A light-weight quick connector device and inner blowout preventer tool suitable for drill tool float valve

Abstract

The utility model provides a kind of lightweight snatch connection device and inner blowout preventer tool suitable for drilling tool float valve, the lightweight snatch connection device includes shell, overflow limiting cylinder, limit cap and limit lock, wherein, shell is set on overflow limiting cylinder, shell is equipped with elastic member, and overflow limiting cylinder compresses elastic member;Limit lock passes through shell and limits overflow limiting cylinder;If unfastening limit lock, overflow limiting cylinder moves to limit cap direction by elastic force of elastic member;Limit cap is arranged at the top of shell.The utility model has beneficial effects, can quickly tool drilling tool water eye, snatch connection operation success rate is high, and the continuous deterioration of accident caused by drilling fluid continuous outflow can be effectively prevented.

Description

Technical Field

[0001] This utility model relates to the field of oil drilling, specifically to a lightweight quick-connect device and internal blowout preventer suitable for drill string float valves. Background Technology

[0002] Blowouts and well kicks are frequent occurrences during drilling operations. Although each well site is equipped with internal blowout preventers (IBEPs) for drilling operations, existing IEPs often experience problems such as jamming, sealing failure, and short lifespan, leading to incomplete closure of the water channels within the drill string and resulting in blowouts and well kicks. For blowouts caused by IEP failure, immediate well shut-in and timely connection of the drill string check valve are crucial measures in handling such incidents.

[0003] Traditional quick-connection check valves use an arrow-shaped check valve with a push-opening device. After the quick-connection is completed, the push-opening device is released, and the valve body rises to the valve seat under the action of a spring, closing the water inlet and preventing drilling fluid from rising. However, this tool has problems such as long quick-connection time, high quick-connection resistance, and easy quick-connection failure. Therefore, it is necessary to design a lightweight quick-connection device and internal blowout preventer that has a short quick-connection time and can quickly close the water inlet of the drill string.

[0004] Chinese utility model patent with publication number "CN214660054U" and title "A Blowout Safety Valve Quick Connection Device" provides a blowout quick connection device. This device can achieve rapid, accurate and reliable alignment between the blowout safety valve and the drill string water hole. However, this application cannot achieve rapid docking with the drill string float valve to complete the rapid quick connection of the wellhead drill string in conjunction with the drill string float valve. Utility Model Content

[0005] The purpose of this invention is to address at least one of the aforementioned shortcomings of the existing technology. For example, one objective of this invention is to provide a lightweight quick-connect device for quickly closing the drill string float valve. Another objective of this invention is to provide an internal blowout preventer that enables rapid quick-connection operations.

[0006] To achieve the above objectives, this utility model provides a lightweight quick-connect device suitable for drill float valves. The lightweight quick-connect device may include a housing, a flow-limiting cylinder, a limiting cover, and a limiting lock. The housing is fitted onto the flow-limiting cylinder, and an elastic element is provided inside the housing. The flow-limiting cylinder compresses the elastic element. The limiting lock passes through the housing to restrict and lock the flow-limiting cylinder. If the limiting lock is released, the flow-limiting cylinder moves towards the limiting cover under the elastic force of the elastic element. The limiting cover is located at the top of the housing.

[0007] According to one or more exemplary embodiments of one aspect of the present invention, a threaded hole may be provided on the housing, and the working end of the limit lock may be provided with a male thread. The working end of the limit lock passes through the housing and is screwed into the threaded hole of the housing.

[0008] According to one or more exemplary embodiments of one aspect of the present invention, the limiting cover may be threadedly connected to the housing.

[0009] According to one or more exemplary embodiments of one aspect of the present invention, the interior of the flow limiting cylinder may be a full-bore structure.

[0010] According to one or more exemplary embodiments of one aspect of the present invention, a sealing element may be provided between the housing and the overflow limiting cylinder, and the sealing element is located below the elastic element.

[0011] According to one or more exemplary embodiments of one aspect of the present invention, a handle may be provided on the outer side of the housing.

[0012] According to one or more exemplary embodiments of one aspect of the present invention, the housing is threadedly connected to the drill float valve.

[0013] This utility model; on the other hand, provides an internal blowout preventer tool, which may include a float valve and the aforementioned lightweight quick-connect device for drill float valves, wherein the float valve is connected to the bottom of the housing, and a valve plate is provided in the valve core of the float valve.

[0014] According to one or more exemplary embodiments of another aspect of the present invention, when the overflow limiting cylinder is in the locked state, the valve plate can remain in the open state; when the overflow limiting cylinder is in the unlocked state, the valve plate can be in the free state, the valve plate is unlocked, and the valve plate can fit with the valve core under the impact force of the well blowout or well kick drilling fluid, thereby closing the wellbore inside the drill string.

[0015] According to one or more exemplary embodiments of another aspect of the present invention, the bottom of the housing is threadedly connected to the float valve.

[0016] Compared with the prior art, the beneficial effects of this utility model include at least one of the following: (1) The emergency connection device provided by this utility model has a short connection time, can quickly connect tools and drill water holes, has a high success rate of emergency connection operation, and can effectively prevent the continuous outflow of drilling fluid from causing the continuous deterioration of the accident.

[0017] (2) The flow limiting cylinder of the emergency connection device provided by this utility model adopts a full-bore structure design, which helps the drilling fluid to flow during the emergency connection process and reduces the impact force of the drilling fluid on the float valve during the emergency connection.

[0018] (3) The snap-fit ​​device provided by this utility model is provided with a threaded connection structure of a limit cover and a housing to prevent the spring from rebounding and causing the overflow limit cylinder to rush out of the housing.

[0019] (4) The internal anti-blowout tool provided by this utility model uses the overflow limiting cylinder to forcibly open the float valve plate, so that the float valve always keeps the water hole unobstructed during the drilling tool connection process. Attached Figure Description

[0020] The above and other objects and / or features of this utility model will become clearer from the following description taken in conjunction with the accompanying drawings, wherein: Figure 1 A structural cross-sectional view of a lightweight snap-on device according to an exemplary embodiment of the present invention is shown; Figure 2 A schematic diagram of the housing structure of an exemplary embodiment of the present invention is shown; Figure 3 A cross-sectional view of the internal blowout preventer structure of an exemplary embodiment of the present invention is shown.

[0021] Explanation of key figure labels: 1-Handle, 2-Overflow limiting cylinder, 3-Sealing ring, 4-Elastic element, 5-Housing shell, 6-Limit cover, 7-Limit lock, 8-Float valve, 9-Valve plate. Detailed Implementation

[0022] In the following description, a lightweight quick-connect device and internal blowout preventer for drill float valves according to the present invention will be explained in detail with reference to exemplary embodiments.

[0023] In the description of this application, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0024] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] First exemplary embodiment This exemplary embodiment provides a lightweight quick-connect device suitable for drill string float valves.

[0026] Figure 1 A structural cross-sectional view of a lightweight snap-on device according to an exemplary embodiment of the present invention is shown; Figure 2 A schematic diagram of the housing structure of an exemplary embodiment of the present invention is shown below. (Followed by...) Figures 1-2 This exemplary embodiment describes a lightweight quick-connect device suitable for drill string float valves.

[0027] In this exemplary embodiment, as Figure 1 As shown, the lightweight quick-connect device mainly includes a housing 5, a flow-limiting cylinder 2, a limiting cover 6, and a limiting lock 7. The housing 5 is fitted onto the flow-limiting cylinder 2, and a chamber is formed between the outer side of the flow-limiting cylinder 2 and the inner side of the housing 5. An elastic element 4 is provided within the chamber. The flow-limiting cylinder 2 compresses the elastic element 4; here, the elastic element 4 may include a spring. The limiting lock 7 passes through the housing 5 to restrict and lock the flow-limiting cylinder 2. Specifically, the flow-limiting cylinder 2, the elastic element 4, and the limiting lock 7 form an interlocking structure. When the flow-limiting cylinder 2 is locked by the limiting lock 7, the elastic element 4 can be compressed into the chamber by the flow-limiting cylinder 2. When the flow-limiting cylinder 2 is unlocked, the elastic element... 4 is configured to provide a force to the overflow limiting cylinder 2 to move toward the top of the housing 5. At this time, the overflow limiting cylinder 2 rebounds under the force of the elastic element 4 (i.e., moves toward the top of the housing) and moves away from the float valve. At this time, the float valve is unlocked. The interlocking structure formed by the limit lock 7, the elastic element 4, and the overflow limiting cylinder 2 can ensure that the overflow channel remains unobstructed during the emergency connection process. After the emergency connection is completed, the overflow limiting cylinder 2 can be restored to its original position in a timely and rapid manner. The overflow limiting cylinder 2 rebounds under the force of the torsion spring, and the valve plate automatically closes under the impact force of the drilling fluid. If the limit lock 7 is released, the overflow limiting cylinder 2 moves in the direction of the limiting cover 6 under the elastic force of the elastic element 4.

[0028] The limiting cover 6 is located at the top of the housing 5, and the top of the housing 5 and the limiting cover 6 can be connected by threads. The threaded connection between the limiting cover 6 and the housing 5 can prevent the overflow limiting cylinder 2 from being pushed out of the housing 5 when the elastic element 4 rebounds.

[0029] In this exemplary embodiment, as Figure 1 As shown, a threaded hole may be provided on the housing 5, and the working end of the limit lock 7 may be provided with a male thread. The working end of the limit lock 7 passes through the housing 5 and is screwed into the threaded hole of the housing 5.

[0030] In this exemplary embodiment, as Figure 1 As shown, the limiting cover 6 is threadedly connected to the housing 5.

[0031] In this exemplary embodiment, as Figure 1 As shown, the inside of the flow limiting cylinder 2 is a full-bore structure. This structure helps the drilling fluid to flow during the emergency connection process and reduces the impact force of the drilling fluid on the float valve during the emergency connection.

[0032] In this exemplary embodiment, as Figure 1 As shown, a sealing element is provided between the housing 5 and the flow limiting cylinder 2, and the sealing element is located below the elastic element. Here, the sealing element may include a sealing ring 3, and a sealing groove may be provided on the inner side of the housing at the lower end of the chamber, in which the sealing ring 3 is placed. This structure can prevent drilling fluid from entering the spring chamber during the connection process, and prevent the flow limiting cylinder 2 from getting stuck between the housing 5 and the spring.

[0033] In this exemplary embodiment, as Figure 2 As shown, a handle 1 is provided on the outside of the casing, for example, two handles may be provided. In actual drilling, when it is discovered that there may be accidents such as blowout, well kick, or overflow in the well, the drilling workers on site can quickly lift the handle 1, lift the float valve and the quick-connect device as a whole, and quickly connect them to the threaded joint of the wellhead drill string. After the float valve thread is tightened with the threaded joint of the wellhead drill string, the limit lock of the casing is rotated to make the limit lock quickly disengage, the overflow limit cylinder is unlocked and resumes free movement, and returns to its original position under the action of spring force, pressing against the limit cover; the valve plate locked by the overflow limit cylinder is unlocked and is in a free state. Under the impact force of the drilling fluid in the blowout or well kick, the valve plate is in contact with the valve core, thereby achieving the purpose of closing the wellbore inside the drill string.

[0034] In this exemplary embodiment, the lightweight emergency rendezvous device can be made of a material lighter than conventional steel, such as steel with a density of less than approximately 7.85 g / cm³, like aluminum alloy, titanium alloy, or aluminum-magnesium alloy, specifically, for example, 42CrMo, 4145H, 40CrNiMo, etc. Alternatively, plastic materials can also be used. This high-strength, low-density material ensures compliance with usage requirements while significantly reducing the overall weight of the device, which is beneficial for emergency rendezvous operations.

[0035] Second exemplary embodiment This exemplary embodiment provides an internal blowout preventer.

[0036] Figure 3 A cross-sectional view of the internal blowout preventer structure of an exemplary embodiment of the present invention is shown below. Figure 3 To describe the internal spray protection tool of this exemplary embodiment.

[0037] In this exemplary embodiment, as Figure 3 As shown, the internal blowout preventer mainly includes a float valve 8 and a lightweight quick-connect device for the drill float valve as described in the first exemplary embodiment above, wherein the float valve is provided at the bottom opening of the housing, and the bottom of the housing can be threadedly connected to the drill float valve.

[0038] In this example embodiment, as Figure 3As shown, the valve core of the float valve 8 is provided with a valve plate 9. When the overflow limiting cylinder is in the locked state, the overflow limiting cylinder passes through the inner hole of the valve plate in the valve core and opens the valve plate. At this time, the valve plate 9 remains in the open state. When the overflow limiting cylinder is unlocked, the limiting lock is released, and the overflow limiting cylinder retracts from the valve core to the limiting cover under the influence of the elastic force of the elastic element. At this time, the valve plate 9 is unlocked. After the valve plate 9 is no longer under force, it automatically recovers and closes under the action of the well blowout drilling fluid. At this time, the valve plate 9 is in a free state and is in contact with the valve core with the well blowout and well kick drilling fluid.

[0039] The use of this lightweight rendezvous device may include the following: The lightweight quick-connect device is assembled with the float valve. Specifically, the housing and float valve can be pre-tightened with a screw for emergency use. The overflow limiting cylinder, spring, and limit lock in the lightweight quick-connect device form an interlocking structure, always keeping the valve plate in the open position.

[0040] In actual drilling operations, when a blowout, kick, or overflow is detected downhole, the drilling workers on site can quickly lift the float valve and the quick-connect device by the handle and quickly connect them to the threaded joint of the drill string at the wellhead. After the threads of the float valve are tightened with the threaded joint of the drill string at the wellhead, the limit lock on the housing is rotated to release it quickly. The overflow limit cylinder is unlocked and returns to its free movement, and is then returned to its original position by the spring force, pressing against the limit cover. The valve plate, which was locked by the overflow limit cylinder, is unlocked and is in a free state. Under the impact force of the drilling fluid during a blowout or kick, the valve plate fits against the valve core, thereby achieving the purpose of closing the wellbore inside the drill string.

[0041] In summary, the advantages of this utility model may include at least one of the following: (1) The emergency connection device provided by this utility model adopts a lightweight design. The overall material can be selected from low-density materials such as high-strength aluminum alloy, titanium alloy, and aluminum-magnesium alloy, which not only ensures the requirements of use, but also greatly reduces the overall weight of the device, which is conducive to emergency connection operations.

[0042] (2) The emergency connection device provided by this utility model is equipped with an interlocking structure of limit lock, spring and overflow limit cylinder to ensure that the overflow channel is unobstructed during the emergency connection process; after the emergency connection is completed, the overflow limit cylinder can be restored to its action in a timely and fast manner, the overflow limit cylinder rebounds under the force of the torsion spring, and the valve plate automatically closes under the impact force of drilling fluid.

[0043] (3) The quick-connect device provided by this utility model has a sealing groove at the inner hole of the housing. During the quick-connect process, the sealing ring can prevent drilling fluid from entering the spring chamber and prevent the overflow limiting cylinder from getting stuck with the housing.

[0044] (4) The internal anti-spray tool provided by this utility model is simple to operate and can quickly achieve the purpose of interception.

[0045] Although the present invention provides a lightweight quick-connect device and internal blowout preventer for drill float valves, as described above in conjunction with exemplary embodiments, those skilled in the art should understand that various modifications and changes can be made to the exemplary embodiments of the present invention without departing from the spirit and scope defined by the claims.

Claims

1. A lightweight quick-connect device for drill string float valves, characterized in that, The lightweight quick-connection device includes a housing, a flow-limiting cylinder, a limiting cover, and a limiting lock. A housing is fitted onto the overcurrent limiting cylinder, and an elastic element is provided inside the housing. The overcurrent limiting cylinder compresses the elastic element. A limit lock passes through the housing to restrict and lock the overcurrent limiting cylinder. If the limit lock is released, the overcurrent limiting cylinder moves towards the limit cover under the elastic force of the elastic element. The limit cover is located at the top of the housing.

2. The lightweight quick-connect device for drill string float valves according to claim 1, characterized in that, The housing is provided with a threaded hole, and the working end of the limit lock is provided with a male thread. The working end of the limit lock passes through the housing and is screwed into the threaded hole of the housing.

3. The lightweight quick-connect device for drill string float valves according to claim 1, characterized in that, The limiting cover is threadedly connected to the housing.

4. The lightweight quick-connect device for drill string float valves according to claim 1, characterized in that, The inside of the flow limiting cylinder is a full-bore structure.

5. The lightweight quick-connect device for drill string float valves according to claim 1, characterized in that, A sealing element is provided between the housing and the overflow limiting cylinder, and the sealing element is located below the elastic element.

6. The lightweight quick-connect device for drill string float valves according to claim 1, characterized in that, A handle is provided on the outside of the housing.

7. The lightweight quick-connect device for drill string float valves according to claim 1, characterized in that, The housing is threadedly connected to the drill float valve.

8. An internal anti-spray tool, characterized in that, The internal blowout preventer includes a float valve and a lightweight quick-connect device for a drill float valve as described in any one of claims 1 to 7, wherein the float valve is connected to the bottom of the housing, and a valve plate is provided in the valve core of the float valve.

9. The internal anti-spray tool according to claim 8, characterized in that, When the overflow limiting cylinder is in the locked state, the valve plate remains in the open state; when the overflow limiting cylinder is in the unlocked state, the valve plate is in the free state, the valve plate is unlocked, and the valve plate can fit against the valve core under the impact force of the well blowout or well kick drilling fluid, thereby closing the wellbore inside the drill string.

10. The internal anti-spray tool according to claim 8, characterized in that, The bottom of the housing is threadedly connected to the float valve.

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