CN110618162A - Self-expansion sand control screen pipe expansion performance experimental device and experimental method thereof - Google Patents
Self-expansion sand control screen pipe expansion performance experimental device and experimental method thereof Download PDFInfo
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- CN110618162A CN110618162A CN201810627300.0A CN201810627300A CN110618162A CN 110618162 A CN110618162 A CN 110618162A CN 201810627300 A CN201810627300 A CN 201810627300A CN 110618162 A CN110618162 A CN 110618162A
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- 239000004576 sand Substances 0.000 title claims abstract description 155
- 238000002474 experimental method Methods 0.000 title abstract description 47
- 239000012530 fluid Substances 0.000 claims abstract description 120
- 238000006073 displacement reaction Methods 0.000 claims abstract description 77
- 230000000903 blocking effect Effects 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 238000012360 testing method Methods 0.000 claims description 39
- 238000000034 method Methods 0.000 claims description 24
- 239000007788 liquid Substances 0.000 claims description 21
- 230000008961 swelling Effects 0.000 claims description 12
- 210000002310 elbow joint Anatomy 0.000 claims description 8
- 238000004088 simulation Methods 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 3
- 239000011164 primary particle Substances 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000011056 performance test Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000005484 gravity Effects 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
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- 238000005259 measurement Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
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- 230000000694 effects Effects 0.000 description 1
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- 210000004907 gland Anatomy 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000003921 particle size analysis Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/16—Investigating or analyzing materials by the use of thermal means by investigating thermal coefficient of expansion
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- 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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
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Abstract
The invention provides an experimental device and an experimental method for expansion performance of a self-expansion sand control screen pipe, wherein the experimental device comprises a cylinder body and the self-expansion sand control screen pipe positioned in the cylinder body, wherein the self-expansion sand control screen pipe comprises a base pipe and a self-expansion sleeve sleeved on the base pipe; the cylinder body is provided with a fluid inlet and a measuring port; a measuring rod and a displacement sensor connected with the measuring rod are arranged on the measuring port; the base is arranged at the opening end of the cylinder body and is in sealing connection with the end part of the base pipe, and a fluid outlet is formed in the base. The invention can measure the expansion performance of the self-expanding material, and can also measure the compressive strength and the sand blocking precision of the self-expanding material, thereby being beneficial to optimizing and selecting the proper self-expanding material and ensuring the working states of the self-expanding sand control screen pipe under different conditions, and further improving the success rate of the self-expanding sand control screen pipe completion technology in field application.
Description
Technical Field
The invention relates to the field of sand control completion of oil, gas and water wells, in particular to an experimental device and an experimental method for the expansion performance of a self-expanding sand control screen pipe.
Background
The self-expanding sand control screen pipe is one new kind of sand control screen pipe, and is one kind of sand control screen pipe with expanding part inside the screen pipe caused by temperature, pressure, fluid, etc. to fill the space between the screen pipe and the well wall. In the well completion process, a well completion pipe column of the compression-state self-expansion sand control screen pipe is lowered into a horizontal interval by utilizing a drill pipe or an oil pipe, a hanging packer is hung in a sitting mode, mud cakes are cleaned through positive circulation well completion fluid, the blockage of a near-wellbore area is removed, the permeability is improved, meanwhile, a soluble lowering protective layer of the outer layer of the self-expansion sand control screen pipe is dissolved, the compression-state self-expansion sand blocking layer is excited to expand to be attached to the wall of an open-hole well or the wall of a casing pipe, the dense filling of an annulus is realized, the hanging packer is hung in a sitting mode. The screen pipe is mainly applied to open hole horizontal well sand prevention completion, adopts an independent screen pipe well completion process to obtain gravel filling well completion annulus filling sand prevention effect, and has the advantages of simple process, short well completion period, high sand blocking precision and long validity period.
At present, the detection device and method for the performance of the sand control pipe at home and abroad use a mechanical sieve pipe or part of sand blocking units in the mechanical sieve pipe as objects for detection or evaluation, and mainly comprise sand blocking precision, anti-blocking capability and expansion performance. With the development of the sand control completion process and the research and development of the novel sand control screen pipe, the external diameter of the screen pipe is enlarged or the volume of the screen pipe is expanded by temperature, pressure or fluid and the like under the well, so that the novel self-expansion sand control screen pipe with annular filling is realized, and the novel self-expansion sand control screen pipe is applied under the well. The novel self-expansion sand control screen pipe not only needs to test the sand blocking precision, the anti-blocking capability and the expansion performance, but also needs to test the expansion performance, but no experimental device and method for testing the expansion performance of the self-expansion sand control screen pipe are established at present. Therefore, the design of the experimental device and the method for testing the expansion performance of the self-expansion sand control screen pipe has very important significance.
Disclosure of Invention
Features and advantages of the invention will be set forth in part in the description which follows, or may be obvious from the description, or may be learned by practice of the invention.
In order to overcome the problems in the prior art, the invention provides an experimental device for the expansion performance of a self-expansion sand control screen pipe, which comprises a cylinder body and the self-expansion sand control screen pipe positioned in the cylinder body, and is characterized in that:
the self-expansion sand control screen pipe comprises a base pipe and a self-expansion sleeve sleeved on the base pipe;
the cylinder body is provided with a fluid inlet and a measuring port;
a measuring rod and a displacement sensor connected with the measuring rod are arranged on the measuring port;
the base is arranged at the opening end of the cylinder body and is in sealing connection with the end part of the base pipe, and a fluid outlet is formed in the base.
Optionally, the self-expandable sand control screen expansion performance testing apparatus comprises:
a branch pipe mounted on the measuring port;
and the piston is positioned in the branch pipe, and is provided with a fixing through hole for the measuring rod to pass through.
Optionally, a liquid inlet is provided on the branch pipe.
Optionally, the self-expandable sand screen expansion performance testing apparatus includes a washpipe positioned in the base pipe and in communication with the fluid outlet.
Optionally, the self-expanding sand control screen expansion performance experiment device comprises a press cap arranged at one end of the base pipe close to the bottom of the cylinder body.
Optionally, the self-expanding sand control screen expansion performance experiment device comprises a left snap ring and a right snap ring, which are arranged on the base pipe and located at two ends of the self-expanding sleeve.
The invention provides an expansion performance experiment method of a self-expansion sand control screen pipe, which is performed by the expansion performance experiment device of the self-expansion sand control screen pipe provided by any embodiment of the invention, and the method comprises the following steps:
letting an experimental fluid pass through the self-expansion sand control screen pipe expansion performance experimental device at a preset temperature at a fixed displacement, recording expansion displacement, and after the fluid passing time reaches a first threshold value, if the expansion displacement fluctuates within a first preset value, determining that the expansion displacement is within a preset range
Increasing the preset temperature of the experimental fluid by a gradient, allowing the experimental fluid to pass through the self-expansion sand control screen pipe expansion performance experimental device at the fixed displacement, recording expansion displacement, and recording the current temperature as the starting expansion temperature if the expansion displacement is increased to exceed a second preset value after the fluid passing time reaches a second threshold value;
the inflation displacement is recorded at preset time intervals to determine the inflation rate.
The invention provides an expansion performance experiment method of a self-expansion sand control screen pipe, which is carried out by adopting the expansion performance experiment device of the self-expansion sand control screen pipe provided by any embodiment of the invention and is characterized by comprising the following steps:
and enabling the temperature of the experimental fluid to be higher than the swelling temperature, enabling the experimental fluid to pass through the swelling performance experimental device of the self-swelling sand control screen pipe at a fixed displacement, recording the swelling displacement at preset time intervals, and drawing a change curve of the swelling displacement with time under the fixed displacement.
The invention provides a method for testing the compressive strength of a self-expansion sand control screen pipe by adopting a self-expansion sand control screen pipe expansion performance testing device provided by any embodiment of the invention, which comprises the following steps:
sealing the piston and the branch pipe, and recording the initial displacement of the measuring rod;
circulating an experimental fluid at a preset temperature at a fixed displacement through the self-expansion sand control screen pipe expansion performance experimental device;
slowly increasing the pressure of the fluid inlet, recording the pressure of the fluid inlet and the displacement of the measuring rod at preset time intervals, stopping increasing the pressure of the fluid inlet when the displacement exceeds a preset displacement value, and recording the pressure of the fluid inlet as friction force f of the piston;
closing the test fluid, slowly increasing pressure to the piston until the displacement of the measuring rod is obviously reduced, and recording the pressure P at the moments；
The compressive strength P of the self-expanding material was calculated according to the following formulac；
Wherein S ishIs the piston cross-sectional area; swanThe contact area of the rod and the self-expanding sleeve is measured.
The invention provides a sand blocking precision experiment method of a self-expansion sand control screen pipe, which is carried out by adopting the expansion performance experiment device of the self-expansion sand control screen pipe provided by any embodiment of the invention and comprises the following steps:
filling experimental sand into an elbow joint connected with a fluid inlet of a self-expansion sand control screen pipe expansion performance experimental device;
enabling an experimental fluid to pass through the self-expansion sand control screen pipe expansion performance experimental device at a preset discharge capacity at a bottom hole simulation temperature, recording fluid inlet pressure at a preset time interval, and enabling the fluid to pass through the self-expansion sand control screen pipe for a certain time, wherein if the fluid inlet pressure is basically stable, the fluid inlet pressure is measured
And replacing the experimental sand with a small primary particle size, repeating the steps until the pressure of the fluid inlet is continuously increased, collecting the sand on the base, and calculating the sand yield according to the mass of the sand and the volume of the experimental fluid.
The invention provides an expansion performance experimental device of a self-expansion sand control screen pipe and a using method thereof.
The features and content of these solutions will be better understood by those skilled in the art from reading the present description.
Drawings
The advantages and realisation of the invention will be more apparent from the following detailed description, given by way of example, with reference to the accompanying drawings, which are given for the purpose of illustration only, and which are not to be construed in any way as limiting the invention, and in which:
FIG. 1 is a schematic structural diagram of an experimental apparatus for expansion performance of a self-expanding sand screen according to an embodiment of the present invention.
FIG. 2 is a schematic structural diagram of an experimental system for expansion performance of a self-expanding sand screen according to an embodiment of the present invention.
FIG. 3 is a schematic flow chart of an experimental method for expansion performance of a self-expanding sand screen according to an embodiment of the present invention.
FIG. 4 is a schematic flow chart of a method for testing the compressive strength of a self-expanding sand screen according to an embodiment of the present invention.
FIG. 5 is a schematic flow chart of a sand blocking accuracy testing method for the self-expanding sand control screen according to the embodiment of the invention.
Detailed Description
As shown in fig. 1, the present invention provides an apparatus for testing expansion performance of a self-expanding sand control screen, which comprises a cylinder 20, a self-expanding sand control screen located in the cylinder 20, a measuring rod 33, and a displacement sensor (not shown) connected to the measuring rod 33. Wherein:
the self-expansion sand control screen pipe comprises a base pipe 10 and a self-expansion sleeve 50 sleeved on the base pipe 10; wherein, the outer wall of base pipe 10 is provided with a plurality of through holes 11, and self-expanding sleeve 50 covers through holes 11.
The cylinder 20 is used for simulating the wall of a real oil well, and a fluid inlet 21 and a measuring port 22 are arranged on the cylinder 20. Generally, the fluid inlet 21, the measurement port 22 are disposed opposite the self-expanding sleeve 50. In order to make the fluid penetrate the self-expanding sleeve 50 more uniformly, the number of the fluid inlets 21 may be plural, more specifically, 2 to 20, for example, 6 depending on the length of the self-expanding sleeve 50, and the fluid inlets 21 are spirally distributed on the cylinder 20. In one embodiment of the present invention, an elbow fitting 61 is included, the elbow fitting 61 is connected to the fluid inlet 21, and the elbow fitting 61 is threadably connected to the fluid inlet 21. The elbow fitting 61 allows fluid to enter the barrel and also allows simulated formation sand to fill the barrel. Here, different sized wellbores may be simulated by varying the inside diameter of the barrel; the elbow joint is adopted, so that sand can completely enter the cylinder body along with the fluid, and the utilization rate of the sand is improved; a plurality of elbow joints are arranged on the cylinder body, so that fluid can uniformly enter the surface of the expansion material, and the number of the elbow joints can be determined according to actual needs.
The open end of the cylinder 20 is provided with a base 40, the base 40 is connected with the end of the base pipe 10 in a sealing way, and the base 40 is provided with a fluid outlet 41.
The measuring rod 33 is arranged on the measuring port 22, and the displacement sensor acquires the movement of the measuring rod to record the expansion displacement of the self-expansion sleeve, so that the expansion conditions at different moments can be obtained. The bottom of the measuring rod 33 is provided with a contact portion for contacting the expanded self-expanding sleeve. The surface of the contact part for contacting with the self-expansion sleeve is a curved surface or a cambered surface. In one embodiment of the present invention, the device further comprises a branch pipe 31 installed on the measuring port 22; the measuring rod 33 is located in the branch pipe 31, and the branch pipe 31 may be fixed to the measuring port 22 by a screw or the like. The measuring rod 33 has a first end located in the branch pipe 31 and connected to the displacement sensor, and a second end inserted into the measuring port 22 and capable of contacting the self-expandable sleeve 50 after the self-expandable sleeve 50 is expanded. For better centering of the measuring rod, a piston 32 is included, located in the branch pipe 31, and provided with a fixing through hole for the passage of the measuring rod 33. Preferably, the side wall of the branch pipe 31 is provided with a liquid inlet 34, and liquid can be added into the branch pipe through the liquid inlet 34, so that the friction between the piston and the inner wall of the branch pipe is reduced, and the piston can move up and down better.
The open end of the cylinder 20 is provided with a base 40, the base 40 is connected with the end of the base pipe 10 in a sealing way, and the base 40 is provided with a fluid outlet 41. Base 40 can fix barrel 20 and base pipe 10, more specifically, the open end of barrel 20 flushes with the top of base pipe 10, is equipped with annular protrusion 43 on the base 40, and the top of base pipe 10 is located the interval that annular protrusion 43 encloses, and in this embodiment, annular protrusion 43 sets up with base 40 coaxial line, the internal diameter of annular protrusion 43 and the external diameter cooperation of base pipe 10. In order to measure the pressure and temperature in the substrate tube more conveniently, a pressure measuring port 42 and a temperature measuring port 44 may be provided on the base 40. The outlet temperature and the outlet pressure of the circulating fluid can be measured through the pressure measurement port 42 and the temperature measurement port 44.
In one particular embodiment provided by the present invention, the base pipe has an outer diameter of 88mm, an inner diameter of 76mm and a length of 460 mm. The cylinder has an outer diameter of 179mm, an inner diameter of 152.4mm and a length of 492mm, 6 fluid inlets are spirally distributed on the cylinder, the fluid inlets have a bore diameter of 20mm and a phase of 60 °, the center of the initial fluid inlet is 120mm from one end of the cylinder, the axial distance between adjacent holes is 15mm, and each hole is provided with a standard internal thread. The self-expandable sleeve is cylindrical, and has an outer diameter of 133mm, a length of 89mm and a length of 275 mm. The elbow joints are 20mm in diameter, and each joint is provided with a standard external thread which can be fixed on the cylinder body. The lateral pipe has an outer diameter of 42mm, an inner diameter of 24mm and a length of 185 mm. The length of the piston is 20 mm. The base has an outer diameter of 500mm and a length of 245 mm. It should be noted that the specification of the base pipe, the cylinder, the self-expanding sleeve, and the elbow joint is not limited in the present invention.
To increase the fluid flow distance, the self-expanding sand screen expansion performance testing apparatus may include a washpipe 62 positioned within the base pipe 10 and in communication with the fluid outlet 41. The washpipe 62 may increase the flow distance of the fluid, simulating the flow of fluid in a horizontal wellbore.
Because base pipe 10 is the bottomless tubular structure, in order to prevent that fluid from flowing into the base pipe in its bottom, self-expanding sand control screen pipe expansibility experimental apparatus can include pressure cap 63, sets up the one end that is close to the bottom of barrel 20 at the base pipe, and pressure cap 63 can fixed connection on base pipe 10. It can be seen that the bottom end of the base pipe 10 is now plugged by a gland, thereby preventing fluid from entering the base pipe directly from this end.
In order to better fix the self-expanding sleeve 50, the self-expanding sand control screen expansion performance testing device comprises a left snap ring 64 and a right snap ring 65, which are arranged on the base pipe 10 and are positioned at two ends of the self-expanding sleeve 50.
Brackets 66 may also be provided on the outer walls of the barrel 20 at both ends to secure the entire experimental device against rolling. The bracket 66 may be directly connected to the outer wall of the cartridge body 20, or may be provided separately from the cartridge body 20, and the cartridge body 20 is directly placed on the bracket 66.
As shown in fig. 2, an embodiment of the present invention further provides an expansion performance testing system for a self-expanding sand control screen, which includes:
the invention provides an experimental device 100 for the expansion performance of a self-expansion sand control screen;
the liquid inlet groove 110 is connected with a fluid inlet of the self-expansion sand control screen pipe expansion performance experiment device 100 through a liquid inlet pipeline 120;
the liquid outlet groove 130 is connected with a fluid outlet of the self-expansion sand control screen pipe expansion performance experiment device 100 through a liquid outlet pipeline 140;
a circulation pipeline 150 having one end connected to the liquid inlet tank 110 and the other end connected to the liquid outlet tank 130; the circulation line 150 is provided with a circulation pump 160.
The fluid inlet tank 110 is used to store fluid to be introduced into the experimental apparatus for testing expansion performance of self-expanding sand control screen 100. The liquid inlet pipeline 120 is also provided with a high-pressure pump 121 and a preheater 122; wherein, the high pressure pump 120 provides power for the experimental fluid; the preheater 122 is used to heat the test fluid to the desired temperature for the test. A first pressure sensor 123 is further disposed on the liquid inlet line 120, and the first pressure sensor 123 is disposed near the self-expanding sand control screen expansion performance testing experimental apparatus 100 and is used for measuring the fluid inlet pressure.
The liquid outlet tank 130 is used for storing the circulated fluid, and the fluid in the liquid outlet tank 130 can be pumped into the liquid inlet tank 110 by the circulating pump 160, which is not only beneficial to the recycling of the fluid, but also can quickly increase the temperature of the fluid. A flow meter 131 is arranged on the liquid outlet line 130 for measuring the outlet flow of the fluid.
A temperature sensor 101 and a second pressure sensor 102 are connected to a temperature measuring port and a pressure measuring port of the self-expansion sand control screen expansion performance test experimental device 100 and are used for measuring the temperature of the inner cavity of the base pipe and the pressure of the inner cavity of the base pipe.
The first pressure sensor 123, the temperature sensor 101, the second pressure sensor 102, and the flow meter 131 may be connected to the computer 180, and the computer 180 may record and store the corresponding measurement values.
In the experimental process of self-expanding sand control screen pipe expansion performance test, during experimental fluid passed through the high-pressure pump entering preheater in from the feed liquor groove, the preheater heated experimental fluid to the required temperature of experiment, and experimental fluid flows out to going out the liquid tank behind the self-expanding sand control screen pipe expansion performance test experimental apparatus afterwards. The fluid in the liquid outlet groove can enter the liquid inlet groove through the circulating pump, so that the cyclic utilization of the experimental fluid is realized.
The invention provides an expansion performance experiment method of a self-expansion sand control screen pipe, which can be realized by adopting the expansion performance experiment device of the self-expansion sand control screen pipe provided by any embodiment of the invention, and comprises the following steps:
and S11, starting.
Firstly, assembling an expansion performance experiment device of the self-expansion sand control screen pipe, firstly sleeving a self-expansion sleeve on a base pipe, and respectively clamping two ends of the self-expansion sleeve by a left clamping ring and a right clamping ring; secondly, a pressing cap is arranged at one end of the experimental base tube and is placed into the barrel body; then, assembling a base on the cylinder; next, assembling a mandril and a gravity sensor; subsequently, the elbow fitting is assembled; and assembling the self-expansion sand control screen pipe expansion performance experimental device. The assembled self-expanding sand control screen pipe expansion performance experiment device can be used for entering an experiment after being connected with a pipeline and an experiment instrument, and when the experiment device is specifically implemented, the self-expanding sand control screen pipe expansion performance experiment system shown in the figure 2 can be used for carrying out the experiment.
And S12, enabling the experimental fluid to pass through the self-expansion sand control screen pipe expansion performance experimental device at a preset temperature and at a fixed displacement, and recording the expansion displacement.
The fixing temperature is the starting temperature, typically close to room temperature, for example 40 ℃. The fixed displacement may depend on the particular test fluid and may be required to be able to simulate downhole production. The expansion displacement may be acquired by a displacement sensor. In addition, the fluid inlet pressure and the pressure in the inner cavity of the base pipe can be recorded simultaneously.
S13, after the fluid passing time reaches a first threshold value, judging that the expansion displacement fluctuates within a first preset value, if so, entering the step S14; if not, go to step S16;
the first threshold value may be 3 to 8 hours, preferably 5 to 6 hours, the first preset value being less than 1mm, preferably less than 0.5mm, for example 0.2 mm. If the expansion displacement fluctuates within a first predetermined value, it indicates that the self-expanding sleeve is not expanded.
S14, increasing the preset temperature of the experimental fluid by a gradient, and recording the expansion displacement through the self-expansion sand control screen pipe expansion performance experimental device at the fixed displacement;
each gradient is from 1 to 8 deg.C, preferably from 2 to 5 deg.C, for example 3 deg.C. The fixed displacement is not changed at this time, and when the expansion displacement is recorded, the fluid inlet pressure and the pressure in the inner cavity of the base pipe can be recorded simultaneously.
And S15, enabling the fluid passing time to reach a second threshold value.
The second threshold may be 3 to 8 hours, preferably 5 to 6 hours.
S16, judging that the expansion displacement is increased to exceed a second preset value, if so, entering a step S17; if not, returning to the step S14;
the second preset value is greater than 1mm, for example 1.5mm or 2mm, etc.
S17, recording the current temperature as the starting expansion temperature;
that is, if the expansion displacement value increases beyond the second predetermined value, it indicates that the self-expanding sleeve has already started to expand.
And S18, recording the expansion displacement at preset time intervals to determine the expansion rate.
The predetermined time interval is 1min to 15min, such as 5min, 10min, etc. When recording the expansion displacement, the fluid inlet pressure and the pressure in the inner cavity of the base pipe can be recorded simultaneously.
And S19, ending.
The invention provides an expansion performance experiment method of a self-expansion sand control screen pipe, which can be realized by adopting the expansion performance experiment device of the self-expansion sand control screen pipe provided by any embodiment of the invention, and comprises at least one of the following four steps:
and enabling the temperature of the experimental fluid to be higher than the swelling temperature, enabling the experimental fluid to pass through the swelling performance experimental device of the self-swelling sand control screen pipe at a fixed displacement, recording the swelling displacement at preset time intervals, and drawing a change curve of the swelling displacement with time under the fixed displacement.
The time interval may depend on the specific material of the self-expanding sleeve, and typically the predetermined time interval is 1min to 15min, for example 5min, 10min, etc. The above steps may be performed individually, or may be performed after step S6.
The invention provides a compression strength experiment method of a self-expansion sand control screen pipe, which can be realized by adopting an expansion performance experiment device of the self-expansion sand control screen pipe provided by any embodiment of the invention, and comprises the following steps:
and S31, starting.
Firstly, assembling an expansion performance experiment device of the self-expansion sand control screen pipe, firstly sleeving a self-expansion sleeve on a base pipe, and respectively clamping two ends of the self-expansion sleeve by a left clamping ring and a right clamping ring; secondly, a pressing cap is arranged at one end of the experimental base tube and is placed into the barrel body; then, assembling a base on the cylinder; then, assembling a branch pipe, a mandril, a piston and a gravity sensor; subsequently, the elbow fitting is assembled; and assembling the self-expansion sand control screen pipe expansion performance experimental device. The assembled self-expanding sand control screen pipe expansion performance experiment device can be used for entering an experiment after being connected with a pipeline and an experiment instrument, and when the experiment device is specifically implemented, the self-expanding sand control screen pipe expansion performance experiment system shown in the figure 2 can be used for carrying out the experiment.
S32, sealing the piston and the branch pipe, and recording the initial displacement of the measuring rod;
more specifically, a sealing ring can be arranged at the position of the piston, so that liquid is not fed between the piston and the branch pipe;
s33, circulating the test fluid at a preset temperature and a fixed displacement through the self-expansion sand control screen expansion performance test device;
the predetermined temperature is higher than the expansion starting temperature of the self-expanding sleeve, preferably 50 ℃ to 80 ℃, such as 50 ℃, 55 ℃, 60 ℃, 65 ℃, 70 ℃ and the like.
S34, slowly increasing the fluid inlet pressure, recording the fluid inlet pressure and the displacement of the measuring rod at preset time intervals, stopping increasing the fluid inlet pressure when the displacement exceeds a preset displacement value, and recording the fluid inlet pressure as the friction force f of the piston;
the preset time interval is less than 2min, preferably less than 1min, for example 0.5 mm. The predetermined displacement value is 0.1mm to 2mm, preferably 02mm to 1mm, such as 0.2mm, 0.5mm, 0.8 mm. In particular implementations, the fluid inlet pressure can be slowly increased by a hand pump; when the displacement of the displacement sensor is recorded, the pressure of a fluid inlet can be recorded at the same time, when the displacement exceeds a preset displacement value, the pressure is stopped to be increased, and the acting force generated by the pressure intensity at the moment is the friction force f of the piston;
s35, closing the experimental fluid, slowly increasing the pressure to the piston until the displacement of the measuring rod is obviously reduced, and recording the pressure P at the moments；
After the experimental fluid is closed, the piston can be slowly stressed by using the hand pump, and at the moment, the displacement value detected by the displacement sensor is slowly reduced and finally kept unchanged. The piston was then continuously forced and the pressure recorded at this time as the displacement value decreased significantly.
S36, calculating the compressive strength P of the self-expanding material according to the following formulac；
Wherein S ishIs the piston cross-sectional area; swanThe contact area of the rod and the self-expanding sleeve is measured.
And S37, ending.
By repeating the above steps S31 to S37 at different temperatures, the compressive strength of the self-expandable material at different temperatures can be obtained.
The invention provides a sand blocking precision experiment method of a self-expansion sand control screen pipe, which can be realized by adopting an expansion performance experiment device of the self-expansion sand control screen pipe provided by any embodiment of the invention, and comprises the following steps:
and S41, starting.
Firstly, assembling an expansion performance experiment device of the self-expansion sand control screen pipe, firstly sleeving a self-expansion sleeve on a base pipe, and respectively clamping two ends of the self-expansion sleeve by a left clamping ring and a right clamping ring; secondly, a pressing cap is arranged at one end of the experimental base tube and is placed into the barrel body; then, assembling a base on the cylinder; then, assembling a branch pipe, a mandril, a piston and a gravity sensor; subsequently, the elbow fitting is assembled; and assembling the self-expansion sand control screen pipe expansion performance experimental device. The assembled self-expanding sand control screen pipe expansion performance experiment device can be used for entering an experiment after being connected with a pipeline and an experiment instrument, and when the experiment device is specifically implemented, the self-expanding sand control screen pipe expansion performance experiment system shown in the figure 2 can be used for carrying out the experiment.
S42, filling experimental sand into an elbow joint connected with a fluid inlet of the self-expansion sand control screen pipe expansion performance experimental device;
prior to step S41, the previously prepared test sand is washed to ensure that the sand is free of impurities.
S43, passing the experimental fluid through the self-expansion sand control screen pipe expansion performance experimental device at a preset displacement under the bottom hole simulation temperature, and recording the fluid inlet pressure at preset time intervals;
the bottom hole simulation temperature is 50 ℃ to 80 ℃, for example, 60 ℃. The time interval may depend on the specific material of the self-expanding sleeve, and typically the predetermined time interval is 1min to 15min, for example 5min, 10min, etc.
S44, after the fluid passes through for a certain time, judging that the pressure of the fluid inlet is basically stable, if so, entering the step S45; if not, the fluid inlet pressure continues to increase, at which point step S46 is entered;
the above-mentioned passing of the fluid for a certain period of time means passing the fluid through the self-expanding sand control screen expansion performance test device for a certain period of time, preferably 12 hours to 48 hours, for example 24 hours.
S45, replacing the experimental sand with the small primary particle size, and returning to the step S42;
and S46, collecting the sand on the base, and calculating the sand yield according to the mass of the sand and the volume of the experimental fluid.
In specific implementation, a laser particle size analyzer can be used for particle size analysis.
And S47, ending.
The invention provides an expansion performance experiment device of a self-expansion sand control screen pipe and a method for acquiring the expansion performance, the compressive strength and the sand blocking precision of the self-expansion sand control screen pipe by using the expansion performance experiment device of the self-expansion sand control screen pipe. The invention is beneficial to preferably selecting the self-expansion sleeve made of proper materials and ensuring the working states of the self-expansion sand control screen pipe under different conditions, thereby improving the success rate of the self-expansion sand control screen pipe completion technology in field application.
While the preferred embodiments of the present invention have been illustrated in the accompanying drawings, those skilled in the art will appreciate that various modifications can be made to the present invention without departing from the scope and spirit of the invention. For instance, features illustrated or described as part of one embodiment, can be used with another embodiment to yield a still further embodiment. The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, which is defined in the appended claims.
Claims (10)
1. The utility model provides a self-expanding sand control screen pipe expansibility experimental apparatus, includes the barrel and is located self-expanding sand control screen pipe in the barrel, its characterized in that:
the self-expansion sand control screen pipe comprises a base pipe and a self-expansion sleeve sleeved on the base pipe;
the cylinder body is provided with a fluid inlet and a measuring port;
a measuring rod and a displacement sensor connected with the measuring rod are arranged on the measuring port;
the base is arranged at the opening end of the cylinder body and is in sealing connection with the end part of the base pipe, and a fluid outlet is formed in the base.
2. The apparatus for testing expansion performance of a self-expanding sand control screen of claim 1, wherein the apparatus for testing expansion performance of a self-expanding sand control screen comprises:
a branch pipe mounted on the measuring port;
and the piston is positioned in the branch pipe, and is provided with a fixing through hole for the measuring rod to pass through.
3. The apparatus for testing expansion performance of a self-expanding sand control screen according to claim 2, wherein the lateral pipe is provided with a liquid inlet.
4. The self-expanding sand screen expansion performance testing apparatus of claim 1, wherein the self-expanding sand screen expansion performance testing apparatus comprises a washpipe positioned within the base pipe and in communication with the fluid outlet.
5. The apparatus for testing expansion performance of a self-expanding sand screen of claim 1, wherein the apparatus comprises a pressure cap disposed at an end of the base pipe near the bottom of the cylinder.
6. The expansion performance testing apparatus of the self-expanding sand control screen according to claim 1, wherein the expansion performance testing apparatus comprises a left snap ring and a right snap ring, which are disposed on the base pipe and located at two ends of the self-expanding sleeve.
7. A method for testing the expansion performance of a self-expanding sand screen using the apparatus for testing the expansion performance of a self-expanding sand screen according to any one of claims 1 to 6, comprising:
letting an experimental fluid pass through the self-expansion sand control screen pipe expansion performance experimental device at a preset temperature at a fixed displacement, recording expansion displacement, and after the fluid passing time reaches a first threshold value, if the expansion displacement fluctuates within a first preset value, determining that the expansion displacement is within a preset range
Increasing the preset temperature of the experimental fluid by a gradient, allowing the experimental fluid to pass through the self-expansion sand control screen pipe expansion performance experimental device at the fixed displacement, recording expansion displacement, and recording the current temperature as the starting expansion temperature if the expansion displacement is increased to exceed a second preset value after the fluid passing time reaches a second threshold value;
the inflation displacement is recorded at preset time intervals to determine the inflation rate.
8. A method for testing the expansion performance of a self-expanding sand screen using the apparatus for testing the expansion performance of a self-expanding sand screen according to any one of claims 1 to 6, comprising:
and enabling the temperature of the experimental fluid to be higher than the swelling temperature, enabling the experimental fluid to pass through the swelling performance experimental device of the self-swelling sand control screen pipe at a fixed displacement, recording the swelling displacement at preset time intervals, and drawing a change curve of the swelling displacement with time under the fixed displacement.
9. A method for testing the compressive strength of a self-expanding sand control screen by using the device for testing the expansion performance of the self-expanding sand control screen according to any one of claims 1 to 6, comprising the following steps:
sealing the piston and the branch pipe, and recording the initial displacement of the measuring rod;
circulating an experimental fluid at a preset temperature at a fixed displacement through the self-expansion sand control screen pipe expansion performance experimental device;
slowly increasing the pressure of the fluid inlet, recording the pressure of the fluid inlet and the displacement of the measuring rod at preset time intervals, stopping increasing the pressure of the fluid inlet when the displacement exceeds a preset displacement value, and recording the pressure of the fluid inlet as the friction force f of the piston;
closing the test fluid, slowly increasing pressure to the piston until the displacement of the measuring rod is obviously reduced, and recording the pressure P at the moments；
The compressive strength P of the self-expanding material was calculated according to the following formulac；
Wherein S ishIs the piston cross-sectional area; swanThe contact area of the rod and the self-expanding sleeve is measured.
10. A method for testing sand blocking accuracy of a self-expanding sand control screen by using the device for testing expansion performance of a self-expanding sand control screen according to any one of claims 1 to 6, comprising the steps of:
filling experimental sand into an elbow joint connected with a fluid inlet of a self-expansion sand control screen pipe expansion performance experimental device;
enabling an experimental fluid to pass through the self-expansion sand control screen pipe expansion performance experimental device at a preset discharge capacity at a bottom hole simulation temperature, recording fluid inlet pressure at a preset time interval, and enabling the fluid to pass through the self-expansion sand control screen pipe for a certain time, wherein if the fluid inlet pressure is basically stable, the fluid inlet pressure is measured
And replacing the experimental sand with a small primary particle size, repeating the steps until the pressure of the fluid inlet is continuously increased, collecting the sand on the base, and calculating the sand yield according to the mass of the sand and the volume of the experimental fluid.
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