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Multiple-loading-coupled mechanical hydraulic type rock breaking tool and drill string

A multi-load coupling, liquid-type technology, applied in liquid/gas jet drilling, driving devices for rotary combined drilling, drill pipes, etc., can solve the problems of decreased drilling efficiency, shortened life of drill bits, and reduced rock breaking efficiency of drill bits. , to achieve the effect of shortening drilling cycle and high rock breaking energy

Inactive Publication Date: 2019-06-25
中石化石油工程技术服务有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the gradual acceleration of oil and gas exploration and development, the exploration area continues to expand, and the drilling depth continues to increase. The hardness and strength of the rock will increase significantly under the confining pressure of the deep formation, causing the rock-breaking efficiency of the drill bit to decrease as the depth increases. The timeliness continues to decline, and the life of the drill bit continues to shorten

Method used

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  • Multiple-loading-coupled mechanical hydraulic type rock breaking tool and drill string
  • Multiple-loading-coupled mechanical hydraulic type rock breaking tool and drill string
  • Multiple-loading-coupled mechanical hydraulic type rock breaking tool and drill string

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] see Figure 1 to Figure 4 , figure 1 It is a schematic diagram of a multi-load coupled mechanical-hydraulic rock-breaking tool provided in Embodiment 1 of the present invention; figure 2 Yes figure 1 A-A cross-sectional schematic diagram in ; image 3 Yes figure 1 B-B cross-sectional schematic diagram in ; Figure 4 Yes figure 1 Schematic diagram of middle pieces 8 and 9.

[0036] A multi-load coupled mechanical-hydraulic rock-breaking tool provided in Embodiment 1 includes an upper transmission shaft 5, a lower transmission shaft 11, a drill joint 21, and a rotatably connected shaft that is sleeved on the outside of the upper transmission shaft 5 and connected with the upper transmission shaft 5. case.

[0037] Wherein, the inside of the upper transmission shaft 5 is provided with a first liquid flow channel I, and the lower end portion of the outer surface of the upper transmission shaft 5 has a first transmission surface 22;

[0038] The upper end of the low...

Embodiment 2

[0068] like figure 2 As shown, in the first embodiment, the first transmission surface 22 is a regular hexagon transmission surface, and the second transmission surface 23 is a spline transmission surface. The difference between the second embodiment and the first embodiment is only that the shape of the first transmission surface 22 is different. In the second embodiment, the first transmission surface 22 is a square transmission surface.

[0069] The present invention also provides a drill string, which includes the mechanical-hydraulic rock-breaking tool disclosed in the above embodiments. Since the mechanical-hydraulic rock-breaking tool disclosed in the above-mentioned embodiments has the above-mentioned technical effects, the drill string having the mechanical-hydraulic rock-breaking tool also has the above-mentioned technical effects, which will not be repeated here.

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Abstract

The invention provides a multiple-loading-coupled mechanical hydraulic type rock breaking tool and a drill string. The mechanical hydraulic type rock breaking tool comprises an upper transmission shaft (5), a lower transmission shaft (11), a drill bit adapter (21) and a shell rotatably connected with the upper transmission shaft (5), and an axial thrust structure is arranged between the upper transmission shaft (5) and the shell; a first liquid flow passage is arranged on the upper transmission shaft (5), a self-oscillation cavity is formed in the lower transmission shaft (11), and a second liquid flow passage is arranged on the drill bit adapter (21); the upper end of the lower transmission shaft (11) sleeves a first transmission surface (22) of the upper transmission shaft (5), and the outer surface of the upper end is provided with a second transmission surface (23) for connecting a lower roller seat (9); and an upper roller seat (7) corresponding to the lower roller seat (9) is mounted inside the shell, and the upper roller seat (7) is located above the lower roller seat (9). The mechanical hydraulic type rock breaking tool provided by the invention can realize multiple-loadingcoupling, and acquisition of relatively high rock breaking energy for the drilling tool is facilitated.

Description

technical field [0001] The invention relates to the technical field of drilling operations, in particular to a mechanical-hydraulic rock-breaking tool and a drill string coupled with multiple loads. Background technique [0002] With the gradual acceleration of oil and gas exploration and development, the exploration area continues to expand, and the drilling depth continues to increase. The hardness and strength of the rock will increase significantly under the confining pressure of the deep formation, causing the rock-breaking efficiency of the drill bit to decrease as the depth increases. The aging continues to decline, and the life of the drill bit continues to shorten. [0003] Due to the ubiquitous problems of insufficient rock-breaking energy and high rock-breaking resistance of the drill bit, single rotary drilling can no longer meet the drilling timeliness requirements in deep hard formations and soft-hard interlaced formations. For weak points such as low tensile ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B6/00E21B7/18E21B17/042E21B17/046
Inventor 甘心兰凯李帮民王惠文李伟廷侯树刚
Owner 中石化石油工程技术服务有限公司