A device for quick shut-in of a rope cable without cutting the rope and a method of using the same

Abstract

The present application belongs to the field of petroleum exploration and development engineering technology, and discloses a device for quick well closure without shearing rope cable and a use method thereof. The device comprises a guiding device, a hanging nipple, a second sealing nipple, a first sealing nipple, a second anti-jacking nipple and a first anti-jacking nipple which are sequentially fixed and connected from top to bottom and are provided with rope cable through holes in the axial direction. The hanging nipple is provided with a pressure injection port. The outer wall surface of the second sealing nipple is provided with a wellhead clamping device. The second sealing nipple and the first sealing nipple are both provided with grease injection pipelines, and the inlet end of the grease injection pipeline of the first sealing nipple is arranged above the wellhead clamping device. The grease injection pipeline is connected with an external grease injection lever during operation. The blowout prevention pressure of the present application reaches 70 MPa, and the well closure time during rope cable operation is greatly shortened from 10 minutes to less than 1 minute, so that the well closure operation can be completed, the efficiency and safety of emergency response are significantly improved, and equipment damage and operation interruption caused by rope cable cutting are avoided.

Description

Technical Field

[0001] This invention belongs to the field of petroleum exploration and development engineering technology, and relates to a device for rapid well shut-in without shearing the cable and its usage method. Background Technology

[0002] In oil exploration and development, logging, well testing, and downhole operations typically require the use of cables to lower special tools or instruments into the wellbore. Because these cables are not smooth on the outside and lack internal channels, it is impossible to shut in the well while the cable is intact in the event of a blowout; the cable must be cut to complete the shut-in operation. This current method of cutting the cable before shutting in involves multiple steps and takes more than 10 minutes to complete all procedures and shut in the well. It cannot meet the requirements for rapid shut-in after a blowout in a high-pressure, high-yield oil and gas well. Not only is the operation time-consuming and labor-intensive, but the prolonged shut-in time also puts significant pressure on the wellhead blowout preventer.

[0003] In the prior art, for example, Chinese invention patent CN114158550B, entitled "A Ropeline-Assisted Wellhead Blowout Prevention Device System", such as Figure 1 As shown, the system includes a blowout preventer (BOP) and a blowout preventer tube 1002 fitted at the bottom of the BOP 1001. The bottom of the BOP 1001 is embedded in one end of the blowout preventer tube 1002. The BOP 1001 includes a dynamic seal assembly 1003 and a static seal device 1004. One end of the drill collar short section 1006, which is annularly fitted at the bottom of the dynamic seal assembly 1003, is connected to the static seal device 1004 via a mechanical suspension short section 1005. The end of the static seal device 1004 furthest from the dynamic seal assembly 1003 is embedded in the blowout preventer tube 1002. The dynamic seal assembly is connected to the static seal device via the mechanical suspension short section to form the BOP. The formed BOP is connected to the blowout preventer tube. Thus, during high-pressure well construction, sealing grease is pumped into the dynamic seal assembly to form a high-pressure dynamic seal. When working with a pressurized cable at the wellhead, a high-pressure static seal can be achieved through the static seal device, thereby preventing the cable tip from being exposed and achieving emergency blowout prevention during cable work. However, in field use, there are still some problems such as only having one sealing component, which could lead to a blowout if the seal fails; the sealing section is too high on the drilling platform, making it inconvenient to shut in the well from the platform; the tool lacks an anti-overhead device, which could cause the tool to be pushed out of the wellhead after shutting in; and the lack of a centering and straightening device when the cable moves through the tool can cause internal wear and tear. Summary of the Invention

[0004] The purpose of this invention is to solve the technical problems of poor sealing performance and lack of anti-overhead device in the well shut-in blowout preventer in the existing technology under cable operation conditions, and to provide a device for quick well shut-in without cutting the cable and its usage method.

[0005] In a first aspect, the present invention provides a device for rapid well shut-in without shearing the cable, comprising a guide device having an axially arranged cable through hole and fixedly connected from top to bottom, a suspension short section, a second sealing short section, a first sealing short section, a second anti-overhead short section, and a first anti-overhead short section; the suspension short section is provided with an injection port; the outer wall surface of the second sealing short section is provided with a wellhead seat; both the second sealing short section and the first sealing short section are provided with grease injection lines, the inlet end of the grease injection line of the first sealing short section is located above the wellhead seat; the grease injection line is connected to an external grease injection skid during operation.

[0006] Further improvements are made in the following aspects: The guiding device includes two pulleys arranged opposite each other and movably connected to the side plate; the pulleys are provided with rope grooves in their circumference; the side plate is fixedly connected to the suspension section; during operation, the rope is placed between the two pulleys.

[0007] The suspension section includes a suspension section body, one end of which is provided with an internal threaded hole that mates with the lower end of the guide device; inside the suspension section body, starting from the end of the internal threaded hole, a clamping screw sleeve, a trigger sleeve anti-wear block, a collet, and a conical frame are sequentially fitted; a portion of the collet is disposed within the conical frame; an anti-wear block is disposed at the top of the fixing block within the trigger sleeve; a first injection port is disposed on the wall surface of the suspension section body at the contact end face of the clamping screw sleeve and the trigger sleeve, and a second injection port is disposed below the first injection port; a clamping screw is disposed at the bottom end of the conical frame on the wall surface of the suspension section body.

[0008] A one-way valve is provided at the first injection port.

[0009] The second sealing section and the first sealing section are hydraulic sealing structures.

[0010] The second sealing section includes a second sealing body, in which a packing housing is coaxially disposed. A pressure block and a clamping sleeve are disposed within the packing housing, and a cable passes through the pressure block and clamping sleeve during operation. Packing injection ports are provided on the walls of the second sealing body and the packing housing. The clamping sleeve is made of a plastic material. Thick grease injection ports and thin grease injection ports are provided on the walls of the second sealing body. A flow-blocking tube is also disposed inside the second sealing body.

[0011] The second anti-overhead short section is connected to the first anti-overhead short section by a threaded connection, and an anti-overhead sealing element is provided on the connection surface; the bottom end of the first anti-overhead short section is provided with an anti-overhead large end, and the stepped surface of the anti-overhead large end hangs on the gate seal of the blowout preventer when working, in order to prevent the high pressure fluid in the well from being pushed up and rushed out of the wellhead.

[0012] The wellhead mounting bracket includes a first load-bearing plate that is placed on the drilling platform during operation. Several adjusting screws are provided on the upper surface of the first load-bearing plate, and each adjusting screw is provided with an adjusting nut. A second load-bearing plate is provided above the adjusting screw and the adjusting nut. An opening is provided at the relative position of the first load-bearing plate and the second load-bearing plate for fixing the second sealing section.

[0013] The guide device, suspension section, second sealing section, first sealing section, second anti-top-out section and first anti-top-out section are sequentially fixedly connected from top to bottom by threads.

[0014] In a first aspect, the present invention provides a method of using the above-mentioned non-cutting cable rapid well shut-in device, comprising: Step 1: Pass the rope through the guide device, suspension section, second sealing section, first sealing section, second anti-top section and first anti-top section in sequence, and then assemble them. Step 2: Connect the grease injection line to the external grease injection skid and perform a pressure test; after the pressure test is completed, the external grease injection cylinder needs to be removed and refilled with sealant. Step 3: Place the device for quick shut-in of the well without cutting the cable at the wellhead and connect it to the blowout preventer; connect the grease injection line to the external grease injection skid, and then lower the cable normally to carry out the operation; Step 4: Upon receiving the overflow alarm, immediately stop the rope lowering, pressurize the suspension section to activate the rope suspension; open the external grease injection skid, adjust the grease injection pressure, and achieve a static seal; Step 5: Turn off the blowout preventer.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This invention discloses a device for rapid well shut-in without cutting the cable. By incorporating a suspension section, the device allows for maintaining the integrity of the cable in emergencies such as overflows, enabling rapid well shut-in operations without cable cutting. This significantly improves the efficiency and safety of emergency response, avoiding equipment damage and operational interruptions that could result from cable cutting. The device includes a second and a first sealing section, equipped with a grease injection line for external grease injection via a grease injection skid. This design ensures the reliability and stability of the sealing structure, effectively preventing fluid leakage within the well, thereby improving the success rate and safety of well shut-in operations. Through optimized structural design, the device effectively reduces the overall height of the sealing section while maintaining sealing performance. This not only reduces the space occupied by the device within the well but also improves operational flexibility and convenience, providing greater convenience for subsequent downhole operations. The device is equipped with a second and a first anti-overhead section, which effectively prevents potential overheading during the well shut-in process, ensuring the smooth progress of the well shut-in operation and the safety of equipment within the well. This invention provides a blowout preventer with a pressure of 70 MPa, which significantly reduces the shut-in time during cable operations from 10 minutes to less than 1 minute.

[0016] Furthermore, the bottom end of the first anti-blowout short section is provided with an anti-blowout large end. When working, the stepped surface of the anti-blowout large end is hung on the gate seal of the blowout preventer. It can be combined with the gate blowout preventer and use the braking force of the gate blowout preventer after the well is closed to prevent the single blowout preventer from rushing out of the wellhead.

[0017] This invention discloses a method for using a device for rapid well shut-in without shearing the cable. During use, pressure testing and refilling of sealing grease are performed by connecting an external grease injection skid, ensuring the reliability and stability of the sealing structure. Upon receiving an overflow alarm, the suspension mechanism can be quickly activated and the grease injection pressure adjusted to achieve a static seal, effectively preventing fluid leakage from the well and ensuring operational safety. In the event of an emergency such as an overflow, this method can quickly stop the cable descent, activate the suspension mechanism, and achieve a static seal by adjusting the grease injection pressure, thereby quickly closing the wellhead. This feature significantly reduces the risk of accidents and minimizes potential equipment damage and personnel injuries caused by overflows. The application of this method not only improves operational efficiency but also significantly enhances emergency response capabilities. In emergencies, operators can quickly and accurately complete the well shut-in operation, effectively responding to various unforeseen events and improving the overall operational level. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a wellhead blowout prevention device system in the prior art; Figure 2 This is a schematic diagram of the overall structure of a device for rapid well shut-in without shearing the cable according to the present invention. Figure 3 This is a front view of the guide device of a quick well shut-in device without shearing the cable according to the present invention; Figure 4 This is a cross-sectional view of the guide device of a quick well shut-in device without shearing the cable according to the present invention. Figure 5 This is a cross-sectional view of the suspension section of a device for rapid well shut-in without shearing the cable, as described in this invention. Figure 6 This is a cross-sectional view of the second sealing section of a device for rapid well shut-in without shearing a cable, according to the present invention. Figure 7 This is a cross-sectional view of the first sealing section of a device for rapid well shut-in without shearing a cable, as described in this invention. Figure 8 This is a schematic diagram of the wellhead mounting mechanism of a device for rapid well shut-in without shearing the cable, as described in this invention. Figure 9 This is a schematic diagram of the combination of the second anti-uplift device and the first anti-uplift device in a device for rapid well shut-in without cutting the cable according to the present invention. Figure 10 This is a schematic diagram illustrating the operation and installation of a device for rapid well shut-in without cutting the cable, as described in this invention.

[0020] Wherein: 1001-Blowout preventer; 1002-Blowout preventer body; 1003-Dynamic seal assembly; 1004-Static seal device; 1005-Mechanical suspension sub; 1006-Drill collar sub; 1-Guide device; 101-Bearing; 102-Side plate; 103-Pulley shaft; 104-Nut; 105-Guard plate; 106-Threaded head; 107-Pulley; 108-Wear-resistant sleeve; 2-Suspension sub; 201-Suspension sub body; 202-Pressure sleeve; 203-Trigger sleeve; 204-Check valve; 205-First injection port; 206-Second injection port; 207-Wear-resistant block; 208-Fixing block; 20 9-Slipper; 210-Conical frame; 211-Clamping screw; 212-Steel ball; 213-First suspension seal; 214-Second suspension seal; 215-Cylindrical compression spring; 216-Third suspension seal; 217-Fourth suspension seal; 218-Fifth suspension seal; 3-Second sealing stub; 301-Package housing; 302-First seal; 303-Pressure block; 304-Clamping sleeve; 305-Second upper sealing head; 306-Second seal; 307-Second sealing body; 308-Second upper housing; 309-Tube ferrule; 310-Third seal; 311-Intermediate joint; 312 - Connecting short section; 313- Second flow-blocking tube; 314- Pressure cap; 315- Second locking ring; 316- Packing injection port; 317- Thick grease injection port; 318- Thin grease injection port; 319- Upper connector; 320- Lower connector; 321- Grease injection line; 322- Grease injection line sheath; 4- Wellhead seat clamp; 401- Adjusting screw; 402- Second load-bearing plate; 403- Adjusting nut; 404- First load-bearing plate; 5- First sealing short section; 501- First sealing body; 502- First upper sealing head; 503- First upper shell; 504- First flow-blocking tube; 505- First locking ring; 506- Fourth seal Components; 507-Transition joint; 508-Connecting joint; 509-Blocking tube housing; 510-Flanged blocking tube; 511-Ball seat; 512-Fifth seal; 513-Sixth seal; 514-Seventh seal; 515-Tubing ferrule; 516-Pipeline cap; 517-Grease injection line interface; 6-Second anti-blowout stub; 601-Anti-blowout seal; 7-First anti-blowout stub; 701-Anti-blowout large end; 8-Head pulley; 9-Blowout preventer; 10-Wellhead four-way; 11-Hydraulic line; 12-Ropeline working equipment; 13-Ground; 14-Ground pulley; 15-Integrated grease injection skid; 16-Gas source. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0023] 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.

[0024] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention 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, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it 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.

[0026] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 the present invention according to the specific circumstances.

[0027] The present invention will now be described in further detail with reference to the accompanying drawings: See Figure 2This invention discloses a device for rapid well shut-in without shearing the cable, comprising a guide device 1 with an axially arranged cable through hole and fixedly connected from top to bottom, a suspension section 2, a second sealing section 3, a first sealing section 5, a second anti-overhead section 6, and a first anti-overhead section 7; the suspension section 2 is provided with an injection port; the outer wall surface of the second sealing section 3 is provided with a wellhead seat 4; both the second sealing section 3 and the first sealing section 5 are provided with grease injection lines, with the inlet end of the grease injection line of the first sealing section 5 located above the wellhead seat 4; the grease injection line is connected to an external grease injection skid during operation. The guide device 1, suspension section 2, second sealing section 3, first sealing section 5, second anti-overhead section 6, and first anti-overhead section 7 are fixedly connected from top to bottom by threads. The suspension section 2 is used in emergencies during cable operation, enabling rapid hydraulic suspension of the cable in emergencies, and hydraulic reset can be activated after the risk is eliminated to quickly release the suspension. A one-way valve installed at the upper oil injection port can prevent excessive pressure at the lower part from causing the suspended cone to shift upwards and the cable to fall into the well. Copper anti-wear blocks are installed at both ends of the cone to center the cable and reduce cable wear. The second sealing section 3 and the first sealing section 5 are for emergency use in case of emergency during cable operation. They can be quickly sealed in an emergency by injecting grease with a grease pump. The second sealing section 3 and the first sealing section 5 adopt a segmented grease injection structure. The lower grease injection port connects to the gap between the flow control tube and the outer shell of the flow control tube. After extending downwards by two lengths of flow control tube, it connects to the inner hole of the flow control tube through a connecting joint. The upper grease injection port directly connects to the center hole of the flow control tube. The second anti-blowout section 6 and the first anti-blowout section 7 are connected by threads. The length can be adjusted as needed so that the stepped surface of the first anti-blowout section 7 is exactly at the gate sealing core of the wellhead semi-sealed gate blowout preventer.

[0028] This invention discloses a device for rapid well shut-in without cutting the cable. By incorporating a suspension section, the device allows for maintaining the integrity of the cable in emergencies such as overflows, enabling rapid well shut-in operations without cable cutting. This significantly improves the efficiency and safety of emergency response, avoiding equipment damage and operational interruptions that could result from cable cutting. The device includes a second and a first sealing section, equipped with a grease injection line for external grease injection via a grease injection skid. This design ensures the reliability and stability of the sealing structure, effectively preventing fluid leakage within the well, thereby improving the success rate and safety of well shut-in operations. Through optimized structural design, the device effectively reduces the overall height of the sealing section while maintaining sealing performance. This not only reduces the space occupied by the device within the well but also improves operational flexibility and convenience, providing greater convenience for subsequent downhole operations. The device is equipped with a second and a first anti-overhead section, which effectively prevents potential overheading during the well shut-in process, ensuring the smooth progress of the well shut-in operation and the safety of equipment within the well. This invention provides a blowout preventer with a pressure of 70 MPa, which significantly reduces the shut-in time during cable operations from 10 minutes to less than 1 minute.

[0029] See Figure 3 and Figure 4 The guide device 1 includes two pulleys 107 arranged opposite each other and movably connected to the side plate 102; the pulleys are provided with rope grooves in their circumference; the side plate 102 is fixedly connected to the suspension section 2; during operation, the rope is placed between the two pulleys 107. The guide device 1 mainly consists of two pulleys arranged opposite each other, fixed to the side plate 102 by roller fixing pins, and the side plate 102 is fixed as a whole to the threaded head 106. In use, the guide device is connected to the lower suspension section 2 by threads, and the joint has a side groove in the middle, which can easily place the rope between the two. When the rope moves up and down, placing the rope between the two pulleys ensures that the rope is always centered and prevents wear on the internal structure of the suspension section and the sealing section.

[0030] See Figure 5The suspension section 2 includes a suspension section body 201. One end of the suspension section body 201 is provided with an internal threaded hole that mates with the lower end of the guide device 1. Inside the suspension section body 201, starting from the end of the internal threaded hole, a clamping screw sleeve 202, a trigger sleeve 203, an anti-wear block 207, a clip 209, and a cone frame 210 are sequentially fitted. The clip 209 is partially disposed in the cone frame 210. The anti-wear block 207 is disposed at the top of the fixing block 208 in the trigger sleeve 203. A first injection port 205 is disposed on the wall surface of the suspension section body 201 at the contact end face of the clamping screw sleeve 202 and the trigger sleeve 203. A second injection port 206 is disposed below the first injection port 205. A one-way valve 204 is disposed at the first injection port 205. A clamping screw 211 is disposed at the bottom end of the cone frame 210 on the wall surface of the suspension section body 201. The suspension sub 2 is used in emergencies during cable operations. It allows for rapid hydraulic suspension of the cable in case of an emergency, and hydraulic reset can be initiated after the risk is eliminated to quickly release the suspension. A one-way valve 204 installed at the first injection port 205 prevents excessive lower pressure from causing the suspension cone to shift upwards and the cable to fall into the well. Copper anti-wear blocks are installed at both ends of the cone to center the cable and reduce cable wear. During normal cable logging, the cable moves freely through the suspension sub. When cable suspension is required, cable movement is stopped, and pressure is applied from the first injection port 205, pushing the trigger sleeve 203 downwards. This moves the anti-wear block 207, fixing block 208, and slip 209 downwards along the cone surface, thus gripping the cable and suspending it. When cable release is required, pressure is applied from the second injection port 206, pushing the trigger sleeve 203 upwards. This moves the anti-wear block 207, fixing block 208, and slip 209 upwards along the cone surface, thus releasing the cable.

[0031] See Figure 6 and Figure 7The second sealing section 3 and the first sealing section 5 are hydraulic sealing structures. The second sealing section 3 includes a second sealing body 307, in which a packing housing 301 is coaxially disposed. The packing housing 301 contains a pressure block 303 and a clamping sleeve 304, through which a cable passes during operation. Packing injection ports 316 are provided on the walls of the second sealing body 307 and the packing housing 301. The clamping sleeve 304 is made of plastic material. Thick grease injection ports 317 and thin grease injection ports 318 are provided on the walls of the second sealing body 307. A flow-blocking tube 313 is also provided inside the second sealing body 307. The uppermost end of the second sealing section 3 is a female connector for connecting to the suspension section. The lowermost end is a male connector for connecting to the first sealing section 5. The sealing operation principles of the second sealing section 3 and the first sealing section 5 are the same. However, to reduce the height of the entire tool set on the drill platform after installation, the sealing sub 1 must be placed below the drill platform surface. An additional grease injection line interface 517 allows the grease injection line 321, extending to the drill platform surface, to be connected. By pressing down and opening the line cap 516, the grease injection and pressure testing line can be connected from the drill platform surface, allowing for pressure testing and grease injection of the sealing sub 1 to tighten the seal and achieve a seal. During normal cable logging, the cable travels freely through the second sealing sub 3. When sealing the cable is required, cable movement is stopped, and pressure is injected through the packing injection port 316, causing the pressure block 303 and the clamping sleeve (rubber material) to contract inward, tightening the cable and achieving a seal. Simultaneously, thick grease and thin grease are injected through the thick grease injection port 317 and the thin grease injection port 318, respectively, to help seal the gaps between the cable and the sub and the minute gaps between the steel wires in the cable body, thereby achieving a pressure-bearing seal. The two grease injection ports have mounting brackets at their lower parts. In emergencies, the tool can be lowered to the wellhead and secured to the drilling platform using the brackets. At this time, the height of the drilling platform from the top of the upper suspended sub is less than 1.5 meters. The injected thick and thin grease will flow into the choke pipe. The lower outer side of the second sealing sub 3 has a grease injection line 321 extending from the first sealing sub 5. This allows the sealing sub body to be placed below the drilling platform, thereby reducing the height of the entire tool set on the drilling platform during use and facilitating wellhead shut-in, pressurization, and subsequent connection of kill tools. A grease injection line sheath 322 is installed outside the extended grease injection line 321 to protect it from impact during tool tripping.

[0032] See Figure 9The second anti-uplift short section 6 is connected to the first anti-uplift short section 7 by a threaded connection, and an anti-uplift sealing element 601 is provided on the connecting surface. The bottom end of the first anti-uplift short section 7 is provided with an anti-uplift large end 701. The stepped surface of the anti-uplift large end 701 hangs on the gate seal of the blowout preventer during operation to prevent the entire set of high-pressure fluid in the well from being pushed up and blown out of the wellhead. In order to prevent the entire set of tools from being pushed out of the wellhead by the high-pressure fluid in the well after the well is shut in, an anti-uplift device is provided, which works in conjunction with the wellbore gate blowout preventer to effectively prevent uplift. The connecting joint is connected to the upper first sealing short section 5 through the upper female joint, and to the anti-uplift large end 701 through the lower male joint. The stepped surface of the anti-uplift large end 701 can hang on the gate seal of the half-sealed gate blowout preventer of the drilling rig, thereby preventing the entire set of high-pressure fluid in the well from being pushed up and blown out of the wellhead.

[0033] See Figure 8 The wellhead mounting bracket 4 includes a first load-bearing plate 404 that rests on the drill platform during operation. Several adjusting screws 401 are mounted on the upper surface of the first load-bearing plate 404, each with an adjusting nut 403. A second load-bearing plate 402 is positioned above the adjusting screws 401 and the adjusting nut 403. An opening is provided at the relative position of the first load-bearing plate 404 and the second load-bearing plate 402 for fixing the second sealing section 3. A wellhead mounting bracket is designed to facilitate adjustment of the height of the portion above the sealing section 2 above the drill platform. The wellhead mounting bracket is height-adjustable. The first load-bearing plate 404 rests on the drill platform, and the second load-bearing plate 402 supports the second sealing section 3 and the tools above it above the drill platform. By adjusting the nut 403, the second load-bearing plate 402 can move up and down along the adjusting screws 401, thereby allowing the entire tool set to be positioned at a suitable fixed height above the drill platform.

[0034] See Figure 10 The present invention also discloses a method of using a device for rapid well shut-in without cutting the cable, comprising: Step 1: Pass the rope through the guide device 1, suspension section 2, second sealing section 3, first sealing section 5, second anti-top section 6 and first anti-top section 7 in sequence, and then assemble them. Step 2: Connect the grease injection line to the external grease injection skid and perform a pressure test; after the pressure test is completed, the external grease injection cylinder needs to be removed and refilled with sealant. Step 3: Place the device for quick shut-in of the well without cutting the cable at the wellhead and connect it to the blowout preventer; connect the grease injection line to the external grease injection skid, and then lower the cable normally to carry out the operation; Step 4: Upon receiving the overflow alarm, immediately stop the rope lowering, pressurize the suspension section 2 to start the rope suspension; open the external grease injection skid, adjust the grease injection pressure, and achieve static sealing; Step 5: Turn off the blowout preventer.

[0035] This invention discloses a method for using a device for rapid well shut-in without shearing the cable. During use, pressure testing and refilling of sealing grease are performed by connecting an external grease injection skid, ensuring the reliability and stability of the sealing structure. Upon receiving an overflow alarm, the suspension mechanism can be quickly activated and the grease injection pressure adjusted to achieve a static seal, effectively preventing fluid leakage from the well and ensuring operational safety. In the event of an emergency such as an overflow, this method can quickly stop the cable descent, activate the suspension mechanism, and achieve a static seal by adjusting the grease injection pressure, thereby quickly closing the wellhead. This feature significantly reduces the risk of accidents and minimizes potential equipment damage and personnel injuries caused by overflows. The application of this method not only improves operational efficiency but also significantly enhances emergency response capabilities. In emergencies, operators can quickly and accurately complete the well shut-in operation, effectively responding to various unforeseen events and improving the overall operational level.

[0036] The working process of this invention is as follows: (1) Before going up the well: Confirm the specifications of the rope used in the rope operation, and ensure that the rope is free of broken wires, burrs, and twists. Check that the specifications of the suspension short section, static sealing short section and related sealing and suspension components are consistent with the specifications of the rope used. Confirm the specifications of the casing hanger of the working well and the height of the casing hanger from the wellhead. Match the corresponding model of anti-overhead joint and the corresponding length of anti-overhead short section of the casing hanger from the wellhead and the height.

[0037] (2) After the well is brought up, the cable logging team and other cable operation teams shall place the logging vehicle, install the pulleys, thread the working cable, hoist the cable logging instrument to the wellhead and assemble it in accordance with the normal cable logging procedure requirements. The logging instrument shall be placed at the wellhead using a special hoisting bracket. (3) Cut the rope at the bridle and pull the end of the rope from the drilling platform to the catwalk on the ground drilling platform; (4) Pass the rope through the suspension section, sealing section, and anti-overhead section respectively, and then assemble the suspension section, sealing section, and anti-overhead section. (5) Install the external grease injection cylinder and pressure test connector to check the reverse pressure bearing function; after the test is completed, the external grease injection cylinder needs to be removed and refilled with sealant. (6) At the front end of the rope, make a horse bridle on site and fix the horse bridle to the bottom of the single blowout preventer. (7) Lifting the cable blowout preventer assembly onto the drilling platform; use the drilling team's small winch (pneumatic winch) to lift the cable blowout preventer assembly to the wellhead of the drilling platform (use open-end lifting wire to avoid damaging the cable). The drilling platform should ensure that the traction tail rope is tied to the bottom of the blowout preventer assembly. Lift the cable blowout preventer assembly to a suitable height (pull out the bridle from the bottom) and secure the tail rope. During the lifting of the cable blowout preventer assembly, pay attention to the uniform speed operation and the condition of the cable during the lifting process. The logging winch should be operated accordingly to avoid breakage or twisting.

[0038] (8) Keep the rope blowout preventer assembly fixed, pull down the horse bridle, connect the instrument string, power on to test and lower it 30 meters (ensure that the rope blowout preventer assembly can be lowered to the required distance). (9) The cable blowout preventer assembly is lowered to the wellhead, the hoist is set, and the corresponding pipeline of the blowout preventer assembly is connected; ① Release the anchor rope of the blowout preventer assembly and lower the single blowout preventer cable into the well (guide it with the anchor rope during the lowering process to avoid bumping the wellhead). Place the hoist at the wellhead position and hang the lower diameter change section of the anti-static seal short section onto the hoist. ② Install the external grease injection cylinder to the corresponding interface of the suspension short section and the static sealing short section; ③ Connect the hydraulic control line and the grease injection line; ④ Check whether the cable blowout preventer assembly is functioning properly. After confirming that everything is correct, shut off the blowout preventer and seal the individual blowout preventer strands. (10) Lower the rope normally and carry out normal rope operation; (11) Suspension and sealing ① The logging truck winch normally lowers the logging cable. When an overflow alarm is received, the lowering of the cable should be stopped immediately. ② Move the three-position four-way directional valve of the ground grease injection skid to the "start suspension" position, observe the suspension pressure value, keep it above 20MPa, then slowly lower the logging winch until the cable is completely loosened, and then move the three-position four-way directional valve to the middle position. ③ Open the sealing switch of the integrated grease injection skid, start the grease injection pump, and adjust the grease injection pressure to achieve a static seal; ④ The driller should immediately shut off the blowout preventer; ⑤ During the pressure stabilization phase, record the sealing pressure and grease injection pressure every 15 minutes, and replenish the pressure promptly if it is insufficient.

[0039] (12) Tool reset ① Turn off the grease pump, open the pressure relief valve of the control circuit and the grease injection circuit to release the internal pressure of the sealing short section, and then close the sealing switch; slowly raise the logging winch until the cable is just taut. ② Move the three-position four-way directional valve to the "unsuspension" position and slowly increase the control pressure to 70MPa (ensure the suspension is fully open). ③ The logging operator controls the winch to slowly raise the cable first, and then slowly lower the cable until the instrument can continue to be lowered (because the sealant has high viscosity, the cable lowering resistance is large, and there is still a certain pressure inside the tool after depressurization, so it is necessary to repeatedly raise and lower the cable to remove the sealant and thus release the pressure and reduce the resistance).

[0040] (13) Tool disassembly ① The logging operator controls the winch to slowly raise the cable. After confirming that the suspension has been released, the operator closes the grease injection skid suspension control pressure and the driller opens the blowout preventer. ② The internal and external fitters connect the pneumatic winch hook to the guide pulley. The assistant driller operates the small winch to lift the cable tool string 50mm, moving it up and down 2-3 times to confirm that the tool is securely hoisted. Then, the wellhead lifting clamp is removed. The assistant driller controls the pneumatic winch to lift the cable tool to a position 2m above the drilling platform and fix it. The winch brake is then engaged. The internal and external fitters attach the tail rope to the tool and secure it. Then, the logging winch lifts the cable to raise the logging instrument to the wellhead. The logging instrument is then seated at the wellhead using a special logging clamp. ③ The logging personnel disassembled the bridle at the wellhead, and the logging tool string was separated from the cable. The internal and external fitters, together with the assistant driller, used a pneumatic winch to lift the cable operation overflow quick shut-in tool to the catwalk on site. During the lifting process, the logging vehicle cooperated with the cable to lower it, ensuring that the bridle was in the position of extending below the blowout preventer throughout the entire lifting process. ④ The logging personnel removed the horse bridle and took out the rope on the catwalk platform at the well site, and then disassembled the tool string in sequence; ⑤ The assistant driller uses a pneumatic winch to hoist the logging instrument string from the wellhead to the site ramp. The logging personnel then dismantle the logging tool string, pulleys, and other on-site equipment to complete the operation.

[0041] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A device for rapid well shut-in without shearing the cable, characterized in that, The device includes a guide device (1) with a cable through hole arranged axially and fixedly connected from top to bottom, a suspension short section (2), a second sealing short section (3), a first sealing short section (5), a second anti-overhead short section (6), and a first anti-overhead short section (7); the suspension short section (2) is provided with an injection port; the outer wall of the second sealing short section (3) is provided with a wellhead seat (4); both the second sealing short section (3) and the first sealing short section (5) are provided with grease injection lines, and the inlet end of the grease injection line of the first sealing short section (5) is located above the wellhead seat (4); the grease injection line is connected to an external grease injection skid when working.

2. The device for rapid well shut-in without shearing the cable according to claim 1, characterized in that, The guiding device (1) includes two pulleys (107) that are arranged opposite to each other and movably connected to the side plate (102); the pulleys are provided with rope grooves in the circumference; the side plate (102) is fixedly connected to the suspension section (2); during operation, the rope is placed between the two pulleys (107).

3. The device for rapid well shut-in without shearing the cable according to claim 1, characterized in that, The suspension section (2) includes a suspension section body (201), one end of which is provided with an internal threaded hole that mates with the lower end of the guide device (1); inside the suspension section body (201), from the end of the internal threaded hole, a clamping screw sleeve (202), a trigger sleeve (203), an anti-wear block (207), a slip (209), and a cone frame (210) are sequentially fitted; a portion of the slip (205) is disposed in the cone frame (210); the trigger sleeve (203) 03) A wear-resistant block (207) is provided at the top of the fixed block (208); a first injection port (205) is provided on the wall surface of the suspension short section body (201) at the contact end face of the clamping screw sleeve (202) and the trigger sleeve (203), and a second injection port (206) is provided below the first injection port (205); a clamping screw (211) is provided at the bottom end of the cone frame (210) on the wall surface of the suspension short section body (201).

4. The device for rapid well shut-in without shearing the cable according to claim 1, characterized in that, A one-way valve (204) is provided at the first injection port (205).

5. The device for rapid well shut-in without shearing the cable according to claim 1, characterized in that, The second sealing section (3) and the first sealing section (5) are hydraulic sealing structures.

6. The device for rapid well shut-in without shearing the cable according to claim 5, characterized in that, The second sealing section (3) includes a second sealing body (307), in which a packing shell (301) is coaxially disposed. A pressure block (303) and a clamping sleeve (304) are disposed in the packing shell (301). During operation, a cable passes through the pressure block (303) and the clamping sleeve (304). A packing injection port (316) is disposed on the wall surface of the second sealing body (307) and the packing shell (301). The clamping sleeve (304) is made of plastic material. A thick grease injection port (317) and a thin grease injection port (318) are disposed on the wall surface of the second sealing body (307). A flow-blocking tube (313) is also disposed inside the second sealing body (307).

7. The device for rapid well shut-in without shearing the cable according to claim 1, characterized in that, The second anti-blowout short section (6) is connected to the first anti-blowout short section (7) by threaded connection, and an anti-blowout sealing element (601) is provided on the connection surface; the bottom end of the first anti-blowout short section (7) is provided with an anti-blowout large end (701), and the stepped surface of the anti-blowout large end (701) is hung on the gate seal of the blowout preventer when working, so as to prevent the high pressure fluid in the well from blowing out of the wellhead.

8. The device for rapid well shut-in without shearing the cable according to claim 1, characterized in that, The wellhead mounting bracket (4) includes a first load-bearing plate (404) placed on the drilling platform during operation. Several adjusting screws (401) are provided on the upper surface of the first load-bearing plate (404). Each adjusting screw (401) is provided with an adjusting nut (403). A second load-bearing plate (402) is provided above the adjusting screw (401) and the adjusting nut (403). An opening is provided at the relative position of the first load-bearing plate (404) and the second load-bearing plate (402) for fixing the second sealing section (3).

9. The device for rapid well shut-in without shearing the cable according to claim 1, characterized in that, The guide device (1), suspension section (2), second sealing section (3), first sealing section (5), second anti-top-out section (6) and first anti-top-out section (7) are connected sequentially from top to bottom by threaded fasteners.

10. A method of using the device for rapid well shut-in without shearing the cable as described in any one of claims 1-9, characterized in that, include: Step 1: Pass the rope through the guide device (1), suspension section (2), second sealing section (3), first sealing section (5), second anti-top section (6) and first anti-top section (7) in sequence, and then assemble them. Step 2: Connect the grease injection line to the external grease injection skid and perform a pressure test; after the pressure test is completed, the external grease injection cylinder needs to be removed and refilled with sealant. Step 3: Place the device for quick shut-in of the well without cutting the cable at the wellhead and connect it to the blowout preventer; connect the grease injection line to the external grease injection skid, and then lower the cable normally to carry out the operation; Step 4: Upon receiving the overflow alarm, immediately stop lowering the rope and pressurize the suspension section (2) to start the suspension of the rope; open the external grease injection skid, adjust the grease injection pressure, and achieve static sealing; Step 5: Turn off the blowout preventer.

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