Blade cover
AssigneeSchlumberger Technology Corporation
InventorsHuimin Song, Youhe Zhang, Sudarsanam Chellappa, Ting Ren
Life of this patent
Estimating the term…
Abstract
A blade on a downhole drilling tool includes a blade body and a blade cover. The blade cover is pre-sintered and conforming to the blade outer shape. The blade cover is attached to the blade body. The blade cover includes a seamless connection between a cover leading face and a cover outer face to reduce wear on the outer face of the blade.
Claims18
A pre-sintered blade cover for connecting to a blade body of a blade of a downhole tool, the blade body including a body leading face, a body outer face, a first keying feature, and a cutter pocket, the pre-sintered blade cover comprising:
- a cover leading face configured to connect to the body leading face of the blade of the downhole tool;
- a cover outer face configured to connect to the body outer face of the blade, wherein the cover outer face extends past a trailing edge of the cutter pocket of the blade, and wherein the cover leading face and the cover outer face are integrally formed;
- and
- a second keying feature complementary to the first keying feature of the blade body, wherein the first keying feature and the second keying feature are configured to align the pre-sintered blade cover on the blade body.
A downhole tool, comprising:
- a body;
- a blade connected to the body, the blade including a first keying feature;
- and
- a blade cover brazed to the blade with a cover braze, the blade cover seamlessly extending from a cover leading face to a cover outer face, and the blade cover comprising a second keying feature complementary to the first keying feature of the blade, wherein the first keying feature and the second keying feature are configured to align the blade cover on the blade.
A method of forming a downhole tool, comprising:
- providing a body, the body comprising a blade, the blade comprising a first kaying feature, body leading face, and body outer face;
- providing a pre-sintered blade cover, the pre-sintered blade cover comprising
- a second keying feature, a cover leading face, and a cover outer face, wherein the second keying feature is complementary to the first keying feature of the blade, and wherein the first keying feature and the second keying feature are configured to align the pre-sintered blade cover on the blade;
- connecting the pre-sintered blade cover to the blade such that the first keying feature is engaged with the second keying feature and the cover outer face covers at least part of the body outer face;
- and
- forming a cutter pocket in the pre-sintered blade cover and the blade after connecting the pre-sintered blade cover to the blade by removing at least a portion of the pre-sintered blade cover and at least a portion of the blade.
Dependencies are inferred from the claim text.