Drill pipes suitable for extended reach drilling in slim holes

A technology of large displacement and drill pipe, applied in the direction of drill pipe, drilling equipment, drill pipe, etc., can solve the problems of low strength of drill pipe, not suitable for drilling, and can not be used for drilling, so as to simplify the oil drilling process and improve the resistance Torsional strength and the effect of improving drilling efficiency

Active Publication Date: 2019-01-29
DP MASTER MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, conventional drill pipes are not suitable for this kind of drilling in small holes and large displacements: one is that the strength of conventional drill pipes is not high and cannot be used for this kind of drilling; the other is the process of inserting tubing after drilling holes with drill pipes Cumbersome, more difficult and costly to operate in this more complex drilling

Method used

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  • Drill pipes suitable for extended reach drilling in slim holes
  • Drill pipes suitable for extended reach drilling in slim holes
  • Drill pipes suitable for extended reach drilling in slim holes

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Embodiment Construction

[0014] See Figure 1 to Figure 3 , The present invention relates to a drill pipe suitable for long-distance drilling in a small hole, comprising a drill pipe 1 and an oil pipe 2. The drill pipe 1 is composed of a main rod 1.1 in the middle and a male joint 1.2 and a female joint 1.3 at both ends. 2 is placed inside the drill pipe 1, wherein the middle section of the oil pipe 2 is covered with a plurality of spring centralizers 3, the spring centralizer 3 is used to position the oil pipe 2 and jam the inner wall of the main rod 1.1 to prevent the oil pipe 2 Shaking, the oil pipe 2 is respectively provided with block centralizers 4 near the two ends. The block centralizer 4 is also used to position the oil pipe 2 and jam the inner walls of the male connector 1.2 and the female connector 1.3 to prevent the oil pipe 2 Shaking, when two oil drill pipes are connected, the drill pipe 1 is fitted with a male joint 1.2 and a female joint 1.3 threaded connection, and the oil pipe 2 is sn...

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Abstract

The invention relates to a drilling rod applicable to small-well-hole and large-displacement well drilling. The drilling rod does not need to be subjected to procedures of pulling out the drilling rod, piling a support and inserting an oil pipe, a petroleum drilling process is simplified, the petroleum drilling efficiency is improved and the cost is saved; meanwhile, a secondary shoulder is additionally arranged at an engaged part of a male buckle small end and a female buckle large end; the secondary shoulder and a main shoulder form a double-shoulder structure; a main shoulder face and a thread section have certain interference fit and the secondary shoulder just has a certain auxiliary upper buckle positioning function, so that the interference fit between the main shoulder face and the thread section is accurately realized; and furthermore, the secondary shoulder can also bear one part of load at a working state and has certain overload protection effect, and the anti-torque strength of the drilling rod can also be improved and the safety of the drilling rod is guaranteed.

Description

Technical field [0001] The invention relates to a drill rod suitable for large-displacement drilling of small wells, and belongs to the technical field of petroleum drill rods. Background technique [0002] Drill pipes are used in the drilling of oil, natural gas, water sources and mineral deposits, which are connected by drill pipe joints. [0003] In recent years, the oilfield has developed a new technology to extend the life of old wells, which is to drill the side of the casing window in the middle and lower sections of the original well, so that the well position is horizontally shifted several hundred meters in the oil layer and placed in the horizontal oil layer. , Regenerate old wells and obtain high yields, while greatly saving the cost of re-drilling. [0004] However, conventional drill pipes are not very suitable for this type of small hole large-displacement drilling: one is that the conventional drill pipe is not strong enough to be used for this type of drilling; the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B17/042E21B17/00E21B17/10
CPCE21B17/00E21B17/0423E21B17/10E21B17/1042
Inventor 郑银良
Owner DP MASTER MFG
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