Dynamic pressure lubrication drilling tool and drilling tool assembly with same
A drilling tool assembly and drilling tool technology, applied in the direction of drill pipe, drill pipe, drilling equipment, etc., can solve the problem of automatic separation of the outer surface of the drilling tool from the well wall or casing wall, etc., to improve drilling efficiency and reduce friction Effect of loss and surface wear, reduced complexity and cost
A drilling tool assembly and drilling tool technology, applied in the direction of drill pipe, drill pipe, drilling equipment, etc., can solve the problem of automatic separation of the outer surface of the drilling tool from the well wall or casing wall, etc., to improve drilling efficiency and reduce friction Effect of loss and surface wear, reduced complexity and cost
CN102425382BInactive Publication Date: 2014-06-25CHINA UNIV OF PETROLEUM (BEIJING)
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[0040] A dynamic pressure lubrication drilling tool proposed by the present invention includes: a hollow central shaft, a casing sleeved on the outside of the central shaft, and a groove formed between the inner wall of the casing and the outer peripheral surface of the Annulus; at least one rotor is provided on the inner wall of the housing, each rotor has a plurality of inwardly protruding rotor blades, and the rotor blades are located in the annulus; the central shaft More than one split hole is provided on the side wall of the casing, and the drilling fluid entering the central shaft can impact the rotor blades after passing through the split holes so that the casing can rotate relative to the central shaft.
[0041] Further, the central axis is composed of an upper joint, a water cap joint, a central pipe, and a lower joint, which are screwed and fixedly connected in turn. A plurality of the split holes are uniformly distributed on the side wall of the water cap joint, and...
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The invention relates to a dynamic pressure lubrication drilling tool and a drilling tool assembly. The dynamic pressure lubrication drilling tool comprises a central shaft, wherein a shell can be sleeved on the outer part of the central shaft in a rotating manner relative to the central shaft, and an annular space is formed between the inner wall of the shell and the peripheral surface of the central shaft; more than one rotor is arranged on the inner wall of the shell, each rotor is provided with a plurality of inwards protruding rotor blades, and the rotor blades are positioned in the annular space; and the side wall of the central shaft is provided with more than one shunting hole. The drilling tool assembly is provided with a drill column, wherein the drill column comprises a plurality of sequentially connected conventional drilling tools and at least one dynamic pressure lubrication drilling tool; and the dynamic pressure lubrication drilling tool is arranged between two adjacent conventional drilling tools. when a well is drilled, the drilling tool assembly brings drilling fluid to the space between the drilling tool and a well wall or a sleeve wall under the fluid pumping action when the dynamic pressure lubrication drilling tool rotates, and the outer surface of the drilling tool is separated from the well wall or the sleeve wall, so that dry friction or boundary friction between the outer surface of the drilling tool and the well wall or the sleeve wall is changed into fluid friction.
Description
technical field [0001] The invention relates to a drilling tool, in particular to a drilling tool that can use the pumping action of the drilling tool itself to bring the drilling fluid into the friction surface between the outer surface of the drilling tool and the well wall or casing wall, and connect the outer surface of the drilling tool with the friction surface of the casing wall. The well wall or casing wall is separated, and the dry friction or boundary friction between the outer surface of the drilling tool and the well wall or casing wall is changed to a dynamic pressure lubricated drilling tool, and the dynamic pressure lubricated drilling tool can be used during drilling. A drill tool assembly that prevents well deviation. Background technique [0002] During the drilling process, the problem of anti-deviation for vertical wells has always been one of the difficult problems in the field of oil and gas drilling, especially when drilling in inclined formations in h...
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Patent Timeline
25 Jun 2014
Publication
CN102425382B
- IPC
- E21B17/18; E21B17/042; E21B7/10
- Inventors
- 刘忠; 吴德银