CN114323482B - Detection device - Google Patents
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- CN114323482B CN114323482B CN202011045088.0A CN202011045088A CN114323482B CN 114323482 B CN114323482 B CN 114323482B CN 202011045088 A CN202011045088 A CN 202011045088A CN 114323482 B CN114323482 B CN 114323482B
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- 238000001514 detection method Methods 0.000 title claims abstract description 39
- 238000007789 sealing Methods 0.000 claims abstract description 144
- 239000003129 oil well Substances 0.000 claims abstract description 45
- 230000006835 compression Effects 0.000 claims description 26
- 238000007906 compression Methods 0.000 claims description 26
- 238000010438 heat treatment Methods 0.000 claims description 18
- 230000007246 mechanism Effects 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 9
- 238000009530 blood pressure measurement Methods 0.000 claims description 7
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- 210000004907 gland Anatomy 0.000 claims 2
- 230000008859 change Effects 0.000 abstract description 9
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- 238000012856 packing Methods 0.000 description 15
- 239000000945 filler Substances 0.000 description 10
- 238000005299 abrasion Methods 0.000 description 8
- 238000003825 pressing Methods 0.000 description 8
- 238000005260 corrosion Methods 0.000 description 7
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- 239000007788 liquid Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000010795 Steam Flooding Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
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- 230000002378 acidificating effect Effects 0.000 description 1
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- 238000005461 lubrication Methods 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention provides a detection device for detecting whether a sealing element fails, comprising: the oil well model is provided with a sealing cavity and a wellhead, and the sealing cavity is communicated with the wellhead; the sealing piece is arranged on the wellhead and used for sealing the wellhead, and a mounting hole is formed in the sealing piece; the polished rod is movably inserted into the mounting hole of the sealing element so as to move relative to the sealing element; and the pressure measuring assembly is connected with the oil well model so as to measure the pressure in the sealing cavity when the polished rod moves relative to the sealing element and judge whether the sealing element fails or not by observing the change of the pressure in the sealing cavity. The detection device solves the problem that a sealing element cannot be replaced in time in the prior art.
Description
Technical Field
The invention relates to the technical field of oilfield exploitation, in particular to a detection device.
Background
The traditional thickened oil exploitation mode mainly takes steam huff and puff and steam flooding as main, such as a CO2 composite steam flooding technology, namely high-temperature and high-pressure steam and CO2 are injected into a shaft, so that the viscosity of crude oil is reduced, and the aim of exploitation is achieved. However, because the heavy oil reservoir has the characteristics of heavy oil, high pressure, high temperature, acid corrosion medium containing CO2 and the like, the heavy oil well has the problems that the wellhead sealing filler is easily leaked due to the influences of the temperature, viscosity, corrosion medium, water content, sucker rod abrasion and the like of produced liquid along with the extension of the production time, and the wellhead sealing filler and the device are always a great difficulty in front of us. Although a great deal of research has been done over the years to replace various types of wellhead packing and devices, none has been fundamentally addressed. The phenomenon that oil flows out of a wellhead caused by leakage of a wellhead sealing filler and a device still happens sometimes, and in the field production process, the service cycle of the packing box used at present is different, and the average service cycle is about one week. Therefore, the sealing packing is frequently replaced, so that the oil extraction rate of the oil extraction well is affected, the waste of manpower, material resources and resources is caused, the labor intensity of workers is greatly increased, and meanwhile, the environmental pollution of an oil field is caused.
The research finds that: the main reasons for the failure and leakage of the wellhead sealing packing and the device are as follows: the complex working conditions such as abrasion of the on-site pumping polished rod and sealing filler, corrosion of acid medium, high temperature, compression load applied to the sealing filler, combined action and the like. For example, high temperature effects tend to prematurely age wellhead sealing packing; when the oil pumping polished rod reciprocates in the wellhead sealing filler, the abrasion of the wellhead sealing filler, especially the eccentric wear, is easily caused due to the acidic corrosion of the polished rod, the frequency of oil leakage caused by the eccentric wear is found to be higher by statistics, and the oil leakage starts after the eccentric wear occurs for 5-7 d (2-3 d in severe cases) according to statistics, so that the sealing structure of the packing is damaged; when the intermittent oil well does not produce oil, the polish rod and the sealer packing are subjected to dry grinding, so that the polish rod is very easy to generate heat and blacken, and abrasion of the polish rod is accelerated; when the water content of the produced fluid of the oil well is more than 74.02%, the produced fluid is converted into a water-in-oil phase from water-in-oil type, and the friction lubricant is changed into produced water from crude oil, so that the abrasion is serious due to the loss of the lubrication function of the crude oil. More importantly, the service cycle of the on-site wellhead sealing packing (mainly comprising special rubber, graphite packing and the like) is not clear, and on-site tracking investigation discovers that staff can replace the packing after leakage occurs, or replace the packing too early, so that the sealing performance and the service life of the wellhead sealing packing under different working conditions can not be accurately obtained, and the waste of the sealing packing is caused.
Disclosure of Invention
The invention mainly aims to provide a detection device which is used for solving the problem that a sealing element cannot be replaced in time in the prior art.
In order to achieve the above object, according to one aspect of the present invention, there is provided a detection device for detecting whether a seal member is failed, the detection device comprising: the oil well model is provided with a sealing cavity and a wellhead, and the sealing cavity is communicated with the wellhead; the sealing piece is arranged on the wellhead and used for sealing the wellhead, and a mounting hole is formed in the sealing piece; the polished rod is movably inserted into the mounting hole of the sealing element so as to move relative to the sealing element; and the pressure measuring assembly is connected with the oil well model so as to measure the pressure in the sealing cavity when the polished rod moves relative to the sealing element and judge whether the sealing element fails or not by observing the change of the pressure in the sealing cavity.
Further, the pressure measurement assembly includes: the pressure pipeline is inserted at one end of the pressure pipeline at the upper part of the sealing cavity so as to be communicated with the sealing cavity; a pressure gauge is disposed on the pressure line for measuring the pressure within the pressure line.
Further, the detection device further includes: and the compression assembly is connected with the oil well model and used for fixing the sealing piece at the wellhead.
Further, the hold-down assembly includes: the pressing cover plate is arranged on one side of the sealing element, which is far away from the wellhead; for securing the seal at the wellhead; the connecting screw is connected with the compaction cover plate and the oil well model; the compression nut is movably sleeved on the connecting screw rod, so that the compression cover plate is pushed to compress the sealing element at the wellhead by adjusting the position on the connecting screw rod.
Further, the hold-down assembly further comprises: and a plurality of adjustment pads, each of which is selectively disposed between the compression cover plate and the well model, wherein the dimensions of each adjustment pad are different from each other to correspondingly select the adjustment pad according to a difference in pressure applied to the seal.
Further, a locating hole is further formed in the oil well model, the locating hole and the sealing cavity form a stepped hole, and the sealing piece is arranged in the locating hole to seal the wellhead.
Further, the detection device further includes: the driving assembly is in driving connection with the polish rod so as to drive the polish rod to do reciprocating linear motion relative to the sealing piece.
Further, the drive assembly includes: the crank connecting rod mechanism is connected with the driving motor so as to drive the polish rod to move under the drive of the driving motor.
Further, the detection device further includes: the counter is used for recording the rotation times of a crank and connecting rod mechanism crankshaft or recording the reciprocating times of a polished rod.
Further, the detection device further includes: the heating assembly is connected with the oil well model and used for heating materials in the sealing cavity; the temperature measuring assembly is arranged in the sealing cavity and used for measuring the temperature in the sealing cavity.
By applying the technical scheme of the invention, the detection device is used for providing reference for the time when the sealing element for sealing and adding materials on the wellhead of an actual oil well fails and for the time when the sealing element is replaced optimally, an oil well model is designed for simulating an oil well structure in an actual oil field, the oil well model is provided with a sealing cavity for simulating the internal environment of the actual oil well, the sealing element is the same as the actual wellhead sealing and filling materials, the polished rod is inserted into a mounting hole for simulating the polished rod of the oil well in the oil field, when the detection device is used, the polished rod is inserted into the mounting hole for reciprocating movement, and a pressure measuring component is arranged in the sealing cavity.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
fig. 1 shows a cross-sectional view of an embodiment of a detection device according to the invention;
FIG. 2 shows a schematic diagram of an embodiment of a well model of the detection device of the present invention;
fig. 3 shows a schematic view of an embodiment of the seal of the detection device of the present invention.
Wherein the above figures include the following reference numerals:
10. An oil well model; 11. sealing the cavity; 12. a wellhead; 13. positioning holes; 20. a seal; 21. a mounting hole; 30. a polish rod; 40. a pressure measurement assembly; 41. a pressure line; 42. a pressure gauge; 43. a valve; 50. a compression assembly; 51. compressing the cover plate; 52. a connecting screw; 53. a compression nut; 54. adjusting the cushion block; 60. a crank-link mechanism; 70. a counter; 80. a heating assembly; 90. a temperature measuring assembly; 100. and (5) sealing the cover.
Detailed Description
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
In order to solve the problem that the sealing member 20 cannot be replaced in time in the prior art, the invention provides a detection device.
Referring to fig. 1 to 3, the detecting device is used for detecting whether the sealing member 20 is failed, and the detecting device includes: a well model 10, the well model 10 having a seal cavity 11 and a wellhead 12, the seal cavity 11 being in communication with the wellhead 12; a seal 20, the seal 20 is arranged on the wellhead 12 for closing the wellhead 12, wherein, a mounting hole 21 is arranged on the seal 20; a polish rod 30, the polish rod 30 being movably inserted into the mounting hole 21 of the seal member 20 to move relative to the seal member 20; pressure measurement assembly 40, pressure measurement assembly 40 is coupled to well model 10 to measure the pressure within seal cavity 11 as polished rod 30 moves relative to seal 20 and to determine if seal 20 has failed by observing changes in pressure within seal cavity 11.
The invention is used for providing reference for when the sealing element 20 of the wellhead 12 for sealing and adding materials on an actual oil well fails and when the sealing element is replaced optimally, the oil well model 10 is designed for simulating an oil well structure in an actual oil field, the oil well model 10 is provided with a sealing cavity 11 for simulating the actual oil well internal environment, the sealing element 20 is the same as the actual wellhead 12 for sealing and adding materials, a polish rod 30 is inserted into a mounting hole 21 for simulating the polish rod 30 of the oil well in the oil field, when in use, the polish rod 30 is inserted into the mounting hole 21 for reciprocating movement, the sealing cavity 11 is internally provided with a pressure measuring component 40, and since the sealing cavity 11 is provided with liquid capable of generating gas, the pressure in the sealing cavity 11 can be increased after the gas is generated, the pressure measuring component 40 measures the pressure in the sealing cavity 11 to be greater than the pressure outside the oil field, at the moment, the pulling movement of the polish rod 30 can lead the pressure in the sealing cavity 11 to generate great fluctuation, and if the sealing element 20 fails or the sealing cavity 11 is not sealed, the pressure change displayed by the polish rod 30 is not great, and the pressure change displayed by the pressure measuring component 40 is also approximately equal to the atmospheric pressure change outside the oil well, when the sealing element 20 is completely fails, the time can be reasonably estimated, the time can be saved, and the normal working time can be ensured by the sealing element 20 can be replaced.
The pressure measurement assembly 40 includes: a pressure line 41, one end of the pressure line 41 being inserted in an upper portion of the seal chamber 11 to communicate with the seal chamber 11; a pressure gauge 42, the pressure gauge 42 being provided on the pressure line 41 for measuring the pressure in the pressure line 41.
In order to facilitate the observation of the change of the pressure gauge 42 on the pressure measuring assembly 40, and simultaneously facilitate the installation and the disassembly of the pressure gauge 42, in this embodiment, the pressure measuring assembly 40 is led out of the sealing cavity 11, specifically, the pressure measuring assembly 40 includes a pressure pipeline 41, the pressure pipeline 41 can bear high pressure, one end of the pressure pipeline 41 is communicated with the sealing cavity 11, the other end of the pressure pipeline 41 extends out of the sealing cover 100 and is provided with a valve 43 to facilitate the direct unloading of pressure, the pressure gauge 42 is arranged on the pressure pipeline 41 and is positioned on the pressure pipeline 41 outside the sealing cover 100, so as to facilitate the observation and the replacement, and the pressure gauge 42 can know the pressure change in the sealing cavity 11 by detecting the pressure change in the pressure pipeline 41, thereby being very convenient.
The detection device further includes: a hold down assembly 50, the hold down assembly 50 being coupled to the well model 10 for securing the seal 20 at the wellhead 12.
In this embodiment, to facilitate the securement of the seal 20, a hold-down assembly 50 is provided to secure the seal 20 in place on the wellhead 12 of the well model 10 and to completely close the seal cavity 11 by sealing against the wellhead 12.
The hold-down assembly 50 includes: a compression cover plate 51, the compression cover plate 51 being disposed on a side of the seal 20 remote from the wellhead 12; for securing the seal 20 at the wellhead 12; the connecting screw rod 52, the compression cover plate 51 and the oil well model 10 are connected; the compression nut 53, the compression nut 53 is movably sleeved on the connection screw 52 to compress the sealing element 20 at the wellhead 12 by pushing the compression cover plate 51 by adjusting the position on the connection screw 52.
As shown in fig. 1, in this embodiment, the pressing cover plate 51 can change the pressing force on the sealing element 20 by adjusting the position, so that when the sealing element 20 is loosened or not tightly sealed, the pressing cover plate 51 presses the sealing element 20 on the wellhead 12 by adjusting the pressing nut 53, so as to play a role in sealing and adjusting the wellhead 12.
The hold-down assembly 50 further includes: a plurality of adjustment blocks 54, each adjustment block 54 being selectively disposed between the compression cover 51 and the well model 10, wherein the dimensions of each adjustment block 54 are different from each other to correspondingly size the adjustment block 54 according to the different application of pressure to the seal 20.
As shown in fig. 1, the detecting device of the present embodiment is further provided with an adjusting spacer 54, the adjusting spacer 54 being provided between the pressing cover plate 51 and the oil well model 10, and the pressing force applied to the sealing member 20 can be adjusted by changing the thickness of the adjusting spacer 54, thereby adjusting the contact force between the sealing member 20 and the polished rod 30 and the inner step of the oil well model 10.
The oil well model 10 is also internally provided with a positioning hole 13, the positioning hole 13 and the sealing cavity 11 form a stepped hole, and the sealing element 20 is arranged in the positioning hole 13 to seal the wellhead 12.
In order to facilitate the installation of the sealing element 20, the positioning hole 13 is arranged, the sealing cavity 11 is a hole with the radius smaller than that of the positioning hole 13, and the size of the sealing element 20 is larger than that of the wellhead 12, so that the sealing element can be covered on the wellhead 12 comprehensively, and sealing is better.
The detection device further includes: the driving assembly is in driving connection with the polish rod 30 so as to drive the polish rod 30 to do reciprocating linear motion relative to the sealing element 20. The drive assembly includes: a driving motor; the crank link mechanism 60, the crank link mechanism 60 is connected with the driving motor, in order to drive the polished rod 30 to move under the drive of the driving motor.
In this embodiment, in order to facilitate the driving of the polish rod 30 to reciprocate, a crank link mechanism 60 is designed, and the driving motor pushes the polish rod 30 to reciprocate linearly through the crank link mechanism 60, and furthermore, the length of one path of movement of the polish rod 30 can be changed by changing the crank length of the crank link mechanism 60.
The detection device further includes: a counter 70, the counter 70 is used for recording the rotation times of the crank shaft of the crank-link mechanism 60 or the reciprocating times of the polish rod 30.
The number of times of the reciprocating movement of the polish rod 30 with respect to the sealing member 20 during the life of one sealing member 20 is counted by recording the number of times of the crank rotation or the number of revolutions of the driving motor by the counter 70.
The detection device further includes: a heating assembly 80, the heating assembly 80 being connected to the well model 10 for heating the material in the sealed cavity 11; temperature measuring assembly 90. Temperature measuring assembly 90 is disposed within sealed chamber 11 for measuring the temperature within sealed chamber 11.
In order to simulate the environment in an oil well of an oil field conveniently, a heating component 80 is arranged on the outer side of the oil well model 10, the heating component 80 is wrapped on the outer side of the oil well model 10 by adopting a heating sleeve, so that a sealing cavity 11 in the oil well model 10 is heated and warmed, a thermometer is selected as a temperature measuring component 90 for measuring the temperature in the sealing cavity 11, so that the temperature in the sealing cavity 11 is the same as the temperature in the oil well of the oil field in practice, in addition, a reactant for generating gas is further arranged in the sealing cavity 11, and the generated gas simulates the pressure in the oil well by increasing the pressure in the sealing cavity 11.
The detection device further includes: the oil well model 10, the sealing piece 20 and the polished rod 30 are arranged in the sealing cover 100, so that interference of the external environment to the detection device is isolated.
From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:
The invention provides a detection device for evaluating sealing performance and service life of sealing filler of a wellhead 12 of an oil production well, which mainly comprises the following components: the device comprises a valve 43, a pressure gauge 42, a sealing cover 100, a compression cover plate 51, a pressure pipeline 41, a heating assembly 80, a sealing cavity 11, an oil well model 10, a liquid medium, a thermometer, acid gas, a sealing element 20, an adjusting cushion block 54, a connecting screw 52, a polished rod 30, a crank-link mechanism 60, a rotating hinge, a crank, a motor, a counter 70 and a shoulder, wherein the crank, the rotating hinge, the crank-link mechanism and the polished rod form a crank-slider mechanism, the motor is started, the crank drives the polished rod 30 which is tightly attached to a mounting hole 21 of the sealing element 20 to do reciprocating linear motion along the axis thereof, the process of the polished rod for wearing the sealing element 20 back and forth under actual working conditions is simulated, the crank rotates for one circle along the rotating track, the polished rod 30 reciprocates along the axis thereof for exactly simulating one stroke of the actual polished rod and the plunger, and the single contact length between the sealing element 20 and the polished rod 30 and the abrasion degree thereof can be changed by changing the length of the crank; a seal 20 composed of special rubber or graphite packing material is located between the shoulder of the oil well model 10 and the compression cover plate 51, and the shoulder of the oil well model 10 and the compression cover plate 51 are connected by a connecting screw 52; the cover plate 51 is pressed by the connecting screw 52 in the connecting process, so that the inner wall of the mounting hole 21 on the sealing element 20 firmly holds the polished rod 30 tightly, the lower end surface of the sealing element 20 is tightly combined with the shoulder surface of the oil well model 10, and the sealing between the sealing element 20 and the polished rod 30 and the shoulder surface is realized; the pressing force applied to the seal 20 can be adjusted by changing the thickness of the adjustment spacer 54, thereby adjusting the contact force between the seal 20 and the polished rod 30 and the shoulder surface of the oil well model 10; the seal cavity 11 consists of an oil well model 10, a seal element 20, a polished rod 30, a pressure pipeline, a thermometer, a pressure gauge and a valve 43, wherein a liquid medium and acid gas (such as CO2 and H2S) are filled in the seal cavity 11, the thermometer is used for measuring the temperature of the liquid medium in the seal cavity 11, and the pressure gauge 42 is used for measuring the pressure in the seal cavity 11; the heating component 80 is used for heating the liquid medium in the oil well model 10 and the sealing cavity 11; the counter 70 is used for recording the reciprocating times and time of the polish rod 30; the entire reaction device is fixed in the sealing cover 100, and the eccentric wear of the polish rod 30 on the sealing piece 20 can be realized by adjusting the relative positions of the packing chamber and the motor.
According to the invention, the contact pressure between the sealing element 20 and the polished rod 30 when the sealing element 20 is under compression load and worn under actual working conditions can be simulated in the extrusion process of the compression cover plate 51, the heating assembly 80 adopts the heating sleeve, and the heating sleeve and the sealing cavity 11 are filled with liquid medium and acid gas so as to simulate the high temperature and corrosion environment of the sealing element 20 under the actual working conditions, thereby realizing the sealing performance evaluation of the sealing element 20 under the combined actions of high temperature, corrosion and wear under different compression loads and wear contact pressures.
The reading of the pressure gauge 42 is in a fluctuation state in the up-and-down reciprocating motion process of the polish rod 30, but when the reading of the pressure gauge 42 deviates from balance and descends, the sealing failure of the sealing element 20 is indicated, and the number of times, time and service life of the reciprocating motion of the polish rod 30 when the sealing failure is recorded on the counter 70.
The detection device can be used for testing and evaluating the sealing performance and the service life of the wellhead sealing filler under the combined actions of high temperature, corrosion and abrasion under different compression loads and abrasion contact pressures, and accurately acquiring the sealing performance and the service life of the wellhead sealing filler under different working conditions.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface on … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A detection device for detecting whether a seal (20) has failed, the detection device comprising:
-a well model (10), the well model (10) having a sealed cavity (11) and a wellhead (12), the sealed cavity (11) being in communication with the wellhead (12);
-a seal (20), the seal (20) being arranged on the wellhead (12) for closing the wellhead (12), wherein the seal (20) is provided with a mounting hole (21);
-a polish rod (30), said polish rod (30) being movably inserted in a mounting hole (21) of said seal (20) to move with respect to said seal (20);
a pressure measurement assembly (40), the pressure measurement assembly (40) being connected to the well model (10) to measure the pressure within the seal cavity (11) as the polished rod (30) moves relative to the seal (20) and to determine whether the seal (20) fails by observing changes in the pressure within the seal cavity (11);
the sealing cavity (11) is also internally provided with a reactant for generating gas so as to increase the pressure in the sealing cavity (11) and simulate the pressure in an oil well.
2. The detection device according to claim 1, wherein the pressure measuring assembly (40) comprises:
a pressure line (41), one end of the pressure line (41) being inserted in an upper portion of the seal chamber (11) so as to communicate with the seal chamber (11);
-a pressure gauge (42), the pressure gauge (42) being arranged on the pressure line (41) for measuring the pressure within the pressure line (41).
3. The detection apparatus according to claim 1, characterized in that the detection apparatus further comprises:
-a hold-down assembly (50), the hold-down assembly (50) being connected to the well model (10) for securing the seal (20) at the wellhead (12).
4. A testing device according to claim 3, wherein the compression assembly (50) comprises:
A gland plate (51), the gland plate (51) being disposed on a side of the seal (20) remote from the wellhead (12); for securing the seal (20) at the wellhead (12);
-a connecting screw (52), the connecting screw (52) and the compression cover plate (51) being connected to both the well model (10);
And the compression nut (53) is movably sleeved on the connecting screw (52) so as to compress the sealing piece (20) at the wellhead (12) by pushing the compression cover plate (51) through adjusting the position on the connecting screw (52).
5. The device according to claim 4, wherein the compacting assembly (50) further comprises:
And a plurality of adjusting pads (54), each adjusting pad (54) being disposed between the compression cover plate (51) and the oil well model (10), wherein the sizes of each adjusting pad (54) are different from each other so as to select the corresponding size of the adjusting pad (54) according to the difference of the pressure applied to the sealing element (20).
6. The detection device according to claim 4, wherein a positioning hole (13) is further formed in the oil well model (10), the positioning hole (13) and the sealing cavity (11) form a stepped hole, and the sealing element (20) is arranged in the positioning hole (13) so as to seal off the wellhead (12).
7. The detection apparatus according to claim 1, characterized in that the detection apparatus further comprises:
the driving assembly is in driving connection with the polish rod (30) so as to drive the polish rod (30) to do reciprocating linear motion relative to the sealing piece (20).
8. The detection apparatus according to claim 7, wherein the drive assembly comprises:
A driving motor;
And the crank connecting rod mechanism (60) is connected with the driving motor so as to drive the polish rod (30) to move under the drive of the driving motor.
9. The detection apparatus according to claim 8, characterized in that the detection apparatus further comprises:
And the counter (70) is used for recording the rotation times of the crank shaft of the crank-link mechanism (60) or the reciprocating times of the polish rod (30).
10. The detection apparatus according to claim 1, characterized in that the detection apparatus further comprises:
-a heating assembly (80), the heating assembly (80) being connected to the well model (10) for heating the material in the sealed cavity (11);
And the temperature measuring component (90) is arranged in the sealing cavity (11) and used for measuring the temperature in the sealing cavity (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011045088.0A CN114323482B (en) | 2020-09-28 | 2020-09-28 | Detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011045088.0A CN114323482B (en) | 2020-09-28 | 2020-09-28 | Detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114323482A CN114323482A (en) | 2022-04-12 |
| CN114323482B true CN114323482B (en) | 2024-08-27 |
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| CN203785855U (en) * | 2014-04-16 | 2014-08-20 | 中国矿业大学 | Experimental device for testing reciprocating compressor piston rod sealing filler gas tightness |
| CN209908493U (en) * | 2019-02-18 | 2020-01-07 | 中国石油天然气股份有限公司 | Wellhead sealing detection device and detection system |
| CN111174985A (en) * | 2020-01-10 | 2020-05-19 | 华东理工大学 | Filler sealing performance detection device |
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| CN201203573Y (en) * | 2008-05-30 | 2009-03-04 | 中国石油集团川庆钻探工程有限公司 | Performance detection device of non-metallic material in mixed hydrocarbon gas |
| CN202974579U (en) * | 2012-12-27 | 2013-06-05 | 东营胜利高原有限公司 | Pressure testing device for oil well packing box |
| RU176941U1 (en) * | 2017-07-24 | 2018-02-02 | Акционерное общество "Иркутский научно-исследовательский и конструкторский институт химического и нефтяного машиностроения" (АО "ИркутскНИИхиммаш") | STAND FOR TEST SEALING SEALS |
| CN110132499B (en) * | 2019-05-16 | 2020-06-09 | 中国海洋石油集团有限公司 | Method for testing reliability of bidirectional dynamic seal of deep sea valve rod |
| CN209979167U (en) * | 2019-06-03 | 2020-01-21 | 宜昌奥佳新材料科技有限公司 | Sealing test system |
| CN110657980B (en) * | 2019-11-01 | 2022-01-04 | 银川塞昊橡胶有限公司 | Oil well head packing sealing performance test system |
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| CN203785855U (en) * | 2014-04-16 | 2014-08-20 | 中国矿业大学 | Experimental device for testing reciprocating compressor piston rod sealing filler gas tightness |
| CN209908493U (en) * | 2019-02-18 | 2020-01-07 | 中国石油天然气股份有限公司 | Wellhead sealing detection device and detection system |
| CN111174985A (en) * | 2020-01-10 | 2020-05-19 | 华东理工大学 | Filler sealing performance detection device |
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