CN113310830B - Device and method for testing damage condition of outer surface of packer rubber cylinder - Google Patents
Device and method for testing damage condition of outer surface of packer rubber cylinder Download PDFInfo
- Publication number
- CN113310830B CN113310830B CN202010119735.1A CN202010119735A CN113310830B CN 113310830 B CN113310830 B CN 113310830B CN 202010119735 A CN202010119735 A CN 202010119735A CN 113310830 B CN113310830 B CN 113310830B
- Authority
- CN
- China
- Prior art keywords
- packer
- fluid
- testing
- end cover
- oil pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 218
- 229920001971 elastomer Polymers 0.000 title claims abstract description 87
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000012530 fluid Substances 0.000 claims abstract description 186
- 210000002445 nipple Anatomy 0.000 claims abstract description 100
- 238000007789 sealing Methods 0.000 claims description 15
- 238000004088 simulation Methods 0.000 claims description 14
- 238000006073 displacement reaction Methods 0.000 claims description 13
- 238000012856 packing Methods 0.000 claims description 5
- 238000010998 test method Methods 0.000 claims description 2
- 230000008569 process Effects 0.000 description 9
- 239000007788 liquid Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 230000003628 erosive effect Effects 0.000 description 6
- 238000002637 fluid replacement therapy Methods 0.000 description 5
- 230000007774 longterm Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 239000002002 slurry Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229920006172 Tetrafluoroethylene propylene Polymers 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000007790 solid phase Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
- 229920005560 fluorosilicone rubber Polymers 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/56—Investigating resistance to wear or abrasion
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0067—Fracture or rupture
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0611—Hydraulic or pneumatic indicating, recording or sensing means
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a device and a method for testing damage conditions of the outer surface of a packer rubber cylinder, and belongs to the field of well completion tests. The test device includes: the device comprises a test casing, an upper oil pipe nipple, a lower oil pipe nipple, a test packer, an upper end cover, a lower end cover and a pressure gauge. The upper end and the lower end of the test sleeve are connected with the upper end cover and the lower end cover; the top of the upper end cover is provided with a through pipe hole, and the side part of the upper end cover is provided with a through fluid hole; the lower end cover is closed; the upper oil pipe nipple, the testing packer and the lower oil pipe nipple are sequentially connected from top to bottom, and the upper oil pipe nipple is also connected with the upper end cover through a pipe hole; part of the upper oil pipe nipple, the test packer and the lower oil pipe nipple are positioned in the test casing, and a gap is formed between the bottom of the lower oil pipe nipple and the lower end cover; and the upper part and the lower part of the test sleeve are respectively provided with a pressure gauge which is respectively used for testing the internal pressure of the oil sleeve annulus above and below the packer. The testing device can obtain accurate and reliable testing results.
Description
Technical Field
The invention relates to the field of well completion tests, in particular to a device and a method for testing damage conditions of the outer surface of a packer rubber cylinder.
Background
In the well completion and oil testing operation of a deep well and an ultra-deep high-temperature high-pressure gas well, operations such as pipe column running, liquid replacement, packer setting, seal checking, acidification, liquid drainage, testing and the like are generally carried out. In the above operations, when a string with a packer is run in, the packer moves down in the wellbore fluid, and when fluid is replaced, the packer is in a static state, and fluid flows outside a rubber sleeve of the packer. In field operations, the running speed of the pipe string is usually based on experience, and the liquid replacing speed is usually recommended by packer manufacturers. If the running speed of the pipe column or the flow speed of the replacement fluid is too high, the fluid (particularly the solid-phase medium in the fluid) can erode and deform the outer surface of the rubber sleeve of the packer, so that the sealing performance of the packer is influenced, and the sealing failure of the packer, the annulus pressure of a gas well and other consequences are caused. Therefore, the method has important significance for ensuring the sealing performance of the packer after setting and the long-term integrity of the well after putting into production.
At present, for the related testing method of the damage condition of the outer surface of the packer rubber sleeve, the testing method specified in the API11D1 specification is generally referred to. According to the method, water is used as a fluid medium, one side of a packer is in contact with the inner wall of a sleeve pipe during testing, the flow direction of the fluid is the inflow of the upper end of the packer and the outflow of the lower end of the packer, and then the damage condition of the outer surface of a rubber sleeve of the packer is observed.
In the process of implementing the invention, the inventor finds that at least the following problems exist in the prior art:
the testing method provided by the prior art cannot reflect real on-site actual working conditions, so that the testing result cannot accurately reflect the influence of fluid on the damage of the outer surface of the packer rubber sleeve.
Disclosure of Invention
In view of the above, the invention provides a device and a method for testing the damage condition of the outer surface of a packer rubber barrel, which can solve the problem of low accuracy of a test result.
Specifically, the method comprises the following technical scheme:
in one aspect, a packer rubber outer surface damage condition testing device is provided, the testing device comprises: the test sleeve, the upper oil pipe short section, the lower oil pipe short section, the test packer, the upper end cover, the lower end cover and the pressure gauge are arranged in the test sleeve;
the upper end and the lower end of the test sleeve are respectively connected with the upper end cover and the lower end cover;
the top of the upper end cover is provided with a through pipe hole, and the side part of the upper end cover is provided with a through fluid hole communicated with the inside of the test sleeve;
the lower end cover is closed;
the upper oil pipe nipple, the testing packer and the lower oil pipe nipple are sequentially connected from top to bottom, and the upper oil pipe nipple is also connected with the upper end cover through the pipe passing hole;
part of the upper oil pipe nipple, the test packer and the lower oil pipe nipple are positioned in the test casing, and a gap is formed between the bottom of the lower oil pipe nipple and the lower end cover;
the upper portion and the lower portion of the test sleeve are respectively provided with the pressure gauge which is used for testing the internal pressure of the oil sleeve annulus above and below the test packer.
In one possible implementation manner, the testing apparatus further includes: two centralizers;
the centralizer is sleeved on the pipe wall of the upper oil pipe short section positioned outside the test casing pipe;
and the other centralizer is sleeved on the pipe wall of the lower oil pipe nipple.
In a possible implementation, a longitudinal through hole is provided in the wall of the centralizer located on the lower tubing nipple.
In one possible implementation manner, the upper oil pipe nipple is in threaded connection with the pipe hole;
and a backstop nut is further arranged on the top wall of the upper end cover and is in threaded connection with the upper oil pipe nipple.
In a possible implementation manner, the joints between the test sleeve and the upper end cover and the lower end cover are provided with sealing rings.
In one possible implementation, the test packer is in threaded connection with both the upper tubing nipple and the lower tubing nipple.
In another aspect, a method for testing damage conditions of the outer surface of a packer rubber cylinder is provided, and the testing method adopts any one of the devices for testing damage conditions of the outer surface of the packer rubber cylinder.
In one possible implementation, the testing method includes:
introducing fluid from the upper oil pipe nipple, wherein the fluid enters the oil sleeve annulus through the test packer and the lower oil pipe nipple and enters the gap between the lower oil pipe nipple and the lower end cover to go up, and finally returns out through the fluid hole of the upper end cover, so that the simulation of the working condition of the positive replacement fluid in the well completion oil testing operation is completed; and
fluid is introduced from a fluid hole of the upper end cover, the fluid descends to a gap between the lower oil pipe nipple and the lower end cover through an oil sleeve annulus, enters the lower oil pipe nipple to ascend, and finally returns out through an upper port of the upper oil pipe nipple to finish the simulation of the working condition of the replacement fluid in the well completion oil testing operation;
testing the internal pressure of the oil sleeve annulus above and below the packer in real time through a pressure gauge;
and changing fluid flow parameters, and respectively observing the damage conditions of the outer surfaces of the rubber cylinders of the packers.
In one possible implementation, the fluid flow parameters include: at least one of fluid type, fluid displacement, fluid temperature.
In one possible implementation, the fluid types include: completion fluids, mud, or annulus protection fluids.
The technical scheme provided by the embodiment of the invention has the beneficial effects that at least:
the device for testing the damage condition of the outer surface of the packer rubber cylinder provided by the embodiment of the invention can test the damage condition of the outer surface of the packer rubber cylinder caused by the influence of fluid. Specifically, fluid is introduced from an upper oil pipe nipple, enters an oil sleeve annulus through a test packer and a lower oil pipe nipple, flows upwards in the gap between the lower oil pipe nipple and a lower end cover, and finally returns out through a flow body hole of an upper end cover, so that the simulation of the working condition of positive replacement fluid in the well completion oil testing operation is completed; and introducing fluid from the fluid passing hole of the upper end cover, descending to the gap between the lower oil pipe nipple and the lower end cover through the oil sleeve annulus, entering the lower oil pipe nipple to ascend, and finally returning out through the upper port of the upper oil pipe nipple to finish the simulation of the working condition of the replacement fluid in the well completion oil testing operation. In the process, the internal pressure of the oil sleeve annulus above and below the packer is tested in real time through the pressure gauge, so that the critical pressure drop of the rubber sleeve of the packer during the flow of external fluid can be obtained, and data support is provided for field construction such as pipe column descending, liquid replacement and the like in well completion and oil testing operation. The damage condition of the outer surface of the rubber sleeve of the packer is observed by changing the fluid flow parameters, so that the fluid flow parameters applicable to the outer surface of the rubber sleeve of the packer are determined, and the method has important significance for ensuring the sealing performance of the packer after setting and the long-term integrity of the well after putting into service.
When the device for testing the damage condition of the outer surface of the packer rubber sleeve provided by the embodiment of the invention is used for testing, on one hand, the types of fluids such as completion fluid, mud, annular protection fluid and the like can be pertinently replaced so as to ensure that the test result can accurately reflect the influence of the actual fluid on the outer surface of the packer rubber sleeve. On the other hand, the packer is not in contact with the inner wall of the sleeve, so that fluid can pass through the periphery of the rubber cylinder of the packer, and the real fluid flowing condition can be reflected. On the other hand, the working condition of the positive replacement fluid and the working condition of the reverse replacement fluid in the well completion oil testing operation can be simulated, and the real working condition of the replacement fluid can be reflected. The device for testing the damage condition of the outer surface of the packer rubber cylinder provided by the embodiment of the invention can obtain an accurate and reliable test result.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an example packer rubber sleeve outer surface damage condition testing apparatus provided by an embodiment of the present invention under a positive fluid displacement condition;
FIG. 2 is a schematic structural diagram of an example packer rubber sleeve outer surface damage condition testing apparatus provided by an embodiment of the present invention under a reverse fluid condition.
The reference numerals denote:
1-testing the casing tube, wherein,
2-the short section of the oil feeding pipe,
3-a short section of the lower oil pipe,
4-testing the packer on the basis of the test,
401-a glue cylinder, wherein,
5-an upper end cover is arranged on the upper portion,
501-the holes of the fluid are crossed,
6-the end cover at the lower part,
7-a pressure gauge, wherein the pressure gauge is arranged,
8-a centering device for centering the drill bit,
9-a sealing ring is arranged on the upper portion of the shell,
10-stop nut.
Detailed Description
In order to make the technical solutions and advantages of the present invention clearer, the following will describe embodiments of the present invention in further detail with reference to the accompanying drawings.
In the prior art, when the damage condition of the outer surface of a rubber sleeve of a packer is tested, water is used as a fluid medium, one side of the packer is in contact with the inner wall of a sleeve during the test, and the fluid flows in from the upper end of the packer and flows out from the lower end of the packer in the flowing direction.
However, this has at least the following disadvantages:
(1) In the prior art, water is used as a fluid medium, and in actual operation of a well completion and oil testing site, the types of the fluid comprise various media such as completion fluid, slurry, annular protection fluid and the like, so that a test result provided by the prior art cannot accurately reflect the influence of actual fluid on the outer surface of a packer rubber sleeve;
(2) The prior art has been tested with one side of the packer in contact with the inside wall of the casing and fluid flowing primarily through the other side of the packer. In actual operation, fluid passes through the periphery of the packer rubber cylinder, and the real fluid flowing condition is not reflected;
(3) In the prior art, when testing, fluid enters the annular space between the packer and the casing from the upper end of the packer and flows out from the lower end of the packer and flows in a single direction. When the downhole packer is used for actual fluid replacement operation, fluid usually enters from an oil pipe at a wellhead and returns through the wellhead from an annulus between the oil pipe and a casing (positive fluid replacement), or enters from the annulus at the wellhead and returns through the wellhead from the inside of the oil pipe (reverse fluid replacement), and the real fluid replacement working condition is not reflected in the prior art.
In order to solve the above technical problem, an embodiment of the present invention provides a device for testing damage to an outer surface of a packer rubber, as shown in fig. 1 and fig. 2, the device includes: the test device comprises a test casing 1, an upper oil pipe nipple 2, a lower oil pipe nipple 3, a test packer 4, an upper end cover 5, a lower end cover 6 and a pressure gauge 7.
Wherein, the upper end and the lower end of the test sleeve 1 are respectively connected with an upper end cover 5 and a lower end cover 6;
the top of the upper end cover 5 is provided with a through pipe hole, and the side part of the upper end cover is provided with a through fluid hole 501 communicated with the inside of the test sleeve 1; the lower end cap 6 is closed.
The upper oil pipe nipple 2, the testing packer 4 and the lower oil pipe nipple 3 are sequentially connected from top to bottom, and the upper oil pipe nipple 2 is also connected with an upper end cover 5 through a pipe hole;
part of the upper oil pipe nipple 2, the testing packer 4 and the lower oil pipe nipple 3 are positioned in the testing casing 1, and a gap is formed between the bottom of the lower oil pipe nipple 3 and the lower end cover 6;
the upper part and the lower part of the test casing 1 are respectively provided with a pressure gauge 7 which is respectively used for testing the internal pressure of the oil casing annulus above and below the packer 4.
The device for testing the damage condition of the outer surface of the packer rubber cylinder provided by the embodiment of the invention can test the damage condition of the outer surface of the packer rubber cylinder caused by the influence of fluid. Specifically, as shown in fig. 1, fluid is introduced from the upper oil pipe nipple 2, enters the oil casing annulus through the test packer 4 and the lower oil pipe nipple 3, goes upward in the gap between the lower oil pipe nipple 3 and the lower end cover 6, and finally returns through the fluid flow hole 501 of the upper end cover 5, so that the simulation of the working condition of the positive displacement fluid in the well completion oil testing operation is completed. As shown in the attached figure 2, fluid is introduced from the fluid passing hole 501 of the upper end cover 5, flows down to the gap between the lower oil pipe nipple 3 and the lower end cover 6 through the oil sleeve annulus, enters the lower oil pipe nipple 3, flows upwards, and finally returns out through the upper port of the upper oil pipe nipple 2, so that the simulation of the working condition of the replacement fluid in the well completion oil testing operation is completed. In the process, the internal pressure of the oil sleeve annulus above and below the packer 4 is tested in real time through the pressure gauge 7, so that the critical pressure drop of the rubber sleeve 401 of the packer 4 can be tested when external fluid flows, and data support is provided for field construction such as pipe column descending, liquid replacement and the like in well completion and oil testing operation. The damage condition of the outer surface of the rubber sleeve 401 of the tested packer 4 is observed by changing the fluid flow parameters, so that the fluid flow parameters applicable to the outer surface of the rubber sleeve 401 of the tested packer 4 are determined, and the method has important significance for ensuring the sealing performance of the set packer and the long-term integrity of the set packer.
When the device for testing the damage condition of the outer surface of the packer rubber barrel provided by the embodiment of the invention is used for testing, on one hand, the types of fluids, such as completion fluid, slurry, annular protection fluid and the like, can be changed in a targeted manner, so that the testing result can accurately reflect the influence of the actual fluid on the outer surface of the rubber barrel 401 of the testing packer 4. On the other hand, the test packer 4 is not in contact with the inner wall of the test casing 1, so that fluid passes through the periphery of the rubber cylinder 401 of the test packer 4, and the real fluid flowing condition can be reflected. On the other hand, the working condition of the positive replacement fluid and the working condition of the reverse replacement fluid in the well completion oil testing operation can be simulated, and the real working condition of the replacement fluid can be reflected. The device for testing the damage condition of the outer surface of the packer rubber cylinder provided by the embodiment of the invention can obtain an accurate and reliable test result.
It is to be understood that the packer referred to in the embodiments of the present invention is a packer having a packing element 401.
Further, as shown in fig. 1 and fig. 2, the device for testing damage condition of the outer surface of the packer rubber provided by the embodiment of the invention further comprises: two centralizer 8, wherein, 8 covers of a centralizer are located and are gone up oil pipe nipple joint 2 and lie in on the outside pipe wall of test sleeve pipe 1, and 8 covers of another centralizer are located on the pipe wall of oil pipe nipple joint 3 down.
By using the centralizer 8, the test packer 4 is ensured to be centrally located within the casing, which facilitates improving the accuracy of the test results.
Further, be provided with vertical through-hole on the wall of centralizer 8 that is located oil pipe nipple joint 3 down to through setting up vertical through-hole, be used for making the fluid pass through, prevent that centralizer 8 from causing the resistance to the fluid, further improved the degree of accuracy of test result.
Go up oil pipe nipple joint 2 and pass the pipe hole on the upper end cover 5 and be connected with upper end cover 5, for the ease of dismouting to change the test packer 4 of different grade type, can make oil pipe nipple joint 2 and manage hole threaded connection. Further, in order to improve joint strength, prevent to break back, as shown in fig. 1 and fig. 2, still be provided with stopping nut 10 on the roof of upper end cap 5, stopping nut 10 and last oil pipe nipple 2 threaded connection.
The anti-backing nut 10 is used for further improving the connection strength of the upper oil pipe nipple 2 and the upper end cover 5. The retaining nut 10 may be in end-face contact with the upper end cap 5 only, or may be welded to the top wall of the upper end cap 5.
In order to improve the sealing performance of the device for testing the damage condition of the outer surface of the packer rubber cylinder and avoid influencing the test result, the sealing rings 9 are arranged at the joints between the test sleeve 1 and the upper end cover 5 and the lower end cover 6.
As an example, the upper end cap 5 may include: the top apron to and the last annular body of being connected with top apron lower extreme. Wherein, manage the orifice setting on the top apron, go up annular body suit on the upper end outer wall of test sleeve 1, sealing washer 9 sets up between upper annular body and test sleeve 1.
Further, the upper ring body can be sleeved on the test sleeve 1 by means of a threaded connection.
As an example, the lower end cap 6 includes: the bottom cover plate and a lower annular body connected with the lower end of the bottom cover plate. Wherein, the tube passing hole is arranged on the bottom cover plate, the lower annular body is sleeved on the outer wall of the lower end of the test sleeve 1, and the sealing ring 9 is arranged between the lower annular body and the test sleeve 1.
Further, the lower annular body can be sleeved on the test sleeve 1 in a threaded manner.
There is a gap of a certain height between the bottom closure plate and the bottom of the lower tubing nipple 3 for providing a passage for the fluid to pass through.
In the device for testing the damage condition of the outer surface of the packer rubber barrel, which is provided by the embodiment of the invention, the testing packer 4, the upper oil pipe nipple 2 and the lower oil pipe nipple 3 are in threaded connection, and the testing packer 4 can be conveniently assembled and disassembled by adopting a threaded connection mode on the premise of improving the connection strength.
It can be understood that the purpose of testing the rubber sleeve 401 of the test packer 4 made of different materials can be achieved by disassembling and assembling the test packer 4.
In summary, the embodiment of the present invention further provides a device for testing damage to an outer surface of a packer rubber sleeve, which has an optimized structure, as shown in fig. 1 and fig. 2, the device includes: the test casing pipe 1, go up oil pipe nipple 2, oil pipe nipple 3 down, test packer 4, upper portion end cover 5, lower part end cover 6, manometer 7, two centralizer 8.
Wherein, the upper end and the lower end of the test sleeve 1 are respectively connected with an upper end cover 5 and a lower end cover 6;
the top of the upper end cover 5 is provided with a through pipe hole, and the side part is provided with a through fluid hole 501 communicated with the interior of the test sleeve 1; the lower end cap 6 is closed.
Go up oil pipe nipple joint 2, test packer 4, lower oil pipe nipple joint 3 and from top to bottom connect in order, just, go up oil pipe nipple joint 2 and still be connected with upper portion end cover 5 through the tube hole.
Part go up oil pipe nipple joint 2, test packer 4 and oil pipe nipple joint 3 down and be located test sleeve 1, and have the clearance down between oil pipe nipple joint 3's the bottom and the lower part end cover 6.
The upper part and the lower part of the test casing 1 are respectively provided with a pressure gauge 7 which is respectively used for testing the internal pressure of the oil casing annulus above and below the packer 4.
A centralizer 8 cover is located and is gone up oil pipe nipple joint 2 and be located the outside pipe wall of test sleeve pipe 1, and another centralizer 8 cover is located down on the pipe wall of oil pipe nipple joint 3, is located to be provided with vertical through-hole on the wall of centralizer 8 on the oil pipe nipple joint 3 down.
Go up oil pipe nipple joint 2 with through tube hole threaded connection to still be provided with stopping nut 10 on the roof of upper portion end cover 5, stopping nut 10 with go up oil pipe nipple joint 2 threaded connection.
Sealing rings 9 are arranged at the joints between the test sleeve 1 and the upper end cover 5 and between the test sleeve 1 and the lower end cover 6.
The device for testing the damage condition of the outer surface of the packer rubber barrel provided by the embodiment of the invention at least has the following advantages:
when the device for testing the damage condition of the outer surface of the packer rubber barrel provided by the embodiment of the invention is used for testing, on one hand, the types of fluids, such as completion fluid, slurry, annular protection fluid and the like, can be changed in a targeted manner, so that the testing result can accurately reflect the influence of the actual fluid on the outer surface of the rubber barrel 401 of the testing packer 4. On the other hand, the testing packer is not in contact with the inner wall of the testing casing pipe, so that fluid passes through the periphery of the rubber cylinder 401 of the testing packer 4, and the real fluid flowing condition can be reflected. On the other hand, the working condition of the positive replacement fluid and the working condition of the reverse replacement fluid in the well completion oil testing operation can be simulated, and the real working condition of the replacement fluid can be reflected. The device for testing the damage condition of the outer surface of the packer rubber cylinder provided by the embodiment of the invention can obtain an accurate and reliable test result.
As shown in the attached figure 1, for the simulation of the working condition of the positive replacement fluid, fluid is introduced from the upper oil pipe nipple 2, enters the oil sleeve annulus through the test packer 4 and the lower oil pipe nipple 3 and enters the gap between the lower oil pipe nipple 3 and the lower end cover 6 to go upwards, and finally returns through the flow passing hole 501 of the upper end cover 5, so that the simulation of the working condition of the positive replacement fluid in the well completion oil testing operation is completed.
As shown in the attached figure 2, for the simulation of the working condition of the replacement fluid, fluid is introduced from the fluid passing hole 501 of the upper end cover 5, goes down to the gap between the lower oil pipe nipple 3 and the lower end cover 6 through the oil sleeve annulus, goes up through the lower oil pipe nipple 3, and finally returns out through the upper port of the upper oil pipe nipple 2, so that the simulation of the working condition of the replacement fluid in the well completion oil testing operation is completed.
In the process, the internal pressure of the oil casing annulus above and below the packer 4 is tested in real time through the pressure gauge 7, so that the critical pressure drop of the rubber sleeve 401 of the packer 4 can be tested when external fluid flows, and data support is provided for field construction such as pipe column lowering and liquid replacement in well completion and oil testing operation. The damage condition of the outer surface of the rubber sleeve 401 of the tested packer 4 is observed by changing the fluid flow parameters, so that the fluid flow parameters applicable to the outer surface of the rubber sleeve 401 of the tested packer 4 are determined, and the method has important significance for ensuring the sealing performance of the set packer and the long-term integrity of the set packer.
It is understood that the pressure gauge 7 is provided at the upper and lower portions on the outer wall of the test socket 1, but pressure sensing devices thereon are located at the upper and lower portions inside the test socket 1.
On the other hand, the embodiment of the invention also provides a method for testing the damage condition of the outer surface of the packer rubber, wherein any device for testing the damage condition of the outer surface of the packer rubber is adopted in the testing method.
Based on the packer rubber outer surface damage condition testing device provided by the embodiment of the invention, the testing method provided by the embodiment of the invention at least has the following advantages: in one aspect, the type of fluid, e.g., completion fluid, mud, annulus protection fluid, etc., may be purposefully changed to ensure that the test results accurately reflect the effect of the actual fluid on the outer surface of the packer sleeve. On the other hand, the packer is not contacted with the inner wall of the sleeve, so that fluid passes through the periphery of the rubber cylinder of the packer, and the real fluid flowing condition can be reflected. On the other hand, the working condition of the positive replacement fluid and the working condition of the reverse replacement fluid in the well completion oil testing operation can be simulated, and the real working condition of the replacement fluid can be reflected. The device for testing the damage condition of the outer surface of the packer rubber cylinder can obtain an accurate and reliable test result.
In the testing process, the working condition of the positive replacement fluid and the working condition of the negative replacement fluid in the well completion oil testing operation can be simulated to reflect the real working condition of the replacement fluid.
Specifically, as shown in FIG. 1, for positive displacement conditions: fluid is introduced from the upper oil pipe nipple 2, enters the oil sleeve annulus through the test packer 4 and the lower oil pipe nipple 3 and enters the gap between the lower oil pipe nipple 3 and the lower end cover 6 to go up, and finally returns through the overflow hole 501 of the upper end cover 5, so that the simulation of the working condition of the positive replacement fluid in the well completion oil testing operation is completed.
As shown in fig. 2, for the displacement fluid conditions: fluid is introduced from a fluid passing hole 501 of the upper end cover 5, flows down to the gap between the lower oil pipe nipple 3 and the lower end cover 6 through the oil sleeve annulus, enters the lower oil pipe nipple 3 to flow up, and finally returns out through the upper port of the upper oil pipe nipple 2, so that the simulation of the working condition of the replacement fluid in the well completion oil testing operation is completed.
In the process of the test, the internal pressure of the oil sleeve annulus above and below the packer 4 is tested in real time through the pressure gauge 7 so as to be used for monitoring the pressure change above and below the packer 4 during the fluid flow test, further obtain the critical pressure drop of the rubber sleeve 401 of the packer 4 during the external fluid flow test, and provide data support for the site construction of pipe column descending, fluid replacement and the like in the well completion oil testing operation.
In the process of testing, fluid flow parameters can be changed, and damage conditions of the outer surface of a rubber sleeve of the packer can be observed respectively according to different fluid flow parameters.
Wherein the fluid flow parameters include: at least one of fluid type, fluid displacement, fluid temperature.
For example, only one of the fluid flow parameters may be changed, such as: changing only the type of fluid, changing only the flow rate of the fluid, or changing only the temperature of the fluid.
It is also possible to change only two of the fluid flow parameters, for example, simultaneously changing fluid type and fluid displacement, simultaneously changing fluid type and fluid temperature, or simultaneously changing fluid displacement and fluid temperature.
All fluid flow parameters involved may also be changed simultaneously, for example, changing fluid type, fluid displacement, and fluid temperature simultaneously.
As an example, according to actual field requirements, in the embodiment of the present invention, the fluid types include but are not limited to: completion fluids, mud, or annulus protection fluids.
In a possible implementation manner, after the fluid is heated to the test temperature, the fluid is injected into the device for testing the damage condition of the outer surface of the packer rubber provided by the embodiment of the invention through a pipeline to be tested. Of course, the temperature and type of injected fluid may be varied according to the needs of the test, for example, completion fluids, annulus protection fluids, etc. may be used
Through dismantling the packer, change the packer that has different packing element types, for example the material of packing element can be different, and then realize the test to the circumstances such as fluid erosion of different packer packing element materials under test medium and operating mode.
It can be understood that, for the packer, the material of the upper rubber sleeve can be fluorocarbon rubber, fluorosilicone rubber, etc.
Therefore, the method for testing the damage condition of the outer surface of the packer rubber provided by the embodiment of the invention can be used for testing packer rubber made of different materials to obtain the damage condition of the packer rubber made of different materials under the fluid flow parameters, and comprises the following steps: erosion conditions and deformation conditions.
At least one of the type, the discharge capacity and the temperature of the fluid is changed, so that the damage conditions of erosion, deformation and the like of the outer surface of the packer rubber cylinder under different factors can be tested respectively.
Research shows that currently, the international main packer manufacturers generally test according to the test method in the API11D1 standard to obtain a recommended displacement, for example, when a certain block in Chongqing area is actually constructed, the recommended displacement of the replacement fluid is 0.3m 3 /min～0.5m 3 /min。
When the method provided by the embodiment of the invention is adopted for testing, the initial flow rate of the fluid is set to be 79L/min, or the pressure change at two ends of the rubber sleeve of the packer is monitored once every 5 minutes according to the initial flow rate specified by a packer manufacturer; increasing the discharge capacity by 79L/min every 5 minutes until the discharge capacity reaches or exceeds the maximum discharge capacity specified by a packer manufacturer; testing was continued for 2 hours at the specified displacement; and when the pressure values or the discharge capacities at the two ends of the packer reach the specified values or the limit values given by the packer manufacturer, finishing the test. Changing the fluid inlet and outlet direction, and repeating the steps.
In the testing process, the testing time, the fluid temperature, the fluid type, the fluid flow rate, the pressures at the upper end and the lower end of the packer and the like in the testing process are recorded, after the testing is finished, the pressure change conditions at the two ends of the packer are analyzed, the appearance and the geometric dimension of the outer surface of a rubber sleeve of the packer are observed, and the damage conditions such as erosion and the like caused by the fluid flow to the rubber sleeve of the packer are evaluated. Furthermore, the test result can be compared with a discharge value or a pressure drop value recommended by a packer manufacturer, so that the critical flow rate or discharge capacity of the packer rubber in underground actual work can be determined, and the sealing performance of the packer after setting and the long-term integrity of the packer after casting can be ensured.
The invention is further described below by means of specific examples:
example 1:
by applying the method provided by the embodiment of the invention, the AFLAS rubber sleeve well completion packer produced by a certain manufacturer is tested in the modified polysulfonate completion fluid, two flowing working conditions of the positive replacement fluid and the reverse replacement fluid are simulated, the medium temperature is 90 ℃, and the solid phase content in the modified polysulfonate completion fluid is 10%, 15% and 20% respectively. The liquid flow speed is 3m/s, and the test time is 2h under each flow working condition. And taking out the rubber cylinder after the flow test to observe the surface damage condition of the rubber cylinder. As a result, it was found that no damage was observed on the surface of the packer rubber after the flow test in the modified polysulfonate completion fluids having solid contents of 10%, 15% and 20%, respectively.
Example 2:
by applying the method provided by the embodiment of the invention, the AFLAS material rubber sleeve well completion packer is tested at the flow rates of 2m/s, 3m/s, 4m/s, 5m/s, 6m/s and 7m/s in the modified polysulfonate well completion fluid with the temperature of 90 ℃ and the solid content of 20%, the testing time is 2h, the rubber sleeve is taken out after the testing is finished, and the damage condition of the rubber sleeve is observed. As a result, it was found that the surface of the rubber sleeve had minute erosion traces at a flow rate of 5m/s, and the erosion traces on the outer surface of the rubber sleeve were more conspicuous at flow rates of 6m/s and 7m/s, indicating that the flow velocity of the fluid outside the rubber sleeve in the completion fluid could not exceed 5m/s.
The above description is only for facilitating the understanding of the technical solutions of the present invention by those skilled in the art, and is not intended to limit the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a packer packing element surface damage condition testing arrangement which characterized in that, testing arrangement includes: the device comprises a test casing, an upper oil pipe nipple, a lower oil pipe nipple, a test packer, an upper end cover, a lower end cover and a pressure gauge;
the upper end and the lower end of the test sleeve are respectively connected with the upper end cover and the lower end cover;
the top of the upper end cover is provided with a pipe passing hole, and the side part of the upper end cover is provided with a fluid passing hole communicated with the interior of the test sleeve;
the lower end cover is closed;
the upper oil pipe nipple, the testing packer and the lower oil pipe nipple are sequentially connected from top to bottom, and the upper oil pipe nipple is also connected with the upper end cover through the pipe passing hole;
part of the upper oil pipe nipple, the test packer and the lower oil pipe nipple are positioned in the test casing, and a gap is formed between the bottom of the lower oil pipe nipple and the lower end cover;
the upper part and the lower part of the test casing are respectively provided with one pressure gauge which is respectively used for testing the internal pressure of the oil sleeve annulus above and below the test packer.
2. The packer rubber outer surface damage condition testing device of claim 1, wherein the testing device further comprises: two centralizers;
the centralizer is sleeved on the pipe wall of the upper oil pipe short section positioned outside the test casing pipe;
and the other centralizer is sleeved on the pipe wall of the lower oil pipe nipple.
3. The device for testing the damage condition of the outer surface of the packer rubber sleeve as claimed in claim 2, wherein a longitudinal through hole is formed in the wall of the centralizer on the lower tubing nipple.
4. The device for testing damage to the outer surface of the packer rubber sleeve as claimed in claim 1, wherein the upper tubing nipple is in threaded connection with the tubular bore;
and the top wall of the upper end cover is also provided with a retaining nut, and the retaining nut is in threaded connection with the short section of the oil feeding pipe.
5. The device for testing the damage condition of the outer surface of the packer rubber sleeve as claimed in claim 1, wherein sealing rings are arranged at the joints of the test sleeve and the upper end cover and the lower end cover.
6. The device for testing the damage condition of the outer surface of the packer rubber sleeve as claimed in claim 1, wherein the test packer is in threaded connection with the upper tubing nipple and the lower tubing nipple.
7. A method for testing the damage condition of the outer surface of a packer rubber sleeve is characterized in that the testing method adopts the device for testing the damage condition of the outer surface of the packer rubber sleeve as claimed in any one of claims 1 to 6;
the test method comprises the following steps:
introducing fluid from the upper oil pipe nipple, wherein the fluid enters the oil sleeve annulus through the test packer and the lower oil pipe nipple and enters the gap between the lower oil pipe nipple and the lower end cover to go up, and finally returns out through the fluid hole of the upper end cover, so that the simulation of the working condition of the positive replacement fluid in the well completion oil testing operation is completed; and
introducing fluid from a flow body hole of the upper end cover, wherein the fluid descends to a gap between the lower oil pipe nipple and the lower end cover through the oil sleeve annulus, enters the lower oil pipe nipple to ascend, and finally returns out through an upper port of the upper oil pipe nipple to finish the simulation of the working condition of the replacement fluid in the well completion oil testing operation;
testing the internal pressure of the oil sleeve annulus above and below the packer in real time through a pressure gauge;
changing fluid flow parameters, and respectively observing the damage conditions of the outer surfaces of rubber cylinders of the packers;
the fluid flow parameters include: at least one of fluid type, fluid displacement, fluid temperature;
the fluid types include: completion fluids, mud, or annulus protection fluids.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010119735.1A CN113310830B (en) | 2020-02-26 | 2020-02-26 | Device and method for testing damage condition of outer surface of packer rubber cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010119735.1A CN113310830B (en) | 2020-02-26 | 2020-02-26 | Device and method for testing damage condition of outer surface of packer rubber cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113310830A CN113310830A (en) | 2021-08-27 |
| CN113310830B true CN113310830B (en) | 2023-03-24 |
Family
ID=77369989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010119735.1A Active CN113310830B (en) | 2020-02-26 | 2020-02-26 | Device and method for testing damage condition of outer surface of packer rubber cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113310830B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2521604Y (en) * | 2001-04-29 | 2002-11-20 | 中国石油天然气股份有限公司 | Packer pressure test detection device |
| CN104749040A (en) * | 2015-03-03 | 2015-07-01 | 中国石油天然气股份有限公司 | Test detection device and method for high-temperature packer rubber cylinder |
| CN105510148A (en) * | 2014-09-27 | 2016-04-20 | 中国石油化工集团公司 | Device for testing packer rubber barrel contact stress at high temperature and method thereof |
| CN205642812U (en) * | 2016-04-12 | 2016-10-12 | 中国石油化工股份有限公司 | Packer setting and pressure resistance detection device |
| CN208721346U (en) * | 2018-07-24 | 2019-04-09 | 中国石油天然气股份有限公司 | Packer testing device and system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130220599A1 (en) * | 2012-02-24 | 2013-08-29 | Colin Gordon Rae | External Pressure Testing of Gas Lift Valve in Side-Pocket Mandrel |
-
2020
- 2020-02-26 CN CN202010119735.1A patent/CN113310830B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2521604Y (en) * | 2001-04-29 | 2002-11-20 | 中国石油天然气股份有限公司 | Packer pressure test detection device |
| CN105510148A (en) * | 2014-09-27 | 2016-04-20 | 中国石油化工集团公司 | Device for testing packer rubber barrel contact stress at high temperature and method thereof |
| CN104749040A (en) * | 2015-03-03 | 2015-07-01 | 中国石油天然气股份有限公司 | Test detection device and method for high-temperature packer rubber cylinder |
| CN205642812U (en) * | 2016-04-12 | 2016-10-12 | 中国石油化工股份有限公司 | Packer setting and pressure resistance detection device |
| CN208721346U (en) * | 2018-07-24 | 2019-04-09 | 中国石油天然气股份有限公司 | Packer testing device and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113310830A (en) | 2021-08-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109541175B (en) | Device and method for simulating circulation of underground drilling fluid to form mud cakes | |
| CN106761679A (en) | The evaluating apparatus and method of a kind of the first interface agglutination quality of eccentric test well cementation | |
| CN203756119U (en) | Sleeve subassembly for simulated cementation test | |
| WO2022099785A1 (en) | Dynamic fracture plugging evaluation experiment apparatus and experiment method therefor | |
| CN108776075A (en) | Simulate the experimental rig and test method of downhole tool erosive wear | |
| CN109653729B (en) | Shaft assembly micro-leakage circulating sealing simulation detection device and method | |
| CN203756155U (en) | Well cementation failure evaluation device | |
| CN105178908B (en) | The chemical grouting packing device and method of down-hole formation closure | |
| CN107489394A (en) | Open hole packer three-ellipse experimental device | |
| CN113310830B (en) | Device and method for testing damage condition of outer surface of packer rubber cylinder | |
| CN111502640B (en) | Device and method for measuring formation pore pressure and leakage pressure | |
| CN205449698U (en) | Anti outer crowded intensity experimental apparatus of sand control pipe under evaluation high temperature environment | |
| US5563336A (en) | Appparatus for pressure testing of tubulars | |
| CN203925468U (en) | A kind of oil-water well is tested and is altered tubing string and use this to test the system of altering of testing of altering tubing string | |
| CN107939331B (en) | Wellhead protection device for water injection well | |
| CN112554835B (en) | Snubbing completion operation process method | |
| CN112324384B (en) | Non-well killing operation process method applying pressure control switch valve | |
| CN114060005B (en) | Underground gas storage pit shaft cement sheath tightness evaluation device | |
| CN105403392B (en) | Screw drill stator performance simulation testing device | |
| CN114856495A (en) | Underground device for testing gas-water output profile of coal bed gas combined production well | |
| CN111734407A (en) | Oil-gas well productivity evaluation experimental device considering different well completion modes | |
| CN217400881U (en) | Oil-water well comprehensive suction and blockage removal device with microelectronic test instrument | |
| CN216517943U (en) | Acidizing oil reservoir protection valve | |
| CN113340578B (en) | Packer high temperature simulation replacement liquid test device | |
| CN112483008B (en) | Special-shaped casing and application thereof in preventing gas well annulus pressure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |