CN210530773U - Novel mechanical seal washing pipe assembly - Google Patents
Novel mechanical seal washing pipe assembly Download PDFInfo
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- CN210530773U CN210530773U CN201920797634.2U CN201920797634U CN210530773U CN 210530773 U CN210530773 U CN 210530773U CN 201920797634 U CN201920797634 U CN 201920797634U CN 210530773 U CN210530773 U CN 210530773U
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Abstract
The utility model discloses a novel mechanical seal washing pipe assembly, which comprises an upper connecting nut, a static ring, a rotating ring anti-rotation pin and a lower connecting nut, wherein the lower end of the upper connecting nut is provided with a pressure negative feedback mechanism, the static ring is arranged under the pressure negative feedback mechanism, the rotating ring is arranged at the lower end of the static ring, the rotating ring anti-rotation pin is connected with the rotating ring by a pin shaft, one end of the rotating ring anti-rotation pin is inserted into the lower connecting nut, the utility model dynamically adjusts the pressure of a hydraulic spring by a pressure negative feedback adjusting mechanism according to a pair of parameters of the end surface abrasion loss and the leakage loss of the rotating ring and the static ring, thereby controlling the leakage of the end surface, effectively reducing the labor intensity in the mounting and dismounting process, further reducing the maintenance time, rapidly adjusting the system, and controlling the response, and having high intelligent and integrated degree, the adaptability to high-pressure drilling fluid is stronger, and the stability is higher.
Description
Technical Field
The utility model relates to an oil drilling high pressure mechanical seal equipment technical field, especially a novel mechanical seal washing pipe assembly.
Background
The flushing pipe assembly in the top driving device for well drilling or well repairing is a special sealing part mainly used for bearing the dynamic and static connection of a gooseneck pipe and a top driving main shaft, and high-pressure drilling mud can be conveyed to the underground through a central channel of the flushing pipe assembly. Drilling fluid with high pressure of dynamic and static sealing, high particle impurity content and strong corrosivity is always the technical problem of the oil industry.
At present, the washpipe assemblies successfully used on top drive equipment at home and abroad have two types: packing box washing pipe assembly and ordinary mechanical seal washing pipe assembly. The packing box washing pipe assembly is difficult to replace, and the dynamic seal of the packing is easy to lose efficacy; the pressure compensation of the movable ring end face and the static ring end face of the ordinary mechanical sealing washpipe assembly is provided through the pretightening force of a spring, the spring force cannot be adjusted in the washpipe using process, so that the end face leakage amount is large when a high-pressure drilling fluid pump is started and stopped, the spring is easy to deform and lose efficacy after long-time use, the end face leakage amount is further increased, and the ordinary mechanical sealing washpipe assembly is difficult to keep the stability of mechanical sealing when the drilling process vibrates, so that the popularization and application of the mechanical sealing washpipe assembly are influenced to a great extent.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems, and designs a novel mechanical seal washing pipe assembly, which solves the problems that the existing packing box washing pipe assembly has high replacement difficulty and the packing dynamic seal is easy to lose efficacy; the pressure compensation of the movable ring end face and the static ring end face of the ordinary mechanical sealing washpipe assembly is provided through the pretightening force of the spring, the spring force cannot be adjusted in the washpipe using process, so that the end face leakage amount is large when a high-pressure drilling fluid pump is started and stopped, the spring is easy to deform and lose efficacy after long-time use, the end face leakage amount is further increased, when the drilling process vibrates, the ordinary mechanical sealing washpipe assembly is difficult to keep the stability of mechanical sealing, and the popularization and the application of the mechanical sealing washpipe assembly are influenced to a great extent.
Realize above-mentioned purpose the utility model discloses a technical scheme does: a novel mechanical seal washing pipe assembly comprises an upper connecting nut, a static ring, a rotating ring anti-rotation pin and a lower connecting nut, wherein a pressure negative feedback mechanism is arranged at the lower end of the upper connecting nut, the static ring is arranged below the pressure negative feedback mechanism, the rotating ring is arranged at the lower end of the static ring, the rotating ring anti-rotation pin is connected with the rotating ring through a pin shaft, and one end of the rotating ring anti-rotation pin is inserted into the lower connecting nut;
the pressure negative feedback mechanism comprises: the device comprises a static piston, a piston cylinder, a pressure sensor, a hydraulic spring assembly, an oil inlet pipeline and an oil return pipeline;
the static piston is connected with the upper connecting nut through a hexagon bolt, the static ring is connected with the piston cylinder through a static ring anti-rotation pin, the static ring can axially move along the static ring anti-rotation pin, the piston cylinder is connected with the static piston through a fixing pin and simultaneously ensures that the piston cylinder can axially move along the fixing pin, and a sealing assembly is arranged between the piston cylinder and the static piston; the upper end and the lower end of the hydraulic spring assembly are respectively connected with the static piston and the piston cylinder through threads, and the oil inlet pipeline and the oil return pipeline are respectively connected with the hydraulic spring assembly;
the hydraulic spring assembly includes: the hydraulic piston comprises a piston cylinder body, a rodless cavity, a hydraulic piston, a piston rod and a rod cavity;
the piston cylinder body is connected with the static piston through threads, the piston rod is connected with the piston cylinder body through threads, and a rodless cavity and a rod cavity of the hydraulic spring assembly are respectively connected with an oil inlet pipeline and an oil return pipeline; the oil inlet pipeline and the oil return pipeline are connected with a hydraulic oil tank through a valve bank, the valve bank is connected with a central processing unit through a cable, and the pressure sensor is connected with the central processing unit.
The upper connecting nut is in sealing connection with the external gooseneck through a first O-shaped sealing ring; a second O-shaped sealing ring is arranged between the upper connecting nut and the static piston, a third O-shaped sealing ring is arranged between the piston cylinder and the static ring, a fourth O-shaped sealing ring is arranged between the movable ring and the lower connecting nut, and the lower connecting nut is in sealing connection with the main shaft through a fifth O-shaped sealing ring.
The end face under the quiet ring and the rotating ring up end all are pressure release sealed end faces, pressure release teeth have been seted up on the end face, a series of closure gap and inflation cavity are formed to the pressure release intertooth space, take place radial swing for the washing pipe device and provide compensation.
The center of the upper end face of the stationary piston is provided with a positioning boss, the center of the upper end face of the stationary ring is provided with a positioning groove, and the positioning boss is matched with the positioning groove to ensure the coaxiality of the parts above the stationary ring.
The rotating ring is matched with the lower connecting nut in a spherical manner, and a gap is reserved between the rotating ring anti-rotation pin and the rotating ring, so that spherical compensation is provided for the radial swing of the top driving drilling device main shaft.
The valve block includes: the proportional pressure reducing overflow valve and the electromagnetic reversing valve are used for converting the pressure of an oil inlet pipeline and the pressure of an oil outlet pipeline, the specific pressure applied to the end faces of the movable ring and the static ring is reduced in the mounting and dismounting process, and the spring force does not need to be overcome in the dismounting process.
The novel mechanical seal washpipe assembly manufactured by the technical scheme of the utility model can dynamically adjust the pressure of the hydraulic spring according to the pair of parameters of the abrasion loss and the leakage quantity of the end faces of the moving ring and the static ring through the pressure negative feedback adjusting mechanism, and when the high-pressure drilling fluid pump is started and stopped, the pressure negative feedback adjusting mechanism can adjust the higher hydraulic spring force according to the low-pressure data transmitted to the central processing unit by the pressure sensor, thereby controlling the leakage quantity of the end faces; when the high-pressure drilling fluid normally circulates, the pressure negative feedback adjusting mechanism can adjust lower hydraulic spring force according to high-pressure data transmitted to the central processing unit by the pressure sensor, so that the contact pressure between the dynamic sealing ring and the static sealing ring is kept in a relatively stable range, a continuous liquid film with certain thickness is kept between end faces, the effects of reducing the temperature and reducing the abrasion loss of the end faces are achieved, the pressure of an oil inlet pipeline and an oil outlet pipeline is changed by the electromagnetic reversing valve, the end face specific pressure applied to the dynamic sealing ring and the static sealing ring is greatly reduced, the labor intensity in the mounting and dismounting process can be effectively reduced, the electromagnetic reversing valve is controlled by the central processing unit, an oil inlet oil return pipeline can be changed, the end face specific pressure is greatly reduced, the dismounting process is labor-saving and convenient, the maintenance time is further reduced, the system has adjustability, the control response is rapid, the integration degree is high, the adaptability to high-pressure drilling fluid is stronger, and the stability is higher.
Drawings
Fig. 1 is a schematic view of a structure of a novel mechanical seal washing pipe assembly.
Fig. 2 is a schematic view of a main-view section structure of a novel mechanical seal washing pipe assembly.
In the figure: 1-connecting a nut; 2-a first O-ring seal; 3-a stationary piston; 4-a second O-ring seal; 5-hexagon head bolt; 6-a fixed pin; 7-a sealing assembly; 8, a piston cylinder; 9-a pressure sensor; 10-a hydraulic spring assembly; 101-a piston cylinder; 102-rodless cavity; 103-hydraulic piston; 104-a piston rod; 105-a rod cavity; 11-oil inlet line; 12-an oil return line; 13-third O-ring seal; 14-a stationary ring; 15-static ring anti-rotation pin; 16-a rotating ring; 17-rotating ring anti-rotation pin; 18-a fourth O-ring seal; 19-lower coupling nut; 20-a fifth O-ring seal; 21-proportional pressure reducing overflow valve; 22-an electromagnetic directional valve; 23-a hydraulic oil tank; 24-a cable; 25-a central processing unit.
Detailed Description
The utility model discloses it is following to combine the attached drawing to be to describe specifically the utility model discloses, as shown in fig. 1-2, a novel mechanical seal washing pipe assembly, including last coupling nut 1, quiet ring 14, rotating ring 16, rotating ring stop pin 17 and lower coupling nut 19, it has pressure negative feedback mechanism to go up coupling nut 1 lower extreme, quiet ring 14 install in under the pressure negative feedback mechanism, rotating ring 16 install in the 14 lower extremes of quiet ring, rotating ring stop pin with the rotating ring adopts the round pin hub connection, rotating ring stop pin one end inserts in the coupling nut down, pressure negative feedback mechanism includes: the static piston 3 is connected with the upper connecting nut 1 through a hexagon head bolt 5, the static ring 14 is connected with the piston cylinder through a static ring anti-rotation pin 15, the static ring 14 can axially move along the static ring anti-rotation pin 15, the piston cylinder 8 is connected with the static piston 3 through a fixing pin 6 and simultaneously ensures that the piston cylinder 8 can axially move along the fixing pin 6, and a sealing assembly 7 is arranged between the piston cylinder 8 and the static piston 3; the upper and lower both ends of hydraulic spring subassembly 10 are connected through the screw respectively with quiet piston 3 and piston cylinder 8, advance oil pipe line 11 with return oil line 12 respectively with hydraulic spring subassembly 10 is connected, hydraulic spring subassembly 10 includes: the hydraulic spring assembly comprises a piston cylinder 101, a rodless cavity 102, a hydraulic piston 103, a piston rod 104 and a rod cavity 105, wherein the piston cylinder 101 is connected with a static piston 3 through threads, the piston rod 104 is connected with the piston cylinder 101 through threads, and the rodless cavity 102 and the rod cavity 105 of the hydraulic spring assembly 10 are respectively connected with an oil inlet pipeline 11 and an oil return pipeline 12; the oil inlet pipeline 11 and the oil return pipeline 12 are connected with a hydraulic oil tank 23 through a valve bank, the valve bank is connected with a central processing unit 25 through a cable 24, the pressure sensor 9 is connected with the central processing unit 25, and the upper connecting nut 1 is in sealing connection with an external gooseneck through a first O-shaped sealing ring 2; a second O-shaped sealing ring 4 is arranged between the upper connecting nut 1 and the static piston 3, a third O-shaped sealing ring 13 is arranged between the piston cylinder 8 and the static ring 14, a fourth O-shaped sealing ring 18 is arranged between the dynamic ring 16 and the lower connecting nut 19, the lower connecting nut 19 is in sealing connection with the main shaft through a fifth O-shaped sealing ring 20, the lower end surface of the static ring 14 and the upper end surface of the dynamic ring 16 are pressure relief sealing end surfaces, pressure relief teeth are arranged on the end surfaces, a series of interception gaps and expansion cavities are formed among the pressure relief teeth to compensate radial swing of the pipe punching device, a positioning boss is arranged in the center of the upper end surface of the static ring 14, a positioning groove is arranged in the center of the upper end surface of the static ring 14, the positioning boss is matched with the positioning groove to ensure the coaxiality of the parts above the static ring 14, and the dynamic ring 16 and the lower connecting nut 19 are in spherical surface fit, and a gap is left between the rotating ring anti-rotation pin 17 and the rotating ring 16, so that spherical compensation is provided for the radial swing of the main shaft of the top drive drilling device, and the valve group comprises: the proportional pressure reducing overflow valve 21 and the electromagnetic directional valve 22 are used for changing the pressure of the oil inlet pipeline 11 and the oil outlet pipeline 22, and reducing the specific pressure applied to the end faces of the movable ring 16 and the static ring 14 in the assembling and disassembling process without overcoming the spring force in the disassembling process.
This embodiment's characteristics do, including last coupling nut 1, quiet ring 14, rotating ring 16, rotating ring anti-rotation pin 17 and coupling nut 19 down, go up coupling nut 1 lower extreme and installed pressure negative feedback mechanism, quiet ring 14 is installed under pressure negative feedback mechanism, and rotating ring 16 is installed in quiet ring 14 lower extreme, rotating ring anti-rotation pin 17 with rotating ring 16 adopts the round pin hub connection, rotating ring anti-rotation pin 17 one end is inserted 19 in the coupling nut down, and pressure negative feedback mechanism includes: the static piston 3 is connected with the upper connecting nut 1 through a hexagon head bolt 5, a static ring 14 is connected with the piston cylinder through a static ring anti-rotation pin 15, the static ring 14 can axially move along the static ring anti-rotation pin 15, the piston cylinder 8 is connected with the static piston 3 through a fixing pin 6 and simultaneously ensures that the piston cylinder 8 can axially move along the fixing pin 6, and a sealing assembly 7 is arranged between the piston cylinder 8 and the static piston 3; both ends are connected with quiet piston 3 and piston cylinder 8 through the screw respectively about hydraulic spring subassembly 10, advance oil pipe line 11 and return oil pipe line 12 and be connected with hydraulic spring subassembly 10 respectively, and hydraulic spring subassembly 10 includes: the hydraulic spring assembly comprises a piston cylinder 101, a rodless cavity 102, a hydraulic piston 103, a piston rod 104 and a rod cavity 105, wherein the piston cylinder 101 is connected with the static piston 3 through threads, the piston rod 104 is connected with the piston cylinder 101 through threads, and the rodless cavity 102 and the rod cavity 105 of the hydraulic spring assembly 10 are respectively connected with an oil inlet pipeline 11 and an oil return pipeline 12; the oil inlet pipeline 11 and the oil return pipeline 12 are connected with the hydraulic oil tank 23 through valve banks, the valve banks are connected with the central processing unit 25 through cables 24, and the pressure sensor 9 is connected with the central processing unit 25; according to the novel mechanical seal washpipe assembly, dynamic pressure adjustment is carried out on a hydraulic spring through a pressure negative feedback adjusting mechanism according to a pair of parameters of abrasion loss and leakage quantity of the end faces of a moving ring and a static ring, and when a high-pressure drilling fluid pump is started and stopped, the pressure negative feedback adjusting mechanism can adjust higher hydraulic spring force according to low-pressure data transmitted to a central processing unit by a pressure sensor, so that the leakage quantity of the end faces is controlled; after the high pressure drilling fluid normal cycle, lower hydraulic pressure spring force can be adjusted according to the high pressure data that pressure sensor conveyed the central processing unit to pressure negative feedback adjustment mechanism, make, contact pressure between the quiet sealing ring keeps in relatively stable within range, thereby keep forming the continuous liquid film that has certain thickness between the terminal surface, play the effect of cooling and reduction terminal surface wearing and tearing volume, can effectual reduction installation dismantle the labour intensity of in-process, further reduced maintenance time, the system itself possesses the adjustability, and control response is rapid, it is intelligent, the degree of integration is high, it is stronger to high pressure drilling fluid adaptability, stability is higher.
The following working principles, detailed connecting means thereof, and the following main descriptions of the working principles and processes are well known in the art, and will be referred to by those skilled in the art for the specific connection and operation sequence of the components in this application.
Example (b): as can be known from the attached figures 1-2 of the specification, the novel mechanical seal washpipe assembly comprises an upper connecting nut 1, a static ring 14, a moving ring 16, a moving ring anti-rotation pin 17 and a lower connecting nut 19, wherein a pressure negative feedback mechanism is arranged at the lower end of the upper connecting nut 1, the static ring 14 is arranged under the pressure negative feedback mechanism, the moving ring 16 is arranged at the lower end of the static ring 14, the moving ring anti-rotation pin 17 is connected with the moving ring 16 through a pin shaft, one end of the moving ring anti-rotation pin 17 is inserted into the lower connecting nut 19, in the pressure negative feedback adjusting mechanism, a hydraulic spring assembly 10 is connected with the static piston 3 and a piston cylinder 8 through threads, the static piston 3 is connected with the piston cylinder 8 through a fixing pin 6, and meanwhile, the fixing pin 6 also serves as a limiting guide mechanism to ensure that the piston cylinder 8 does not rotate relative to the static piston 3 and can axially move. Specifically, the hydraulic spring assembly 10 is connected with the static piston 3 through a piston cylinder body 101 to form a relatively static mechanism, the hydraulic spring assembly 10 is connected with the piston cylinder 8 through a piston rod 104, and the piston rod 104 can freely move axially in a rodless cavity 102 and a rod cavity 105 of the hydraulic spring assembly 10 through a hydraulic piston 103 connected with the piston rod, so that the freedom degree of axial movement of the piston cylinder 8 along the outer surface of the static piston 3 is ensured. The proportional pressure-reducing overflow valve 21 and the electromagnetic directional valve 22 are combined into a valve bank, and the hydraulic spring 10 is communicated with the hydraulic oil tank 23 through the oil inlet pipeline 11 and the oil return pipeline 12; a rodless cavity 102 of the hydraulic spring assembly 10 is connected with an oil inlet pipeline 11, and a rod cavity 105 is connected with an oil return pipeline 12; the valve group is connected with a central processor 25 through a cable 24; the pressure sensor 9 is connected with the central processing unit 25 in a wireless mode or a wired mode, and transmits pressure data in the washing pipe to the central processing unit 25; the central processor 25 processes the received pressure data and adjusts the internal pressure of the hydraulic spring assembly 10 through the cable control valve group, so as to form a dynamic pressure adjusting mechanism, and the purpose is to realize a negative feedback adjusting mechanism for the internal pressure of the flushing pipe;
in addition, the central processing unit 25 controls the electromagnetic directional valve 22 through the cable 24, so that the rodless cavity 102 of the hydraulic spring assembly 10 is connected with the oil return pipeline 12, and the rod cavity 105 is connected with the oil inlet pipeline 11; the proportional pressure reducing overflow valve 21 can provide a lower hydraulic power; the hydraulic piston 103 is driven by hydraulic power to drive the piston rod 104 to move upwards along the axial direction of the inner wall of the piston cylinder 101; the piston rod 104 is fixedly connected with the piston cylinder 8 through threads; when the pressure negative feedback adjusting mechanism is disassembled, the piston cylinder 8 can be automatically lifted up under the driving of lower hydraulic power, so that a space is provided for the static ring 14 to avoid the static ring anti-rotation pin 15 in the axial direction, and the semi-automatic disassembly of the pressure negative feedback adjusting mechanism can be realized through the process;
the upper connecting nut 1, the pressure negative feedback mechanism, the static ring 14, the dynamic ring 16 and the lower connecting nut 19 are hermetically arranged. The upper connecting nut 1 is in sealing connection with an external gooseneck through a first O-shaped sealing ring 2; the upper connecting nut 1 and the static piston 3 are sealed through a second O-shaped sealing ring 4; in the pressure negative feedback mechanism, the static piston 3 and the piston cylinder 8 are sealed and isolated by a sealing component 7; the piston cylinder 8 and the static ring 14 are sealed through a third O-shaped sealing ring 13; the movable ring 16 and the lower connecting nut 19 are sealed through a fourth O-shaped sealing ring 18; the lower connecting nut 19 is in sealing connection with the main shaft through a fifth O-shaped sealing ring 20; the lower end face of the static ring 14 and the upper end face of the dynamic ring 16 are pressure relief sealing end faces, a series of closure gaps and expansion cavities are formed between pressure relief teeth, and when high-pressure drilling fluid passes through the gap between the lower end face of the static ring 14 and the upper end face of the dynamic ring 16, a throttling effect is generated to prevent the drilling fluid from leaking;
when the device works practically, high-pressure drilling fluid can pass through the sealing channel, when a high-pressure drilling fluid pump starts and stops, the pressure negative feedback adjusting mechanism can adjust higher hydraulic spring force according to low-pressure data transmitted to the central processing unit 25 by the pressure sensor 9, the end face specific pressure between the static ring 14 and the moving ring 16 is increased, the cut-off effect of pressure relief sealing of the lower end face of the static ring 14 and the upper end face of the moving ring 16 is further strengthened, and therefore the leakage amount of the end faces is controlled; after the high-pressure drilling fluid normally circulates, the pressure negative feedback adjusting mechanism can adjust lower hydraulic spring force according to high-pressure data transmitted to the central processing unit 25 by the pressure sensor 9, so that a continuous liquid film with a certain thickness can be formed between the end faces, and the effects of reducing the temperature and the abrasion loss of the end faces are achieved.
The pressure negative feedback adjusting function described in the above technical solution is also within the scope of the present invention even if the device uses a mechanical structure to complete the above logic function.
Above-mentioned technical scheme has only embodied the utility model discloses technical scheme's preferred technical scheme, some changes that this technical field's technical personnel probably made to some parts wherein have all embodied the utility model discloses a principle belongs to within the protection scope of the utility model.
Claims (6)
1. A novel mechanical seal washing pipe assembly comprises an upper connecting nut (1), a static ring (14), a rotating ring (16), a rotating ring anti-rotating pin (17) and a lower connecting nut (19), and is characterized in that a pressure negative feedback mechanism is arranged at the lower end of the upper connecting nut (1), the static ring (14) is arranged under the pressure negative feedback mechanism, the rotating ring (16) is arranged at the lower end of the static ring (14), the rotating ring anti-rotating pin (17) is connected with the rotating ring (16) through a pin shaft, and one end of the rotating ring anti-rotating pin (17) is inserted into the lower connecting nut (19);
the pressure negative feedback mechanism comprises: the device comprises a static piston (3), a piston cylinder (8), a pressure sensor (9), a hydraulic spring assembly (10), an oil inlet pipeline (11) and an oil return pipeline (12);
the static piston (3) is connected with the upper connecting nut (1) through a hexagon head bolt (5), the static ring (14) is connected with a piston cylinder through a static ring anti-rotation pin (15), the static ring (14) can move axially along the static ring anti-rotation pin (15), the piston cylinder (8) is connected with the static piston (3) through a fixing pin (6), meanwhile, the piston cylinder (8) can move axially along the fixing pin (6), and a sealing assembly (7) is arranged between the piston cylinder (8) and the static piston (3); the upper end and the lower end of the hydraulic spring assembly (10) are respectively connected with the static piston (3) and the piston cylinder (8) through threads, and the oil inlet pipeline (11) and the oil return pipeline (12) are respectively connected with the hydraulic spring assembly (10);
the hydraulic spring assembly (10) comprising: the hydraulic control system comprises a piston cylinder (101), a rodless cavity (102), a hydraulic piston (103), a piston rod (104) and a rod cavity (105);
the piston cylinder body (101) is connected with the static piston (3) through threads, the piston rod (104) is connected with the piston cylinder body (101) through threads, and a rodless cavity (102) and a rod cavity (105) of the hydraulic spring assembly (10) are respectively connected with an oil inlet pipeline (11) and an oil return pipeline (12); the oil inlet pipeline (11) and the oil return pipeline (12) are connected with a hydraulic oil tank (23) through a valve bank, the valve bank is connected with a central processing unit (25) through a cable (24), and the pressure sensor (9) is connected with the central processing unit (25).
2. The novel mechanical seal washpipe assembly as claimed in claim 1, wherein the upper coupling nut (1) is sealingly connected to an external gooseneck via a first O-ring seal (2); a second O-shaped sealing ring (4) is arranged between the upper connecting nut (1) and the static piston (3), a third O-shaped sealing ring (13) is arranged between the piston cylinder (8) and the static ring (14), a fourth O-shaped sealing ring (18) is arranged between the movable ring (16) and the lower connecting nut (19), and the lower connecting nut (19) is in sealing connection with the main shaft through a fifth O-shaped sealing ring (20).
3. The novel mechanical seal washpipe assembly as claimed in claim 1, wherein the lower end surface of the stationary ring (14) and the upper end surface of the movable ring (16) are pressure relief seal end surfaces, and pressure relief teeth are formed on the end surfaces, and a series of shut-off gaps and expansion cavities are formed between the pressure relief teeth to compensate for radial oscillation of the washpipe device.
4. The novel mechanical seal wash pipe assembly as claimed in claim 1, characterized in that a positioning boss is installed at the center of the upper end face of the stationary piston (3), a positioning groove is formed at the center of the upper end face of the stationary ring (14), and the positioning boss is matched with the positioning groove to ensure the coaxiality of the parts above the stationary ring (14).
5. The novel mechanical seal washpipe assembly as claimed in claim 1, wherein the rotating ring (16) and the lower connecting nut (19) are in spherical fit, and a gap is left between the rotating ring rotation preventing pin (17) and the rotating ring (16) to provide spherical compensation for radial oscillation of the top drive drilling unit main shaft.
6. The novel mechanical seal washpipe assembly as in claim 1, wherein the valve block comprises: the proportional pressure reducing overflow valve (21) and the electromagnetic reversing valve (22), wherein the electromagnetic reversing valve (22) is used for converting the pressure of an oil inlet pipeline (11) and the pressure of an oil outlet pipeline, and can reduce the specific pressure applied to the end faces of the movable ring (16) and the static ring (14) in the assembling and disassembling processes without overcoming the spring force in the disassembling process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920797634.2U CN210530773U (en) | 2019-05-30 | 2019-05-30 | Novel mechanical seal washing pipe assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920797634.2U CN210530773U (en) | 2019-05-30 | 2019-05-30 | Novel mechanical seal washing pipe assembly |
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| CN210530773U true CN210530773U (en) | 2020-05-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110259397A (en) * | 2019-05-30 | 2019-09-20 | 北京石油机械有限公司 | A kind of mechanical sealing washing pipe assembly |
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2019
- 2019-05-30 CN CN201920797634.2U patent/CN210530773U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110259397A (en) * | 2019-05-30 | 2019-09-20 | 北京石油机械有限公司 | A kind of mechanical sealing washing pipe assembly |
| CN110259397B (en) * | 2019-05-30 | 2023-09-29 | 北京石油机械有限公司 | Novel mechanical seal flushing pipe assembly |
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Effective date of registration: 20201204 Address after: 100120 Beijing Xicheng District six laying Kang Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC ENGINEERING TECHNOLOGY R & D Co.,Ltd. Patentee after: BEIJING PETROLEUM MACHINERY Co.,Ltd. Address before: 102206 Shahe Town Innovation Base, Changping District, Beijing No. 9 Energy South Street Patentee before: BEIJING PETROLEUM MACHINERY Co.,Ltd. |