- and
- means for securing the geophone package to the exterior surface of the tubing.
A method of detecting the orientation of downhole geophones in a geophone assembly comprising:
- determining the orientation of at least one geophone in the geophone assembly;
- securing a detectable radiating source to the geophone assembly such that the location of the radiating source with respect to the geophone in the preceding step is known;
- securing the geophone assembly to tubing;
- lowering the tubing into position downhole;
- determining the orientation of the geophones by detecting the radiating source using a radiating source detector.
The apparatus of claim further comprising a means for detecting the location of the radiating source downhole.
A method of detecting the downhole location of downhole geophones in a geophone assembly comprising:
- securing a detectable radiating source to the geophone assembly;
- securing the geophone assembly to tubing;
- lowering the tubing downhole;
- and
- determining the depth of the geophone by detecting the radiating source using a radiating source detector.
Dependencies are inferred from the claim text.