CN-121994691-A - Explosion shaping ground test method and related test device

CN121994691ACN 121994691 ACN121994691 ACN 121994691ACN-121994691-A

Abstract

The invention discloses a method for explosion shaping ground test and a related test device. The method comprises the steps of pressing the selected explosive for explosion shaping into a plurality of cylindrical explosive columns with central holes, utilizing a cartridge filled with quantitative explosive columns to be placed in a first test sleeve subjected to pre-deformation treatment in the site of explosion shaping ground test, detonating the explosive in the cartridge to perform a non-confining pressure explosion shaping ground test and/or a confining pressure explosion shaping ground test, determining whether the formula and the explosive quantity of the explosive are required to be adjusted according to the non-confining pressure/confining pressure explosion shaping ground test and the measurement result of deformation positions, and adjusting and continuing the next test when the formula and the explosive quantity are required to be adjusted until a preset test result is obtained. The invention has wide application range, provides reasonable guidance for optimizing and perfecting the explosion shaping technology, lays a foundation for field test and popularization and application, and realizes reliable repair of damaged sleeves with different sizes and materials.

Inventors

HE CHANJUAN
XU TAO
HU JING
XU GANG
HAN LONG
SHI LIANHAI
YANG FAN
Bu Wenyang
WANG XIAOJUN
YIN FANGLEI
DAI YUNCAI
LIU PINGQUAN

Assignees

中国石油天然气集团有限公司
中国石油集团长城钻探工程有限公司

Dates

Publication Date: 20260508
Application Date: 20241108

Claims (13)

1. A method of explosion-shaping a ground test, comprising: pressing the selected explosive for explosion shaping into a plurality of cylindrical explosive columns with central holes; In the field of explosion shaping ground test, the explosive in the explosive cartridge is detonated to make no-confining pressure explosion shaping ground test, and according to the measuring result of no-confining pressure explosion shaping ground test on deformation position, it is determined whether the formula and dosage of explosive are required to be regulated, and when the regulation is required, the next test is continued until the preset test result is obtained, and/or In the field of explosion shaping ground test, a cartridge containing quantitative explosive column is used and placed in a first test sleeve which is subjected to deformation treatment in advance, the first test sleeve is placed in a second test sleeve, simulated stratum materials are poured between the first test sleeve and the second test sleeve, explosive in the cartridge is detonated, the explosion shaping ground test with confining pressure is performed, whether the formula and the explosive quantity of the explosive are required to be adjusted or not is determined according to the measurement result of the explosion shaping ground test with confining pressure on the deformation position, and the next test is adjusted and continued when the formula and the explosive quantity are required to be adjusted until a preset test result is obtained.
2. The method of claim 1, wherein the non-confining pressure blast-shaping ground test is performed by detonating an explosive in a cartridge that is placed in a pre-deformed first test sleeve with a cartridge containing a quantity of explosive, and comprising: According to the deformation position of the first test sleeve pipe which is subjected to deformation treatment in advance, the explosive loading pipe with the explosive detonating cord is placed at the position corresponding to the deformation position of the first test sleeve pipe, the explosive detonating cord extends out of the first test sleeve pipe and is connected with an exploder, clear water is filled between the explosive loading pipe and the first test sleeve pipe, the water surface height is lower than the explosive loading pipe, and the exploder explodes the explosive in the explosive loading pipe.
3. The method of claim 1, wherein the confined pressure blast-shaping surface test is performed using a cartridge containing a quantity of grain, placing the cartridge in a first test sleeve that has been deformed in advance, placing the first test sleeve in a second test sleeve, and casting simulated formation material between the first test sleeve and the second test sleeve, detonating the explosive in the cartridge, and comprising: According to the deformed position on the first test sleeve pipe which is subjected to deformation treatment in advance, placing the explosive fuse-filled explosive fuse at a position corresponding to the deformed position of the first test sleeve pipe, wherein the explosive fuse extends out of the first test sleeve pipe and is connected with an exploder, clean water is filled between the explosive fuse-filled fuse and the first test sleeve pipe, and the water surface height is lower than the explosive fuse-filled explosive fuse; installing a second test sleeve on the ground, centering and fixing the first test sleeve with the cartridge in the center of the second test sleeve; Filling concrete into the annular spaces of the first test sleeve and the second test sleeve, pouring the concrete to be flush with the upper end surface of the second test sleeve, and curing after the concrete is poured and molded; The explosive in the cartridge is detonated by an initiator.
4. The method of any of claims 1-3, wherein the explosive for explosion shaping is a mixture comprising cyclotetramethylene tetranitramine, aluminum powder, microcrystalline wax and polywax, wherein the cyclotetramethylene tetranitramine is an explosive body, the aluminum powder is a high heat agent, and the microcrystalline wax and the polywax are composite insensitive agents.
5. A method according to any one of claims 1 to 3, wherein the explosive for truing is pre-selected by: After determining the components of the explosive, performing at least one or more of a detonation velocity test, an impact sensitivity test, a friction sensitivity test and a temperature resistance test on the explosive; If the test results are all qualified, determining that the components of the explosive are qualified, otherwise, carrying out optimization and preparation of the components of the explosive again until the test is all qualified.
6. A method according to any one of claims 1 to 3, wherein the deformation treatment on the first test sleeve comprises pressing the first test sleeve by mechanical pressing to a predetermined deformation.
7. A method according to claim 2 or claim 3, wherein selecting a metered dose of the cartridge comprises: and loading the explosive column with the length which is more than 1.5 times of the deformation length of the first test sleeve into the loading cylinder.
8. A confining pressure-free explosion shaping ground test device, which is suitable for the confining pressure-free explosion shaping ground test step in the explosion shaping ground test method according to any one of claims 1 to 7, and comprises a first test sleeve which is subjected to deformation treatment in advance, a loading tube which is provided with quantitative explosive columns, a detonating cord, an exploder, a sleeve upper end cover, a sleeve lower end cover, a loading tube upper end cover and a loading tube lower end cover; the two ends of the first test sleeve are respectively in threaded connection with the sleeve upper end cover and the sleeve lower end cover; the two ends of the cartridge are respectively connected with an upper cartridge end cover and a lower cartridge end cover, and the upper cartridge end cover is provided with a hole; The detonating cord is inserted into the center hole of the explosive column, and one end of the detonating cord sequentially extends out of a first test sleeve through holes in the upper end cover of the explosive loading tube and the upper end cover of the sleeve and is connected with the exploder; and the annulus between the first test sleeve and the loading tube is filled with clear water.
9. The device of claim 8, wherein the cartridge wall is scored with continuous diamond-shaped or square grooves.
10. The apparatus of claim 8 wherein the water level in the annulus between the first test cannula and the cartridge is lower than the cartridge in the first test cannula.
11. The apparatus of claim 8, wherein the length of the cartridge is greater than or equal to 1.5 times the deformed length of the first test cannula.
12. A confining pressure explosion shaping ground test device, which is suitable for the confining pressure explosion shaping ground test steps in the explosion shaping ground test method according to any one of claims 1-7, and comprises a second test sleeve, a first test sleeve which is subjected to deformation treatment in advance, a cartridge containing quantitative explosive grains, a detonating cord, an exploder, a sleeve upper end cover, a sleeve lower end cover, a cartridge upper end cover and a cartridge lower end cover; The first test sleeve is arranged in the second test sleeve, and the upper end of the first test sleeve is higher than the second test sleeve; Threads are arranged at two ends of the first test sleeve and are respectively in threaded connection with an upper sleeve end cover and a lower sleeve end cover; the two ends of the cartridge are respectively connected with an upper cartridge end cover and a lower cartridge end cover, and the upper cartridge end cover is provided with a hole; The detonating cord is inserted into the center hole of the explosive column, and one end of the detonating cord extends out of a first test sleeve to be connected with the exploder through holes in the upper end cover of the explosive loading tube and the upper end cover of the sleeve in sequence; and the annulus between the first test sleeve and the loading tube is filled with clear water.
13. The apparatus of claim 12, wherein the simulated formation material is concrete and the height of the concrete is flush with the upper end surface of the second test sleeve.

Description

Explosion shaping ground test method and related test device Technical Field The invention relates to the technical field of petroleum and natural gas well workover, in particular to a method for explosion shaping ground test and a related test device. Background With the gradual exploitation of oil fields, the deformation and damage conditions of the casing are gradually increased due to the influences of geological factors, engineering factors and the like, the petroleum yield and quality are directly influenced, and the shaping and repairing of the casing become an important well repairing operation of the oil fields. The traditional sleeve shaping and repairing method includes the first mechanical expanding and shaping method, that is, the mechanical force is applied to the sleeve wall by a shaper to extrude the inner diameter of the deformed part so as to achieve the purpose of repairing, the second milling and shaping method, that is, the deformed and protruded part is ground by a grinding shoe and then filled with cement slurry for sealing, and the third explosion shaping method, based on the principle of the metal explosion shaping technology, a certain amount of explosive which is required is placed in a special explosion barrel, is detonated after being placed at the deformed position of the sleeve, and the deformed part of the sleeve is outwards inflated by the energy generated by explosion of the explosive so as to recover the deformation of the sleeve. Compared with the former two methods, the explosion shaping method has the advantages of strong repairing capability, short construction period, low cost, low labor intensity and the like. The explosion shaping technology proposed in the prior art has a narrow application range, such as being only applied to shaping and repairing thin-wall casings and vertical/inclined wells, but the explosion shaping and repairing technology of thick-wall casings and vertical/inclined/horizontal wells is not involved, in addition, the casings with different sizes and materials have different requirements on explosion shaping tools, the explosion shaping force is too small to shape in place, the shaping force is too large to cause casing damage and even collapse, and therefore, the method needs a test method with wide application range, reasonable reliability to detect and adjust pertinently. Disclosure of Invention The present invention has been made in view of the above problems, and it is an object of the present invention to provide a method and related test apparatus for an explosion-proof floor test that overcomes or at least partially solves the above problems. In a first aspect, an embodiment of the present invention provides a method for performing an explosion-shaping ground test, including: pressing the selected explosive for explosion shaping into a plurality of cylindrical explosive columns with central holes; In the field of explosion shaping ground test, the explosive in the explosive cartridge is detonated to make no-confining pressure explosion shaping ground test, and according to the measuring result of no-confining pressure explosion shaping ground test on deformation position, it is determined whether the formula and dosage of explosive are required to be regulated, and when the regulation is required, the next test is continued until the preset test result is obtained, and/or In the field of explosion shaping ground test, a cartridge containing quantitative explosive column is used and placed in a first test sleeve which is subjected to deformation treatment in advance, the first test sleeve is placed in a second test sleeve, simulated stratum materials are poured between the first test sleeve and the second test sleeve, explosive in the cartridge is detonated, the explosion shaping ground test with confining pressure is performed, whether the formula and the explosive quantity of the explosive are required to be adjusted or not is determined according to the measurement result of the explosion shaping ground test with confining pressure on the deformation position, and the next test is adjusted and continued when the formula and the explosive quantity are required to be adjusted until a preset test result is obtained. In one embodiment, the explosive in the cartridge is detonated by using the cartridge with quantitative explosive column, and the explosive cartridge is placed in a first test sleeve which is deformed in advance, and the non-confining pressure explosion shaping ground test is carried out, and specifically comprises the following steps: According to the deformation position of the first test sleeve pipe which is subjected to deformation treatment in advance, the explosive loading pipe with the explosive detonating cord is placed at the position corresponding to the deformation position of the first test sleeve pipe, the explosive detonating cord extends out of the first test sleeve pipe and is connected with an exploder, clear