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US 9,869,146 B2Granted
Methods and apparatus for coring
AssigneeHalliburton Energy Services, Inc.
InventorsOlivier Mageren, Aurelien Chauviere, Khac Nguyen Che
Life of this patent
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Abstract
Described herein is an inner tube for a core barrel which has a structure adapted to retain lubricant for lubricating a sampled core. The internal surface of the inner tube includes a plurality of structures to retain lubricant adjacent a core received in the inner tube. An example structure is multiple alveoli in which lubricant is retained.
Claims22
A coring device, comprising:
- a core barrel assembly to receive a core from a bit, including,
- a core barrel, and
- a rigid inner tube secured in a fixed position in the core barrel and including a threaded connection at a first end of the rigid inner tube and a threaded connection at a second end of the rigid inner tube, the rigid inner tube defining an internal core receiving surface having multiple rigid structures that retain lubricant and are distributed circumferentially across the core receiving surface over substantially the entire length of the rigid inner tube, the retained lubricant disposed within the rigid structures to lubricate an outer portion of a sampled core within the rigid inner tube.
A coring device comprising:
- a threaded portion on at least one end thereof configured to threadably couple an inner tube within a core barrel of the coring device to define an internal core-receiving surface, wherein the rigid inner tube comprising a threaded connection at a first end of the inner tube and a threaded connection at a second end of the inner tube;
- and
- the core-receiving surface including multiple rigid structures that retain lubricant and are distributed circumferentially across the core-receiving surface over substantially the entire length of the core-receiving surface, the retained lubricant disposed within the rigid lubricant containment structures to lubricate an outer portion of a sampled core.
A method of obtaining a core, comprising:
- cutting a core with a cutting mechanism;
- receiving the core as it is cut in a rigid internal sleeve within a core barrel assembly;
- and
- wherein said receiving includes lubricating the received core through use of an inner surface of the rigid internal sleeve that includes at least one threaded end threadably coupled into the core barrel assembly, wherein the inner surface includes a plurality of alveoli fanned across the inner surface that are each configured to retain lubricant and are distributed circumferentially across the inner surface over substantially the entire length of the rigid internal sleeve, the retained lubricant disposed within the alveoli to lubricate an outer portion of the received core.
1 more element
Dependencies are inferred from the claim text.