Rapidly-connected oil field oil pipe multi-diameter blanking plug

Abstract

The utility model relates to the field of oil field oil pipe equipment, and discloses a quick-connection oil field oil pipe multi-diameter blanking plug which comprises a working barrel, the left end of the working barrel is fixedly connected with a sleeve, the inner wall of the sleeve is detachably connected with a positioning ring, the right end of the working barrel is fixedly connected with a threaded barrel, and the threaded barrel is fixedly connected with a threaded rod. A supporting assembly is arranged on the outer side of the threaded cylinder and comprises a supporting sleeve, a plurality of sets of evenly-distributed mounting grooves are formed in the lower surface of the supporting sleeve, and telescopic rods are fixedly connected to the bottoms of the inner walls of the mounting grooves. According to the utility model, through the mutual cooperation of the supporting sleeve, the supporting pad, the threaded cylinder and other parts in the supporting assembly by utilizing the connection relationship, the blanking plug is supported in an auxiliary manner under the action of the supporting sleeve, so that the blanking plug is uniformly stressed in the use process, the phenomenon that the blanking plug shakes in the use process is avoided, and the service life of the blanking plug is prolonged. And the connecting speed and the using effect of the blanking plug to the oil pipe are enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to oilfield tubing equipment field especially relates to a quick -witted oilfield tubing multilayer plug. BACKGROUND

[0002] In the process of oilfield workover operation construction, the oil pipe needs to be frequently tripped. If the bottom hole pressure is too high, the well fluid will flow into the oil pipe and flow out from the wellhead, thereby causing well flow, and even blowout in serious cases, causing serious production accidents. Therefore, in order to ensure safety, the well is usually pressed by using well killing fluid with suitable density before tripping the oil pipe.

[0003] Through retrieval, the Chinese patent publication No. CN221799740U discloses a full-bore coiled tubing plug, relating to the technical field of oil and gas exploitation equipment. The full-bore coiled tubing plug includes a connecting cylinder and a guide head. The first end of the connecting cylinder is provided with a plug-in area for plugging into the coiled tubing. The plug-in area can be compressed along the axial direction of the connecting cylinder. A sealing ring is sleeved outside the plug-in area to make the sealing ring expand around the axial direction of the connecting cylinder and tightly adhere to the inner wall of the coiled tubing. The guide head is plugged into the second end of the connecting cylinder and connected to the connecting cylinder through a shear pin. The connecting cylinder and the guide head are both dissolvable alloy bodies that fully dissolve at a temperature higher than a specified temperature.

[0004] The above device has the following defects: when the device needs to be applied to oil pipes of various specifications in oilfields, the height and internal diameter of the oil pipes are different, which causes the device to shake when the plug connects, making it difficult to effectively support the installation point and reducing the connection speed and use effect of the plug. Therefore, a quick-connection oilfield tubing multi-pass plug is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0005] To make up for the above shortcomings, the utility model provides a quick-connection oilfield tubing multi-pass plug, aiming to improve the problem of inconvenient communication and support of the plug with various oil pipes in the prior art.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme: a quick-connection oilfield tubing multi-pass plug, including a working cylinder, the left end of the working cylinder is fixedly connected with a sleeve, the inner wall of the sleeve is detachably connected with a positioning ring, the right end of the working cylinder is fixedly connected with a threaded cylinder, the outer side of the threaded cylinder is provided with a support assembly, the support assembly includes a support sleeve, a plurality of groups of mounting grooves are evenly arranged on the lower surface of the support sleeve, the inner wall bottom of the mounting groove is fixedly connected with an extension rod, the extension rod is elastically connected with a support pad through a spring, and the inner wall of the working cylinder is provided with an auxiliary assembly.

[0007] As a further description of the above technical solution: the auxiliary assembly includes an auxiliary cylinder, a top column is fixedly installed at the left end of the auxiliary cylinder, a mounting seat is fixedly connected at the right end of the auxiliary cylinder, a spray head is fixedly installed at the right end of the mounting seat, an auxiliary groove is formed in the outer wall of the spray head, the end of the top column is in a conical structure, and a tungsten carbide wear-resistant layer is plated on the surface, the spray holes of the spray head are arranged in a spiral array, the diameter of the spray holes is 0.5-2mm, the spray direction of the spray head forms an angle of 15-30° with the oil pipe axis, a piezoelectric vibration sensor is embedded in the auxiliary groove, and the piezoelectric vibration sensor is connected to the wireless transmission module on the outer wall of the working cylinder through wires, for real-time monitoring of the fluid pulsation frequency.

[0008] As a further description of the above technical solution: a threaded wall is formed in the outer wall of the inner ring of the support sleeve, the threaded wall adopts a double-end trapezoidal thread structure, the thread depth is 1.2-1.8mm, and a fluorine rubber sealing ring is arranged at the joint of the support sleeve and the threaded cylinder, and the cross section of the sealing ring is in an X-shaped structure.

[0009] As a further description of the above technical solution: the threaded wall is threadedly connected to the outer wall of the threaded cylinder.

[0010] As a further description of the above technical solution: the top end of the spring is fixedly connected to the telescopic end of the telescopic rod, the bottom end of the spring is fixedly installed on the upper surface of the support pad, the spring adopts a variable-pitch spiral spring, the free length is 50-80mm, and the stiffness coefficient is 20-50N / mm, and the telescopic rod is a three-stage nested stainless steel sleeve with a maximum stroke of 30mm.

[0011] As a further description of the above technical solution: a plurality of evenly distributed anti-skid grooves are formed in the lower surface of the support pad, the cross section of the anti-skid groove is in a V-shaped structure, the depth is 0.3-0.8mm, the distance between adjacent anti-skid grooves is 1-3mm, a magnetic adsorption layer is embedded in the bottom of the support pad, and the material of the magnetic adsorption layer is a neodymium-iron-boron permanent magnet.

[0012] As a further description of the above technical solution: the outer wall of the auxiliary cylinder is detachably connected to the inner wall of the working cylinder.

[0013] As a further description of the above technical solution: the support sleeve is detachably connected to the outer wall of the threaded cylinder through the threaded wall.

[0014] As a further description of the above technical solution: the inner wall of the working cylinder is provided with a stepped variable-diameter structure, the inner diameter of the working cylinder decreases from left to right, and the variable-diameter difference is 5-15mm, and the outer surface of the working cylinder is coated with a polytetrafluoroethylene corrosion-resistant layer.

[0015] As a further description of the above technical solutions: the inner periphery of the positioning ring is provided with an adjustable locking mechanism, the adjustable locking mechanism includes three groups of wedge-shaped clamping blocks distributed in the radial direction, the clamping blocks control the extension amount through the inner hexagonal adjusting screw, the adjusting range of the hexagonal adjusting screw is 0-5mm, the axial middle part of the working cylinder is provided with an emergency pressure relief valve group, the emergency pressure relief valve group includes a bursting disc and a bypass flow channel, the burst pressure of the bursting disc is set to 1.5-2 times of the working pressure.

[0016] The utility model has the advantages of the following beneficial effects:

[0017] 1、 the utility model discloses, through the mutual cooperation of the connecting relationship between supporting sleeve, supporting pad, threaded cylinder and other parts in supporting assembly, the auxiliary supporting effect of the plugger under the action of supporting sleeve is realized, the plugger is evenly stressed in the use process, avoid the phenomenon of the plugger to shake when using, enhance the connection rate and use effect of the plugger to oil pipe.

[0018] 2、 the utility model discloses, through the mutual cooperation of the connecting relationship between auxiliary cylinder, jacks, spray head and other parts in auxiliary assembly, the installation and dismounting of internal auxiliary cylinder are realized, the phenomenon of needing to replace the whole equipment when the part is damaged is avoided, the maintenance cost of equipment is reduced, when the staff needs to replace other parts, it is more convenient, the convenience of equipment maintenance is improved, and the functionality of the device is enriched. ACCURACY OF DRAWINGS

[0019] Figure 1 A main body front view area schematic diagram of a quick connection oilfield oil pipe multi-pass plugger is provided for the utility model;

[0020] Figure 2 A working cylinder local area part explosion schematic diagram of a quick connection oilfield oil pipe multi-pass plugger is provided for the utility model;

[0021] Figure 3 A supporting sleeve local area schematic diagram of a quick connection oilfield oil pipe multi-pass plugger is provided for the utility model;

[0022] Figure 4 An installation groove local section view area schematic diagram of a quick connection oilfield oil pipe multi-pass plugger is provided for the utility model.

[0023] LEGEND:

[0024] 1, working cylinder; 2, sleeve; 21, positioning ring; 3, threaded cylinder; 4, auxiliary assembly; 41, auxiliary cylinder; 42, top column; 43, mounting seat; 44, spray head; 45, auxiliary groove; 5, support assembly; 51, support sleeve; 52, threaded wall; 53, mounting groove; 54, telescopic rod; 55, spring; 56, support pad. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0026] With reference to Figures 1-3 An embodiment provided by the utility model: a quick connection oilfield oil pipe multi-pass plug, comprising a working cylinder 1, the working cylinder 1 supports the equipment, the inner wall of the working cylinder 1 is provided with a stepped variable diameter structure, the inner diameter of the working cylinder 1 decreases gradually from left to right, the variable diameter difference is 5-15mm, the outer surface of the working cylinder 1 is covered with a polytetrafluoroethylene anticorrosive layer, multi-stage throttling is realized through the stepped variable diameter structure, and the spiral injection hole is matched to form a rotational flow effect, so that the plugging stability is enhanced. The magnetic adsorption layer can adsorb iron filings and impurities, reduce the pipe wall wear, and assist positioning at the same time. The left end of the working cylinder 1 is fixedly connected with a sleeve 2, the sleeve 2 positions the equipment, the inner wall of the sleeve 2 is detachably connected with a positioning ring 21, the positioning ring 21 strengthens the positioning strength between the sleeve 2 and the auxiliary cylinder 41, the inner periphery of the positioning ring 21 is provided with an adjustable locking mechanism, the adjustable locking mechanism comprises three groups of wedge-shaped clamping blocks distributed in the radial direction, the clamping blocks are controlled by the inner hexagonal adjusting screw to extend, the adjusting range of the hexagonal adjusting screw is 0-5mm, the radial size fine adjustment is realized by the wedge-shaped clamping blocks of the adjustable locking mechanism, the pipe diameter tolerance of ± 2.5mm is adapted, the axial middle part of the working cylinder 1 is provided with an emergency pressure relief valve group, the emergency pressure relief valve group comprises a bursting disc and a bypass flow channel, the bursting pressure of the bursting disc is set to 1.5-2 times of the working pressure, based on the overpressure protection provided by the emergency pressure relief valve group, the bursting disc and the bypass flow channel double-protect against system overpressure, the piezoelectric vibration sensor realizes real-time monitoring of working conditions, data is transmitted to the control center through the wireless module, and the safety of work is further improved. The right end of the working cylinder 1 is fixedly connected with a threaded cylinder 3, the threaded cylinder 3 provides an adjusting track for the support assembly 5, and the applicable range of the support assembly 5 is increased. The outer side of the threaded cylinder 3 is provided with the support assembly 5, and the inner wall of the working cylinder 1 is provided with the auxiliary assembly 4.

[0027] With reference to Figures 2-4When the device is connected into different oil pipes, the supporting assembly 5 is started, the supporting assembly 5 comprises a supporting sleeve 51, a threaded wall 52 is arranged on the outer wall of the inner ring of the supporting sleeve 51, after the working barrel 1 is inserted into the oil pipe, the staff rotates the supporting sleeve 51, the threaded wall 52 is threadedly connected to the outer wall of the threaded barrel 3, the supporting sleeve 51 is detachably connected to the outer wall of the threaded barrel 3 through the threaded wall 52, the supporting sleeve 51 adjusts the distance in the vertical direction on the threaded barrel 3 through the threaded wall 52, the application range of the device is expanded, the threaded wall 52 adopts a double-end trapezoidal thread structure, the thread depth is 1.2-1.8 mm, a fluorine rubber sealing ring is arranged at the joint of the supporting sleeve 51 and the threaded barrel 3, the cross section of the sealing ring is an X-shaped structure, the multi-lip sealing formed by the X-shaped fluorine rubber sealing ring at the threaded connection position can resist an oil pressure of 35 MPa, the tungsten carbide coating makes the top post 42 have a wear life increased by more than three times, and the high-frequency plugging operation is adapted, so that the sealing effect is improved, the durability of the oil field oil pipe multi-pass plug during long-term use is improved, and the lower surface of the supporting sleeve 51 is in contact with the oil pipe opening of the connecting end, the oil pipe opening is supported by the supporting sleeve 51, the plug is assisted and supported under the action of the supporting sleeve 51 when the device is connected to the oil pipe opening of different specifications, the plug is uniformly stressed during use, the shaking of the plug during use is avoided, the connection speed and use effect of the plug on the oil pipe are improved, a plurality of groups of mounting grooves 53 are arranged on the lower surface of the supporting sleeve 51 and are uniformly distributed, an expansion rod 54 is fixedly connected to the inner wall bottom of the mounting groove 53, the expansion rod 54 is elastically connected with a supporting pad 56 through a spring 55, when the connection needs to be released, the supporting pad 56 is lifted up to the supporting sleeve 51 under the action of the spring 55, the top end of the spring 55 is fixedly connected to the expansion end of the expansion rod 54, the bottom end of the spring 55 is fixedly installed on the upper surface of the supporting pad 56, the spring 55 adopts a variable-pitch spiral spring, the free length is 50-80 mm, and the stiffness coefficient is 20-50 N / mm, the expansion rod 54 is a three-level nested stainless steel sleeve pipe, the maximum stroke is 30 mm, the variable-pitch spring is combined with the three-level expansion rod to provide nonlinear supporting force, different compression stroke requirements are matched, the oil field oil pipe multi-pass plug of the quick connector has stronger flexibility in adjustment and applicability, a plurality of groups of anti-skid grooves are arranged on the lower surface of the supporting pad 56 and are uniformly distributed, the cross section of the anti-skid groove is V-shaped, the depth is 0.3-0.8 mm, and the distance between adjacent anti-skid grooves is 1-3 mm; a magnetic adsorption layer is embedded in the bottom of the supporting pad 56, the material of the magnetic adsorption layer is a neodymium iron boron permanent magnet, the contact surface of the supporting sleeve 51 and the oil pipe opening is prevented from being stuck after long-time contact, and the protection effect of the device during use is improved.

[0028] Referring to Figures 1-3When the device needs to be maintained, the auxiliary assembly 4 is started, the auxiliary assembly 4 comprises an auxiliary cylinder 41, the outer wall of the auxiliary cylinder 41 is detachably connected in the inner wall of the working cylinder 1, the left end of the auxiliary cylinder 41 is fixedly installed with a jacking column 42, the staff realizes the installation and dismounting of the internal auxiliary cylinder 41 by the releasing of the sleeve 2 and the pulling force of the jacking column 42, the phenomenon that the whole device needs to be replaced when the part is damaged is avoided, the end of the jacking column 42 is of a conical structure and is plated with a tungsten carbide wear-resistant layer on the surface, the spray holes of the spray head 44 are distributed in a spiral array, the aperture of the spray holes is 0.5-2mm, the spray direction of the spray head 44 forms an angle of 15-30° with the oil pipe axis, the auxiliary groove 45 is embedded with a piezoelectric vibration sensor, the piezoelectric vibration sensor is connected to the wireless transmission module on the outer wall of the working cylinder 1 through wires, and is used for monitoring the fluid pulsation frequency in real time, the right end of the auxiliary cylinder 41 is fixedly connected with a mounting seat 43, the right end of the mounting seat 43 is fixedly installed with the spray head 44, the maintenance cost of the device is reduced, the staff is more convenient when other parts need to be replaced, the outer wall of the spray head 44 is provided with the auxiliary groove 45, the convenience of device maintenance is improved, and the functionality of the device is enriched.

[0029] When the device is connected into different oil pipes, the support assembly 5 is started, after the working cylinder 1 is inserted into the oil pipe, the staff rotates the support sleeve 51 to adjust the distance of the support sleeve 51 on the threaded cylinder 3 in the vertical direction through the action of the threaded wall 52, the application range of the device is expanded, the lower surface of the support sleeve 51 is in contact with the oil pipe port of the connecting end, the oil pipe port is supported by the support sleeve 51, when the device is connected to the oil pipe port under different specifications, the plug is assisted and supported under the action of the support sleeve 51, the plug is uniformly stressed in the use process, the phenomenon that the plug shakes in use is avoided, the connection rate and use effect of the plug on the oil pipe are enhanced, when the connection needs to be released, the support pad 56 is lifted to the support sleeve 51 under the action of the spring 55, the contact surface of the support sleeve 51 and the oil pipe port is prevented from being stuck after long-time contact, the protection effect of the device in the use process is enhanced, when the device needs to be maintained, the auxiliary assembly 4 is started, the staff releases the sleeve 2, the internal auxiliary cylinder 41 is installed and dismounted through the pulling force of the jacking column 42, the phenomenon that the whole device needs to be replaced when the part is damaged is avoided, the maintenance cost of the device is reduced, the staff is more convenient when the spray head 44 or other parts need to be replaced, the convenience of device maintenance is improved, and the functionality of the device is enriched.

[0030] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, the spirit and principles of the present application, made any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A quick connect oilfield tubing multiple gauge plug comprising a working barrel (1) characterised in that: The left end of the working barrel (1) is fixedly connected with a sleeve (2), the inner wall of the sleeve (2) is detachably connected with a positioning ring (21), the right end of the working barrel (1) is fixedly connected with a threaded barrel (3), the outer side of the threaded barrel (3) is provided with a supporting assembly (5), the supporting assembly (5) comprises a supporting sleeve (51), a plurality of groups of installation grooves (53) are evenly arranged on the lower surface of the supporting sleeve (51), the inner wall bottom of the installation groove (53) is fixedly connected with an expansion rod (54), the expansion rod (54) is elastically connected with a supporting pad (56) through a spring (55), and the inner wall of the working barrel (1) is provided with an auxiliary assembly (4).

2. A quickly connected oilfield tubing multiple-gauge plug according to claim 1, characterized in that: The auxiliary assembly (4) comprises an auxiliary barrel (41), the left end of the auxiliary barrel (41) is fixedly installed with a top column (42), the right end of the auxiliary barrel (41) is fixedly connected with a mounting seat (43), the right end of the mounting seat (43) is fixedly installed with a spray head (44), the outer wall of the spray head (44) is provided with an auxiliary groove (45), the end of the top column (42) is of a conical structure, and the surface is plated with a tungsten carbide wear-resistant layer, the spray holes of the spray head (44) are arranged in a spiral array, the aperture of the spray holes is 0.5-2mm, the spray direction of the spray head (44) and the oil pipe axis form an angle of 15-30°, the auxiliary groove (45) is embedded with a piezoelectric vibration sensor, the piezoelectric vibration sensor is connected to the wireless transmission module on the outer wall of the working barrel (1) through a wire, and is used for monitoring the fluid pulsation frequency in real time.

3. A quickly connected oilfield tubing multiple-graduation plug according to claim 1, characterized in that: The outer wall of the inner ring of the supporting sleeve (51) is provided with a threaded wall (52), the threaded wall (52) adopts a double-end trapezoidal thread structure, the thread depth is 1.2-1.8mm, and the junction of the supporting sleeve (51) and the threaded barrel (3) is provided with a fluorine rubber sealing ring, and the sealing ring cross section is an X-shaped structure.

4. A quickly connected oilfield tubing multiple-graduation blank according to claim 3, characterized in that: The threaded wall (52) is threadedly connected on the outer wall of the threaded barrel (3).

5. A quickly connected oilfield tubing multiple-graduation plug according to claim 1, characterized in that: The top end of the spring (55) is fixedly connected on the telescopic end of the expansion rod (54), the bottom end of the spring (55) is fixedly installed on the upper surface of the supporting pad (56), the spring (55) adopts a variable-pitch spiral spring, the free length is 50-80mm, the stiffness coefficient is 20-50N / mm, and the expansion rod (54) is a three-level nested stainless steel sleeve pipe, and the maximum stroke is 30mm.

6. A quickly connected oilfield tubing multiple-graduation plug according to claim 1, characterized in that: The lower surface of the supporting pad (56) is provided with a plurality of groups of evenly distributed anti-skid grooves, the cross section of the anti-skid groove is V-shaped, the depth is 0.3-0.8mm, the distance between adjacent anti-skid grooves is 1-3mm, the bottom of the supporting pad (56) is embedded with a magnetic adsorption layer, and the material of the magnetic adsorption layer is a neodymium iron boron permanent magnet.

7. A quickly connected oilfield tubing multiple-graduation blank according to claim 2, characterized in that: The outer wall of the auxiliary barrel (41) is detachably connected to the inner wall of the working barrel (1).

8. A quickly connected oilfield tubing multiple-graduation blank according to claim 1, characterized in that: The supporting sleeve (51) is detachably connected to the outer wall of the threaded barrel (3) through the threaded wall (52).

9. A quickly connected oilfield tubing multiple-graduation blank according to claim 1, characterized in that: The inner wall of the working barrel (1) is provided with a stepped variable-diameter structure, the inner diameter of the working barrel (1) decreases from left to right, and the variable-diameter difference is 5-15mm, and the outer surface of the working barrel (1) is coated with a polytetrafluoroethylene corrosion-resistant layer.

10. A quickly connected oilfield tubing multiple-graduation plug according to claim 1, characterized in that: The inner periphery of the positioning ring (21) is provided with an adjustable locking mechanism, which comprises three groups of wedge-shaped clamping blocks distributed in the radial direction, the clamping blocks control the amount of extension through the inner hexagonal adjusting screw, the adjusting range of the hexagonal adjusting screw is 0-5mm, the axial middle part of the working cylinder (1) is provided with an emergency pressure relief valve group, the emergency pressure relief valve group comprises a bursting disc and a bypass flow channel, the burst pressure of the bursting disc is set to 1.5-2 times of the working pressure.

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