Dry-drilling drill bit and using method thereof

A drill bit, drilling and milling bit technology, applied in drill bits, earthwork drilling, drilling equipment, etc., can solve the problems of unpopular use and high cost of air drilling, and achieve high construction efficiency and prevent environmental pollution.

Inactive Publication Date: 2020-06-05
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Except for air drilling, there is currently no other mature dry drilling process in the oil drilling industry, but the cost of air drilling is too high to be widely used

Method used

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  • Dry-drilling drill bit and using method thereof
  • Dry-drilling drill bit and using method thereof
  • Dry-drilling drill bit and using method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] refer to figure 1 , is a structural schematic diagram of Embodiment 1 of the present invention, a dry drilling bit, including a dry drilling bit 1 and a drilling and milling bit 2 for breaking rock formations and transporting cuttings, the dry drilling bit 1 is a hollow cylindrical structure, and the drill Milling head 2 is fixedly connected to the central position in the hollow cylindrical structure of dry drilling bit 1, and the bottom of the drill bit end of drilling milling head 2 and the drill bit end of dry drilling bit 1.

[0028] In actual use: the dry drilling bit 1 is a hollow cylindrical structure, the drilling and milling head 2 is fixedly connected to the center of the hollow cylindrical structure of the dry drilling bit 1, and the bottom of the drill end of the drilling and milling head 2 is in contact with the dry drilling At the end of the drill bit 1, the dry drilling bit of the present invention can take out cuttings from the core of the drill bit with...

Embodiment 2

[0030] refer to figure 1 with image 3 , compared with Embodiment 1, the difference of this embodiment is: the dry drilling bit 1 drill bit end of the hollow cylindrical structure is distributed with a plurality of cutting blades 3 in the circumferential direction, and the cutting blades 3 are connected There are a plurality of cutting teeth 4, the cutting blade 3 is a cutting blade with an angle of 10°~60°, the side wall of the cutting blade and the end of the dry drill bit 1 form a side inclination angle along the circumferential direction, and the inclination angle is 5°~ 60°.

[0031] In actual use: a dry drilling bit 1 with a hollow cylindrical structure is distributed with multiple cutting blades 3 in the circumferential direction at one end of the drill bit, and the multiple cutting blades 3 are used for cutting rock formations, and multiple cutting teeth are connected to the cutting blades 3 4. A plurality of cutting teeth 4 increases the friction during cutting to i...

Embodiment 3

[0033] Compared with Embodiment 2, the difference of this embodiment lies in that: 4-12 cutting blades 3 are distributed in the circumferential direction of one end of the hollow cylindrical dry drilling bit 1 .

[0034] Preferably, there are six cutting blades 3 distributed in the circumferential direction of one end of the hollow cylindrical dry drilling bit 1 , and three cutting teeth 4 are connected to the cutting blades 3 .

[0035] In actual use: the dry drilling bit 1 with a hollow cylindrical structure has 4-12 cutting blades 3 distributed in the circumferential direction at one end, all of which are suitable for drilling in the surface layer with low requirements for drilling speed and soft lithology. The dry drilling bit 1 with a hollow cylindrical structure has six cutting blades 3 distributed in the circumferential direction at one end, and three cutting teeth 4 are connected to the cutting blades 3, so that the cutting efficiency is high during surface drilling.

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Abstract

The invention relates to the technical field of soft-formation anhydrous environment drilling construction, in particular to a dry-drying drill bit and a using method thereof. The dry-drying drill bitis a hollow cylindrical structure; a drilling and milling head is fixedly connected to the center position in a hollow cylindrical structure of the dry-drying drill bit; and the drill bit end part ofthe drilling and milling head abuts against the drill bit end part of the dry-drying drill bit. The dry-drying drill bit can take out rock debris from the center part of the drill bit without drilling fluid, transmits the rock debris into a sand catching basket above the drill bit, and returns to ground; a rock layer, around the periphery of the dry-drying drill bit, of the hollow cylindrical structure is firstly crushed by the dry-drying drill it, and the drilling and milling head crushes a rock layer on the middle part of the hollow cylindrical structure while height reaches the drill bit end part of the drilling and milling head; and the rock debris is transmitted into the sand catching basket above the drill bit, and returns to ground. The dry-drying drill bit disclosed by the invention is suitable for drilling construction of a surface layer with low drilling speed requirements and relatively soft lithology, and is high in construction efficiency.

Description

[0001] Technical field [0002] The invention relates to the technical field of drilling construction in an anhydrous environment in soft formations, in particular to a dry drilling bit and a using method thereof. Background technique [0003] In the construction of oil drilling in shallow and leaky formations, drilling fluid needs to be circulated to bring out cuttings. Drilling mud is easy to invade the formation, enter surface water or shallow groundwater, and cause environmental pollution. Except for air drilling, there is currently no other mature dry drilling process in the oil drilling industry, but the cost of air drilling is too high to be widely used. The primary problem of rotary dry drilling is to have a special drill bit that can take into account both efficient rock breaking and fast sand carrying. Contents of the invention [0004] The present invention overcomes the deficiencies of the prior art, and provides a dry drilling bit and its use method, in particu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/44E21B27/00E21B27/04E21B10/42
CPCE21B10/42E21B10/44E21B27/00E21B27/04
Inventor 陈霖宋顺平陈伟林王伟良何璟彬李德波杨森赵振华丛成赵莹白秀丽马煜刘晓燕
Owner BC P INC CHINA NAT PETROLEUM CORP
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