A plug valve for blowout prevention

Abstract

The utility model relates to a plug valve for blowout prevention, belong to petroleum industry drilling, well repairing technical field, including plug valve body and the ball valve switch of setting in the middle part of plug valve body, the outside wall of plug valve body is equipped with the clamping body, the clamping body sets up the top of ball valve switch to make the operator hand -held clamping body installs plug valve in the well mouth. The utility model discloses the clamping body on the outside wall of plug valve body sets up, the clamping body sets up the top of ball valve switch, namely, close to the upper part of plug valve body sets up, to make the operator hand -held clamping body installs plug valve in the well mouth, the installation of plug valve is convenient, avoids the smooth surface of the outside wall of plug valve body and makes the operator hand -held when easy to slip and causes the safety accident, provides the clear hand -held force point for plug valve, improves plug valve installation efficiency and solves the corresponding security risk simultaneously.

Description

Technical Field

[0001] This utility model relates to a blowout preventer plug valve, belonging to the field of drilling and well workover technology in the petroleum industry. Background Technology

[0002] When a well kick or blowout occurs during downhole operations, the blowout preventer at the wellhead is used to control the annular space of the casing, while the inner cavity of the tubing string inside the well needs to be controlled by a plug valve.

[0003] The current method for installing plug valves involves the operator lifting the valve with both hands, aligning it with the wellhead tubing, and then tightening it with pipe wrenches. However, this method has several problems: First, the plug valve is a smooth cylinder and quite heavy. Manually lifting it for installation at the wellhead is unstable and prone to slipping, making installation inconvenient and posing a safety hazard. Second, during the alignment process, the valve's back-and-forth movement makes it difficult to align the lower connector threads with the wellhead tubing. This is especially problematic when there is significant wellhead overflow, slowing down installation and potentially causing installation failure, thus delaying the optimal time for blowout control and leading to uncontrolled blowouts. Third, the frequent connection and disconnection of the lower threads of the plug valve with the wellhead tubing on-site often damages these threads, rendering the entire plug valve unusable and increasing operating costs. Utility Model Content

[0004] The purpose of this invention is to provide a stopcock valve for blowout prevention, which solves the problem of inconvenient installation of existing stopcock valves.

[0005] To achieve the above objectives, the solution of this utility model includes: This utility model discloses a plug valve for blowout prevention, including a plug valve body and a ball valve switch disposed in the middle of the plug valve body. A clamping body is provided on the outer side wall of the plug valve body, and the clamping body is disposed above the ball valve switch so that the operator can hold the clamping body to install the plug valve at the wellhead.

[0006] This invention features a clamping body on the outer wall of the plug valve body, positioned above the ball valve switch, near the upper part of the plug valve body. This allows the operator to hold the clamping body and install the plug valve at the wellhead, facilitating installation and preventing accidents caused by the smooth surface of the outer wall of the plug valve body causing it to slip from the operator's hand. It also provides a clear point of leverage for the plug valve, improving installation efficiency while addressing potential safety hazards.

[0007] Furthermore, the clamping body includes a handle that is directly or indirectly disposed on the outer wall of the plug valve body.

[0008] This invention features a handle, either directly or indirectly mounted on the outer wall of the plug valve body, allowing the operator to hold the handle and install the plug valve at the wellhead, thus facilitating installation. Alternatively, the handle can be fixed to the outer wall of the plug valve body by welding or other methods.

[0009] Furthermore, the clamping body also includes several segmented clamping blocks, which are held tightly against the valve body. Adjacent segmented clamping blocks are connected by connectors, and the handle is indirectly set on the outer side wall of the valve body through the segmented clamping blocks.

[0010] The clamping body of this utility model also includes several segmented clamping blocks, which are held tightly on the plug valve body. Adjacent segmented clamping blocks are connected by connectors. The handle is indirectly set on the outer side wall of the plug valve body through the segmented clamping blocks, so that the operator can hold the handle and install the plug valve at the wellhead through the segmented clamping blocks, which facilitates the installation of the plug valve.

[0011] Furthermore, there are two segmented clamping blocks, each with a handle for the operator to hold.

[0012] This utility model uses a clamping body consisting of two segmented clamping blocks and two handles, which facilitates the replacement of the clamping body; the handles can be fixedly set on the corresponding segmented clamping blocks by welding or other methods.

[0013] Furthermore, both ends of the segmented clamping block are connecting ends, and mounting holes are provided on the connecting ends; the connecting parts are bolts and nuts, with the bolts passing through the mounting holes of the two connected segmented clamping blocks so that the segmented clamping blocks can grip the plug valve body tightly after the bolts and nuts are screwed together.

[0014] The adjacent segmented clamping blocks of this utility model are screwed together by bolts and nuts so that the segmented clamping blocks hold the plug valve body tightly, making it easy for the operator to safely lift and install the plug valve.

[0015] Furthermore, a fixing groove is provided on the outer side wall of the plug valve body, and the inner arc surface of the split clamping block fits against the bottom of the fixing groove so that the split clamping block is stuck in the fixing groove.

[0016] This invention creates a fixing groove on the outer wall of the plug valve body and makes the inner arc surface of the split clamping block fit against the bottom of the fixing groove, so that the split clamping block is stuck in the fixing groove, which makes it easy for the operator to safely lift and install the plug valve, improves the tightness of the connection between the split clamping block and the outer wall of the plug valve body, and makes the split clamping block reliably fixed on the outer wall of the plug valve body.

[0017] Furthermore, a guide body is fitted on the outer circumference of the lower connector of the plug valve body for docking with the wellhead tubing coupling. The lower end of the guide body is chamfered so that the lower end face of the guide body forms an inner inverted cone surface for guiding the docking of the wellhead tubing coupling; the inner inverted cone surface is lower than the lower connector.

[0018] This invention features a guide body fitted onto the outer circumference of the lower connector of the plug valve body, which is used to connect to the wellhead tubing coupling. The guide body's inner conical surface guides the upper part of the wellhead tubing coupling smoothly between the guide body and the outer circumference of the lower connector. This prevents the plug valve (plug valve body) from swinging back and forth during installation, which could make it difficult to align the threads of the lower connector (lower part of the plug valve body) with the wellhead tubing. When the plug valve is installed on the wellhead tubing, the lower end face of the guide body contacts the tubing first, and under the guidance of the inner conical surface, the upper part of the wellhead tubing coupling smoothly inserts between the guide body and the outer circumference of the lower connector. This improves the installation speed of the plug valve and avoids failed installations that could delay the optimal time for emergency blowout, leading to uncontrolled blowout accidents.

[0019] Furthermore, the guide body includes an installation component and an elastic centralizing sleeve disposed on the lower end face of the installation component for engaging with the outer circle of the wellhead tubing coupling. The installation component is fitted onto the outer circumferential surface of the lower connector so that the inner circumferential surface of the elastic centralizing sleeve surrounds the lower connector. Several axially evenly distributed segmented grooves are provided on the side wall of the elastic centralizing sleeve so that the segmented grooves evenly divide the elastic centralizing sleeve. The lower end face of the elastic centralizing sleeve is chamfered.

[0020] The guide body of this utility model includes an mounting component sleeved on the outer circumferential surface of the lower connector and an elastic straightening sleeve (straightening sleeve) disposed on the lower end face of the mounting component for mating with the outer circle of the wellhead tubing coupling. The mounting component is sleeved on the outer circumferential surface of the lower connector, so that the inner circumferential surface of the straightening sleeve surrounds the lower connector. Several evenly distributed axially spaced slots are formed on the side wall of the straightening sleeve to evenly divide it, thereby achieving rapid straightening and engagement between the lower connector of the plug valve and the wellhead tubing, improving the efficiency of plug valve installation and effectively preventing blowout accidents. The elastic straightening sleeve, through its own elasticity, achieves an elastic straightening effect when the lower connector of the plug valve is engaged with the wellhead tubing; the chamfered inner end face of the elastic straightening sleeve further improves the installation speed of the plug valve.

[0021] Furthermore, there are four segmented grooves.

[0022] The elastic straightening sleeve of this utility model has four segmented grooves on its side wall. The elastic straightening sleeve with four segmented grooves can achieve the elastic straightening effect when the lower connector of the plug valve is engaged with the wellhead tubing through its own elasticity, thereby realizing the rapid straightening and engagement of the lower connector of the plug valve with the wellhead tubing and improving the installation efficiency of the plug valve.

[0023] Furthermore, the lower part of the plug valve body is detachably connected to the upper end of a protective connector, the lower end of which is used to mate with the wellhead tubing coupling; the lower end of the protective connector serves as a lower connector for mate with the wellhead tubing coupling; two flat squares for clamping pipe wrenches are symmetrically provided on the outer circumference of the upper end of the protective connector, so that when the pipe wrench used to install the plug valve is tightened, the pipe wrench is clamped at the flat squares.

[0024] This invention features a plug valve body with a detachable protective connector at its upper end. The plug valve body is connected to the wellhead tubing coupling via the protective connector (butt joint). This effectively prevents wear and tear on the connection point between the plug valve body and the wellhead tubing caused by frequent connection and disassembly, thus avoiding increased downhole operating costs. The protective connector protects the lower part of the plug valve body, preventing damage or wear during connection and disassembly that could render the plug valve unusable. This invention reduces unnecessary downhole operating costs by replacing damaged protective connectors. Furthermore, the protective connector has two symmetrical flat squares on its outer circumference for clamping pipe wrenches. When the pipe wrench is used to install the plug valve, it is secured at these flat squares, facilitating the installation and disassembly of the protective connector. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the plug valve of this utility model; Figure 2 This is the utility model Figure 1 Top view; Figure 3 This is the utility model Figure 1 AA cross-section view.

[0026] Explanation of reference numerals in the attached figures: 1. Plug valve body; 101. Plug valve upper connector; 102. Plug valve lower connector (lower part of plug valve body); 103. Ball valve and switch; 104. Fixing groove; 2. Clamping body; 201. Handle; 202. Split clamping block; 203. Bolt and nut; 3. Protective connector; 301. Flat square; 302. Protective connector upper connector; 303. Protective connector lower connector; 4. Centralizing body (guide body); 401. Centralizing sleeve (elastic centralizing sleeve); 402. Split groove; 403. Inner inverted conical surface. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0028] An embodiment of a blowout preventer plug valve: The existing plug valve is a smooth cylinder and is quite heavy. When manually picking up the plug valve by hand for installation at the wellhead, it is slippery and unstable, and is easy to slip off, making installation inconvenient and posing a safety hazard.

[0029] To address the aforementioned issues, a plug valve for blowout prevention is provided, specifically comprising: a plug valve body and a ball valve switch disposed in the middle of the plug valve body; a clamping body is installed on the outer wall of the plug valve body, and the clamping body is disposed above the ball valve switch, so that the operator can hold the clamping body to install the plug valve at the wellhead.

[0030] By setting a clamping body on the outer wall of the plug valve body, a hand-holding force point is provided for the plug valve, so that when the operator picks up the plug valve, the hand-holding force position is clear and does not slip.

[0031] Specifically, the clamping body includes a handle that is directly or indirectly disposed on the outer side wall of the plug valve body. The handle can be any shape that can be gripped by hand, providing a gripping position for the operator; the handle can be installed on the outer side wall of the plug valve body by direct welding or screwing, etc., according to actual needs.

[0032] Specifically, the clamping body further includes several segmented clamping blocks, which are tightly gripped on the valve body. Adjacent segmented clamping blocks are connected by connectors, and the handle is indirectly mounted on the outer wall of the valve body via the segmented clamping blocks. The number of segmented clamping blocks can vary, ranging from one, two, three, to four, but two is preferred. The number of handles corresponds to the number of segmented clamping blocks, but ideally it should correspond to the number of segmented clamping blocks. Adjacent segmented clamping blocks can also be fixedly connected by welding or other methods. When welding is used, the connector is a welding material used to connect two segmented clamping blocks.

[0033] Specifically, such as Figures 1 to 3 As shown, this utility model mainly consists of a plug valve body 1, a clamping body 2, a protective connector 3, and a straightening body 4.

[0034] The upper part of the plug valve body 1 has a fixing groove 104. The two split clamping blocks 202 of the clamping body 2 are clamped in the fixing groove 104 and secured by two sets of bolts and nuts 203. The two handles 201 are respectively fixed on the middle two sides of the split clamping blocks 202. The lower connector (plug valve lower connector 102) at the lower part of the plug valve body 1 is connected to a protective connector 3. A straightener 4 is installed on the outer circumference of the protective connector 3.

[0035] The plug valve body 1 consists of an upper connector (plug valve upper connector 101), a lower connector (plug valve lower connector 102), a ball valve and switch 103 in the middle, and a fixing groove 104 between the upper connector (plug valve upper connector 101) and the ball valve and switch 103.

[0036] The clamping body 2 consists of a handle 201, a split clamping block 202, and bolts and nuts 203. The split body is formed by two split clamping blocks 202 enclosing each other. The interior of the split clamping block 202 is arc-shaped, and the inner arc matches the outer arc of the fixing groove 104 of the plug valve body 1. There are transverse bolt holes at both ends of the two split clamping blocks 202, which cooperate with two sets of bolts and nuts 203 to fasten the two split clamping blocks 202 in the fixing groove 104 of the plug valve body 1. A cylindrical handle 201 is horizontally installed in the middle of the outer side of the two split clamping blocks 202, which facilitates manual, safe and quick lifting of this utility model and realizes rapid rotation and locking operations.

[0037] The protective connector 3 consists of a flat square 301, an upper protective connector 302, and a lower protective connector 303. The upper protective connector 302 has an internal thread that connects to the external thread of the lower connector 102 of the plug valve. The outer circumference of the upper protective connector 302 (the upper end of the protective connector) has symmetrical flat squares 301, which are used to clamp the pipe wrench when installing the plug valve. The lower protective connector 303 (the lower end of the protective connector) has an external thread that connects to the wellhead tubing coupling.

[0038] The centralizing body 4 includes an mounting component and an elastic centralizing sleeve (centralizing sleeve 401). The mounting component is threaded onto the outer circumference of the protective connector 3. The centralizing sleeve 401 at the lower part of the mounting component mates with the outer circumference of the wellhead connecting pipe coupling. The centralizing sleeve 401 is evenly divided axially by a segmented groove 402 to ensure elastic centralizing, achieving the centralizing effect when the lower connector 303 of the protective connector is engaged with the wellhead connecting pipe coupling. In addition, the lower connector 303 of the protective connector is located inside the centralizing sleeve 401, which can protect the threads of the lower connector 303 of the protective connector, preventing damage from impacts during placement or transportation. The inner side of the lower end of the centralizing body 4 is an inverted conical surface 403, which facilitates the engagement of the upper part of the wellhead connecting pipe coupling.

[0039] See Figure 1 , Figure 2 and Figure 3When a blowout or overflow occurs during construction operations, following the well control operation procedure, during the emergency installation of the wellhead plug valve, one operator can quickly and safely hold the two handles 201 of this utility model, lift it, and insert the centralizing sleeve 401 of the centralizing body 4 into the outer circle of the wellhead connecting pipe coupling. Guided by the inner inverted conical surface 403, the upper part of the wellhead connecting pipe coupling is smoothly introduced into the centralizing sleeve 401, achieving rapid alignment between the external thread of the lower connector 303 of the protective connector and the internal thread of the upper coupling of the wellhead pipe. At this time, the handles 201 can be quickly rotated for tightening, and finally, the pipe wrench is used to clamp it at the flat square 301 for a tight lock. The protective connector 3 protects the lower connector 102 of the plug valve, preventing the plug valve from being scrapped due to frequent damage to the threads of the lower connector 102 during use. If the threads of the lower connector 303 of the protective connector are found to be damaged during use, only a new protective connector 3 needs to be replaced. The centralizing body 4 can be removed and reused, thereby saving operating costs.

[0040] To address the current problems encountered during the emergency installation of wellhead plug valves, a rapid installation plug valve has been developed. This allows for safe and reliable manual hand-held installation, eliminating operational safety hazards. Simultaneously, it enables rapid alignment and connection of the lower connector of the plug valve with the wellhead tubing, significantly improving the efficiency of emergency installation and effectively preventing blowout accidents. Furthermore, it extends the service life of the plug valve and reduces operating costs.

[0041] This utility model has been applied in well control operations in the Henan Oilfield. The application shows that the plug valve of this utility model is safe and reliable, operates stably, can greatly improve the efficiency of plug valve installation, effectively prevent well blowout accidents, and at the same time protect the threads of the plug valve lower connector from damage during use, thereby increasing the service life of the plug valve and reducing operating costs.

Claims

1. A stopcock valve for blowout prevention, comprising a stopcock valve body and a ball valve switch disposed in the middle of the stopcock valve body, characterized in that, The outer wall of the plug valve body is provided with a clamping body, which is positioned above the ball valve switch so that the operator can hold the clamping body to install the plug valve at the wellhead. The upper part of the plug valve body has a fixing groove. The clamping body includes two split clamping blocks and two handles. The two split clamping blocks are clamped together in the fixing groove and are fastened at the ends by two sets of bolts and nuts. The two handles for the operator to hold are respectively fixed on the split clamping blocks and are perpendicular to the outer wall of the plug valve body.

2. The anti-blowout plug valve according to claim 1, characterized in that, The handle is cylindrical.

3. The anti-blowout plug valve according to claim 1, characterized in that, A guide body is fitted on the outer circumference of the lower connector of the plug valve body for docking with the wellhead tubing coupling. The lower end of the guide body is chamfered so that the lower end face of the guide body forms an inner inverted cone surface for guiding the docking of the wellhead tubing coupling; the inner inverted cone surface is lower than the lower connector.

4. The anti-blowout plug valve according to claim 3, characterized in that, The guide body includes an installation component and an elastic centralizing sleeve disposed on the lower end face of the installation component for engaging with the outer circle of the wellhead tubing coupling. The installation component is fitted onto the outer circumferential surface of the lower connector so that the inner circumferential surface of the elastic centralizing sleeve surrounds the lower connector. The side wall of the elastic centralizing sleeve is provided with several axially evenly distributed segmented grooves to evenly divide the elastic centralizing sleeve. The lower end face of the elastic centralizing sleeve is chamfered.

5. The anti-blowout plug valve according to claim 4, characterized in that, There are four segmented grooves.

6. The anti-blowout plug valve according to claim 4, characterized in that, The mounting component is threaded onto the outer circumference of the protective connector.

7. The anti-blowout plug valve according to claim 1, characterized in that, It also includes a protective connector. The lower connector of the plug valve body has an external thread for engaging with the internal thread of the wellhead tubing coupling. The upper end of the protective connector has an internal thread that matches the external thread of the lower connector of the plug valve body. The lower connector of the plug valve body is detachably connected to the upper end of the protective connector through the matching internal and external threads. The lower end of the protective connector is used to dock with the wellhead tubing coupling. The lower end of the protective connector serves as a lower connector for docking with the wellhead tubing coupling.

8. The anti-blowout plug valve according to claim 7, characterized in that, The outer circumference of the upper end of the protective connector is symmetrically provided with two flat squares for clamping pipe wrenches, so that when the pipe wrench used to install the plug valve is tightened, the pipe wrench is clamped at the flat squares.

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