Deep hole fracturing separator

Abstract

The utility model relates to the technical field of hydraulic fracturing under a mine, and provides a deep hole fracturing separator. The deep hole fracturing separator comprises a first separating part, a second separating part and a limiting part. The second separating piece is connected with the first separating piece through a sliding sleeve; the first separating piece and the sliding sleeve are in limiting connection through the limiting piece. The limiting piece is used for releasing limiting under the action of pulling force, and under the condition that the limiting piece releases limiting of the first separating piece and the sliding sleeve, the sliding sleeve releases limiting between the first separating piece and the second separating piece. According to the deep hole fracturing separator, the defects that in the prior art, a fracturing device and a plugging device are clamped in a deep hole, so that a whole pipeline for achieving liquid supply in the deep hole and the fracturing device are restrained in the deep hole and cannot be pulled out, and the deep hole is scrapped and cannot be continuously used are overcome, and the deep hole fracturing separator is achieved. When the end assembly in the deep hole breaks down, separation from the end assembly is achieved through the deep hole fracturing separator, and the engineering fault is handled with the minimum loss.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic fracturing in mines, in particular to a deep hole fracturing separator. Background Art

[0002] Hydraulic fracturing technology is an effective means to increase the permeability of coal seams, efficiently extract gas, and manage the disaster of strong mine pressure in hard roof. The realization of fracturing operation is mainly to use a fracturing device to seal a section of the borehole, and then inject high-pressure liquid into the fracturing device to achieve fracturing damage to the coal seam or rock formation.

[0003] When the existing fracturing device for fracturing coal seams or rock formations is working, if the fracturing hole collapses, breaks, or the fracturing equipment itself fails, the fracturing device and the plugging device will be stuck in the deep hole, and the entire pipeline used to supply fluid to the deep hole and the fracturing device will be constrained in the deep hole and cannot be pulled out, causing the deep hole to be scrapped and unable to be used any further. Utility Model Content

[0004] The utility model provides a deep hole fracturing separator, which is used to solve the defect in the prior art that a fracturing device and a plugging device are stuck in a deep hole, thereby causing the entire pipeline and the fracturing device for realizing liquid supply in the deep hole to be constrained in the deep hole and unable to be pulled out, causing the deep hole to be scrapped and unable to be used further. A deep hole fracturing separator is realized, and when an end component in the deep hole fails, separation from the end component is achieved by the deep hole fracturing separator, so that the engineering failure is dealt with with minimum loss.

[0005] The utility model provides a deep hole fracturing separator, comprising a first separator, a second separator and a limiting member. The second separator is connected to the first separator through a sleeve; the first separator and the sleeve are connected by the limiting member. The limiting member is used to release the limit under the action of tension, and when the limiting member releases the limit on the first separator and the sleeve, the sleeve releases the limit between the first separator and the second separator.

[0006] According to a deep hole fracturing separator provided by the utility model, a cavity is provided inside the first separation member, and an opening is provided at the first end of the first separation member, the opening is communicated with the cavity, and a limiting hole is provided on the side wall of the first separation member; the sliding sleeve is provided inside the cavity, and a first limiting groove is provided on the outer wall of the sliding sleeve, the limiting member passes through the limiting hole, and is limitedly connected with the first limiting groove.

[0007] According to a deep hole fracturing separator provided by the utility model, a plurality of second limiting grooves are provided on the inner wall of the first separating member; a plurality of plug-in strips are provided at the first end of the second separating member, and the plurality of plug-in strips are arranged at intervals along the circumference of the second separating member and are arranged one-to-one with the second limiting grooves; a protrusion is provided at one end of the plug-in strip away from the second separating member, and the protrusion is limitedly connected to the second limiting groove.

[0008] According to a deep hole fracturing separator provided by the utility model, a fixing gap is provided at one end of the sliding sleeve facing the plug-in strip; an extension portion is provided at one end of the protrusion away from the plug-in strip, and the extension portion is limit-connected with the fixing gap.

[0009] According to a deep hole fracturing separator provided by the utility model, a first sealing ring and a second sealing ring are provided between the sliding sleeve and the first separation member, and the first sealing ring and the second sealing ring are respectively located at two sides of the first limiting groove.

[0010] According to a deep hole fracturing separator provided by the utility model, a plurality of first plug-in parts are provided at the first end of the first separation member, the plurality of first plug-in parts are arranged at intervals along the circumference of the first separation member, and a first plug-in groove is provided between two adjacent first plug-in parts; a plurality of second plug-in parts are provided at the first end of the second separation member, the plurality of second plug-in parts are arranged at intervals along the circumference of the second separation member, and a second plug-in groove is provided between two adjacent second plug-in parts; the second plug-in parts are arranged in the first plug-in grooves one-to-one, and the first plug-in parts are arranged in the second plug-in grooves one-to-one.

[0011] According to a deep hole fracturing separator provided by the utility model, a connecting portion is provided at the second end of the first separating member, the connecting portion is provided with an external thread, and an internal thread is provided inside the second end of the second separating member.

[0012] According to a deep hole fracturing separator provided by the utility model, the extension portion is inserted into the fixing gap, and the overlapping length between the extension portion and the fixing gap is 1 mm-5 mm.

[0013] According to a deep hole fracturing separator provided by the utility model, the depth of the first limiting groove is 1mm-5mm.

[0014] According to a deep hole fracturing separator provided by the utility model, a plurality of the limiting holes are provided, and the plurality of limiting holes are arranged at intervals along the circumference of the first separation member, and the limiting member, the first limiting groove and the limiting holes are arranged in a one-to-one correspondence.

[0015] The deep hole fracturing separator provided by the utility model can, when the device connected to the second separator is stuck during operation, a pulling force can be applied to the first separator, and the limiting member releases the limit between the first separator and the sleeve under the action of the pulling force, and the sleeve releases the limit on the first separator and the second separator, so that the first separator and the second separator are converted from a connected state to a separable state. Then, the instrument connected to the first separator can be pulled out, and the second separator and the device connected to the second separator can be discarded. Such a setting can avoid the first separator and the device connected to the first separator from being unable to be removed when the device of the second separator is stuck and cannot be removed, thereby minimizing the loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is a structural schematic diagram of the deep hole fracturing separator provided by the utility model.

[0018] Figure 2 It is a cross-sectional view of the deep hole fracturing separator provided by the utility model.

[0019] Figure 3 It is a structural schematic diagram of the second separation component of the deep hole fracturing separator provided by the utility model.

[0020] Figure markings: 100: first separating piece; 200: second separating piece; 300: limiting piece; 400: sliding sleeve; 110: external thread; 120: first plug-in portion; 130: first plug-in groove; 140: limiting hole; 150: second limiting groove; 210: second plug-in portion; 220: second plug-in groove; 230: internal thread; 240: plug-in strip; 250: protrusion; 260: extension portion; 410: first sealing ring; 420: first limiting groove; 430: second sealing ring; 440: clamping gap. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the utility model. Obviously, the described embodiments are 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.

[0022] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0023] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood in specific circumstances.

[0024] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0025] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0026] Combine the following Figure 1-Figure 3 The utility model describes a deep hole fracturing separator.

[0027] in, Figure 1 The schematic diagram of the structure of the deep hole fracturing separator provided by the embodiment of the utility model is illustrated. Figure 1 The deep hole fracturing separator provided in this embodiment includes a first separator 100, a second separator 200 and a stopper 300. The second separator 200 is connected to the first separator 100 through a sleeve 400; the first separator 100 and the sleeve 400 are connected in a limited manner through the stopper 300. The stopper 300 is used to release the limit under the action of tension. When the stopper 300 releases the limit on the first separator 100 and the sleeve 400, the sleeve 400 releases the limit between the first separator 100 and the second separator 200.

[0028] In the above structure, when the device connected to the second separator 200 is stuck during operation, a pulling force can be applied to the first separator 100, and the limiting member 300 releases the limit between the first separator 100 and the sliding sleeve 400 under the action of the pulling force, and the sliding sleeve 400 releases the limit between the first separator 100 and the second separator 200, so that the first separator 100 and the second separator 200 are converted from a connected state to a separable state. Then, the device connected to the first separator 100 can be pulled out, and the second separator 200 and the device connected to the second separator 200 can be discarded. Such a setting can avoid that when the device of the second separator 200 cannot be removed due to being stuck, the first separator 100 and the device connected to the first separator 100 cannot be removed, thereby minimizing the loss.

[0029] Specifically, in some possible embodiments, the second separator 200 is used to connect the fracturing device or the plugging device, and the first separator 100 is used to connect with the liquid supply pipeline or the liquid supply rod. If the fracturing hole collapses, shatters, or the fracturing equipment itself fails, it is very easy for the fracturing device and the plugging device to be stuck in the deep hole. At this time, the entire pipeline and the fracturing device used to achieve the liquid supply in the deep hole will be constrained in the deep hole and cannot be pulled out, resulting in a large cost loss; furthermore, the deep hole is scrapped and cannot be used further because the liquid supply pipeline and the liquid supply components are stuck inside it. By using the utility model, when the terminal device is stuck in the deep hole, a controllable separation action can be achieved. This action is similar to the "cutting wrist" action, which leaves the terminal device in the deep hole, and the liquid supply pipeline and the components on the liquid supply pipeline can be retained and moved out, so as to deal with the terminal failure during deep hole fracturing with minimal loss.

[0030] Figure 2 The cross-sectional view of the deep hole fracturing separator provided by the embodiment of the utility model is illustrated. Figure 2 In some embodiments of the utility model, a cavity is provided inside the first separating member 100, and an opening is provided at the first end of the first separating member 100, which is connected to the cavity, and a limiting hole 140 is provided on the side wall of the first separating member 100; the sliding sleeve 400 is provided inside the cavity, and a first limiting groove 420 is provided on the outer wall of the sliding sleeve 400, and the limiting member 300 passes through the limiting hole 140 and is limitedly connected to the first limiting groove 420.

[0031] Specifically, the first separation member 100 is a tubular structure, in which a cavity is provided, and both ends are open. The sliding sleeve 400 is also a tubular structure, and is attached to the inner wall of the first separation member 100, that is, the sliding sleeve 400 is sleeved inside the first separation member 100. The limiting hole 140 is arranged on the side wall of the first separation member 100, and the first limiting groove 420 extends inward from the outer wall of the sliding sleeve 400 to form a groove. The limiting hole 140 can be a cylindrical structure, and the first limiting groove 420 is a cylindrical structure. And the first limiting groove 420 and the limiting hole 140 have the same diameter, and both can make the limiting member 300 embedded therein. Since the limiting member 300 needs to release the limit under the action of tension, the diameter of the limiting member 300 should be set to be smaller, so that it is convenient to break the limiting member 300 under the action of tension, and then release the limit. The material of the stopper 300 may be copper or iron, etc. In some possible embodiments, in order to facilitate the breakage of the stopper 300 under the action of tension, an opening of a certain depth may be provided at the break of the stopper 300. Thus, when tension is applied to the stopper 300, the stopper 300 can be better broken at the opening thereof.

[0032] Figure 3The schematic diagram of the structure of the second separation member of the deep hole fracturing separator provided by the embodiment of the utility model is illustrated. Figure 3 In some embodiments of the utility model, a plurality of second limiting grooves 150 are provided on the inner wall of the first separating member 100; a plurality of plug-in strips 240 are provided on the first end of the second separating member 200, and the plurality of plug-in strips 240 are arranged at intervals along the circumference of the second separating member 200, and are arranged one-to-one corresponding to the second limiting grooves 150; a protrusion 250 is provided on one end of the plug-in strip 240 away from the second separating member 200, and the protrusion 250 is limitedly connected to the second limiting groove 150.

[0033] Specifically, the second separator 200 can be a tubular structure, that is, its interior is hollow and has openings at both ends. The plug-in strip 240 is a long strip structure, and one end is connected to the inner wall of the second separator 200, and the other end extends outward from the opening at the first end of the second separator 200. A certain gap is provided between two connected plug-in strips 240, and the number of plug-in strips 240 can be 4, 5, 6, etc., and the specific number is not limited and can be set according to actual conditions. The protrusion 250 is provided on the outer wall of the plug-in strip 240, and protrudes outward from the outer wall of the plug-in strip 240, thereby forming a block on the outer wall of the plug-in strip 240. A second limiting groove 150 is provided on the inner wall of the first separator 100, and the shape and size of the second limiting groove 150 match the plug-in strip 240. When the first separating component 100 and the second separating component 200 are connected together, the plug-in strip 240 will be plugged into the inside of the first separating component 100, and when the protrusion 250 is limited inside the second limiting groove 150, the outer wall of the plug-in strip 240 is tightly attached to the inner wall of the first separating component 100, thereby limiting the connection between the first separating component 100 and the second separating component 200.

[0034] Reference Figure 3 In some embodiments of the present invention, a fixing gap 440 is provided at one end of the sliding sleeve 400 facing the plug-in strip 240 ; an extension portion 260 is provided at one end of the protrusion 250 away from the plug-in strip 240 , and the extension portion 260 is limitedly connected to the fixing gap 440 .

[0035] It is understandable that a notch is provided at one end of the sliding sleeve 400 facing the plug-in strip 240, and the notch is provided on the outer wall of the sliding sleeve 400, so that a space is formed between the sliding sleeve 400 and the first separating member 100, and the space constitutes the second sealing ring 430. When the second separating member 200 is inserted into the interior of the first separating member 100, the plug-in strip 240 is arranged close to the inner wall of the first separating member 100, and when the protrusion 250 is limited in the second limiting groove 150, the extension 260 is inserted in the fixing gap 440. In this way, when a pulling force is applied to the second separating member 200, it is prevented that the plug-in strip 240 is contracted under the action of the second limiting groove 150 and the protrusion 250, so that the first separating member 100 and the second separating member 200 are separated, resulting in the first separating member 100 and the second separating member 200 being limited and not firm enough. By providing the fixing gap 440 and the extension portion 260 , when a pulling force is applied to both, the fixing gap 440 will prevent the extension portion 260 and further prevent the plug-in strip 240 from shrinking inwards, thereby making the connection between the first separating member 100 and the second separating member 200 more secure.

[0036] Reference Figure 2 In some embodiments of the present invention, a first sealing ring 410 and a second sealing ring 430 are provided between the sliding sleeve 400 and the first separating member 100, and the first sealing ring 410 and the second sealing ring 430 are respectively located on both sides of the first limiting groove 420. The first sealing ring 410 and the second sealing ring 430 can prevent leakage at the limiting hole 140.

[0037] Reference Figure 1 and Figure 3 In some embodiments of the utility model, a first end of the first separating member 100 is provided with a plurality of first plug-in portions 120, the plurality of first plug-in portions 120 are arranged at intervals along the circumference of the first separating member 100, and a first plug-in groove 130 is provided between two adjacent first plug-in portions 120; a first end of the second separating member 200 is provided with a plurality of second plug-in portions 210, the plurality of second plug-in portions 210 are arranged at intervals along the circumference of the second separating member 200, and a second plug-in groove 220 is provided between two adjacent second plug-in portions 210; the second plug-in portions 210 are arranged in the first plug-in grooves 130 one-to-one, and the first plug-in portions 120 are arranged in the second plug-in grooves 220 one-to-one.

[0038] In the above structure, through the corresponding arrangement of multiple first plug-in parts 120 and second plug-in parts 210, and the spaced layout of the first plug-in slot 130 and the second plug-in slot 220, it can be ensured that the first separation member 100 and the second separation member 200 can be accurately positioned when connected. This positioning method avoids the problem of misalignment that may occur in the traditional connection method, thereby ensuring the stability and reliability of the connection. In addition, the above-mentioned plug-in connection method can also effectively disperse the load and improve the overall strength of the structure. In this way, the first separation member 100 and the second separation member 200 can adapt to various complex working environments, such as harsh conditions such as high pressure or vibration.

[0039] Reference Figure 2 In some embodiments of the present invention, a connecting portion is provided at the second end of the first separating member 100 , and an external thread 110 is provided at the connecting portion. An internal thread 230 is provided inside the second end of the second separating member 200 .

[0040] In the above structure, an external thread 110 is provided at the second end of the first separator 100, so that the first separator 100 can be better connected to the liquid supply pipeline or the liquid supply rod. An internal thread 230 is provided inside the second end of the second separator 200, so that the second separator 200 can be better connected to the fracturing device or the plugging device.

[0041] In some possible embodiments, the extension portion 260 is inserted into the fixing gap 440, and the overlapping length of the extension portion 260 and the fixing gap 440 is 1 mm-5 mm. Specifically, the overlapping length of the extension portion 260 and the fixing gap 440 can be 2.5 mm. The depth of the first limiting groove 420 is 1 mm-5 mm, and specifically, the depth of the first limiting groove 420 can be 1.5 mm.

[0042] In some possible embodiments, a plurality of limiting holes 140 are provided, and the plurality of limiting holes 140 are arranged at intervals along the circumference of the first separation member 100, and the limiting member 300, the first limiting groove 420 and the limiting holes 140 are arranged in a one-to-one correspondence. By providing a plurality of limiting holes 140, the force between the first separation member 100 and the second separation member 200 can be made more uniform.

[0043] When the packer assembly fails or is pressed by the coal seam and cannot be removed, an external axial force is applied to pull the first separator 100. At this time, an instantaneous force is given to the first separator 100. When the instantaneous pulling force is large enough, the plug-in part between the limit member 300 and the limit hole 140 is instantly destroyed. When the sleeve 400 is separated from the constraint of the limit member 300, it will instantly move about 3 mm with the first separator 100. At this time, the fixing gap 440 is separated from the extension part 260, and the first separator 100 continues to move downward, 350 is separated from the second limit groove 150 to achieve separation of the two, leaving the second separator 200 and the upper blocker thereof inside the deep hole, and the first separator 100 is pulled out of the deep hole.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A deep hole fracturing separator, characterized in that: include: A first separation member (100); A second separating member (200) connected to the first separating member (100) via a sliding sleeve (400); A limiting member (300), wherein the first separation member (100) and the sliding sleeve (400) are connected in a limiting manner via the limiting member (300); The limiting member (300) is used to release the limiting under the action of a pulling force. When the limiting member (300) releases the limiting of the first separating member (100) and the sliding sleeve (400), the sliding sleeve (400) releases the limiting between the first separating member (100) and the second separating member (200).

2. The deep hole fracturing separator according to claim 1, characterized in that: A cavity is provided inside the first separation member (100), and an opening is provided at a first end of the first separation member (100), the opening is communicated with the cavity, and a limiting hole (140) is provided on a side wall of the first separation member (100); The sliding sleeve (400) is arranged inside the cavity, and a first limiting groove (420) is provided on the outer wall of the sliding sleeve (400). The limiting member (300) passes through the limiting hole (140) and is connected to the first limiting groove (420) in a limiting manner.

3. The deep hole fracturing separator according to claim 2, characterized in that: The inner wall of the first separation member (100) is provided with a plurality of second limiting grooves (150); A plurality of plug-in strips (240) are provided at the first end of the second separating member (200), and the plurality of plug-in strips (240) are arranged at intervals along the circumference of the second separating member (200) and are arranged one-to-one corresponding to the second limiting grooves (150). A protrusion (250) is provided at one end of the plug-in strip (240) away from the second separating member (200), and the protrusion (250) is connected to the second limiting groove (150) in a limiting manner.

4. The deep hole fracturing separator according to claim 3, characterized in that: A locking gap (440) is provided at one end of the sliding sleeve (400) facing the plug-in strip (240); An extension portion (260) is provided at one end of the protrusion (250) that is away from the plug-in strip (240), and the extension portion (260) is position-limitingly connected to the locking gap (440).

5. The deep hole fracturing separator according to any one of claims 2 to 4, characterized in that: A first sealing ring (410) and a second sealing ring (430) are provided between the sliding sleeve (400) and the first separating member (100), and the first sealing ring (410) and the second sealing ring (430) are respectively located on both sides of the first limiting groove (420).

6. The deep hole fracturing separator according to any one of claims 1 to 4, characterized in that: A first end of the first separation member (100) is provided with a plurality of first plug-in portions (120), the plurality of first plug-in portions (120) are arranged at intervals along the circumference of the first separation member (100), and a first plug-in groove (130) is provided between two adjacent first plug-in portions (120); A plurality of second plug-in parts (210) are provided at the first end of the second separation member (200), the plurality of second plug-in parts (210) are arranged at intervals along the circumference of the second separation member (200), and a second plug-in groove (220) is provided between two adjacent second plug-in parts (210); The second plug-in portions (210) are arranged in a one-to-one correspondence with the first plug-in slots (130), and the first plug-in portions (120) are arranged in a one-to-one correspondence with the second plug-in slots (220).

7. The deep hole fracturing separator according to claim 6, characterized in that: The second end of the first separating member (100) is provided with a connecting portion, the connecting portion is provided with an external thread (110), and the second end of the second separating member (200) is internally provided with an internal thread (230).

8. The deep hole fracturing separator according to claim 4, characterized in that: The extension portion (260) is inserted into the fixing gap (440), and the overlapping length between the extension portion (260) and the fixing gap (440) is 1 mm to 5 mm.

9. The deep hole fracturing separator according to claim 2, characterized in that: The depth of the first limiting groove (420) is 1 mm-5 mm.

10. The deep hole fracturing separator according to claim 2, characterized in that: A plurality of the limiting holes (140) are provided, and the plurality of limiting holes (140) are arranged at intervals along the circumference of the first separation member (100), and the limiting member (300), the first limiting groove (420) and the limiting holes (140) are arranged in a one-to-one correspondence.

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