Formation evaluation while drilling
First Claim
Patent Images
1. A tool comprising:
- a drill collar having a first end, a second end, and an outer wall extending between the first and second ends;
a passage for conducting a drilling fluid through the drill collar;
a plurality of cavities disposed in the drill collar circumferentially about the passage and each accessible through a respective opening extending through the outer wall to the respective cavity;
a plurality of sample chambers each positionable in one of the respective cavities; and
a mandrel having a primary flowline disposed therein to convey a downhole fluid through the drill collar, wherein the mandrel extends through the passage such that the passage conducts the drilling fluid through the drill collar between the mandrel and the outer wall.
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Abstract
In one embodiment, a sampling while drilling tool includes a drill collar having a first end, a second end, an outer wall extending between the first and second ends, and at least one opening extending through the outer wall to a cavity within the drill collar. The sampling while drilling tool also includes a sample chamber positionable in the cavity through the opening in the outer wall and a passage for conducting a drilling fluid through the drill collar.
92 Citations
20 Claims
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1. A tool comprising:
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a drill collar having a first end, a second end, and an outer wall extending between the first and second ends; a passage for conducting a drilling fluid through the drill collar; a plurality of cavities disposed in the drill collar circumferentially about the passage and each accessible through a respective opening extending through the outer wall to the respective cavity; a plurality of sample chambers each positionable in one of the respective cavities; and a mandrel having a primary flowline disposed therein to convey a downhole fluid through the drill collar, wherein the mandrel extends through the passage such that the passage conducts the drilling fluid through the drill collar between the mandrel and the outer wall. - View Dependent Claims (2, 3, 4)
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5. A method comprising:
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positioning a sample chamber through an opening in an outer wall of a drill collar, wherein the outer wall extends between first and second ends of the drill collar; and conducting a drilling fluid through a passage in the drill collar, wherein conducting the drilling fluid though the passage comprises conducting the drilling fluid between a mandrel disposed in the drill collar and the outer wall, and wherein the sample chamber is disposed in the drill collar radially outward from the passage. - View Dependent Claims (6, 7, 8, 9)
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10. A tool comprising:
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a drill collar having a first end, a second end, and an outer wall extending between the first and second ends; a passage for conducting a drilling fluid through the drill collar, wherein the passage is disposed circumferentially about a mandrel disposed within the drill collar such that the passage conducts the drilling fluid through the drill collar between the mandrel and the outer wall; a plurality of cavities disposed in the drill collar circumferentially about the passage and each accessible through a respective opening extending through the outer wall to the respective cavity; and a plurality of sample chambers each positionable in one of the respective cavities. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A tool comprising:
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a drill collar having a first end, a second end, and an outer wall extending between the first and second ends; a passage for conducting a drilling fluid through the drill collar; a plurality of cavities disposed in the drill collar circumferentially about the passage and each accessible through a respective opening extending through the outer wall to the respective cavity; and a plurality of sample chambers each positionable in one of the respective cavities; wherein the passage comprises a plurality of lobes each positioned between neighboring ones of the plurality of cavities.
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Specification