Deep hole fracturing separator

Abstract

The utility model relates to the technical field of hydraulic fracturing under a mine, and discloses a deep hole fracturing separator which comprises a first separation pipe, a second separation pipe and a third separation pipe, and a containing cavity is formed in the inner side wall of one end of the first separation pipe; the clamping piece and the sliding ball are embedded in the containing cavity, and the sliding ball is movably connected into the containing cavity and is arranged opposite to the clamping piece; one end of the second separation pipe extends into one end of the first separation pipe and is opposite to the clamping piece and the sliding ball, the clamping piece can move between a first position and a second position, the first separation pipe and the second separation pipe are in interference fit with the clamping piece at the first position, and the first separation pipe and the second separation pipe are in interference fit with the clamping piece at the second position. The sliding ball selectively extrudes the clamping piece to move towards the cavity wall of the containing cavity, so that the clamping teeth are separated from the second separation pipe. In the normal working state, the clamping piece is in interference fit with the first separation pipe and the second separation pipe, and when a fault occurs in the deep hole, separation of the first separation pipe and the second separation pipe can be rapidly achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of hydraulic fracturing under mine, especially relates to a deep hole fracturing separator. BACKGROUND

[0002] As a key means of gas efficient extraction and roof disaster control, the operation process of hydraulic fracturing technology relies on fracturing device to block the borehole and inject high-pressure liquid to fracture the coal seam or rock stratum. However, the existing fracturing device has obvious defects: when the fracturing hole collapses or the fracturing equipment fails, the fracturing device and the blocking device are easy to be stuck in the deep hole. This not only makes it difficult to pull out the liquid supply pipeline and the fracturing device, leading to the scrap of the deep hole, but also seriously affects the efficiency and safety of coal mining.

[0003] In the current deep hole fracturing separator technology, the patent document with the announcement number CN222615321U and the name of a deep hole fracturing separator provides a representative design scheme. The core technical points of this scheme are to realize the separation function when the end assembly in the deep hole fails through the ingenious combination of the first separating piece, the second separating piece and the limiting piece. Specifically, the second separating piece is connected with the first separating piece through the sliding sleeve, and the limiting piece penetrates the limiting hole in the side wall of the first separating piece and is connected with the first limiting groove in the outer wall of the sliding sleeve. Under normal working conditions, the limiting piece can effectively limit the relative position between the first separating piece and the sliding sleeve and between the first separating piece and the second separating piece, ensuring the structural stability and connection reliability of the entire separator. Once the end assembly in the deep hole fails, by applying a pulling force to the first separating piece, the limiting piece can be released from the limiting under the action of the pulling force, so that the sliding sleeve loses the constraint, and then the limiting between the first separating piece and the second separating piece is released, realizing the separation of the two, so that the instrument connected to the first separating piece can be pulled out, and the second separating piece and the faulty device connected thereto are discarded, to deal with the engineering failure with the least loss.

[0004] However, although this design can solve some problems in the prior art in theory, it still has significant defects in actual application. Since the limiting piece needs to be released from the limiting under the action of the pulling force, the insertion part of the limiting piece and the limiting hole may be loose and fall off under the influence of long-term high-pressure liquid impact and underground equipment vibration, affecting the normal work of the equipment, and even separating in advance when the failure condition that needs to be separated is not reached, leading to the failure of the fracturing operation.

[0005] In view of the defects of the above-mentioned prior art, it is of great significance to develop a stable and reliable deep hole fracturing separator. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing a deep hole fracturing separator to overcome the above-mentioned deficiencies.

[0007] In order to achieve the above-mentioned purposes, the technical scheme of the utility model is:

[0008] A deep hole fracturing separator, comprising:

[0009] A first separation pipe, the inner side wall of one end of the first separation pipe is recessed towards the outside to form a containing cavity;

[0010] A clamping piece and a sliding ball embedded in the containing cavity, the inner side of the clamping piece is provided with clamping teeth, the sliding ball is movably connected in the containing cavity and is oppositely arranged with the clamping piece; and

[0011] A second separation pipe, one end of the second separation pipe extends into the interior of one end of the first separation pipe and is oppositely arranged with the clamping piece and the sliding ball, the clamping piece is movable between a first position and a second position, in the first position, the first separation pipe and the second separation pipe are respectively in interference fit with the clamping piece, in the second position, the sliding ball selectively extrudes the clamping piece to move towards the cavity wall of the containing cavity, so as to realize the disengagement of the clamping teeth and the second separation pipe.

[0012] Further, the clamping piece is snail-shaped, comprising a clamping part and a fixed part fixedly connected, the fixed part is located on the side of the clamping part close to the other end of the first separation pipe, the clamping teeth are located on the inner side of the clamping part and gradually narrow in the direction close to the fixed part, and the fixed part extends towards the outside to form a circular ring;

[0013] The containing cavity comprises a clamping cavity and a fixed cavity connected in communication, the clamping part and the sliding ball are arranged in the clamping cavity, the clamping cavity opposite to the outer side of the clamping part gradually extends towards the interior on the side close to the fixed cavity, in the first position, the clamping part is in interference fit with the narrow end of the clamping cavity, in the second position, the clamping part abuts against the wide end of the clamping cavity, the fixed cavity is an annular cavity, and the fixed part is arranged in the fixed cavity in a slidable manner along the axial direction of the first separation pipe.

[0014] Further, the end surface of the clamping part close to the sliding ball is provided with an inner concave surface, the sliding ball is located on the side of the clamping part close to the other end of the second separation pipe, and the sliding ball can extrude the inner concave surface and drive the clamping part to be located in the second position.

[0015] Further, two sealing rings are arranged between one end of the first separation pipe and one end of the second separation pipe, and the two sealing rings are respectively located on the two sides of the containing cavity along the axial direction of the first separation pipe.

[0016] Further, a plurality of sliding balls are arranged, and the plurality of sliding balls are arranged in a circumferential interval along the axial direction of the first separation pipe.

[0017] Furthermore, it also includes an annular sleeve, which is movably disposed within the snap-fit ​​cavity, and several sliding balls are fixedly connected to the annular sleeve.

[0018] Furthermore, a plurality of insertion slots are provided on the outer side wall of one end of the first separation tube, and a plurality of insertion strips are provided on the outer side wall of the middle part of the second separation tube. The plurality of insertion strips are arranged at intervals along the circumference of the second separation tube and are respectively arranged in the plurality of insertion slots.

[0019] Furthermore, the inner side of the connector strip is provided with a protrusion, and the connector groove is provided with a groove that matches the protrusion, and the protrusion and the groove engage in a snap-fit ​​fit.

[0020] Furthermore, the outer wall of the other end of the first separation tube is provided with an external thread, and the outer wall of the other end of the second separation tube is provided with an internal thread.

[0021] Compared with the prior art, this utility model has at least the following advantages:

[0022] Under normal operating conditions, the clamping components are in an interference fit with both the first and second separation tubes, ensuring the structural stability of the entire separator and thus guaranteeing the smooth progress of fracturing operations. When a fault occurs within the deep borehole, applying a thrust followed by a pull force to the first separation tube allows for rapid separation of the first and second separation tubes. This prevents the entire deep borehole from being rendered unusable due to equipment jamming, reducing economic losses and improving work efficiency. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall structure of the deep-hole fracturing separator of this utility model;

[0025] Figure 2 This is a cross-sectional view of the deep-hole fracturing separator of this utility model;

[0026] Figure 3 This utility model Figure 2 A magnified view of a portion of region A in the middle;

[0027] Figure 4 This is a schematic diagram of the structure of the first separation tube of this utility model;

[0028] Figure 5 It is a structural schematic view of the second separation pipe of the utility model;

[0029] Figure 6 It is a structural schematic view of the utility model clamping piece;

[0030] Figure 7 It is an assembly schematic view of the annular hoop sleeve and the sliding ball of the utility model.

[0031] Reference signs: 1, first separation pipe; 2, containing cavity; 3, clamping piece; 4, sliding ball; 5, second separation pipe; 6, sealing ring; 7, annular hoop sleeve; 8, plug-in slot; 9, plug-in strip; 10, protrusion; 11, recess; 201, clamping cavity; 202, fixed cavity; 301, clamping part; 302, inner concave surface; 303, fixed part; 304, clamping tooth. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0033] In order to make the above-mentioned purposes, features and advantages of the utility model more apparent, obvious and easy to understand, the utility model will be further described in detail below with reference to the drawings and specific embodiments.

[0034] With reference to Figures 1-3 The utility model provides a kind of deep hole fracturing separator, including first separation pipe 1, second separation pipe 5, clamping piece 3, sliding ball 4.

[0035] Among them, the inner side wall of first separation pipe 1 one end is recessed to outside and forms containing cavity 2. Clamping piece 3 and sliding ball 4 are embedded in containing cavity 2, and the inner side of clamping piece 3 is provided with clamping tooth 304, sliding ball 4 is movably connected in containing cavity 2, and it is oppositely arranged with clamping piece 3. Second separation pipe 5 one end extends into the inside of first separation pipe 1 one end, and it is oppositely arranged with clamping piece 3 and sliding ball 4, clamping piece 3 is movable between first position and second position, in first position, first separation pipe 1, second separation pipe 5 is respectively with clamping piece 3 interference fit, in second position, sliding ball 4 selectively extrudes clamping piece 3 to the cavity wall of containing cavity 2 movement, to realize that clamping tooth 304 is separated from second separation pipe 5.

[0036] Specifically, the inner side wall of one end of the first separation pipe 1 is recessed towards the outside to form a containing cavity 2, which comprises a clamping cavity 201 and a fixing cavity 202 connected in communication, wherein the clamping cavity 201 gradually extends towards the inside near the fixing cavity 202. Figure 6 The clamping piece 3 is snail-shaped and comprises a clamping part 301 and a fixing part 303. The clamping part 301 and the sliding ball 4 are located in the clamping cavity 201, the outside of which is matched with the clamping cavity 201, the clamping part 301 gradually narrows in the direction close to the fixing part 303, and the clamping teeth 304 are located on the inside of the clamping part 301. In the first position, the clamping teeth 304 are in interference fit with the narrow end of the clamping cavity 201, and in the second position, the clamping teeth 304 abut against the wide end of the clamping cavity 201. The fixing part 303 is located on the side of the clamping part 301 close to the other end of the first separation pipe 1, is annular and extends into the fixing cavity 202, and can slide axially along the first separation pipe 1. The end face of the clamping part 301 close to the sliding ball 4 has an inner recess 302. The fixing cavity 202 is an annular cavity, and the fixing part 303 is arranged in the fixing cavity 202 in a slidable manner in the axial direction of the first separation pipe 1.

[0037] The second separation pipe 5 extends into the inside of one end of the first separation pipe 1 and is arranged opposite to the clamping piece 3 and the sliding ball 4. Two sealing rings 6 are arranged between the one end of the first separation pipe 1 and the one end of the second separation pipe 5, and the two sealing rings 6 are respectively located on the two sides of the containing cavity 2 in the axial direction of the first separation pipe 1.

[0038] The sliding ball 4 is provided in plurality, and the plurality of sliding balls 4 are arranged at intervals in the axial direction of the first separation pipe 1. In addition, in order to realize the limiting of the sliding ball 4, the utility model also provides an annular hoop 7, which is arranged in the containing cavity 2. Figure 5 The annular hoop 7 is arranged in the containing cavity 2, and the plurality of sliding balls 4 are fixedly connected on the annular hoop 7.

[0039] Referring to Figures 4-5 The outer side wall of one end of the first separation pipe 1 is provided with a plurality of plug-in grooves 8, and the outer side wall of the middle part of the second separation pipe 5 is provided with a plurality of plug-in strips 9, which are arranged at intervals in the circumferential direction of the second separation pipe 5 and are arranged in the plurality of plug-in grooves 8 one by one. The inner side of the plug-in strip 9 is provided with a protrusion 10, and the plug-in groove 8 is provided with a groove 11 matched with the protrusion 10, and the protrusion 10 and the groove 11 are clamped and matched.

[0040] The outer side wall of the other end of the first separation pipe 1 is provided with external threads for connecting with a liquid supply pipeline or a liquid supply rod body, and the outer side wall of the other end of the second separation pipe 5 is provided with internal threads for connecting with a fracturing device or a plugging device.

[0041] The utility model discloses a deep hole fracturing separator, which comprises a first separation pipe, a second separation pipe, a clamping piece, a sliding ball, a ring-shaped hoop sleeve, a first sealing ring and a second sealing ring.

[0042] If the fracturing hole collapses, is crushed or the fracturing equipment itself fails, causing the second separation pipe 5 to be stuck in the deep hole, the operator can apply an axial instantaneous pushing force to the first separation pipe 1. This will cause the sliding ball 4 to press the inner concave surface 302 of the clamping piece 3, prompting the clamping piece 3 to move from the first position to the second position. In the second position, the clamping teeth 304 are disengaged from the second separation pipe 5. At this time, the operator applies an axial instantaneous pulling force to the first separation pipe 1, and the clamping connection between the insertion strip 9 and the insertion slot 8 is also released, thereby achieving the separation of the first separation pipe 1 and the second separation pipe 5. Continue to apply a pulling force to the first separation pipe 1, and the operator can pull out the first separation pipe 1 and the equipment connected thereto, while discarding the second separation pipe 5 and the faulty equipment connected thereto in the deep hole.

[0043] The deep hole fracturing separator has the following main beneficial effects:

[0044] In the normal working state, the clamping piece 3 is in interference fit with the first separation pipe 1 and the second separation pipe 5 respectively, ensuring the structural stability of the entire separator, thereby ensuring the smooth progress of the fracturing operation.

[0045] When a fault occurs in the deep hole, the separation of the first separation pipe 1 and the second separation pipe 5 can be quickly achieved by applying a pushing force to the first separation pipe 1 and then applying a pulling force, avoiding the situation that the entire deep hole is scrapped due to equipment being stuck, reducing economic losses and improving work efficiency.

[0046] The snail-shaped design of the clamping piece 3, the special structure of the containing cavity 2, and the cooperation of the sliding ball 4 and the ring-shaped hoop sleeve 7 enable the first separation pipe 1 and the second separation pipe 5 to maintain good performance in extreme working environments such as high pressure and high vibration, enhancing the adaptability and reliability of the equipment.

[0047] The two sealing rings 6 arranged between the first separation pipe 1 and the second separation pipe 5 effectively prevent the leakage of high-pressure liquid, improving the safety of the operation.

[0048] The first separation pipe 1 and the second separation pipe 5 are respectively provided with external threads and internal threads, facilitating quick connection and installation with other equipment and improving the convenience of operation.

[0049] In the description of the utility model, need understanding is, the term "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and so on indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawing, just for the convenience of describing the utility model, and it is not indicated or implied that the indicated device or element must have a particular orientation, a particular orientation and operation, so it can not be understood as a limitation on the utility model.

[0050] The above-described embodiments are merely preferred modes of the utility model, and do not limit the scope of the utility model, and various modifications and improvements to the technical solutions of the utility model made by those skilled in the art without departing from the design spirit of the utility model shall fall within the protection scope of the utility model claimed.

Claims

1. A deep-penetrating fracturing separator, characterized in that, The utility model relates to a detachable pipe joint, which comprises: a first detachable pipe (1) with a cavity (2) formed by a recessed inner wall at one end; a clamping piece (3) and a sliding ball (4) embedded in the cavity (2), the clamping piece (3) is provided with clamping teeth (304) on the inner side, and the sliding ball (4) is movably connected in the cavity (2) and arranged opposite to the clamping piece (3); and a second detachable pipe (5) inserted into the first detachable pipe (1) at one end and arranged opposite to the clamping piece (3) and the sliding ball (4), the clamping piece (3) is movable between a first position and a second position, in the first position, the first detachable pipe (1) and the second detachable pipe (5) are in interference fit with the clamping piece (3), in the second position, the sliding ball (4) selectively extrudes the clamping piece (3) to move towards the cavity wall of the cavity (2) to realize the disengagement of the clamping teeth (304) from the second detachable pipe (5). The clamping piece (3) is snail-shaped and comprises a clamping part (301) and a fixed part (303) fixedly connected, the fixed part (303) is located on the side of the clamping part (301) close to the other end of the first detachable pipe (1), the clamping teeth (304) are located on the inner side of the clamping part (301) and gradually narrow in the direction close to the fixed part (303), and the fixed part (303) extends outward to form a circular ring.

2. The deep-penetrating frac separator of claim 1, wherein, The cavity (2) comprises a clamping cavity (201) and a fixed cavity (202) connected in communication, the clamping part (301) and the sliding ball (4) are arranged in the clamping cavity (201), the clamping cavity (201) opposite to the outer side of the clamping part (301) gradually extends inward towards the side close to the fixed cavity (202), in the first position, the clamping part (301) is in interference fit with the narrow end of the clamping cavity (201), in the second position, the clamping part (301) abuts against the wide end of the clamping cavity (201), and the fixed cavity (202) is an annular cavity, and the fixed part (303) is slidably arranged in the fixed cavity (202) in the axial direction of the first detachable pipe (1). An inner concave surface (302) is arranged on the end face of the clamping part (301) close to the sliding ball (4), the sliding ball (4) is located on the side of the clamping part (301) close to the other end of the second detachable pipe (5), and the sliding ball (4) can extrude the inner concave surface (302) and drive the clamping part (301) to the second position.

3. The deep-penetrating frac separator of claim 2, wherein, Two sealing rings (6) are arranged between one end of the first detachable pipe (1) and one end of the second detachable pipe (5), and the two sealing rings (6) are respectively located on the two sides of the cavity (2) in the axial direction of the first detachable pipe (1).

4. The deep-penetrating frac separator of claim 3, wherein, A plurality of sliding balls (4) are arranged in a circumferential interval in the axial direction of the first detachable pipe (1).

5. The deep-penetrating frac separator of claim 4, wherein, ​ 6. The deep-penetrating frac separator of claim 5, wherein, Also include annular cuff (7), the annular cuff (7) is movably arranged in the clamping cavity (201), several sliding balls (4) are fixedly connected on the annular cuff (7).

7. The deep-penetrating frac separator of claim 6, wherein, The outer side wall of one end of the first separation pipe (1) is provided with a plurality of insertion grooves (8), the outer side wall of the middle part of the second separation pipe (5) is provided with a plurality of insertion strips (9), a plurality of the insertion strips (9) are arranged along the circumference of the second separation pipe (5) and are arranged in the plurality of insertion grooves (8) one by one.

8. The deep-penetrating frac separator of claim 7, wherein, The inner side of the insertion strip (9) is provided with a protrusion (10), the insertion groove (8) is provided with a groove (11) matched with the protrusion (10), and the protrusion (10) and the groove (11) are clamped and matched.

9. The deep-penetrating frac separator of claim 8, wherein, The outer side wall of the other end of the first separation pipe (1) is provided with an external thread, and the outer side wall of the other end of the second separation pipe (5) is provided with an internal thread.

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