Braking devices for use in drilling operations
AssigneeLongyear TM, Inc.
InventorChristopher L. Drenth
Life of this patent
Estimating the term…
Abstract
A braking device for drilling operations in a borehole includes a brake retainer having a plurality of brake connector openings defined therein, a body member having a tapered surface having a first diameter and a second diameter, the second diameter being larger than the first diameter, at least one brake element positioned at least partially between the brake retainer and the body member and in communication with the tapered surface and at least one of the brake connector openings, and a bias member configured to exert a biasing force on the body member to move the body member toward the brake retainer to move the brake element from contact with the first diameter of the tapered surface toward contact with the second diameter.
Claims18
A braking device for locking a core barrel assembly to a drill string, comprising:
- a brake retainer having a first end, a second end, and a plurality of brake connector openings defined therein;
- a body member having a tapered surface;
- at least one brake element positioned against said tapered surface of said body member, said at least one brake element being positioned at least partially within at least one of said plurality of brake connector openings;
- and
- a biasing member configured to bias said body member toward said first end of said brake retainer thereby pushing said at least one brake element into contact with the drill string;
- wherein said at least one brake element is maintained on said tapered surface of said body member when locking the core barrel assembly to the drill string.
A braking device for stopping a core barrel assembly within a drill string by engaging the inner surface of the drill string, comprising:
- a first member;
- a brake retainer coupled to the first member, the brake retainer including a first end, a second end, and a plurality of brake connector openings defined therein, said brake retainer being adapted to be secured between a retrieval member and an inner tube that is adapted to receive a core sample, wherein said first end is adapted to be positioned toward the retrieval member and said second end is adapted to be positioned toward the inner tube;
- a second member adapted to be received within said brake retainer, said second member having a tapered surface;
- and
- a plurality of brake elements positioned against said tapered surface, said plurality of brake elements being positioned at least partially within said plurality of the brake connector openings,
- wherein relative movement of said second member toward said first end of said brake retainer moves said plurality of brake elements at least partially radially outward of said plurality of the brake connector openings and into contact with the drill string.
A core drilling assembly adapted to be removably received within a drill string comprising:
- an inner tube adapted to receive a core sample;
- a retrieval member;
- and
- a brake device positioned between said retrieval member and said inner tube, said brake device including:
- a brake retainer having at least one brake connector opening defined therein,
- a inner member having an outer surface that tapers radially outward from a first end positioned toward said retrieval member to a second end positioned toward said inner tube, and
- at least one brake element positioned against said outer surface,
- wherein movement of said inner member toward said retrieval member causes said outer surface to force said at least one brake element at least partially radially outward of said at least one brake connector opening and into contact with the drill string.
Dependencies are inferred from the claim text.