Portable speed-adjustable lifting device and blowout preventer

Abstract

The utility model discloses a portable speed-adjustable lifting device and a blowout preventer, which comprise a first sleeve arranged on wellhead equipment, a lifting mechanism hinged on the first sleeve, a second sleeve arranged on the lifting mechanism and connected with a lower trapper, a hydraulic cylinder arranged on the lifting mechanism, and a second sleeve arranged on the hydraulic cylinder and connected with the lower trapper. The hydraulic cylinder is connected with a hydraulic oil way, and a throttling valve is installed on the hydraulic oil way. A throttle valve is designed on a hydraulic oil way of a hydraulic cylinder of a lifting mechanism and is matched with an electric hydraulic station, so that the speed of a pipe string is more stable when the pipe string ascends and descends, a lifting hydraulic cylinder piston is provided with a limiting screw sleeve, so that the lifting blowout preventer is mounted on well mouths with different heights, and the lifting hydraulic cylinder piston is also used as a mechanical safety lock to limit the stroke of the piston; adjusting the installation height of the pipe string. The device is wide in application range, safe, light, reliable and easy and convenient to operate, operation cost and operation time can be greatly reduced, and on-site construction labor intensity is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of oil and gas field production well logging and testing equipment, in particular to a portable speed-adjustable lifting device and a blowout prevention device. Background Art

[0002] In cable logging and slickline well testing, the wellhead blowout preventer string is used to control the wellhead pressure and provide a pressure transition zone and accommodation space for the logging instrument string. The wellhead blowout preventer string usually includes a blowout preventer box (seal head), a catcher, a blowout preventer, a blowout preventer, etc. The specific composition and overall height of the blowout preventer string vary according to parameters such as the wellhead pressure and the length of the logging instrument. How to safely and reliably lift and install a five or six meter high blowout preventer string at the wellhead for construction operations is one of the problems currently faced by major oil fields in terms of energy conservation and efficiency improvement.

[0003] There are currently three main operating modes:

[0004] 1. The traditional and most widely used operation method uses lifting equipment. After the entire blowout preventer string is connected on the ground, the entire blowout preventer string is lifted by the lifting equipment to complete the alignment installation at the wellhead. However, this traditional lifting method also has the following problems:

[0005] a) The use and maintenance costs of lifting equipment are high and the work efficiency is low.

[0006] b) After the blowout preventer string is hoisted, it cannot be accurately positioned when connected to the wellhead, making installation difficult.

[0007] 2. The lubricant preventer vertical lifting system, this structure is supported by the ground and connected to the wellhead at the top. The lubricant preventers are lifted up by hydraulic guide rails and connected one by one, and then rotated and docked with the wellhead through the top rotating mechanism. However, this method also has the following problems.

[0008] a) The structure is complex. Under the complex structure, multiple structures work in coordination and the equipment is easily damaged.

[0009] b) The ability to adapt to wellheads is very poor, and it is unable to cope with complex wellheads and multi-pipeline wellheads.

[0010] c) The equipment and supporting equipment are numerous and large, requiring separate vehicles for transportation, which increases transportation costs and is more complicated to install.

[0011] 3. When facing some wellheads, a platform is built and directly connected and installed manually. However, this method is time-consuming and labor-intensive to build the platform, and there are great risks to personal safety. Utility Model Content

[0012] In view of the above defects or shortcomings, the purpose of the utility model is to provide a lightweight and speed-adjustable lifting device and a blowout prevention device.

[0013] In order to achieve the above purpose, the technical solution of the utility model is:

[0014] A portable and speed-adjustable lifting device comprises: a first sleeve mounted on a wellhead device, a lifting mechanism hinged on the first sleeve, a second sleeve connected to a lower catcher mounted on the lifting mechanism, a hydraulic cylinder mounted on the lifting mechanism, a hydraulic oil circuit connected to the hydraulic cylinder, and a throttle valve mounted on the hydraulic oil circuit.

[0015] A cylinder control valve is installed on the hydraulic oil circuit, the throttle valve is installed at the output end of the cylinder control valve, and the output end of the throttle valve is connected to the cylinder.

[0016] A limiting screw sleeve is installed at the output end of the hydraulic cylinder.

[0017] The first sleeve and the second sleeve are provided with locking bolts for adjusting the tightness.

[0018] The hydraulic oil circuit is connected with a hydraulic station.

[0019] A blowout prevention device comprises a wellhead conversion joint installed on a wellhead, wherein a lower catcher and a lifting device according to any one of claims 1 are installed on the wellhead conversion joint.

[0020] The wellhead conversion joint is provided with a ground wheel pulley, the lifting device is provided with a blowout preventer, and the end of the blowout preventer is provided with a sky pulley and a tension rope device.

[0021] Compared with the prior art, the beneficial effects of the utility model are:

[0022] The utility model provides a light and adjustable speed lifting device and blowout prevention device. By designing a throttle valve on the hydraulic oil circuit of the lifting mechanism, the speed of the pipe string can be more stable when it is lifted and lowered in cooperation with the electric hydraulic station. The lifting cylinder piston is designed with a limit screw sleeve, which allows the lifting blowout prevention device to be installed on wellheads at different heights. It also serves as a mechanical safety lock, limits the piston stroke, and adjusts the installation height of the pipe string. The utility model device has a wide range of applications, is safe, light, reliable, and easy to operate, which can greatly reduce operating costs and operating time, and reduce the labor intensity of on-site construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the lifting device of the utility model;

[0024] Figure 2 This is a schematic diagram of the utility model anti-blowout device Figure 1 ;

[0025] Figure 3This is a schematic diagram of the utility model anti-blowout device Figure 2 .

[0026] In the figure, 1 is the first sleeve; 2 is the lifting mechanism; 3 is the second sleeve; 4 is the lower catcher; 5 is the locking screw; 6 is the hydraulic cylinder control valve; 7 is the wellhead; 8 is the wellhead conversion joint; 9 is the ground pulley; 10 is the blowout preventer; 11 is the overhead pulley; 12 is the hydraulic station; 13 is the rope tensioning device; 21 is the hydraulic cylinder; 22 is the hydraulic oil circuit; 23 is the throttle valve; 24 is the limit screw sleeve. DETAILED DESCRIPTION

[0027] The utility model will be described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0028] like Figure 1 As shown, the utility model provides a portable and speed-adjustable lifting device, comprising: a first sleeve 1 installed on the wellhead equipment, a lifting mechanism 2 is hinged on the first sleeve 1, a second sleeve 3 connected to a lower catcher 4 is installed on the lifting mechanism 2, a hydraulic cylinder 21 is installed on the lifting mechanism 2, a hydraulic oil circuit 22 is connected to the hydraulic cylinder 21, and a throttle valve 23 is installed on the hydraulic oil circuit 22.

[0029] Preferably, in the utility model, a cylinder control valve 6 is installed on the hydraulic oil circuit 22, and the throttle valve 23 is installed at the output end of the cylinder control valve 6, and the output end of the throttle valve 23 is connected to the cylinder 21. The throttle valve 23 in the utility model can make the speed of the pipe string more stable when it is lifted and lowered.

[0030] Furthermore, a limiting screw sleeve 24 is installed at the output end of the hydraulic cylinder 21. The limiting screw sleeve designed for the hydraulic cylinder piston allows the lifting blowout prevention device to be installed on wellheads at different heights, and also serves as a mechanical safety lock, limiting the piston stroke and adjusting the installation height of the pipe string.

[0031] The first sleeve 1 and the second sleeve 3 are provided with locking bolts 5 for adjusting tightness, which can directly adjust the tightness of each joint and the mounting device, thereby achieving better fixation and installation.

[0032] In addition, the hydraulic oil circuit 22 in the present invention is connected to a hydraulic station 12 , which can provide power for the hydraulic cylinder 21 .

[0033] In addition, if Figure 2 , 3As shown, the utility model further provides a blowout prevention device, comprising a wellhead conversion joint 8 installed on a wellhead 7, on which a lower catcher 4 and the lifting device described in the above embodiment are installed.

[0034] Furthermore, a ground pulley 9 is installed on the wellhead conversion joint 8, a lubricant preventer 10 is installed on the lifting device, and a sky pulley 11 and a rope tensioning device 13 are installed at the end of the lubricant preventer 10.

[0035] It should be noted that the main body material of the sealing head, blowout preventer 10, lifting device, lower catcher 4, and wellhead conversion joint 8 is made of titanium alloy. The titanium alloy blowout preventer has the advantages of high strength and light weight of the same specification. Under the same specification, the lifting effective weight (tool string weight) is large, the equipment is light, and a single person can move, transport, and install the titanium alloy lifting blowout preventer. At the same time, a throttle valve 23 and a limiting screw sleeve 24 are designed on the lifting bracket; the throttle valve 23 can make the blowout preventer better controlled during the lifting and lowering process, and the blowout preventer can be lifted and lowered smoothly; the limiting screw sleeve 24 can make the lifting device better adapt to wellheads of different heights, and at the same time protect the sealing head, the top pulley and the blowout preventer when a fault occurs in the hydraulic oil circuit to prevent them from colliding with the ground. The whole set of blowout preventers has a large effective load, is safe and reliable, can greatly reduce the cost of oilfield logging, and greatly reduce the labor intensity of on-site construction.

[0036] The installation process of the utility model blowout prevention device is as follows:

[0037] 1. First install the wellhead conversion joint 8 to the wellhead 7;

[0038] 2. Connect the lower catcher 4;

[0039] 3. Install the hydraulic lifting device (in the tilted open state) on the lower catcher 4 and connect the hydraulic control pipeline. Open the hydraulic cylinder control valve 6, pressurize the hydraulic station 12, extend the hydraulic cylinder piston to the maximum position and then close the hydraulic cylinder control valve 6. (Instructions for the hydraulic station controller: the up button on the handle increases pressure, and the down button reduces pressure).

[0040] 4. Arrange and assemble the blowout preventer string on the ground in sequence along the axis of the horizontal lifting frame sleeve: "(lifting mechanism 2+blowout preventer, 1+stringer device 13)"; install the pipe string on the hydraulic lifting device, tighten the locking bolt, and clamp it in the limit groove of the second sleeve of the hydraulic lifting device;

[0041] 5. Put the tool string into the blowout preventer 10, and install the sealing head and various pipelines;

[0042] 6. Open the lifting cylinder control valve 6, use the hydraulic station 12 to operate the lifting cylinder 21, push its piston to the maximum stroke position, so that the surface blowout preventer string is slowly lifted from the ground horizontal position to the wellhead vertical installation position along with the hydraulic lifting device, close the lifting cylinder control valve 6, and loosen the locking screw on the sleeve of the hydraulic lifting device;

[0043] 8. Open the control valve of the lifting cylinder to slowly release the pressure. The piston in the lifting cylinder slowly retreats to the initial zero position, thereby controlling the lower male cone end of the blowout preventer string to slowly insert into the upper female cone end of the lower catcher, and tighten the connecting union nut;

[0044] 9. The lifting operation of the blowout preventer string is completed;

[0045] Disassembly steps

[0046] 1. After making sure that the residual pressure in the wellhead blowout preventer string has been completely removed, remove the union nut between the second sleeve of the hydraulic lift and the lower catcher;

[0047] 2. Open the lifting cylinder control valve, use the hydraulic station to operate the lifting cylinder, push its piston to the maximum stroke position, so that the blowout preventer string installed at the wellhead is lifted and disengaged, lock its sleeve top thread locking screw, and close the lifting cylinder control valve;

[0048] 3. Open the lifting cylinder control valve to slowly release the pressure, and its piston returns to the initial stroke zero position, so that the blowout preventer string erected at the wellhead is slowly placed from the vertical installation position at the wellhead to the horizontal position on the ground along with the lifting frame, and close the lifting cylinder control valve;

[0049] 4. Loosen the top screw locking screw on the lifting frame sleeve and pull out the blowout preventer string that has been tilted to the ground from the hydraulic lifting device sleeve;

[0050] 5. Loosen the top screw locking screw on the sleeve of the hydraulic lifting device and remove the entire device;

[0051] 6. The disassembly work is completed.

[0052] It is obvious to those skilled in the art that the above-mentioned specific examples are only preferred schemes of the present invention. Therefore, the improvements and changes that may be made by those skilled in the art to certain parts of the present invention still reflect the principles of the present invention and achieve the purpose of the present invention, and all belong to the scope of protection of the present invention.

Claims

1. A lightweight and speed-adjustable lifting device, characterized in that: include: A first sleeve (1) is installed on a wellhead device, a lifting mechanism (2) is hinged on the first sleeve (1), a second sleeve (3) connected to a lower catcher (4) is installed on the lifting mechanism (2), a hydraulic cylinder (21) is installed on the lifting mechanism (2), a hydraulic oil circuit (22) is connected to the hydraulic cylinder (21), and a throttle valve (23) is installed on the hydraulic oil circuit (22).

2. The portable speed-adjustable lifting device according to claim 1, characterized in that: A cylinder control valve (6) is installed on the hydraulic oil circuit (22), the throttle valve (23) is installed at the output end of the cylinder control valve (6), and the output end of the throttle valve (23) is connected to the cylinder (21).

3. The portable speed-adjustable lifting device according to claim 1 or 2, characterized in that: The output end of the hydraulic cylinder (21) is provided with a limit screw sleeve (24).

4. The portable speed-adjustable lifting device according to claim 1, characterized in that: The first sleeve (1) and the second sleeve (3) are provided with locking bolts (5) for adjusting the tightness.

5. The portable speed-adjustable lifting device according to claim 1, characterized in that: The hydraulic oil circuit (22) is connected to a hydraulic station (12).

6. A blowout prevention device, characterized in that: It comprises a wellhead conversion joint (8) installed on a wellhead (7), on which a lower catcher (4) and a lifting device according to any one of claims 1 to 5 are installed.

7. The blowout prevention device according to claim 6, characterized in that: The wellhead conversion joint (8) is provided with a ground wheel (9), the lifting device is provided with a blowout preventer (10), and the end of the blowout preventer (10) is provided with a sky pulley (11) and a tension rope device (13).

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