Turnover plug valve connection device and connection method

Abstract

The present application belongs to the field of oil and gas exploration, and discloses a kind of turnover cock valve rescue device, including fixed jacket, turnover frame, propelling chuck, propelling chuck, without cock valve centering operation, and ensure the structural strength and structural stability, the present application also discloses a kind of turnover cock valve rescue method, comprising: cock valve is installed in the lower end of propelling chuck, fixed jacket is fixed on pipe column, turnover frame is turned to upright state and fixed, propelling chuck is rotated, and cock valve is rotated and installed on pipe column, propelling chuck is withdrawn from cock valve, and the device is transferred, convenient, fast, only two people can complete cock valve rescue operation, beneficial to first time control wellhead, suitable for coping with the rescue of cock valve in pipe column.

Description

Technical Field

[0001] This invention belongs to the field of oil and gas exploration, specifically a flip-type plug valve quick-connection device and quick-connection method. Background Technology

[0002] In oil and gas exploration and development, if internal blowouts occur during tubing flow and are not controlled in time, they can lead to uncontrolled blowout accidents, causing serious consequences such as casualties, equipment damage, and environmental pollution, as well as huge economic losses. Currently, emergency response methods for handling internal blowouts mainly include the emergency connection method, the discarding method, and the shearing method. The emergency connection method refers to quickly connecting a plug valve, arrow check valve, etc., at the wellhead and closing the through-hole when an internal blowout occurs, thereby controlling the internal blowout.

[0003] The current practice for quickly connecting plug valves is as follows: using a special handle, the plug valve is lifted to the top of the wellbore string where the flow is occurring. The threads are then connected to the wellhead string by rotating the plug valve, and the flow through the plug valve is closed to control the flow. However, data shows that when the flow height exceeds 1 meter, the plug valve becomes difficult to align and pressurize under the pressure of the ejected fluid, making it impossible to control the flow and ultimately leading to a blowout.

[0004] Chinese utility model patent CN205154079U discloses an independent emergency installation device for a pressurized plug valve. A vertical aligning sleeve is fitted onto the plug valve, and a clamp is fitted onto the oil pipe. The vertical aligning sleeve and clamp are connected by a horizontal adjusting section and a vertical telescopic bracket. In use, the clamp is first fitted onto the oil pipe, and the vertical aligning sleeve is fitted onto the plug valve. The plug valve is aligned with the oil pipe by adjusting the length of the horizontal adjusting section. Then, the plug valve is lowered by adjusting the length of the vertical aligning sleeve. While this device can achieve internal spray control at large internal spray heights, it also has drawbacks: (1) When using the device, it is necessary to align the plug valve with the oil pipe. For the urgent connection work, the operation is cumbersome and inefficient. (2) The entire device is a cantilever beam structure, which is difficult to withstand the impact effect of the fluid ejected from the tubing on the plug valve when it is connected. Furthermore, the advancement of the plug valve is achieved by adjusting the length of the vertical straightening sleeve on the cantilever beam. If the device is changed to a symmetrical structure in order to improve the structural strength, it is impossible to guarantee that the two symmetrical vertical straightening sleeves will move synchronously. Summary of the Invention

[0005] To address the aforementioned shortcomings in the existing technology, this invention aims to provide a flip-type plug valve quick-connection device and method, achieving the goal of eliminating the need for centering, convenient and quick operation, and stable structure.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a flip-type plug valve quick-connect device, comprising... Fixed clamping sleeve: The fixed clamping sleeve is a detachable structure with an inner diameter adapted to the pipe column and is used to fixedly sleeve on the pipe column; Flip frame: The lower end of the flip frame is hinged to the fixed clamping sleeve, and its upright state is fixed by a locking device; Advancing clamping sleeve: The advancing clamping sleeve is fixedly arranged at one end of the flip frame away from the fixed clamping sleeve. When the flip frame is in the upright state, the inner wall of the advancing clamping sleeve is coaxial with the inner wall of the fixed clamping sleeve, and an internal thread is provided on the inner wall of the advancing clamping sleeve; Advancing chuck: The advancing chuck is sleeved in the advancing clamping sleeve. The outer wall of the advancing chuck is provided with an external thread adapted to the advancing clamping sleeve, and the lower end of the advancing chuck is provided with an external thread adapted to the plug valve.

[0007] As a limitation of the present invention: A settling sleeve is fixedly arranged on the outer wall of the advancing clamping sleeve along the height direction. An oval positioning pin is rotatably arranged on the settling sleeve through a handle. The upper end of the flip frame is sleeved in the settling sleeve, and an "8" - shaped hole adapted to the oval positioning pin is arranged on the flip frame. The lower dimension of the "8" - shaped hole is larger than the upper dimension. The positioning pin is arranged by rotating and extending into the "8" - shaped hole. When the positioning pin rotates, the settling sleeve drives the advancing clamping sleeve and the advancing chuck to generate a sinking adapted to the height of the "8" - shaped hole.

[0008] As a limitation of the present invention: The flip frame includes a "C" - shaped main body part. The lower end of the main body part is hinged to the fixed clamping sleeve, and a first vertical rod is fixedly connected to the upper end of the main body part. The first vertical rod is sleeved in the settling sleeve.

[0009] As a limitation of the present invention: Two flip frames are symmetrically arranged on the fixed clamping sleeve.

[0010] As a limitation of the present invention: A loosening sleeve is fixedly arranged on the advancing chuck, and a dial hole is arranged on the loosening sleeve along the radial direction of the advancing chuck.

[0011] As a limitation of the present invention: A handwheel is fixedly arranged at the upper end of the advancing chuck.

[0012] As a limitation of the present invention: A fixed sleeve is fixedly arranged on the outer wall of the fixed clamping sleeve along the height direction. A second vertical rod is fixedly arranged in the fixed sleeve, and the locking device is rotatably arranged on the second vertical rod.

[0013] As a limitation of the present invention: The locking device includes a locking block rotatably arranged on the second vertical rod. A first locking part is fixedly arranged on the locking block. A second locking part is arranged on the flip frame for buckling and locking with the first locking part when the flip frame is in the upright state. A torsion spring is arranged between the locking block and the second vertical rod for making the locking block have a buckling and locking movement tendency.

[0014] As a limitation of the present invention: The fixed clamping sleeve is a clamp.

[0015] This invention also discloses a method for quickly connecting a flip-type plug valve, which is implemented using the aforementioned flip-type plug valve quick-connect device, and includes the following steps: S1, Install the plug valve at the lower end of the feed chuck; S2, fix the fixing sleeve on the tube column, at this time the flip-type frame is in a free state; S3, flip the flip-type frame to the upright position and fix it in the upright position by the locking device; S4, rotate the pusher chuck to drive the plug valve to rotate and install it on the tubing string; S5, disengage the pusher chuck from the plug valve and transfer the flip-type plug valve quick-connect device.

[0016] By adopting the above technical solution, the beneficial effects achieved by the present invention compared with the prior art are as follows: This invention primarily utilizes a flip-type frame to install the plug valve. When the flip-type frame is upright, the inner wall of the push-in jacket is coaxial with the inner wall of the fixed jacket, and the plug valve is installed on the push-in chuck. Structurally, this ensures the coaxiality of the plug valve and the tubing string, eliminating the need for centering the plug valve and solving the problem of difficulty in aligning the plug valve. This makes it convenient and quick to use. Simultaneously, the symmetrical arrangement of the flip-type frame ensures structural strength and stability, effectively resisting the lateral and upward forces generated by the impact of the fluid inside the pipe on the plug valve, thus solving the problem of difficulty in aligning the plug valve. The purely mechanical structure is simple and reliable, meeting the fire and explosion prevention requirements in the event of internal jetting. The frame structure is lightweight, requiring only two people to complete the plug valve connection operation, facilitating immediate control of the wellhead and preventing further escalation of the situation.

[0017] In summary, the flip-type plug valve quick-connect device of the present invention does not require centering of the plug valve and ensures structural strength and stability; the flip-type plug valve quick-connect method of the present invention is convenient and quick, requiring only two people to complete the plug valve quick-connect operation, which is beneficial for controlling the wellhead in the first time and is suitable for quick-connecting the plug valve when the tubing is blown out. Attached Figure Description

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 This is a three-dimensional structural diagram of Embodiment 1 of the present invention; Figure 2 This is an enlarged structural schematic diagram of the fixing sleeve and locking block in Embodiment 1 of the present invention; Figure 3 This is an enlarged structural diagram of the figure-eight shaped hole in Embodiment 1 of the present invention; Figure 4 This is an installation diagram of Embodiment 1 of the present invention.

[0020] In the diagram: 1-Fixed clamp, 11-Holding card, 12-Tightening rotating handwheel, 13-Fixed sleeve, 2-Flip frame, 21-Through hole, 22-Second upright, 23-Locking block, 231-Locking protrusion, 24-First upright, 3-Propulsion clamp, 31-Sinking sleeve, 32-Figure-8 hole, 33-Handle, 4-Propulsion chuck, 41-Handwheel, 42-Loosening sleeve, 43-Pulling hole, 5-Plug valve, 6-Tube string. Detailed Implementation

[0021] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the flip-type plug valve quick-connection device and method described herein are preferred embodiments and are only used for illustration and explanation of the present invention, and do not constitute a limitation thereof.

[0022] The directional terms or positional relationships used in this invention, such as "up," "down," "left," and "right," are based on the positional relationships in the accompanying drawings of this invention. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or component must have a specific orientation, or that it must be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the content protected by this invention.

[0023] Example 1 This implementation example Figures 1-4 The image shows a flip-type plug valve quick-connect device, comprising: Fixed sleeve 1: Fixed sleeve 1 is a detachable structure with an inner diameter that is compatible with the pipe string 6, and is used to fix it on the pipe string 6.

[0024] Flip-up frame 2: The lower end of the flip-up frame 2 is hinged to the fixed sleeve 1 and fixed in an upright state by a locking device.

[0025] Pushing sleeve 3: The pushing sleeve 3 is fixed to the end of the flip frame 2 away from the fixed sleeve 1. When the flip frame 2 is in an upright state, the inner wall of the pushing sleeve 3 is coaxial with the inner wall of the fixed sleeve 1, and the inner wall of the pushing sleeve 3 is provided with internal threads.

[0026] Push chuck 4: Push chuck 4 is sleeved in push sleeve 3. The outer wall of push chuck 4 is provided with external thread that is compatible with push sleeve 3. The lower end of push chuck 4 is provided with external thread that is compatible with plug valve 5.

[0027] The following is a detailed explanation of each part of the structure: (1) Fixed clip 1 In this embodiment, the fixing sleeve 1 is a quick-release clamp, such as... Figure 2As shown, the quick-release clamp includes two semi-circular clamping clips 11. The inner wall of the clamping clips 11 can be further provided with anti-slip pads to increase friction. One end of the two clamping clips 11 is hinged, and the other end forms an end that extends outward along its radial direction. A fastening rotary handwheel 12 is rotatably provided at the extended end of one clamping clip 11, and a "U"-shaped groove adapted to the fastening rotary handwheel 12 is provided at the extended end of the other clamping clip 11. In use, the hinged ends of the two clamping clips 11 are opened, the fixing sleeve 1 is fitted onto the inner spray column 6, the other ends of the two clamping clips 11 are closed, the fastening rotary handwheel 12 is flipped until it enters the "U"-shaped groove, and the fastening rotary handwheel 12 is tightened so that the wheel body is pressed against the extended end of the clamping clip 11, thus completing the installation of the fixing sleeve 1.

[0028] (2) Flip-type frame 2 To increase structural strength and stability, two flip-type frames 2 are symmetrically arranged on the fixed sleeve 1. Each flip-type frame 2 includes a "U"-shaped main body with several through holes 21, facilitating the insertion of rod-structured tools and the lifting and movement of the entire device via the rods. The lower end of the main body is hinged to the fixed sleeve 1. Specifically, a fixed sleeve 13 with a square hole on its inner wall and arranged along the height direction is fixed on the outer wall of the fixed sleeve 1. A second upright 22 with a rectangular cross-section is detachably fixed in the fixed sleeve 13 by bolts. A locking device is rotatably provided at the upper end of the second upright 22, which fixes the flip-type frame 2 in an upright state. The locking device includes a locking block 23 rotatably mounted on the upper end of the second upright 22. The locking block 23 has an "L"-shaped longitudinal section, comprising a horizontal block and a vertical block at an angle. The included angle of the "L"-shaped locking block 23 is rotatably connected to the upper end of the second upright 22 via a pivot. The locking block 23 is provided with a first locking part. In this embodiment, the first locking part is a locking groove opened on the vertical block. The lower end of the flip-type frame 2 is provided with a second locking part for engaging and locking with the first locking part when the flip-type frame 2 is in an upright state. In this embodiment, the second locking part is a locking protrusion 231 fixed to the lower end of the flip-type frame 2 and adapted to the locking groove. Figure 2 As shown, when the flip-type frame 2 is in an upright state, the laterally extending locking protrusion 231 extends into the locking groove and is positioned by the locking groove. At this time, the flip-type frame 2 remains upright. When the locking block 23 rotates clockwise around the pivot, the locking block 23 disengages from the locking groove, and the lower end of the flip-type frame 2 is in a free hinged state. In order to ensure that the flip-type frame 2 always remains upright when it is pushed forward, a torsion spring (not shown in the figure) is provided between the locking block 23 and the second upright 22 to give the locking block 23 a tendency to engage and lock. That is, without applying external force, the torsion spring keeps the locking block 23 in a position that can lock the locking protrusion 231.

[0029] At the upper end of the "C"-shaped handheld main body part, a first vertical rod 24 with a rectangular cross-section is integrally provided. The first vertical rod 24 is sleeved in a settling sleeve 31 on the propulsion jacket 3.

[0030] (3) Propulsion jacket 3 The propulsion jacket 3 is an annular structure coaxial with the fixed jacket 1. Two settling sleeves 31 arranged symmetrically on the outer wall of the propulsion jacket 3 and provided with square holes on the inner wall along the height direction. The first vertical rod 24 fixedly provided at the upper end of the flip-type frame 2 is sleeved in the settling sleeve 31. Further, an oval positioning pin is rotatably provided on the settling sleeve 31 through a handle 33. The upper end of the flip-type frame 2 is sleeved in the settling sleeve 31, and an "8"-shaped hole 32 adapted to the oval positioning pin is provided on the first vertical rod 24. As Figure 3 shown, the "8"-shaped hole 32 is formed by connecting two holes with different diameters, and the diameter of the lower hole is larger than that of the upper hole, forming a structure with a smaller upper part and a larger lower part. The long axis dimension of the oval positioning pin is adapted to the diameter of the lower hole, and the short axis dimension is adapted to the minimum diameter at the middle part of the "8"-shaped hole 32. The oval positioning pin passes through the settling sleeve 31 and extends into the "8"-shaped hole 32. In the initial state, the oval positioning pin rotates to the direction where the long axis is horizontal. At this time, the positioning pin extends into the lower hole of the "8"-shaped hole 32. Rotate the handle 33 to make the oval positioning pin rotate to the direction where the long axis is vertical and the short axis is horizontal. At this time, the positioning pin is no longer limited. Under the action of gravity, the settling sleeve 31 drives the propulsion jacket 3 and the propulsion chuck 4 to sink with a height adapted to the "8"-shaped hole 32. After sinking, the positioning pin extends into the upper hole of the "8"-shaped hole 32.

[0031] (4) Propulsion chuck 4 The propulsion chuck 4 is a rod structure. An external thread with the same pitch as that of the plug valve 5 is fixedly provided on the outer wall of the propulsion chuck 4. An internal thread adapted thereto is provided on the inner wall of the propulsion jacket 3, so that the propulsion chuck 4 is threadedly connected in the propulsion jacket 3. An external thread adapted to the plug valve 5 is provided at the lower end of the propulsion chuck 4. As Figure 4As shown, the fitting here is via a threaded connection, allowing the stopcock valve 5 to be installed at the lower end of the push chuck 4. A handwheel 41 is fixed to the upper end of the push chuck 4. Rotating the handwheel 41 causes the push chuck 4 to rotate relative to the push sleeve 3, rising or falling in the height direction, thereby driving the stopcock valve 5 to rotate and rise or fall in the height direction. Alternatively, a motor or other drive structure can be connected to the upper end of the push chuck 4, enabling the device to be automatically driven. To facilitate the removal of the push chuck 4 after the stopcock valve 5 is installed, an annular loosening sleeve 42 is fixed to the push chuck 4 below the push sleeve 3. The loosening sleeve 42 has a radially arranged tapping hole 43. One tapping hole 43 can be provided as needed, or multiple holes can be arranged circumferentially. To remove the push chuck 4 from the stopcock valve 5, a rod-shaped tool is inserted into the tapping hole 43 and a tapping force is applied circumferentially to the loosening sleeve 42.

[0032] The usage method of this embodiment is described in Embodiment 2.

[0033] Example 2 This embodiment describes a method for quickly connecting a flip-type plug valve, implemented using the flip-type plug valve quick-connect device described in Embodiment 1. Before quick-connection, the flip-type frame 2 is not locked and is in a free state, and the elliptical positioning pin of the push-jacket 3 is also located in the lower hole of the figure-eight hole 32. The quick-connection includes the following steps: S1, Install the plug valve 5 at the lower end of the push chuck 4 by pushing the external thread at the lower end of the push chuck 4; S2, two people each hold a tool with a rod structure, insert the tools into the through holes of the two flip-type frames 2 respectively, the two people cooperate, hold the tools to lift the entire snap-fit ​​device and move it to the side of the pipe column 6, fix the fixing sleeve 1 on the pipe column 6, flip the fastening rotating handwheel 12 until it enters the "U" shaped groove, tighten the fastening rotating handwheel 12 to complete the installation of the fixing sleeve 1, at this time the flip-type frame 2 is still in a free state; S3, remove the above-mentioned rod structure tool, each of the two people holds a flip frame 2, and work together to flip the flip frame 2 to an upright position. Due to the torsion spring, the locking device automatically fixes it in an upright position. S4, rotate handle 33, under the action of gravity, the settling sleeve 31 drives the pusher sleeve 3 and the pusher chuck 4 to sink, so that the pusher chuck 4 drives the plug valve 5 to have a preliminary feed. Rotate handwheel 41 to rotate the pusher chuck 4. The pusher chuck 4 moves downward, driving the plug valve 5 to move downward and rotate until the plug valve 5 is installed on the tubing 6. S5, insert the tool of the other rod structure into the tap hole 43, and apply a striking force to the rod structure in the direction of the withdrawal of the push chuck 4 to withdraw the push chuck 4 from the stop valve 5. At this time, the stop valve 5 remains stationary. Rotate the push chuck 4 in the opposite direction by handwheel 41 until the push chuck 4 and the stop valve 5 are completely separated. Then separate the fixed sleeve 1 from the tube column 6. The two people then each hold the tool of the rod structure and insert it into the through hole 21 of the two flip-type frames 2. They then use the hand tools to transfer the flip-type stop valve quick-connect device.

Claims

1. A flip-type plug valve quick-connection device, characterized in that, including Fixed jacket: The fixed jacket is a detachable structure with an inner diameter adapted to the pipe column and is used to be fixedly sleeved on the pipe column; Flip-type frame: The lower end of the flip-type frame is hinged to the fixed jacket and is fixed in its upright state by a locking device; Thrust jacket: The thrust jacket is fixedly arranged at one end of the flip-type frame away from the fixed jacket. When the flip-type frame is in the upright state, the inner wall of the thrust jacket is coaxial with the inner wall of the fixed jacket, and an internal thread is provided on the inner wall of the thrust jacket; A settlement sleeve is fixedly arranged on the outer wall of the thrust jacket along the height direction. An oval positioning pin is rotatably arranged on the settlement sleeve through a handle. The upper end of the flip-type frame is sleeved in the settlement sleeve, and an "8”-shaped hole adapted to the oval positioning pin is arranged on the flip-type frame. The lower dimension of the "8”-shaped hole is larger than the upper dimension. The positioning pin is arranged by rotating and extending into the "8”-shaped hole. When the positioning pin rotates, the settlement sleeve drives the thrust jacket and the thrust chuck to produce a sinkage adapted to the height of the "8”-shaped hole; Thrust chuck: The thrust chuck is sleeved in the thrust jacket. The outer wall of the thrust chuck is provided with an external thread adapted to the thrust jacket, and the lower end of the thrust chuck is provided with an external thread adapted to the plug valve; A fixed sleeve is fixedly arranged on the outer wall of the fixed jacket along the height direction. A second vertical rod is fixedly arranged in the fixed sleeve. The locking device is rotatably arranged on the second vertical rod; The locking device includes a locking block rotatably arranged on the second vertical rod. A first locking portion is fixedly arranged on the locking block. A second locking portion is arranged on the flip-type frame for buckling and locking with the first locking portion when the flip-type frame is in the upright state. A torsion spring is arranged between the locking block and the second vertical rod to make the locking block have a tendency of buckling and locking movement; 2. The flip-type plug valve quick-connect device according to claim 1, characterized in that, The flip-type frame includes a "C”-shaped main body part. The lower end of the main body part is hinged to the fixed jacket, and the upper end of the main body part is fixedly connected with a first vertical rod, and the first vertical rod is sleeved in the settlement sleeve; 3. The flip-type plug valve quick-connect device according to claim 2, characterized in that, Two flip-type frames are symmetrically arranged on the fixed jacket; 4. The flip-type plug valve quick-connect device according to claim 1, characterized in that, A loosening sleeve is fixedly arranged on the thrust chuck, and a dial hole is opened in the loosening sleeve along the radial direction of the thrust chuck; 5. The flip-type plug valve quick-connect device according to claim 1, characterized in that, A handwheel is fixedly arranged at the upper end of the thrust chuck; 6. The flip-type plug valve quick-connect device according to any one of claims 1 to 5, characterized in that, The fixed jacket is a clamp; 7. A method for quickly connecting a flip-type plug valve, characterized in that, It is realized by the flip-type plug valve quick-connection device described in any one of claims 1 to 6, including the following steps: S1, install the plug valve at the lower end of the thrust chuck; S2, fix the fixed jacket on the pipe column. At this time, the flip-type frame is in a free state; S3, flip the flip-type frame to the upright state and fix its upright state through the locking device; S4, rotate the thrust chuck to drive the plug valve to be rotatably installed on the pipe column; S5, withdraw the thrust chuck from the plug valve and transfer the flip-type plug valve quick-connection device.

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