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Drilling liner drilling assembly for drilling liner drilling

A liner and drilling technology, which is applied in the direction of drilling equipment, wellbore/well components, driving devices for drilling in the wellbore, etc., to achieve the effect of increasing the drilling speed

Pending Publication Date: 2021-07-16
中石化石油工程技术服务有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems faced by the existing liner drilling technology, the present invention proposes a liner drilling assembly for liner drilling. As the key core component of liner drilling, it can solve liner drilling and drilling tool recovery problem, the liner after the completion of the well can serve as a technical casing, and the drilling can continue after the complex formation is isolated

Method used

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  • Drilling liner drilling assembly for drilling liner drilling
  • Drilling liner drilling assembly for drilling liner drilling
  • Drilling liner drilling assembly for drilling liner drilling

Examples

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Effect test

Embodiment 1

[0031] A liner drilling assembly for liner drilling, comprising a reaming while drilling bit 1, an auxiliary reaming bit 2, a reaming drive mechanism 3, a motor 10, a drill pipe nipple 4, a liner 14, and a sealed bearing 5 , pressure transmission mechanism 9, pressurization mechanism 8; wherein:

[0032] The lower end of the drill pipe sub-section 4 is connected to the reaming-while-drilling bit 1 through a ball seat 16, the upper end of the drill pipe sub-section 4 is connected to the motor 10, and a spline shaft 6 is provided in the middle section of the drill pipe sub-section 4;

[0033] The lower end of the reaming driving mechanism 3 is connected with the auxiliary reaming bit 2, and the inner wall of the upper end is provided with a spline groove 7 for axial insertion and rotation cooperation with the spline shaft 6, and the reaming driving mechanism 3 is set in the upper tail pipe 14;

[0034] The sealing bearing 5 is arranged in the annular space between the reaming dr...

Embodiment 2

[0040] A liner drilling assembly for liner drilling based on the foregoing embodiment 1 further includes: a drill pipe 13 connected above the motor 10, an expansion cone 12 sleeved outside the drill pipe 13, and connected above the liner 14 The expansion casing 11, the expansion hanger 15 arranged on the expansion casing 11, and the hands-off mechanism 18 connected to the drill pipe 13.

[0041]The hands-off mechanism 18 is a hydraulic hand-off tool, which is located on the drill pipe 13 between the expansion cone 12 and the motor.

Embodiment 3

[0043] A liner drilling assembly for liner drilling based on the foregoing embodiment 1 further includes: a sealing plug 20 connected to the outside of the drill pipe 13, an expansion cone 12, a pressure transmission hole 19 arranged on the drill pipe 13, The expansion casing 11 connected with the tail pipe 14 is arranged on the expansion hanger 15 of the expansion casing 11 .

[0044] The pressure transmission hole 19 is located between the expansion cone 12 and the sealing plug 20 .

[0045] The expansion hanger 15 is a multi-segment sealing rubber material.

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Abstract

The invention discloses a drilling liner drilling assembly for drilling liner drilling. The assembly comprises a reaming-while-drilling drill bit, an auxiliary reaming drill bit, a reaming driving mechanism, a rotary sealing mechanism, a motor, a drilling liner and a drilling rod, the reaming driving mechanism is connected with the auxiliary reaming drill bit and the drilling liner, the reaming-while-drilling drill bit is connected with the drilling rod, and the rotary sealing mechanism is connected with the drilling rod. A rotary sealing mechanism is installed among the drill rod, the reaming driving mechanism and the bottom tail pipe, the motor drives the reaming-while-drilling drill bit to rotate through the drill rod, the rotary sealing mechanism drives the reaming driving mechanism to drive the auxiliary reaming drill bit to rotate, and continuous rotary sealing fit is formed between the tail pipe and the drill rod. According to the drilling reaming method, a drilling reaming mode combining the reaming bit while drilling and the auxiliary reaming bit is adopted, after drilling liner drilling, a drilling tool can be completely recycled, conditions are provided for follow-up drilling, and the problems of leakage and instability of a borehole are solved, so that underground accidents are reduced, the drilling safety is improved, and the drilling risk is reduced.

Description

technical field [0001] The invention relates to the field of drilling and completion tools in the oil and gas industry, in particular to a liner drilling assembly used for liner drilling, which can realize the liner drilling operation. Background technique [0002] The liner drilling technology refers to a method in which the drill pipe is connected to the liner drilling system after drilling to a certain depth with the conventional drilling technology, and after drilling, the well is cemented and the drill pipe is pulled out, leaving the liner downhole. Drilling technology is an emerging drilling technology at the international forefront. The paper "Liner Drilling Technology and Its Application" published in "Petroleum Drilling Technology" Volume 31, No. 2 in 2003 introduced the current situation and application of liner drilling technology abroad. [0003] Chinese patent 200810137580.3 discloses a liner drilling and completion process, the liner drilling and completion pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/20E21B10/26E21B23/01E21B4/04
CPCE21B7/20E21B10/26E21B23/01E21B4/04
Inventor 唐明吴柳根杨海波宁学涛蔡鹏张建国冯德杰侯婷滕照正沈学祥朱海波马建忠唐成磊
Owner 中石化石油工程技术服务有限公司