Wellhead preset sealing mechanism for rope operation
By designing a pre-sealed wellhead mechanism for rope-operated work, and utilizing components such as connectors, first sealing kits, and adjusting cylinders to achieve rapid sealing of the rope, the problem of low wellhead sealing efficiency caused by well kicks and blowouts is solved, thereby improving construction efficiency and safety.
Patent Information
- Application Number
- CN202520043575.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-09
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2035-01-09
AI Technical Summary
In existing oil and water well wireline testing operations, well kicks and blowouts lead to low wellhead sealing efficiency, affecting construction safety and the environment. Furthermore, traditional treatment methods are inefficient and pose safety hazards.
Design a wellhead pre-sealing mechanism for rope work, including a connector, a first sealing kit, an adjusting cylinder and a horn-shaped adjusting head. It achieves rapid sealing of the rope through threaded connection and snap-fit structure, and can quickly seal the wellhead in the event of well kick or blowout. It is suitable for rope tools of different diameters.
It enables rapid sealing of wellheads during well kicks or blowouts, preventing environmental pollution and safety hazards, improving construction efficiency, reducing labor intensity, and is suitable for rope tools of different diameters. It is pressure resistant, stable, and can be used in multiple stages.
Smart Images
Figure CN223510887U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of oilfield production, and in particular to a wellhead pre-sealing mechanism for rope-operated work. Background Technology
[0002] During oil and water well wireline testing operations, changes in formation energy or the suction effect of downhole instruments connected by the wireline can cause an increase in pressure inside the wellbore, leading to wellhead gushing or blowouts, causing environmental pollution. In severe cases, the instruments may even break off and fall into the well due to twisting or detachment.
[0003] The traditional approach is to immediately stop the testing operation upon discovering signs of a well kick, pull the ropes and instruments out of the wellbore, quickly install a stopcock to seal the wellhead, and resume the testing operation only after the well has been vented or the pressure inside the well has decreased.
[0004] However, this method greatly reduces the testing efficiency of rope construction and also poses certain risks of environmental pollution and construction safety hazards. Utility Model Content
[0005] One of the purposes of this application is to provide a wellhead pre-sealing mechanism for roped operations, which aims to solve the problem of low efficiency in sealing wellheads during existing oil and water well roped testing operations when well kick occurs.
[0006] The technical solution of this application is:
[0007] A pre-sealed wellhead mechanism for rope-assisted drilling includes a connector, a first sealing kit, an adjusting cylinder, and a flared adjusting head. The connector is connected to a tubing coupling. The first sealing kit is detachably and sealingly installed in the inner cavity of the connector for sealing and clamping the rope used in downhole operations. The adjusting cylinder is connected to the connector, with one end extending into the connector and pressing tightly against the first sealing kit. The flared adjusting head is connected to the adjusting cylinder.
[0008] As one technical solution of this application, the connector is threadedly connected to the oil pipe coupling.
[0009] As one technical solution of this application, the first sealing kit includes two first sealing pressure pads and multiple first sealing gaskets; one of the first sealing pressure pads, multiple first sealing gaskets and another first sealing pressure pad are sequentially sealed and installed in the inner cavity of the connector, and sequentially sealed and clamped to the rope, and the first sealing pressure pad and the first sealing gasket are in tight contact.
[0010] As one technical solution of this application, the first sealing pressure pad includes a first snap-fit block and a first snap-fit member, both made of metal; the first snap-fit block and the first snap-fit member are both semi-circular structures, and the first snap-fit block is provided with a dovetail groove, and the first snap-fit member is provided with a locking block; the locking block is tenon-and-mortise connected to the dovetail groove, so that the first snap-fit block and the first snap-fit member together seal and clamp the rope.
[0011] As one technical solution of this application, the first sealing gasket includes a first snap-fit block and a first snap-fit member, both made of rubber; the first snap-fit block and the first snap-fit member are both semi-circular structures, and the first snap-fit block is provided with a dovetail groove, and the first snap-fit member is provided with a locking block; the locking block is tenon-and-mortise connected to the dovetail groove, so that the first snap-fit block and the first snap-fit member together seal and clamp the rope.
[0012] As one technical solution of this application, the adjusting cylinder is threadedly connected to the connecting head.
[0013] As one technical solution of this application, it also includes a second sealing kit; the second sealing kit is detachably and sealingly installed in the inner cavity of the adjusting cylinder for sealing the clamp on the rope; one end of the horn-shaped adjusting head extends into the adjusting cylinder and presses tightly against the second sealing kit.
[0014] As one technical solution of this application, the second sealing kit includes two second sealing pressure pads and multiple second sealing gaskets; one of the second sealing pressure pads, multiple second sealing gaskets and another second sealing pressure pad are sequentially sealed and installed in the inner cavity of the adjusting cylinder, and sequentially sealed and clamped to the rope, and the second sealing pressure pad and the second sealing gasket are in tight contact.
[0015] As one technical solution of this application, the second sealing pad includes a second snap-fit block and a second snap-fit member, both made of metal; the second snap-fit block and the second snap-fit member are both semi-circular structures, and the second snap-fit block is provided with a dovetail groove, and the second snap-fit member is provided with a locking block; the locking block is tenon-and-mortise connected to the dovetail groove, so that the second snap-fit block and the second snap-fit member together seal and clamp the rope.
[0016] As one technical solution of this application, the second sealing gasket includes a second snap-fit block and a second snap-fit member, both made of rubber; the second snap-fit block and the second snap-fit member are both semi-circular structures, and the second snap-fit block is provided with a dovetail groove, and the second snap-fit member is provided with a locking block; the locking block is tenon-and-mortise connected to the dovetail groove, so that the second snap-fit block and the second snap-fit member together seal and clamp the rope.
[0017] The beneficial effects of this application are:
[0018] During ropeway operations, the connector, adjusting cylinder, and horn-shaped adjusting head of this device are pre-installed at the wellhead in sequence. When signs of a sudden well kick or blowout occur, the first sealing kit is installed in the connector. The sealing performance of the first sealing kit on the rope is adjusted by tightening the adjusting cylinder and the horn-shaped adjusting head, ensuring that the first sealing kit and the rope work together to seal the wellhead passage. This achieves the goal of controlling wellhead overflow while allowing ropeway operations to continue normally. This device is simple and convenient to operate, enabling rapid sealing of the wellhead during ropeway construction and effectively improving construction efficiency. It has stable pressure resistance, can be used in multiple stages, is safe and reliable, causes minimal damage to the rope, and effectively reduces the labor intensity of workers. Attached Figure Description
[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.
[0020] Figure 1 A schematic diagram of a pre-sealed wellhead mechanism for rope-operated work provided in an embodiment of this application;
[0021] Figure 2 This is an exploded view of the pre-sealed wellhead mechanism for rope-operated work provided in an embodiment of this application;
[0022] Figure 3 This is a schematic diagram of the first sealing gasket provided in an embodiment of this application.
[0023] Icons: 1-Connector; 2-Adjusting cylinder; 3-Flare-shaped adjusting head; 4-Oil pipe coupling; 5-Rope; 6-First sealing gasket; 7-First sealing gasket; 8-First snap-fit block; 9-First snap-fit component; 10-Second sealing gasket; 11-Second sealing gasket. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.
[0025] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0027] In the description of this application, it should be noted that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. They are only used to facilitate the description of this application and to simplify 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.
[0028] Furthermore, in this application, unless otherwise expressly specified and limited, "above or below" the first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Moreover, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0029] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0030] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0031] Example:
[0032] To effectively improve the efficiency of rope 5 construction, reduce the labor intensity of workers, eliminate environmental hazards, avoid the safety risks of sudden well surges and blowouts due to untimely control, and achieve uninterrupted rope 5 construction operations, please refer to... Figure 1 (Refer to) Figure 2 and Figure 3 This application provides a pre-sealing mechanism for the wellhead during wireline 5 operations. It is primarily used in wireline 5 testing well construction. When a sudden well kick or blowout occurs and various instruments and tools cannot be retrieved in time, this device can be quickly installed to seal the wellhead. The device mainly includes a connector 1, a first sealing kit, an adjusting cylinder 2, a second sealing kit, and a flared adjusting head 3. The connector 1 is threaded onto the tubing coupling 4. The first sealing kit is detachably and sealed within the inner cavity of the connector 1, used to seal and clamp onto the wireline 5 during downhole operations. The adjusting cylinder 2 is threaded onto the connector 1, with one end extending into the connector 1 and pressed tightly against the first sealing kit. The second sealing kit is detachably and sealed within the inner cavity of the adjusting cylinder 2, used to seal and clamp onto the wireline 5. The flared adjusting head 3 is threaded onto the adjusting cylinder 2, with one end extending into the adjusting cylinder 2 and pressed tightly against the second sealing kit. Furthermore, the testing instruments used for logging are installed in the tubing coupling 4.
[0033] Furthermore, the first sealing assembly includes two first sealing gaskets 6 and multiple first sealing pads 7; one first sealing gasket 6, multiple first sealing pads 7 and another first sealing gasket 6 are sequentially sealed and installed in the inner cavity of the connector 1, and sequentially sealed and clamped to the rope 5; the outer peripheral walls of the first sealing gaskets 6 and the first sealing pads 7 are tightly connected to the inner peripheral wall of the connector 1, and the multiple first sealing pads 7 are pressed tightly on the bottom first sealing gasket 6, while the top first sealing gasket 6 is pressed tightly on the multiple first sealing pads 7.
[0034] Specifically, the first sealing gasket 6 includes a first snap-fit block 8 and a first snap-fit element 9, both made of metal, such as 62 copper. Both the first snap-fit block 8 and the first snap-fit element 9 have a semi-circular structure, with the first snap-fit block 8 having a dovetail groove and the first snap-fit element 9 having a locking block. By tenoning the locking blocks into the dovetail grooves, the first snap-fit block 8 and the first snap-fit element 9 can jointly seal and clamp onto the rope 5. Simultaneously, the first sealing gasket 7 includes a first snap-fit block 8 and a first snap-fit element 9, both made of rubber, such as nitrile rubber. Both the first snap-fit block 8 and the first snap-fit element 9 have a semi-circular structure, with the first snap-fit block 8 having a dovetail groove and the first snap-fit element 9 having a locking block. By tenoning the locking blocks into the dovetail grooves, the first snap-fit block 8 and the first snap-fit element 9 can jointly seal and clamp onto the rope 5.
[0035] Furthermore, the second sealing kit includes two second sealing gaskets 10 and multiple second sealing pads 11; one second sealing gasket 10, multiple second sealing pads 11 and another second sealing gasket 10 are sequentially sealed and installed in the inner cavity of the adjusting cylinder 2, and sequentially sealed and clamped to the rope 5; the outer peripheral walls of the second sealing gaskets 10 and the second sealing pads 11 are tightly connected to the inner peripheral wall of the adjusting cylinder 2, and the multiple second sealing pads 11 are pressed tightly against the second sealing gasket 10 at the bottom, while the second sealing gasket 10 at the top is pressed tightly against the multiple second sealing pads 11.
[0036] Specifically, the second sealing gasket 10 includes a second snap-fit block and a second snap-fit component, both made of metal, such as 62 copper. Both the second snap-fit block and the second snap-fit component are semi-circular in shape, with a dovetail groove on the second snap-fit block and a locking block on the second snap-fit component. The locking blocks are tenon-and-mortise connected to the dovetail groove, allowing the second snap-fit block and the second snap-fit component to jointly seal and clamp onto the rope 5. Simultaneously, the second sealing gasket 11 includes a second snap-fit block and a second snap-fit component, both made of rubber, such as nitrile rubber. Both the second snap-fit block and the second snap-fit component are semi-circular in shape, with a dovetail groove on the second snap-fit block and a locking block on the second snap-fit component. The locking blocks are tenon-and-mortise connected to the dovetail groove, allowing the second snap-fit block and the second snap-fit component to jointly seal and clamp onto the rope 5.
[0037] Before construction, the connector 1, adjusting cylinder 2, and trumpet-shaped adjusting head 3 of the device are connected to the construction wellhead in sequence. The first sealing gasket 6, the first sealing gasket 7, the second sealing gasket 10, and the second sealing gasket 11, which are matched with the outer diameter of the construction rope 5, are selected for standby.
[0038] When signs of well kick or blowout suddenly appear at the wellhead, first remove the pre-installed regulating cylinder 2 and the horn-shaped regulating head 3 at the wellhead. Then, install the first sealing gasket 6 and the first sealing gasket 7 into the connector 1 in sequence. Next, install the regulating cylinder 2 and the horn-shaped regulating head 3 on the connector 1 to rotate and tighten the first sealing gasket 6 and the first sealing gasket 7. This allows the first sealing gasket 6 and the first sealing gasket 7 to seal the annular channel between the rope 5 and the wellhead, thereby controlling the wellhead overflow while still allowing the rope 5 to operate normally.
[0039] If the wellhead pressure is high and the single-stage seal is uncontrollable, and overflow continues, multi-stage operation can be performed. This involves disassembling the pre-installed horn-shaped regulating head 3, sequentially installing the second sealing gasket 10 and the second sealing gasket 11 inside the regulating cylinder 2, then installing the horn-shaped regulating head 3 and rotating it to tighten the second sealing gasket 10 and the second sealing gasket 11. This seals the annular channel between the second sealing gasket 10 and the second sealing gasket 11 and the rope 5 and the wellhead. Simultaneously, a needle valve and overflow pipeline are installed on the overflow hole on the regulating cylinder 2 to guide some of the overflowing well fluid into the sludge tank, reducing the overflow pressure and achieving the goal of safely controlling the wellhead while continuing rope 5 operations.
[0040] The sealing kit consists of a first sealing pad 6, a first sealing pad 7, a second sealing pad 10, and a second sealing pad 11, which are of the upper and lower dovetail shape. Under the action of the annular contact surface of the adjusting cylinder 2, the first sealing pad 6, the first sealing pad 7, the second sealing pad 10, and the second sealing pad 11 have good wrapping properties for the rope 5 and good sealing effect.
[0041] Therefore, during rope 5 operation, the connector 1, adjusting cylinder 2, and trumpet-shaped adjusting head 3 of this device are pre-installed at the wellhead in sequence. When signs of well kick or blowout occur at the wellhead, the first sealing kit is installed in the connector 1, and the sealing performance of the first sealing kit to the rope 5 is adjusted by tightening the adjusting cylinder 2 and the trumpet-shaped adjusting head 3. This ensures that the first sealing kit and the rope 5 together seal the wellhead passage, achieving the goal of controlling wellhead overflow while still allowing normal rope 5 operation. This device is mainly used to seal the wellhead when well kick or blowout is detected during rope 5 testing. It can quickly seal the wellhead without cutting the rope 5, avoiding environmental pollution and safety hazards. It can effectively improve construction efficiency, reduce the labor intensity of workers, and achieve safe rope 5 testing operations. This device is simple and convenient to operate, enabling rapid sealing of the wellhead during rope 5 construction and effectively improving construction efficiency. It employs a first sealing gasket 6 composed of a first snap-fit block 8 and a first snap-fit component 9, a second sealing gasket 10 composed of a second snap-fit block and a second snap-fit component, a first sealing gasket 7 composed of the first snap-fit block 8 and the first snap-fit component 9, and a second sealing gasket 11 composed of the second snap-fit block and the second snap-fit component. This allows the first and second sealing kits to seal the wellhead, providing stable pressure resistance, strong sealing performance, and multi-stage usability. It is safe and reliable, causes minimal damage to the rope 5, and effectively reduces the labor intensity of workers. Furthermore, this device is suitable for use with rope 5 tools and instruments of different diameters when lowered into the well, minimizing damage to the rope 5 and effectively reducing the labor intensity of workers.
[0042] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A wellhead pre-sealing mechanism for rope-operated work, characterized in that, The device includes a connector, a first sealing kit, an adjusting cylinder, and a horn-shaped adjusting head; the connector is connected to a tubing coupling; the first sealing kit is detachably and sealingly installed in the inner cavity of the connector for sealing and clamping onto the downhole working rope; the adjusting cylinder is connected to the connector, with one end extending into the connector and pressed tightly against the first sealing kit; the horn-shaped adjusting head is connected to the adjusting cylinder.
2. The wellhead pre-sealing mechanism for ropeway operation according to claim 1, characterized in that, The connector is threadedly connected to the oil pipe coupling.
3. The wellhead pre-sealing mechanism for ropeway operation according to claim 1, characterized in that, The first sealing kit includes two first sealing pressure pads and multiple first sealing gaskets; one of the first sealing pressure pads, multiple first sealing gaskets and another first sealing pressure pad are sequentially sealed and installed in the inner cavity of the connector, and sequentially sealed and clamped to the rope, and the first sealing pressure pads and the first sealing gaskets are in tight contact.
4. The wellhead pre-sealing mechanism for ropeway operation according to claim 3, characterized in that, The first sealing gasket includes a first snap-fit block and a first snap-fit member, both made of metal. Both the first snap-fit block and the first snap-fit member are semi-circular structures, and the first snap-fit block is provided with a dovetail groove, while the first snap-fit member is provided with a locking block. The locking block is tenon-and-mortise connected to the dovetail groove, so that the first snap-fit block and the first snap-fit member together seal and clamp the rope.
5. The wellhead pre-sealing mechanism for ropeway operation according to claim 3, characterized in that, The first sealing gasket includes a first snap-fit block and a first snap-fit member, both made of rubber. Both the first snap-fit block and the first snap-fit member are semi-circular structures, and the first snap-fit block is provided with a dovetail groove, while the first snap-fit member is provided with a locking block. The locking block is tenon-and-mortise connected to the dovetail groove, so that the first snap-fit block and the first snap-fit member together seal and clamp the rope.
6. The wellhead pre-sealing mechanism for ropeway operation according to claim 1, characterized in that, The adjusting cylinder is threadedly connected to the connector.
7. The wellhead pre-sealing mechanism for ropeway operation according to claim 1, characterized in that, It also includes a second sealing kit; the second sealing kit is detachably and sealingly installed in the inner cavity of the adjusting cylinder for sealing the clamp to the rope; one end of the horn-shaped adjusting head extends into the adjusting cylinder and presses tightly against the second sealing kit.
8. The wellhead pre-sealing mechanism for ropeway operation according to claim 7, characterized in that, The second sealing kit includes two second sealing pressure pads and multiple second sealing gaskets; one of the second sealing pressure pads, multiple second sealing gaskets and another second sealing pressure pad are sequentially sealed and installed in the inner cavity of the adjusting cylinder, and sequentially sealed and clamped to the rope, and the second sealing pressure pads and the second sealing gaskets are in tight contact.
9. The wellhead pre-sealing mechanism for ropeway operation according to claim 8, characterized in that, The second sealing gasket includes a second snap-fit block and a second snap-fit component, both made of metal. Both the second snap-fit block and the second snap-fit component are semi-circular structures, with a dovetail groove on the second snap-fit block and a locking block on the second snap-fit component. The locking block is tenon-and-mortise connected to the dovetail groove so that the second snap-fit block and the second snap-fit component together seal and clamp the rope.
10. The wellhead pre-sealing mechanism for ropeway operation according to claim 8, characterized in that, The second sealing gasket includes a second snap-fit block and a second snap-fit component, both made of rubber. Both the second snap-fit block and the second snap-fit component are semi-circular structures, and the second snap-fit block is provided with a dovetail groove, while the second snap-fit component is provided with a locking block. The locking block is tenon-and-mortise connected to the dovetail groove, so that the second snap-fit block and the second snap-fit component together seal and clamp the rope.