Method apparatus and for hydraulic jet side drilling radial branching borehole

A technology of hydrojet and branch well, which is applied in the direction of drilling with liquid/gas jet, drilling equipment and method, drilling equipment, etc. It can solve the problems of low efficiency of window opening tools, slow rock breaking speed of drill bits, and high cement strength requirements. Achieve the effects of high-efficiency production increase recovery, avoid downhole accidents, and reduce labor intensity

Active Publication Date: 2009-05-13
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This new technology solves problems with traditional methods like cased hole drilling (CWD) where diverters are fixed only near certain depth points during drilling operations due to their large size. Additionally, it simplifies the process while reducing risk from downtime issues such as lifting heavy loads around an underground rigid support frame. Overall, this innovation makes better drainage holes more efficient than existing techniques without causing any negative side effect.

Problems solved by technology

This patented technical problem addressed in the patents relates to reducing the time required for completing multiple well bores without requiring expensive equipment such as ladders or jacks. Existing methods involve complex operations involving various steps like running bent risks and removing rocks afterwards, but these processes may also require specialized materials called splitters.

Method used

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  • Method apparatus and for hydraulic jet side drilling radial branching borehole
  • Method apparatus and for hydraulic jet side drilling radial branching borehole
  • Method apparatus and for hydraulic jet side drilling radial branching borehole

Examples

Experimental program
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Effect test

Embodiment approach 1

[0052] See Figure 4A , which is a flow chart of the first technical solution of the hydrojet sidetracking radially branched wellbore method of the present invention. The method for sidetracking the radially branched wellbore of the scheme in the present invention comprises the following steps:

[0053] (1) Put the first oil pipe 40 with the diverter 44 fixed at the end into the oil well casing 50, and drop it to a specified depth; wherein, the outer dimension of the diverter 44 is smaller than the inner diameter of the casing 50, by The through passage provided in the diverter 44 communicates with the top and side walls of the diverter; please refer to Figure 5 ;

[0054] (2) Fix the first oil pipe 40 and the casing 50 by the oil pipe anchor 41 arranged on the first oil pipe 40, so that the diverter 44 is fixed at the specified depth position;

[0055] (3) Put the second oil pipe (not shown in the figure) whose outer diameter is smaller than the inner diameter of the firs...

Embodiment approach 2

[0068] See Figure 4B , which is a flow chart of the second technical solution of the hydrojet sidetracking radially branched wellbore method of the present invention. The method for sidetracking the radially branched wellbore of the scheme in the present invention comprises the following steps:

[0069] (1) Put the first oil pipe 40 with the diverter 44 fixed at the end into the oil well casing 50, and drop it to a specified depth; wherein, the outer dimension of the diverter 44 is smaller than the inner diameter of the casing 50, by The through passage arranged in the diverter 44 communicates with the top and the side wall of the diverter;

[0070] (2) Fix the first oil pipe 40 and the casing 50 by the oil pipe anchor 41 arranged on the first oil pipe 40, so that the diverter 44 is fixed at the specified depth position;

[0071] (3) Put the second oil pipe whose outer diameter is smaller than the inner diameter of the first oil pipe 40 into the first oil pipe, and a formatio...

Embodiment approach 3

[0082] See Figure 4C , which is a flow chart of the third technical solution of the hydrojet sidetracking radially branched wellbore method of the present invention. The method for sidetracking the radially branched wellbore of the scheme in the present invention comprises the following steps:

[0083] (1) Put the first oil pipe 40 with the diverter 44 fixed at the end into the oil well casing 50, and drop it to a specified depth; wherein, the outer dimension of the diverter is less than or equal to the inner diameter of the casing, by setting The through channel in the diverter 44 communicates with the top and side walls of the diverter;

[0084] (2) Fix the first oil pipe 40 and the casing 50 by the oil pipe anchor 41 arranged on the first oil pipe 40, so that the diverter 44 is fixed at the specified depth position;

[0085] (3) Put the second oil pipe 61 whose outer diameter is smaller than the inner diameter of the first oil pipe 40 into the first oil pipe, and connect...

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Abstract

The invention relates to a method for the sidetrack drilling of radial branch well bores through hydraulic jet and a device thereof. The device comprises a first oil pipe and a second oil pipe, wherein the external diameter of the first oil pipe is smaller than the internal diameter of a sleeve arranged inside an oil well; and the end part of the first oil pipe is connected with a deflector. The external diameter of the second oil pipe is smaller than the internal diameter of the first oil pipe; and the second oil pipe is connected with a sidetrack drilling tool carrying out the sidetrack drilling of the radial branch well bores. The external dimensions of the deflector are smaller than the internal diameter of the sleeve; the deflector has a through passage communicated with the top and the side wall; and the sidetrack drilling tool is deflected to the side wall from the top of the deflector via the through passage. The device overcomes well-known defects, can correctly and conveniently fix the deflector at a set stratum position and have a correct drilling position. The device is particularly suitable for the sidetrack drilling of a well with an ultra short radius, can operate conveniently on a ocean platform, thereby avoiding the downhole accidents caused by a downhole tool, effectively shortening the drilling cycle, saving the drilling cost, reducing the labor intensity ofworkers, improving the construction effects and having great market potential.

Description

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Claims

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Application Information

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Owner CHINA UNIV OF PETROLEUM (BEIJING)
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