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Radial window cutting drilling device for downhole casing pipe of oil-water well

A drilling device and technology for oil and water wells, which are applied in the direction of drilling driving devices, wellbore/well components, drilling equipment, etc. in the wellbore, and can solve the problems affecting the efficiency and accuracy of radial drilling operations, casing and casing straightening Difficult segment milling, poor cementing quality and other problems, to achieve the effect of reducing labor intensity of workers, shortening drilling cycle and saving drilling cost

Pending Publication Date: 2020-02-21
SHENGLI OIL FIELD HIGHLAND GASOLINEEUM EQUIP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are two methods of window opening commonly used in oilfields: skewer window opening and section milling window opening. If the sidetracking formation is hard, the cementing quality is poor, the downhole situation of the old well is complicated, the well deviation angle is large, and the casing and Casing centralizer is not easy to segment milling, and when the optional range of window opening points is limited, generally the tilter window opening method is used, otherwise the segment milling window opening method is usually selected; Steering in the horizontal direction in the wellbore affects the operating efficiency and accuracy of radial drilling

Method used

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  • Radial window cutting drilling device for downhole casing pipe of oil-water well

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Embodiment Construction

[0022] The following is a further description of the present invention in conjunction with the accompanying drawings and embodiments.

[0023] refer to figure 1 As shown, the oil-water well downhole casing radial opening drilling device includes an up and down guiding and positioning unit, a rock formation drilling unit and a radial windowing unit.

[0024] Wherein, the up and down guiding and positioning unit includes slips 2 fixed to the inner wall of the casing 37, and the bottom of the slips 2 is fixed with an up and down positioning cylinder 3 and an up and down positioning cylinder piston 6 arranged in the up and down positioning cylinder 3.

[0025] The rock formation drilling unit includes a joint 36, and the piston rod of the up and down positioning cylinder piston 6 is connected with the top of the joint 36. The lower end of the joint 36 is fixedly connected with a rock formation casing assembly, the rock formation casing assembly includes a plurality of partitions ...

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Abstract

The invention discloses a radial window cutting drilling device for a downhole casing pipe of an oil-water well. The drilling device comprises an up-down guide positioning unit, a rock stratum drilling unit and a radial window cutting unit, wherein the up-down guide positioning unit comprises a slip and a guide device, the rock stratum drilling unit comprises a joint, a rock stratum shell assemblyand a rock stratum piston assembly, and the radial window cutting unit comprises a window cutting piston assembly, a transmission mechanism and a window cutting drill bit. According to the drilling device, the curvature radius is small, radial window cutting of the downhole casing pipe steering in the horizontal direction can be carried out, a window cutting hole can be followed, roundtrip operation is not needed, the rock stratum drill bit is used for continuing to perform radical drilling on the rock stratum, the operation adaptability is high, the reliability is high, the efficiency is high, and the energy is saved.

Description

technical field [0001] The invention relates to the technical field of petroleum drilling and production equipment, in particular to a radial window drilling device for an oil-water well downhole casing. Background technique [0002] At present, there are many techniques and methods for branch well drilling, including casing window drilling and milling sidetracking, preset window, open hole sidetracking, radial branch well method, expansion tube positioning measurement drilling and intelligent branch well, etc. The branch well has many advantages: improving the recovery rate, increasing the vertical opening degree of oil and gas layers, reducing drilling costs, reducing oil well management and environmental protection costs, and improving economic benefits. [0003] At present, there are two methods of window opening commonly used in oilfields: skewer window opening and section milling window opening. If the sidetracking formation is hard, the cementing quality is poor, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B29/06E21B4/02E21B21/00E21B23/00
CPCE21B29/06E21B4/02E21B21/00E21B23/00
Inventor 潜凌程鹏姜峰
Owner SHENGLI OIL FIELD HIGHLAND GASOLINEEUM EQUIP
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