Hydraulic hole opener, system, applications, and method for establishing a circulation path in a super deep well pipe string

Abstract

The application discloses a hydraulic perforator, a system, an application and a method for establishing a circulation channel of a pipe string in an ultra-deep well, and comprises a joint, a perforator body, an impact component, a sealing plug, a first piston and a punch rod. The joint is provided with a hollow channel, and one end of the joint is detachably connected with the perforator body. The perforator body is provided with a first channel, an oil storage chamber and a second channel which are sequentially communicated, and a blind hole which is communicated with the second channel is formed in the side surface of the perforator body. The impact component is located in the hollow channel or the first channel. The sealing plug is located in the first channel and is used for sealing the first channel. The first piston is located in the first channel, the oil storage chamber is pre-stored with hydraulic oil, and the punch rod is located in the blind hole. Under the action of a wellbore liquid column, the impact component impacts the sealing plug, so that the wellbore liquid column acts on the first piston after the sealing plug is broken, the first piston slides in the first channel to extrude the hydraulic oil in the oil storage chamber, the hydraulic oil acts on the punch rod through the second channel, and the punch rod penetrates the target pipe string.

Description

Technical Field

[0001] This invention relates to the field of oil extraction technology, and in particular to a hydraulic wellhead, system, application, and method for establishing circulation channels in ultra-deep well tubing. Background Technology

[0002] In the exploration and development of deep and ultra-deep wells, as well depth increases, well conditions and operating conditions become increasingly severe, making well completion and workover increasingly difficult. To reduce the number of tubing runs and pulls in deep and ultra-deep wells and to avoid secondary pollution of the oil reservoir by high-density kill fluid after perforation, integrated completion tubing strings are typically selected for deep and ultra-deep wells. For some wells, due to construction safety considerations, circulation channels cannot be directly established in the completion tubing. Later, when well blockage occurs due to formation sand, wax, or scaling, or when well production is stopped due to tool malfunctions, tubing runs are required. Before running the tubing, flushing and killing the well is an essential procedure. Conventional kill methods include circulation kill, injection kill, and squeeze kill. Regardless of the kill method, it is necessary to find a channel on the tubing string, establish a hydrostatic column, release the trap pressure, and balance the formation pressure.

[0003] In the process of oilfield field operations, the following three methods are often used to establish circulation channels according to different well completion methods: (1) Mechanical drilling is a method of drilling using mechanical equipment. Usually, a traction drill or other special mechanical tools are used to drill, or a wire hydraulic drill is used. After the drill is lowered to a predetermined depth by the wire, the locking pin is cut off by the wire operation, the punch is released, and the punch gradually slides out of the body and anchors on the tubing wall under the push of the wedge groove. Then, the punch is continuously impacted by the wire being lifted until the tubing wall is pierced to form a hole. (2) Hydraulic jet drilling is a method of drilling pipes using high-pressure water jet. Under certain hydraulic conditions, high-pressure water carries abrasive, and the jet penetrates the pipe wall to form a hole. (3) Using perforation technology, the perforating gun is lowered to a predetermined position through the coiled tubing. When the gunpowder explodes, it will jet through the casing wall and cement layer at extremely high speed and temperature along the center of the conical surface, and then penetrate the tubing string.

[0004] The patent application CN103696734A, entitled "Differential Pressure Relief Valve for Marine Deep Well Tubing," describes a differential pressure relief valve for marine deep well tubing. The valve includes an upper connector, a sleeve, a central tube, a one-way seal, a limiting ring, a spring, and a lower connector. The central tube is threadedly connected to and seals the upper and lower connectors. The sleeve is threadedly connected to the upper connector. The limiting ring is fixed to the middle of the central tube by a pin. The one-way seal is mounted on the central tube. The spring is sleeved on the central tube, located between the one-way seal and the lower connector. The central tube has a first valve port at its upper part and a second valve port at its middle part. The first valve port is located between the upper connector and the limiting ring, connecting the inside of the tubing to the annular space. The second valve port is located at the lower part of the limiting ring. This invention features a simple structure and convenient maintenance. The pressure required to connect or close the tubing can be controlled by changing the spring force. It provides continuous pressure relief when the tubing is lifted, eliminating concerns about excessive pressure inside the tubing due to lifting.

[0005] The patent application with publication number CN107893640A, entitled "A Downhole Pipe Drilling Tool," describes a method where a piston is axially sealed and positioned on the upper part of the main body via a shear pin. An axial sliding seal is formed between the upper part of the cone and the inner concave platform of the main body. A drilling block is fixed to the lower part of the main body via a pin. The main body, piston, and cone form a closed cavity. The main body has pressure guiding holes and drilling block slots. The lower working surface of the cone is a wedge-shaped or conical structure. When the pin is radially aligned with the main body, the drilling block rotates axially. With the pin axially installed, the drilling block can rotate radially. This method involves simply inserting the downhole pipe drilling tool into the pipe string, or using cable, wireline, or coiled tubing methods to lower the tool to a certain depth within the downhole pipe string. Pressure is then applied from within the pipe string to achieve drilling or cutting. Compared to cable and coiled tubing methods, this method is simpler, safer, and reduces operating costs, representing a breakthrough in downhole pipe drilling or cutting technology.

[0006] The article "Application Research of Hydraulic Tubing Drilling Tool in Andean Oilfields," published by China Petroleum and Chemical Standards and Quality, describes a hydraulic wireline tubing drilling process. This process involves lowering a hydraulic wireline tubing drill into the well using a steel wire, positioning it at any point inside the tubing, and then mechanically triggering a propellant to release kinetic energy, thus drilling a hole in the tubing and establishing a connection between the tubing and casing. This technology is primarily applied to flowing wells in highly deviated heavy oil reservoirs containing low-corrosive fluids and to artificially lifted production tubing strings (various sizes of EUE tubing, such as N80 and L80). This tubing drilling process is characterized by high efficiency, low cost, and high success rate, and has been widely used in the Andean oilfields of Ecuador.

[0007] The paper "Application Research of Tubing Perforators in Offshore Oil and Gas Fields" published by Petrochemical Technology reveals that the tubing perforators currently used in offshore oil and gas fields are mainly mechanical tubing perforators manufactured by PCE. These perforators rely on the up-and-down movement and impact of a wireline to drill holes in the tubing. The tool consists of two parts: a perforation locator and the tubing perforator itself. The main function of the perforation locator is to provide a lower support point for the tubing perforator. When the perforation head pops out of the tubing perforator body but drilling fails, and the tubing perforator cannot be lifted normally, the tubing perforator is lowered to the perforation locator and impacted downwards to shear the lower pin of the tubing perforator. After the pin is sheared, the perforation head can be retracted and locked. At this point, the perforator can be pulled out of the wellhead, inspected and maintained, and the drilling depth verified before being lowered back in for drilling. The perforation locator is mainly supported to the inner wall of the tubing by a sliding locking device, providing support. The deployment depth of the perforation locator must be greater than the intended drilling depth. The drilling principle of the tubing drill is that as the steel wire is lifted, the wedge-shaped groove on the body pushes the drilling head to slide out of the body, thus realizing the drilling function.

[0008] The patent application with publication number CN109129198A, entitled "Waterjet Aperture Operation Method and Aperture System", includes an aperture opener comprising: a circumferential support mechanism, a vehicle body, an actuator, and a drive mechanism; one end of the circumferential support mechanism is used to connect to the object to be apertured, and the other end of the circumferential support mechanism is rotatably connected to the vehicle body; the drive mechanism and the actuator are respectively installed at the upper and lower ends of the vehicle body; the actuator can rotate relative to the vehicle body, and the drive mechanism drives the vehicle body to perform circumferential motion relative to the circumferential support mechanism, thereby driving the actuator to perform circumferential motion. Summary of the Invention

[0009] This invention was made to enable the establishment of circulation channels during well completion in deep and ultra-deep wells, and provides a hydraulic orifice opener, system, application, and method for establishing circulation channels in ultra-deep well tubing.

[0010] As one aspect of the present invention, an embodiment of the present invention provides a hydraulic hole opener, which may include: a connector, a hole opener body, an impact member, a sealing plug, a first piston, and a punch; wherein, the connector is provided with a hollow channel, one end of the connector is detachably connected to the hole opener body, and the other end is used for connecting an external traction device;

[0011] The hole opener body has a first channel, an oil storage chamber and a second channel connected in sequence, and a blind hole connected to the second channel is opened on the side of the hole opener body.

[0012] The impact member is located in the hollow channel, or the impact member is located in the first channel; the sealing plug is located in the first channel and is used to seal the first channel; the first piston is located in the first channel; the oil reservoir is pre-stored with hydraulic oil; and the punch is located in the blind hole.

[0013] Under the action of the wellbore fluid column, the impact member impacts the sealing plug, causing the sealing plug to rupture. The wellbore fluid column then acts on the first piston, which slides in the first channel to squeeze the hydraulic oil in the oil storage chamber. The hydraulic oil then acts on the impact rod through the second channel, causing the impact rod to penetrate the target tubing.

[0014] In one embodiment, the inner diameter of the first channel is larger than the inner diameter of the second channel.

[0015] In one embodiment, the impact member includes an impact rod and a second piston, wherein the impact rod and the second piston are integral or separate.

[0016] When the impact rod and the second piston are separate components, the impact rod and the second piston are connected.

[0017] In one embodiment, the impact member is located in the hollow channel, which includes a first section and a second section. The inner diameter of the first section is smaller than the inner diameter of the second section. The second piston of the impact member is located in the first section, and the movement distance of the impact member in the first section is greater than the distance between the end of the impact rod of the impact member and the sealing plug.

[0018] In one embodiment, the first channel includes a third segment and a fourth segment, the inner diameter of the third segment being larger than the inner diameter of the fourth segment, a step being formed between the third segment and the fourth segment, and the sealing plug being limited by the step and the connector to seal the first channel.

[0019] In one embodiment, the connector has a plurality of first through holes communicating with the first segment, and the hole opener body has a plurality of second through holes communicating with the third segment; when the connector and the hole opener body are connected, the first through holes and the second through holes are connected.

[0020] In one embodiment, the hydraulic punch may further include a tension spring located in the second channel, one end of the tension spring being connected to the punch and the other end being connected to the punch body.

[0021] In one embodiment, the sealing plug is made of ceramic.

[0022] In one embodiment, the punch includes a cylindrical portion and a cutting edge, the outer diameter of the cylindrical portion matching the diameter of the blind hole, and the cutting edge acting on the target pipe in a direction perpendicular to the target pipe to penetrate the target pipe.

[0023] As another aspect of the present invention, an embodiment of the present invention provides a hydraulic tapping system, comprising: a traction device, a hydraulic supply device, and the aforementioned hydraulic tapper;

[0024] The traction device is a steel wire or a continuous oil pipe, and the traction device is connected to the hydraulic tapping device through the joint.

[0025] The hydraulic supply device is used to inject high-pressure fluid into the wellbore so that the high-pressure fluid acts on the hydraulic tap and causes the punch of the hydraulic tap to penetrate the target tubing.

[0026] As another aspect of the present invention, an embodiment of the present invention provides an application of a hydraulic hole opener in a hydraulic hole opening system, wherein the hydraulic hole opener is as described above.

[0027] As another aspect of the present invention, an embodiment of the present invention provides a method for establishing a circulation channel for an ultra-deep well tubing string. The method for establishing the circulation channel for the tubing string is based on the aforementioned hydraulic perforation system and includes:

[0028] The hydraulic tapping tool is lowered into the target well using a traction device and positioned at the target tubing position to be tapped.

[0029] High-pressure fluid is injected into the wellbore through a hydraulic supply device. The high-pressure fluid acts on the impact component of the hydraulic tap. After the pressure reaches a predetermined value, the impact component moves and impacts the sealing plug of the hydraulic tap, causing the sealing plug to rupture. The high-pressure fluid enters the first channel of the hydraulic tap and squeezes the first piston of the hydraulic tap.

[0030] The first piston replaces the hydraulic oil pre-stored in the oil reservoir of the hydraulic tapper, so that the hydraulic oil acts on the punch of the hydraulic tapper through the second channel of the hydraulic tapper, causing the punch to penetrate the target tubing.

[0031] The beneficial effects of the above-mentioned technical solutions provided in the embodiments of the present invention include at least the following:

[0032] This invention provides a hydraulic perforator, system, application, and method for establishing a circulation channel in ultra-deep well tubing. The inventor of the hydraulic perforator innovatively proposes a method of using the gravity of the wellbore hydraulic column to perform perforation. By using the hydraulic column pressure as the driving force, it rationally utilizes the gravitational potential energy and hydraulic pressure potential energy naturally present in the tubing string, eliminating the need for traditional mechanical cutting or perforation tools. This reduces the failure rate of downhole operations and lowers operating costs. Furthermore, the hydraulic perforator provided in this invention, using hydraulic column pressure for perforation, has lower requirements for tubing material and thickness, making it widely applicable and providing a more efficient and environmentally friendly technical solution for oil and gas exploration and development. Moreover, the hydraulic perforator provided in this invention effectively solves the problem of not establishing an effective circulation channel during well completion in deep and ultra-deep wells, resolving the issue of kill fluid circulation during subsequent tripping operations.

[0033] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings.

[0034] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0035] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0036] Figure 1 This is a structural diagram of the hydraulic hole opener provided in an embodiment of the present invention;

[0037] Figure 2 This is a schematic diagram of the hydraulic tapping system provided in an embodiment of the present invention;

[0038] Among them, 1-hydraulic hole opener; 2-traction device; 3-hydraulic supply device;

[0039] 11-Connector; 12-Hole opener body; 13-Impact component; 14-Sealing plug; 15-First piston; 16-Punch; 17-Tension spring;

[0040] 111-Hollow channel; 112-First through hole; 121-First channel; 122-Oil reservoir; 123-Second channel; 124-Blind hole; 125-Step; 126-Second through hole; 131-Impact rod; 132-Second piston; 161-Cylindrical part; 162-Cutting edge;

[0041] 1111 - First paragraph; 1112 - Second paragraph; 1211 - Third paragraph; 1212 - Fourth paragraph. Detailed Implementation

[0042] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0043] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "far," "near," "front," and "rear," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this 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 this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 invention based on the specific circumstances.

[0045] The inventor, with deep expertise in the field of oil extraction technology, after studying existing methods and equipment, believes that although these methods and equipment are widely used, several problems remain. Firstly, purely mechanical perforation inevitably damages the tubing string, lacking safety. Secondly, hydraulic jet perforation requires carrying sand during operation, leading to sand settling, which can cause tubing blockage and safety issues. Thirdly, perforation technology involves explosives, making it highly susceptible to temperature and pressure fluctuations, resulting in high equipment and construction costs. In view of these problems, this invention is proposed to provide a hydraulic perforator, system, application, and method for establishing circulation channels in ultra-deep well tubing strings that overcomes or at least partially solves these problems.

[0046] The inventors of this application initially designed a method for establishing a circulation channel for ultra-deep well tubing. The main objective of this method is to reduce mechanical damage to the tubing and save costs. Based on this objective, the inventors of this application designed the hydraulic perforator in this embodiment.

[0047] This invention provides a hydraulic hole opener, as shown in the following embodiment. Figure 1 As shown, the hydraulic hole opener 1 may include: a connector 11, a hole opener body 12, an impact member 13, a sealing plug 14, a first piston 15, and a punch 16; wherein, the connector 11 is provided with a hollow channel 111, one end of the connector 11 is detachably connected to the hole opener body 12, and the other end is used to connect to an external traction device 2; the hole opener body 12 has a first channel 121, an oil reservoir 122, and a second channel 123 connected in sequence, and a blind hole 124 communicating with the second channel 123 is opened on the side of the hole opener body 12; the impact member 13 is located in the hollow channel 111, or, the impact member 13 is located in the first channel 121. In a first channel 121; a sealing plug 14 is located in the first channel 121 and is used to seal the first channel 121; a first piston 15 is located in the first channel 121; hydraulic oil (not shown in the figure) is pre-stored in the oil storage chamber 122; and a punch 16 is located in the blind hole 124. Under the action of the wellbore fluid column, the impact member 13 impacts the sealing plug 14, so that after the sealing plug 14 is broken, the wellbore fluid column acts on the first piston 15. The first piston 15 slides in the first channel 121 to squeeze the hydraulic oil in the oil storage chamber 122. The hydraulic oil acts on the punch 16 through the second channel 123, so that the punch 16 penetrates the target tubing.

[0048] In this embodiment of the invention, the connector 11 serves as a connecting component, connecting the hydraulic tapper 1 to the external traction device 2 so as to lower the hydraulic tapper 1 to the position to be tapped in the target well. On the other hand, the hollow channel 111 of the connector 11 can serve as a receiving chamber for the impact member 13, and the high-pressure wellbore fluid column enters the tubing tapper through the hollow channel 111 of the connector 11 and acts on the impact member 13.

[0049] In this embodiment, the impact member 13 serves as the direct power component of the hydraulic tapper 1 and is the main device for opening the inlet channel (the first channel 121 in this embodiment of the invention) of the hydraulic tapper 1. The impact member 13 moves (moves downward) under the action of external force (high pressure of the wellbore fluid column) and knocks open the sealing plug 14 so that the high pressure fluid enters the first channel 121.

[0050] The aforementioned sealing plug 14 serves as a seal for the inlet channel (first channel 121 in this embodiment of the invention) of the hydraulic tapper 1. In the initial state, the sealing plug 14 seals the first channel 121, so that the pressure in the first channel 121, the oil storage chamber 122 and the second channel 123 remains balanced and isolated from external pressure. In this state, the punch 16 is ensured to be located in the blind hole 124.

[0051] The first piston 15 is located in the first channel 121. After the sealing plug 14 is broken, the wellbore fluid column enters the first channel 121, which instantly triggers the first piston 15 to move downward to squeeze the hydraulic oil pre-stored in the oil storage chamber 122. At this time, the pressure acting on the first piston 15 is the sum of the weight of the wellbore fluid column itself and the hydraulic pressure acting on the sealing plug 14.

[0052] The aforementioned oil reservoir 122 is used to store hydraulic oil and provide a pressure oil source for the hydraulic tapper 1. The oil reservoir 122 ensures the functions of hydraulic oil storage and pressure stability. When the first piston 15 moves downward, a huge pressure is generated in the oil reservoir 122, causing the hydraulic oil to instantly pass through the second channel 123 and act on the punch 16.

[0053] As the most direct opening component, the punch 16 can be opened instantly under the action of high hydraulic energy accumulated in the oil storage chamber 122. The pressure acting on the punch 16 is the sum of the wellbore fluid column pressure and the pressure of opening the sealing plug 14. For deep or ultra-deep wells, the gravity generated by the wellbore fluid column is sufficient to completely penetrate the tubing string.

[0054] The hydraulic perforator provided in this embodiment of the invention innovatively proposes a method of perforation using the gravity of the wellbore hydraulic column. By using the hydraulic column pressure as the driving force, it rationally utilizes the gravitational potential energy and hydraulic pressure potential energy naturally present in the tubing string, eliminating the need for traditional mechanical cutting or perforation tools. This reduces the failure rate of downhole operations and lowers operating costs. Furthermore, the hydraulic perforator provided in this embodiment of the invention, which uses hydraulic column pressure for perforation, has lower requirements for tubing material and thickness, making it widely applicable and providing a more efficient and environmentally friendly technical solution for oil and gas exploration and development. Moreover, the hydraulic perforator provided in this embodiment of the invention can effectively solve the problem of insufficient circulation channels during well completion in deep and ultra-deep wells, resolving the issue of kill fluid circulation during subsequent tripping operations.

[0055] In a preferred embodiment, refer to Figure 1As shown, the inner diameter of the first channel 121 is larger than the inner diameter of the second channel 123. In this embodiment of the invention, by setting the inner diameter of the first channel 121 to be larger than the inner diameter of the second channel 123, when the high hydraulic pressure energy of the oil reservoir 122 is released instantaneously, the impact force on the punch 16 is increased by reducing the inner diameter of the second channel 123, so that the punch 16 can penetrate the target tubing.

[0056] In an optional embodiment, reference is also made to Figure 1 As shown, the impact component 13 may include an impact rod 131 and a second piston 132, which may be integral or separate. In the separate configuration, the impact rod 131 and the second piston 132 are connected. Preferably, in this embodiment, the impact rod 131 and the second piston 132 are connected, which facilitates the fixing of the impact rod 131 and allows the hydraulic pressure from the tubing column to be directly transmitted to the impact rod 131 via the second piston 132.

[0057] In one specific embodiment, reference is also made to Figure 1 As shown, the impact member 13 is located in the hollow channel 111. The hollow channel 111 includes a first section 1111 and a second section 1112. The inner diameter of the first section 1111 is smaller than the inner diameter of the second section 1112. The second piston 132 of the impact member 13 is located in the first section 1111. The moving distance of the impact member 13 in the first section 1111 is greater than the distance between the end of the impact rod 131 of the impact member 13 and the sealing plug 14. In this embodiment of the invention, the inner diameter of the first segment 1111 of the hollow channel 111 is smaller than the inner diameter of the second segment 1112. The moving distance of the impact member 13 in the first segment 1111 is greater than the distance between the end of the impact rod 131 of the impact member 13 and the sealing plug 14. The purpose of this arrangement is that, firstly, the moving distance of the impact member 13 in the first segment 1111 is greater than the distance between the end of the impact rod 131 of the impact member 13 and the sealing plug 14. This ensures that the impact member 13 can knock open the sealing plug 14 before it leaves the first segment 1111. After knocking open the sealing plug 14, the impact member 13 will remain in the second segment 1112 and will not obstruct the wellbore fluid column from entering the first channel 121 of the opening body 12.

[0058] In a more specific embodiment, reference is also made to Figure 1As shown, the first channel 121 may include a third segment 1211 and a fourth segment 1212. The inner diameter of the third segment 1211 is larger than the inner diameter of the fourth segment 1212. A step 125 is formed between the third segment 1211 and the fourth segment 1212. The sealing plug 14 is limited by the step 125 and the connector 11 to seal the first channel 121. This embodiment of the invention provides a specific implementation of the sealing plug 14. By placing the sealing plug 14 at the step 125 between the third segment 1211 and the fourth segment 1212 of the first channel 121, and limiting the sealing plug 14 through the connector 11, the sealing plug 14 can be effectively fixed and the purpose of sealing the first channel 121 can be achieved.

[0059] In an optional embodiment, refer to Figure 1 As shown, the connector 11 has several first through holes 112 communicating with the first segment 1111, and the hole opener body 12 has several second through holes 126 communicating with the third segment 1211. When the connector 11 and the hole opener body 12 are connected, the first through holes 112 and the second through holes 126 are connected. In this embodiment, the first through holes 112 on the connector 11 and the second through holes 126 on the hole opener body 12 are through holes connecting the inside and outside of the hollow channel 111 of the connector 11, ensuring that the pressure inside and outside the hollow channel 111 is balanced. The arrangement of the first through holes 112 and the second through holes 126 enables the impact member 13 to smoothly break open the sealing plug 14 under the hydraulic action of the tubing column, avoiding the impact member from compressing the air in the hollow channel 111 and generating resistance during the movement of the hollow channel 111.

[0060] In a preferred embodiment, reference is also made to Figure 1 As shown, the hydraulic hole opener 1 may further include a tension spring 17 located in the second channel 123, one end of which is connected to the punch 16 and the other end of which is connected to the hole opener body 12. In this embodiment of the invention, by providing a tension spring 17 connecting the punch 16 and the hole opener body 12, it is ensured that the punch 16 will not fall into the annulus of the target tube after it penetrates the target tube, and the punch 16 can be promptly retrieved into the blind hole 124, facilitating the removal of all components of the hydraulic hole opener 1.

[0061] In one embodiment, the sealing plug 14 is made of ceramic. The ceramic material of the sealing plug 14 in this embodiment of the invention serves two purposes: firstly, it can rupture upon impact with the impact member 13, opening the first channel 121 and allowing high-pressure fluid to be rapidly injected into it; secondly, the ceramic sealing plug 14 effectively seals the first channel 121, maintaining a constant pressure within the first channel 121 under natural conditions. It should be noted that the sealing plug 14 in this embodiment is a conventional sealing plug 14; its structure only needs to seal the first channel 121 and rupture upon impact with the impact member 13. This embodiment does not impose specific limitations on this.

[0062] In one embodiment, the punch 16 includes a cylindrical portion 161 and a cutting edge 162. The outer diameter of the cylindrical portion 161 matches the diameter of the blind hole 124. The cutting edge 162 is used to act on the target tubing in a direction perpendicular to the target tubing to penetrate it. In this embodiment, the punch 16 opens instantaneously under the action of high hydraulic energy accumulated in the oil reservoir 122. The cutting edge 162 of the punch 16 penetrates along the direction perpendicular to the target tubing. At this time, the cross-section of the tubing is subjected to a super strong compressive and shear force, exceeding the strength limit of the tubing, and completely penetrating the tubing. The cutting edge 162 can be conical, triangular, etc., and this embodiment does not specifically limit it.

[0063] The hydraulic hole opener 1 provided in this embodiment of the invention is in a self-sealing state during the lowering process. When a hole needs to be opened at the lowering position, the sealing plug 14 of the hydraulic hole opener 1 is opened by external pressure or mechanical means. The pressure of the wellbore fluid column and the additional pressure outside the tool are instantly applied to the first piston 15 of the hydraulic hole opener 1. Under the action of the first piston 15, the punch 16 instantly penetrates the tubing string. The hydraulic hole opener 1 does not require additional mechanical power or external force to push it. It relies entirely on the natural gravity of the wellbore fluid column to achieve precise hole opening of the tubing string, thereby establishing a circulation channel for the kill fluid.

[0064] Based on the same inventive concept, this invention also provides a hydraulic drilling system, referring to... Figure 2 As shown, the hydraulic tapping system may include: a traction device 2, a hydraulic supply device 3, and the aforementioned hydraulic tapper 1; the traction device 2 is a steel wire or a continuous tubing, and the traction device 2 is connected to the hydraulic tapper 1 through a connector 11; the hydraulic supply device 3 is used to inject high-pressure fluid into the wellbore so that the high-pressure fluid acts on the hydraulic tapper 1 and causes the punch 16 of the hydraulic tapper 1 to penetrate the target tubing.

[0065] In this embodiment of the invention, the traction device 2 can be a steel wire or a continuous hydraulic tube. When it is necessary to perform a hole-opening operation on the hydraulic tube, the traction device 2 used in this system is a continuous hydraulic tube. It is connected to the connector 11 of the hydraulic hole opener 1 through the continuous hydraulic tube, and is lowered into the hole to be opened and fixed. Then, the hole is opened by pressurizing the continuous hydraulic tube. Those skilled in the art will understand that when it is necessary to perform a hole-opening operation on other tubing (such as casing), the overall diameter of the hydraulic hole opener 1 in this embodiment is larger than that of the hydraulic hole opener 1 used for opening the hydraulic tube. During operation, a steel wire can be used for traction and fixed by a packer. The hole is opened by injecting high-pressure fluid into the casing to act on the hydraulic hole opener 1.

[0066] Based on the same inventive concept, this embodiment of the invention also provides an application of a hydraulic hole opener in a hydraulic hole opening system, wherein the hydraulic hole opener is the hydraulic hole opener in the above embodiment.

[0067] Based on the same inventive concept, this invention also provides a method for establishing a circulation channel for an ultra-deep well tubing. This method establishes the circulation channel based on the aforementioned hydraulic perforation system, combined with... Figure 1 and Figure 2 As shown, the establishment method may include the following steps:

[0068] Step 1: Use the traction device 2 to lower the hydraulic hole opener 1 into the target well and position it at the target tubing position to be opened;

[0069] Step 2: High-pressure fluid is injected into the wellbore through the hydraulic supply device 3. The high-pressure fluid acts on the impact member 13 of the hydraulic tap 1. After the pressure reaches the predetermined value, the impact member 13 moves and impacts the sealing plug 14 of the hydraulic tap 1, so that the sealing plug 14 is broken. The high-pressure fluid enters the first channel 121 of the hydraulic tap 1 and squeezes the first piston 15 of the hydraulic tap 1.

[0070] Step 3: The first piston 15 replaces the hydraulic oil pre-stored in the oil reservoir 122 of the hydraulic tapper 1, so that the hydraulic oil acts on the punch 16 of the hydraulic tapper 1 through the second channel 123 of the hydraulic tapper 1, causing the punch 16 to penetrate the target tubing.

[0071] The specific implementation and beneficial effects of the hydraulic tapping system, the hydraulic tapping tool in the hydraulic tapping system, and the method for establishing circulation channels in ultra-deep well tubing provided in this embodiment of the invention can be referred to in the detailed description of the hydraulic tapping tool. This embodiment of the invention will not be repeated here.

[0072] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. This disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims. Thus, if these modifications and variations of the invention fall within the scope of the claims of the invention and their equivalents, the invention is also intended to include these modifications and variations.

Claims

1. A hydraulic hole opener, characterized in that, include: The device comprises a connector, a hole opener body, an impact component, a sealing plug, a first piston, and a punch; wherein the connector is provided with a hollow channel, one end of the connector is detachably connected to the hole opener body, and the other end is used for connecting an external traction device. The hole opener body has a first channel, an oil storage chamber and a second channel connected in sequence, and a blind hole connected to the second channel is opened on the side of the hole opener body. The impact member is located in the hollow channel, or the impact member is located in the first channel; the sealing plug is located in the first channel and is used to seal the first channel; the first piston is located in the first channel; the oil reservoir is pre-stored with hydraulic oil; and the punch is located in the blind hole. Under the action of the wellbore fluid column, the impact member impacts the sealing plug, causing the sealing plug to rupture. The wellbore fluid column then acts on the first piston, which slides in the first channel to squeeze the hydraulic oil in the oil storage chamber. The hydraulic oil then acts on the impact rod through the second channel, causing the impact rod to penetrate the target tubing.

2. The hydraulic hole opener according to claim 1, characterized in that, The inner diameter of the first channel is larger than the inner diameter of the second channel.

3. The hydraulic hole opener according to claim 2, characterized in that, The impact component includes an impact rod and a second piston, which can be integrated or separate. When the impact rod and the second piston are separate components, the impact rod and the second piston are connected.

4. The hydraulic hole opener according to claim 2, characterized in that, The impact member is located in the hollow channel, which includes a first section and a second section. The inner diameter of the first section is smaller than that of the second section. The second piston of the impact member is located in the first section. The moving distance of the impact member in the first section is greater than the distance between the end of the impact rod of the impact member and the sealing plug.

5. The hydraulic hole opener according to claim 4, characterized in that, The first channel includes a third segment and a fourth segment, the inner diameter of the third segment is larger than the inner diameter of the fourth segment, a step is formed between the third segment and the fourth segment, and the sealing plug is limited by the step and the joint to seal the first channel.

6. The hydraulic hole opener according to claim 5, characterized in that, The connector has several first through holes communicating with the first segment, and the hole opener body has several second through holes communicating with the third segment; when the connector and the hole opener body are connected, the first through holes and the second through holes are connected.

7. The hydraulic hole opener according to any one of claims 1 to 6, characterized in that, The hydraulic punch further includes a tension spring located in the second channel, one end of which is connected to the punch and the other end of which is connected to the punch body.

8. The hydraulic hole opener according to any one of claims 1 to 6, characterized in that, The sealing plug is made of ceramic.

9. The hydraulic hole opener according to any one of claims 1 to 6, characterized in that, The punch includes a cylindrical portion and a cutting edge. The outer diameter of the cylindrical portion matches the diameter of the blind hole. The cutting edge is used to act on the target pipe in a direction perpendicular to the target pipe to penetrate the target pipe.

10. A hydraulic tapping system, characterized in that, include: The traction device, the hydraulic supply device, and the hydraulic hole opener as described in any one of claims 1 to 9; The traction device is a steel wire or a continuous oil pipe, and the traction device is connected to the hydraulic tapping device through the joint. The hydraulic supply device is used to inject high-pressure fluid into the wellbore so that the high-pressure fluid acts on the hydraulic tap and causes the punch of the hydraulic tap to penetrate the target tubing.

11. An application of a hydraulic hole opener in a hydraulic hole opening system, characterized in that, The hydraulic tapper is the hydraulic tapper as described in any one of claims 1 to 9.

12. A method for establishing a circulation channel in an ultra-deep well casing, characterized in that, The hydraulic tapping system according to claim 10 establishes a tubular circulation channel, the method of which includes: The hydraulic tapping tool is lowered into the target well using a traction device and positioned at the target tubing position to be tapped. High-pressure fluid is injected into the wellbore through a hydraulic supply device. The high-pressure fluid acts on the impact component of the hydraulic tap. After the pressure reaches a predetermined value, the impact component moves and impacts the sealing plug of the hydraulic tap, causing the sealing plug to rupture. The high-pressure fluid enters the first channel of the hydraulic tap and squeezes the first piston of the hydraulic tap. The first piston replaces the hydraulic oil pre-stored in the oil reservoir of the hydraulic tapper, so that the hydraulic oil acts on the punch of the hydraulic tapper through the second channel of the hydraulic tapper, causing the punch to penetrate the target tubing.

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