Vertical limiting type hydraulic locking ram blowout preventer

Abstract

The utility model discloses a vertical limiting type hydraulic locking ram blowout preventer, which relates to the technical field of ram blowout preventer devices and comprises a shell, a ram assembly, a hydraulic cylinder assembly and a locking assembly. The flashboard assembly is arranged in the shell, and the hydraulic cylinder assemblies are arranged on the two sides of the shell respectively. The flashboard assembly is connected with the hydraulic cylinder assembly; the locking assembly is arranged on the side, away from the shell, of the hydraulic cylinder assembly. In the utility model, the shell is used as a shaft bottom pressure bearing unit, the flashboard cavity capable of installing the flashboard assembly is arranged in the shell, and the flashboard assembly is arranged in the flashboard cavity of the shell, so that the purpose of adjusting the shaft bottom pressure is realized. The flashboard assembly is connected with the main operation hydraulic cylinder, and the main operation hydraulic cylinder is controlled by the pressure source to achieve linear motion of the flashboard assembly in the flashboard cavity. The hydraulic locking hydraulic cylinder is arranged at the tail of the main operation hydraulic cylinder, the locking block is arranged in the hydraulic locking hydraulic cylinder, and the locking block locks and unlocks the main operation hydraulic cylinder through adjustment of the pressure source.

Description

Technical Field

[0001] The utility model relates to the technical field of gate blowout preventer devices, in particular to a vertical limit type hydraulic locking gate blowout preventer. Background Art

[0002] With the popularization and application of large-caliber high-pressure ram BOPs in some special working conditions, the functional requirements for the safety and operability of large-caliber high-pressure ram BOPs are getting higher and higher. At the same time, large-caliber high-pressure ram BOPs are mostly used on offshore platforms, which have limited installation and operation space and high requirements for operating efficiency.

[0003] In the process of shutting down the well to deal with the bottom hole pressure, a manual single-gate blowout preventer is disclosed in the patent with publication number CN108487875A, wherein an oil through hole is provided in the inner cavity of the shell, a side box is installed on the right side of the shell, a blowout preventer movable box is installed in the inner cavity of the side box, a blowout preventer movable rod is installed transversely in the inner cavity of the blowout preventer movable box, a movable shaft is fixedly installed in the middle of the blowout preventer movable rod, a gate is fixedly installed on the left end of the blowout preventer movable rod, a through hole matching the gate is provided on the left side of the blowout preventer movable box, a rotating shaft is installed at the bottom of the shell, a rotating handle is installed at the bottom of the rotating shaft, and the rotating handle is rotated forward and reversely to control the movable rod to move left and right, which can not only close the oil through hole, but also open it, and can be freely controlled. The present invention has a simple structure, saves time and effort, and can freely control opening and closing, and is no longer limited to closing.

[0004] The gate assembly needs to be in a long-term shut-in state. At this time, a manual locking device is often used to lock the gate assembly in a closed state. The manual locking device requires a locking handwheel that is several meters long. When locking a large-diameter, high-pressure gate blowout preventer, the required locking torque value is high and manual on-site operation is required. After completing the control of the bottom hole pressure, the gate blowout preventer needs to be manually unlocked. Therefore, the implementation of the blowout preventer operation process is very cumbersome and inefficient. When operating on an offshore platform, due to its limited space, it is impossible to install a longer locking handwheel, which causes great trouble to on-site operations and needs to be solved urgently. Summary of the invention

[0005] In order to solve the above technical problems, the utility model provides a vertical limit type hydraulic locking gate blowout preventer, which can realize hydraulic locking and hydraulic unlocking of the gate blowout preventer on site, improve work efficiency, avoid safety hazards, and better adapt to the installation space on site.

[0006] To achieve the above purpose, the utility model provides the following solutions:

[0007] The utility model provides a vertical limited hydraulic locking gate blowout preventer, comprising a shell, a gate assembly, a cylinder assembly and a locking assembly; the gate assembly is arranged inside the shell, and a cylinder assembly is respectively arranged on both sides of the shell; the gate assembly is connected to the cylinder assembly on the corresponding side; the locking assembly is arranged on a side of the cylinder assembly away from the shell.

[0008] Optionally, the cylinder assembly includes an intermediate flange, a large cylinder liner, a piston shaft, a cylinder head, an opening piston rod and a closing piston rod; one end of the intermediate flange is connected to the housing; the other end of the intermediate flange is connected to one end of the large cylinder liner, and the other end of the large cylinder liner is connected to the cylinder head; the piston shaft passes through the intermediate flange, the large cylinder liner and the cylinder head; one end of the piston shaft is connected to the gate assembly, and the other end of the piston shaft extends into the locking assembly; the locking assembly is connected to the cylinder head; the opening piston rod and the closing piston rod both pass through the intermediate flange and the large cylinder liner.

[0009] Optionally, a connecting rod is provided at one end of the piston shaft, one end of the connecting rod is connected to the piston shaft, and the other end of the connecting rod is connected to the gate assembly.

[0010] Optionally, the locking assembly includes a locking cylinder, an unlocking cover plate, a locking cover plate and a locking block; the middle part of the locking cylinder is connected to the cylinder assembly, and the angle between the axis of the locking cylinder and the axis of the cylinder assembly is a first angle, and the piston shaft in the cylinder assembly extends into the locking cylinder; the unlocking cover plate is provided at one end of the locking cylinder, and the locking cover plate is provided at the other end of the locking cylinder; the locking block is provided in the locking cylinder, the locking block bevel of the locking block matches the end of the piston shaft, and the angle between the locking block bevel and the locking block is the same as the first angle.

[0011] Optionally, the locking assembly further includes a positioning rod, one end of which is connected to the locking cover plate, and the other end of which is slidably extended into the locking block.

[0012] Optionally, an inner hole is provided at one end of the locking block, and the positioning rod extends into the inner hole.

[0013] Optionally, a through hole is provided at one end of the locking block close to the unlocking cover plate, and the through hole is used to allow the piston shaft to pass through the locking block.

[0014] Optionally, an unlocking hydraulic interface is provided on the unlocking cover plate; and a locking hydraulic interface is provided on the locking cover plate.

[0015] Compared with the prior art, the utility model has achieved the following technical effects:

[0016] The vertical limit hydraulic locking gate blowout preventer in the utility model has a shell as a bottom hole pressure bearing unit, and a gate cavity is provided inside to install the gate assembly. The gate assembly is installed in the shell gate cavity, so as to achieve the purpose of adjusting the bottom hole pressure. The gate assembly is connected to the main operating hydraulic cylinder, and the main operating hydraulic cylinder realizes the linear movement of the gate assembly in the gate cavity through the control of the pressure source. The hydraulic locking hydraulic cylinder is arranged at the tail of the main operating hydraulic cylinder, and a locking block is arranged inside the hydraulic locking hydraulic cylinder. The locking and unlocking of the main operating hydraulic cylinder by the locking block is realized through the adjustment of the pressure source. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a three-dimensional axonometric drawing of the assembly of the present invention.

[0019] Figure 2 It is a central cross-sectional view of the main operating cylinder in the cylinder assembly of the present invention in the open state and the hydraulic locking cylinder in the unlocked state.

[0020] Figure 3 It is a central cross-sectional view of the main operating hydraulic cylinder in the hydraulic cylinder assembly of the present invention in the closed state and the hydraulic locking cylinder in the locked state.

[0021] Figure 4 It is a central cross-sectional view of the opening piston rod and the closing piston rod of the present invention.

[0022] In the figure:

[0023] 101, housing; 102, side door bolts; 103, hydraulic cylinder assembly; 104, housing hydraulic interface; 105, gate assembly;

[0024] 201, middle flange; 202, large cylinder sleeve; 203, piston shaft; 204, cylinder head; 205, locking cylinder; 206, unlocking cover plate; 207, bolt; 208, locking block; 209, clearance hole; 210, positioning rod; 211, locking cover plate; 212, cylinder head bolt; 213, closing chamber; 214, opening chamber; 215, opening piston rod; 216, connecting rod; 217, closing piston rod; 218, unlocking hydraulic interface; 219, locking hydraulic interface;

[0025] 301, locking block inclined surface;

[0026] 401. Small cylinder liner. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] like Figures 1 to 4 As shown, this embodiment provides a vertical limit type hydraulic locking gate blowout preventer, the housing 101 and the hydraulic control assembly 103 are connected through the side door bolts 102, and the gate assembly 105 is installed inside the housing 101 and connected to the piston shaft 203. The hydraulic interface 104 and its relative position hydraulic interface control the piston shaft 203 and the gate assembly 105 to move axially along the inner hole of the housing to realize the function of opening and closing the gate blowout preventer.

[0029] like Figure 2 As shown, the hydraulic cylinder assembly includes an intermediate flange 201, a cylinder head 204 and a large cylinder sleeve 202. The cylinder head 204 and the intermediate flange 201 are fixed together with the large cylinder sleeve 202 by bolts 212. The intermediate flange 201 has a center hole. The piston shaft 203 moves axially along the center hole of the intermediate flange 201 under the action of the hydraulic source, and drives the gate 105 to move synchronously to realize the opening and closing action of the gate blowout preventer. A connecting rod 216 is provided at the front end of the piston shaft 203 for connecting with the gate assembly 105.

[0030] The cylinder cover 204 and the locking cylinder 205 are fixedly connected by welding or other connection methods. The central axis of the locking cylinder 205 forms a fixed angle with the flat end surface of the cylinder cover 204. The locking block 208 is installed inside the locking cylinder 205. Similarly, a locking block inclined surface 301 is processed on the locking block 208. The angle of the locking block inclined surface 301 is the same as the fixed angle formed by the central axis of the locking cylinder 205 and the flat end surface of the cylinder cover 204, but the direction is opposite. It can ensure that the locking inclined surface and the piston axis are attached and locked, and the two are in a vertical state.

[0031] The locking block 208 is designed with a clearance hole 209 so that the end of the piston shaft 203 can pass through.

[0032] The locking cylinder 205 is provided with an unlocking cover plate 206 and a locking cover plate 211 at both ends; the unlocking cover plate 206 and the locking cover plate 211 are connected to the locking cylinder 205 through bolts 207. An unlocking hydraulic interface 218 is provided on the unlocking cover plate 206, and a locking hydraulic interface 219 is provided on the locking cover plate 211. The hydraulic source used here and the hydraulic source driven by the piston shaft of the main operating cylinder are two relatively independent systems.

[0033] A positioning rod 210 is provided on the locking cover plate 211. The positioning rod 210 is located at a position off-center of the locking cylinder 205. The positioning rod 210 is connected to the inner hole of the locking block 208 to ensure that the direction of the locking inclined surface 301 of the locking block 208 in the locking cylinder 205 will not change.

[0034] When the gate blowout preventer needs to be closed, oil is introduced into the hydraulic oil port connected to the closing piston rod 215, and the hydraulic oil enters the closing chamber 213 of the main hydraulic cylinder 202 through the channel inside the cylinder cover 204, pushing the piston shaft 203 and driving the gate assembly 105 to move toward the center of the wellhead. When the gate assembly is completely closed and needs to be locked, the hydraulic source connected to the locking cover plate 211 works to push the locking block 208 to move until the locking slope 301 is tightly attached to the tail of the piston shaft, forming a locked state. At this time, all hydraulic sources can be released, and the gate blowout preventer can be kept in a closed state only by the locking block.

[0035] When the gate blowout preventer needs to be opened, firstly, the hydraulic interface 218 on the unlocking cover plate 206 is connected to the hydraulic source, and the hydraulic oil pushes the locking block 208 to move until the locking block 208 is completely fitted with the locking cover plate 211, and the clearance hole 209 is coaxial with the piston shaft. Then, the hydraulic oil port connected to the opening piston rod 217 is fed with oil, and the hydraulic oil passes through the annulus formed by the opening piston rod 217 and the small cylinder sleeve 401, returns to the middle flange 201, and enters the opening chamber 214 of the main hydraulic cylinder 202 through the channel inside the middle flange 201, pushing the piston shaft 203 and driving the gate assembly 501 to move away from the center of the wellhead until the gate assembly is fully opened.

[0036] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

[0037] This specification uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core idea of ​​the utility model. At the same time, for those skilled in the art, according to the idea of ​​the utility model, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the utility model.

Claims

1. A vertical limit type hydraulic locking gate blowout preventer, characterized in that: It comprises a housing, a gate assembly, a cylinder assembly and a locking assembly; the gate assembly is arranged inside the housing, and one cylinder assembly is arranged on each side of the housing; the gate assembly is connected to the cylinder assembly on the corresponding side; the locking assembly is arranged on the side of the cylinder assembly away from the housing; The locking assembly includes a locking cylinder, an unlocking cover plate, a locking cover plate and a locking block; the middle part of the locking cylinder is connected to the cylinder assembly, and the angle between the axis of the locking cylinder and the axis of the cylinder assembly is a first angle, and the piston shaft in the cylinder assembly extends into the locking cylinder; the unlocking cover plate is provided at one end of the locking cylinder, and the locking cover plate is provided at the other end of the locking cylinder; the locking block is provided in the locking cylinder, the locking block inclined surface of the locking block matches the end of the piston shaft, and the angle between the locking block inclined surface and the locking block is the same as the first angle.

2. The vertical limit type hydraulic locking gate blowout preventer according to claim 1 is characterized in that: The cylinder assembly includes an intermediate flange, a large cylinder liner, a piston shaft, a cylinder cover, an opening piston rod and a closing piston rod; one end of the intermediate flange is connected to the housing; the other end of the intermediate flange is connected to one end of the large cylinder liner, and the other end of the large cylinder liner is connected to the cylinder cover; the piston shaft passes through the intermediate flange, the large cylinder liner and the cylinder cover; one end of the piston shaft is connected to the gate assembly, and the other end of the piston shaft extends into the locking assembly; the locking assembly is connected to the cylinder cover; the opening piston rod and the closing piston rod both pass through the intermediate flange and the large cylinder liner.

3. The vertical limit type hydraulic locking gate blowout preventer according to claim 2 is characterized in that: A connecting rod is provided at one end of the piston shaft, one end of the connecting rod is connected to the piston shaft, and the other end of the connecting rod is connected to the gate assembly.

4. The vertical limit type hydraulic locking gate blowout preventer according to claim 1 is characterized in that: The locking assembly also includes a positioning rod, one end of which is connected to the locking cover plate, and the other end of which is slidably extended into the locking block.

5. The vertical limit type hydraulic locking gate blowout preventer according to claim 4 is characterized in that: An inner hole is arranged at one end of the locking block, and the positioning rod extends into the inner hole.

6. The vertical limit type hydraulic locking gate blowout preventer according to claim 1 is characterized in that: A through hole is provided at one end of the locking block close to the unlocking cover plate, and the through hole is used for the piston shaft to pass through the locking block.

7. The vertical limit type hydraulic locking gate blowout preventer according to claim 1 is characterized in that: The unlocking cover plate is provided with an unlocking hydraulic interface; the locking cover plate is provided with a locking hydraulic interface.

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