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Drilling rod applicable to small-well-hole and large-displacement well drilling

A large displacement, drill pipe technology, applied in drill pipe, drilling equipment, drill pipe, etc., can solve the problems of low strength of drill pipe, unusable drilling, and not suitable for drilling, so as to simplify the oil drilling process and improve the drilling efficiency. Oil efficiency and improved torsional strength

Active Publication Date: 2016-10-12
DP MASTER MFG
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  • 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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  • Drilling rod applicable to small-well-hole and large-displacement well drilling
  • Drilling rod applicable to small-well-hole and large-displacement well drilling
  • Drilling rod applicable to small-well-hole and large-displacement well drilling

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Embodiment Construction

[0014] see Figure 1 to Figure 3 , the present invention relates to a drill pipe suitable for extended-displacement drilling in slimholes, including 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 male joints 1.2 and female joints 1.3 at both ends, wherein the oil pipe 2 is placed inside the drill pipe 1, wherein a plurality of spring centralizers 3 are sheathed outside the middle section of the oil pipe 2, and the spring centralizers 3 are used to position the oil pipe 2 and clamp the inner wall of the main rod 1.1 to prevent the oil pipe 2 from Shaking, the oil pipe 2 is provided with block centralizers 4 near both ends, and the block centralizers 4 are also used to position the oil pipe 2, and block the inner wall of the male joint 1.2 and the female joint 1.3 to prevent the oil pipe from 2 shaking, when two oil drill pipes are connected, the drill pipe 1 is threadedly connected and matched by the male joint 1.2 and the fem...

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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 pipe suitable for long-displacement drilling in slim holes, and belongs to the technical field of petroleum drill pipes. Background technique [0002] During the drilling of oil, natural gas, water sources and mineral deposits, drill pipes are used, and the drill pipes are connected by drill pipe joints. [0003] In recent years, the oil field has developed a new technology to prolong the life of old wells, which is to drill sideways on the casing in the middle and lower sections of the original well, so that the well position is displaced horizontally by hundreds of meters in the oil layer, and placed in the horizontal oil layer. , regenerate old wells, and achieve high yields, while greatly saving the cost of re-drilling. [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 can...

Claims

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Application Information

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Patent Type & Authority Applications(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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