CN112211600A - Radial confining pressure loading anti-impact structure of perforation target - Google Patents
Radial confining pressure loading anti-impact structure of perforation target Download PDFInfo
- Publication number
- CN112211600A CN112211600A CN202010965634.6A CN202010965634A CN112211600A CN 112211600 A CN112211600 A CN 112211600A CN 202010965634 A CN202010965634 A CN 202010965634A CN 112211600 A CN112211600 A CN 112211600A
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- Prior art keywords
- perforation
- target body
- target
- shaft
- impact
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- 238000007789 sealing Methods 0.000 claims abstract description 28
- 238000004088 simulation Methods 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 4
- 238000004880 explosion Methods 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 claims description 3
- 230000035939 shock Effects 0.000 claims 1
- 238000002474 experimental method Methods 0.000 abstract description 7
- 241001391944 Commicarpus scandens Species 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 13
- 239000011148 porous material Substances 0.000 description 8
- 239000012530 fluid Substances 0.000 description 5
- 238000007599 discharging Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/11—Perforators; Permeators
- E21B43/116—Gun or shaped-charge perforators
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/11—Perforators; Permeators
- E21B43/119—Details, e.g. for locating perforating place or direction
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to the field of oil field logging, and belongs to a radial confining pressure loading anti-impact structure of a perforating target. The invention is designed for solving the problem that the rubber sleeve is easy to break when perforating under the confining pressure condition to cause the failure of the experiment, and the invention comprises the following components: comprises a simulated shaft (1), a target body (2) and an outer sleeve component (3); the simulated shaft (1) is used for providing uniform axial pressure for the end face of the target body (2) and axially perforating the target body (2); the target body (2) is used for bearing perforation impact; the outer sleeve component (3) comprises a hollow rubber sleeve (4), an auxiliary sealing sleeve (5) and a support ring (6); the invention has the advantages of low cost, high reliability, convenient use and the like.
Description
Technical Field
The invention relates to the field of oil field logging, and belongs to a radial confining pressure loading anti-impact structure of a perforating target.
Background
At present, a perforating device simulation perforating test device used in an oil field is mainly based on GB/T20488-: in the tests carried out by the 'recommended practice for evaluating perforating tool for oil and gas well' of the second edition 2006, the perforating test device which utilizes the rubber sleeve to load confining pressure so as to establish the loading confining pressure and pore pressure for the target body and the loading well pressure for the perforating tool is introduced, and the principles of the used test devices are basically the same in domestic researches such as perforating bullet stratum penetration depth test researches and the like. The disadvantages of the above-mentioned device are: the rubber sleeve is extruded on the end heads at two ends by using the fixer to seal the sandstone target, and confining pressure is applied around the rubber sleeve, so that perforation impact is easy to leak out along the sandstone end face to impact the rubber sleeve, and the phenomena of perforation, fixer sealing failure and the like are caused, and the experiment failure is caused. The invention discloses a repeated perforation experiment process and a repeated perforation experiment device for a shaft-target combination device (ZL 201510716248.2) and (CN 105350946A) for a perforation flow experiment, which also introduce that a fixer is used for extruding a rubber sleeve on end heads at two ends to seal a sandstone target, and the phenomena of perforation, sealing failure of the fixer and the like caused by the fact that perforation impact leaks out of the impact rubber sleeve along the sandstone end face exist, so that the success rate of the experiment is reduced.
The invention injects fluid into the cavity in the rubber sleeve to pressurize an annular object, when perforation impact is discharged from the impact rubber sleeve along the sandstone end face, the rubber sleeve can be pushed open to be discharged along the side face of the simulated shaft, when the impact pressure is reduced, the rubber sleeve clamps the simulated shaft, and the support ring protects the rubber sleeve in real time, thereby achieving the dual purposes of pressure maintaining and rubber sleeve protection, and successfully completing perforation and test.
Disclosure of Invention
The invention aims to provide a radial confining pressure loading impact-proof structure of a perforating target, which is low in cost and can ensure that perforating and testing can be completed in the whole pressure simulation process.
The invention is realized by the following technical scheme: radial confining pressure loading of perforating target
The anti-impact structure comprises a simulation shaft, a target body and an outer sleeve component;
the simulated shaft is used for providing uniform axial pressure for the end face of the target body and axially perforating the target body;
the target body is used for bearing perforation impact;
the outer sleeve component comprises a hollow rubber sleeve, an auxiliary sealing sleeve and a support ring;
the auxiliary sealing sleeve is arranged at the perforation end of the target body and is in butt joint with the simulation shaft, and the support ring is sleeved on the simulation shaft, the auxiliary sealing sleeve and the target body.
The auxiliary sealing sleeve is sleeved on the end of the target body and is inserted into the supporting ring after uniformly contacting with the shaft, and then is inserted outside the hollow rubber sleeve, so that the auxiliary sealing sleeve prevents liquid at the contact space of the target body, the shaft and the supporting ring from seeping out to flow into an eyelet formed after the shaft is perforated, and the measurement precision of the seepage liquid of a perforation hole channel in the sandstone target is influenced;
the support ring keeps the target body and the shaft accurately positioned and prevents explosion impact from damaging the hollow rubber sleeve during perforation; the hollow rubber sleeve provides binding pressure for the shaft and the target body, and the target body is prevented from producing cracks during perforation.
The inner wall of the support ring can be additionally provided with a sealing layer to replace an auxiliary sealing sleeve to realize the sealing function.
The support ring may be eliminated.
Compared with the prior art, the invention has the following advantages:
the invention adopts the technical scheme that fluid is injected into the cavity in the rubber sleeve to pressurize an annular object, the rubber sleeve can be pushed open to discharge along the side surface of the simulated shaft when the perforation impact discharges the impact rubber sleeve along the sandstone end surface, and the rubber sleeve clamps the simulated shaft when the impact pressure is reduced, so that the dual purposes of pressure maintaining and rubber sleeve protection are achieved, and multiple times of perforation and test in the same perforation hole are obtained. Has the advantages of convenient structure and operation, good reliability and the like.
Description of the drawings: FIG. 1 is a schematic structural view of the present invention; fig. 2 is an overall installation view of the non-perforated end 6 of the present invention after installation of the assembled device.
In the figure: 1-simulated wellbore, 2-target body, 3-outer sleeve component, 4-hollow rubber sleeve, 5-auxiliary sealing sleeve, 6-support ring, 7-non-perforation end, 8-pore pressure pressurization pipe, 9-shell, 10-confining pressure pressurization pipe and 11-well pressure pressurization pipe.
The specific implementation mode is as follows: the invention is further detailed in the following with reference to the attached drawings, a perforation
The target radial confining pressure loading anti-impact structure comprises a simulation shaft 1, a target body 2 and an outer sleeve component 3;
the simulated shaft 1 is used for providing uniform axial pressure for the end face of the target body 2 and axially perforating the target body 2;
the target body 2 is used for bearing perforation impact;
the outer sleeve component 3 comprises a hollow rubber sleeve 4, an auxiliary sealing sleeve 5 and a support ring 6;
the auxiliary sealing sleeve 5 is arranged at the perforation end of the target body 2 and is in butt joint with the simulation shaft 1, and the support ring 6 is sleeved on the simulation shaft 1, the auxiliary sealing sleeve 5 and the target body 2.
The auxiliary sealing sleeve 5 is sleeved on the end of the target body 2 and is inserted into the support ring 6 after being in uniform contact with the shaft 1, and then is inserted outside the hollow rubber sleeve 4, and the auxiliary sealing sleeve 5 prevents liquid at the contact space of the target body 2, the shaft 1 and the support ring 6 from seeping into holes formed after the shaft 1 is perforated, so that the measurement precision of the seepage liquid of the perforation hole channel in the sandstone target is influenced;
the support ring 6 keeps the target body 2 and the shaft 1 accurately positioned and prevents explosion impact from damaging the hollow rubber sleeve 4 during perforation; the hollow rubber sleeve 4 provides binding pressure for the shaft 1 and the target body 2, and prevents the target body 2 from producing cracks during perforation.
The inner wall of the support ring 6 can be additionally provided with a sealing layer to replace an auxiliary sealing sleeve 5 to realize the sealing function.
The support ring 6 may be removed.
When the device is used on site:
a. first, perforation and flow tests were performed. The device is connected, a well pressure pressurization pipe 10 pressurizes a simulation shaft, a confining pressure is added to a sandstone target by injecting fluid into a hollow rubber sleeve 3 through a confining pressure pressurization pipe 9, pore pressure is applied to the sandstone target by utilizing a pore pressure pressurization pipe 7, when the well pressure, the confining pressure and the pore pressure reach set pressure values, the energy-gathering perforator is detonated through a detonating line, a pressurization, pressure stabilization and measurement system buffer protection pipeline and the like connected by the well pressure pressurization pipe 10, the confining pressure pressurization pipe 9 and the pore pressure pressurization pipe 7 realize the purposes of discharging an impact pressure protection rubber sleeve and clamping the sandstone target through a connection structure of the rubber sleeve 3 and the simulation shaft 1. The flow of the sandstone target perforator is realized by pressurizing by the pore pressure pressurizing pipe 7 and decompressing and refluxing by the well pressure pressurizing pipe 10, and parameters such as temperature, pressure, flow and the like are measured by a corresponding test system
b. And secondly, measuring the perforation depth and the perforation aperture after perforation. After the flow test is finished, reversely discharging fluid from the well pressure pressurization pipe 10 and the pore pressure pressurization pipe 7, reducing the pressure in the simulated shaft 1 and the sandstone target to zero, sequentially unloading the well pressure pressurization pipe 10, the upper end cover, the energy-gathering perforator and the positioner, and measuring the perforation depth and the perforation aperture of the sandstone target;
c. the perforation and flow tests were then repeated at the same hole. And (3) replacing the locator, if the locator is not damaged or replaced, putting the installed energy-collecting perforator, the detonating cord, the upper end cover and the well pressure pressurization pipe 10 into a well pressure simulation and perforation system, repeating the step a to carry out same-hole perforation and test, repeating the step b to measure the perforation depth and the perforation aperture of the sandstone target after repeated perforation, repeating the steps a and b each time the same-hole perforation is carried out, replacing the new energy-collecting perforator, repeating the steps a and b until the same-hole perforation experiment is completed, and measuring the pressure difference at two ends of the sandstone target, the flow rate of fluid passing through a perforation channel, the temperature, the perforation depth and the perforation aperture.
Claims (5)
1. The utility model provides a perforation target radial confined pressure loading protecting against shock structure which characterized in that: comprises a simulated shaft (1), a target body (2) and an outer sleeve component (3);
the simulated shaft (1) is used for providing uniform axial pressure for the end face of the target body (2) and axially perforating the target body (2);
the target body (2) is used for bearing perforation impact;
the outer sleeve component (3) comprises a hollow rubber sleeve (4), an auxiliary sealing sleeve (5) and a support ring (6);
the auxiliary sealing sleeve (5) is arranged at the perforation end of the target body (2) and is in butt joint with the simulation shaft (1), and the support ring (6) is sleeved on the simulation shaft (1), the auxiliary sealing sleeve (5) and the target body (2).
2. The perforation target radial confining pressure loading impact-proof structure as claimed in claim 1, wherein: the auxiliary sealing sleeve (5) is sleeved on the end of the target body (2) and is inserted into the supporting ring (6) after being uniformly contacted with the shaft (1), and then is inserted into the hollow rubber sleeve (4), and the auxiliary sealing sleeve (5) prevents liquid seepage at the contact space of the target body (2), the shaft (1) and the supporting ring (6) from flowing into a hole formed after the shaft (1) is perforated, so that the measurement precision of the seepage liquid of a perforation hole channel in the sandstone target is influenced.
3. The perforation target radial confining pressure loading impact-proof structure as claimed in claim 1, wherein: the support ring (6) keeps the target body (2) and the shaft (1) accurately positioned and prevents explosion impact from damaging the hollow rubber sleeve (4) during perforation; the hollow rubber sleeve (4) provides binding pressure for the shaft (1) and the target body (2) and prevents the target body (2) from producing cracks during perforation.
4. The perforation target radial confining pressure loading impact-proof structure as claimed in claim 1, wherein: the inner wall of the support ring (6) can be additionally provided with a sealing layer to replace an auxiliary sealing sleeve (5) to realize the sealing function.
5. The perforation target radial confining pressure loading impact-proof structure as claimed in claim 1, wherein: the support ring (6) can be removed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010965634.6A CN112211600A (en) | 2020-09-15 | 2020-09-15 | Radial confining pressure loading anti-impact structure of perforation target |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010965634.6A CN112211600A (en) | 2020-09-15 | 2020-09-15 | Radial confining pressure loading anti-impact structure of perforation target |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112211600A true CN112211600A (en) | 2021-01-12 |
Family
ID=74048888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010965634.6A Pending CN112211600A (en) | 2020-09-15 | 2020-09-15 | Radial confining pressure loading anti-impact structure of perforation target |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112211600A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200946503Y (en) * | 2006-07-12 | 2007-09-12 | 中国石化集团胜利石油管理局测井公司 | Experimental perforating target for emulating downhole perforating condition |
| CN107905768A (en) * | 2017-12-01 | 2018-04-13 | 中国石油天然气股份有限公司 | Same-hole repeated perforation experiment process and device |
| CN108489341A (en) * | 2018-05-23 | 2018-09-04 | 中海石油（中国）有限公司天津分公司 | A kind of target of simulation reservoir confining pressure effect |
| US20180340417A1 (en) * | 2017-05-26 | 2018-11-29 | Big Guns Energy Services Inc. | System and method for triaxial testing of core samples at high temperatures |
| CN111472743A (en) * | 2020-04-14 | 2020-07-31 | 西安闪光能源科技有限公司 | Composite energy-containing rod for generating controllable shock waves and manufacturing method thereof |
-
2020
- 2020-09-15 CN CN202010965634.6A patent/CN112211600A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200946503Y (en) * | 2006-07-12 | 2007-09-12 | 中国石化集团胜利石油管理局测井公司 | Experimental perforating target for emulating downhole perforating condition |
| US20180340417A1 (en) * | 2017-05-26 | 2018-11-29 | Big Guns Energy Services Inc. | System and method for triaxial testing of core samples at high temperatures |
| CN107905768A (en) * | 2017-12-01 | 2018-04-13 | 中国石油天然气股份有限公司 | Same-hole repeated perforation experiment process and device |
| CN108489341A (en) * | 2018-05-23 | 2018-09-04 | 中海石油（中国）有限公司天津分公司 | A kind of target of simulation reservoir confining pressure effect |
| CN111472743A (en) * | 2020-04-14 | 2020-07-31 | 西安闪光能源科技有限公司 | Composite energy-containing rod for generating controllable shock waves and manufacturing method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 唐凯等: "油气井射孔模拟装置的研制与应用", 《石油机械》 * |
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Application publication date: 20210112 |