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Casing bottom plugging device and method

A plugging device and casing technology, applied in earthwork drilling, sealing/isolation, wellbore/well parts, etc., can solve the production requirements of holes that are not suitable for the construction parameters of the buried depth of the ore body, the number of times of drilling, and the efficiency Low and other problems, to achieve the effect of shortening the laying time, simplifying the plugging process, and facilitating the laying work

Pending Publication Date: 2021-02-05
核工业二〇八大队
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AI Technical Summary

Problems solved by technology

[0008] In addition, the original plugging method has cumbersome procedures, many times of drilling and drilling, long time and low efficiency. It is no longer suitable for the production needs of holes with large buried depth and complex stratum structure.

Method used

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  • Casing bottom plugging device and method
  • Casing bottom plugging device and method
  • Casing bottom plugging device and method

Examples

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Embodiment Construction

[0035] see Figure 5-8 , a casing bottom plugging device, including a plug and a steel ball; the plug is an integrated structure, including a cylinder 1 and a truncated cone 2; the cylinder is arranged on the top of the plug, and the cone The platform is arranged at the lower part of the plug; the outer surface of the cylinder 1 is provided with a twist turnbuckle suitable for the sleeve, and a circular surface of the cylinder 1 is connected with a larger circular surface of the truncated cone 2. Connected by a common central axis, the cylinder 1 and the truncated cone 2 are both hollow structures, and the hollow structures are circular holes 3 whose diameter is smaller than that of steel balls.

[0036] A method for plugging the bottom of a casing, comprising the following steps: before placing the casing down, screwing the plug to the bottom of the casing in the form of a turnbuckle, and placing a steel ball on the hollow structure, the plug is connected to the bottom of the...

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Abstract

The invention particularly relates to a casing bottom plugging device. The casing bottom plugging device comprises a plug and a steel ball. The plug is of a hollow structure. A turnbuckle matched witha casing is arranged on the plug. Before the casing is placed downwards, the plug is connected with the bottom of the casing in a screwed mode in a turnbuckle mode, and the steel ball is placed on the hollow structure. In the process that the casing is arranged downwards, slurry jacks up the steel ball through the hollow structure of the plug to enter the casing; and when a steel casing is connected during stopping, the steel ball naturally falls down and seals an opening. According to a casing bottom plugging method, casing bottom plugging can be completed at a time, the situation of repeated plugging or poor plugging effect is avoided, the plugging procedure of parameter holes is simplified, the problem that a special bottom plate of a part of section is difficult to plug is solved, meanwhile, the site selection range during parameter hole design in the future is widened, the plugging quality of the casing is improved, and the production cost is also reduced.

Description

technical field [0001] The invention relates to the technical field of parameters and drilling and plugging equipment for ground leaching wells, in particular to a casing bottom plugging device and method. Background technique [0002] In the general survey and detailed investigation of in-situ leaching sandstone-type uranium deposits or in the subsequent in-situ leaching mining of uranium deposits, it is necessary to measure the radioactivity balance coefficient, conduct research on the law of balance failure, and make a report on the measurement results of γ-logging (or γ-sampling) Balance breaker fixes. The uranium-radium balance coefficient and the radium-radium balance coefficient are the main evaluation indicators. The uranium-radium balance coefficient can be obtained through sampling analysis, and the geophysical parameter hole is an important way to obtain the radium-radon balance coefficient. The key to accuracy. [0003] see figure 1 , the operating process of ...

Claims

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Application Information

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IPC IPC(8): E21B33/12
CPCE21B33/1208
Inventor 张青海陈霜程二磊王龙辉董刚健
Owner 核工业二〇八大队
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