CN114323482A - Detection device - Google Patents
Detection device Download PDFInfo
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- CN114323482A CN114323482A CN202011045088.0A CN202011045088A CN114323482A CN 114323482 A CN114323482 A CN 114323482A CN 202011045088 A CN202011045088 A CN 202011045088A CN 114323482 A CN114323482 A CN 114323482A
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- sealing
- wellhead
- pressure
- sealing element
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- 238000001514 detection method Methods 0.000 title claims abstract description 36
- 238000007789 sealing Methods 0.000 claims abstract description 153
- 239000003129 oil well Substances 0.000 claims abstract description 48
- 230000008859 change Effects 0.000 claims abstract description 13
- 238000003825 pressing Methods 0.000 claims description 26
- 238000010438 heat treatment Methods 0.000 claims description 18
- 230000006835 compression Effects 0.000 claims description 15
- 238000007906 compression Methods 0.000 claims description 15
- 230000007246 mechanism Effects 0.000 claims description 14
- 125000006850 spacer group Chemical group 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 2
- 238000005056 compaction Methods 0.000 claims 1
- 210000004907 gland Anatomy 0.000 claims 1
- 239000003921 oil Substances 0.000 description 19
- 239000000945 filler Substances 0.000 description 13
- 238000005299 abrasion Methods 0.000 description 12
- 238000012856 packing Methods 0.000 description 12
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- 238000000034 method Methods 0.000 description 6
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 239000010779 crude oil Substances 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 239000003566 sealing material Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000010795 Steam Flooding Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
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- 206010063493 Premature ageing Diseases 0.000 description 1
- 208000032038 Premature aging Diseases 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
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- 238000009434 installation Methods 0.000 description 1
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- 239000000314 lubricant Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
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- 238000011084 recovery Methods 0.000 description 1
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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 well head, and the sealing cavity is communicated with the well head; the sealing element is arranged on the wellhead and used for sealing the wellhead, wherein the sealing element is provided with a mounting hole; 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 to measure the pressure in the sealing cavity when the polish rod moves relative to the sealing element, and whether the sealing element fails or not is judged by observing the change of the pressure in the sealing cavity. The detection device solves the problem that the 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 heavy oil recovery mode mainly takes steam huff and puff and steam flooding, such as 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 purpose of extraction is achieved. However, because the heavy oil reservoir has the characteristics of heavy oil, high pressure, high temperature, CO 2-containing acidic corrosive media and the like, the leakage of the wellhead sealing filler and the device is easily caused by the influence of the temperature, viscosity, corrosive media, water-containing oil extraction rod abrasion and the like of the produced fluid of the heavy oil well along with the prolonging of the production time, and the problem is always solved. Although a great deal of research work is also done in these years to replace various types of wellhead packing and devices, the problem is not solved fundamentally. The phenomenon that well head oil leakage is caused by well head sealing filler and device leakage still happens occasionally, in the field production process, the service cycle of the packing boxes used at present is different in length, and the average service cycle is about one week. Therefore, the frequent replacement of the sealing packing and the like not only affects the oil extraction rate of the pumping well, causes the waste of manpower, material resources and resources, but also greatly increases the labor intensity of workers and causes the environmental pollution of the oil field.
The research finds that: the main reasons for sealing failure and leakage of wellhead sealing filler and device are as follows: the abrasion of the field oil pumping polished rod and the sealing filler, the corrosion of an acidic medium, high temperature, the compression load of the sealing filler and the combined action thereof and the like. For example, the high temperature action tends to cause premature aging of the wellhead packing seal; when the oil pumping polished rod reciprocates in the wellhead sealing filler, the polished rod is corroded by acid and has a rough surface, so that the wellhead sealing filler is easily abraded, particularly eccentric abrasion is easily caused, statistics shows that the frequency of oil leakage caused by the eccentric abrasion is high, and according to statistics, oil leakage starts after the eccentric abrasion is generated for 5-7 d (2-3 d in serious cases), 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 dry-ground, so that the polish rod is easy to generate heat and blacken, and the abrasion of the polish rod is accelerated; when the water content of the oil well production liquid is more than 74.02%, the produced liquid is changed into phase, the oil-in-oil type is changed into the oil-in-water type, the friction lubricant is changed from crude oil into produced water, and the abrasion is serious because the lubrication effect of the crude oil is lost. More importantly, the service cycle of the on-site wellhead sealing filler (mainly comprising special rubber, graphite packing and the like) is not clear, and on-site tracking investigation finds that staff cannot replace the packing after the packing has leaked, or replace the packing too early, the sealing performance and the service life of the wellhead sealing filler under different working conditions cannot be accurately obtained, and the waste of the sealing filler is caused.
Disclosure of Invention
The invention mainly aims to provide a detection device to solve 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 sensing device for sensing whether a seal is failed, the sensing device comprising: the oil well model is provided with a sealing cavity and a well head, and the sealing cavity is communicated with the well head; the sealing element is arranged on the wellhead and used for sealing the wellhead, wherein the sealing element is provided with a mounting hole; 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 to measure the pressure in the sealing cavity when the polish rod moves relative to the sealing element, and whether the sealing element fails or not is judged by observing the change of the pressure in the sealing cavity.
Further, the load cell assembly includes: one end of the pressure pipeline is inserted in the upper part of the sealing cavity so as to be communicated with the sealing cavity; and the pressure gauge is arranged on the pressure pipeline and used for measuring the pressure in the pressure pipeline.
Further, the detection device further comprises: and the compression assembly is connected with the oil well model and is used for fixing the sealing element 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 rod is connected with the pressing cover plate and the oil well model; the compression nut is movably sleeved on the connecting screw rod to push the compression cover plate 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 adjusting blocks, each of which is selectively disposed between the pressing cover plate and the well model, wherein sizes of the adjusting blocks are different from each other, so that the adjusting blocks are selected to be correspondingly sized according to different pressures applied to the sealing member.
Furthermore, a positioning hole is further formed in the oil well model, a stepped hole is formed between the positioning hole and the sealing cavity, and the sealing element is arranged in the positioning hole to plug a well mouth.
Further, the detection device further comprises: and 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 element.
Further, the drive assembly includes: the crank connecting rod mechanism is connected with the driving motor so as to drive the polished rod to move under the driving of the driving motor.
Further, the detection device further comprises: and the counter is used for recording the rotation times of the crankshaft of the crank connecting rod mechanism or the reciprocating times of the polished rod.
Further, the detection device further comprises: the heating assembly is connected with the oil well model and used for heating the material in the sealing cavity; and the temperature measuring component 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 of the invention is used for providing reference for the failure of a sealing element of wellhead sealing material adding on an actual oil well and the optimal replacement time, the detection device designs an oil well model for simulating the 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 sealing material of the actual wellhead sealing material, a polished rod is inserted in a mounting hole for simulating the polished rod of the oil well in the oil field, when in use, the polished rod is inserted in the mounting hole for reciprocating motion, a pressure measuring assembly is arranged in the sealing cavity, the pressure in the sealing cavity is increased after gas is generated due to the liquid capable of generating gas in the sealing cavity, so that the pressure in the sealing cavity is measured by the pressure measuring assembly to be higher than the pressure outside the oil field, and at the moment, the pressure in the sealing cavity is greatly fluctuated due to the pulling motion of the polished rod, if the sealing element fails or the sealing cavity is not sealed tightly, the pressure change displayed by the pressure measuring assembly is not large when the polish rod is pulled, and the pressure value is approximately equal to the atmospheric pressure outside the oil well, so that the failure time of the sealing element can be estimated through the pressure change of the pressure measuring assembly, and the replacement time of the sealing element 20 can be reasonably judged according to the failure time, so that the normal work of the oil well can be ensured, and the consumption of the sealing element can be saved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 shows a cross-sectional view of an embodiment of a detection device according to the present invention;
FIG. 2 shows a schematic view of a well model embodiment of the detection apparatus of the present invention;
figure 3 shows a schematic view of an embodiment of the seal of the detection device of the present invention.
Wherein the figures include the following reference numerals:
10. an oil well model; 11. sealing the cavity; 12. a wellhead; 13. positioning holes; 20. a seal member; 21. mounting holes; 30. a polish rod; 40. a pressure measuring assembly; 41. a pressure line; 42. a pressure gauge; 43. a valve; 50. a compression assembly; 51. pressing the cover plate; 52. connecting a screw rod; 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 component; 100. and (6) sealing the cover.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to solve the problem that the sealing element 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 fails, and the detecting device includes: the oil well model 10 is characterized in that the oil well model 10 is provided with a seal cavity 11 and a well head 12, and the seal cavity 11 is communicated with the well head 12; a seal 20, the seal 20 being disposed on the wellhead 12 for closing the wellhead 12, wherein the seal 20 is provided with a mounting hole 21; a polish rod 30 movably inserted in the mounting hole 21 of the sealing member 20 to move relative to the sealing member 20; and a load cell 40, wherein the load cell 40 is connected with the oil well model 10 to measure the pressure in the sealed cavity 11 when the polish rod 30 moves relative to the sealing member 20, and judge whether the sealing member 20 fails or not by observing the change of the pressure in the sealed cavity 11.
The detection device of the invention is used for providing reference for the time when the sealing element 20 of the wellhead 12 sealing feeding on the actual oil well fails and the time when the sealing element 20 is optimally replaced, the detection device designs an oil well model 10 for simulating the oil well structure in the actual oil field, the oil well model 10 is provided with a sealing cavity 11 for simulating the real oil well internal environment, the sealing element 20 is the same as the sealing and filling material of the actual wellhead 12, 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 motion, a pressure measuring assembly 40 is arranged in the sealing cavity 11, the pressure in the sealing cavity 11 is increased after the gas is generated due to the liquid capable of generating the gas in the sealing cavity 11, so that the pressure measuring assembly 40 measures that the pressure in the sealing cavity 11 is greater than the pressure outside the oil field, at the moment, the pressure in the sealing cavity 11 is greatly fluctuated due to the drawing motion of the polish rod 30, if the sealing element 20 fails or the sealing cavity 11 is not tightly sealed, the pressure change fluctuation displayed by the pressure measuring assembly 40 is not large when the polished rod 30 is drawn, and the pressure value is approximately equal to the atmospheric pressure outside the oil well, so the failure time of the sealing element 20 can be estimated through the pressure change of the pressure measuring assembly 40, the replacement time of the sealing element 20 can be reasonably judged according to the failure time, the normal work of the oil well can be ensured, and the consumption of the sealing element 20 can be saved.
The load cell assembly 40 includes: a pressure line 41, one end of the pressure line 41 being inserted in an upper portion of the hermetic chamber 11 to communicate with the hermetic chamber 11; a pressure gauge 42, the pressure gauge 42 being arranged on the pressure line 41 for measuring the pressure in the pressure line 41.
In order to facilitate the change of observing manometer 42 on pressure measuring unit 40, can make things convenient for manometer 42's installation and dismantlement simultaneously, lead out sealed chamber 11 with pressure measuring unit 40 in this embodiment outside, it is specific, pressure measuring unit 40 includes pressure pipeline 41, pressure pipeline 41 can bear the high pressure, pressure pipeline 41 one end and sealed chamber 11 intercommunication, the other end stretches out the sealed cowling 100 outside and is equipped with valve 43, in order to make things convenient for direct uninstallation pressure, manometer 42 sets up on this pressure pipeline 41, and be located the pressure pipeline 41 in the sealed cowling 100 outside, in order to observe and change, manometer 42 can know the pressure change in the sealed chamber 11 through the pressure change that detects in the pressure pipeline 41, and is very convenient.
The detection device further comprises: a hold down assembly 50, the hold down assembly 50 being connected to the well module 10 for securing the seal 20 at the wellhead 12.
In this embodiment, to facilitate the retention of the seal 20, a hold-down assembly 50 is provided to retain the seal 20 in place on the wellhead 12 of the well pattern 10 and to completely seal the seal chamber 11 by sealing against the wellhead 12.
The hold-down assembly 50 includes: a hold-down cover plate 51, the hold-down 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 is connected with the pressing cover plate 51 and the oil well model 10; and the compression nut 53 is movably sleeved on the connecting screw rod 52, so that the compression cover plate 51 is pushed to compress the sealing element 20 at the wellhead 12 by adjusting the position on the connecting screw rod 52.
As shown in fig. 1, in the present 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 loose or loose, the pressing cover plate 51 presses the sealing element 20 at the wellhead 12 by adjusting the pressing nut 53, thereby performing the sealing adjustment function on the wellhead 12, and when the adjustment is performed, one end of the connecting screw 52 is in threaded connection with the well model 10, the other end is in threaded connection with the pressing cover plate 51, the pressing nut 53 is located at the end of the pressing cover plate 51 away from the well model 10, the pressing nut 53 is rotated to push the pressing cover plate 51 to press the sealing element 20, and the pressing cover plate 51 presses the sealing element 20 at the wellhead 12 to seal the seal cavity 11 under the push of the pressing nut 53.
The hold down assembly 50 further includes: a plurality of setting blocks 54, each setting block 54 being selectively provided between the pressing cover plate 51 and the well model 10, wherein the sizes of the setting blocks 54 are different from each other to select the setting block 54 correspondingly according to the difference in the pressure applied to the sealing member 20.
As shown in fig. 1, the detecting apparatus of the present embodiment is further provided with a spacer 54, the spacer 54 is disposed between the pressing cover plate 51 and the well model 10, and the pressing force applied to the sealing member 20 can be adjusted by changing the thickness of the spacer 54, thereby adjusting the contact force between the sealing member 20 and the polish rod 30 and the step in the well model 10.
The oil well model 10 is also provided with a positioning hole 13, the positioning hole 13 and the sealing cavity 11 form a stepped hole, and a sealing element 20 is arranged in the positioning hole 13 to seal the well mouth 12.
In order to install the sealing element 20, a positioning hole 13 is arranged, the sealing cavity 11 is a hole with a 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 completely cover the wellhead 12 and is better in sealing.
The detection device further comprises: and the driving assembly is in driving connection with the polished rod 30 so as to drive the polished rod 30 to perform reciprocating linear motion relative to the sealing element 20. The drive assembly includes: a drive motor; the crank link mechanism 60, the crank link mechanism 60 is connected with the driving motor to drive the polished rod 30 to move under the driving of the driving motor.
In this embodiment, in order to facilitate the reciprocating movement of the polished rod 30, a crank link mechanism 60 is provided, and the drive motor drives the polished rod 30 to reciprocate linearly through the crank link mechanism 60, and further, the length of one path of the polished rod 30 can be changed by changing the length of the crank link mechanism 60.
The detection device further comprises: and a counter 70, wherein the counter 70 is used for recording the rotation times of the crankshaft of the crank connecting rod mechanism 60 or recording the reciprocating times of the polished rod 30.
The number of revolutions of the crank or the number of revolutions of the drive motor is recorded by the counter 70 to count the number of reciprocations of the polish rod 30 relative to the seal 20 over the life of one seal 20.
The detection device further comprises: the heating assembly 80 is connected with the oil well model 10 and used for heating the material in the sealed cavity 11; and the temperature measuring component 90 is arranged in the sealed cavity 11 and used for measuring the temperature in the sealed cavity 11.
In order to simulate the environment in the oil well of the oil field conveniently, heating assembly 80 is arranged on the outer side of the oil well model 10, heating assembly 80 is wrapped on the outer side of the oil well model 10 by a heating sleeve, thereby heating and warming up the sealing cavity 11 inside the oil well model 10, a temperature measuring assembly 90 selects a thermometer 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 generating gas is also 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 comprises: the oil well model detection device comprises a sealing cover 100, wherein a sealing space is arranged in the sealing cover 100, and the oil well model 10, a sealing element 20 and a polished rod 30 are arranged in the sealing space so as to isolate the interference of the external environment on the detection device.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:
the invention provides a detection device for evaluating the sealing performance and the service life of a sealing filler of a wellhead 12 of an oil production well, which mainly comprises: valve 43, pressure gauge 42, sealing cover 100, pressing cover plate 51, pressure pipeline 41, heating component 80, sealing cavity 11, oil well model 10, liquid medium, thermometer, acid gas, sealing element 20, adjusting cushion block 54, connecting screw 52, polish rod 30, crank link mechanism 60, rotating hinge, crank, motor, counter 70, shoulder, wherein, the crank, the rotating hinge, the crank connecting rod mechanism and the polish rod form a crank sliding block mechanism, the motor is started, the crank drives the polish rod 30 tightly attached to the mounting hole 21 of the sealing element 20 to do reciprocating linear motion along the axis, the process that the sucker rod wears the sealing element 20 back and forth under the actual working condition is simulated, wherein the crank rotates a circle along the rotating track, the polish rod 30 reciprocates once along the axis thereof, just simulates one stroke of the actual sucker rod and plunger, the length of the single contact between the sealing member 20 and the polish rod 30 and the degree of wear thereof can be changed by changing the length of the crank; the sealing element 20 made of special rubber or graphite packing material is positioned between the shoulder of the oil well model 10 and the pressing cover plate 51, and the shoulder of the oil well model 10 and the pressing cover plate 51 are connected through a connecting screw rod 52; the pressing cover plate 51 presses the sealing element 20 in the connection process of the connecting screw rod 52, so that the inner wall of the mounting hole 21 on the sealing element 20 firmly holds the polish rod 30, the lower end face of the sealing element 20 is tightly combined with the shoulder surface of the oil well model 10, and meanwhile, the sealing element 20 is sealed with the polish rod 30 and the shoulder surface; the pressing force applied to the sealing member 20 can be adjusted by changing the thickness of the adjusting pad 54, thereby adjusting the contact force between the sealing member 20 and the polish rod 30 and the shoulder surface of the well model 10; the sealed cavity 11 is composed of an oil well model 10, a sealing element 20, a polish rod 30, a pressure pipeline, a thermometer, a pressure gauge and a valve 43, a liquid medium and an acid gas (such as CO2 and H2S) are filled in the sealed cavity 11, the thermometer is used for measuring the temperature of the liquid medium in the sealed cavity 11, and the pressure gauge 42 is used for measuring the pressure in the sealed cavity 11; the heating assembly 80 is used for heating the oil well model 10 and the liquid medium in the sealed cavity 11; the counter 70 is used for recording the reciprocating times and time of the polish rod 30; the whole reaction device is fixed in the sealing cover 100, and eccentric wear of the polish rod 30 to the sealing element 20 can be realized by adjusting the relative position of the packing chamber and the motor.
The sealing element 20 can simulate the compression load of the sealing element 20 under the actual working condition and the contact pressure between the sealing element 20 and the polished rod 30 during abrasion in the process of pressing the cover plate 51, the heating assembly 80 adopts a heating sleeve, and the heating sleeve and the sealing cavity 11 are filled with liquid media and acidic gas to simulate the high-temperature and corrosive environment of the sealing element 20 under the actual working condition, so that the sealing performance evaluation of the sealing element 20 under the combined action of high temperature, corrosion and abrasion under different compression loads and abrasion contact pressures can be realized.
The reading of the pressure gauge 42 is in a fluctuation state in the process of the up-and-down reciprocating motion of the polish rod 30, but when the reading of the pressure gauge 42 deviates from balance and falls, the sealing failure of the sealing element 20 is indicated, and the reciprocating times, the time and the service life of the polish rod 30 when the sealing failure occurs are 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 action 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 example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship 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 of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. 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 (10)
1. A detection device for detecting whether a seal (20) has failed, characterized in that it comprises:
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) 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), the polish rod (30) being movably inserted into the mounting hole (21) of the sealing member (20) to move relative to the sealing member (20);
a load cell assembly (40), the load cell assembly (40) being connected to the well model (10) to measure the pressure within the sealed chamber (11) as the polish rod (30) moves relative to the seal (20), and to determine whether the seal (20) has failed by observing a change in pressure within the sealed chamber (11).
2. The detection apparatus according to claim 1, wherein the load cell 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) 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 device according to claim 1, further comprising:
a hold-down assembly (50), the hold-down assembly (50) being connected with the well pattern (10) for securing the seal (20) at the wellhead (12).
4. The detection device according to claim 3, characterized in that said pressing assembly (50) comprises:
a hold-down cover plate (51), the hold-down 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 connecting screw rod (52) and the compaction cover plate (51) are connected with the oil well model (10);
a compression nut (53), the compression nut (53) movably sleeved on the connecting screw rod (52) to push the compression cover plate (51) to compress the sealing element (20) at the wellhead (12) by adjusting the position on the connecting screw rod (52).
5. The detection apparatus according to claim 4, wherein the compression assembly (50) further comprises:
a plurality of spacer blocks (54), each spacer block (54) being selectively arranged between the gland plate (51) and the well pattern (10), wherein the size of each spacer block (54) is different from each other to select the spacer block (54) with corresponding size according to different pressure applied to the seal (20).
6. The testing device according to claim 4, characterized in that a positioning hole (13) is further provided in the well pattern (10), the positioning hole (13) forming a stepped hole with the seal cavity (11), the seal (20) being provided in the positioning hole (13) to seal off the well head (12).
7. The detection device according to claim 1, further comprising:
the drive assembly is in drive connection with the polish rod (30) to drive the polish rod (30) to perform reciprocating linear motion relative to the sealing element (20).
8. The detection device of claim 7, wherein the drive assembly comprises:
a drive motor;
the crank connecting rod mechanism (60) is connected with the driving motor, and the polished rod (30) is driven by the driving motor to move.
9. The detection device according to claim 8, further comprising:
a counter (70), the counter (70) is used for recording the rotation times of the crankshaft of the crank connecting rod mechanism (62) or recording the reciprocating times of the polish rod (30).
10. The detection device according to claim 1, further comprising:
a heating assembly (80), the heating assembly (80) being connected to the well model (10) for heating the material in the sealed chamber (11);
the temperature measuring component (90) is arranged in the sealed cavity (11) and used for measuring the temperature in the sealed cavity (11).
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| CN117490947A (en) * | 2024-01-03 | 2024-02-02 | 胜利油田东强机电设备制造有限公司 | Polished rod sealing effect pressure measuring device |
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| CN114323482B (en) | 2024-08-27 |
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