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A string structure for enhancing the horizontal extension capability of coiled tubing drilling

A horizontal extension and pipe string technology, which is applied in the direction of drilling equipment, drill pipe, casing, etc., can solve the problems of poor horizontal extension ability, spiral bending, and easy accumulation of cuttings, so as to reduce the deposition of cuttings and enhance the ability of horizontal extension Effect

Active Publication Date: 2019-04-02
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

It overcomes the shortcomings of the existing coiled tubing drilling, which is easy to produce spiral bending, easy to accumulate cuttings, and poor horizontal extension ability

Method used

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  • A string structure for enhancing the horizontal extension capability of coiled tubing drilling

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Embodiment Construction

[0009] like figure 1 As shown, a pipe string structure that enhances the horizontal extension capability of coiled tubing drilling includes a drill bit 1, a power drilling tool 2, a measurement-while-drilling assembly 3 and a coiled tubing 9. The upper end of the drill bit 1 is connected to the power drilling tool 2, and the upper end of the power drilling tool 2 is Connect the measurement while drilling component 3; the upper end of the measurement while drilling component 3 is connected to the WOB automatic control nipple 4, the WOB automatic control sub 4 communicates with the measurement while drilling component 3 and can automatically control the WOB, and keep it relatively constant to ensure that the drill bit 1 Drilling rapidly under suitable weight-on-bit conditions.

[0010] The upper end of the pressure-on-bit automatic control nipple 4 is connected to the downhole rotary power device 6. The downhole rotary power device 6 can generate a rotational torque similar to t...

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Abstract

The invention relates to the technical field of oil and gas exploitation well drilling and in particular relates to a tubular column structure enhancing coiled tubing drilling well horizontal extending capacity. The upper end of a measurement while drilling assembly of the device is connected with a bit pressure automatic control pup joint; the bit pressure automatic control pup joint communicateswith the measurement while drilling assembly and can automatically control bit pressure; the upper end of the bit pressure automatic control pup joint is connected with an underwell rotation powder device; the underwell rotation power device can produce a rotary torque driving a lower part tubular column to rotary drill; and the underwell rotation power device can receive a control instruction ofthe measurement while drilling assembly when orientation of the underwell rotation power device is required, and the torque output can be stopped. By the use of the tubular column structure, a high-rigid tubular column part of the coiled tubing drilling wellcan possess composite drilling capacity and self-traction driving capacity; a drill bit can be precisely controlled to acquire stable bit pressure; coiled tubing spiral bend effect can be reduced, horizontal section rock debris settlement can be lowered; damping and friction can be decreased; and horizontal extending capacity of the coiledtubing drilling well can be greatly improved.

Description

Technical field: [0001] The invention relates to the technical field of drilling for oil and gas development, in particular to a string structure for enhancing the horizontal extension capability of coiled tubing drilling. Background technique: [0002] In recent years, coiled tubing drilling technology has been used in sidetracking wells, sidetracking horizontal wells and drilling under underbalanced conditions. Since it can be lifted and lowered continuously without connecting a single piece of work, it has high drilling efficiency and well control safety, reducing the Labor intensity reduces drilling cost. Compared with conventional drilling technology, coiled tubing drilling has the following three aspects of particularity: 1. Except for directional section, conventional drilling adopts compound drilling or rotary drilling to obtain higher ROP. As for coiled tubing drilling, since coiled tubing cannot directly transmit rotational torque, the entire drilling process is s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B17/00E21B17/02E21B17/10E21B47/12
Inventor 邓旭刘乃震余雷喻晨朱忠伟王馨萍胡靖邓晓立李跃宋远飞匡緖兵罗军孙少亮尹方雷柳进余海波贺永杰陈志勇郭修成
Owner BC P INC CHINA NAT PETROLEUM CORP
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