CN212621337U - Sealing element for deep sea compensator and sealing life testing device thereof - Google Patents
Sealing element for deep sea compensator and sealing life testing device thereof Download PDFInfo
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- CN212621337U CN212621337U CN202021334099.6U CN202021334099U CN212621337U CN 212621337 U CN212621337 U CN 212621337U CN 202021334099 U CN202021334099 U CN 202021334099U CN 212621337 U CN212621337 U CN 212621337U
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Abstract
The utility model relates to a deep sea is sealing member for compensator and seal life's testing arrangement thereof, the device includes: the test barrel is provided with a cooling and heat-preserving system on the outer wall, a test tool device is arranged in the test barrel, the test tool device is of a barrel-shaped structure comprising a top cover and a base, a sliding block capable of sliding along the axial direction of the sliding block is accommodated in a cavity of the test tool device, an annular sealing structure is sleeved on the outer wall of the sliding block in a sleeved mode, and the sliding block divides the cavity of the test tool device into an upper cavity and a lower cavity; the hydraulic press is provided with an A-end pressure regulator and a B-end pressure regulator, the A-end pressure regulator is connected with the upper cavity through a first guide pipe penetrating through the top cover, and the B-end pressure regulator is connected with the lower cavity through a second guide pipe penetrating through the base; the high-pressure pump is provided with a liquid outlet and No. two liquid outlets on. The device can test the sealing performance of the sealing element.
Description
Technical Field
The utility model relates to a deep sea is sealing member for compensator and seal life's testing arrangement thereof belongs to ocean oil gas and natural gas hydrate exploration and development technical field.
Background
In the process of developing petroleum and natural gas in open water, the deep water floating type drilling platform can float up and down and generate transverse shearing force due to the up-and-down floating caused by sea waves in operation. Therefore, a pipe column compensator for a floating drilling platform is developed, has the functions of transmitting torque and self-righting of a pipe column, and simultaneously keeps the sealing of a telescopic pipe column for a long time without failure.
The floating drilling platform is provided with a floating body submerged under water, and the floating body is connected with an upper deck by a vertical column and is in a floating state during operation. The floating drilling platform works in a deep water area, positioning equipment, generally an anchoring positioning system, is required, and when the water depth exceeds 300-500 m, a dynamic positioning system or a deep water anchoring positioning system is required. The floating drilling platform has small amplitude of roll and pitch because the lower part is immersed in water, but the heave motion influence is large. Due to the floating operating characteristics of a floating drilling platform, the work string is both affected by lateral shear forces (less) but floats up and down (more frequently). Therefore, during the floating platform test operation, a tool is required to compensate for the pipe string shrinkage in the working string.
SUMMERY OF THE UTILITY MODEL
To the outstanding problem, the utility model provides a deep sea is sealing member for compensator and seal life's testing arrangement, the axial cross section of the seal structure of this sealing member adopts the chevron shape design, can greatly provide its sealing performance under high-pressure condition, when the sealing member suffered the sea water fluctuation and when being extruded, can effectively seal the inside and outside pressure of tubular column.
In order to achieve the purpose, the utility model adopts the following technical proposal:
the utility model discloses the first aspect provides a sealing member for deep sea compensator, include:
the annular sealing structure is sleeved in an annular gap formed by the outer operation string and the inner operation string in a sleeved mode and comprises a first outer layer, a first filling layer, a middle layer, a second filling layer and a second outer layer which are sequentially and integrally arranged, wherein the first outer layer, the middle layer and the second outer layer are all PEEK layers, the first filling layer and the second filling layer are of a multilayer structure formed by alternately distributing at least one PTFE-based composite layer and at least one PTFE layer, the axial cross sections of the PTFE-based composite layer and the PTFE layer are in a herringbone shape, the tips of the PTFE-based composite layer and the PTFE layer in the first filling layer face the first outer layer, and the tips of the PTFE-based composite layer and the PTFE layer in the second filling layer face the second outer layer;
and the two annular righting structures are respectively sleeved on the outer walls of the inner operation pipe columns at the two ends of the annular sealing structure in an annular mode.
The sealing member for the deep sea compensator preferably has the number average molecular weight of 10-16 ten thousand of PEEK in the PEEK layer, the tensile strength of 98MPa and the glass transition temperature of 150 ℃.
The sealing member for the deep sea compensator preferably has a PTFE layer containing PTFE having a number average molecular weight of 100-150 ten thousand and a specific gravity of 2.17g/cm3The bulk density was 814.16 g/L.
The sealing member for the deep sea compensator is preferably prepared by using carbon fiber reinforced PTFE as a PTFE-based composite layer, wherein the number average molecular weight is 100-150 ten thousand, and the specific gravity is 2.089g/cm3The bulk density was 708.8 g/L.
The utility model discloses the second aspect provides a testing arrangement of sealing member for deep sea compensator, include:
the test barrel is provided with a cooling and heat-insulating system on the outer wall, a test tool is arranged in the test barrel, an ice-water mixture is filled between the test tool and the test barrel, the test tool is of a cylindrical structure comprising a top cover and a base, a slide block capable of axially sliding along the test tool is accommodated in a cavity of the test tool, the annular sealing structure is sleeved on the outer wall of the slide block, and the slide block divides the cavity of the test tool into an upper cavity and a lower cavity;
the hydraulic press is provided with an A-end pressure regulator and a B-end pressure regulator, the A-end pressure regulator is connected with the upper cavity through a first guide pipe penetrating through the top cover, and the B-end pressure regulator is connected with the lower cavity through a second guide pipe penetrating through the base;
the high-pressure pump is provided with a liquid outlet and a liquid outlet No. two on the high-pressure pump, the liquid outlet through running through No. three pipes of top cap with the upper cavity is connected, No. two liquid outlets through running through No. four pipes of base with the cavity is connected down.
The testing device, preferably, be provided with a high pressure on the pipe and become detain and No. three high-pressure stop valve, be provided with No. two high pressure on No. two pipes and become detain and No. four high-pressure stop valves.
The testing device, preferably, be provided with a high-pressure stop valve and a manometer on No. three pipes, be provided with No. two high-pressure stop valves and No. two manometers on No. four pipes.
The testing device is preferably characterized in that a temperature sensor is further arranged in the testing barrel and used for monitoring the temperature in the testing barrel at any time.
The utility model discloses the third aspect provides a deep sea is test method of sealed life-span of sealing member for compensator, including following step:
(a) placing the sliding block sleeved with the annular sealing structure into the testing tool, then placing the testing tool into the testing barrel, and then adding an ice-water mixture into the testing barrel;
(b) opening the hydraulic press, respectively setting the pressure of the A-end pressure regulator and the B-end pressure regulator, and simultaneously setting the number of times of up-and-down sliding of the sliding block in the test tool device, wherein liquid in the hydraulic press respectively enters the upper cavity and the lower cavity through the first guide pipe and the second guide pipe, and pushes the sliding block to slide up and down;
(c) when the sliding block slides up and down in the test tool device to reach the set times, the third high-pressure stop valve and the fourth high-pressure stop valve are closed, the high-pressure pump, the first high-pressure stop valve and the second high-pressure stop valve are opened, the numerical value change of the first pressure gauge and the numerical value change of the second pressure gauge are monitored, and the sealing performance of the annular sealing structure is judged.
The testing method, preferably, the verifying pressure in the step (c) is higher than the reciprocating sliding pressure in the step (b).
The utility model discloses owing to take above technical scheme, it has following advantage:
1. the utility model discloses well sealing member is compounded by multilayer high molecular polymer layer and forms, wherein the PEEK layer that hardness is high forms skeleton structure as first outer layer, intermediate level and second outer layer, provides hardness support for the sealing member, and first filling layer and second filling layer are the multilayer structure of PTFE layer and PTFE base composite bed alternate distribution, provide soft district buffer site for the sealing member, can play real rigid reciprocating seal effect; on the other hand, the axial cross section of the sealing element is designed into a herringbone shape, so that the sealing performance of the sealing element in a high-pressure state can be greatly improved, and when the sealing element is extruded due to the fact that seawater floats up and down, the pressure inside and outside the pipe column can be effectively sealed;
2. the sealing element designed by the utility model is tested in the testing device of the sealing service life, after the sealing element reciprocates 1 ten thousand times in the testing device, the sealing element is tested by the high-pressure pump (the testing pressure is 70MPa), and still has good rigid sealing effect, and the liquid in the testing tool device can not leak;
3. the utility model discloses a testing arrangement can carry out many times (last ten thousand times) sliding test to the sealing performance of sealing member to can verify the sealing performance of sealing member according to the pressure condition in seabed.
Drawings
Fig. 1 is a schematic perspective view of a middle sealing structure of the present invention;
FIG. 2 is a schematic view of the cross-sectional structure of the sealing structure of the present invention installed between the inner and outer operation pipe columns;
fig. 3 is a schematic view of a partial three-dimensional structure of the middle sealing structure of the present invention;
fig. 4 is a sectional view of a partial three-dimensional structure of the middle sealing structure of the present invention;
FIG. 5 is a flow chart of the verification of the life of the sealing structure in the present invention;
the respective symbols in the figure are as follows:
1-an annular sealing structure; 2-a ring-shaped righting structure; 3-external operation of the pipe column; 4-inner operation tubular column; a 5-PEEK layer; 6-PTFE based composite layer; 7-a PTFE layer; 8-testing the barrel; 9-cooling and heat-preserving system; 10-test fixture, 101-top cover, 102-base, 103-slide block; 11-a hydraulic press, 111-a end pressure regulator, 112-B end pressure regulator, 113-a high pressure transformer, 114-a high pressure transformer, 115-a high pressure stop valve, 116-a high pressure stop valve, 117-a end speed regulator, 118-B end speed regulator, 119-a conduit and 120-a conduit; 12-a high-pressure pump, 121-a liquid outlet, 122-a liquid outlet, 123-a high-pressure stop valve, 124-a high-pressure stop valve, 125-a pressure gauge, 126-a pressure gauge, 127-a conduit, and 128-a conduit; 13-temperature sensor.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention are clearly and completely described below, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by the ordinary person in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be understood that the terms "first", "second", etc. are used to define the components, and are only used for the convenience of distinguishing the components, and if not stated otherwise, the terms have no special meaning, and therefore, should not be interpreted as limiting the scope of the present invention.
Example 1
As shown in fig. 1 to 4, the present embodiment provides a seal for a deep sea compensator, including:
the annular sealing structure 1 is sleeved in an annular gap formed by the outer operation pipe column 3 and the inner operation pipe column 4 in a sleeved mode, the annular sealing structure 1 comprises a first outer layer, a first filling layer, a middle layer, a second filling layer and a second outer layer which are sequentially and integrally arranged, the first outer layer, the middle layer and the second outer layer are all PEEK layers 5, the first filling layer and the second filling layer are of a multilayer structure formed by alternately distributing at least one PTFE-based composite layer 6 and at least one PTFE layer 7, the axial cross sections of the PTFE-based composite layer 6 and the PTFE layer 7 are in a herringbone shape, the tips of the PTFE-based composite layer 6 and the PTFE layer 7 in the first filling layer face the first outer layer, and the tips of the PTFE-based composite layer 6 and the PTFE layer 7 in the second filling layer face the second outer layer;
the annular righting structures 2 and the two annular righting structures 2 are respectively sleeved on the outer walls of the inner operation pipe columns 4 at the two ends of the annular sealing structure 1 in an annular mode.
In this embodiment, the annular centralizing structure 2 is preferably a PEEK annular ring, and the PEEK annular ring slit ring is sleeved on the outer wall of the inner work string 4.
In the embodiment, preferably, the number average molecular weight of PEEK in the PEEK layer 5 is 10 to 16 ten thousand, the tensile strength is 98MPa, the tensile strain at break is 25%, and the tensile modulus is 3.7GPa (test standard is ISO527, and test temperature is 23 ℃); the melting point was 343 ℃ and the glass transition temperature was 150 ℃ (test standard ISO11357, DSC).
In the present embodiment, the PTFE layer 7 preferably has a PTFE number average molecular weight of 100-150 ten thousand and a specific gravity of 2.17g/cm334.17MPa tensile strength (transverse direction), 263.72% elongation at break (transverse direction), 814.16g/L bulk density (ASTM D4894 test method), and 62.5Shore D Shore hardness (ASTM D2240 test method).
In this embodiment, the PTFE-based composite layer 6 is preferably carbon fiber-reinforced PTFE having a number average molecular weight of 100-150 ten thousand and a specific gravity of 2.089g/cm328.9MPa tensile strength (transverse direction), 171.31% elongation at break (transverse direction), 708.8g/L bulk density (ASTM D4894 test method), 70Shore D Shore hardness (ASTM D2240 test method), wherein the carbon fiber content is 16% by weight.
In the embodiment, the axial cross section of the sealing element is designed into a herringbone structure, so that when the sealing element is extruded due to the fact that seawater floats up and down, the internal pressure and the external pressure of the pipe column can be effectively sealed.
Example 2
As shown in fig. 5, based on the sealing member for deep sea compensator that embodiment 1 provided, the utility model also provides a testing arrangement of this sealing member for deep sea compensator seal life-span, include:
the test device comprises a test barrel 8, wherein a cooling and heat-insulating system 9 is arranged on the outer wall of the test barrel 8, a test tool 10 is arranged in the test barrel 8, an ice-water mixture is filled between the test tool 10 and the test barrel 8, the test tool 10 is of a cylindrical structure comprising a top cover 101 and a base 102, a slider 103 capable of axially sliding along the test tool is accommodated in a cavity of the test tool 10, an annular sealing structure 1 is sleeved on the outer wall of the slider 103, and the slider 103 divides the cavity of the test tool 10 into an upper cavity and a lower cavity;
the hydraulic press 11 is provided with an A-end pressure regulator 111 and a B-end pressure regulator 112, the A-end pressure regulator 111 is connected with the upper cavity through a first guide pipe 119 penetrating through the top cover 101, and the B-end pressure regulator 112 is connected with the lower cavity through a second guide pipe 120 penetrating through the base 102;
high-pressure pump 12, high-pressure pump 12 is last to be provided with a liquid outlet 121 and No. two liquid outlets 122, and No. one liquid outlet 121 is connected with the upper cavity through No. three pipe 127 that runs through top cap 101, and No. two liquid outlets 122 are connected with the cavity down through No. four pipe 128 that runs through base 102.
In this embodiment, preferably, the first conduit 119 is provided with a first high-pressure transformer 113 and a third high-pressure stop valve 115.
In this embodiment, preferably, the second conduit 120 is provided with a second high-pressure transformer 114 and a fourth high-pressure stop valve 116.
In this embodiment, preferably, the third conduit 127 is provided with a first high-pressure stop valve 123 and a first pressure gauge 125.
In this embodiment, a second high-pressure stop valve 124 and a second pressure gauge 126 are preferably disposed on the fourth conduit 128.
In this embodiment, preferably, a temperature sensor is further disposed in the testing barrel 8, and is used for monitoring the temperature in the testing barrel 8 at any time.
Example 3
Based on the sealing member for the deep sea compensator that embodiment 1 provided and the testing arrangement that embodiment 2 provided, the utility model also provides a method for testing the sealing life of this sealing member for the deep sea compensator, as shown in fig. 5, include the following step:
(a) the sliding block 103 sleeved with the annular sealing structure 1 is placed into a testing tool 10, then the testing tool 10 is placed into a testing barrel 8, and then an ice-water mixture is added into the testing barrel 8;
(b) starting the hydraulic press 11, respectively setting the reversing pressure of the end A pressure regulator 111 and the end B pressure regulator 112, and simultaneously setting the number of times of the slide block 103 sliding up and down in the test fixture 10, wherein the liquid in the hydraulic press 11 respectively enters the upper cavity and the lower cavity through the first guide pipe 119 and the second guide pipe 120, and pushes the slide block 103 to slide up and down;
(c) after the slider 103 slides up and down in the test fixture 10 for a set number of times, the third high-pressure stop valve 115 and the fourth high-pressure stop valve 116 are closed, the high-pressure pump 12, the first high-pressure stop valve 123 and the second high-pressure stop valve 124 are opened, the numerical value changes of the first pressure gauge 125 and the second pressure gauge 126 are monitored, and the sealing performance of the annular sealing structure 1 is judged.
In this embodiment, preferably, the verification pressure in step (c) is higher than the reciprocating sliding pressure in step (b).
In this embodiment, preferably, in the step (B), the pressures of the pressure regulator 111 at the a end and the pressure regulator 112 at the B end are set to 10MPa, when the pressure of the upper cavity is greater than 10MPa, the hydraulic pressure of the hydraulic press 11 is reversed, and the liquid starts to flow to the lower cavity, and when the pressure of the lower cavity is greater than 10MPa, the hydraulic pressure of the hydraulic press 11 is reversed, and the liquid starts to flow to the upper cavity, and the slider 103 reciprocates up and down in the test fixture 10.
In this embodiment, preferably, in the step (c), the third high-pressure stop valve 115 and the fourth high-pressure stop valve 116 are opened, the high-pressure pump 12 is started, when the pressure reaches 70MPa, pressure stabilization is performed for fifteen minutes, the first pressure gauge 125 in the upper cavity and the second pressure gauge 126 in the lower cavity are observed, if the first pressure gauge 125 has no pressure drop and the second pressure gauge 126 has no pressure rise, the sealing performance is reliable, and the reciprocating test is continued until reciprocating reaches ten thousand times; when the pressure of the upper cavity is more than 70MPa, the high pressure is manually reversed, and when the pressure of the lower cavity is more than 70MPa, the third high pressure stop valve 115 and the fourth high pressure stop valve 116 are closed.
In this embodiment, after the slider 103 reciprocates 1 ten thousand times in the test fixture 10, the sealing performance of the slider is still good and no leakage occurs as a result of the test of the high-pressure pump 12.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (4)
1. A seal for a deep sea compensator, comprising:
an annular sealing structure (1) which is sleeved in an annular gap formed by the outer operating pipe column (3) and the inner operating pipe column (4), the annular sealing structure (1) comprises a first outer layer, a first filling layer, a middle layer, a second filling layer and a second outer layer which are sequentially and integrally arranged, wherein the first outer layer, the intermediate layer and the second outer layer are all PEEK layers (5), the first filling layer and the second filling layer are of a multilayer structure formed by at least one PTFE-based composite layer (6) and at least one PTFE layer (7) which are alternately distributed, and the axial cross sections of the PTFE-based composite layer (6) and the PTFE layer (7) are in a herringbone shape, the tips of the PTFE-based composite layer (6) and the PTFE layer (7) in the first filler layer are directed toward the first outer layer, the tips of the PTFE-based composite layer (6) and the PTFE layer (7) in the second filler layer are directed towards the second outer layer;
the annular centralizing structures (2), the two annular centralizing structures (2) are respectively sleeved on the outer walls of the inner operation pipe columns (4) at the two ends of the annular sealing structure (1).
2. A device for testing the sealing life of a seal member for a deep sea compensator according to claim 1, comprising:
the testing device comprises a testing barrel (8), wherein a cooling and heat-insulating system (9) is arranged on the outer wall of the testing barrel (8), a testing tool (10) is arranged in the testing barrel (8), an ice-water mixture is filled between the testing tool (10) and the testing barrel (8), the testing tool (10) is of a cylindrical structure comprising a top cover (101) and a base (102), a sliding block (103) capable of axially sliding along the testing tool is accommodated in a cavity of the testing tool (10), the annular sealing structure (1) is sleeved on the outer wall of the sliding block (103), and the sliding block (103) divides the cavity of the testing tool (10) into an upper cavity and a lower cavity;
the hydraulic press comprises a hydraulic press (11), wherein an A-end pressure regulator (111) and a B-end pressure regulator (112) are arranged on the hydraulic press (11), the A-end pressure regulator (111) is connected with the upper cavity through a first guide pipe (119) penetrating through the top cover (101), and the B-end pressure regulator (112) is connected with the lower cavity through a second guide pipe (120) penetrating through the base (102);
the high-pressure pump (12) is provided with a first liquid outlet (121) and a second liquid outlet (122) on the high-pressure pump (12), the first liquid outlet (121) is connected with the upper cavity through a third guide pipe (127) penetrating through the top cover (101), and the second liquid outlet (122) is connected with the lower cavity through a fourth guide pipe (128) penetrating through the base (102).
3. The testing device as claimed in claim 2, wherein a first high-pressure transformer (113) and a third high-pressure stop valve (115) are arranged on the first conduit (119), and a second high-pressure transformer (114) and a fourth high-pressure stop valve (116) are arranged on the second conduit (120).
4. The testing device according to claim 2, wherein a first high-pressure stop valve (123) and a first pressure gauge (125) are arranged on the third conduit (127), and a second high-pressure stop valve (124) and a second pressure gauge (126) are arranged on the fourth conduit (128).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021334099.6U CN212621337U (en) | 2020-07-09 | 2020-07-09 | Sealing element for deep sea compensator and sealing life testing device thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021334099.6U CN212621337U (en) | 2020-07-09 | 2020-07-09 | Sealing element for deep sea compensator and sealing life testing device thereof |
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| CN212621337U true CN212621337U (en) | 2021-02-26 |
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| CN202021334099.6U Active CN212621337U (en) | 2020-07-09 | 2020-07-09 | Sealing element for deep sea compensator and sealing life testing device thereof |
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