Downhole operation device for non-metal composite coiled tubing

Abstract

The invention relates to the technical field of rodless oil extraction, in particular to a non-metal composite coiled tubing downhole operation device. The downhole operation device for the non-metal composite coiled tubing comprises a workover rig, a guider, a clamping mechanism, a blowout preventer, a hydraulic station and a winding mechanism for winding the non-metal composite coiled tubing, and the workover rig hoists the guider and the clamping mechanism to the position above the blowout preventer at a wellhead. The non-metal composite coiled tubing sequentially passes through the guider, the clamping mechanism and the blowout preventer and then goes into a well, and the clamping mechanism is connected with the hydraulic station. According to the downhole operation device for the non-metal composite coiled tubing, through cooperation of the clamping mechanism and the workover rig, complex splicing is not needed in the working process, the equipment mounting and dismounting time is saved, meanwhile, a special operation vehicle is not needed, and the working efficiency is improved. When the equipment is conveyed, the equipment can normally pass on oil field roads in mountainous areas, low-lying areas and rainy season environments.

Description

Technical Field

[0001] The present invention relates to the technical field of rodless oil production, and in particular to a non-metallic composite material continuous oil pipe downhole operation device. Background Art

[0002] In the field of rodless oil production, non-metallic composite coiled tubing has been initially applied and achieved good results. However, there is no operating equipment developed specifically for this application in China. In the existing technology, the operating equipment used in rodless oil production systems using non-metallic composite coiled tubing is still based on the current metal coiled tubing operating equipment. Most of them use assembled four-post work platforms and work vehicles for operation. The assembly and disassembly of assembled work machines and work platforms is very inconvenient and time-consuming, affecting operational efficiency. The work vehicles are expensive and too long to be able to smoothly navigate oilfield roads in mountainous areas, low-lying areas, and rainy seasons. Therefore, short-term inability to operate can easily affect oil well production. Summary of the Invention

[0003] (1) Technical issues to be resolved In response to the shortcomings of the existing technology, the present invention provides a non-metallic composite continuous oil pipe downhole operation device, which solves the problems of existing rodless oil production equipment using non-metallic composite continuous oil pipes, such as long assembly and disassembly time due to structural limitations of the working equipment, and the operating vehicle is too long to travel smoothly on oil field roads in mountainous areas, low-lying areas, and rainy season environments.

[0004] (2) Technical solution In order to solve the above problems, the present invention provides a non-metallic composite material coiled tubing downhole operation device, comprising: A workover rig, a guide, a clamping mechanism, a blowout preventer, a reeling mechanism, and a hydraulic station; the blowout preventer is installed at the operating wellhead, a clamping mechanism is provided directly above the blowout preventer, and the workover rig lifts the guide; one end of the non-metallic composite material coiled tubing is wound around the reeling mechanism, which is extended and retracted by rotating the reeling mechanism, while the other end passes through the guide to adjust the direction of the non-metallic composite material coiled tubing and vertically downward through the clamping mechanism and the blowout preventer before extending into the well; the hydraulic station serves as a power source and is connected to the clamping mechanism to control the working state of the clamping mechanism.

[0005] Preferably, the guide is a gooseneck guide, which can adjust its direction at any time.

[0006] Preferably, the hydraulic station is provided with a power-off self-locking protection function. If the power is suddenly cut off during operation, the hydraulic station will charge the pressure to control the clamping mechanism to clamp the non-metallic composite material coiled tubing.

[0007] Preferably, the clamping mechanism comprises an upper hydraulic clasper and a lower hydraulic clasper, and the upper hydraulic clasper is located directly above the lower hydraulic clasper.

[0008] Preferably, the upper hydraulic clamp is hoisted by a workover rig.

[0009] Preferably, the winding mechanism includes a winding frame and a reel. The winding frame is fixed in position. The reel is connected to the non-metallic composite material coiled tubing. The non-metallic composite material coiled tubing is recovered and released by rotating the reel.

[0010] Preferably, an operating console is provided next to the hydraulic station, and the operating console is connected to the hydraulic station and the workover rig at the same time to control the actions of the hydraulic station and the workover rig.

[0011] Preferably, the operating table is provided with a plurality of working gears, and each working gear corresponds to a working state of the upper hydraulic clamp and the lower hydraulic clamp.

[0012] Preferably, there are at least three working gears, including N gear, M gear and S gear. When the N gear is started, the upper hydraulic clamp is clamped and the lower hydraulic clamp is released; when the M gear is started, the upper hydraulic clamp and the lower hydraulic clamp are clamped at the same time; when the S gear is started, the upper hydraulic clamp is released and the lower hydraulic clamp is clamped.

[0013] (3) Beneficial effects The non-metallic composite continuous oil pipe downhole operation device provided by the present invention cooperates with the clamping mechanism and the well repair machine, does not require complicated assembly during operation, saves time for equipment installation and disassembly, and does not require special operation vehicles. When transporting the equipment, it can pass normally on oil field roads in mountainous areas, low-lying areas, and rainy season environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic structural diagram of the non-metallic composite material coiled tubing downhole operation device of the present invention.

[0015] Among them, 1. Well repair machine; 2. Guide; 3. Upper hydraulic clamp; 4. Lower hydraulic clamp; 5. BOP; 6. Winding mechanism; 7. Hydraulic station; 8. Operating table. DETAILED DESCRIPTION

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by “upper”, “lower”, “inside”, “outside”, “top”, “bottom”, etc. are all based on the orientations or positional relationships shown in the accompanying drawings. The purpose is only to facilitate the description of the present invention and simplify the description. It does not indicate or imply that the referred parts must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0018] like Figure 1 As shown, the present invention provides a non-metallic composite coiled tubing downhole operation device, specifically comprising: a workover rig 1, a guide 2, a clamping mechanism, a blowout preventer 5, a reeling mechanism 6, and a hydraulic station 7. The reeling mechanism 6 is provided with a non-metallic composite coiled tubing, and the non-metallic composite coiled tubing is wound around the reeling mechanism 6. The non-metallic composite coiled tubing can be retrieved or extended at any time by rotating the reeling mechanism 6. Furthermore, after being wound around the reeling mechanism 6, the non-metallic composite coiled tubing can be directly transported via the transfer reeling mechanism.

[0019] Among them, the winding mechanism 6 includes a winding frame and a reel. The reel is installed on the winding frame, and the non-metallic composite material continuous oil pipe is wound on the reel. During operation, the reel is horizontally installed on the winding frame, and the winding frame stably fixes the reel on the ground. At this time, the non-metallic composite material continuous oil pipe can be recovered and extended by rotating the reel.

[0020] It should be noted that the winding frame and the reel are detachably connected, and the reel can be disassembled and transported separately from the winding frame during transportation, which is convenient for transportation.

[0021] In the present invention, the blowout preventer 5 is an existing device installed at the wellhead of the target well. The non-metallic composite coiled tubing passes through the blowout preventer 5 and is lowered into the well. During operation, the blowout preventer 5 seals the non-metallic composite coiled tubing to prevent oil and gas from escaping from the wellbore. The clamping mechanism includes an upper hydraulic clamp 3 and a lower hydraulic clamp 4. The lower hydraulic clamp 4 is installed at the outlet of the blowout preventer 5, with the upper hydraulic clamp 3 positioned directly above the lower hydraulic clamp 4. The non-metallic composite coiled tubing passes through the upper hydraulic clamp 3 and the lower hydraulic clamp 4 in sequence from top to bottom, then passes through the blowout preventer 5 and is lowered into the well. When the upper and lower hydraulic clamps 3 and 4 are activated, they clamp the non-metallic composite coiled tubing and secure it in place.

[0022] The upper and lower hydraulic clamps 3 and 4 are connected to a hydraulic station 7, which acts as a power source to control the operating states of the upper and lower hydraulic clamps 3 and 4. Typically, the upper hydraulic clamp 3 is hoisted mid-air by the workover rig 1. After the lower hydraulic clamp 4 releases the non-metallic composite coiled tubing, the upper hydraulic clamp 3 is activated to clamp the non-metallic composite coiled tubing. The workover rig 1 then controls the upper hydraulic clamp 3 to move up and down, coordinating with the rotation of the reeling mechanism 6 to pull the non-metallic composite coiled tubing downward or upward.

[0023] It should be noted that an operating table 8 is provided next to the hydraulic station 7, and the operating table 8 is connected to the hydraulic station 7 and the workover rig 1. The operating table 8 can control the movement state of the hydraulic station 7 and the workover rig 1 and control the operation of the device, thereby reducing the operating difficulty of the device and reducing the workload of the device operation.

[0024] In addition, in order to ensure the normal operation of the device, when installing the lower hydraulic clamp 4, it is necessary to first insert the non-metallic composite material continuous oil pipe into the blowout preventer 5, then lift the lower hydraulic clamp 4 to the non-metallic composite material continuous oil pipe, control the lower hydraulic clamp 4 to clamp the non-metallic composite material continuous oil pipe, and then lower the lower hydraulic clamp 4 to the blowout preventer 5 and tighten the connecting bolts.

[0025] In the present invention, when operating the control panel 8, the control panel 8 is configured with three gears: N, M, and S. When N gear is activated, the upper hydraulic clamp 3 clamps and the lower hydraulic clamp 4 releases; when M gear is activated, both the upper and lower hydraulic clamps 3 and 4 clamp simultaneously; and when S gear is activated, the upper hydraulic clamp 3 releases and the lower hydraulic clamp 4 clamps. During operation, the control panel 8 is first set to N gear, and the upper hydraulic clamp 3 is moved up and down by the workover rig to pull the non-metallic composite coiled tubing out of or into the oil well. The control panel 8 is then set to S gear, and the upper hydraulic clamp 3 is moved up and down by the workover rig to its original position. These steps are repeated to complete the operation of lowering the non-metallic composite coiled tubing into the well.

[0026] Because the hydraulic station 7 can adjust its own hydraulic pressure, and the clamping force of the upper and lower hydraulic clamps 3 and 4 is related to the hydraulic pressure of the hydraulic station 7, more operating positions can be set according to actual needs. To ensure operational safety, the operating state of each position requires that at least one of the upper and lower hydraulic clamps 3 and 4 is in the clamping state.

[0027] It should be noted that the hydraulic station 7 is provided with a power-off self-locking protection function. If the power is suddenly cut off during operation, the hydraulic station 7 will charge and control the upper hydraulic clamp 3 and the lower hydraulic clamp 4 to clamp, preventing the non-metallic composite continuous oil pipe from falling and causing a safety accident.

[0028] like Figure 1 As shown, the guide 2 is fixed in position after being hoisted by the workover rig 1. After the non-metallic composite material continuous oil pipe passes through the guide 2, the guide 2 fixes the bending direction of the non-metallic composite material continuous oil pipe, so that the non-metallic composite material continuous oil pipe can pass through the upper hydraulic clamp 3, the lower hydraulic clamp 4 and the blowout preventer 5 in sequence after being lowered into the well.

[0029] The guide 2 is a gooseneck guide, and the shape of the guide 2 can be adjusted according to actual conditions during use, thereby adjusting the bending direction of the non-metallic composite material continuous oil pipe and improving the practicality of the device.

[0030] During transportation, the various components of the non-metallic composite continuous tubing downhole operation device can be disassembled and transported separately or flexibly transported according to actual conditions, which greatly reduces the difficulty of transportation. In particular, smaller and more flexible transportation equipment can be used on oil field roads in mountainous areas, low-lying areas and rainy season environments, thereby improving oil field operation efficiency and reducing the impact of transportation problems on oil well production.

[0031] The non-metallic composite material coiled tubing downhole operation device provided by the present invention has the following specific operation process: Step 1: Install the blowout preventer at the working wellhead, lift the guide, pass the non-metallic composite material coiled tubing on the reel through the guide and connect it to the pump unit, then pass the connected non-metallic composite material coiled tubing and pump unit downward through the blowout preventer and place them into the well.

[0032] Step 2: When the BOP is fully covered by the coiled tubing, stop lowering and use the workover rig to lift the lower hydraulic clamp and fasten it to the non-metallic composite coiled tubing. Control the lower hydraulic clamp to clamp the non-metallic composite coiled tubing and lower it onto the BOP.

[0033] Step 3: Use the workover rig to lift the upper hydraulic clamp to just above the lower hydraulic clamp, snap it onto the non-metallic composite coiled tubing, and clamp the non-metallic composite coiled tubing. Connect the operating console, hydraulic station, workover rig, and upper and lower hydraulic clamps in sequence. This completes the installation.

[0034] Step 4: Adjust the control gear to N on the console and raise or lower the upper hydraulic clamp as required. During this process, the lower hydraulic clamp is in the relaxed state and the upper hydraulic clamp is in the tightened state. The non-metallic composite coiled tubing will be raised or lowered into the well as the upper hydraulic clamp moves up and down.

[0035] Step 5: Use the console to adjust the control gear to S and restore the upper hydraulic clamp to its original position. During this process, the upper hydraulic clamp is in a relaxed state, while the lower hydraulic clamp is in a tightened state. The lower hydraulic clamp secures the non-metallic composite coiled tubing, while the upper hydraulic clamp can move freely up and down without affecting the non-metallic composite coiled tubing.

[0036] Step 6: Repeat steps 4 and 5 to achieve continuous lowering and lifting of the non-metallic composite material coiled tubing.

[0037] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A non-metallic composite material coiled tubing downhole operation device, characterized in that: include: A workover rig (1), a guide (2), a clamping mechanism, a blowout preventer (5), a reeling mechanism (6) and a hydraulic station (7); the blowout preventer (5) is installed at the working wellhead, a clamping mechanism is provided just above the blowout preventer (5), and the workover rig (1) lifts the guide (2); one end of a non-metallic composite continuous oil pipe is wound around the reeling mechanism (6) and extended and retracted by rotating the reeling mechanism (6); the other end is provided with a pump unit and passes through the guide (2), adjusts the direction, and then vertically downwardly passes through the clamping mechanism and the blowout preventer (5) and extends into the well; the hydraulic station (7) is connected to the clamping mechanism as a power source and controls the working state of the clamping mechanism.

2. The non-metallic composite material coiled tubing downhole operation device according to claim 1, characterized in that: The guide (2) is a gooseneck guide, which can adjust its direction at any time.

3. The non-metallic composite material coiled tubing downhole operation device according to claim 1, characterized in that: The hydraulic station (7) is provided with a power-off self-locking protection function. If the power is suddenly cut off during operation, the hydraulic station (7) controls the clamping mechanism to clamp the non-metallic composite material continuous oil pipe by charging pressure.

4. The non-metallic composite material coiled tubing downhole operation device according to claim 3, characterized in that: The clamping mechanism comprises an upper hydraulic clamp (3) and a lower hydraulic clamp (4), wherein the upper hydraulic clamp (3) is located directly above the lower hydraulic clamp (4).

5. The non-metallic composite material coiled tubing downhole operation device according to claim 4, characterized in that: The upper hydraulic clamp (3) is hoisted by the workover rig (1).

6. The non-metallic composite material coiled tubing downhole operation device according to claim 1, characterized in that: The winding mechanism (6) comprises a winding frame and a reel, wherein the winding frame is fixed in position, the reel is connected to the non-metallic composite material continuous oil pipe, and the non-metallic composite material continuous oil pipe is recovered and released by rotating the reel.

7. The non-metallic composite material coiled tubing downhole operation device according to claim 1, characterized in that: An operating console (8) is provided next to the hydraulic station (7), and the operating console (8) is connected to the hydraulic station (7) and the workover rig (1) to control the actions of the hydraulic station (7) and the workover rig (1).

8. The non-metallic composite material coiled tubing downhole operation device according to claim 7, characterized in that: The operating table (8) is provided with a plurality of working gears, each working gear corresponding to a working state of the upper hydraulic clamp (3) and the lower hydraulic clamp (4).

9. The non-metallic composite material coiled tubing downhole operation device according to claim 8, characterized in that: There are at least three working gears, including N gear, M gear and S gear. When the N gear is started, the upper hydraulic clamp (3) is clamped and the lower hydraulic clamp (4) is released; when the M gear is started, the upper hydraulic clamp (3) and the lower hydraulic clamp (4) are clamped at the same time; when the S gear is started, the upper hydraulic clamp (3) is released and the lower hydraulic clamp (4) is clamped.

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