CN111022017A - Manual fracturing and production wellhead device and using method thereof - Google Patents
Manual fracturing and production wellhead device and using method thereof Download PDFInfo
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- CN111022017A CN111022017A CN201911159578.0A CN201911159578A CN111022017A CN 111022017 A CN111022017 A CN 111022017A CN 201911159578 A CN201911159578 A CN 201911159578A CN 111022017 A CN111022017 A CN 111022017A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000009434 installation Methods 0.000 claims abstract description 24
- 241000191291 Abies alba Species 0.000 claims abstract description 14
- 238000005507 spraying Methods 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims description 67
- 230000007246 mechanism Effects 0.000 claims description 44
- 230000005540 biological transmission Effects 0.000 claims description 38
- 238000004146 energy storage Methods 0.000 claims description 11
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 239000004519 grease Substances 0.000 claims description 8
- 210000004907 gland Anatomy 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 4
- 239000003129 oil well Substances 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 210000000664 rectum Anatomy 0.000 abstract description 3
- 238000004891 communication Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000010793 Steam injection (oil industry) Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B33/0422—Casing heads; Suspending casings or tubings in well heads a suspended tubing or casing being gripped by a slip or an internally serrated member
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
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- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Valve Housings (AREA)
Abstract
The invention relates to the technical field of oil production well mouths, in particular to a manual fracturing and production well mouth device and a using method thereof. According to the invention, after the four-way pipe head and the master control gate valve are integrated, the requirement of fracturing operation can be realized, meanwhile, the pressure control can be carried out on the casing pipe channel, and the Christmas tree installation operation can be completed under the condition of controllable casing pressure by controlling the opening and closing of the valve plate arranged in the four-way pipe head during the subsequent inverted discharge and self-spraying production; the use of manual formula fracturing and production wellhead assembly has reduced the configuration quantity of gate valve on the perpendicular latus rectum in well head top, has reduced the whole height of production tree by a wide margin to simplify the dismouting flow among the operation process, the operation of the later stage production of being convenient for.
Description
Technical Field
The invention relates to the technical field of oil production well mouths, in particular to a manual fracturing and production well mouth device and a using method thereof.
Background
In recent years, Xinjiang oil fields have achieved tremendous achievements in the fields of exploration and development, and billions of ton-level large oil and gas fields such as Mar lake oil fields, Gibbage and the like are discovered in succession, and meanwhile, curtains for oil production and fight are also opened.
Because the oil field block belongs to an unconventional oil and gas reservoir, a horizontal well volume fracturing technology is required to be adopted in a development process, and a fracturing wellhead device +2 large-drift-diameter gate valves (namely a main control gate valve) and a fracturing tree structure are adopted for fracturing in the current fracturing operation process. And after the fracturing drilling plug operation is completed, closing the large-drift-diameter gate valve, and installing a Christmas tree with the same specification as the fracturing wellhead to perform reverse discharge and production of fracturing fluid. Because the gate valve can not be disassembled under the condition of not controlling the pressure of a shaft, the gate valve with 1 or 2 large drift diameters always exists on the vertical drift diameter of a wellhead device and the Christmas tree, the integral height of the Christmas tree is increased, great trouble is brought to later-stage production operation, and huge waste of resources of the Christmas tree is also caused.
Disclosure of Invention
The invention provides a manual fracturing and production wellhead device and a using method thereof, overcomes the defects of the prior art, and can effectively solve the problem that the existing Christmas tree is high in overall height.
The technical scheme of the invention is realized by the following measures: a manual fracturing and production wellhead device comprises an oil pipe head reducing connector, a first gate valve, a small four-way joint and a pressure control oil pipe head four-way joint, wherein the pressure control oil pipe head four-way joint comprises an oil pipe head four-way joint and a main control gate valve;
the main control gate valve comprises a valve plate and a bevel gear transmission mechanism capable of controlling the valve plate to open and close an oil pipe head four-way main channel, a left port and a right port which are bilaterally symmetrical are arranged on the oil pipe head four-way channel between the front port and the rear port of the oil pipe head four-way channel and the lower part of the upper port of the oil pipe head four-way channel, the left port and the right port are communicated through the oil pipe head four-way main channel, the valve plate penetrates through the right port of the oil pipe head four-way channel from the oil pipe head four-way channel, and the fixed end of the bevel gear transmission mechanism.
The following is further optimization or/and improvement of the technical scheme of the invention:
the left port, the front port, the right port and the rear port of the four-way pipe head are distributed in a staggered manner on the horizontal plane; an installation ring groove is arranged in the four-way pipe head corresponding to the left port and the right port, and a valve seat is fixedly installed in the installation ring groove; the inner diameter of the valve seat is the same as that of the oil pipe head cross joint at the joint of the valve seat, the left end of the valve seat is provided with a left through hole coaxially corresponding to the left port of the oil pipe head cross joint, the right end of the valve seat is provided with a right through hole coaxially corresponding to the right port of the oil pipe head cross joint, the valve plate transversely penetrates through the valve seat through the left through hole and the right through hole, and the valve plate is provided with a valve hole which enables the upper port of the oil pipe head cross joint to be communicated with the lower port of.
The left valve cover for covering the left port of the oil pipe head four-way joint is fixedly installed on the outer side of the left port of the oil pipe head four-way joint in a sealing mode, the right valve cover for covering the right port of the oil pipe head four-way joint is fixedly installed on the outer side of the right port of the oil pipe head four-way joint in a sealing mode, a left stepped hole which is narrow in left and wide in right is transversely arranged on the left valve cover and is axially and correspondingly communicated with the left through hole, a right stepped hole which is wide in left and narrow in right is transversely arranged on the right valve cover and is axially and correspondingly communicated with the right through hole, and the valve plate; the connecting device comprises a connecting sleeve, the right part of the connecting sleeve is fixedly connected with the left end of the left valve cover in a sealing mode, and the left part of the connecting sleeve is fixedly connected with the right part of the bevel gear transmission mechanism.
The left part of the connecting sleeve is fixedly connected with an installation box surrounding the bevel gear transmission mechanism, the installation box comprises a left groove body with a rightward opening and a right groove body with a leftward opening, the right groove body and the left part of the connecting sleeve are fixedly installed, the right lower end of the left groove body and the left lower end of the right groove body are fixedly installed, an installation cavity for accommodating the bevel gear transmission mechanism is formed between the left groove body and the right groove body, and the bevel gear transmission mechanism is arranged in the installation cavity; the bevel gear transmission mechanism comprises a bevel gear transmission assembly and a ball screw pair; the bevel gear transmission component comprises a bevel gear and a rotating rod, and the bevel gear is fixed at the bottom of the rotating rod; the ball screw pair comprises a screw and a nut which is arranged on the screw in a matched mode, and the right end of the screw is fixedly arranged with the left end of the valve plate; a vertical hole capable of enabling the rotating rod to penetrate is formed between the upper right end of the left groove body and the upper left end of the right groove body, a bearing is mounted outside the rotating rod on the inner side of the mounting box above the bevel gear, the lead screw is transversely arranged in the mounting cavity, the nut is mounted in the mounting box through a nut seat, a rotating cylinder taking the lead screw as a rotating shaft is mounted on the outer side of the nut seat, a gear portion meshed with the bevel gear is arranged at the left end of the rotating cylinder, and the bevel gear is connected with the left end of the rotating cylinder in a matched mode through the gear portion.
The upper part of the rotating rod extends out of the mounting box from the vertical hole, and a hand wheel for rotating the rotating rod is arranged at the top of the rotating rod; an indication rod is axially fixed at the left end of the lead screw, an indication ring is arranged at the left end of the indication rod, a shielding cover which is coaxial with the lead screw and can cover the indication rod is arranged on the left groove body, and an observation port at the position of the indication ring is arranged on the shielding cover; a protective valve cover is arranged on the right valve cover outside the right stepped hole.
The narrow diameter section of the left stepped hole is provided with a left sealing groove with an opening facing to the left, a sealing element is fixedly arranged in the left sealing groove, the sealing element adopts spring energy storage sealing filler or a spring energy storage sealing ring, and a sealing gland is fixedly arranged in the left sealing groove at the outer end of the sealing element; a right sealing groove with a rightward opening is formed in the narrow diameter section of the right stepped hole, a sealing element is fixedly installed in the right sealing groove, and a sealing gland is fixedly installed in the right sealing groove at the outer end of the sealing element; at least one sealing ring is arranged between the outer sides of the valve seats above and below the valve plate and the inner side of the four-way pipe of the oil pipe head.
Radial locking holes are distributed at the upper port of the four-way joint of the tubing head along the circumference, a jackscrew locking mechanism capable of preventing the tubing hanger from moving upwards is fixedly arranged in the radial locking holes, and a sealing element capable of being lifted out of a well mouth together with the tubing hanger is fixedly arranged on the outer side of the tubing hanger below the jackscrew locking mechanism; and radial grease injection holes and radial pressure relief holes are circumferentially distributed at the lower end of the four-way joint of the tubing head.
The second technical scheme of the invention is realized by the following measures: the use method of the manual fracturing and production wellhead device comprises the following steps: before fracturing, fixedly connecting a pressure control tubing head four-way joint of the device with a wellhead casing flange, and installing a fracturing tree with the same specification as the pressure control tubing head four-way joint at an upper port of the pressure control tubing head four-way joint for fracturing operation; after fracturing is finished, a hand wheel on the bevel gear transmission mechanism is rotated, a main control gate valve arranged in the four-way pipe head is closed, a fracturing tree is disassembled, a well is sealed, a Christmas tree with the pressure level suitable for the pressure level in the well is directly installed at the upper port of the four-way pipe head, and when reverse drainage and production operation are needed, the hand wheel on the bevel gear transmission mechanism is rotated, the main control gate valve arranged in the four-way pipe head is opened, and reverse drainage and self-spraying production of fracturing fluid are carried out; and when the rotary pumping is needed in the later period, closing a main control gate valve arranged in the four-way of the tubing head, dismantling the Christmas tree, completely opening the main control gate valve arranged in the four-way of the tubing head under the coordination of a pressure operation device, and putting in an oil well pump and an oil pipe, when the last oil pipe is put down, connecting the tubing hanger and sealing the tubing hanger in the four-way of the tubing head, installing the reducing joint and the parts of the tubing head, and then, turning to mechanical production.
According to the invention, after the four-way pipe head and the master control gate valve are integrated, the requirement of fracturing operation can be realized, meanwhile, the pressure control can be carried out on the casing pipe channel, and the Christmas tree installation operation can be completed under the condition of controllable casing pressure by controlling the opening and closing of the valve plate arranged in the four-way pipe head during the subsequent inverted discharge and self-spraying production; the use of manual formula fracturing and production wellhead assembly has reduced the configuration quantity of gate valve on the perpendicular latus rectum in well head top, has reduced the whole height of production tree by a wide margin to simplify the dismouting flow among the operation process, the operation of the later stage production of being convenient for.
Drawings
FIG. 1 is a left side view partially cross-sectional structural schematic diagram of the present invention.
FIG. 2 is a schematic sectional view of a cross-section of a pressure control tubing head.
The codes in the figures are respectively: 1 is a pressure control tubing head four-way joint, 2 is a tubing head reducing joint, 3 is a first gate valve, 4 is a small four-way joint, 5 is a production gate valve, 6 is a test gate valve, 7 is a casing gate valve, 8 is a tubing hanger, 9 is a bevel gear transmission mechanism, 10 is a valve plate, 11 is a front port, 12 is a left port, 13 is a right port, 14 is a tubing head four-way joint, 15 is a tubing head four-way main channel, 16 is a valve seat, 17 is a BT sealing ring, 18 is a radial pressure relief hole, 19 is a valve hole, 20 is a left valve cover, 21 is a right valve cover, 22 is a left stepped hole, 23 is a right stepped hole, 24 is a connecting sleeve, 25 is a left groove body, 26 is a right groove body, 27 is an installation cavity, 28 is a bevel gear, 29 is a rotating rod, 30 is a lead screw, 31 is a nut, 32 is a bearing, 33 is a rotating cylinder, 34 is a gear part, 35 is a hand wheel, 36 is an indicating rod, 37 is an indicating ring, 40 is a sealing element, 41 is a sealing gland, 42 is a sealing ring, 43 is a jackscrew locking mechanism, 44 is a radial grease injection hole, and 45 is a nut seat.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention.
In the present invention, for convenience of description, the description of the relative positional relationship of the components is described according to the layout pattern of fig. 2 in the specification, such as: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of fig. 2 of the specification.
The invention is further described with reference to the following examples and figures:
as shown in attached figures 1 and 2, the manual fracturing and production wellhead device comprises an oil pipe head reducing joint 2, a first gate valve 3, a small four-way joint 4 and a pressure control oil pipe head four-way joint 1, wherein the pressure control oil pipe head four-way joint 1 comprises an oil pipe head four-way joint 14 and a main control gate valve, the pressure control oil pipe head four-way joint 1, the oil pipe head reducing joint 2, the first gate valve 3 and the small four-way joint 4 are fixedly connected from bottom to top in sequence, production gate valves 5 are fixedly connected to ports on the front side and the rear side of the small four-way joint 4 respectively, a test gate valve 6 is fixedly communicated with an upper port of the small four-way joint 4, casing gate valves 7 are fixedly connected to ports on the front side and the rear side of the oil pipe head four-way joint 14 above a valve plate 10 respectively, an oil pipe hanger 8 is;
the main control gate valve comprises a valve plate 10 and a bevel gear transmission mechanism 9 capable of controlling the valve plate 10 to open and close an oil pipe head four-way main channel 15, a left port 12 and a right port 13 which are bilaterally symmetrical are arranged on the oil pipe head four-way 14 between the upper portion of a front port 11 and a rear port of the oil pipe head four-way 14 and the lower portion of an upper port of the oil pipe head four-way 14, the left port 12 and the right port 13 are communicated through the main channel of the oil pipe head four-way 14, the valve plate 10 penetrates through the right port 13 of the oil pipe head four-way 14 from the left port 12 of the oil pipe head four-way 14, and the fixed end of the bevel gear transmission mechanism 9 is fixedly.
The oil collecting pipe head four-way valve integrates an oil pipe head four-way valve 14 and a main control gate valve, a valve plate 10 of the main control gate valve is arranged in the oil pipe head four-way valve 14 by crossing a left port 12 and a right port 13, the overall height is greatly reduced, the oil collecting pipe head four-way valve 14 and the main control gate valve are integrated, and the communication state of a main channel 15 of the oil pipe head four-way valve is controlled through a bevel gear transmission mechanism 9, so that the pressure of a shaft can be controlled.
The oil pipe head four-way main channel 15 is a vertical channel of the oil pipe head four-way 14, the oil pipe head four-way main channel 15 below the valve plate 10 is a sleeve channel, and the sleeve channel is arranged below the valve plate 10 to reserve a sleeve emergency channel.
The valve plate 10 is designed at the position between the casing passage of the four-way pipe head 14 and the oil pipe hanger 8, the oil pipe hanger 8 is not installed in the fracturing operation, the reverse discharge and the self-injection production stages, and the oil pipe hanger 8 is installed through a pressure operation device in the later stage of conversion production.
Therefore, the device can meet the requirement of fracturing operation, can control the pressure of the casing pipe channel, and can complete the installation operation of the Christmas tree under the condition of controllable casing pressure by controlling the opening and closing of the built-in valve plate 10 of the oil pipe head four-way 14 during the subsequent inverted discharge and self-spraying production; the device's use has reduced the configuration quantity of gate valve on the perpendicular latus rectum in well head top, has reduced the whole height of production tree by a wide margin, the operation of the later stage production of being convenient for.
The manual fracturing and production wellhead device can be further optimized or/and improved according to actual needs:
as shown in fig. 2, in order to facilitate the disassembly and assembly of the casing gate valve 7 and the operation of the transmission mechanism, and further reduce the overall height of the device, the left port 12, the front port 11, the right port 13 and the rear port of the tubing head cross 14 are distributed in a staggered manner on the horizontal plane; an installation ring groove is arranged in the tubing head four-way joint 14 corresponding to the left and right ports 13, and a valve seat 16 is fixedly arranged in the installation ring groove; the inner diameter of the valve seat 16 is the same as that of the oil pipe head four-way 14 at the joint of the valve seat 16, the left end of the valve seat 16 is provided with a left through hole coaxially corresponding to the left port 12 of the oil pipe head four-way 14, the right end of the valve seat 16 is provided with a right through hole coaxially corresponding to the right port 13 of the oil pipe head four-way 14, the valve plate 10 transversely penetrates through the valve seat 16 through the left through hole and the right through hole, and the valve hole 19 which enables the upper port of the oil pipe head four-way 14 to be communicated with the lower port of the oil pipe.
The valve seat 16 may be of a two-lobe configuration to facilitate removal.
When the left port 12, the front port 11, the right port 13 and the rear port of the tubing head four-way joint 14 are distributed at intervals of 90 degrees along the horizontal plane, the operation is most convenient, and the overall height reaches the lowest value.
The valve seat 16 supports the valve plate 10, and when the main control gate valve is fully opened, the valve hole 19 of the main control gate valve is consistent with the drift diameter of the oil pipe head four-way 14 (at the main channel 15 of the oil pipe head four-way connected with the valve seat 16) so as not to influence the conventional operation.
As shown in fig. 2, a left valve cover 20 covering the left port 12 of the tubing head four-way 14 is fixedly and hermetically mounted on the outer side of the left port 12 of the tubing head four-way 14, a right valve cover 31 covering the right port 13 of the tubing head four-way 14 is fixedly and hermetically mounted on the outer side of the right port 13 of the tubing head four-way 14, a left stepped hole 22 which is narrow at the left and wide at the right and is axially and correspondingly communicated with the left through hole is transversely arranged on the left valve cover 20, a right stepped hole 23 which is wide at the left and narrow at the right and is axially and correspondingly communicated with the right through hole is transversely arranged on the right valve cover 31, and the valve plate 10 sequentially passes through the left stepped hole 22; the connecting device comprises a connecting sleeve 24, the right part of the connecting sleeve 24 is fixedly connected with the left end of the left valve cover 20 in a sealing manner, and the left part of the connecting sleeve 24 is fixedly connected with the right part of the bevel gear transmission mechanism 9.
The left valve cover 20 and the right valve cover 31 support the valve plate 10, and the wide-diameter sections of the left stepped hole 22 and the right stepped hole 23 form annular cavities, so that the valve plate 10 can move left and right, and pressure build-up is prevented.
As shown in fig. 2, the left part of the connecting sleeve 24 is fixedly connected with an installation box surrounding the bevel gear transmission mechanism 9, the installation box comprises a left groove body 25 with a rightward opening and a right groove body 26 with a leftward opening, the right groove body 26 is fixedly installed with the left part of the connecting sleeve 24, the right lower end of the left groove body 25 and the left lower end of the right groove body 26 are fixedly installed, an installation cavity 27 for accommodating the bevel gear transmission mechanism 9 is formed between the left groove body 25 and the right groove body 26, and the bevel gear transmission mechanism 9 is arranged in the installation cavity 27; the bevel gear transmission mechanism 9 comprises a bevel gear transmission component and a ball screw 30 pair; the bevel gear transmission assembly comprises a bevel gear 28 and a rotating rod 29, wherein the bevel gear 28 is fixed at the bottom of the rotating rod 29; the ball screw 30 pair comprises a screw 30 and a nut 31 which is arranged on the screw 30 in a matching way, and the right end of the screw 30 is fixedly arranged with the left end of the valve plate 10; a vertical hole through which the rotating rod 29 can pass is formed between the upper right end of the left groove body 25 and the upper left end of the right groove body 26, a bearing 32 is installed outside the rotating rod 29 on the inner side of the installation box above the bevel gear 28, the lead screw 30 is transversely arranged in the installation cavity 27, the nut 31 is installed in the installation box through a nut seat 45, a rotating cylinder 33 taking the lead screw 30 as a rotating shaft is installed on the outer side of the nut seat 45, a gear part 34 meshed with the bevel gear 28 is arranged at the left end of the rotating cylinder 33, and the bevel gear 28 is connected with the left end of the rotating cylinder 33 in a matched mode through the gear part 34.
When the main channel of the oil pipe head four-way joint 14 needs to be closed, the rotating rod 29 is rotated to drive the bevel gear 28 to rotate, the bevel gear 28 rotates by taking the axis of the rotating rod 29 as the center, the rotary drum 33 is driven to rotate by taking the lead screw 30 as the central axis, the rotary drum 33 drives the nut 31 to rotate around the lead screw 30 through the nut seat 45, the lead screw 30 is driven to move rightwards by the rotation of the nut 31, so that the valve plate 10 moves rightwards, namely the valve hole 19 in the valve plate 10 moves rightwards from the oil pipe head four-way main channel 15 to the right port 13, the valve hole 19 in the valve plate 10 is staggered with the oil pipe head four-way main;
otherwise, the oil pipe head four-way main channel 15 is communicated.
The transmission mechanism adopts a bevel gear and ball screw 30 pair transmission design, and greatly reduces the opening and closing torque of a manual large flat gate valve (main control gate valve plate 10).
As shown in fig. 2, the upper part of the rotating rod 29 extends out of the installation box from the vertical hole, and a hand wheel 35 for rotating the rotating rod 29 is arranged at the top of the rotating rod 29; an indication rod 36 is axially fixed at the left end of the lead screw 30, an indication ring 37 is arranged at the left end of the indication rod 36, a shielding cover 38 which is coaxial with the lead screw 30 and can shield the indication rod 36 is arranged on the left groove body 25, and an observation port at the position of the indication ring 37 is arranged on the shielding cover 38; a protective valve cover 39 is provided on the right valve cover 31 outside the right stepped hole 23.
The opening and closing state of the built-in master control gate valve can be known by observing the position of the indicating ring 37 through the observation port.
As shown in fig. 2, a left sealing groove with an opening facing to the left is arranged at the narrow diameter section of the left stepped hole 22, a sealing element 40 is fixedly installed in the left sealing groove, the sealing element 40 adopts spring energy storage sealing packing or a spring energy storage sealing ring 42, and a sealing gland 41 is fixedly installed in the left sealing groove at the outer end of the sealing element 40; a right sealing groove with a rightward opening is formed in the narrow diameter section of the right stepped hole 23, a sealing element 40 is fixedly installed in the right sealing groove, and a sealing gland 41 is fixedly installed in the right sealing groove at the outer end of the sealing element 40; at least one sealing ring 42 is arranged between the outer sides of the valve seats 16 above and below the valve plate 10 and the inner side of the tubing head cross 14.
The valve rod seal adopts a spring energy storage seal structure (spring energy storage seal packing or a spring energy storage seal ring), and the seal reliability of the built-in master control gate valve is greatly improved.
As shown in the attached drawings 1 and 2, radial locking holes are circumferentially distributed at the upper port of the tubing head four-way 14, a jackscrew locking mechanism 43 capable of preventing the tubing hanger 8 from moving upwards is fixedly installed in the radial locking holes, and a sealing assembly capable of being lifted out of a well head together with the tubing hanger 8 is fixedly installed at the outer side of the tubing hanger 8 below the jackscrew locking mechanism 43; and a radial grease injection hole 44 and a radial pressure relief hole 18 are circumferentially distributed at the lower port of the tubing head four-way joint 14.
The BT sealing ring 17 can realize the functions of grease injection and sealing of the sleeve.
The spring energy storage sealing filler, the spring energy storage sealing ring and the BT sealing ring 17 are all sealing parts 40 which are well known and used in the prior art.
The jack screw locking mechanism 43 may be a left jack screw sealing mechanism or a right jack screw sealing mechanism described in chinese patent document having a publication number of 204851201U (patent name: wellhead connection device, steam injection device, and production device), or may be other jack screw locking mechanisms 43 known in the art. The seal assembly mounted at the tubing hanger 8 uses other seals known and used in the art, such as metal seals.
The above technical features constitute the best embodiment of the present invention, which has strong adaptability and best implementation effect, and unnecessary technical features can be increased or decreased according to actual needs to meet the requirements of different situations.
The use process of the best embodiment of the invention is as follows:
before fracturing, a pressure control tubing head four-way joint 1 of the device is fixedly connected with a wellhead casing flange, and a fracturing tree with the same specification as the pressure control tubing head four-way joint 1 is installed at the upper port of the pressure control tubing head four-way joint for fracturing operation. After fracturing is finished, a hand wheel 35 on the bevel gear transmission mechanism 9 is rotated, a main control gate valve arranged in the tubing head four-way 14 is closed, wellbore pressure is controlled, a fracturing tree part (a well is blocked) is disassembled, a Christmas tree corresponding to the pressure level in the well is directly installed at the upper end of the pressure control tubing head four-way 1, and when reverse drainage and production operation are needed, the hand wheel 35 on the bevel gear transmission mechanism 9 is rotated, the main control gate valve arranged in the tubing head four-way 14 is opened, and reverse drainage and self-spraying production of fracturing fluid are carried out. And when the rotary pumping is needed in the later period, closing a main control gate valve arranged in the tubing head four-way joint 14, dismantling the Christmas tree, completely opening the main control gate valve arranged in the tubing head four-way joint 14 under the coordination of a pressure operation device, putting in an oil well pump and an oil pipe, connecting the tubing hanger 8 and sealing the tubing hanger in the tubing head four-way joint 14 when the last oil pipe is put down, installing the tubing head reducing joint 2 and the parts above, and turning to mechanical production.
Claims (10)
1. A manual fracturing and production wellhead device is characterized by comprising an oil pipe head reducing connector, a first gate valve, a small four-way joint and a pressure control oil pipe head four-way joint, wherein the pressure control oil pipe head four-way joint comprises an oil pipe head four-way joint and a main control gate valve;
the main control gate valve comprises a valve plate and a bevel gear transmission mechanism capable of controlling the valve plate to open and close an oil pipe head four-way main channel, a left port and a right port which are bilaterally symmetrical are arranged on the oil pipe head four-way channel between the front port and the rear port of the oil pipe head four-way channel and the lower part of the upper port of the oil pipe head four-way channel, the left port and the right port are communicated through the oil pipe head four-way main channel, the valve plate penetrates through the right port of the oil pipe head four-way channel from the oil pipe head four-way channel, and the fixed end of the bevel gear transmission mechanism.
2. A manual fracturing and production wellhead assembly according to claim 1 in which the left, front, right and rear tubing head cross-piece ports are staggered in the horizontal plane.
3. A manual fracturing and production wellhead device according to claim 1 or 2, characterized in that the tubing head cross corresponding to the left and right ports is provided with a mounting ring groove in which a valve seat is fixedly mounted; the inner diameter of the valve seat is the same as that of the oil pipe head cross joint at the joint of the valve seat, the left end of the valve seat is provided with a left through hole coaxially corresponding to the left port of the oil pipe head cross joint, the right end of the valve seat is provided with a right through hole coaxially corresponding to the right port of the oil pipe head cross joint, the valve plate transversely penetrates through the valve seat through the left through hole and the right through hole, and the valve plate is provided with a valve hole which enables the upper port of the oil pipe head cross joint to be communicated with the lower port of.
4. A manual fracturing and production wellhead device according to claim 3, characterized in that a left valve cover for covering the left port of the tubing head cross-joint is fixedly mounted on the outer side of the left port of the tubing head cross-joint in a sealing manner, a right valve cover for covering the right port of the tubing head cross-joint is fixedly mounted on the outer side of the right port of the tubing head cross-joint in a sealing manner, a left stepped hole which is narrow at the left and wide at the right is transversely arranged on the left valve cover and is axially and correspondingly communicated with the left through hole, a right stepped hole which is wide at the left and narrow at the right is transversely arranged on the right valve cover and is axially and correspondingly communicated with the right through hole, and the valve plate sequentially passes through the; the connecting device comprises a connecting sleeve, the right part of the connecting sleeve is fixedly connected with the left end of the left valve cover in a sealing mode, and the left part of the connecting sleeve is fixedly connected with the right part of the bevel gear transmission mechanism.
5. A manual fracturing and production wellhead device according to claim 4, characterized in that the left part of the connecting sleeve is fixedly connected with an installation box surrounding the bevel gear transmission mechanism, the installation box comprises a left groove body with a rightward opening and a right groove body with a leftward opening, the right groove body is fixedly installed with the left part of the connecting sleeve, the right lower end of the left groove body and the left lower end of the right groove body are fixedly installed, an installation cavity for accommodating the bevel gear transmission mechanism is formed between the left groove body and the right groove body, and the bevel gear transmission mechanism is arranged in the installation cavity; the bevel gear transmission mechanism comprises a bevel gear transmission assembly and a ball screw pair; the bevel gear transmission component comprises a bevel gear and a rotating rod, and the bevel gear is fixed at the bottom of the rotating rod; the ball screw pair comprises a screw and a nut which is arranged on the screw in a matched mode, and the right end of the screw is fixedly arranged with the left end of the valve plate; a vertical hole capable of enabling the rotating rod to penetrate is formed between the upper right end of the left groove body and the upper left end of the right groove body, a bearing is mounted outside the rotating rod on the inner side of the mounting box above the bevel gear, the lead screw is transversely arranged in the mounting cavity, the nut is mounted in the mounting box through a nut seat, a rotating cylinder taking the lead screw as a rotating shaft is mounted on the outer side of the nut seat, a gear portion meshed with the bevel gear is arranged at the left end of the rotating cylinder, and the bevel gear is connected with the left end of the rotating cylinder in a matched mode through the gear portion.
6. The manual fracturing and production wellhead assembly of claim 5, wherein the upper portion of the rotating rod extends out of the mounting box from the vertical hole, and a hand wheel for rotating the rotating rod is arranged at the top of the rotating rod; or/and an indicating rod is axially fixed at the left end of the lead screw, an indicating ring is arranged at the left end of the indicating rod, a shielding cover which is coaxial with the lead screw and can cover the indicating rod is arranged on the left groove body, and an observation port at the position of the indicating ring is arranged on the shielding cover; or/and a protective valve is arranged on the right valve cover outside the right stepped hole.
7. A manual fracturing and production wellhead device according to claim 4, 5 or 6, characterized in that the narrow diameter section of the left stepped bore is provided with a left seal groove with an opening facing to the left, a seal is fixedly installed in the left seal groove, the seal is spring energy storage seal packing or a spring energy storage seal ring, and a seal gland is fixedly installed in the left seal groove at the outer end of the seal; or/and a right sealing groove with a rightward opening is arranged at the narrow diameter section of the right stepped hole, a sealing element is fixedly arranged in the right sealing groove, and a sealing gland is fixedly arranged in the right sealing groove at the outer end of the sealing element; or/and at least one sealing ring is arranged between the outer sides of the valve seats above and below the valve plate and the inner side of the four-way pipe head.
8. The manual fracturing and production wellhead device according to claim 1, 2, 4, 5 or 6, wherein radial locking holes are circumferentially distributed at the upper port of the four-way joint of the tubing head, a jackscrew locking mechanism capable of preventing the tubing hanger from moving upwards is fixedly installed in the radial locking holes, and a sealing member capable of being lifted out of the wellhead together with the tubing hanger is fixedly installed on the outer side of the tubing hanger below the jackscrew locking mechanism; or/and radial grease injection holes and radial pressure relief holes are distributed at the lower port of the four-way joint of the tubing head along the circumference.
9. A manual fracturing and production wellhead device according to claim 3 or 7, characterized in that radial locking holes are circumferentially distributed at the upper port of the four-way of the tubing head, a jackscrew locking mechanism capable of preventing the tubing hanger from moving upwards is fixedly installed in the radial locking holes, and a sealing member capable of being lifted out of the wellhead together with the tubing hanger is fixedly installed on the outer side of the tubing hanger below the jackscrew locking mechanism; or/and radial grease injection holes and radial pressure relief holes are distributed at the lower port of the four-way joint of the tubing head along the circumference.
10. A method of using a manual fracturing and production wellhead as claimed in any of claims 1 to 9 characterised by the following method: before fracturing, fixedly connecting a pressure control tubing head four-way joint of the device with a wellhead casing flange, and installing a fracturing tree with the same specification as the pressure control tubing head four-way joint at an upper port of the pressure control tubing head four-way joint for fracturing operation; after fracturing is finished, a hand wheel on the bevel gear transmission mechanism is rotated, a main control gate valve arranged in the four-way pipe head is closed, a fracturing tree is disassembled, a well is sealed, a Christmas tree with the pressure level suitable for the pressure level in the well is directly installed at the upper port of the four-way pipe head, and when reverse drainage and production operation are needed, the hand wheel on the bevel gear transmission mechanism is rotated, the main control gate valve arranged in the four-way pipe head is opened, and reverse drainage and self-spraying production of fracturing fluid are carried out; and when the rotary pumping is needed in the later period, closing a main control gate valve arranged in the four-way of the tubing head, dismantling the Christmas tree, completely opening the main control gate valve arranged in the four-way of the tubing head under the coordination of a pressure operation device, and putting in an oil well pump and an oil pipe, when the last oil pipe is put down, connecting the tubing hanger and sealing the tubing hanger in the four-way of the tubing head, installing the reducing joint and the parts of the tubing head, and then, turning to mechanical production.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911159578.0A CN111022017A (en) | 2019-11-22 | 2019-11-22 | Manual fracturing and production wellhead device and using method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911159578.0A CN111022017A (en) | 2019-11-22 | 2019-11-22 | Manual fracturing and production wellhead device and using method thereof |
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| CN111022017A true CN111022017A (en) | 2020-04-17 |
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| CN201911159578.0A Pending CN111022017A (en) | 2019-11-22 | 2019-11-22 | Manual fracturing and production wellhead device and using method thereof |
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| CN115704297A (en) * | 2021-08-10 | 2023-02-17 | 中国石油天然气股份有限公司 | Integrated wellhead device for fracturing and oil extraction and operation method |
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Application publication date: 20200417 |