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Well drilling method for fine silt clay layer

A technology of clay layer and fine silt, applied in drilling equipment and methods, earthwork drilling, drilling equipment and other directions, can solve the problems of poor drilling filtration effect, low drilling success rate, etc. small effect

Pending Publication Date: 2022-08-02
中煤矿业集团有限公司
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] The invention provides a fine silt clay layer drilling method, which aims to solve the problems of low drilling success rate and poor drilling filtering effect in the traditional technology

Method used

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  • Well drilling method for fine silt clay layer

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Embodiment Construction

[0031] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention. , not all examples. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] Combine below figure 1 The fine silt clay layer drilling method of the present invention is described.

[0033] see figure 1 , the present invention provides a fine silt clay layer drilling method, comprising:

[0034] S10. Measure the location of the target well, and obtain an electrical survey report and stratigraphic map of the location of the target well;

[0035] S20. Install a drilling platform acc...

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Abstract

The invention provides a fine silt clay layer drilling method which comprises the following steps: measuring a target motor-pumped well point location, and obtaining an electrical logging report and a stratigraphic map of the target motor-pumped well point location; installing a drilling platform according to the electrical logging report and the stratigraphic map; sampling in the drilling platform by using a sampler according to a preset rule; when it is determined that the sampling result is within a preset range, drilling is conducted on the drilling platform; after drilling to a preset depth, performing in-well electrical logging; determining the position of an aquifer boundary according to an in-well electrical logging result; determining a well casing mounting position according to the position of the aquifer boundary; installing the well casing in sections; after the well casing is installed, the well casing is filled with a filter material; after filling of the filter material is completed, the well casing is cleaned; and carrying out a water pumping test on the cleaned well casing. The invention provides a fine silt clay layer drilling method and aims to solve the problems of low drilling success rate and poor drilling filtering effect in the prior art.

Description

technical field [0001] The invention relates to the technical field of drilling, in particular to a drilling method for a fine silt clay layer. Background technique [0002] The rational use of drilling technology is directly related to the quality of the well. Although there are acceptance standards at present, there are some shortcomings in the operation of construction technology, and it is not comprehensive, extensive and practical. Different, the construction team needs to explore and research. In reality, after the completion of many water source wells, sand gushing occurs during the operation, and the sand content in the effluent exceeds 1 / 10,000 standard, and even further develops to plugging and scrapping; [0003] Improper selection of drilling process includes several aspects. The gradation of the gravel filter material is relatively simple. Either the particle size is too small and the fine particles block the filter pipe, or the particle size is too large to ca...

Claims

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Application Information

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IPC IPC(8): E21B7/00E02B17/00E21B47/04E21B43/04E21B49/08
CPCE21B7/00E21B49/02E21B47/04E21B43/04E21B49/087Y02A90/30
Inventor 沈圆郭若秋冯帆左明星
Owner 中煤矿业集团有限公司
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