Energy-gathered binding type nidification leaking stoppage wall reinforcing device and application thereof in karst cave leaking stoppage

一种捆绑型、聚能的技术，应用在井眼/井部件、爆破、土方钻采等方向，能够解决堵漏材料不易驻留等问题，达到维持经济社会可持续发展、保障能源安全、提高堵漏成功率的效果

Active Publication Date: 2017-07-07
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] On the basis of analyzing downhole working conditions and various tools, the present invention provides a new type of downhole explosive plugging tool for karst cave leakage and its application—energy-gathering binding type nesting plugging and wall-solidifying device and its application in karst caves. The application in plugging solves the problem that plugging materials are not easy to stay and form bridges in conventional plugging methods, and can effectively improve the success rate of plugging in karst cave formations

Method used

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  • Energy-gathered binding type nidification leaking stoppage wall reinforcing device and application thereof in karst cave leaking stoppage
  • Energy-gathered binding type nidification leaking stoppage wall reinforcing device and application thereof in karst cave leaking stoppage
  • Energy-gathered binding type nidification leaking stoppage wall reinforcing device and application thereof in karst cave leaking stoppage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1 (single layer straight slit metal pipe)

[0038] The energy-gathering binding type nesting plugging and wall strengthening device includes an external slotted metal pipe 1 and an internal nesting blasting tool. The slotted metal pipe is a single-layer structure, and several straight slits 3 are cut on the pipe wall (such as image 3 shown). The nesting blasting tool is a mandrel 5 with some explosive grooves 4 on the surface, which is a helical groove (such as Figure 8 As shown), the explosives are placed in the groove, the slotted metal pipe is set on the mandrel and fixed, and the mandrel and the slotted metal pipe adopt a dynamic fit. The starting end of the straight seam is 30-200mm away from the top of the metal pipe, and the end of the straight seam is 30-200mm away from the end of the metal pipe.

[0039]The application of the energy-gathering binding type nesting plugging and wall strengthening device in the plugging of karst caves includes the f...

Embodiment 2

[0044] Embodiment 2 (single-layer spiral slotted metal pipe)

[0045] The energy-gathering bundled nesting plugging and wall fixing device includes an external slotted metal pipe 1 and an internal nesting blasting tool, and the wall of the slotted metal pipe is cut with a spiral seam 2 (such as figure 1 shown), the nesting blasting tool is a mandrel 5 with several explosive grooves 4 on the surface, and the grooves are straight grooves (such as Figure 7 As shown), the explosives are placed in the groove, the slotted metal pipe is set on the mandrel and fixed, and the mandrel and the slotted metal pipe adopt a dynamic fit. The starting end of the straight seam is 30-200mm away from the top of the metal pipe, and the end of the straight seam is 30-200mm away from the end of the metal pipe.

[0046] The application of the energy-gathering binding type nesting plugging and wall strengthening device in the plugging of karst caves includes the following steps:

[0047] 1) The ext...

Embodiment 3

[0051] Embodiment 3 (double layer straight slit metal pipe)

[0052] The energy-gathering binding type nesting plugging and wall fixing device includes an external slotted metal pipe and an internal nesting blasting tool. The nesting blasting tool is a mandrel 5 with several explosive grooves 4 on the surface, and the explosive grooves are spiral grooves. , explosives are placed in the tank. The slotted metal pipe is sheathed on the mandrel and fixed, and the mandrel and the slotted metal pipe adopt dynamic fit.

[0053] The slotted metal pipe is a double-layer structure, including an inner slotted metal pipe and an outer slotted metal pipe. The lengths of the inner and outer slotted metal pipes are equal, and their length is 400mm longer than the longitudinal length of the cave.

[0054] The outer diameter of the inner layer slotted metal pipe is equal to the inner diameter of the outer layer slotted metal pipe, and the outer diameter of the outer layer slotted metal pipe is...

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Abstract

The invention provides an energy-gathered binding type nidification leaking stoppage wall reinforcing device and application thereof in karst cave leaking stoppage and belongs to the technical field of down-hole construction. The device comprises an external slotted metal pipe and an internal nidification blasting tool, spiral seams or straight seams are formed in the pipe wall of the slotted metal pipe in a cut mode, the nidification blasting tool is a core shaft with the surface provided with a plurality of explosive grooves, explosives are placed in the explosive grooves, the slotted metal pipe is arranged on the core shaft in a sleeving mode and fixed, and the core shaft is movably matched with the slotted metal pipe. According to the energy-gathered binding type nidification leaking stoppage wall reinforcing device and the application thereof in karst cave leaking stoppage, the slotted metal pipe can form a bridge frame after explosion, the problem that a leaking stoppage material is not prone to residing to form the bridge frame in a regular leaking stoppage method is solved, and the leaking stoppage success rate of a karst cave stratum can be effectively improved.

Description

technical field [0001] The invention relates to an energy-gathering binding type nesting plugging and wall strengthening device and its application in karst cave plugging, which belongs to the technical field of underground construction. Background technique [0002] Lost circulation often occurs during the drilling and completion of oil and gas wells in carbonate rock formations. A slight loss will interrupt the drilling work, and a serious loss will delay a lot of production time and consume a lot of manpower and material resources. If the lost circulation is not dealt with in time, it will also cause well collapse, blowout and pipe sticking accidents, leading to the scrapping of some well sections or even the whole well. Severe blowout may cause personal casualties, so the timely treatment of lost circulation will restore normal drilling. is very important. At present, there are mature plugging techniques and technologies in China for permeable and fracture-type leakage,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/13F42D3/00
CPCE21B33/13F42D3/00E21B29/02
Inventor 张逸群樊继强陈安明文平罗淮东刘亚刘甘露
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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