Logging-while-drilling optical apparatus
AssigneeSchlumberger Technology Corporation
InventorsOliver C. Mullins, Xu Wu
Life of this patent
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Abstract
A logging-while-drilling apparatus includes a source of exciting radiation, means for illuminating the borehole wall with the radiation and means for detecting radiation returning from the borehole resulting from illumination with the exciting radiation. A bottom hole assembly (BHA) incorporating such apparatus can comprise a drill bit, one or more stabilizers and one or more drill collars and the source and illuminating and detecting means can be located in one of these or distributed therebetween according to requirements. A window can be provided to allow illumination of the borehole and detection of returning radiation.
Claims48
Apparatus, comprising a logging-while-drilling apparatus for locating in situ hydrocarbons in underground formations surrounding a borehole, comprising:
- a) a tool body comprising at least one drill collar for connection to a drill string having a drill bit connected at an end thereof;
- b) a source of light in the body arranged to illuminate a wall of the borehole;
- c) a detector arranged to detect radiation from the borehole wall resulting from illumination by the source;
- and
- d) a window through which the borehole is illuminated and radiation is detected.
A logging-while-drilling apparatus for locating in situ hydrocarbons in underground formations surrounding a borehole, comprising:
- a) a tool body comprising at least one drill collar for connection to a drill string having a drill bit connected at an end thereof;
- b) a source of light in the body arranged to illuminate a wall of the borehole;
- and
- c) a detector arranged to detect radiation from the borehole wall resulting from illumination by the source.
Apparatus for logging undergound formations surrounding a borehole during drilling using a bottom hole assembly including a drill bit, comprising:
- a) a source of light in the bottom hole assembly arranged to illuminate the borehole at the drill bit;
- and
- b) a detector arranged to detect radiation from the borehole at the drill bit.
Apparatus for logging undergound formations surrounding a borehole during drilling using a bottom hole assembly including a drill bit, comprising:
- a) a source of light in the bottom hole assembly arranged to illuminate the borehole immediately behind the drill bit;
- and
- b) a detector arranged to detect radiation from the borehole immediately behind the drill bit.
Dependencies are inferred from the claim text.