CN114688261B - Ultra-high pressure safety throttle valve for testing high-pressure pump of petroleum drilling - Google Patents
Ultra-high pressure safety throttle valve for testing high-pressure pump of petroleum drilling Download PDFInfo
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- CN114688261B CN114688261B CN202210175807.3A CN202210175807A CN114688261B CN 114688261 B CN114688261 B CN 114688261B CN 202210175807 A CN202210175807 A CN 202210175807A CN 114688261 B CN114688261 B CN 114688261B
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- 238000012360 testing method Methods 0.000 title claims abstract description 36
- 238000005553 drilling Methods 0.000 title claims abstract description 27
- 239000003208 petroleum Substances 0.000 title claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 37
- 238000007789 sealing Methods 0.000 claims description 35
- 210000000476 body water Anatomy 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 239000008358 core component Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000010992 reflux Methods 0.000 claims description 2
- 239000000306 component Substances 0.000 claims 1
- 239000012530 fluid Substances 0.000 abstract description 27
- 238000013461 design Methods 0.000 abstract description 13
- 230000003628 erosive effect Effects 0.000 abstract description 7
- 230000002035 prolonged effect Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
- F16K1/38—Valve members of conical shape
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/44—Details of seats or valve members of double-seat valves
- F16K1/443—Details of seats or valve members of double-seat valves the seats being in series
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0254—Construction of housing; Use of materials therefor of lift valves with conical shaped valve members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/08—Guiding yokes for spindles; Means for closing housings; Dust caps, e.g. for tyre valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/04—Means in valves for absorbing fluid energy for decreasing pressure or noise level, the throttle being incorporated in the closure member
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
- Details Of Valves (AREA)
Abstract
The ultra-high pressure safety throttle valve for testing the high-pressure pump of the petroleum drilling comprises a valve body assembly and a valve core assembly, wherein the valve core assembly is arranged in the valve body assembly in a sliding manner; a plurality of valve seats are fixedly arranged in the valve body assembly in a vertically superposed mode, a plurality of valve cores are fixedly arranged on the valve core assembly in a vertically superposed mode, the valve seats are matched with the valve cores to form a multi-stage serial slit throttling cone ring and a backflow cavity, when ultrahigh-pressure fluid flows through the ultrahigh-pressure throttling safety valve, the pressure born by the multi-stage serial slit throttling cone ring and the backflow cavity is greatly reduced through the throttling of the multi-stage serial slit throttling cone ring and the backflow cavity, and therefore the erosion problem of the throttling valve is greatly improved; the structural design of supporting and guiding at two ends of the valve core assembly greatly improves the vibration resistance of the throttle valve; the structural design that the diameter of the liquid outlet side of the gap throttling taper ring is larger than that of the liquid inlet side ensures that the valve core can not block a throttling channel even when the valve core breaks, so that impact damage to a high-pressure pump and test equipment can not be generated.
Description
Technical Field
The invention relates to the technical field of ultrahigh pressure valves for testing high-pressure pumps in petroleum drilling and exploitation, in particular to an ultrahigh pressure safety throttle valve for testing the high-pressure pumps in petroleum drilling.
Background
The high-pressure pump for oil field drilling and exploitation needs to carry out a pressure test in the production process, and an ultrahigh-pressure throttle valve is used as fluid control equipment in the test process to control the pressure and flow output by the high-pressure pump; with the increase of the oil exploitation depth, the output pressure of the high-pressure pump for drilling and exploitation of the existing oil field is up to 140MPa, and when the existing high-pressure throttle valve is used alone under such high fluid pressure, the speed of fluid flowing through the high-pressure throttle valve is extremely high, so that the erosion problem of the high-pressure throttle valve is extremely serious, the service life of the high-pressure throttle valve and an outlet connecting pipeline thereof is extremely short, the high-pressure throttle valve can be replaced only 2-3 months, and the high-pressure throttle valve has high cost, so that the testing cost of the high-pressure pump for drilling and exploitation of the oil field is greatly influenced; in addition, the valve core structure of the existing high-pressure throttle valve is supported by single-end guide, so that fluid impact vibration is easy to generate under the ultra-high pressure working condition, and the equipment cannot work normally; and the vibration of the high-pressure throttle valve can cause the valve core to be broken, the broken valve core instantaneously blocks the throttle channel, and huge impact damage is generated to the high-pressure pump and the testing equipment, so that safety accidents are extremely easy to occur.
In order to solve the problems, in the testing process of the high-pressure pump for oilfield drilling and exploitation, a mode of simultaneously using a plurality of high-pressure throttle valves to work in series is adopted, and the throttle pressure independently born by the single high-pressure throttle valve in the past is shared by the plurality of high-pressure throttle valves in series, so that the fluid speed passing through the high-pressure throttle valve is reduced, the service life of the high-pressure throttle valve is prolonged, and the vibration in the working process is reduced; however, this approach also has several problems: 1. the cost of the high-pressure throttle valves which are operated in series is extremely high; 2. when the fluid pressure and flow are regulated, a plurality of high-pressure throttle valves are required to be synchronously regulated, but the working characteristic of each high-pressure throttle valve has the problem of inconsistency, so that the actual regulation and control are extremely difficult, and the working characteristic test result of the high-pressure pump is inaccurate; 3. because the number of the high-pressure throttle valves is large, the overall working reliability is poor, and equipment accidents are easy to occur; 4. several high-pressure throttles connected in series still present the risk of spool breakage.
Because of the problems, the testing work of the existing high-pressure pump for oil field drilling and exploitation brings great trouble, so how to solve the problems is a great technical problem which needs to be solved in the field of the throttle valve for controlling the ultra-high pressure fluid for testing the high-pressure pump for oil field drilling and exploitation.
Disclosure of Invention
In order to overcome the defects in the background art, the invention discloses an ultrahigh pressure safety throttle valve for testing a high-pressure pump of petroleum drilling, which adopts a plurality of valve seats and valve cores which are in superposed design to form a multi-stage series-arranged gap throttle cone ring and reflux cavity structure so as to gradually reduce the pressure flowing through the throttle valve, correspondingly reduce the fluid speed flowing through the throttle valve, improve the erosion problem of the throttle valve and prolong the service life of the throttle valve; the valve core component adopts a structural design of supporting and guiding at two ends, so that the rigidity of the valve core component is greatly increased, and the vibration resistance of the throttle valve is also greatly improved; the structural design that the diameter of the liquid outlet side of the gap throttling taper ring is larger than that of the liquid inlet side ensures that the throttling channel is not blocked when the valve core is broken, and conversely, the gap of the throttling channel is maximized, so that impact damage to a high-pressure pump and test equipment is avoided, and the running safety of the equipment is ensured; when the valve core assembly moves downwards, the gap of the gap throttling cone ring is enlarged, and the volume of the backflow cavity is kept unchanged, so that the linear flow characteristic and the large flow capacity of the throttle valve are ensured, and the control of the throttle valve is more convenient and accurate; the working pressure of the ultra-high pressure safety throttle valve for testing the petroleum drilling high-pressure pump can exceed 140MPa.
In order to achieve the aim of the invention, the invention adopts the following technical scheme: the ultra-high pressure safety throttle valve for testing the high-pressure pump of the petroleum drilling comprises a valve body assembly and a valve core assembly, wherein the valve core assembly is arranged in the valve body assembly in a sliding manner; a plurality of valve seats are fixedly arranged in the valve body assembly in a vertically superposed mode, a plurality of valve cores are fixedly arranged on the valve core assembly in a vertically superposed mode, the valve seats are matched with the valve cores to form a multi-stage series-arranged gap throttling cone ring and a backflow cavity, the gap throttling cone ring is used for adjusting the flow of fluid flowing through the high-pressure throttling safety valve, the backflow cavity enables the high-pressure fluid to generate whirling vortex so as to attenuate the energy of the high-pressure fluid, and the flow rate of the high-pressure fluid is reduced; when the ultrahigh pressure fluid flows through the ultrahigh pressure throttling safety valve, the pressure and the energy of the ultrahigh pressure fluid are gradually reduced through the throttling of the multi-stage serial slit throttling conical ring and the backflow cavity, so that the pressure born by the slit throttling conical ring and the backflow cavity at each stage is greatly reduced, the corresponding fluid speed flowing through the throttling valve is also greatly reduced, the erosion problem of the throttling valve is greatly improved, and the service life is prolonged; the structural design of supporting and guiding at two ends of the valve core assembly greatly increases the rigidity of the valve core assembly, so that the vibration resistance of the throttle valve is also greatly improved; the structural design that the diameter of the liquid outlet side of the gap throttling taper ring is larger than that of the liquid inlet side ensures that the throttling channel is not blocked when the valve core is broken, and conversely, the gap of the throttling channel is maximized, so that impact damage to a high-pressure pump and test equipment is avoided, and the running safety of the equipment is ensured; when the valve core assembly moves downwards, the gap of the gap throttling cone ring is enlarged, the volume of the backflow cavity is kept unchanged, the structural design characteristics ensure the linear flow characteristic and the large flow capacity of the throttle valve, the control of the throttle valve is more convenient and accurate, and the accuracy of the test result of the working characteristic of the high-pressure pump is ensured.
Further, the valve body assembly comprises a valve body, a valve cover, an upper valve sleeve, a valve seat and an outlet valve seat; the middle of the valve body is provided with a through upper valve sleeve hole, a valve body cavity, a valve seat hole and a valve body water outlet hole in sequence from top to bottom, and the side wall of the valve body cavity is provided with an inclined water inlet; the valve cover is fixedly arranged at the upper end part of the valve body; the upper valve sleeve is fixedly arranged in the upper valve sleeve hole, and the upper end of the upper valve sleeve is abutted against the lower end of the valve cover; the outlet valve seat is fixedly arranged on the lower end surface of the valve seat hole; the valve seat is provided with a plurality of, is fixed to be set up in the upper end of export disk seat with the mode of superpose from top to bottom, and the disk seat upper end of uppermost is contradicted with upper valve pocket lower extreme, and a plurality of disk seat is located the disk seat hole.
Further, the valve core assembly comprises a valve rod, a valve core and an outlet valve core; the valve rod is in a step rod shape; the valve cores are fixedly arranged at the lower part of the valve rod in a vertically superposed mode; the outlet valve core is fixedly arranged at the lower part of the valve core at the lowest end.
Further, the valve seat is in a short circular shape, a valve seat conical hole and a valve seat cavity are sequentially arranged in the middle of the valve seat from top to bottom, and the diameter of the lower part of the valve seat conical hole is larger than that of the upper part of the valve seat conical hole; the valve core is in a short circular shape, the upper part of the outer circle is provided with a valve core conical surface, the lower part of the conical surface of the valve core is provided with a valve core ring, the diameter of the lower part of the conical surface of the valve core is larger than that of the upper part; the length of the revolution line of the conical surface of the valve core is longer than that of the conical hole of the valve seat; the valve seat conical hole is matched with the valve core conical surface to form a gap throttling conical ring; the valve seat cavity is matched with the valve core ring to form a backflow cavity; when the ultrahigh-pressure throttling safety valve works, the valve core assembly moves downwards, the gap of the gap throttling cone ring is enlarged, and the effective working length of the gap throttling cone ring is only related to the length of the revolution line of the valve seat cone hole because the length of the revolution line of the valve core cone surface is larger than the length of the revolution line of the valve seat cone hole, namely the effective working length of the gap throttling cone ring is kept unchanged in the process of enlarging the gap of the gap throttling cone ring, meanwhile, the change of the gap throttling cone ring and the movement stroke of the valve core assembly are in a linear relation, and finally, the linear relation between the flow regulation of the throttle valve and the movement stroke of the valve core assembly is ensured; in addition, when the valve core assembly moves downwards, the valve core conical surface of the upper valve core enters the backflow cavity, and the valve core conical surface of the lower valve core exits the backflow cavity, so that the total volume of the backflow cavity is unchanged, and the throttle valve is ensured to always have higher through-flow capacity; if the valve rod is broken due to the erosion of high-pressure fluid at the upper valve sleeve cavity for a long time, the valve core and the lower half part of the valve rod are automatically moved downwards under the action of the high-pressure fluid until the step surface at the lower end of the valve rod is abutted against the bottom of the valve rod avoidance hole of the outlet valve seat, the movement is stopped, the gap of the gap throttling cone ring reaches the maximum, the throttling valve is at the maximum throttling flow, the problem that the valve core of the existing throttling valve is broken to block a throttling channel is avoided, so that impact damage to a high-pressure pump and test equipment is avoided, and the running safety of the equipment is ensured; when high-pressure fluid flows through the gap throttling conical ring, the radial annular grooves form a plurality of microcosmic vortex in the gap throttling conical ring so that the pressure good energy of the high-pressure fluid is attenuated, and the flow speed of the high-pressure fluid is reduced.
Further, a through ultrahigh-pressure combined sealing hole, a valve rod guide belt hole, an upper valve sleeve valve rod hole and an upper valve sleeve cavity are sequentially formed in the middle of the upper valve sleeve from top to bottom, a plurality of upper valve sleeve cavity water inlets are uniformly distributed on the side wall of the upper valve sleeve cavity, the inclined direction of the upper valve sleeve cavity water inlet is opposite to that of the valve body water inlet, the upper valve sleeve cavity is communicated with the valve body cavity through the upper valve sleeve cavity water inlet, and the inclined direction of the upper valve sleeve cavity water inlet is opposite to that of the valve body water inlet; a plurality of upper valve sleeve sealing ring grooves are arranged on the outer circumference of the upper valve sleeve; a plurality of upper valve sleeve sealing rings are arranged between the valve body and the upper valve sleeve, and the upper valve sleeve sealing rings are arranged in upper valve sleeve sealing ring grooves; an ultra-high pressure combined seal and a valve rod guide belt are arranged between the upper valve sleeve and the valve rod, the ultra-high pressure combined seal is arranged in an ultra-high pressure combined seal hole, the valve rod guide belt is arranged in a valve rod guide belt hole, the upper part of the ultrahigh pressure combined seal is provided with a copper pressing sleeve, and the ultrahigh pressure combined seal, the valve rod guide belt and the upper part of the valve rod are matched to form the upper supporting guide of the valve core assembly.
Further, a valve cover valve rod hole is arranged in the middle of the valve cover, the side wall of the valve cover valve rod hole is provided with a flat key groove; a flat key is arranged on the valve rod; the valve rod passes through the valve rod hole of the valve cover, the flat key is arranged in the flat key groove in a sliding way; the flat key is used for preventing the valve core assembly from rotating in the working process, in addition, after the ultrahigh-pressure throttling safety valve works for a period of time, the rotary valve cover can be adjusted to drive the valve rod to rotate together through the flat key, so that the erosion position of high-pressure fluid to the valve rod is changed, the same position of the valve rod is prevented from being eroded for a long time, and the service life of the valve rod is prolonged.
Further, the outlet valve seat is in a circular thick plate shape, a conical raised head is arranged on the lower plate surface, a valve rod avoiding hole is arranged in the middle of the upper plate surface, a valve rod guide hole is arranged in the middle of the conical raised head, a through valve rod pressure relief hole is arranged at the bottom of the valve rod guide hole, a plurality of valve seat water outlet holes which penetrate through are uniformly distributed around the axis of the valve rod guide hole, and the valve seat water outlet holes are communicated with the valve body water outlet holes; the valve rod is movably arranged in the valve rod guide hole, a valve rod guide sleeve is arranged between the valve rod guide hole and the valve rod bottommost end, and the valve rod guide sleeve is matched with the valve rod lower end to form the lower supporting guide of the valve core assembly; the upper supporting guide and the lower supporting guide of the valve core assembly form a structure with supporting guides at two ends, so that the rigidity of the valve core assembly is greatly increased, and the vibration resistance of the throttle valve is correspondingly greatly improved, thereby solving the problem of breakage of the existing throttle valve caused by vibration of the valve core, and improving the reliability and service life of the throttle valve.
Further, the outlet valve core is in a short circular shape, the outer upper part of the outlet valve core is provided with an outlet valve core conical surface, the lower part of the valve core conical surface is provided with an outlet valve core surface, and the diameter of the lower part of the outlet valve core conical surface is larger than that of the upper part; the length of a revolution line of the conical surface of the outlet valve core is longer than that of the conical hole of the valve seat; the conical hole of the valve seat is matched with the conical surface of the outlet valve core, forming a slit throttling taper ring; the valve seat cavity is matched with the valve core surface of the outlet to form an outlet cavity, and the outlet cavity is communicated with the valve body water outlet hole through the valve rod avoiding hole and the valve seat water outlet hole; the outlet valve core is also provided with an outlet valve core threaded hole, the side wall of the outlet valve core threaded hole is provided with a penetrating anti-loosening pin hole, the outlet valve core is fixedly connected with the valve rod through the outlet valve core threaded hole, and the outlet valve core is prevented from loosening through an anti-loosening pin arranged in the anti-loosening pin hole.
Further, in the valve body assembly, a plurality of valve seat sealing rings are arranged between the valve seat and the valve seat hole of the valve body; in the valve core assembly, a plurality of valve rod sealing rings A are arranged between the valve core at the uppermost end and the valve rod, a plurality of valve rod sealing rings B are arranged between the valve core at the lower part of the valve core at the uppermost end and the valve rod, and a plurality of valve core sealing rings are arranged between the valve cores and between the valve core and the outlet valve core; the multiple sealing ring structural design of the valve body assembly and the valve core assembly greatly improves the internal leakage problem of the throttle valve compared with the existing internal sealing structural design of the throttle valve, thereby reducing the influence of the internal leakage of the throttle valve on flow regulation and ensuring the accuracy and the stability of the flow regulation.
Further, a water outlet lining is fixedly arranged in a water outlet of the valve body, and the water outlet lining is used for solving the problem that the side wall of the water outlet of the valve body is eroded by the outlet fluid of the ultra-high pressure throttling safety valve; the water outlet lining side wall is provided with a dismounting hole, when the water outlet lining is seriously eroded, the water outlet lining can be dismounted and replaced through the dismounting hole, so that the maintenance cost of the ultrahigh pressure throttling safety valve is reduced.
Due to the adoption of the technical scheme, the invention has the following beneficial effects: the invention discloses an ultrahigh pressure safety throttle valve for testing a high-pressure pump of an oil well, which comprises a valve body assembly and a valve core assembly, wherein the valve core assembly is arranged in the valve body assembly in a sliding manner; the valve body assembly is fixedly provided with a plurality of valve seats in a vertically overlapped mode, the valve core assembly is fixedly provided with a plurality of valve cores in a vertically overlapped mode, the valve seats are matched with the valve cores to form a multi-stage serial slit throttling cone ring and a backflow cavity, when ultrahigh-pressure fluid flows through the ultrahigh-pressure throttling safety valve, the pressure and the energy of the ultrahigh-pressure fluid are gradually reduced through throttling of the multi-stage serial slit throttling cone ring and the backflow cavity, so that the pressure born by each stage of slit throttling cone ring and the backflow cavity is greatly reduced, the corresponding fluid speed flowing through the throttling valve is also greatly reduced, the erosion problem of the throttling valve is greatly improved, and the service life is prolonged; the structural design of supporting and guiding at two ends of the valve core assembly greatly increases the rigidity of the valve core assembly, so that the vibration resistance of the throttle valve is also greatly improved; the structural design that the diameter of the liquid outlet side of the gap throttling taper ring is larger than that of the liquid inlet side ensures that when the valve core breaks, the valve core can not block the throttling channel, and conversely, the gap of the throttling channel can be maximized, so that impact damage to a high-pressure pump and test equipment can not be generated, and the running safety of the equipment is ensured; when the valve core assembly moves downwards, the gap of the gap throttling cone ring is enlarged, the volume of the backflow cavity is kept unchanged, and the structural design characteristics ensure the linear flow characteristic and the large flow capacity of the throttle valve, so that the control of the throttle valve is more convenient and accurate; the ultra-high pressure safety throttle valve for testing the petroleum drilling high-pressure pump has the characteristics of high working pressure, long service life, good vibration resistance, safety, reliability and convenient and accurate control, and successfully solves the important technical problem of the throttle valve for controlling the ultra-high pressure fluid for testing the oil field drilling and exploitation high-pressure pump.
Drawings
FIG. 1 is a schematic diagram of an ultra-high pressure safety throttle valve for testing a high-pressure pump in petroleum drilling;
FIG. 2 is a schematic view of a valve body assembly;
FIG. 3 is a schematic illustration of a valve core assembly;
FIG. 4 is an enlarged schematic view of part A;
FIG. 5 is an enlarged schematic view of part B;
FIG. 6 is an enlarged schematic view of part C;
FIG. 7 is a partial D enlarged schematic;
FIG. 8 is a schematic view of a valve body structure;
FIG. 9 is a schematic view of a valve cover structure;
FIG. 10 is a schematic view of the upper valve housing structure;
FIG. 11 is a schematic view of a valve seat structure;
FIG. 12 is a schematic view of an outlet valve seat structure;
FIG. 13 is a schematic view of the outlet valve seat appearance;
FIG. 14 is a schematic diagram of a valve core structure;
Fig. 15 is a schematic view of the outlet valve core.
In the figure: 1. a valve body assembly; 1.1, a valve body; 1.1.1, upper valve sleeve holes; 1.1.2, valve body cavity; 1.1.3, water inlet; 1.1.4 valve seat holes; 1.1.5, a valve body water outlet hole; 1.2, a valve cover; 1.2.1, valve cover and valve stem holes; 1.2.2, a flat key groove; 1.3, upper valve pocket; 1.3.1, upper valve pocket; 1.3.2, a water inlet of the upper valve sleeve cavity; 1.3.3, valve stem holes of the upper valve sleeve; 1.3.4, valve rod guide belt holes; 1.3.5, ultra-high pressure combined seal holes; 1.3.6, upper valve pocket seal ring groove; 1.4, valve seat; 1.4.1, conical hole of valve base; 1.4.2 valve seat chambers; 1.5, outlet valve seat; 1.5.1, valve rod avoiding holes; 1.5.2, valve stem pilot hole; 1.5.4 valve rod pressure relief holes; 1.5.5, valve seat water outlet; 1.6, a water outlet hole lining; 1.7, copper pressing sleeve; 1.8, ultra-high pressure combined sealing; 1.9, a valve rod guide belt; 1.10, an upper valve sleeve sealing ring; 1.11, valve seat sealing ring; 1.12, a valve rod guide sleeve; 2. a valve core assembly; 2.1, valve rod; 2.2, valve core; 2.2.1, conical surface of valve core; 2.2.2, valve core ring; 2.3, outlet valve core; 2.3.1, conical surface of outlet valve core; 2.3.2, outlet spool face; 2.3.3, outlet spool threaded holes; 2.3.5, locking pin holes; 2.4, locking pin; 2.5, flat key; 2.6, valve rod sealing ring A;2.7, valve core sealing ring; 2.8, valve rod sealing ring B; 3. a throttle cone ring; 4. a reflow chamber; 5. and an outlet chamber.
Detailed Description
The invention will be explained in more detail by the following examples, the purpose of which is to protect all technical improvements within the scope of the invention.
An ultra-high pressure safety throttle valve for testing a high-pressure pump of petroleum drilling comprises a valve body assembly 1 and a valve core assembly 2; the valve body assembly 1 comprises a valve body 1.1, a valve cover 1.2, an upper valve sleeve 1.3, a valve seat 1.4 and an outlet valve seat 1.5; the middle of the valve body 1.1 is provided with a through upper valve sleeve hole 1.1.1, a valve body cavity 1.1.2, a valve seat hole 1.1.4 and a valve body water outlet hole 1.1.5 from top to bottom in sequence, and the side wall of the valve body cavity 1.1.2 is provided with an inclined water inlet 1.1.3; the valve cover 1.2 is fixedly arranged at the upper end part of the valve body 1.1; the upper valve sleeve 1.3 is fixedly arranged in the upper valve sleeve hole 1.1.1, and the upper end of the upper valve sleeve 1.3 is abutted against the lower end of the valve cover 1.2; the outlet valve seat 1.5 is fixedly arranged on the lower end surface of the valve seat hole 1.1.4; five valve seats 1.4 are fixedly arranged at the upper end part of the outlet valve seat 1.5 in a vertically superposed mode, the upper end of the uppermost valve seat 1.4 is abutted against the lower end of the upper valve sleeve 1.3, and a plurality of valve seats 1.4 are positioned in the valve seat holes 1.1.4; the valve core assembly 2 comprises a valve rod 2.1, a valve core 2.2 and an outlet valve core 2.3; the valve rod 2.1 is in a step rod shape; the valve cores 2.2 are provided with four valve cores and fixedly arranged at the lower part of the valve rod 2.1 in a vertically superposed mode; the outlet valve core 2.3 is fixedly arranged at the lower part of the valve core 2.2 at the lowest end; the valve core assembly 2 is arranged in the valve body assembly 1 in a sliding way;
the valve seat 1.4 is in a short circular shape, a valve seat conical hole 1.4.1 and a valve seat cavity 1.4.2 are sequentially arranged in the middle of the valve seat 1.4 from top to bottom, and the diameter of the lower part of the valve seat conical hole 1.4.1 is larger than that of the upper part; the valve core 2.2 is in a short circular shape, the outer upper part of the valve core 2.2 is provided with a valve core conical surface 2.2.1, the lower part of the valve core conical surface 2.2.1 is provided with a valve core ring 2.2.2, and the diameter of the lower part of the valve core conical surface 2.2.1 is larger than that of the upper part; the length of the revolution line of the conical surface 2.2.1 of the valve core is longer than that of the revolution line of the conical hole 1.4.1 of the valve seat; valve seat conical hole 1.4.1 and valve core conical surface 2.2.1 a plurality of radial ring grooves are arranged in the array; the valve seat conical hole 1.4.1 is matched with the valve core conical surface 2.2.1 to form a gap throttling conical ring 3; the valve seat cavity 1.4.2 is matched with the valve core ring 2.2.2 to form a backflow cavity 4;
The middle of the upper valve sleeve 1.3 is sequentially provided with a through ultrahigh-pressure combined sealing hole 1.3.5, a valve rod guide belt hole 1.3.4, an upper valve sleeve valve rod hole 1.3.3 and an upper valve sleeve cavity 1.3.1 from top to bottom, the side wall of the upper valve sleeve cavity 1.3.1 is uniformly distributed, a plurality of upper valve sleeve cavity water inlets 1.3.2 are obliquely arranged, the inclination direction of the upper valve sleeve cavity water inlets 1.3.2 is opposite to the inclination direction of the water inlets 1.1.3 of the valve body 1, and the upper valve sleeve cavity 1.3.1 is communicated with the valve body cavity 1.1.2 through the upper valve sleeve cavity water inlets 1.3.2; the outer circumference of the upper valve sleeve 1.3 is provided with a plurality of upper valve sleeve sealing ring grooves 1.3.6; a plurality of upper valve sleeve sealing rings 1.10 are arranged between the valve body 1.1 and the upper valve sleeve 1.3, and the upper valve sleeve sealing rings 1.10 are arranged in the upper valve sleeve sealing ring grooves 1.3.6; an ultrahigh-pressure combined seal 1.8 and a valve rod guide belt 1.9 are arranged between the upper valve sleeve 1.3 and the valve rod 2.1, the ultrahigh-pressure combined seal 1.8 is arranged in an ultrahigh-pressure combined seal hole 1.3.5, the valve rod guide belt 1.9 is arranged in a valve rod guide belt hole 1.3.4, and a copper pressure sleeve 1.7 is arranged at the upper part of the ultrahigh-pressure combined seal 1.8;
The middle of the valve cover 1.2 is provided with the valve cover and valve rod hole 1.2.1, side wall of valve cover and valve rod hole 1.2.1 a flat key groove 1.2.2 is arranged; the valve rod 2.1 is provided with a flat key 2.5; the valve rod 2.1 passes through the valve rod hole 1.2.1 of the valve cover, and the flat key 2.5 is arranged in the flat key groove 1.2.2 in a sliding way;
The outlet valve seat 1.5 is in a circular thick plate shape, a conical raised head is arranged on the lower plate surface, a valve rod avoiding hole 1.5.1 is arranged in the middle of the upper plate surface, a valve rod guide hole 1.5.2 is arranged in the middle of the conical raised head, a through valve rod pressure relief hole 1.5.4 is arranged at the bottom of the valve rod guide hole 1.5.2, and a plurality of through valve seat water outlet holes 1.5.5 are uniformly distributed around the axis of the valve rod guide hole 1.5.2; the lowest end of the valve rod 2.1 is movably arranged in the valve rod guide hole 1.5.2, and a valve rod guide sleeve 1.12 is arranged between the lowest end of the valve rod 2.1 and the valve rod guide hole 1.5.2;
The outlet valve core 2.3 is in a short circular shape, the outer upper part of the outer circle is provided with an outlet valve core conical surface 2.3.1, the lower part of the valve core conical surface 2.2.1 is provided with an outlet valve core surface 2.3.2, and the diameter of the lower part of the outlet valve core conical surface 2.3.1 is larger than that of the upper part; the length of a revolution line of the conical surface 2.3.1 of the outlet valve core is longer than that of the conical hole 1.4.1 of the valve seat; the conical hole 1.4.1 of the valve seat is matched with the conical surface 2.3.1 of the outlet valve core to form a gap throttling conical ring 3; the valve seat cavity 1.4.2 is matched with the outlet valve core surface 2.3.2 to form an outlet cavity 5, and the outlet cavity 5 is communicated with the valve body water outlet hole 1.1.5 through the valve rod avoiding hole 1.5.1 and the valve seat water outlet hole 1.5.5; the outlet valve core 2.3 is also provided with an outlet valve core threaded hole 2.3.3, the side wall of the outlet valve core threaded hole 2.3.3 is provided with a penetrating anti-loosening pin hole 2.3.5, the outlet valve core 2.3 is fixedly connected with the valve rod 2.1 through the outlet valve core threaded hole 2.3.3, and the loosening of the outlet valve core 2.3 is prevented through an anti-loosening pin 2.4 arranged in the anti-loosening pin hole 2.3.5;
In the valve body assembly 1, a valve seat sealing ring 1.11 is arranged between a valve seat 1.4 and a valve seat hole 1.1.4 of the valve body 1.1; in the valve core assembly 2, a valve rod sealing ring A2.6 is arranged between the valve core 2.2 at the uppermost end and the valve rod 2.1, a valve core sealing ring B2.8 is arranged between the valve core 2.2 at the lower part of the valve core 2.2 at the uppermost end and the valve rod 2.1, and a valve core sealing ring 2.7 is arranged between the valve core 2.2 and the outlet valve core 2.3;
A water outlet lining 1.6 is fixedly arranged in the water outlet 1.1.5 of the valve body 1.1.
The invention is not described in detail in the prior art.
Claims (9)
1. The ultra-high pressure safety throttle valve for testing the high-pressure pump of the petroleum drilling comprises a valve body assembly (1) and a valve core assembly (2), wherein the valve core assembly (2) is arranged in the valve body assembly (1) in a sliding manner; the method is characterized in that: a plurality of valve seats (1.4) are fixedly arranged in the valve body assembly (1) in a vertically superposed mode, and a plurality of valve cores (2.2) are fixedly arranged on the valve core assembly (2) in a vertically superposed mode; both ends of the valve core component (2) are supported and guided and are movably arranged in the valve body component (1); the valve seat (1.4) is in a short circular shape, a valve seat conical hole (1.4.1) and a valve seat cavity (1.4.2) are sequentially arranged in the middle of the valve seat (1.4) from top to bottom, and the diameter of the lower part of the valve seat conical hole (1.4.1) is larger than that of the upper part; the valve core (2.2) is in a short circular shape, the upper part of the outer circle of the valve core is provided with a valve core conical surface (2.2.1), the lower part of the valve core conical surface (2.2.1) is provided with a valve core ring (2.2.2), and the diameter of the lower part of the valve core conical surface (2.2.1) is larger than that of the upper part; the length of the revolution line of the conical surface (2.2.1) of the valve core is longer than that of the conical hole (1.4.1) of the valve seat; the valve seat conical hole (1.4.1) and the valve core conical surface (2.2.1) are provided with a plurality of radial ring grooves in an array; the valve seat conical hole (1.4.1) is matched with the valve core conical surface (2.2.1) to form a plurality of stages of slit throttling conical rings (3) which are arranged in series; the valve seat cavity (1.4.2) is matched with the valve core ring (2.2.2) to form a plurality of stages of reflux cavities (4) which are arranged in series; the diameter of the liquid outlet side of the gap throttling taper ring (3) is larger than the diameter of the liquid inlet side; when the valve core assembly (2) moves downwards, the gap of the gap throttling taper ring (3) is enlarged, and the volume of the backflow cavity (4) is kept unchanged.
2. The ultra-high pressure safety throttle valve for testing high pressure pump of petroleum drilling of claim 1, wherein: the valve body assembly (1) comprises a valve body (1.1), a valve cover (1.2), an upper valve sleeve (1.3), a valve seat (1.4) and an outlet valve seat (1.5); an upper valve sleeve hole (1.1.1), a valve body cavity (1.1.2), a valve seat hole (1.1.4) and a valve body water outlet hole (1.1.5) which penetrate through are sequentially formed in the middle of the valve body (1.1) from top to bottom, and an inclined water inlet (1.1.3) is formed in the side wall of the valve body cavity (1.1.2); the valve cover (1.2) is fixedly arranged at the upper end part of the valve body (1.1); the upper valve sleeve (1.3) is fixedly arranged in the upper valve sleeve hole (1.1.1), and the upper end of the upper valve sleeve (1.3) is abutted against the lower end of the valve cover (1.2); the outlet valve seat (1.5) is fixedly arranged on the lower end surface of the valve seat hole (1.1.4); the valve seats (1.4) are provided with a plurality of, are fixedly arranged at the upper end part of the outlet valve seat (1.5) in a vertically superposed mode, the upper end of the valve seat (1.4) at the uppermost end is abutted against the lower end of the upper valve sleeve (1.3), and the valve seats (1.4) are positioned in the valve seat holes (1.1.4).
3. The ultra-high pressure safety throttle valve for testing high pressure pump of petroleum drilling of claim 2, wherein: the valve core assembly (2) comprises a valve rod (2.1), a valve core (2.2) and an outlet valve core (2.3); the valve rod (2.1) is in a step rod shape; the valve cores (2.2) are fixedly arranged at the lower part of the valve rod (2.1) in a mode of being overlapped up and down; the outlet valve core (2.3) is fixedly arranged at the lower part of the lowest valve core (2.2).
4. The ultra-high pressure safety throttle valve for testing high pressure pump of petroleum drilling of claim 3, wherein: the middle of the upper valve sleeve (1.3) is sequentially provided with a through ultrahigh-pressure combined sealing hole (1.3.5), a valve rod guide belt hole (1.3.4), an upper valve sleeve valve rod hole (1.3.3) and an upper valve sleeve cavity (1.3.1) from top to bottom, the side wall of the upper valve sleeve cavity (1.3.1) is uniformly distributed and is obliquely provided with a plurality of upper valve sleeve cavity water inlets (1.3.2), the inclination direction of the upper valve sleeve cavity water inlets (1.3.2) is opposite to the inclination direction of the water inlets (1.1.3) of the valve body (1.1), and the upper valve sleeve cavity (1.3.1) is communicated with the valve body cavity (1.1.2) through the upper valve sleeve cavity water inlets (1.3.2); the outer circumference of the upper valve sleeve (1.3) is provided with a plurality of upper valve sleeve sealing ring grooves (1.3.6); a plurality of upper valve sleeve sealing rings (1.10) are arranged between the valve body (1.1) and the upper valve sleeve (1.3), and the upper valve sleeve sealing rings (1.10) are arranged in upper valve sleeve sealing ring grooves (1.3.6); an ultrahigh-pressure combined seal (1.8) and a valve rod guide belt (1.9) are arranged between the upper valve sleeve (1.3) and the valve rod (2.1), the ultrahigh-pressure combined seal (1.8) is arranged in an ultrahigh-pressure combined seal hole (1.3.5), the valve rod guide belt (1.9) is arranged in a valve rod guide belt hole (1.3.4), and a copper pressure sleeve (1.7) is arranged on the upper portion of the ultrahigh-pressure combined seal (1.8).
5. The ultra-high pressure safety throttle valve for testing high pressure pump of petroleum drilling of claim 3, wherein: a valve cover valve rod hole (1.2.1) is arranged in the middle of the valve cover (1.2), and a flat key groove (1.2.2) is arranged on the side wall of the valve cover valve rod hole (1.2.1); a flat key (2.5) is arranged on the valve rod (2.1); the valve rod (2.1) passes through the valve cover valve rod hole (1.2.1), and the flat key (2.5) is arranged in the flat key groove (1.2.2) in a sliding way.
6. The ultra-high pressure safety throttle valve for testing high pressure pump of petroleum drilling of claim 3, wherein: the outlet valve seat (1.5) is in a circular thick plate shape, a conical raised head is arranged on the lower plate surface, a valve rod avoiding hole (1.5.1) is arranged in the middle of the upper plate surface, a valve rod guide hole (1.5.2) is arranged in the middle of the conical raised head, a through valve rod pressure relief hole (1.5.4) is arranged at the bottom of the valve rod guide hole (1.5.2), and a plurality of through valve seat water outlet holes (1.5.5) are uniformly distributed around the axis of the valve rod guide hole (1.5.2); the lowest end of the valve rod (2.1) is movably arranged in the valve rod guide hole (1.5.2), and a valve rod guide sleeve (1.12) is arranged between the lowest end of the valve rod (2.1) and the valve rod guide hole (1.5.2).
7. The ultra-high pressure safety throttle valve for testing high pressure pump of petroleum drilling of claim 3, wherein: the outlet valve core (2.3) is in a short circular shape, the outer upper part of the outer circle is provided with an outlet valve core conical surface (2.3.1), the lower part of the valve core conical surface (2.2.1) is provided with an outlet valve core surface (2.3.2), and the diameter of the lower part of the outlet valve core conical surface (2.3.1) is larger than that of the upper part; the length of a revolution line of the conical surface (2.3.1) of the outlet valve core is longer than that of the conical hole (1.4.1) of the valve seat; the valve seat conical hole (1.4.1) is matched with the outlet valve core conical surface (2.3.1) to form a gap throttling conical ring (3); the valve seat cavity (1.4.2) is matched with the outlet valve core surface (2.3.2) to form an outlet cavity (5), and the outlet cavity (5) is communicated with the valve body water outlet hole (1.1.5) through the valve rod avoiding hole (1.5.1) and the valve seat water outlet hole (1.5.5); the outlet valve core (2.3) is further provided with an outlet valve core threaded hole (2.3.3), the side wall of the outlet valve core threaded hole (2.3.3) is provided with a penetrating anti-loosening pin hole (2.3.5), the outlet valve core (2.3) is fixedly connected with the valve rod (2.1) through the outlet valve core threaded hole (2.3.3), and the outlet valve core (2.3) is prevented from loosening through an anti-loosening pin (2.4) arranged in the anti-loosening pin hole (2.3.5).
8. The ultra-high pressure safety throttle valve for testing high pressure pump of petroleum drilling of claim 3, wherein: in the valve body assembly (1), a valve seat sealing ring (1.11) is arranged between a valve seat (1.4) and a valve seat hole (1.1.4) of the valve body (1.1); in the valve core assembly (2), a valve rod sealing ring A (2.6) is arranged between the valve core (2.2) at the uppermost end and the valve rod (2.1), a valve core (2.2) at the lower part of the valve core (2.2) at the uppermost end and the valve rod (2.1) are provided with a valve rod sealing ring B (2.8), and valve core sealing rings (2.7) are arranged between the valve cores (2.2) and the outlet valve core (2.3).
9. The ultra-high pressure safety throttle valve for testing high pressure pump of petroleum drilling of claim 7, wherein: a water outlet lining (1.6) is fixedly arranged in a water outlet (1.1.5) of the valve body (1.1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210175807.3A CN114688261B (en) | 2022-02-25 | 2022-02-25 | Ultra-high pressure safety throttle valve for testing high-pressure pump of petroleum drilling |
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| CN202210175807.3A CN114688261B (en) | 2022-02-25 | 2022-02-25 | Ultra-high pressure safety throttle valve for testing high-pressure pump of petroleum drilling |
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| CN114688261B true CN114688261B (en) | 2024-08-30 |
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| CN116136160B (en) * | 2023-04-19 | 2023-06-27 | 贵州航天凯山石油仪器有限公司 | Valve and method for controlling underground carbon dioxide flow |
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| DE3744424A1 (en) * | 1987-12-29 | 1989-07-13 | Wilhelm Odendahl | Throttle valve |
| CN102979923A (en) * | 2012-11-30 | 2013-03-20 | 无锡智能自控工程股份有限公司 | Reduced pressure regulating valve special for reflowing of liquid oxygen pump |
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| US4634095A (en) * | 1985-07-26 | 1987-01-06 | Taylor Julian S | Multiple stage choke valve |
| CN102954226B (en) * | 2011-08-18 | 2014-10-29 | 孙杰 | Pressure-reducing throttling valve |
| CN203627964U (en) * | 2013-11-20 | 2014-06-04 | 无锡智能自控工程股份有限公司 | High-pressure micro-flow string type regulating valve |
| CN204061919U (en) * | 2014-08-08 | 2014-12-31 | 浙江精杰实业有限公司 | A kind of plunger multistage high-differential-pressure regulating valve |
| CN105987221A (en) * | 2015-01-30 | 2016-10-05 | 浙江德卡控制阀仪表有限公司 | Four-stage depressurization regulating valve |
| CN208457225U (en) * | 2018-06-28 | 2019-02-01 | 安徽安源流体控制设备有限公司 | A kind of reducing-and-cooling plant feed-regulating valve |
| CN209325066U (en) * | 2018-12-27 | 2019-08-30 | 北京星光沃特传动研究所 | A kind of automatic minimum flow valve |
| CN209743620U (en) * | 2019-01-18 | 2019-12-06 | 杭州华惠阀门有限公司 | Rotary guide type high pressure difference water supply control valve |
| CN111779842A (en) * | 2020-07-13 | 2020-10-16 | 吴忠中创自控阀有限公司 | Regulating valve for hot-melt salt |
| CN213954350U (en) * | 2020-10-30 | 2021-08-13 | 南京自控仪表有限公司 | Adjusting angle valve of hydrocracking device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3744424A1 (en) * | 1987-12-29 | 1989-07-13 | Wilhelm Odendahl | Throttle valve |
| CN102979923A (en) * | 2012-11-30 | 2013-03-20 | 无锡智能自控工程股份有限公司 | Reduced pressure regulating valve special for reflowing of liquid oxygen pump |
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| CN114688261A (en) | 2022-07-01 |
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Effective date of registration: 20240802 Address after: 434020 Longshan Temple Street, Jingzhou District, Jingzhou, Hubei Applicant after: SINOPEC SIJI PETROLEUM MACHINERY Co.,Ltd. Country or region after: China Applicant after: SINOPEC OILFIELD EQUIPMENT Corp. Address before: 434024 No.1 longshansi street, Jingzhou District, Jingzhou City, Hubei Province Applicant before: SINOPEC SIJI PETROLEUM MACHINERY Co.,Ltd. Country or region before: China |
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