CN110987326B - Experimental device for evaluating sealing capacity of packer rubber barrel - Google Patents
Experimental device for evaluating sealing capacity of packer rubber barrel Download PDFInfo
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- CN110987326B CN110987326B CN201911403334.2A CN201911403334A CN110987326B CN 110987326 B CN110987326 B CN 110987326B CN 201911403334 A CN201911403334 A CN 201911403334A CN 110987326 B CN110987326 B CN 110987326B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2853—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipe joints or seals
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses an experimental device for evaluating the sealing capacity of a packer rubber cylinder, which comprises a setting cylinder, an outer cylinder and a heating box, wherein the setting cylinder is sleeved in the outer cylinder, the bottom end of the setting cylinder is inserted into a recess sunken in the center of a base of the outer cylinder, the upper end of the setting cylinder is fixed at the top of the outer cylinder through a setting cover, the middle part of the setting cylinder is sleeved with the rubber cylinder to be detected, the rubber cylinder is arranged in a rubber cylinder detection area, the setting cylinder is respectively provided with a setting channel from the top to the bottom and a rubber cylinder lower seal detection channel from the top to a lower setting block, the setting cover is provided with a rubber cylinder upper seal detection channel from the top to the rubber cylinder, and the rubber cylinder lower seal detection channel and the rubber cylinder upper seal detection channel are both communicated with the rubber cylinder detection area. The invention has simple and reliable operation, and can simulate the influence of the upper and lower seal checking channels on the pressure difference change and temperature of the packer rubber cylinder under the high-temperature and high-pressure setting environment, thereby evaluating and analyzing the sealing capacity of the packer rubber cylinder, and the like.
Description
Technical Field
The invention belongs to the technical field of packer sealing, and particularly relates to an experimental device for evaluating the sealing capacity of a packer rubber barrel.
Background
The geological conditions of deep reservoirs in the basin of Origong in south China sea are complex, and the basin is one of high-temperature and high-pressure areas on three seas in the world. Along with the continuous deepening of the high-temperature and high-pressure oil and gas exploration degree of the origanum basin, the bottom hole temperature is over 200 ℃, the bottom hole pressure is over 100MPa, the south sea origanum has taken a step in the offshore ultra-high temperature and high pressure exploration field, and the ultra-high temperature and high pressure environment has extremely high requirements for testing the packer. The rubber sleeve is a core component of the packer, and the quality of the sealing performance of the rubber sleeve in a high-temperature and high-pressure environment directly determines whether the test operation is successful. Due to the fact that the ultra-high temperature and high pressure test working condition is complex, the high pressure causes the stress of the packer rubber to be complex, the high temperature easily causes the sealing failure of the packer rubber, the pressure difference between the upper part and the lower part of the packer rubber also changes constantly under the interaction of the high temperature and the high pressure, the rubber is easy to fatigue, the packer rubber is easy to leak and fail under the condition of the ultra-high temperature and the high pressure, in the early period of testing the high temperature and the high pressure well of the Yingqiong basin, the complex condition of the sealing failure of the packer rubber is frequent, geological data cannot be obtained, and the exploration and development process of the Yingqiong basin in south China sea is greatly influenced.
Therefore, before the ultrahigh temperature and high pressure test operation, the sealing performance of the rubber sleeve of the downhole packer under the high temperature and high pressure environment needs to be evaluated through a reasonable and strict sealing performance detection technology or method, the on-site test working condition is required to be simulated as much as possible to detect the rubber sleeve of the packer, and no suitable method or device exists for the detection and evaluation of the sealing capacity of the packer under the ultrahigh temperature and high pressure environment at present.
Disclosure of Invention
The invention aims to provide an experimental device for evaluating the sealing capacity of a packer rubber cylinder, which is simple and reliable to operate and can simulate the analysis and evaluation of the sealing performance of the packer rubber cylinder in a high-temperature and high-pressure setting environment.
In order to solve the technical problems, the invention adopts the technical scheme that:
the utility model provides an experimental apparatus for evaluation packer packing element sealing ability, includes sits a set, urceolus and heating cabinet, sit a set cover and establish in the urceolus, during the recess that urceolus base central authorities invaginate was inserted to its bottom, the top of urceolus is fixed through sitting the closing cap in the upper end, the middle part cover of sitting a set is equipped with the packing element that waits to detect, the packing element is arranged in the packing element detection zone, sit a set and be equipped with respectively from the top to the seat passageway of bottom and from the top to the packing element of seat piece down and test the passageway, sit the closing cap and be equipped with from its top to be equipped with the packing element between the packing element and test the passageway, the packing element is tested the passageway down and all is linked together with the packing element detection zone on the packing element, the urceolus sets up in the confined heating cabinet.
And one setting channel, one lower seal checking channel of the rubber cylinder and one upper seal checking channel of the rubber cylinder are arranged.
The setting cylinder is divided into an upper section, a middle section and a lower section, the diameter of the setting cylinder decreases gradually in a ladder shape from large to small, the diameter of the lower section is consistent with the inner diameter of the outer cylinder, the diameter of the middle section is smaller than the inner diameter of the outer cylinder, a rubber cylinder detection area is formed by the diameter of the lower section and the inner diameter of the middle section, a rubber cylinder to be detected is arranged in the rubber cylinder detection area, and the diameter of the upper section is consistent with the inner diameter of the upper end of the setting cover.
The setting cylinder and the outer cylinder are coaxial solid bodies, and scales are marked on the upper section of the setting cylinder from the top to the bottom.
The upper side and the lower side of the rubber barrel detection area are respectively provided with an upper setting block and a lower setting block, the lower side of the lower setting block is provided with a group of first high-temperature sealing elements, the upper side of the upper setting block is provided with two groups of second high-temperature sealing elements, the first high-temperature sealing elements are arranged between the setting barrel and the outer barrel, and the lower setting block is respectively arranged between the setting cover and the setting barrel and between the setting cover and the outer barrel.
The bottom of the heating box is provided with an electric heating pipe, and the side wall of the heating box is symmetrically provided with thermometers.
The top of the setting channel is provided with a hydraulic system interface, and an outlet at the bottom of the setting channel is connected with a groove which is sunken in the outer barrel.
The top of the rubber cylinder lower seal checking channel is provided with a hydraulic system interface, and an outlet at the bottom of the rubber cylinder lower seal checking channel is connected with an outlet of the lower setting block.
The rubber cylinder is provided with a seal checking channel, the top of the seal checking channel is provided with a hydraulic system interface, and the bottom outlet of the seal checking channel is connected with the outlet of the upper setting block.
Compared with the prior art, the invention has the beneficial effects that:
1. the packer rubber tube sealing test device is simple and reliable to operate, and can simulate the influence of the upper sealing test channel and the lower sealing test channel on the pressure difference change and the temperature of the packer rubber tube under the high-temperature high-pressure setting environment, so that the sealing capacity of the packer rubber tube is evaluated and analyzed.
2. The setting distance of the rubber sleeve can be directly and accurately recorded by reading the scale value of the upper section of the setting sleeve, and when the packer needs to avoid the situation of certain setting depth (such as a casing coupling and a well section with poor well cementation quality), the setting pipe column can be adjusted through the measured setting distance, so that the purpose of accurately setting the packer is achieved.
Drawings
Fig. 1 is a schematic view of an overall frontal cutaway structure of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, an experimental device for evaluating the sealing capability of a packer rubber cylinder comprises a setting cylinder 1, an outer cylinder 3 and a heating box 14, wherein the setting cylinder 1 is sleeved in the outer cylinder 3, the bottom end of the setting cylinder 1 is inserted into a recess sunken in the center of a base of the outer cylinder 3, the upper end of the setting cylinder is fixed at the top of the outer cylinder 3 through a setting cover 2, a rubber cylinder 10 to be detected is sleeved at the middle of the setting cylinder 1, the rubber cylinder 10 is arranged in a rubber cylinder detection area, the setting cylinder 1 is respectively provided with a setting channel 4 from the top to the bottom and a rubber cylinder lower sealing channel 5 from the top to a lower sealing block 13, the setting cover 2 is provided with a rubber cylinder upper sealing channel 6 from the top to the rubber cylinder, the rubber cylinder lower sealing channel 5 and the rubber cylinder upper sealing channel 6 are both communicated with the rubber cylinder detection area, and the outer cylinder 3 is arranged in the closed heating box 14.
And one setting channel 4, one lower rubber cylinder seal checking channel 5 and one upper rubber cylinder seal checking channel 6 are arranged.
The setting cylinder 1 and the outer cylinder 3 are coaxial solid bodies.
The outer cylinder 3 and the seat cover 2 are fixedly connected through a bolt 8.
The setting cylinder 1 is divided into an upper section, a middle section and a lower section, the diameter of the setting cylinder decreases gradually in a ladder shape from large to small, the diameter of the lower section is consistent with the inner diameter of the outer cylinder 3, the diameter of the middle section is smaller than the inner diameter of the outer cylinder 3, a rubber cylinder detection area is formed by the diameter of the lower section and the inner diameter of the middle section, a rubber cylinder 10 to be detected is arranged in the rubber cylinder detection area, and the diameter of the upper section is consistent with the inner diameter of the upper end of the setting cover 2.
The upper side and the lower side of the rubber cylinder detection area are respectively provided with an upper setting block 9 and a lower setting block 13.
The lower side of the lower setting block 13 is provided with a group of first high-temperature sealing elements 12, the upper side of the upper setting block 9 is provided with two groups of second high-temperature sealing elements 11, the first high-temperature sealing elements 12 are arranged between the setting cylinder 1 and the outer cylinder 3, the lower setting block 13 is respectively arranged between the setting cover 2 and the setting cylinder 1 and between the setting cover 2 and the outer cylinder 3, and the first high-temperature sealing elements 12 and the second high-temperature sealing elements 11 have the function of preventing leakage for high-temperature heat in a rubber cylinder detection area.
The upper segment of setting section of thick bamboo 1 is down marked scale 7 from the top, and when setting packer packing element, the accessible reads scale 7 and records the setting packing element stroke, when need avoiding the condition of some setting degree of depth (like sleeve pipe coupling department, well cementation quality poor well section) to the packer, can set up the tubular column through the adjustment of measuring setting distance to reach the purpose of accurate setting packer.
The bottom of the heating box 14 is provided with an electric heating tube 16, two symmetrical holes are formed in the side wall of the heating box, a thermometer 15 is respectively arranged on each hole, in the test process, a proper amount of heat conduction oil is poured into the heating box 14, the heat conduction oil is heated to 250 ℃ through the electric heating tube 16, or the heat conduction oil is heated to the required temperature through the electric heating tube 16, and the temperature is read by the thermometer 15.
The top of the setting channel 4 is provided with a hydraulic system interface connected with a hydraulic system, the outlet at the bottom of the setting channel is connected with the recessed groove of the outer barrel 3, the pressure of the hydraulic system is transmitted to the recessed groove of the outer barrel 3 and the bottom of the setting barrel 1 through the setting channel 4, and the setting barrel 1 is pushed upwards to set the rubber barrel 10.
The packer lower seal checking channel 5 is provided with a hydraulic system interface at the top to be connected with a hydraulic setting system, an outlet at the bottom of the packer lower seal checking channel is connected with an outlet of a lower setting block 13, after the packer is set, pressure generated by the hydraulic setting system is transmitted to the lower setting block 13 through the setting channel 5, and finally reaches the position below the packer 10 of the packer from the setting block 13.
The packer is provided with a seal checking channel 6, the top of the seal checking channel is provided with a hydraulic system interface to be connected with a hydraulic setting system, the bottom outlet of the seal checking channel is connected with the outlet of an upper setting block 9, after the packer is set, pressure generated by the hydraulic setting system is transmitted to the upper setting block 9 through the setting channel 6, and finally reaches the upper surface of a packer 10 of the packer through the setting block.
The inner diameter of the setting cover 2 has the characteristic of small top and big bottom, and the inner diameter of the setting cover 2 is consistent with the outer diameter of the upper part of the setting cylinder 1.
The working principle is as follows:
during the test, the setting cylinder 1, the setting cover 2, the outer cylinder 3 and the rubber cylinder 10 to be tested are assembled and placed in the closed heating box 14, and proper heat conducting oil is poured into the heating box 14, and the electric heating tube 16 is started to heat the heat conducting oil to the test temperature.
Connect hydraulic system at setting passageway 4 department, set packer packing element through hydraulic system slow pressurization, set the in-process and survey whether there is liquid to return out at the top between setting lid 2 and the setting section of thick bamboo 1, if have when liquid oozes, slowly the pressure release, change high temperature sealing member, test again, can set a distance according to setting section of thick bamboo 1 upper segment scale interval 7 record to the packing element simultaneously.
Can test down to the packing element and seal after the seat seals, test 5 departments of sealing the passageway and connect the hydraulic pressure system of sealing down, test 6 departments of sealing the passageway and connect a manometer at last, progressively pressurize to the lower seal pressure of testing of requirement through the hydraulic pressure system of sealing, pressure is tested below 5 transmission of sealing the passageway to the packing element 10 through testing down, survey simultaneously and test 6 departments of sealing the passageway manometer of sealing the passageway, if it does not change to test 6 departments of sealing the passageway and seal the packing element under, if it rises to test 6 departments of sealing the passageway, it is sealed untight to show the packing element 10, have gas to leak into the channel of sealing 6 from the packing element 10, lead to the packing element to test down and seal nonconformity.
After the sealing is finished, the rubber cylinder can be tested, a hydraulic sealing system is connected at the position of a sealing channel 6, a pressure gauge is connected at the position of a sealing channel 5 which is tested down, the hydraulic sealing system is gradually pressurized to required sealing pressure which is tested up, the pressure is transmitted to the lower side of the rubber cylinder 10 through the sealing channel 6 which is tested up, the pressure gauge at the position of the sealing channel 5 is tested down by observing, if the pressure gauge at the position of the sealing channel 5 is tested down, the sealing is tested to be qualified under the rubber cylinder, if the pressure gauge at the position of the sealing channel 5 is tested down, the sealing on the rubber cylinder is indicated to be unqualified, and the sealing test is terminated.
After the pressure test is finished, the experimental equipment and the rubber cylinder are dismantled, and the surface states of the experimental equipment and the rubber cylinder are checked, so that the change of the shape of the setting and sealing process of the rubber cylinder is judged.
The present invention has been described above by way of example, but is not limited to the particular forms disclosed, and it should be understood that various modifications and substitutions by those skilled in the art may be made without departing from the spirit and scope of the present invention.
Claims (9)
1. The utility model provides an experimental apparatus of evaluation packer packing element sealing ability which characterized in that: the device comprises a setting cylinder (1), an outer cylinder (3) and a heating box (14), wherein the setting cylinder (1) is sleeved in the outer cylinder (3), the bottom end of the setting cylinder is inserted into a groove sunken in the center of a base of the outer cylinder (3), the upper end of the setting cylinder is fixed at the top of the outer cylinder (3) through a setting cover (2), a rubber cylinder (10) to be detected is sleeved at the middle part of the setting cylinder (1), the rubber cylinder (10) is arranged in a rubber cylinder detection area, the setting cylinder (1) is respectively provided with a setting channel (4) from the top to the bottom and a rubber cylinder lower detection channel (5) of a setting block (13) from the top to the lower part, the setting cover (2) is provided with a rubber cylinder upper detection channel (6) from the top to the rubber cylinder, the rubber cylinder lower detection channel (5) and the rubber cylinder upper detection channel (6) are both communicated with the rubber cylinder detection area, the outer cylinder (3) is arranged in the closed heating box (14), the diameter of sitting and sealing a section of thick bamboo (1) hypomere is unanimous with urceolus (3) internal diameter, and the diameter in middle section is less than the internal diameter of urceolus (3) to this forms a packing element detection zone, is equipped with packing element (10) that wait to detect in the packing element detection zone, and the diameter of upper segment is unanimous with sitting closing cap (2) upper end internal diameter.
2. The experimental device for evaluating the sealing capacity of the packer rubber sleeve is characterized in that: the setting channel (4), the lower seal checking channel (5) of the rubber cylinder and the upper seal checking channel (6) of the rubber cylinder are all provided with one.
3. The experimental device for evaluating the sealing capacity of the packer rubber sleeve is characterized in that: the setting cylinder (1) is respectively divided into an upper section, a middle section and a lower section, and the diameter of the setting cylinder decreases gradually from large to small in a step shape.
4. The experimental device for evaluating the sealing capability of the packer rubber according to claim 1 or 3, characterized in that: the setting barrel (1) and the outer barrel (3) are coaxial solid bodies, and scales (7) are marked on the upper section of the setting barrel (1) from the top to the bottom.
5. The experimental device for evaluating the sealing capability of the packer rubber according to claim 1 or 3, characterized in that: the upper and lower sides in packing element detection zone are equipped with respectively and sit seal piece (9) and lower seat seal piece (13), the downside of seat seal piece (13) is equipped with a set of first high temperature sealing member (12) down, goes up and sits seal piece (9) upside and is equipped with two sets of second high temperature sealing member (11), establish between seat seal section of thick bamboo (1) and urceolus (3) first high temperature sealing member (12), seat seal piece (13) are established respectively and are sat between closing cap (2) and seat seal section of thick bamboo (1) and sit between closing cap (2) and urceolus (3) down.
6. The experimental device for evaluating the sealing capacity of the packer rubber sleeve is characterized in that: the bottom of the heating box (14) is provided with an electric heating pipe (16), and the side wall of the heating box is symmetrically provided with thermometers (15).
7. The experimental device for evaluating the sealing capability of the packer rubber according to claim 1 or 2, characterized in that: the top of the setting channel (4) is provided with a hydraulic system interface, and an outlet at the bottom of the setting channel is connected with a recessed groove of the outer barrel (3).
8. The experimental device for evaluating the sealing capability of the packer rubber according to claim 1 or 2, characterized in that: the top of the rubber cylinder lower seal checking channel (5) is provided with a hydraulic system interface, and an outlet at the bottom of the rubber cylinder lower seal checking channel is connected with an outlet of the lower setting block (13).
9. The experimental device for evaluating the sealing capability of the packer rubber according to claim 1 or 2, characterized in that: the rubber cylinder is provided with a seal checking channel (6), the top of the seal checking channel is provided with a hydraulic system interface, and the bottom outlet of the seal checking channel is connected with the outlet of the upper setting block (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911403334.2A CN110987326B (en) | 2019-12-31 | 2019-12-31 | Experimental device for evaluating sealing capacity of packer rubber barrel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911403334.2A CN110987326B (en) | 2019-12-31 | 2019-12-31 | Experimental device for evaluating sealing capacity of packer rubber barrel |
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| CN110987326A CN110987326A (en) | 2020-04-10 |
| CN110987326B true CN110987326B (en) | 2021-09-17 |
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| CN201911403334.2A Active CN110987326B (en) | 2019-12-31 | 2019-12-31 | Experimental device for evaluating sealing capacity of packer rubber barrel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112611640B (en) * | 2020-10-22 | 2022-05-17 | 西南石油大学 | Device and method for testing high-temperature compression performance of variable-specification multi-size rubber cylinder |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3309343B2 (en) * | 1993-01-21 | 2002-07-29 | 日本防蝕工業株式会社 | Probe for measuring the polarization resistance in a thin tube |
| CN108414199A (en) * | 2017-12-29 | 2018-08-17 | 中国海洋石油集团有限公司 | Visualize the performance testing device of packing element |
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2019
- 2019-12-31 CN CN201911403334.2A patent/CN110987326B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3309343B2 (en) * | 1993-01-21 | 2002-07-29 | 日本防蝕工業株式会社 | Probe for measuring the polarization resistance in a thin tube |
| CN108414199A (en) * | 2017-12-29 | 2018-08-17 | 中国海洋石油集团有限公司 | Visualize the performance testing device of packing element |
Non-Patent Citations (1)
| Title |
|---|
| 油田新型密封工具的设计与试验评价研究;李康等;《工艺技术》;20171231(第10期);全文 * |
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