Anti-spraying pipe feeder for perforation operation

Abstract

The invention relates to the field of petroleum shale gas development, in particular to a blowout prevention pipe feeder for perforation operation, which comprises a movable chassis, a cylindrical seat is arranged on the movable chassis, a limiting ejector rod capable of transversely moving is arranged on the side wall of the upper part of the cylindrical seat, and a via hole is formed in the bottom of the cylindrical seat. A movable pressing plate capable of moving up and down is correspondingly arranged below the via hole and connected with the limiting ejector rod through a transmission assembly. After the blowout prevention pipe enters the feeder, self-locking of the blowout prevention pipe is triggered through self-weight downward pressing of an instrument in the blowout prevention pipe, personnel assistance is not needed, and the safety of operators is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of oil shale gas development, and more particularly to a blowout preventer feeder for perforation operations. Background Technology

[0002] In bridge-jet combined perforation construction, after each layer of perforation is completed, the winch needs to lift the perforation equipment back into the blowout preventer (BOP) string and disconnect the BOP string from the wellhead. After disconnecting the BOP string from the wellhead, it needs to be moved to the wellhead position and laid flat. A BOP feeder is then used to fix it to the end of the BOP string. The operator manually rotates the external screw to move it inward and press it against the outer wall of the BOP, thus securing the feeder. This operation requires the operator to move to the bottom of the crane for manual operation. The BOP string is supported by equipment several meters high, suspended by a large crane, and directly above the operator. This poses a risk of collisions and impacts to the operator, as well as the safety hazard of falling objects. Summary of the Invention

[0003] In view of the above problems, the purpose of this invention is to provide a blowout preventer feeder for perforation operations. The invention adopts the following technical solution:

[0004] This invention provides a blowout preventer feeder for perforation operations, comprising a movable chassis, a cylindrical seat mounted on the movable chassis, a laterally movable limiting rod mounted on the upper side wall of the cylindrical seat, a through hole at the bottom of the cylindrical seat, and a vertically movable movable pressure plate corresponding to the through hole, the movable pressure plate being connected to the limiting rod via a transmission assembly.

[0005] Preferably, the mobile chassis includes a wheel frame, and rollers are installed at both ends of the wheel frame.

[0006] Preferably, the bottom of the movable pressure plate is provided with an elastic guide structure.

[0007] Preferably, the elastic guide structure includes a guide post fixed to the bottom of the movable pressure plate, the guide post being slidably inserted into a guide sleeve, the guide sleeve being fixed to the movable chassis, and a spring being sleeved on the outer side of the guide sleeve, the upper end of the spring abutting against the movable pressure plate and the lower end abutting against the movable chassis.

[0008] Preferably, the transmission assembly includes an upper rack, which is laterally disposed at the bottom of the limiting top rod. An upper gear meshes with the lower part of the upper rack, and the upper gear is mounted on an upper shaft. The upper shaft is connected to a lower shaft via a chain assembly. A lower gear is mounted on the lower shaft, and a vertically arranged lower rack meshes with one side of the lower gear. The lower rack is fixed to the movable pressure plate.

[0009] Preferably, a support rod is provided at the rear of the cylindrical seat.

[0010] Preferably, the side of the cylindrical seat is provided with a manual locking device for fixing the blowout preventer.

[0011] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0012] This invention utilizes the self-weight of the internal instruments of the blowout preventer to trigger a self-locking mechanism after the blowout preventer enters the feeder, eliminating the need for personnel assistance and ensuring the safety of operators. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings.

[0014] Figure 1 This is a front view of the blowout preventer feeder for perforation operations according to the present invention;

[0015] Figure 2 This is a schematic diagram of the blowout preventer structure;

[0016] Figure 3 This is a schematic diagram of the structure for hoisting the blowout preventer into the cylindrical base;

[0017] Figure 4 This is a schematic diagram of the internal instruments of the blowout preventer that press down the movable pressure plate.

[0018] Figure 5 This is a schematic diagram showing the blowout preventer in its unlocked state after being placed horizontally and connected to the feeder.

[0019] Figure 6 This is a side view of the blowout preventer feeder for perforation operations according to the present invention;

[0020] Figure 7 This is a schematic diagram of the elastic guiding structure of the present invention;

[0021] Figure 8 This is a schematic diagram of the transmission component of the present invention.

[0022] Explanation of reference numerals in the attached drawings: 1. Movable chassis; 101. Wheel frame; 102. Roller; 2. Cylindrical seat; 201. Through hole; 3. Limiting top rod; 4. Movable pressure plate; 5. Transmission assembly; 501. Upper rack; 502. Upper gear; 503. Upper shaft; 504. Chain assembly; 505. Lower shaft; 506. Lower gear; 507. Lower rack; 508. Outer frame; 6. Trumpet mouth; 7. Elastic guide structure; 701. Guide post; 702. Guide sleeve; 703. Spring; 8. Manual locking device; 9. Support rod; 10. Blowout preventer; 1001. Pipe body; 1002. Connector; 11. Instruments and equipment. Detailed Implementation

[0023] To make the technical problems, technical solutions, and beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0024] like Figure 1 As shown, this embodiment discloses a blowout preventer feeder for perforation operations, including a movable chassis 1, a cylindrical seat 2 on the movable chassis 1, a limiting rod 3 that can move laterally on the upper side wall of the cylindrical seat 2, the limiting rod 3 being inserted into the cylindrical seat 2 through a reserved hole on the upper side wall of the cylindrical seat 2, a through hole 201 at the bottom of the cylindrical seat 2, and a movable pressure plate 4 that can move up and down correspondingly below the through hole 201, the movable pressure plate 4 being connected to the limiting rod 3 through a transmission assembly 5.

[0025] like Figure 2 As shown, the blowout preventer 10 is a commonly used component in bridge-firing perforation construction. The structure of the blowout preventer 10 includes a tube body 1001 and an end connector 1002, the outer diameter of which is larger than the outer diameter of the tube body 1001. Inside the blowout preventer 10, several detection instruments 11 (also called an instrument string) are installed. These instruments 11 are mainly used for bridge plug setting, perforation ignition, and signal transmission. Those skilled in the art are familiar with blowout preventers and their internal instrument strings; blowout preventers and the instrument strings arranged inside them are existing technology.

[0026] like Figures 3 to 5 As shown, in use, the blowout preventer 10 and its internal instruments 11 are lifted by two lifting devices. One lifting device lifts the blowout preventer 10 and inserts its lower end into the cylindrical base 2. The instruments 11 inside the blowout preventer are then released and lowered by the other lifting device (a cable winch, with a cable connected to an instrument string; the winch controls the movement of the cable, thereby moving the instrument string). During descent, the instruments 11 pass through the through-hole 201 and automatically press against the movable pressure plate 4. The movable pressure plate 4 moves downwards under the pressure of the instruments 11, and through the transmission assembly 5, it drives the limiting rod 3 to insert into the cylindrical base 2, thus pressing and limiting the blowout preventer 10 inside the cylindrical base 2. The process can be summarized as: lifting - insertion - pressing down - locking.

[0027] It should be noted that the outer diameter of the connector 1002 of the blowout preventer 10 is slightly smaller than the inner diameter of the cylindrical seat 2, so that the lower end of the blowout preventer 10 will not wobble significantly after being inserted into the cylindrical seat 2. Furthermore, the contact point between the limiting rod 3 and the blowout preventer 10 is located above the connector 1002. This effectively limits the blowout preventer 10 using the step between the connector 1002 and the tube body 1001, allowing the hoisting equipment to lift the blowout preventer 10 and the feeder simultaneously. After the hoisting equipment lowers the blowout preventer 10, the instrument 11 is pulled outwards to disengage it from the movable pressure plate 4. The movable pressure plate 4 resets under the action of the elastic guide structure 7, and simultaneously, the movable pressure plate 4 drives the limiting rod 3 to reset via the transmission assembly 5. At this point, the feeder can be separated from the blowout preventer 10.

[0028] When the feeder is not in use, the outer end of its limiting rod 3 is exposed. After the lower end of the blowout preventer is inserted into the cylindrical seat 2, the movable pressure plate 4 drives the limiting rod 3 to be inserted into the cylindrical seat 2 through the transmission assembly 5. At this time, the outer end of the limiting rod 3 is hidden. In this way, the operator can further confirm that the limiting rod 3 of the feeder has pressed the blowout preventer by judging whether the outer end of the limiting rod 3 is exposed, which facilitates the next step of the operation.

[0029] In this embodiment, the upper port of the cylindrical seat 2 is provided with a flared mouth 6, which facilitates the insertion of the lower end of the blowout preventer into the cylindrical seat 2.

[0030] like Figure 6 As shown, the mobile chassis 1 includes a wheel frame 101, with rollers 102 mounted at both ends of the wheel frame 101. A manual locking device 8 is also provided on the side of the cylindrical base 2, which is used to secure the blowout preventer. The addition of the manual locking device 8 to the feeder allows for manual operation even in the event of a problem with the transmission assembly 5, without affecting on-site operations. In this embodiment, the manual locking device 8 is specifically a threaded rod, which is threadedly connected to the cylindrical base 2. Rotating the threaded rod allows its inner end to abut against the blowout preventer.

[0031] In this embodiment, an elastic guide structure 7 is provided at the bottom of the movable pressure plate 4. For example... Figure 7 As shown, specifically, the elastic guide structure 7 includes a guide post 701 fixed to the bottom of the movable pressure plate 4. The guide post 701 is slidably inserted into the guide sleeve 702, which is fixed to the movable base 1. A spring 703 is sleeved on the outer side of the guide sleeve 702. The upper end of the spring 703 abuts against the movable pressure plate 4, and the lower end abuts against the movable base 1.

[0032] like Figure 8As shown, the transmission assembly 5 includes an upper rack 501, which is horizontally arranged at the bottom of the limiting top rod 3. An upper gear 502 meshes with the lower part of the upper rack 501. The upper gear 502 is mounted on the upper shaft 503. The upper shaft 503 is rotatably connected to the bearing seat, which is mounted on the outer frame 508. The outer frame 508 is fixed to the rear of the cylindrical seat 2. The end of the upper shaft 503 away from the upper gear 502 is connected to the lower shaft 505 via a chain assembly 504. The lower shaft 505 is rotatably connected to the bearing seat, which is mounted on the outer frame 508. A lower gear 506 is mounted on the end of the lower shaft 505 away from the chain assembly 504. A vertically arranged lower rack 507 meshes with one side of the lower gear 506. The lower rack 507 is fixed to the movable pressure plate 4.

[0033] The chain assembly 504 mainly consists of two sprockets and a chain that meshes with the two sprockets. The two sprockets are respectively installed on the upper shaft 503 and the lower shaft 505.

[0034] In this embodiment, a support rod 9 is provided at the rear of the cylindrical base 2. When the feeder is placed vertically, the height of the support rod 9 is consistent with the height of the wheel, which allows the feeder to support the ground at three points, ensuring safety and stability.

[0035] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A blowout preventer feeder for perforation operations, characterized in that: The device includes a movable chassis (1), on which a cylindrical seat (2) is provided. A limiting rod (3) that can move laterally is provided on the upper side wall of the cylindrical seat (2). A through hole (201) is provided at the bottom of the cylindrical seat (2). A movable pressure plate (4) that can move up and down is provided below the through hole (201). The movable pressure plate (4) is connected to the limiting rod (3) through a transmission assembly (5).

2. The blowout preventer feeder for perforation operations according to claim 1, characterized in that: The upper port of the cylindrical seat (2) is provided with a flared mouth (6).

3. The blowout preventer feeder for perforation operations according to claim 1, characterized in that: The mobile chassis (1) includes a wheel frame (101), and rollers (102) are installed at both ends of the wheel frame (101).

4. The blowout preventer feeder for perforation operations according to claim 1, characterized in that: The bottom of the movable pressure plate (4) is provided with an elastic guide structure (7).

5. The blowout preventer feeder for perforation operations according to claim 4, characterized in that: The elastic guide structure (7) includes a guide post (701) fixed at the bottom of the movable pressure plate (4). The guide post (701) is slidably inserted into the guide sleeve (702). The guide sleeve (702) is fixed on the movable chassis (1). A spring (703) is sleeved on the outer side of the guide sleeve (702). The upper end of the spring (703) abuts against the movable pressure plate (4), and the lower end abuts against the movable chassis (1).

6. The blowout preventer feeder for perforation operations according to claim 1, characterized in that: The transmission assembly (5) includes an upper rack (501), which is horizontally arranged at the bottom of the limiting top rod (3). An upper gear (502) meshes with the lower part of the upper rack (501). The upper gear (502) is mounted on the upper shaft (503). The upper shaft (503) is connected to the lower shaft (505) via a chain assembly (504). A lower gear (506) is mounted on the lower shaft (505). A vertically arranged lower rack (507) meshes with one side of the lower gear (506). The lower rack (507) is fixed to the movable pressure plate (4).

7. The blowout preventer feeder for perforation operations according to claim 1, characterized in that: A support rod (9) is provided at the rear of the cylindrical seat (2).

8. The blowout preventer feeder for perforation operations according to claim 1, characterized in that: The side of the cylindrical seat (2) is provided with a manual locking device (8) for fixing the blowout preventer.

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