Construction process of multi-branch underground screen pipe

A construction process and technology of lateral wells, which are applied in the directions of wellbore/well components, production fluids, earth-moving drilling, etc., can solve the problems of difficulty in realization, low production of multi-lateral horizontal wells, and increased production of multi-lateral horizontal wells, etc.

Inactive Publication Date: 2011-02-16
SHAANXI LONGMEN TIANDI COAL BED GAS TECH ENG
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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a multi-branch horizontal downhole screen construction process for the above-mentioned deficiencies in the prior art, which has reasonable design, simple operation, high construction efficiency, low input cost, good use effect, and effecti...

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  • Construction process of multi-branch underground screen pipe
  • Construction process of multi-branch underground screen pipe
  • Construction process of multi-branch underground screen pipe

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Embodiment Construction

[0074] like figure 2 As shown, the multi-branch horizontal well constructed in the present invention comprises a starting section 2, a whipping section 3 connected with the starting section 2, and a horizontal branch section connected with the whipping section 3 through a connecting section 4, the horizontal The branch section includes a horizontal main wellbore 7 connected to the connecting section 4 and a plurality of branch wellbores distributed on the horizontal main wellbore 7 at intervals from front to back. A branch point where the branch wellbores meet. like figure 1 The construction process of the multi-branch horizontal downhole screen includes the following steps:

[0075] Step 1. Preparatory work: Number the multiple branch wellbores sequentially from front to back, the numbers of the multiple branches are 1#, 2#, 3#...n#, n is the branch The number of boreholes, the number of branch points is n.

[0076]In this embodiment, the number of branch wellbores is 4,...

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Abstract

The invention discloses a construction process of a multi-branch underground screen pipe, which comprises the following steps of: 1, preparing; 2, drilling in advance; and 3, drilling and laying the screen pipe: drilling a first section of horizontal main shaft hole and a first section of branch well hole and laying the screen pipe, drilling the next section of horizontal main shaft hole and the next section of branch well hole and laying the screen pipe, repeating the operation until completing the drilling of a plurality of branch well holes and the laying the screen pipe, the drilling of the last section of horizontal main well hole and the laying of the screen pipe of the horizontal main well holes. The invention has the advantages of reasonable design, high construction efficiency, low investment input and good use effect, is convenient for operation, can effectively increase the yield of a multi-branch horizontal well, and effectively solves the defects of high investment cost, larger construction risk, complex construction step and difficult realization of the steps, low yield of the multi-branch horizontal well subjected to the construction, and the like in the traditional construction process of the multi-branch horizontal well.

Description

technical field [0001] The invention belongs to the technical field of multi-branch horizontal well construction, and in particular relates to a multi-branch horizontal downhole screen pipe construction process. Background technique [0002] At present, the following technical and technological problems still exist in the existing drilling procedures and completion methods of multilateral horizontal wells, which need to be solved urgently. [0003] First, due to the current domestic coal seam instability is very common, even within 20 days of drilling, there will be different degrees of falling off, falling blocks, or even collapse. Once the drilled wellbore is blocked, production will be very difficult However, the later drainage should last as long as possible. How to solve the contradiction between the two has always been the bottleneck restricting the development of the coalbed methane industry. [0004] Second, because the drilling procedure of existing multi-branch ho...

Claims

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Application Information

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IPC IPC(8): E21B43/08
Inventor 倪满友曹伟堂李景陈育通
Owner SHAANXI LONGMEN TIANDI COAL BED GAS TECH ENG
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