Self-sealing well type gas well oil extraction vehicle

Abstract

The utility model aims to provide a self-sealing well type gas well oil production vehicle, and belongs to the technical field of movable oil production vehicles in oil and gas fields. The device comprises a chassis, an auxiliary beam, a derrick and a hydraulic system, a blowout preventer platform is arranged on a rear bracket of the derrick, and a blowout preventer is mounted on the blowout preventer platform; the hydraulic system is composed of a first hydraulic system and a second hydraulic system, and hydraulic power is provided for the first hydraulic system and the second hydraulic system through a double pump driven by a chassis side power takeoff. The first hydraulic system controls the chassis front supporting leg cylinder, the chassis rear supporting leg cylinder and the lifting cylinder through the hydraulic cylinder multi-union valve set. And the second hydraulic system controls the blowout preventer through the blowout preventer driving system to realize dynamic plugging of the wellhead of the gas well with pressure. The oil extraction and fishing device integrates the functions of oil extraction and fishing operation of a conventional oil extraction vehicle and dynamic plugging of a wellhead with pressure, can achieve conventional gas-free oil well extraction and fishing operation and oil well extraction and fishing operation of oil-containing natural gas, and expands the application range of the equipment.

Description

TECHNICAL FIELD

[0001] The utility model relates to a mobile oil extraction vehicle, especially to a gas well special oil extraction vehicle with a blowout prevention system, which is suitable for fishing operations of natural gas wells with pressure. BACKGROUND

[0002] The conventional oil extraction vehicle is mainly used for fishing operations of conventional oil wells, and its structural design only supports fishing operations of non-gas oil wells. However, when there is natural gas with pressure in the oil well, the fishing operation may cause natural gas to leak from the wellhead, leading to safety accidents of flammable and toxic gas diffusion. There is a lack of mobile oil extraction equipment integrated with blowout prevention function in the prior art, which leads to the need for additional blowout prevention devices during the operation of the gas well with pressure, and the operation is complex and costly. Therefore, a motorized equipment integrating fishing operation and wellhead plugging function is urgently needed to solve the above technical defects. SUMMARY

[0003] The self-sealing gas well oil extraction vehicle realizes dynamic plugging of the wellhead with pressure during fishing operation through the design of the first hydraulic system and the second hydraulic system, meets the requirements of gas wellhead anti-toxic, anti-explosion and anti-blowout, solves the technical problem that the existing mobile oil extraction vehicle can only operate in non-gas oil wells, and has the advantages of simple structure, compactness, low cost, safety and reliability.

[0004] To achieve the above purpose, the utility model adopts the following technical scheme: a self-sealing gas well oil extraction vehicle, comprising a chassis, a sub-beam, a derrick and a hydraulic system, the sub-beam is provided with a derrick front support, an operating room, a winch, a lifting cylinder and a derrick rear support from front to rear, the two sides of the sub-beam are respectively provided with a chassis front leg cylinder and a chassis rear leg cylinder, the derrick rear support is provided with a blowout preventer platform, and the blowout preventer platform is installed with a blowout preventer.

[0005] The hydraulic system is composed of a first hydraulic system and a second hydraulic system, both of which are driven by a double pump of the chassis side power takeoff to provide hydraulic power.

[0006] The first hydraulic system comprises a hydraulic cylinder multi-connection valve group, a chassis front leg cylinder, a chassis rear leg cylinder and a lifting cylinder, and the chassis front leg cylinder, the chassis rear leg cylinder and the lifting cylinder are controlled by the hydraulic cylinder multi-connection valve group.

[0007] The second hydraulic system comprises a blowout preventer driving system and a blowout preventer, and the blowout preventer driving system controls the blowout preventer to realize dynamic plugging of the wellhead with pressure.

[0008] As an improvement of the utility model, the blowout preventer driving system comprises an accumulator and an accumulator multi-connection valve, and the accumulator is arranged on the sub-beam between the operating room and the winch.

[0009] As an improvement of the utility model, the blowout preventer driving system further comprises a safety ball valve and a pressure relief valve.

[0010] As an improvement of the utility model, the hydraulic cylinder multi-way valve group is arranged at the tail position of the side of the sub-beam, and the accumulator multi-way valve is arranged at the middle position of the side of the sub-beam.

[0011] As an improvement of the utility model, the tail of the sub-beam is provided with a truck-mounted small crane for hoisting the blowout preventer to the wellhead.

[0012] The utility model has the advantages that the utility model integrates the oil production and fishing operation of a conventional oil production truck and the function of dynamically plugging a wellhead under pressure, prevents natural gas under pressure from leaking, and meets the requirements of preventing gas wellheads from being poisoned, exploded and blown out.

[0013] Further, the blowout preventer driving system comprises an accumulator and an accumulator multi-way valve, the accumulator is arranged on the sub-beam between the operation room and the winch.

[0014] Further, the blowout preventer driving system further comprises a safety ball valve and a pressure relief valve.

[0015] Further, the hydraulic cylinder multi-way valve group is arranged at the tail position of the side of the sub-beam, and the accumulator multi-way valve is arranged at the middle position of the side of the sub-beam.

[0016] Further, the tail of the sub-beam is provided with a truck-mounted hydraulic small crane for hoisting the blowout preventer to the wellhead, and the truck-mounted hydraulic small crane is controlled by the hydraulic cylinder multi-way valve group. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a whole structure schematic view of the utility model;

[0018] Figure 2 is a working state schematic view of the utility model;

[0019] Figure 3 is a hydraulic system principle view of the utility model.

[0020] In the figure, 1, chassis; 2, sub girder; 3, power unit; 4, chassis front support leg cylinder; 5, full power power takeoff; 6, accumulator multi-connection valve; 7, winch; 8, truck-mounted small crane; 9, chassis rear support leg cylinder; 10, well frame rear support leg cylinder; 11, blowout preventer platform; 12, blowout preventer; 13, hydraulic cylinder multi-connection valve group; 14, lifting cylinder; 15, accumulator; 16, operating room; 17, well frame; 18, fishing operation wire rope; 19, small crane rope; 20, blowout preventer connecting pipeline; 21, hydraulic oil tank; 22, overflow valve; 23, safety ball valve; 24, pressure relief valve. DETAILED DESCRIPTION

[0021] The embodiments of the utility model are described in detail below, the examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and cannot be explained as the limitation of the utility model.

[0022] It should be noted that the up, down, front, back, left, right and other orientation terms in the embodiments of the utility model are only relative concepts or are referenced to the normal use state of the product, and should not be considered as limiting.

[0023] For example, Figure 1 , Figure 2 and Figure 3As shown, a self-sealing well gas well truck includes a chassis 1, a sub-beam 2, a derrick 17 and a hydraulic system, the sub-beam 2 is provided with a derrick front support, an operating room 16, a winch 7, a lifting cylinder 14 and a derrick rear support from front to rear in sequence, the sub-beam 2 is provided with a chassis front leg cylinder 4 and a chassis rear leg cylinder 9 on both sides respectively, the derrick rear support is provided with a blowout preventer platform 11, the blowout preventer platform 11 is installed with a blowout preventer 12, the blowout preventer platform 11 is a rectangular or U-shaped steel plate structure, the bottom is provided with a fixed lug plate matched with the derrick rear support, and the rigid connection is realized through bolts or welding. The hydraulic system is composed of a first hydraulic system and a second hydraulic system, and the first hydraulic system and the second hydraulic system are both provided with hydraulic power by a double pump 3 driven by a chassis side power take-off. The first hydraulic system includes a hydraulic cylinder multi-connection valve group 13, a chassis front leg cylinder 4, a chassis rear leg cylinder 9 and a lifting cylinder 14, and the chassis front leg cylinder 4, the chassis rear leg cylinder 9 and the lifting cylinder 14 are controlled through the hydraulic cylinder multi-connection valve group 13; the second hydraulic system includes a blowout preventer driving system and a blowout preventer 12, and the blowout preventer 12 is controlled through the blowout preventer driving system to realize dynamic plugging of the wellhead of the well with pressure. The power input end of the full-power power take-off 5 is connected with the chassis engine through a transmission shaft, the power output end is provided with two paths in interlocking, one path drives the chassis to walk through a transmission shaft, the other path drives the winch 7 through a transmission shaft, and the side power take-off drives the double pump 3 to work.

[0024] It should be noted that the first hydraulic system and the second hydraulic system commonly use one hydraulic oil tank 21, which is connected with the double pump 3 through a hydraulic pipeline. Preferably, the hydraulic oil tank 21 is arranged at the tail position of the sub-beam 2, the hydraulic oil tank 21 is connected with the double pump 3 through a hydraulic pipeline, the hydraulic pipeline is arranged along the chassis longitudinal beam, and the oil circulation efficiency is ensured; at the same time, arranging the hydraulic oil tank 21 at the tail position of the sub-beam 2 is also convenient for maintenance (such as oil filling, filter element replacement, etc.) and reduces the space occupation of the operation area, and the structure is compact and the whole vehicle is balanced in stress.

[0025] The blowout preventer driving system includes an accumulator 15, an accumulator multi-connection valve 6, a safety ball valve 23, a pressure relief valve 24 and an overflow valve 22, and the accumulator 15 is arranged on the sub-beam 2 between the operating room 16 and the winch 7. The blowout preventer 12 is connected with the accumulator multi-connection valve 6 through a blowout preventer connecting pipeline 20.

[0026] The hydraulic cylinder multi-connection valve group 13 is arranged at the tail position of one side of the sub-beam 2, and the accumulator multi-connection valve 6 is arranged at the middle position of one side of the sub-beam 2. Preferably, the hydraulic cylinder multi-connection valve group 13 and the accumulator multi-connection valve 6 are arranged on the same side, which is convenient for operation.

[0027] The tail of the sub-beam 2 is provided with a hydraulic small crane 8 for hoisting the blowout preventer 12 to the wellhead, and the hydraulic small crane 8 is controlled by the hydraulic cylinder multi-connection valve group 13. Preferably, the small crane 8 hoists the blowout preventer 12 from the blowout preventer platform 11 to the wellhead through the small crane hoisting rope 19 and the fixed pulley at the top of the derrick, so that the blowout preventer 12 is quickly and accurately positioned. In order to arrange the small crane hoisting rope 19 in a standard and neat manner, a guide wheel is preferably arranged at the top of the rear support of the derrick.

[0028] The working principle of the utility model is as follows:

[0029] 1. Equipment deployment and power switching

[0030] After the oil extraction vehicle drives to the well site, the full-power power take-off 5 is switched to the winch driving mode, and the power of the chassis engine is transmitted to the double-pump 3 through the full-power power take-off 5, and the double-pump 3 is started to supply energy to the first hydraulic system and the second hydraulic system respectively.

[0031] 2. Vehicle body support and derrick erection

[0032] The outrigger is unfolded: the hydraulic cylinder multi-connection valve group 13 controls the chassis front outrigger cylinder 4, the chassis rear outrigger cylinder 9 and the derrick rear support outrigger cylinder 10 to extend in sequence, so as to ensure the stability of the vehicle body;

[0033] The derrick is lifted: the lifting cylinder 14 controls the derrick 17 to be erected to the erected operation state.

[0034] 3. Blowout preventer installation and energy storage

[0035] Hoist the blowout preventer: use the small crane 8 to hoist the blowout preventer 12 from the blowout preventer platform 11 to the wellhead, and the small crane hoisting rope 19 is lifted vertically through the pulley group at the top of the derrick.

[0036] Energy storage: after the installation of the blowout preventer 12 is completed, the blowout preventer 12 is connected with the blowout preventer connecting pipeline 20 through the quick connector, the pressure relief valve 24 is in the non-pressure relief state, and the energy accumulator starts to store energy 15. Adjust the relief valve 22 to the set pressure, and the safety ball valve 23 monitors the overpressure state in real time.

[0037] 4. Oil extraction and wellhead sealing

[0038] Oil extraction: the winch 7 drives the oil extraction wire rope 18 to be lifted and lowered through forward and reverse rotation, and the oil extraction sucker brings the crude oil in the well to the wellhead; the handwheel chain of the rope arranger is operated to make the oil extraction wire rope 18 closely arranged on the main winch 7;

[0039] Dynamic sealing: the multi-connection valve 6 of the energy accumulator keeps the conduction state, and the high-pressure oil liquid in the energy accumulator 15 continuously provides pressure maintaining power for the blowout preventer 12, so that the wellhead is sealed.

[0040] 5. Emergency response mechanism

[0041] If the wellhead pressure is detected to be suddenly increased or a leakage occurs, the operator immediately triggers the accumulator multi-way valve 6, and the pressure stored in the accumulator 15 drives the blowout preventer 12 to be immediately closed through the hydraulic pipeline, thereby completing the emergency well sealing.

[0042] The above is a detailed introduction to the self-sealing well type gas well oil extraction vehicle provided by the present application. In this paper, specific examples are used to explain the technical principles and implementation methods of the present application. The above examples are only used to help understand the method and core idea of the present application. At the same time, for those skilled in the art, according to the idea of the present application, the specific implementation and application range will be changed. In view of the above, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A self-sealing well gas well truck, comprising a chassis, a sub-beam, a derrick and a hydraulic system, the sub-beam is sequentially provided with a derrick front support, an operating room, a winch, a lifting cylinder and a derrick rear support from front to rear, and the sub-beam is respectively provided with a chassis front leg cylinder and a chassis rear leg cylinder, characterized in that: The derrick rear support is provided with a blowout preventer platform, and the blowout preventer is installed on the blowout preventer platform; The hydraulic system is composed of a first hydraulic system and a second hydraulic system, and both of them are provided with hydraulic power by a double pump driven by a chassis side power takeoff; The first hydraulic system comprises a hydraulic cylinder multi-connection valve group, a chassis front support leg cylinder, a chassis rear support leg cylinder and a lifting cylinder, and the chassis front support leg cylinder, the chassis rear support leg cylinder and the lifting cylinder are controlled by the hydraulic cylinder multi-connection valve group; The second hydraulic system comprises a blowout preventer driving system and a blowout preventer, and the dynamic plugging of the wellhead of the well with pressure is realized by controlling the blowout preventer through the blowout preventer driving system.

2. A self-contained well shut-in gas well production vehicle as defined in claim 1, wherein: The blowout preventer driving system comprises an accumulator and an accumulator multi-connection valve, and the accumulator is arranged on the sub-beam between the operating room and the winch.

3. A self-contained well shut-in gas well production vehicle as defined in claim 1, wherein: The blowout preventer driving system further comprises a safety ball valve and a pressure relief valve.

4. A self-contained well shut-in gas well production vehicle as defined in claim 2 wherein: The hydraulic cylinder multi-connection valve group is arranged at the tail position of one side of the sub-beam, and the accumulator multi-connection valve is arranged at the middle position of one side of the sub-beam.

5. A self-contained well shut-in gas well pumping unit according to any one of claims 1 to 4, characterized in that: The tail of the sub-beam is provided with a hydraulic small crane for hoisting the blowout preventer to the wellhead, and the hydraulic small crane is controlled by the hydraulic cylinder multi-connection valve group.

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