Wellhead hydraulic pressure punching device

Abstract

The utility model discloses a well mouth hydraulic pressure punching device which is used for punching on an outer layer sleeve, inner layer sleeves are arranged in the outer layer sleeve at intervals, and the well mouth hydraulic pressure punching device comprises a fixing frame and a punching assembly, the fixing frame comprises a first fixing seat and a second fixing seat, and the first fixing seat and the second fixing seat can surround the outer layer sleeve. The first fixing seat is provided with a vertical plate body, and the vertical plate body and the outer-layer sleeve are spaced from each other; the punching assembly comprises a first conveying pipe, the first conveying pipe comprises an outlet end extending to the position between the vertical plate body and the outer-layer sleeve, and the axis of the outlet end penetrates through the outer-layer sleeve and is located outside the inner-layer sleeve, so that high-pressure liquid passing through the first conveying pipe is sprayed to the outer-layer sleeve; the axis of the outlet end of the first conveying pipe can penetrate through the outer-layer casing pipe and is located outside the inner-layer casing pipe, so that high-pressure liquid is prevented from making direct contact with the inner-layer casing pipe while the outer-layer casing pipe is tapped through the high-pressure liquid, no open fire is generated in the whole tapping process, and the safety of field implementation is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of oil field downhole operation equipment, in particular to a wellhead hydraulic pressure drilling device. Background Art

[0002] With the development of oil and gas fields, more and more wells with damaged production casings are found. Replacing the casing is one of the commonly used repair methods. The wellhead needs to be cut before replacing the production casing for the following two reasons: First, the wellhead is welded with annular steel plates, and construction cannot be carried out without cutting it; second, when drilling the casing head, the lifting load is large, and the load of the well repair rig hook is small. Even when the limit load is reached, the casing head accessories cannot be lifted out of the outer casing and removed, so the outer casing can only be cut off. Because the damaged production casing is connected to the outer casing, oil and gas are bound to accumulate in the annulus. If the casing is cut directly with gas welding, the oil and gas accumulated in the annulus will be ignited, and the consequences will be disastrous. Therefore, before cutting the wellhead, an observation hole must be drilled to relieve the oil and gas pressure in the annulus.

[0003] The pressurized perforating device in the prior art can perforate the wellhead casing under pressure and relieve pressure. However, there are the following problems: First, the main body needs to be welded to the casing to be perforated before perforating, and its power source is an electric device, which is short from the wellhead, and the safety risk of on-site implementation is extremely high. Second, because the drill bit is perpendicular to the pipe body to be perforated, and the perforation process is a fully enclosed space, the operation accuracy requirements are high, and it is easy to perforate the inner casing.

[0004] Therefore, how to at least partially solve the defects of the above-mentioned pressure punching device is a technical problem that technical personnel in this field need to solve at present. Utility Model Content

[0005] The utility model aims to provide a wellhead hydraulic pressure punching device, which can realize the opening of outer casing and avoid punching through inner casing, while ensuring the safety of on-site implementation.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a wellhead hydraulic pressure perforating device, which is used to make a hole on an outer casing, wherein an inner casing is arranged inside the outer casing, and comprises:

[0007] The fixing frame includes a first fixing seat and a second fixing seat that can be closed to surround the outer sleeve, the first fixing seat is provided with a vertical plate body, and the vertical plate body and the outer sleeve are spaced apart from each other;

[0008] The perforating assembly includes a first delivery pipe, which includes an outlet end extending between the vertical plate and the outer casing. The axis of the outlet end passes through the outer casing and is located outside the inner casing, so that the high-pressure liquid passing through the first delivery pipe can be sprayed to the outer casing.

[0009] Preferably, the first delivery pipe comprises:

[0010] A connecting pipe penetrates the vertical plate body and extends to both sides of the vertical plate body;

[0011] A wear-resistant nozzle is detachably connected to one end of the connecting pipe and is located between the vertical plate and the outer sleeve;

[0012] The first pipeline is detachably connected to an end of the connecting pipe away from the wear-resistant nozzle.

[0013] Preferably, the punching assembly further comprises:

[0014] Storage tanks, used to store liquids;

[0015] A second pipeline, one end of which is connected to the water storage tank, and the other end of which is connected to the first pipeline through the pump body, so that the liquid in the water storage tank flows along the first pipeline after being pressurized by the pump body;

[0016] The abrasive tank is connected to the first pipeline and is used for mixing cutting sand into the high-pressure liquid.

[0017] Preferably, a pressure relief component is also included, and the pressure relief component includes:

[0018] A pressure relief member, which penetrates the vertical plate body and includes an extension section extending to a side of the vertical plate body away from the outer sleeve, and the pressure relief member is provided with a first through hole extending along its length direction;

[0019] The first pressure relief pipeline is connected to the extension section and communicated with the first through hole.

[0020] Preferably, the pressure relief assembly further comprises:

[0021] A pressure gauge, arranged on the first pressure relief pipeline;

[0022] The second pressure relief pipeline is connected to the first pressure relief pipeline, and a pressure relief valve is provided between the first pressure relief pipeline and the second pressure relief pipeline.

[0023] Preferably, the first fixing seat and the second fixing seat are both provided with second through holes, and the connecting member is passed through the two opposite second through holes and then fixed by the fixing member, so that the first fixing seat and the second fixing seat are relatively fixed.

[0024] Preferably, the first fixing seat and the second fixing seat are both provided with semicircular arc surfaces for abutting against the outer sleeve, wherein one of the semicircular arc surfaces is provided with sawtooth-like teeth to limit the relative rotation of the fixing frame and the outer sleeve.

[0025] Preferably, the connecting pipe is located in the middle of the vertical plate body, and the axis of the connecting pipe is perpendicular to the axis of the outer sleeve, the wear-resistant nozzle is bent, and the angle between the axis of the wear-resistant nozzle and the connecting pipe is 15°±3°.

[0026] Preferably, an infrared sensor for detecting openings is also provided on the vertical plate, and the infrared sensor is connected to an alarm device for sounding an alarm when a hole is opened in the outer casing.

[0027] Preferably, both ends of the connecting pipe are provided with connecting threads.

[0028] Compared with the above-mentioned background technology, the wellhead hydraulic pressure punching device provided by the utility model is used to drill holes on the outer casing, and the inner casing is provided inside the outer casing. The wellhead hydraulic pressure punching device includes a fixed frame and a punching assembly. The fixed frame includes a first fixed seat and a second fixed seat that can be closed to surround the outer casing. The first fixed seat is provided with a vertical plate body, and the vertical plate body and the outer casing are spaced apart from each other; the punching assembly includes a first delivery pipe, and the first delivery pipe includes an outlet end extending between the vertical plate body and the outer casing. The axis of the outlet end passes through the outer casing and is located outside the inner casing, so that the high-pressure liquid passing through the first delivery pipe can be sprayed to the outer casing.

[0029] Specifically, the first fixing seat and the second fixing seat are surrounded by the outer casing, so that the fixing frame is fixed relative to the outer casing, and the vertical plate body of the first fixing seat and the outer casing are spaced from each other to form the space required for the outlet end of the first delivery pipe. The axis of the outlet end of the first delivery pipe can pass through the outer casing and be located outside the inner casing, so that the high-pressure liquid can open a hole in the outer casing while avoiding direct contact between the high-pressure liquid and the inner casing. No open flame is generated during the entire opening process to ensure the safety of on-site implementation. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0031] Figure 1 A cross-sectional view of the structure of the connection between the fixing frame and the punching assembly provided in the embodiment of the utility model;

[0032] Figure 2 A structural cross-sectional view of the connection between the fixing frame and the pressure relief assembly provided by the embodiment of the utility model;

[0033] Figure 3 A schematic diagram of the structure of the second fixing seat provided in an embodiment of the utility model;

[0034] Figure 4 This is a schematic structural diagram of the first fixing seat provided in an embodiment of the utility model.

[0035] in:

[0036] 1-Inner casing;

[0037] 2-Outer casing;

[0038] 3-first fixing seat, 31-first cavity, 311-vertical plate, 32-second through hole, 33-connecting member, 34-fixing member, 35-semicircular arc surface, 351-teeth, 352-sealing member;

[0039] 4- second fixing seat;

[0040] 511-connecting pipe, 512-wear-resistant nozzle, 513-first pipeline, 514-connecting thread, 52-water storage tank, 53-second pipeline, 54-pump body, 55-abrasive tank;

[0041] 61 - pressure relief component, 611 - extension section, 612 - first through hole, 62 - first pressure relief pipeline, 63 - pressure gauge, 64 - second pressure relief pipeline, 65 - pressure relief valve. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0043] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0044] In the description of the present invention, it is necessary to understand that the terms "middle", "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the position or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation of the present invention.

[0045] The utility model aims to provide a wellhead hydraulic pressure punching device, which can realize the opening of the outer casing 2 and avoid punching through the inner casing 1, while ensuring the safety of on-site implementation.

[0046] See also Figure 1 To achieve the above purpose, the utility model provides a wellhead hydraulic pressure drilling device, which is used to drill holes on an outer casing 2, and an inner casing 1 is arranged inside the outer casing 2. The wellhead hydraulic pressure drilling device includes a fixing frame and a drilling assembly.

[0047] The fixing frame includes a first fixing seat 3 and a second fixing seat 4 which can be closed to surround the outer sleeve 2 . The first fixing seat 3 is provided with a vertical plate 311 , and the vertical plate 311 and the outer sleeve 2 are spaced apart from each other.

[0048] Among them, the first fixed seat 3 and the second fixed seat 4 are both provided with a second through hole 32, and the connecting piece 33 is passed through the two opposite second through holes 32 and fixed by the fixing piece 34 to make the first fixed seat 3 and the second fixed seat 4 relatively fixed. A first cavity 31 is provided inside the fixing frame, that is, the vertical plate body 311 and the outer sleeve 2 are spaced apart by the first cavity 31. The setting of the first cavity 31 can not only save the material usage of the first fixed seat 3 and the second fixed seat 4, but also provide space for subsequent openings.

[0049] See also Figure 3 and Figure 4 The first fixed seat 3 and the second fixed seat 4 are both provided with a semicircular arc surface 35 for abutting against the outer sleeve 2 on the opposite side. The two semicircular arc surfaces 35 are connected to form a circular arc surface adapted to the diameter of the outer sleeve 2. The semicircular arc surfaces are both upper and lower layers, and the two layers of circular arc surfaces are arranged on both sides of the first cavity 31 in the height direction. One of the semicircular arc surfaces 35 is provided with a serrated tooth 351, and the other semicircular arc surface 35 is provided with a seal 352 that can fit tightly with the outer sleeve 2. The teeth 351 and the seal 352 can achieve tight fit with the outer sleeve 2 while limiting the relative rotation of the fixed frame and the outer sleeve 2.

[0050] The sealing member 352 is in the shape of a U, and its upper and lower sides are respectively arranged at the dividing line between the upper and lower semicircular arc surfaces 35 and the first cavity 31. The connecting member 33 is specifically a bolt, and nuts can be used to fix the two ends of the installed bolt to facilitate the detachable connection between the first fixing seat 3 and the second fixing seat 4. The type of the connecting member 33 and the setting position of the sealing member 352 can also be adjusted according to actual conditions as long as the above-mentioned purpose can be achieved.

[0051] The punching assembly includes a first delivery pipe, which includes an outlet end extending between the vertical plate 311 and the outer casing 2. The axis of the outlet end passes through the outer casing 2 and is located outside the inner casing 1 so that the high-pressure liquid passing through the first delivery pipe can be sprayed to the outer casing 2.

[0052] That is, in the same horizontal plane, the axis of the outlet end intersects with the horizontal section of the outer casing 2 and is separated from the horizontal section of the inner casing 1, so that the high-pressure liquid can be prevented from impacting the inner casing 1 while opening the hole in the outer casing 2.

[0053] The first fixing seat 3 and the second fixing seat 4 are surrounded by the outer casing 2, so that the fixing frame is fixed relative to the outer casing 2. The vertical plate 311 of the first fixing seat 3 and the outer casing 2 are spaced apart from each other to form the space required for the outlet end of the first delivery pipe. The axis of the outlet end of the first delivery pipe can pass through the outer casing 2 and be located outside the inner casing 1, so that the high-pressure liquid can open a hole in the outer casing 2 while avoiding direct contact between the high-pressure liquid and the inner casing 1. No open flame is generated during the entire opening process to ensure the safety of on-site implementation.

[0054] In this embodiment, the first delivery pipe includes a connecting pipe 511, a wear-resistant nozzle 512 and a first pipeline 513. The connecting pipe 511 passes through the vertical plate body 311 and extends to both sides of the vertical plate body 311. Both ends of the connecting pipe 511 are provided with connecting threads 514.

[0055] The wear-resistant nozzle 512 is detachably connected to one end of the connecting pipe 511 and is located between the vertical plate 311 and the outer sleeve 2; the first pipeline 513 is detachably connected to the end of the connecting pipe 511 away from the wear-resistant nozzle 512, that is, the wear-resistant nozzle 512 and the first pipeline 513 are connected through the connecting threads 514 at both ends of the connecting pipe 511 to complete the above-mentioned connection process.

[0056] It should be noted that there are various types of wear-resistant nozzles 512. The type of wear-resistant nozzles 512 is selected according to the specific sizes of the inner sleeve 1 and the outer sleeve 2. After installation, each wear-resistant nozzle 512 satisfies the requirement that the axis of the outlet end passes through the outer sleeve 2 and is located outside the inner sleeve 1. In addition, the connecting pipe 511 is located in the middle of the vertical plate body 311, and the axis of the connecting pipe 511 is perpendicular to the axis of the outer sleeve 2. The wear-resistant nozzle 512 is bent, and the angle between the axis of the wear-resistant nozzle 512 and the axis of the connecting pipe 511 is 15°±3°. The axis of the wear-resistant nozzle 512 and the connecting pipe 511 can be calculated based on the required injection position.

[0057] In some embodiments, the punching assembly also includes a water tank 52, a second pipeline 53 and an abrasive tank 55. The water tank 52 is used to store liquid. The capacity of the water tank 52 can be based on the amount of liquid required for drilling a hole in actual operation. For example, if the amount of water required for drilling a hole is 50L (excluding the remaining water in the pipeline), then the water volume in the water tank 52 needs to be greater than 50L to ensure sufficient water. A liquid level gauge can also be designed in the water tank 52. When the liquid level gauge is lower than a preset height, the water supply pipe connected to the water tank 52 automatically replenishes water.

[0058] One end of the second pipeline 53 is connected to the water storage tank 52, and the other end is connected to the first pipeline 513 through the pump body 54, so that the liquid in the water storage tank 52 can flow along the first pipeline 513 after being pressurized by the pump body 54. The pump body 54 can use a high-pressure plunger pump to increase the liquid pressure to a certain value to ensure the water outlet pressure at the wear-resistant nozzle 512. The required water outlet pressure can be calculated through experiments.

[0059] The abrasive tank 55 is connected to the first pipeline 513 and is used to mix cutting sand into the high-pressure liquid. By connecting the abrasive tank 55 filled with cutting sand to the first pipeline 513, the cutting sand moves into the first pipeline 513 driven by the liquid, mixes with the high-pressure liquid, and is sprayed out along the wear-resistant nozzle 512.

[0060] See also Figure 2 In the present embodiment, a pressure relief assembly is also included, which includes a pressure relief component 61 and a first pressure relief pipeline 62. The pressure relief component 61 penetrates the vertical plate body 311 and includes an extension section 611 extending to the side of the vertical plate body 311 away from the outer casing 2. The pressure relief component 61 is provided with a first through hole 612 extending along its own length direction; the first pressure relief pipeline 62 is connected to the extension section 611 and communicates with the first through hole 612.

[0061] Among them, the pressure relief piece 61 can be arranged at the bottom of the vertical plate body 311. Through the connection between the pressure relief piece 61 and the first cavity 31, the high-pressure liquid injected and the residual pressure in the annulus after the outer casing 2 is opened can be discharged along the pressure relief piece 61 and the first through hole 612.

[0062] In another embodiment, the first through hole 612 and the extension section 611 located outside the vertical plate 311 may be directly provided, and the same technical effect may be achieved by integrally providing the extension section 611 and the vertical plate 311 to replace the pressure relief member 61 .

[0063] In addition, the pressure relief assembly also includes a pressure gauge 63 and a second pressure relief pipeline 64. The pressure gauge 63 is arranged on the first pressure relief pipeline 62 for detecting the pressure in the pipeline. The second pressure relief pipeline 64 is connected to the first pressure relief pipeline 62, and a pressure relief valve 65 is provided between the first pressure relief pipeline 62 and the second pressure relief pipeline 64. The pressure relief valve 65 is normally open during the hole opening process.

[0064] It should be noted that an infrared sensor for detecting openings is also provided on the vertical plate 311. When the infrared sensor detects an opening, it can be fed back to an alarm device connected to the infrared sensor. The alarm device sends an alarm to remind personnel that the opening of the outer casing 2 is completed. A controller can also be set. When the infrared sensor detects an opening, a signal is sent to the controller, and the pump body 54 is controlled to suspend operation through the controller.

[0065] In summary, when the device is operated, first select the corresponding wear-resistant nozzle 512 according to the size of the inner casing 1 and the outer casing 2, connect it with the connecting thread 514 at the inner end of the connecting pipe, and fix the first fixing seat 3 and the second fixing seat 4 on the outer casing 2 to be punched, adjust it to the punching position, match and connect it through four bolts, and tighten the nuts respectively until it is completely fixed on the outer casing 2 to be punched. Start the high-pressure plunger pump, and the clean water placed in the water storage tank 52 enters the high-pressure plunger pump through the second pipeline 53 for pressurization, and after being fully premixed with the abrasive in the abrasive tank 55, it drives the abrasive through the first pipeline 513 and the wear-resistant nozzle 512 to form a high-pressure abrasive jet, which is sprayed to the predetermined position on the outer casing 2 to be punched to achieve the punching operation.

[0066] In this specification, relational terms such as first and second are used merely to distinguish one entity from other entities, but do not necessarily require or imply any such actual relationship or order between these entities.

[0067] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0068] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the utility model.

Claims

1. A wellhead hydraulic pressure perforating device, used for drilling holes on an outer casing, wherein an inner casing is provided inside the outer casing, characterized in that: include: A fixing frame, comprising a first fixing seat and a second fixing seat capable of closing to surround the outer sleeve, wherein the first fixing seat is provided with a vertical plate body, and the vertical plate body and the outer sleeve are spaced apart from each other; The perforating assembly includes a first delivery pipe, which includes an outlet end extending between the vertical plate and the outer casing, and the axis of the outlet end passes through the outer casing and is located outside the inner casing, so that the high-pressure liquid passing through the first delivery pipe can be sprayed to the outer casing.

2. The wellhead hydraulic pressure drilling device according to claim 1 is characterized in that: The first delivery pipe comprises: A connecting pipe, which passes through the vertical plate body and extends to both sides of the vertical plate body; A wear-resistant nozzle, detachably connected to one end of the connecting pipe and located between the vertical plate and the outer sleeve; The first pipeline is detachably connected to an end of the connecting pipe away from the wear-resistant nozzle.

3. The wellhead hydraulic pressure drilling device according to claim 2 is characterized in that: The punching assembly also includes: Storage tanks, used to store liquids; A second pipeline, one end of which is connected to the water storage tank, and the other end of which is connected to the first pipeline through a pump body, so that the liquid in the water storage tank flows along the first pipeline after being pressurized by the pump body; The abrasive tank is connected to the first pipeline and is used for mixing cutting sand into the high-pressure liquid.

4. The wellhead hydraulic pressure drilling device according to claim 1, characterized in that: Also included is a pressure relief assembly, the pressure relief assembly comprising: A pressure relief member, which penetrates the vertical plate and includes an extension section extending to a side of the vertical plate away from the outer sleeve, and the pressure relief member is provided with a first through hole extending along its length direction; The first pressure relief pipeline is connected to the extension section and communicated with the first through hole.

5. The wellhead hydraulic pressure drilling device according to claim 4 is characterized in that: The pressure relief assembly also includes: A pressure gauge, arranged on the first pressure relief pipeline; The second pressure relief pipeline is connected to the first pressure relief pipeline, and a pressure relief valve is provided between the first pressure relief pipeline and the second pressure relief pipeline.

6. The wellhead hydraulic pressure drilling device according to claim 1, characterized in that: The first fixing seat and the second fixing seat are both provided with a second through hole, and the connecting member is passed through the two opposite second through holes and then fixed by the fixing member, so that the first fixing seat and the second fixing seat are relatively fixed.

7. The wellhead hydraulic pressure drilling device according to claim 1, characterized in that: The first fixing seat and the second fixing seat are both provided with a semicircular arc surface for abutting against the outer sleeve, and one of the semicircular arc surfaces is provided with sawtooth teeth to limit the relative rotation of the fixing frame and the outer sleeve.

8. The wellhead hydraulic pressure drilling device according to claim 2, characterized in that: The connecting pipe is located in the middle of the vertical plate body, and the axis of the connecting pipe is perpendicular to the axis of the outer sleeve. The wear-resistant nozzle is bent, and the angle between the wear-resistant nozzle and the axis of the connecting pipe is 15°±3°.

9. The wellhead hydraulic pressure drilling device according to claim 1, characterized in that: The vertical plate body is also provided with an infrared sensor for detecting openings, and the infrared sensor is connected with an alarm device for sounding an alarm when a hole is opened in the outer casing.

10. The wellhead hydraulic pressure drilling device according to claim 2, characterized in that: Both ends of the connecting pipe are provided with connecting threads.

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