Sand-prevention hand-hydraulic dual-drive plug valve for fracturing

Abstract

The utility model relates to the technical field of petroleum shale gas drills, and discloses a sand-prevention hand-hydraulic dual-drive plug valve for fracturing, which comprises a plug valve, a hydraulic driver, a hand wheel, a gasket, a screw, a bolt and a nut, and is characterized in that the plug valve is connected with the hydraulic driver through the bolt, the nut is in threaded connection with the outer surface of the bolt, and the hand wheel is arranged on the hand wheel. The plug valve and the hydraulic driver are in transmission through a flat key, a copper ring is installed between the hand wheel and the hydraulic driver, and the gasket is installed at the top end of the hand wheel through a screw. According to the sand-prevention hand-hydraulic dual-drive plug valve for fracturing, the hydraulic drive mode and the manual drive mode can be achieved, remote drive and emergency drive are achieved, the plug valve of a floating type sand-prevention structure is adopted, good erosion resistance and scouring resistance are achieved, the plug valve is particularly suitable for high-flow occasions for fracturing, and sand can be effectively prevented from entering a valve cavity; the valve cover, the plug cock, the plug cock arc piece and the like are all uniquely designed, the requirement for on-site maintenance and replacement can be met conveniently, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of oil shale gas drilling, in particular to a sand prevention hand and hydraulic double drive plug valve for fracturing. BACKGROUND

[0002] After nearly ten years of development, China has gradually mastered the shale gas exploration and development technology system suitable for Chinese geological conditions, and China's fracturing modification technology is becoming mature. In the whole fracturing operation process, the large pressure plug valve is an indispensable part, which is widely used in ball throwing, pumping and high pressure manifold, and plays a crucial role. In addition, due to the danger of fracturing operation, the industry has begun to gradually adopt pneumatic, hydraulic or electric remote driving mode to replace the traditional hand wheel operation, which not only reduces the risk of personnel, but also improves the automation degree of the scene. Due to the high flow, high pressure and high sand content working conditions of fracturing operation, the traditional plug valve often appears sand into the valve cavity during actual use, which leads to the increase of operation torque, valve leakage and other problems. Once the remote terminal such as hydraulic station or transmission network has a problem in remote operation, the traditional remote plug valve will be invalid, and it cannot be used normally in a short time, which affects the oilfield production CONTENT OF THE UTILITY MODEL

[0003] In view of the deficiency of prior art, the utility model provides a sand prevention hand and hydraulic double drive plug valve for fracturing, adopts floating structure, through special sealing design, wave spring and valve cavity gap control, greatly reduces the risk of sand into the valve cavity. The plug valve adopts integral plug structure, the metal sealing part adopts nickel plating process, has good erosion resistance, wear resistance and sealing performance. In addition, the application provides a hand and hydraulic double control driving scheme, which can realize two control modes of hand and hydraulic drive, achieve seamless switching, and use hand drive mode in emergency when the hydraulic source fails. The application can be applied to pumping, ball throwing, high pressure manifold and other application scenes.

[0004] The utility model provides the following technical scheme: a sand prevention hand and hydraulic double drive plug valve for fracturing, including plug valve, hydraulic drive, hand wheel, gasket, screw, first bolt and first nut, its characterized in that: plug valve and hydraulic drive are connected through first bolt, the outer surface of first bolt is connected with first nut, plug valve and hydraulic drive are driven through flat key, first copper ring is installed between hand wheel and hydraulic drive, gasket is installed at the top of hand wheel through screw.

[0005] Preferably, the plug valve comprises a valve body, a valve stem, a plug arc piece, a first bearing, a valve stem gland, a plug, a grease injection valve, a side arc piece, and a valve cover.

[0006] The valve body and the valve cover are connected through threads; a sealing ring set is arranged between the valve body and the valve cover; high-pressure sealing ring sets are arranged on both sides of the valve rod gland, and the two high-pressure sealing ring sets are respectively abutted with adjacent valve rods or valve bodies; the first bearing is installed between the valve body and the valve rod; double-arc-seal and wave spring are arranged between the valve body and the plug arc piece; and the plug arc piece is installed with a pin.

[0007] Preferably, the plug is arranged on the upper surface of the plug arc piece, and the plug arc piece, the double-arc-seal, the plug, the wave spring and the side arc piece form a complete sealing group.

[0008] Preferably, the hydraulic driver comprises a transmission rod, an upper cylinder cover, a second nut, a second bolt, a cylinder body, a valve block, a piston, a bearing gland, a bearing support, a second bearing, a lower cover and a second copper ring.

[0009] Second sealing members are arranged between the cylinder body and the upper cylinder cover, between the cylinder body and the piston, between the cylinder body and the lower cover, between the transmission rod and the upper cylinder cover, between the lower cover and the second copper ring and between the transmission rod and the second copper ring.

[0010] Preferably, the transmission rod is integrally formed and extends out of the upper cylinder cover, the bottom of the transmission rod is provided with a key groove, a special spiral groove is processed in the middle transmission area, the spiral groove has a large spiral angle, and the top of the transmission rod is provided with a hexagonal head.

[0011] The piston is connected with the transmission rod through the spiral groove, and the piston is connected with the cylinder body through the spiral groove; the second copper ring is installed at the bottom of the transmission rod, the second copper ring extends out of the transmission rod and directly contacts the plug valve, the cylinder body is provided with the valve block on the outer surface, the valve block has upper and lower outlets, one end of the valve block is connected with the upper space of the piston, and the other end of the valve block is connected with the lower space of the piston, the valve block is provided with a throttle valve and a check valve, and the hydraulic driver, the upper cylinder cover, the cylinder body and the piston cooperatively form stroke limiting.

[0012] Preferably, the hand wheel is provided with a hexagonal groove in the middle for driving the transmission rod, and three through holes are formed in the outer surface of the hand wheel.

[0013] Compared with the prior art, the anti-sand hand hydraulic double-drive plug valve for fracturing has the following beneficial effects:

[0014] The sand prevention hand and hydraulic double drive plug valve for fracturing adopts floating sand prevention design, can realize reliable sealing under high pressure, and can prevent fracturing sand from entering the valve cavity, and the unique design of the inner cavity can reduce oil injection frequency and improve the service life of the plug valve.

[0015] The sand prevention hand and hydraulic double drive plug valve for fracturing adopts a swing type structure, fully meets the fracturing working condition, has long service life, and is convenient to maintain; the sand prevention hand and hydraulic double drive plug valve for fracturing can be remotely controlled through hydraulic driving, and can be manually controlled to realize emergency operation, and the operation is stable and the torque is small.

[0016] The sand prevention hand and hydraulic double drive plug valve for fracturing can realize two driving modes of hydraulic driving and manual driving, realizes remote and emergency driving, adopts a floating sand prevention structure plug valve, has good erosion resistance and washout resistance, is especially suitable for high-flow occasions for fracturing, and can effectively prevent sand from entering the valve cavity; the sand prevention hand and hydraulic double drive plug valve for fracturing adopts a floating sand prevention structure plug valve, and the valve cover, plug, plug arc piece and the like are uniquely designed, so that the needs of on-site maintenance and replacement can be met conveniently, and production efficiency is improved.

[0017] The sand prevention hand and hydraulic double drive plug valve for fracturing can meet the driving modes of manual driving and hydraulic driving, adopts a large helix angle screw pair for transmission, and does not have the phenomenon of self-locking; the copper ring is provided, the friction coefficient of each contact surface can be reduced; the valve block is provided, the opening and closing speed and the storage pressure can be adjusted, the opening and closing are stable, the energy consumption is small, the gasket and the bolt are used to prevent falling, and the position indication is provided, so that the plug valve quick closing state can be clearly observed. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structural schematic view of the utility model;

[0019] Figure 2 It is a schematic view of the plug valve of the utility model;

[0020] Figure 3 It is a schematic view of the hydraulic driver of the utility model

[0021] Figure 4 It is a schematic view of the hand wheel of the utility model.

[0022] In the drawing: 1, plug valve; 2, hydraulic driver; 3, hand wheel; 4, first copper ring; 5, gasket; 6, screw; 7, first bolt; 8, first nut;

[0023] 101, valve body; 102, valve stem; 103, pin; 104, plug arc piece; 105, wave spring; 106, first bearing; 107, valve stem gland; 108, plug; 109, grease injection valve; 1010, side arc piece; 1011, valve cover;

[0024] 201, transmission rod; 202, upper cylinder cover; 203, second nut; 204, second bolt; 205, cylinder body; 206, valve block; 207, piston; 208, bearing gland; 209, bearing support; 2010, second bearing; 2011, lower cover; 2012, second copper ring. DETAILED DESCRIPTION

[0025] Please refer to Figures 1-4 A sand prevention hand liquid dual drive plug valve for fracturing, comprising a plug valve 1, a hydraulic drive 2, a hand wheel 3, a gasket 5, a screw 6, a first bolt 7 and a first nut 8, the plug valve 1 is connected with the hydraulic drive 2 through the first bolt 7, the outer surface of the first bolt 7 is threadedly connected with the first nut 8, thereby reducing the intermediate conversion flange, the plug valve 1 and the hydraulic drive 2 are connected through a flat key transmission, the transmission is stable and reliable, the first copper ring 4 is installed between the hand wheel 3 and the hydraulic drive 2, thereby reducing the friction between the hydraulic drive 2 and the hand wheel 3, the gasket 5 is installed at the top end of the hand wheel 3 through the screw 6, the screw 6 is used to prevent the hand wheel from falling off, and the transmission is carried out through a hexagonal groove.

[0026] As Figure 2 shown, in example 2, the plug valve 1 comprises a valve body 101, a valve stem 102, a plug arc piece 104, a first bearing 106, a valve stem gland 107, a plug 108, a grease injection valve 109, a side arc piece 1010 and a valve cover 1011;

[0027] The valve body 101 and the valve cover 1011 are connected through threads; a sealing ring set is arranged between the valve body 101 and the valve cover 1011, which can meet the use under high pressure, high pressure sealing ring sets are arranged on both sides of the valve stem gland 107, and the two high pressure sealing ring sets respectively abut against the adjacent valve stem 102 or valve body 101, which can meet the use under high pressure, the first bearing 106 is installed between the valve body 101 and the valve stem 102, double arc piece seals and wave springs 105 are arranged between the valve body 101 and the plug arc piece 104, the plug arc piece 104 is installed with a pin 103, the plug arc piece 104 can be prevented from rotating in the plug valve through the pin 103, the arc piece special seal and the metal spring outer ring are integrally vulcanized, which can withstand high pressure.

[0028] The plug 108 is arranged on the upper surface of the plug arc piece 104, and the plug arc piece 104, the double-channel arc piece, the seal, the plug 108, the wave spring 105 and the side arc piece 1010 form a complete sealing group, in use, the valve gap is fully compressed, the valve cavity can be effectively prevented from being filled with sand, and the plug 108 is integrally plated with nickel, so that the sand-containing working condition can be effectively coped with.

[0029] As shown in Example 3, Figure 3 The hydraulic driver 2 comprises a transmission rod 201, an upper cylinder cover 202, a second nut 203, a second bolt 204, a cylinder body 205, a valve block 206, a piston 207, a bearing gland 208, a bearing support 209, a second bearing 2010, a lower cover 2011 and a second copper ring 2012.

[0030] Second sealing members are arranged between the cylinder body 205 and the upper cylinder cover 202, between the cylinder body 205 and the piston 207, between the cylinder body 205 and the lower cover 2011, between the transmission rod 201 and the upper cylinder cover 202, between the lower cover 2011 and the second copper ring 2012 and between the transmission rod 201 and the second copper ring 2012, and can seal a maximum pressure of 21 MPa.

[0031] The transmission rod 201 is integrally formed and extends out of the upper cylinder cover 202, the bottom of the transmission rod 201 is provided with a key groove, a special spiral groove is processed in the middle transmission area, the spiral groove has a large spiral angle and has no self-locking function, can drive the valve to open and close when manually and hydraulically driven, and the top of the transmission rod 201 is provided with a hexagonal head for connecting the hand wheel 3.

[0032] The piston 207 is connected to the transmission rod 201 through the spiral groove, and the piston 207 is connected to the cylinder body 205 through the spiral groove, so as to convert linear motion into rotary motion.

[0033] The second copper ring 2012 is installed at the bottom of the transmission rod 201 and extends out of the transmission rod 201 to directly contact the plug valve 1, so as to reduce the friction between the transmission cooperation, the valve block 206 is installed on the outer surface of the cylinder body 205, the valve block 206 has two upper and lower outlets, one end is connected to the upper space of the piston 207, the other end is connected to the lower space of the piston 207, pressure is respectively transmitted through the upper and lower ends, the piston 207 can be moved up and down, so as to drive the transmission rod 201 to rotate, the valve block 206 is provided with a throttle valve and a check valve, can adjust the input pressure to adjust the opening and closing speed, so that the opening and closing is stable, and can seal the valve cavity pressure, maintain the valve opening degree, avoid continuous pressure supply, the hydraulic driver 2, the upper cylinder cover 202, the cylinder body 205 and the piston 207 cooperatively form a stroke limiting, when hydraulically and manually driven to the position, mechanical limiting is generated to prevent over-opening and closing.

[0034] In the embodiment four, the middle of the hand wheel 3 is a hexagonal groove for driving the transmission rod 201; the outer surface of the hand wheel 3 is provided with three through holes which can cooperate with the extension rod to drive the large torque valve; the hand wheel 3 can be replaced by a gear reduction mechanism according to the need to drive the large torque valve; the top has a forged channel indication which can observe the opening and closing position of the valve.

[0035] In summary, the sand-proof hand and hydraulic dual drive plug valve for fracturing can realize two driving modes of hydraulic and manual, realize remote and emergency driving; has good erosion resistance and scouring resistance, especially suitable for high flow occasions for fracturing, can effectively prevent sand into the valve cavity

[0036] The sand-proof hand and hydraulic dual drive plug valve for fracturing adopts a floating sand-proof structure plug valve, the valve cover, plug, plug arc piece and the like are uniquely designed, which can meet the needs of on-site maintenance and replacement, and improve the production efficiency.

[0037] The sand-proof hand and hydraulic dual drive plug valve for fracturing can meet the manual and hydraulic driving modes, adopts a large helix angle screw pair for transmission, and does not appear self-locking phenomenon; is equipped with a copper ring which can reduce the friction coefficient of each contact surface; is configured with a valve block which can adjust the opening and closing speed and the storage pressure, and has stable opening and closing and small energy consumption.

[0038] The sand-proof hand and hydraulic dual drive plug valve for fracturing adopts gaskets and bolts to prevent falling, and is configured with a position indication which can clearly observe the quick closing state of the plug valve.

Claims

1. A sand control fluid and hand dual drive plug valve for fracturing, comprising a plug valve (1), a hydraulic drive (2), a hand wheel (3), a gasket (5), a screw (6), a first bolt (7) and a first nut (8), characterized in that: The cock valve (1) is connected with the hydraulic driver (2) through the first bolt (7), the outer surface of the first bolt (7) is threadedly connected with the first nut (8), the cock valve (1) is driven by the flat key, the first copper ring (4) is installed between the hand wheel (3) and the hydraulic driver (2), and the gasket (5) is installed on the top end of the hand wheel (3) through the screw (6).

2. The sand control service fluid dual drive plug valve according to claim 1, characterized in that: The cock valve (1) comprises a valve body (101), a valve rod (102), a cock arc piece (104), a first bearing (106), a valve rod gland (107), a cock (108), a grease injection valve (109), a side arc piece (1010) and a valve cover (1011). The valve body (101) and the valve cover (1011) are connected through threads, a sealing ring group is arranged between the valve body (101) and the valve cover (1011), high-pressure sealing ring groups are arranged on both sides of the valve rod gland (107), the two high-pressure sealing ring groups are respectively abutted against the adjacent valve rod (102) or valve body (101), the first bearing (106) is installed between the valve body (101) and the valve rod (102), a double-arc sealing and wave spring (105) is arranged between the valve body (101) and the cock arc piece (104), and the cock arc piece (104) is provided with a pin (103).

3. The sand control service fluid dual drive plug valve according to claim 2, wherein: The cock (108) is arranged on the upper surface of the cock arc piece (104), and the cock arc piece (104), the double-arc sealing, the cock (108), the wave spring (105) and the side arc piece (1010) form a complete sealing group.

4. The sand control service fluid dual drive plug valve according to claim 2, wherein: The hydraulic driver (2) comprises a transmission rod (201), an upper cylinder cover (202), a second nut (203), a second bolt (204), a cylinder body (205), a valve block (206), a piston (207), a bearing gland (208), a bearing support (209), a second bearing (2010), a lower cover (2011) and a second copper ring (2012). Second sealing members are arranged between the cylinder body (205) and the upper cylinder cover (202), between the cylinder body (205) and the piston (207), between the cylinder body (205) and the lower cover (2011), between the transmission rod (201) and the upper cylinder cover (202), between the lower cover (2011) and the second copper ring (2012) and between the transmission rod (201) and the second copper ring (2012).

5. The sand control service fluid dual drive plug valve according to claim 4, characterized in that: The transmission rod (201) is integrally formed and extends out of the upper cylinder cover (202), the bottom of the transmission rod (201) is provided with a key groove, a special spiral groove is processed in the middle transmission area, the spiral groove has a large spiral angle, and a hexagonal head is arranged at the top of the transmission rod (201). Piston (207) and transmission rod (201) are connected by screw groove, the piston (207) and cylinder (205) are connected by screw groove; The second copper ring (2012) is installed at the bottom of transmission rod (201), the second copper ring (2012) extends out of transmission rod (201) and directly contacts with plug valve (1), the outer appearance of cylinder (205) is provided with valve block (206), the valve block (206) has two upper and lower outlets, one end is connected with the upper space of piston (207), the other end is connected with the lower space of piston (207), the valve block (206) is equipped with throttle valve and check valve, the hydraulic drive (2), upper cylinder cover (202), cylinder (205) and piston (207) cooperate to form stroke limit.

6. The sand control service fluid dual drive plug valve according to claim 1, wherein: The hand wheel (3) is hexagonal in the middle, which is used to drive the transmission rod (201); Three through holes are formed in the outer appearance of the hand wheel (3).

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