CN113494258A - Remote automatic control ultrahigh pressure fracturing wellhead device - Google Patents
Remote automatic control ultrahigh pressure fracturing wellhead device Download PDFInfo
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- CN113494258A CN113494258A CN202110994957.2A CN202110994957A CN113494258A CN 113494258 A CN113494258 A CN 113494258A CN 202110994957 A CN202110994957 A CN 202110994957A CN 113494258 A CN113494258 A CN 113494258A
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- fracturing
- valve
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- wellhead device
- gasket ring
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1085—Wear protectors; Blast joints; Hard facing
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/04—Casing heads; Suspending casings or tubings in well heads
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/02—Valve arrangements for boreholes or wells in well heads
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
Abstract
The invention relates to the technical field of oil and gas drilling and production, in particular to a remote automatic control ultrahigh pressure fracturing wellhead device, and solves the problems that in the prior art, the wear resistance and the service life of the fracturing wellhead device need to be improved. A remote self-control ultrahigh pressure fracturing wellhead device comprises: the fracturing tree part is formed by connecting a reducing joint, a main control valve, a safety valve, a fracturing head, a top valve and a blind flange from bottom to top in sequence. The gas production tree part and the fracturing tree part are arranged separately, so that the gas production tree part is prevented from bearing fracturing and blowout abrasion, the abrasion of the gas production tree is reduced, and the erosion resistance and abrasion resistance of the device are further enhanced by the surfacing of the high nickel-chromium-molybdenum hard alloy; the fracturing tree part is controlled remotely by the rising stem flat valve driven by the hydraulic oil cylinder, so that manual operation is avoided, the labor intensity of workers is reduced, the equipment burst or leakage during fracturing and the injury of ultrahigh pressure jet flow to human bodies are reduced, and the automation level of the equipment is improved.
Description
Technical Field
The invention relates to the technical field of oil and gas drilling and production, in particular to a remote automatic control ultrahigh pressure fracturing wellhead device.
Background
Shale gas is a new low-permeability oil and gas resource, and has good development prospect under the trend that the oil and gas resources are gradually reduced although the exploitation cost is higher. The shale gas is different from the conventional exploitation methods of vertical wells and self-injection of oil and gas resources, and is obtained after drilling horizontal wells, staged fracturing, open injection and gas recovery; during fracturing and open flow, the wellhead device is required to bear high working pressure and strong abrasion of sand-containing fracturing fluid, and the working pressure and abrasion phenomenon are greatly reduced during gas production.
The well head device that current shale gas well used often unites two into one fracturing and gas production well head device, the device of two unifications of fracturing and gas production is not only bulky, and weight is heavier, and whole price is expensive, and when the gas production tree need bear fracturing operation and blowout, superhigh pressure contains sand fracturing fluid and erodes wearing and tearing to the gas production tree, can shorten the life of gas production tree spare part greatly, the pressure grade that whole gas production tree part need bear risees, and then influences the volume of whole two unifications of fracturing gas production device, price and life.
Therefore, the remote automatic control ultrahigh pressure fracturing wellhead device is provided, the fracturing wellhead device capable of being remotely and hydraulically automatically controlled is arranged, and the fracturing and gas production work is separated according to the drilling and production process flow, so that the wear resistance of the fracturing wellhead device is improved, the safe and durable fracturing wellhead device is realized, the service life of the fracturing wellhead device is prolonged, and the cost of fracturing drilling and production operation is saved.
Disclosure of Invention
The invention aims to provide a remote self-control ultrahigh pressure fracturing wellhead device, which solves the problems that the wear resistance and the service life of the fracturing wellhead device in the prior art need to be improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
a remote self-control ultrahigh pressure fracturing wellhead device comprises:
the fracturing tree part is formed by sequentially connecting a reducing joint, a main control valve, a safety valve, a fracturing head, a top valve and a blind flange from bottom to top, and the inner walls of flow passage holes of the reducing joint, the main control valve, the safety valve, the fracturing head and the top valve are all provided with a high nickel-chromium-molybdenum hard alloy layer in a build-up welding mode;
the oil pipe head is detachably connected with the reducing joint, an anti-abrasion bushing is arranged in a central hole of the oil pipe head, manual wing valves are respectively arranged on two sides of the oil pipe head, threaded flanges are arranged at extending ends of the manual wing valves, pipe plugs are arranged at extending ends of the threaded flanges, and a high nickel-chromium-molybdenum hard alloy layer is welded on the inner wall of a flow channel hole of the oil pipe head in a build-up mode;
and the hydraulic power control cabinet is respectively connected with the main control valve, the safety valve, the fracturing head and the top valve through hydraulic pipelines.
Preferably, a plurality of movable joints are installed on the fracturing head, and the movable joints are connected with a liquid conveying pipeline.
Preferably, the manual wing valves used in the oil pipe head are all sand-proof manual ball screw rising stem flat valves.
Preferably, the main control valve, the safety valve, the fracturing head and the top valve are all sand-prevention type hydraulic drive rising stem flat valves.
Preferably, a plurality of locking components perpendicular to the axial lead of the anti-wear bushing are mounted on the periphery of the top flange of the oil pipe head, and the extending ends of the locking components penetrate through the inner wall of the oil pipe head in a sealing manner and are fixedly connected with the outer wall of the anti-wear bushing.
Preferably, the inner wall of the wear-resistant lining is provided with two annular grooves which are not communicated with each other.
Preferably, the reducing joint is connected with the main control valve through a sealing gasket ring, the oil pipe head is connected with the reducing joint through a sealing gasket ring, the main control valve is connected with the safety valve through a sealing gasket ring, the safety valve is connected with the fracturing head through a sealing gasket ring, the fracturing head is connected with the top valve through a sealing gasket ring, the top valve is connected with the blind flange through a sealing gasket ring, the manual wing valve is connected with the oil pipe head through a sealing gasket ring, and the manual wing valve is connected with the threaded flange through a sealing gasket ring.
Preferably, the sealing gasket ring is arranged in a limiting groove on the end faces of the upper and lower members, and the vertical cross section of the limiting groove is in a trapezoidal structure.
The invention has at least the following beneficial effects:
1. the gas production tree part and the fracturing tree part are arranged separately, so that the gas production tree part is prevented from bearing fracturing and blowout abrasion, the abrasion of the gas production tree is reduced, and compared with the existing fracturing and gas production integrated device, the gas production tree has the advantages that the service life of the gas production tree is prolonged by half; moreover, a layer of high nickel-chromium-molybdenum hard alloy is overlaid on the inner layer of the fracturing wellhead device, so that the erosion resistance and the abrasion resistance of the fracturing wellhead device can be improved by multiple times, and the service life of the fracturing wellhead device can be prolonged by multiple times; the tree fracturing part is remotely controlled by all rising stem flat valves driven by hydraulic cylinders, so that manual operation is avoided, the labor intensity of workers is reduced, equipment bursting or leakage during fracturing can be reduced, the injury of ultrahigh pressure jet flow to human bodies can be reduced, and the automation level of the equipment is improved.
2. The anti-abrasion bushing is arranged in the central hole of the oil pipe head, so that the anti-abrasion performance of the oil pipe head can be improved, the anti-abrasion bushing can be directly replaced after being damaged, the replacement cost is low, and the service life of the oil pipe head is prolonged.
3. The oil pipe head is connected with a manual wing valve, and the manual wing valve is a manual ball screw rising stem flat valve, so that the opening and closing conditions of the valve can be observed remotely, sliding friction is converted into rolling friction through the ball screw, and the operation resistance can be greatly reduced.
4. The tubing head is provided with a tubing hanger and a gas production tree to form a gas production wellhead device; gas production operation can be carried out by controlling a valve on a gas production wellhead device; the oil pipe head combined type mounting structure can greatly improve the specialty, convenience, stability and service life of unidirectional working, realizes a universal oil pipe head structure, and can further reduce the exploitation cost of shale gas.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a frac wellhead configuration;
FIG. 2 is a schematic view of a connection structure of a tubing head, a reducing joint and a main control valve;
FIG. 3 is a schematic view of the wear bushing;
fig. 4 is an enlarged schematic view of the structure of the fracturing head.
In the figure: 1. a tubing head; 2. a reducing joint; 3. a master control valve; 4. a safety valve; 5. a fracturing head; 6. a top valve; 7. a blind flange; 8. a movable joint; 9. an anti-wear bushing; 10. a locking member; 11. a manual wing valve; 12. a threaded flange; 13. and (5) blocking the pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example one
Referring to fig. 1-4, a remote self-controlled ultra-high pressure fracturing wellhead assembly, comprising:
the fracturing tree part is formed by sequentially connecting a reducing joint 2, a main control valve 3, a safety valve 4, a fracturing head 5, a top valve 6 and a blind flange 7 from bottom to top, and the inner walls of flow passage holes of the reducing joint 2, the main control valve 3, the safety valve 4, the fracturing head 5 and the top valve 6 are all provided with a high nickel-chromium-molybdenum hard alloy layer in a surfacing mode; specifically, the main control valve 3 is responsible for daily on-off control of the fracturing wellhead device, and the safety valve 4 is in a normally open standby state; the top valve 6 determines the opening and closing according to the condition of the connecting pipeline; the upper end and the lower end of the fracturing head 5 are provided with neck flanges for connecting up and down;
the oil pipe head 1 is detachably connected with the reducing joint 2, an anti-abrasion bushing 9 is arranged in a central hole of the oil pipe head 1, manual wing valves 11 are respectively arranged on two sides of the oil pipe head 1, a threaded flange 12 is arranged at the extending end of each manual wing valve 11, a pipe plug 13 is arranged at the extending end of each threaded flange 12, and a high nickel-chromium-molybdenum hard alloy layer is welded on the inner wall of a flow channel hole of the oil pipe head 1 in a surfacing mode; specifically, a layer of high nickel-chromium-molybdenum (625) hard alloy is arranged to enhance the erosion resistance and abrasion resistance of the hard alloy, so that the service life of the product is prolonged;
the hydraulic power control cabinet is respectively connected with the hydraulic oil cylinders of the main control valve 3, the safety valve 45 and the top valve 6 through hydraulic pipelines; particularly, the long-distance hydraulic automatic control can be realized, the complexity and the labor of manual operation are saved, the harm to workers caused by leakage of the fracturing device is eliminated, and the safety of the fracturing wellhead device is improved;
further, a plurality of movable joints 8 are mounted on the fracturing head 5, the movable joints 8 are connected with a liquid conveying pipeline, specifically, the movable joints 8 are used for connecting a plurality of external thinner fracturing pipelines so as to guide fracturing liquid to enter the underground, if necessary, a top valve 6 and a blind flange 7 above the fracturing head 5 can be removed, and a main channel is used for connecting an external thick fracturing pipeline to perform fracturing operation;
further, the manual wing valve 11 used in the tubing head 1 is a sand-proof manual ball screw rising stem flat valve, specifically, the setting of the sand-proof manual ball screw rising stem flat valve can remotely observe the opening and closing conditions of the valve, and a sand-proof plate is arranged in the valve cavity to prevent fracturing sand from entering the valve cavity and blocking the valve.
Further, the main control valve 3, the safety valve 4 and the top valve 6 are sand prevention type hydraulic drive rising stem flat valves, specifically, the sand prevention type hydraulic drive rising stem flat valves can carry out remote hydraulic control on a wellhead device, and sand prevention plates are also arranged in the valve cavities to prevent fracturing sand from entering the valve cavities and blocking the valves;
furthermore, a plurality of locking components 10 perpendicular to the axial lead of the anti-abrasion bush 9 are arranged on the periphery of a flange at the top of the oil pipe head 1, the extending ends of the locking components 10 penetrate through the inner wall of the oil pipe head 1 in a sealing manner and are fixedly connected with the outer wall of the anti-abrasion bush 9, and particularly, the anti-abrasion bush 9 is arranged to protect the central hole of the oil pipe head 1 from being abraded by sand-containing fracturing fluid;
further, the inner wall of the wear-resistant lining 9 is provided with two annular grooves which are not communicated with each other, particularly, the arc-shaped grooves on the inner side are not easy to wear, and the wear-resistant lining 9 can be taken out smoothly after being seriously worn;
further, the parts between the reducing joint 2 and the main control valve 3, between the oil pipe head 1 and the reducing joint, between the main control valve 3 and the safety valve 4, between the safety valve 4 and the fracturing head 5, between the fracturing head 5 and the top valve 6, between the top valve 6 and the blind flange 7, between the manual wing valve 11 and the oil pipe head 1, and between the manual wing valve 11 and the threaded flange 12 are all connected through a sealing backing ring and a stud nut, specifically, the whole fracturing wellhead device is prevented from leaking;
furthermore, the sealing gasket ring is arranged in a limiting groove on the end faces of the upper component and the lower component, the vertical cross section of the limiting groove is of a trapezoidal structure, and particularly, the sealing gasket ring is arranged to further improve the sealing performance of the fracturing wellhead device;
in the embodiment, the gas production tree part and the fracturing tree part are separately arranged, so that the condition that the gas production tree part bears fracturing and blowout abrasion is avoided, the abrasion of the gas production tree is reduced, compared with the existing fracturing and gas production integrated device, the service life of the gas production tree is half prolonged, and the erosion resistance and abrasion resistance of the fracturing wellhead device can be improved by multiple times by overlaying a layer of high nickel-chromium-molybdenum (625) hard alloy on the inner layer of the device; the tree fracturing part is controlled remotely by the rising stem flat valve driven by the hydraulic oil cylinder, so that manual operation is avoided, the labor intensity of workers is reduced, equipment bursting or leakage during fracturing and the damage of ultrahigh pressure jet to human bodies can be reduced, and the automation level of the equipment is improved.
Example two
Referring to fig. 1-4, a remote self-controlled ultra-high pressure fracturing wellhead assembly, comprising:
the fracturing tree part is formed by sequentially connecting a reducing joint 2, a main control valve 3, a safety valve 4, a fracturing head 5, a top valve 6 and a blind flange 7 from bottom to top, and the inner walls of flow passage holes of the reducing joint 2, the main control valve 3, the safety valve 4, the fracturing head 5 and the top valve 6 are all provided with a high nickel-chromium-molybdenum hard alloy layer in a surfacing mode;
the oil pipe head 1 is detachably connected with the reducing joint 2, an anti-abrasion bushing 9 is arranged in a central hole of the oil pipe head 1, manual wing valves 11 are respectively arranged on two sides of the oil pipe head 1, a threaded flange 12 is arranged at the extending end of each manual wing valve 11, a pipe plug 13 is arranged at the extending end of each threaded flange 12, and a high nickel-chromium-molybdenum hard alloy layer is welded on the inner wall of a flow channel hole of the oil pipe head 1 in a surfacing mode;
the hydraulic power control cabinet is respectively connected with the hydraulic cylinders of the main control valve 3, the safety valve 4, the fracturing head 5 and the top valve 6 through hydraulic pipelines;
the specific use method of the remote automatic control ultrahigh pressure fracturing wellhead device comprises the following steps:
a first step of fracturing a sand-containing fracturing fluid downhole by using a fracturing tree to fracture a rock formation;
secondly, blowout is carried out by using manual wing valves 11 on two sides of the oil pipe head 1, underground fracturing fluid is pumped out, and part of sand is left in gaps of a rock stratum to play a supporting role so as to allow oil gas to seep out;
thirdly, plugging a sleeve below the oil pipe head 1 by using a bridge plug, removing a fracturing tree part and an anti-abrasion bush 9 above a four-way joint of the oil pipe head 1, installing an oil pipe hanger and a gas production tree with reduced pressure grade and volume and weight above the oil pipe head 1, and removing the bridge plug to carry out gas production;
fourthly, matching the detached fracturing tree part with a new tubing head 1 to form a new fracturing wellhead device for performing new wellhead fracturing operation;
in the example, the tubing head 1 is provided with a tubing hanger and a gas production tree, so that a gas production wellhead device is formed; a gas production tree is arranged above the tubing head 1 to form a gas production wellhead device, and gas production operation can be carried out through valve control on the gas production wellhead device; the oil pipe head 1 combined type mounting structure can greatly improve the convenience and stability during one-way working, realizes a universal oil pipe head 1 structure, and can further reduce the shale gas exploitation cost.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The utility model provides a remote automatic control superhigh pressure fracturing well head device which characterized in that includes:
the fracturing tree part is formed by sequentially connecting a reducing joint (2), a main control valve (3), a safety valve (4), a fracturing head (5), a top valve (6) and a blind flange (7) from bottom to top, and the inner walls of flow passage holes of the reducing joint (2), the main control valve (3), the safety valve (4), the fracturing head (5) and the top valve (6) are all welded with a high nickel-chromium-molybdenum hard alloy layer in a surfacing mode;
the oil pipe head (1), the oil pipe head (1) can be dismantled with reducing joint (2) and be connected, install abrasionproof bush (9) in the centre bore of oil pipe head (1), manual wing valve (11) are installed respectively to the both sides of oil pipe head (1), screw thread formula flange (12) are installed to the extension end of manual wing valve (11), pipe plug (13) are installed to the extension end of screw thread formula flange (12), the high nickel chromium molybdenum hard alloy layer of runner downthehole wall build-up welding of oil pipe head (1);
and the hydraulic power control cabinet is respectively connected with the main control valve (3), the safety valve (4), the fracturing head (5) and the top valve (6) by hydraulic pipelines.
2. A remote self-controlled ultrahigh pressure fracturing wellhead device according to claim 1, characterized in that a plurality of movable joints (8) are installed on the fracturing head (5), and the movable joints (8) are connected with liquid conveying pipelines.
3. A remote self-controlled ultrahigh-pressure fracturing wellhead device according to claim 1, characterized in that the manual wing valves (11) used in the tubing head (1) are sand-proof manual ball screw rising stem flat valves.
4. A remote self-controlled ultrahigh-pressure fracturing wellhead device according to claim 1, characterized in that the main control valve (3), the safety valve (4), the fracturing head (5) and the top valve (6) are all sand-proof type hydraulic drive rising stem flat plate valves.
5. The remote self-control ultrahigh pressure fracturing wellhead device according to claim 1, characterized in that a plurality of locking components (10) perpendicular to the axial line of the wear-resistant bushing (9) are installed around the top flange of the tubing head (1), and the extending ends of the locking components (10) penetrate through the inner wall of the tubing head (1) in a sealing manner and are fixedly connected with the outer wall of the wear-resistant bushing (9).
6. A remote self-controlled ultrahigh pressure fracturing wellhead device according to claim 1, characterized in that the inner wall of the wear-resistant bushing (9) is provided with two annular grooves which are not communicated with each other.
7. A remote self-controlled ultrahigh pressure fracturing wellhead device according to claim 1, wherein the reducing joint (2) is connected with the main control valve (3) through a gasket ring, the tubing head (1) is connected with the reducing joint (2) through a gasket ring, the main control valve (3) is connected with the safety valve (4) through a gasket ring, the safety valve (4) is connected with the fracturing head (5) through a gasket ring, the fracturing head (5) is connected with the top valve (6) through a gasket ring, the top valve (6) is connected with the blind flange (7) through a gasket ring, the hand wing valve (11) is connected with the tubing head (1) through a gasket ring, and the hand wing valve (11) is connected with the threaded flange (12) through a gasket ring.
8. The remote self-controlled ultrahigh pressure fracturing wellhead device according to claim 7, wherein the sealing gasket ring is arranged in the limiting grooves on the end surfaces of the upper and lower members, and the vertical cross section of each limiting groove is in a trapezoidal structure.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110994957.2A CN113494258A (en) | 2021-08-27 | 2021-08-27 | Remote automatic control ultrahigh pressure fracturing wellhead device |
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| CN202110994957.2A CN113494258A (en) | 2021-08-27 | 2021-08-27 | Remote automatic control ultrahigh pressure fracturing wellhead device |
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Cited By (3)
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| CN114941515A (en) * | 2022-06-02 | 2022-08-26 | 西派集团有限公司 | High-sand-prevention-performance fracturing gas production double-acting wellhead |
| CN115199233A (en) * | 2022-09-19 | 2022-10-18 | 华运隆腾机械制造有限公司 | Carbon dioxide drives high pressure gas production well head device |
| CN117166979A (en) * | 2023-11-01 | 2023-12-05 | 江苏鑫鹏晟石油机械有限公司 | Combined fracturing head device for petroleum exploitation |
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Cited By (5)
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| CN115199233B (en) * | 2022-09-19 | 2022-11-22 | 华运隆腾机械制造有限公司 | Carbon dioxide drives high pressure gas production wellhead assembly |
| CN117166979A (en) * | 2023-11-01 | 2023-12-05 | 江苏鑫鹏晟石油机械有限公司 | Combined fracturing head device for petroleum exploitation |
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