Under-pressure overhaul operation device with safety auxiliary mechanism

Abstract

The utility model belongs to the technical field of workover treatment, and discloses an under-pressure overhaul operation device provided with a safety auxiliary mechanism, which comprises a chassis for bearing a device body, the device body comprises a movable cross beam, an upper cross beam, a lower cross beam, a lifting oil cylinder and a fully-sealed flashboard blowout preventer positioned at the lowest part, and the chassis is of a flat plate structure; a connecting base is welded to the middle of one end of the chassis, a connecting base supporting lug is welded to a top flat plate of the connecting base, the upper end of the connecting base supporting lug is hinged to a connecting flange supporting lug through a first pin shaft, the connecting flange supporting lug is welded to the lower end face of a connecting flange, and the connecting flange is detachably connected with a lower connector flange of the full-sealing ram blowout preventer. The chassis is further provided with a pillow block, and the device body is supported on the pillow block when horizontally placed. The balance device can play a role in balancing and stabilizing when the under-pressure overhaul operation device is hoisted, the device is prevented from inclining or shaking, and the device can be effectively fixed during transportation, so that the hoisting and transportation processes are safer and more reliable.

Description

Technical Field

[0001] This utility model relates to a well workover operation device, and more particularly to a pressurized overhaul operation device equipped with a safety auxiliary mechanism, belonging to the technical field of well workover equipment. Background Technology

[0002] Live well workover refers to a technique that involves maintaining and operating an oil well without shutting it in, i.e., while the well still maintains a certain pressure and production capacity. Live well workover equipment is equipped with blowout preventers to achieve circulation and pressure control of the working medium and avoid environmental pollution.

[0003] Our company previously designed a pressurized overhaul operation device, as shown in the attached instruction manual. Figure 1 As shown, the device includes components such as a blowout preventer extension tube, a hydraulic sucker rod annular blowout preventer, a hydraulic double-gate sucker rod blowout preventer, and a lifting cylinder. This device enables the raising and lowering of tubing and sucker rod under pressure, effectively reducing well downtime losses, shortening production recovery time, and minimizing the impact on oil and gas production.

[0004] However, in practical use, the following problems were found with this live overhaul equipment: The equipment is heavy and elongated, requiring horizontal placement during transport but vertical installation at the wellhead. Traditional lifting methods for installing the equipment at the wellhead or removing it from the wellhead and placing it on the transport vehicle involve single-point force application, which not only demands high skill from the lifting operators but also results in prolonged lifting time. Furthermore, the bottom of the equipment is prone to shifting or swaying during lifting, which can damage the hydraulic double-gate sucker rod blowout preventer and may cause the equipment to swing uncontrollably, colliding with the transport vehicle or on-site workers, posing a significant safety risk. Simultaneously, the equipment is also prone to shifting due to inertia during transport, potentially damaging both the equipment itself and the transport vehicle. Utility Model Content

[0005] To address the aforementioned shortcomings of existing technologies, this invention aims to solve the problem of live overhaul operation devices being large and heavy, making them difficult to control during transportation and lifting, and prone to safety accidents due to swaying. This invention provides a live overhaul operation device equipped with a safety auxiliary mechanism. It includes a chassis and connecting seat that cooperate with the live overhaul operation device. A flange is provided at the bottom of the live overhaul operation device, changing the traditional single-point force application during lifting to a two-end force application, making lifting and retrieval operations more controllable and stable, avoiding safety accidents, and improving work efficiency.

[0006] To achieve the above objectives, this utility model provides a pressurized overhaul operation device equipped with a safety auxiliary mechanism, including a chassis supporting the main body of the device. The main body of the device includes a movable crossbeam, an upper crossbeam, a lower crossbeam, a lifting cylinder, and a fully sealed gate blowout preventer located at the bottom. The chassis is a flat plate structure, with a connecting seat welded to the middle of one end of the chassis. A connecting seat lug is welded to the top plate of the connecting seat. The upper end of the connecting seat lug is hinged to the connecting flange lug via a first pin. The connecting flange lug is welded to the lower end face of the connecting flange. The connecting flange is detachably connected to the lower interface flange of the fully sealed gate blowout preventer.

[0007] Furthermore, a limiting structure is provided between the connecting seat lug and the connecting flange lug to keep the upper end face of the connecting flange horizontal.

[0008] Furthermore, the chassis is provided with two parallel support blocks. When the device body is placed horizontally, one side of the upper and lower crossbeams is supported on the support blocks.

[0009] Furthermore, the chassis is provided with multiple hanging ears on its side, and the hanging ears are provided with grooves for ropes to be inserted.

[0010] Furthermore, the limiting structure includes an upper ear plate, a lower ear plate, and a second pin. The upper ear plate is welded to the side of the connecting flange support and extends obliquely downward. The lower ear plate is welded to the side of the connecting seat support and extends obliquely upward. When the end face of the connecting flange is vertically normal, the through holes of the upper ear plate and the lower ear plate are aligned. The second pin is inserted into the through holes of the upper ear plate and the lower ear plate to keep the upper end face of the connecting flange horizontal.

[0011] Furthermore, the connecting seat lug is a triangle that is narrower at the top and wider at the bottom, and the connecting flange lug is a triangle that is wider at the top and narrower at the bottom. They are both symmetrical parallel plate structures, and the connecting flange lug is inserted between the two plates of the connecting seat lug.

[0012] Furthermore, reinforcing ribs are welded to the lower sides of the connecting seat and connected to the chassis.

[0013] Furthermore, the lower interface flange of the fully enclosed gate blowout preventer is connected to the connecting flange by screws or bolts.

[0014] Furthermore, hydraulic motors that provide power to the device body are installed on both sides of the upper end face of the movable crossbeam.

[0015] Furthermore, the cylinder body of the lifting cylinder is fixed on the lower and upper crossbeams, and the bottom of the cylinder body is provided with a wellhead mechanical spiral support leg; both ends of the movable crossbeam are fixedly connected to the piston rod of the lifting cylinder.

[0016] Compared with existing technologies, this utility model achieves the following beneficial effects: The live overhaul operation device equipped with a safety auxiliary mechanism described in this utility model can play a balancing and stabilizing role during the hoisting of the live overhaul operation device, preventing it from tilting or swaying. It can also effectively fix the device during transportation, making the hoisting and transportation process safer and more reliable. At the same time, the stable and safe hoisting process can reduce construction interruptions caused by device swinging or overturning, thereby improving work efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. The drawings are provided for reference and illustration only and are not intended to limit this utility model. Wherein:

[0018] Figure 1 This is a front view schematic diagram of the pressurized overhaul operation device described in the background art;

[0019] Figure 2 This is a side view of the pressurized overhaul operation device with a safety auxiliary mechanism described in this utility model;

[0020] Figure 3 This is a front view schematic diagram of the pressurized overhaul operation device with a safety auxiliary mechanism described in this utility model;

[0021] Figure 4 This is a three-dimensional schematic diagram of the pressurized overhaul operation device with safety auxiliary mechanism described in this utility model during lifting.

[0022] Figure 5 This is a three-dimensional schematic diagram of the chassis, connecting seat, connecting flange, and pillow block described in this utility model;

[0023] Figure 6 for Figure 5 A magnified view of a portion of the image;

[0024] Figure 7 for Figure 6 An explosion diagram;

[0025] Figure 8 This is a three-dimensional schematic diagram of the pressurized overhaul operation device with safety auxiliary mechanism described in this utility model during hoisting and transportation.

[0026] In the diagram: Device body: 1. Movable load-bearing slips; 2. Hydraulic motor; 3. Movable crossbeam; 4. Movable anti-overhead slips; 5. Upper crossbeam; 6. Annular blowout preventer; 7. Fixed slips; 8. Lower crossbeam; 9. Lifting cylinder; 10. Wellhead mechanical spiral support leg; 11. Safety slips; 12. Balanced pressure relief valve; 13. Lower semi-sealed gate blowout preventer; 14. Safety semi-sealed blowout preventer; 15. Fully sealed gate blowout preventer;

[0027] 16. Chassis; 17. Mounting lug; 18. Pillar block; 19. Connecting seat; 19a. Connecting seat lug; 19b. Lower lug plate; 20. Connecting flange; 20a. Connecting flange lug; 20b. Upper lug plate; 21. First pin; 22. Second pin. Detailed Implementation

[0028] To make the technical means, creative features, achieved objectives and effects of this utility model readily understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0030] like Figures 1 to 8 As shown, the pressurized overhaul device of this utility model with safety auxiliary mechanisms includes a device body, a chassis 16, a connecting seat 19, and a connecting flange 20. The device body includes a movable load-bearing slip 1, a hydraulic motor 2, a movable crossbeam 3, a movable anti-overhead slip 4, an upper crossbeam 5, an annular blowout preventer 6, a fixed slip 7, a lower crossbeam 8, a lifting cylinder 9, a wellhead mechanical spiral support leg 10, a safety slip 11, a balance pressure relief valve 12, a lower semi-sealed gate blowout preventer 13, a safety semi-sealed blowout preventer 14, and a fully sealed gate blowout preventer 15. The cylinder body of the lifting cylinder 9 is fixed on the lower crossbeam 8 and the upper crossbeam 5, and the bottom of the cylinder body is equipped with a wellhead mechanical spiral support leg 10. A lower sleeve is fixedly installed at the center of the lower crossbeam 8, and the safety slip 11, the lower semi-sealed gate blowout preventer 13, the safety semi-sealed blowout preventer 14, and the fully sealed gate blowout preventer 15 are connected in sequence below the lower sleeve, and all connections are fixed and sealed by clamps. The safety slip 11 has a side overflow hole equipped with a pressure relief valve 12; the fully enclosed gate blowout preventer 15 is located at the bottom of the device body, and the lower part of the fully enclosed gate blowout preventer 15 is provided with a lower interface flange.

[0031] A fixed slip 7 and an annular blowout preventer 6 are provided between the upper part of the lower sleeve and the upper crossbeam 5. The two ends of the movable crossbeam 3 are fixedly connected to the piston rods of the lifting cylinder 9. The upper sleeve is fixedly installed in the center of the movable crossbeam 3. The piston rods of the two lifting cylinders 9 are symmetrically distributed on both sides of the upper sleeve. A movable load-bearing slip 1 is fixed above the upper sleeve, and a movable anti-top slip 4 is fixed below the upper sleeve.

[0032] Safety slip 11, lower half-sealed gate blowout preventer 13, safety half-sealed blowout preventer 14, fully sealed gate blowout preventer 15, annular blowout preventer 6 and lifting cylinder 9 are all controlled by a hydraulic control system, and hydraulic motors 2 are installed on both sides of the moving crossbeam 3.

[0033] The chassis 16 is a flat plate structure used to house the device body and the fixed connecting seat 19. At least two support blocks 18 are provided on the chassis 16. When the device body is placed horizontally, it is supported on the chassis 16 by the support blocks 18, maintaining horizontal stability. Multiple hanging ears 17 are provided on the sides of the chassis 16. The hanging ears 17 have grooves, allowing the chassis 16 to be secured to the transport vehicle by ropes, preventing movement during transportation.

[0034] The connecting flange 20 is detachably connected to the lower interface flange of the fully enclosed gate blowout preventer 15 at the bottom of the device body. The lower end face of the connecting flange 20 is welded with a downwardly extending connecting flange lug 20a. The lower interface flange of the fully enclosed gate blowout preventer 15 is provided with bolt holes. The connecting flange 20 is connected to the lower interface flange of the fully enclosed gate blowout preventer 15 by a combination of screws and nuts or by bolts.

[0035] The bottom of the connecting seat 19 is welded to the middle of one end of the chassis 16. A connecting seat lug 19a is welded to the top plate of the connecting seat 19. The connecting seat lug 19a and the connecting flange lug 20a are hinged together by a first pin 21. The connecting seat lug 19a is a triangle that is narrower at the top and wider at the bottom, and the connecting flange lug 20a is a triangle that is wider at the top and narrower at the bottom. They are both symmetrical parallel plates, and the connecting flange lug 20a is inserted between the two plates of the connecting seat lug 19a. After being hinged together by the first pin, the connecting flange 20 can rotate relative to the connecting seat 19.

[0036] A limiting structure is provided between the connecting flange 20 and the connecting seat 19. The limiting structure keeps the upper end face of the connecting flange 20 horizontal, which facilitates connection with the lower interface flange of the fully enclosed gate blowout preventer 15.

[0037] The limiting structure consists of an ear plate and a second pin 22. An upper ear plate 20b extending downwards is welded to the side of the connecting flange support ear 20a, and a lower ear plate 19b extending upwards is welded to the side of the connecting seat support ear 19a. When the end face of the connecting flange 20 is vertical, the through holes of the upper ear plate 20b and the lower ear plate 19b are aligned. The second pin 22 is inserted into the through holes of the upper ear plate 20b and the lower ear plate 19b to keep the upper end face of the connecting flange 20 horizontal. The axis of the second pin 22 is parallel to the axis of the first pin.

[0038] Reinforcing ribs are welded to the lower sides of the connecting seat 19 to improve structural strength and increase the connection force with the chassis 16.

[0039] The working principle of this utility model is as follows:

[0040] Traditional live overhaul equipment experiences single-point stress at the highest point during hoisting. Due to its height, the equipment is prone to movement and swaying during hoisting. Long-term use can lead to damage to the equipment itself and the transport vehicle, and may even cause safety accidents due to improper hoisting operations.

[0041] This invention connects a detachable connecting flange 20 to the lower interface flange of the fully sealed gate blowout preventer 15 at the bottom of the device body. The connecting seat lug 19a and the connecting flange lug 20a are hinged together by a first pin, forming a fixed fulcrum. During lifting, the bottom of the device body remains connected to the chassis 16, while the upper part is slowly erected or slowly leveled to prevent the device from tilting or swaying under gravity, thereby improving overall balance.

[0042] During transportation, the live overhaul device is placed horizontally on the chassis 16, and the connecting seat lug 19a and the connecting flange lug 20a are hinged to each other by the first pin. Therefore, the live overhaul device no longer relies solely on gravity and friction to adhere to the vehicle, but is fixed to the chassis 16 by the connecting seat 19. The two ends of the crossbeam sidewall of the device body rest on the bolster block 18 to keep the device body horizontal.

[0043] The chassis 16 is fixed to the transport vehicle on both sides by the lugs 17 to prevent the device from moving around due to sudden braking or road conditions during driving.

[0044] When used in the oilfield, the vehicle travels to the vicinity of the wellhead and lifts the upper part of the device. During the erection process, the bottom of the device is limited by the connecting seat 19, forming a two-point force distribution, ensuring the stability and safety of the lifting process, reducing construction interruptions caused by device swaying or overturning, and thus improving work efficiency. After the device is fully erected, the insertion holes of the connecting seat lug 19a and the connecting flange lug 20a are aligned, and the second pin 22 is inserted. At this time, the end face of the connecting flange 20 remains horizontal and upward in a fixed position. Subsequently, the bolts or screws between the connecting flange 20 and the lower interface flange of the full-sealed gate blowout preventer 15 are removed, and the pressurized overhaul operation device is lifted to the wellhead for installation and overhaul operations.

[0045] After the well workover operation is completed, confirm that the second pin 22 is in the insertion device, that is, confirm that the upper end face of the connecting flange 20 is in a horizontal and upward fixed position. Then, hoist the pressurized overhaul operation device above the connecting flange 20, slowly lower the device body, and align the lower interface flange of the full-sealed gate blowout preventer 15 at the bottom of the device body with the connecting flange 20. Then, use studs or bolts to connect and lock the connecting flange 20 to the lower interface flange of the full-sealed gate blowout preventer 15. Then, remove the second pin 22 so that the connecting flange lug 20a can rotate relative to the connecting seat lug 19a. Then, slowly place the device body on the chassis 16 for transportation. The whole hoisting process is efficient and safe.

[0046] The above description is merely a preferred embodiment of the present utility model, showing and describing the basic principles, main features, and advantages of the present utility model. It is not intended to limit the scope of patent protection of the present utility model. Those skilled in the art should understand that the present utility model is not limited to the above embodiments. In addition to the above embodiments, the present utility model may have other implementations without departing from the spirit and scope of the present utility model. Various changes and improvements to the present utility model are also possible. All technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of protection claimed by the present utility model. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents. Technical features not described in the present utility model can be implemented by or using existing technology, and will not be elaborated here.

Claims

1. A live overhaul operation device equipped with a safety auxiliary mechanism, comprising a chassis (16) supporting the device body, the device body comprising a movable crossbeam (3), an upper crossbeam (5), a lower crossbeam (8), a lifting cylinder (9), and a fully sealed gate blowout preventer (15) located at the lowest part, characterized in that: The chassis (16) is a flat plate structure. A connecting seat (19) is welded to the middle of one end of the chassis (16). A connecting seat lug (19a) is welded to the top plate of the connecting seat (19). The upper end of the connecting seat lug (19a) is hinged to the connecting flange lug (20a) through the first pin (21). The connecting flange lug (20a) is welded to the lower end face of the connecting flange (20). The connecting flange (20) is detachably connected to the lower interface flange of the fully sealed gate blowout preventer (15).

2. The live overhaul operation device with a safety auxiliary mechanism according to claim 1, characterized in that, A limiting structure is provided between the connecting seat lug (19a) and the connecting flange lug (20a) to keep the upper end face of the connecting flange (20) horizontal.

3. The live overhaul operation device with a safety auxiliary mechanism according to claim 1, characterized in that, Two parallel pillow blocks (18) are provided on the chassis (16). When the device body is placed horizontally, one side of the upper crossbeam (5) and the lower crossbeam (8) is supported on the pillow blocks (18).

4. The live overhaul operation device with a safety auxiliary mechanism according to claim 1, characterized in that, The chassis (16) is provided with multiple hanging ears (17) on its side, and the hanging ears (17) are provided with grooves for ropes to be embedded.

5. The live overhaul operation device with a safety auxiliary mechanism according to claim 2, characterized in that, The limiting structure includes an upper ear plate (20b), a lower ear plate (19b), and a second pin (22). The upper ear plate (20b) is welded to the side of the connecting flange lug (20a) and extends obliquely downward. The lower ear plate (19b) is welded to the side of the connecting seat lug (19a) and extends obliquely upward. When the end face of the connecting flange (20) is vertical, the through holes of the upper ear plate (20b) and the lower ear plate (19b) are aligned. The second pin (22) is inserted into the through holes of the upper ear plate (20b) and the lower ear plate (19b) to keep the upper end face of the connecting flange (20) horizontal.

6. The live overhaul operation device with a safety auxiliary mechanism according to claim 1, characterized in that, The connecting seat lug (19a) is a triangle that is narrower at the top and wider at the bottom, and the connecting flange lug (20a) is a triangle that is wider at the top and narrower at the bottom. They are symmetrical parallel plate structures, and the connecting flange lug (20a) is inserted between the two plates of the connecting seat lug (19a).

7. The live overhaul operation device with a safety auxiliary mechanism according to claim 1, characterized in that, The lower sides of the connecting seat (19) are respectively welded with reinforcing ribs and connected to the chassis (16).

8. The live overhaul operation device with a safety auxiliary mechanism according to claim 1, characterized in that, The lower interface flange of the fully enclosed gate blowout preventer (15) is connected to the connecting flange (20) by screws or bolts.

9. The live overhaul operation device with a safety auxiliary mechanism according to claim 1, characterized in that, Hydraulic motors (2) for increasing power to the device body are installed on both sides of the upper end face of the movable crossbeam (3).

10. The live overhaul operation device with a safety auxiliary mechanism according to any one of claims 1 to 9, characterized in that, The cylinder body of the lifting cylinder (9) is fixed on the lower crossbeam (8) and the upper crossbeam (5), and the bottom of the cylinder body is provided with a wellhead mechanical spiral support leg (10); the two ends of the moving crossbeam (3) are fixedly connected to the piston rod of the lifting cylinder (9).

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