A fixing and connecting component for a blowout preventer side door

Abstract

The present invention relates to a fixing and connecting component for a blowout preventer side door, comprising: a housing, a side door, and a locking component, wherein the side door is fixedly connected to the housing via the locking component. The housing at the connection portion between the housing and the side door is configured as a waist-shaped hole, a portion of the side door is inserted into the housing, and a sleeve-type connection is provided between the side door and the housing; secondly, the connecting component is configured as a pin-type connection; thirdly, the insertion and removal of the pin shaft adopts a gearbox structure, which converts the rotational motion of the gear into the linear motion of the pin shaft, thereby increasing the reliability of the pin shaft's entry and exit; fourthly, the pin shaft hole is configured as a special shape, and grease is placed in the pin shaft hole on the side where the pin shaft does not exert force, thereby preventing the pin shaft from rusting. The present invention has the advantages of high efficiency, strong corrosion resistance, convenient disassembly, and good sealing effect.

Description

Technical Field

[0001] The invention relates to a method for fixing a blowout preventer side door and a shell, and also relates to a connecting component used for the fixation, belonging to the technical field of mechanical design and manufacturing. Background Art

[0002] Blowouts during oilfield production can have extremely serious consequences, resulting in not only crude oil waste but also environmental pollution, threats to personnel safety, and fires. These can be caused by: a) mud column pressure falling below the natural pressure of the oil and gas reservoir during drilling; b) mud loss from a lost zone; and c) excessive drilling speed when penetrating the oil and gas reservoir, causing a swabbing effect. To prevent blowouts, a blowout preventer (BOP) is installed at the wellhead. When a blowout occurs, the gate advances to lock the drill string in the wellbore, preventing the blowout. During normal operation, the gate retracts.

[0003] Traditional blowout preventer side doors and shells are connected end-to-end and secured with multiple bolts. This allows mud and debris to seep into the shell through the connection. Furthermore, the heavy mounting bolts, located high above the ground, make disassembly and replacement of internal components like the gate disc extremely difficult and often require multiple personnel, consuming significant manpower and significantly delaying work. Some systems use pins to connect the side door and shell, offering some improvement in disassembly and assembly. However, due to their irrational design, the pins and pin holes often rust and become blocked, making it impossible to remove the pins and replace the gate disc. Therefore, it is necessary to optimize the existing side door and shell connection methods and connecting components. Summary of the Invention

[0004] In view of the drawbacks pointed out in the background art, the present invention provides a fixing and connecting component for a blowout preventer side door, which facilitates folding and assembly and improves the sealing effect.

[0005] In order to achieve the above-mentioned object, the present invention adopts the following technical solution: a fixing and connecting member for a blowout preventer side door, comprising: a housing, a side door, and a locking member, wherein the side door is fixedly connected to the housing via the locking member, and is characterized in that:

[0006] The housing connected to the side door is provided with a waist-shaped hole, and a portion of the side door is inserted into the waist-shaped hole;

[0007] There are multiple locking components, each of which includes: a pin shaft, a pin shaft baffle, a front end cover plate and a gear box;

[0008] The pin is a round rod-shaped plug with a rack on one side, and the side door and the housing are provided with pin holes for inserting and removing the pin;

[0009] The gear box is fixed on the housing and has gears arranged therein;

[0010] The gear is meshed with the rack, and the rotation of the gear drives the pin shaft to insert into or exit from the pin shaft hole;

[0011] The gear is rotated to engage with the rack provided on the surface of the pin shaft, driving the pin shaft to insert into or withdraw from the pin shaft hole, thereby converting the rotational motion of the gear into the linear motion of the pin shaft;

[0012] The pin shaft hole is composed of two sections, the first section of the pin shaft hole and the second section of the pin shaft hole have the same shape and are connected;

[0013] The first section of the pin hole is provided on one side wall of the housing and passes through the side wall;

[0014] The second section of the pin hole is set at the junction of the side door and the shell, half of it is set on the side door, and the other half is set on the shell. The two half holes set on the side door and the shell are combined into one whole hole;

[0015] The arc curvature of the half pin hole on the side door and the half pin hole on the housing is smaller than that of the other side, the pin is locked on the side with smaller curvature, and a surplus space is provided on the side with larger curvature for placing grease;

[0016] The pin baffle is fixedly connected to the housing and fixed with one end of the pin by a screw;

[0017] The front end cover is connected to the pin shaft and is in close contact with the gear box, covering the redundant pin shaft hole.

[0018] In some embodiments, the shape of the pin shaft is the same as the shape of the pin shaft hole, and a groove for placing grease is provided on the outer side of the pin shaft along the axial direction.

[0019] In some embodiments, the shape of the pin shaft is the same as the shape of the pin shaft hole, and a groove for placing grease is provided on the inner surface of the pin shaft hole along the axial direction.

[0020] The present invention significantly improves the traditional connection method, component form, and connection process between the blowout preventer side door and the housing. First, the housing at the connection point between the housing and the side door is designed with a waist-shaped hole, allowing a portion of the side door to be inserted into the housing, replacing the original cross-sectional contact connection between the housing and the side door with a sleeve-type connection, thereby increasing the reliability of the connection. Second, the connecting components between the side door and the housing are improved, replacing the traditional bolt connection with a pin-type connection, reducing the operational intensity and difficulty. Third, the pin's entry and exit method is improved, replacing the traditional direct insertion with the meshing movement of a gear and rack, converting the gear's rotational motion into the pin's linear motion, thereby increasing the reliability of the pin's entry and exit. Fourth, the pin's hole is designed with a special shape, and grease is placed in the pin hole on the side where the pin does not exert force, preventing the pin from rusting. The present invention has the advantages of high efficiency, strong corrosion resistance, convenient disassembly, and good sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Attachment Figure 1 It is a schematic diagram of the main view and partial cross-sectional structure of the present invention;

[0022] Attachment Figure 2 For attachment Figure 1 Schematic diagram of the cross-sectional structure of the AA section;

[0023] Attachment Figure 3 For attachment Figure 2 The structure of part I in the middle is removed from the enlarged view.

[0024] In the accompanying drawings, 1 is a side door, 2 is a pin shaft, 201 is a rack, 3 is a housing, 4 is a gear box, 401 is a gear, 5 is a pin shaft baffle, and 6 is a front end cover. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] Attachment Figure 1The figure shows a double-gate blowout preventer with an insertable side door 1. Specifically, a waist-shaped hole is provided at the connection between the housing 3 and the side door 1. The side door is inserted into the housing 3 through the waist-shaped hole, changing the traditional end-face connection method between the housing 3 and the side door 1, making the connection more reliable. The side door 1, inserted into the housing 3, has a pin hole section at the connection point. Half of the hole is located in the housing 3, and the other half is located in the side door 1. These two sections together form a pin hole. The other section of the pin hole is located in a side wall of the housing 3, penetrates the side wall, and connects with the pin hole section at the connection point between the housing 3 and the side door 1, forming a complete pin hole. The pin 2 can be inserted and removed from this pin hole. The pin 2 is subjected to different forces in the pin hole. The side door 1 presses one side of the pin 2 toward the outside of the housing 3, while the housing 3 presses the other side of the pin 2 toward the inside of the housing 3. Because there is excess space in the pin hole on the side where the pin 2 is not pressed, it provides space for storing pin grease. A gear box 4 is provided outside the housing 3 , and the gear 401 rotates to drive the rack 201 to move linearly. The gear 401 rotates forward and reversely to drive the pin shaft 2 to insert into and pull out of the pin shaft hole through the rack 201 .

[0027] Attachment Figure 2 As shown, the pin baffle 5 is fixedly connected to the housing 3 and is fixedly connected to one end of the pin 2 by screws. The pin 2 cannot be separated by itself after being inserted. The front cover 6 is connected to the pin 2 and is close to the gear box 4, covering the extra pin hole.

[0028] In some embodiments, a groove for placing grease is provided on the outer side of the pin shaft 2 along the axial direction.

[0029] In some embodiments, a groove for placing grease is provided on the inner surface of the pin shaft hole along the axial direction.

Claims

1. A fixing and connecting member for a blowout preventer side door, comprising: A housing, a side door, and a locking member, wherein the side door and the housing are fixedly connected via the locking member, and is characterized in that: The housing connected to the side door is provided with a waist-shaped hole, and a portion of the side door is inserted into the waist-shaped hole; There are multiple locking components, each of which includes: a pin shaft, a pin shaft baffle, a front end cover plate and a gear box; The pin is a round rod-shaped plug with a rack on one side, and the side door and the housing are provided with pin holes for inserting and removing the pin; The gear box is fixed on the housing and has gears arranged therein; The gear is meshed with the rack, and the rotation of the gear drives the pin shaft to insert into or exit from the pin shaft hole; The gear is rotated to engage with the rack provided on the surface of the pin shaft, driving the pin shaft to insert into or withdraw from the pin shaft hole, thereby converting the rotational motion of the gear into the linear motion of the pin shaft; The pin shaft hole is composed of two sections, the first section of the pin shaft hole and the second section of the pin shaft hole have the same shape and are connected; The first section of the pin hole is provided on one side wall of the housing and passes through the side wall; The second section of the pin hole is set at the junction of the side door and the shell, half of it is set on the side door, and the other half is set on the shell. The two half holes set on the side door and the shell are combined into one whole hole; The arc curvature of the half pin hole on the side door and the half pin hole on the housing is smaller than that of the other side, the pin is locked on the side with smaller curvature, and a surplus space is provided on the side with larger curvature for placing grease; The pin baffle is fixedly connected to the housing and fixed with one end of the pin by a screw; The front end cover is connected to the pin shaft and is in close contact with the gear box, covering the redundant pin shaft hole.

2. A fixing and connecting member for a blowout preventer side door according to claim 1, characterized in that: The shape of the pin shaft is the same as that of the pin shaft hole, and a groove for placing grease is provided on the outer side of the pin shaft along the axial direction.

3. The fixing and connecting member for the side door of a blowout preventer according to claim 1, characterized in that: The shape of the pin shaft is the same as that of the pin shaft hole, and a groove for placing grease is provided on the inner surface of the pin shaft hole along the axial direction.

Images