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Composite oriented drilling equipment for coal mine underground complex stratum and application thereof

A technology of directional drilling and complex formation, applied in the direction of directional drilling, drilling equipment, drilling equipment and methods, etc., it can solve the problem that the influence of pressing force on drilling is not very large, there is no signal or signal due to poor contact, and copper cable drilling The rod structure is complex and other problems, to achieve the effect of facilitating hole cleaning, saving manpower, and reducing the risk of sticking

Pending Publication Date: 2018-09-28
SHAANXI TAIHE TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] 5. The degree of impact of WOB on combined steering force is not great
But this system has the following five disadvantages: first: the cost of processing copper cable drill pipe is high; second: the strength of the drill pipe is lower than that of ordinary drill pipe, which is easy to cause in-hole accidents such as broken drilling tools; third: due to the processing accuracy, Poor contact due to misoperation can easily lead to no signal or signal instability; fourth: due to technical complexity, it is not suitable for the construction of extended-reach directional wells, ultra-deep wells, and horizontal wells with ultra-long horizontal sections; fifth: copper cable drilling The structure of the rod is complicated, and the cost of later maintenance is high

Method used

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  • Composite oriented drilling equipment for coal mine underground complex stratum and application thereof
  • Composite oriented drilling equipment for coal mine underground complex stratum and application thereof
  • Composite oriented drilling equipment for coal mine underground complex stratum and application thereof

Examples

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Embodiment

[0042] This embodiment relates to a kind of compound directional drilling equipment of the present invention which relates to complex formations in coal mines, as shown in the attached figure 1 , 2 , 3, 4, and 5: including: drill pipe, directional screw motor, wireless electromagnetic wave measurement while drilling system 5, and drill bit 7; the connection relationship is as follows: drill bit 7 + directional screw motor 6 + wireless electromagnetic wave measurement while drilling system 5 + ordinary Drill pipe + water braid, all connection methods are screw connection; the directional screw motor 6 is connected to the drill pipe through the non-magnetic outer pipe 4, and the wireless electromagnetic wave measurement while drilling system 5 is set on the non-magnetic outer pipe 4 internal.

[0043] The drill bit 7 is a PDC drill bit, and the advantages of the PDC drill bit are mainly focused on two points: simple structure and high wear resistance of the drill bit. The arti...

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Abstract

The invention provides composite oriented drilling equipment for a coal mine underground complex stratum and application thereof. The composite oriented drilling equipment comprises a drilling tool, an oriented screw motor, a wireless electromagnetic wave while-drilling measuring system and a drill bit. The drill bit, the oriented screw motor, the wireless electromagnetic wave while-drilling measuring system, a normal drill stem and a water braid are connected in sequence in a screw-threading mode. Electromagnetic waves are used as a transmission medium, the depth of remote sensing is large, the transmission speed is high, the data transmission is reliable and effective, and adaptation to the underground drilling condition is high; the detected data in holes can be effectively transmittedby the normal drill stems and the stratum; compared with wired while-drilling measuring, the intensity of the drill stems is high, shearing strength and fatigue strength are better, manpower, materials and financial resources are saved; and the composite oriented drilling equipment for the coal mine underground complex stratum and the application thereof are a preferred mode and equipment for coalmine underground oriented drilling.

Description

technical field [0001] The invention relates to the field of underground tunnel drilling in coal mines, in particular to complex directional drilling equipment for complex underground strata in coal mines and an application thereof. Background technique [0002] Directional drilling technology originated in the field of oil and gas exploration and development. With the continuous development of drilling technology, this technology has gradually been introduced into new fields such as geological exploration and underground drilling in coal mines. Near-bit measurement-while-drilling directional drilling technology is a new technology in the field of coal mine drilling engineering. It is currently mainly used in coal mine gas drainage, water damage prevention and geological structure exploration and other drilling projects. In directional drilling construction, if the hole track dogleg (full angle change rate) is too large, it is easy to cause downhole accidents such as drill s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/04E21B10/55E21B47/013E21B47/13
CPCE21B7/046E21B10/55E21B47/01E21B47/13
Inventor 彭腊梅石明善朱国涛杨英男卢养茜
Owner SHAANXI TAIHE TECH CO LTD
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