CN111458083B - Sealing test pressure testing device for rotary blowout preventer - Google Patents
Sealing test pressure testing device for rotary blowout preventer Download PDFInfo
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- CN111458083B CN111458083B CN202010167326.9A CN202010167326A CN111458083B CN 111458083 B CN111458083 B CN 111458083B CN 202010167326 A CN202010167326 A CN 202010167326A CN 111458083 B CN111458083 B CN 111458083B
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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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Abstract
The invention relates to a sealing inspection pressure test device for a rotary blowout preventer, which comprises a drill rod, a base, a rotary driving main shaft, a locking mechanism, a drill rod fastening mechanism and a hydraulic lifting support, wherein the rotary blowout preventer is fixedly arranged on the top surface of the base and is assisted to be locked on the top surface of the base by the locking mechanism; the drill rod fastening mechanism is arranged on the hydraulic lifting support and can lift along with the lifting of the hydraulic lifting support, one end of the drill rod can be connected with the drill rod fastening mechanism, and the other end of the drill rod penetrates through a rotary sealing device of the rotary blowout preventer and can be fixedly connected with the rotary driving main shaft; the invention tests and tests the sealing performance of the rotary blowout preventer, the dynamic and static sealing performance and the pressure grade of the rotary sealing device.
Description
Technical Field
The invention belongs to the technical field of drilling equipment, and particularly relates to a sealing test pressure testing device for a rotary blowout preventer.
Background
The rotary blowout preventer is necessary equipment for underbalanced drilling, geothermal drilling and coal bed gas drilling. The device plays a role in sealing and isolating between the borehole annulus and the drill string, provides safe and effective pressure control, and has the function of guiding the return fluid of the borehole away from a wellhead. The development of the rotary blowout preventer expands the application range of the underbalanced drilling technology, for example, when the drilling characteristics such as closed cycle, side-spraying and side-drilling, measurement while drilling, well hole testing, reverse circulation, nitrogen injection and the like are changed, the sealing capability of the rotary blowout preventer influences the whole underbalanced drilling process, and the sealing performance test of the rotary blowout preventer at present has the following problems: 1. there is no corresponding rotary blowout preventer seal performance testing device; 2. when other devices are adopted to carry out a sealing test on the rotary blowout preventer, the sealing performance of the rotary sealing device of the core component of the rotary blowout preventer cannot be tested at the same time; 3. the sealing test process can not simulate the field application condition for testing, and certain test basis is lacked.
Therefore, in view of these problems, it is important to provide a seal testing and pressure testing device for a rotary blowout preventer, which can perform a field simulation test and a detection of the sealing performance and the pressure level of a rotary seal device, which is a core member of the rotary blowout preventer, while performing a detection of the sealing performance and the pressure level of the rotary blowout preventer.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a seal inspection pressure test device for a rotary blowout preventer, which can detect the sealing performance and the pressure level of a rotary blowout preventer body and can also perform an on-site simulation test and the detection of the sealing performance and the pressure level of a rotary sealing device of a core component of the rotary blowout preventer.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
a sealing inspection pressure test device for a rotary blowout preventer comprises a drill rod, a base, a rotary driving main shaft, a locking mechanism, a drill rod fastening mechanism and a hydraulic lifting support, wherein the rotary blowout preventer is fixedly installed on the top surface of the base and is assisted to be locked on the top surface of the base by the locking mechanism, the rotary driving main shaft is installed on the base right below the rotary blowout preventer, the rotary driving main shaft can be driven to rotate by a hydraulic driving motor, and the rotary driving main shaft does not depart from the upper surface of the base in the rotating process;
the drill rod fastening mechanism is arranged on the hydraulic lifting support and can lift along with the lifting of the hydraulic lifting support, one end of the drill rod can be connected with the drill rod fastening mechanism, and the other end of the drill rod penetrates through a rotary sealing device of the rotary blowout preventer and can be fixedly connected with the rotary driving main shaft;
the hydraulic driving motor can drive the rotary driving main shaft to rotate, and the rotary driving main shaft can drive the drill rod to rotate, so that the rotary sealing device of the rotary blowout preventer sleeved on the drill rod is driven to rotate.
Furthermore, the locking mechanism comprises two semicircular locking blocks, the tail ends of the semicircular locking blocks are hinged through pins, and the front ends of the semicircular locking blocks are respectively hinged with two ends of the hydraulic cylinder through pins.
Furthermore, the rotary blowout preventer is fixedly connected with the base through a locating pin, and a sealing steel ring is arranged between the rotary blowout preventer and the base.
Furthermore, the inner side of the semicircular locking block is of a concave structure, and a convex structure matched with the semicircular locking block structure is formed on the surface of the base, so that the semicircular locking block locks the rotary blowout preventer on the base.
Furthermore, supporting blocks are fixedly arranged on two sides of the surface of the base, and limiting blocks are arranged on the surfaces of the supporting blocks and can limit the opening of the semicircular locking blocks.
Furthermore, the surface of the base is provided with a groove, the rotary driving main shaft is limited in the groove, the rotary driving main shaft and the groove form pressure seal through a sealing ring, the relative rotation of the rotary driving main shaft and the groove is realized through a bearing, the rotary driving main shaft is provided with a drill rod joint, and the drill rod can be fixedly connected with the drill rod joint.
Furthermore, the drill rod fastening mechanism can fasten one end of the drill rod, and the drill rod fastening mechanism can be driven to rotate by the variable frequency motor, so that the drill rod is driven to rotate.
Furthermore, the drill rod fastening mechanism adopts a hydraulic chuck locking mode to realize the locking of the drill rod.
A seal inspection pressure testing device for a rotary blowout preventer is applied to a seal test of the rotary blowout preventer, and the application steps comprise:
the rotary blowout preventer is arranged on the base and is locked with the base through a locking mechanism;
installing a rotary seal device of a rotary blowout preventer into the rotary blowout preventer;
the drill rod fastening mechanism clamps the drill rod, the hydraulic lifting support is operated to enable the drill rod to descend, the drill rod penetrates through a rotary sealing device of the rotary blowout preventer, and the lower end of the drill rod reaches the position of a drill rod joint of the rotary driving main shaft;
the variable frequency motor drives the drill rod fastening mechanism to rotate, so that the drill rod is in threaded fastening connection with the drill rod joint, and the drill rod fastening mechanism is loosened after the drill rod is in threaded fastening connection;
carrying out a static water sealing test of a rotary sealing device of the rotary blowout preventer: injecting clear water into the rotary blowout preventer through a pressure testing joint on the rotary blowout preventer, gradually pressurizing to test pressure, stabilizing the pressure of each stage of pressure for 10 minutes, and statically observing, wherein the pressure drop is less than or equal to a preset value and is qualified;
carrying out dynamic water sealing test of the rotary sealing device of the rotary blowout preventer: the hydraulic driving motor drives the rotary driving main shaft to control the rotating speed to be 20-40 r/min, clear water is injected into the rotary blowout preventer through a pressure testing joint on the rotary blowout preventer and is pressurized step by step to test pressure, each step of pressure is stabilized for 10 min and is statically observed, and the pressure drop is qualified when the pressure drop is smaller than or equal to a preset value;
and (3) performing a water sealing test of the rotary blowout preventer: installing a body pressure test blanking plug into the rotary blowout preventer, injecting clear water into the rotary blowout preventer through a pressure test joint on the rotary blowout preventer, pressurizing step by step to test pressure, stabilizing the pressure of each step for 10 minutes, and statically observing, wherein the pressure drop is smaller than or equal to a preset value and is qualified;
and after the test is finished, checking sealing elements at all positions of the rotary blowout preventer and the rotary sealing device of the rotary blowout preventer according to the water sealing test data, and issuing a pressure test inspection report.
The invention has the advantages and positive effects that:
1. the hydraulic drive motor drives the drill rod to rotate, so that the rotary sealing device of the rotary blowout preventer is driven to rotate, and the dynamic and static sealing performance detection is realized;
2. the locking mechanism is provided with the two semicircular locking blocks, the rotary blowout preventer can be quickly fixed on the pressure test base, and the rotary blowout preventer is fixed by matching with a small number of positioning pins, so that the complicated procedure of fastening by using bolts in the conventional sealing test is omitted, and a large amount of time and labor can be saved;
3. the hydraulic lifting support can apply corresponding acting force when the drill rod is inserted into or pulled out of the rotary sealing device of the rotary blowout preventer, so that the drill rod can smoothly enter or be pulled out; the drill rod fastening mechanism can lock the drill rod and downwards insert the drill rod into the rotary sealing device of the rotary blowout preventer, and corresponding locking force is given when the drill rod is subjected to make-up and break-out operations.
Drawings
The technical solution of the present invention will be described in further detail with reference to the accompanying drawings and examples, but it should be understood that these drawings are designed for illustrative purposes only and thus are not intended to limit the scope of the present invention. Furthermore, unless otherwise indicated, the drawings are intended to be illustrative of the structural configurations described herein and are not necessarily drawn to scale.
Fig. 1 is a schematic structural diagram of a seal testing pressure testing device for a rotary blowout preventer, according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a locking mechanism of a seal testing pressure testing device for a rotary blowout preventer, according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of a pressure testing plug of the rotary blowout preventer according to an embodiment of the present invention;
FIG. 4 is a cross-sectional view of a configuration of a pressure testing plug of a rotary blowout preventer according to an embodiment of the present invention;
Detailed Description
First, it should be noted that the specific structures, features, advantages, etc. of the present invention will be specifically described below by way of example, but all the descriptions are for illustrative purposes only and should not be construed as limiting the present invention in any way. Furthermore, any single feature described or implicit in any embodiment or any single feature shown or implicit in any drawing may still be combined or subtracted between any of the features (or equivalents thereof) to obtain still further embodiments of the invention that may not be directly mentioned herein. In addition, for the sake of simplicity, the same or similar features may be labeled only in one place in the same drawing.
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 furthermore, the terms "comprises" and "having", and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that the present product is conventionally placed in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance.
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 specifically described with reference to fig. 1 to 4.
Example 1
Fig. 1 is a schematic structural diagram of a seal testing pressure testing device for a rotary blowout preventer, according to an embodiment of the present invention; fig. 2 is a schematic structural diagram of a locking mechanism of a seal testing pressure testing device for a rotary blowout preventer, according to an embodiment of the present invention; FIG. 3 is a schematic structural view of a pressure testing plug of the rotary blowout preventer according to an embodiment of the present invention; FIG. 4 is a cross-sectional view of a configuration of a pressure testing plug of a rotary blowout preventer according to an embodiment of the present invention; as shown in fig. 1 to 4, the sealing test pressure testing device for the rotary blowout preventer, provided by this embodiment, includes a drill rod 1, a base 8, a rotary driving spindle 9, a locking mechanism 12, a drill rod fastening mechanism 17, and a hydraulic lifting support 18, where the rotary blowout preventer 3 is fixedly mounted on a top surface of the base 8, specifically, the rotary blowout preventer 3 is fixedly connected to the base 8 through a locating pin 5, a sealing steel ring 4 is disposed between the rotary blowout preventer 3 and the base 8, and the rotary blowout preventer 3 is assisted by the locking mechanism 12 to be locked on the top surface of the base 8, the rotary driving spindle 9 is mounted on the base 8 directly below the rotary blowout preventer, and the rotary driving spindle 9 can be driven to rotate by the hydraulic driving motor 7, in this embodiment, the hydraulic driving motor 7 can be mounted at a suitable position inside the base 8, and a transmission connection relationship between the hydraulic driving motor 7 and the rotary driving spindle 9 can be mounted by using the prior art, which is not described herein again, and the rotary driving spindle 9 does not come off an upper surface of the base 8 during rotation;
the drill rod fastening mechanism 17 is installed on the hydraulic lifting support 18 and can lift along with the lifting of the hydraulic lifting support 18, one end of the drill rod 1 can be connected with the drill rod fastening mechanism 17, and the other end of the drill rod 1 penetrates through the rotary sealing device 2 of the rotary blowout preventer 3 and can be fixedly connected with the rotary driving main shaft 9;
it should be noted that the hydraulic support can move up and down, in this embodiment, the hydraulic support can adopt a two-section hydraulic lifting support in the existing product, and when the hydraulic support descends, an acting force can be applied to the drill rod, and the drill rod can smoothly pass through the rotary sealing device of the rotary blowout preventer through the two-section hydraulic lifting support; the drill rod fastening mechanism 17 can prevent the drill rod from moving relatively in the process of make-up and make-out.
The hydraulic drive motor 7 can drive the rotary drive main shaft 9 to rotate, and the rotary drive main shaft 9 can drive the drill rod 1 to rotate, so that the rotary sealing device 2 of the rotary blowout preventer 3 sleeved on the drill rod 1 is driven to rotate.
It should be noted that the locking mechanism 12 includes two semicircular locking blocks 20, the tail ends of the semicircular locking blocks 20 are hinged through a pin 19, and the front ends are respectively hinged to two ends of a hydraulic cylinder 23 through the pin 19; it may be considered that: the inboard concave structure that is of semicircle formula latch segment 20, base 8 surface forms the protruding structure that matches with semicircle formula latch segment 20 structure, makes semicircle formula latch segment 20 will rotate preventer 3 and lock on base 8.
Furthermore, both sides of the surface of the base 8 are fixedly provided with supporting blocks 21, the supporting blocks 21 and the base 8 are of a detachable structure, the surface of the supporting block 21 is provided with a limiting block 22, and the limiting block 22 can limit the opening of the semicircular locking block 20.
Furthermore, it can be considered in the present invention that a groove is formed on the surface of the base 8, the rotary driving spindle 9 is limited in the groove, the rotary driving spindle 9 forms a pressure seal with the groove through a sealing ring, and realizes relative rotation with the groove through a bearing, a drill rod joint 6 is arranged on the rotary driving spindle 9, and the drill rod 1 can be fixedly connected with the drill rod joint 6 through a thread; specifically, in this embodiment, the groove is an inverted "convex" structure, the surface of the rotary driving spindle 9 is fixed in the groove by an annular pressing plate 11, the annular pressing plate 11 is fixed on the base 8 by a fastening bolt 13, the rotary driving spindle 9 forms a pressure seal by a sealing ring 2728, and the rotary driving spindle 9 achieves its rotation function through two sets of bearings 10.
It should be noted that the drill rod fastening mechanism 17 may fasten one end of the drill rod 1, and the drill rod fastening mechanism 17 may be driven to rotate by the variable frequency motor 15, so as to drive the drill rod 1 to rotate; in this embodiment, it is considered that the drill rod fastening mechanism 17 adopts a hydraulic chuck locking manner in an existing product to lock the drill rod 1, the variable frequency motor 15 may be mounted on the hydraulic lifting support 18, and the drill rod fastening mechanism 17 is connected to the hydraulic lifting support 18 through the bearing 16, so as to reduce a friction force between the variable frequency motor 15 and the hydraulic lifting support 18 when the variable frequency motor 15 drives the drill rod fastening mechanism 17 to rotate.
The rotary blowout preventer of the present invention further includes a pressure test plug 25, wherein a sealing ring 26 is disposed at a lower portion of the pressure test plug 25 to form a compression seal with a sealing surface inside the rotary blowout preventer 3, and an exhaust plug 24 is further disposed on the pressure test plug 25, so that the pressure test plug 25 can be mounted on an upper portion of the rotary blowout preventer 3 to test a water sealing performance of the rotary blowout preventer 3.
The sealing test pressure device for the rotary blowout preventer is applied to a sealing test of the rotary blowout preventer, and comprises the following application steps:
the rotary blowout preventer 3 is arranged on the base 8 and is locked with the base 8 through a locking mechanism 12;
installing the rotary sealing device 2 of the rotary blowout preventer 3 into the rotary blowout preventer 3;
the drill rod fastening mechanism 17 clamps the drill rod 1, the hydraulic lifting support 18 is operated to descend, the drill rod 1 penetrates through the rotary sealing device 2 of the rotary blowout preventer 3, and the lower end of the drill rod 1 reaches the position of the drill rod joint 6 of the rotary driving main shaft 9;
the variable frequency motor 15 drives the drill rod fastening mechanism 17 to rotate, so that the drill rod 2 is in threaded fastening connection with the drill rod joint 6, and the drill rod fastening mechanism 17 is loosened after the fastening connection;
a static water seal test of the rotary sealing device 2 of the rotary blowout preventer 3 was performed: clear water is injected into the rotary blowout preventer 3 through a pressure testing joint 14 on the rotary blowout preventer 3, the rotary blowout preventer is pressurized step by step to test pressure, each stage of pressure is stabilized for 10 minutes and is statically observed, and the pressure drop is qualified when the pressure drop is less than or equal to a preset value;
performing dynamic water sealing test of the rotary sealing device 2 of the rotary blowout preventer 3: the hydraulic driving motor 7 drives the rotary driving main shaft 9 to control the rotating speed to be 20-40 r/min, clear water is injected into the rotary blowout preventer 3 through the pressure testing joint 14 on the rotary blowout preventer 3 and is pressurized step by step to test pressure, each step of pressure is stabilized for 10 min and is statically observed, and the pressure drop is not more than a preset value and is qualified;
and (3) performing a water sealing test of the rotary blowout preventer 3: installing a body pressure test blanking plug 25 into the rotary blowout preventer 3, injecting clear water into the rotary blowout preventer 3 through a pressure test joint 14 on the rotary blowout preventer 3, pressurizing step by step to test pressure, stabilizing the pressure of each step for 10 minutes, and statically observing, wherein the pressure drop is smaller than or equal to a preset value and is qualified;
and after the test is finished, checking the rotary blowout preventer 3 and sealing elements at each part of the rotary sealing device 2 of the rotary blowout preventer 3 according to the water sealing test data, and issuing a pressure test inspection report.
It should be noted that the fixing and connecting manner in the present invention adopts conventional means such as bolts, rivets, welding, etc. which are mature in the prior art, and is not described herein again, but due to the above reasons, the repeated reproduction of those skilled in the art will not be affected.
The present invention has been described in detail with reference to the above examples, but the above description is only for the purpose of describing the preferred embodiments of the present invention, and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (6)
1. The utility model provides a rotatory blowout preventer is with sealed inspection pressure testing device which characterized in that: the rotary blowout preventer comprises a drill rod (1), a base (8), a rotary driving main shaft (9), a locking mechanism (12), a drill rod fastening mechanism (17) and a hydraulic lifting support (18), wherein the rotary blowout preventer (3) is fixedly arranged on the top surface of the base (8), the rotary blowout preventer (3) is assisted to be locked on the top surface of the base (8) by the locking mechanism (12), the rotary driving main shaft (9) is arranged on the base (8) right below the rotary blowout preventer, the rotary driving main shaft (9) can be driven to rotate by a hydraulic driving motor (7), and the rotary driving main shaft (9) does not fall off the upper surface of the base (8) in the rotating process;
the drill rod fastening mechanism (17) is installed on the hydraulic lifting support (18) and can lift along with the lifting of the hydraulic lifting support (18), one end of the drill rod (1) can be connected with the drill rod fastening mechanism (17), and the other end of the drill rod can penetrate through the rotary sealing device (2) of the rotary blowout preventer (3) and can be fixedly connected with the rotary driving main shaft (9);
the hydraulic driving motor (7) can drive the rotary driving main shaft (9) to rotate, and the rotary driving main shaft (9) can drive the drill stem (1) to rotate, so that the rotary sealing device (2) of the rotary blowout preventer (3) sleeved on the drill stem (1) is driven to rotate;
the locking mechanism (12) comprises two semicircular locking blocks (20), the tail ends of the semicircular locking blocks (20) are hinged through pins (19), and the front ends of the semicircular locking blocks (20) are respectively hinged to two ends of a hydraulic cylinder (23) through the pins (19);
the drill rod joint is characterized in that a groove is formed in the surface of the base (8), the surface of the rotary driving main shaft (9) is fixed in the groove through an annular pressing plate (11), the annular pressing plate (11) is fixed on the base (8) through a fastening bolt (13), the rotary driving main shaft (9) forms pressure seal with the groove through a sealing ring, and relative rotation of the rotary driving main shaft and the groove is achieved through a bearing, a drill rod joint (6) is arranged on the rotary driving main shaft (9), and the drill rod (1) can be fixedly connected with the drill rod joint (6).
2. The seal inspection pressure testing device for the rotary blowout preventer as claimed in claim 1, wherein: the rotary blowout preventer (3) is fixedly connected with the base (8) through the locating pin (5), and a sealing steel ring (4) is arranged between the rotary blowout preventer (3) and the base (8).
3. The seal inspection pressure testing device for the rotary blowout preventer as claimed in claim 2, wherein: the inboard sunk structure that is of semicircle formula latch segment (20), base (8) surface forms the protrusion structure that matches with semicircle formula latch segment (20) structure, makes semicircle formula latch segment (20) will rotate preventer (3) and lock on base (8).
4. The seal inspection pressure testing device for the rotary blowout preventer according to claim 3, wherein: the support block (21) is fixedly arranged on two sides of the surface of the base (8), the limiting block (22) is arranged on the surface of the support block (21), and the limiting block (22) can limit the opening degree of the semicircular locking block (20).
5. The seal inspection pressure testing device for the rotary blowout preventer as claimed in claim 1, wherein: the drill rod fastening mechanism (17) can fasten one end of the drill rod (1), and the drill rod fastening mechanism (17) can be driven to rotate by the variable frequency motor (15), so that the drill rod (1) is driven to rotate.
6. The seal inspection pressure testing device for the rotary blowout preventer as claimed in claim 5, wherein: the drill rod fastening mechanism (17) adopts a hydraulic chuck locking mode to lock the drill rod (1).
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| CN202010167326.9A CN111458083B (en) | 2020-03-11 | 2020-03-11 | Sealing test pressure testing device for rotary blowout preventer |
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| CN202010167326.9A CN111458083B (en) | 2020-03-11 | 2020-03-11 | Sealing test pressure testing device for rotary blowout preventer |
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| CN113758698B (en) * | 2021-09-22 | 2023-12-22 | 北京捷杰西科技股份有限公司 | IBOP test device and test method thereof |
| CN117007298B (en) * | 2023-07-28 | 2024-04-12 | 四川宏大安全技术服务有限公司 | Integrated detection test device and detection method for drill bit and rotary blowout preventer |
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