Hole packer anti-reversion device applied to hydraulic fracturing construction process

Abstract

The utility model discloses a hole packer anti-backlash device applied to a hydraulic fracturing construction process, and aims to solve the problem that a packer is easy to backlash and fly out in a high-pressure state in the hydraulic fracturing construction process. Comprising an anti-leaping device body and a plurality of fixing anchor rods. The anti-jumping device is characterized in that the anti-jumping device body comprises a metal plate, a connecting mechanism and a connecting chain, and the connecting mechanism comprises two reserved anchor rod fixing holes, a reserved center hole and two connecting chain hanging lugs; the two reserved anchor rod fixing holes are symmetrically formed in the positions, close to the two ends, of the metal plate, the reserved center hole is formed in the center of the metal plate, the two hanging lugs are fixedly installed on the positions, close to the two ends, of one side of the metal plate, and the connecting chain is connected with the metal plate through the hanging lugs. According to the utility model, the metal plate is arranged at the fracturing hole by using the fixed anchor rod and the iron chain, so that the back-flushing impact force of the packer is reduced, and the effects of preventing the internal packer from flushing out of a drill hole and improving the safety during hydraulic fracturing operation can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of coal and rock mining, in particular to a packer anti-jumping device during hydraulic fracturing construction, which can prevent a packer from recoil and fly out under high pressure and improve the safety of roof hydraulic fracturing operations. Background Art

[0002] During underground coal mining, rock formations can easily become unstable under hard roof conditions, threatening mine safety. Hydraulic fracturing is commonly used to create cracks in the roof, releasing some of the stress and increasing its stability.

[0003] In the past, during the hydraulic fracturing process, the packer was first selected according to the target fracturing requirements, and the packer was connected to the water injection steel pipe. It was then sent into the hole using a drilling rig or manually, and the water injection steel pipe was gradually connected in sequence. The connected water injection steel pipe was continuously pushed into the borehole, and fracturing was performed at the predetermined design position. In this method, at the end of hydraulic fracturing, during the process of the packer shrinking, the rock formation is closed under the action of the mine pressure, resulting in the backflow of high-pressure water that has been pressed into the roof rock formation. The backflowing high-pressure water acts on the packer, causing the packer to be rushed outward at high speed. The strong impact force poses a safety hazard to the fracturing equipment and personnel. Summary of the Invention

[0004] In view of the above-mentioned technical deficiencies, the purpose of the present invention is to provide a sealer anti-backlash device used in the hydraulic fracturing construction process, which can prevent the sealer from backwashing and flying out under high pressure conditions, thereby improving the safety of top plate hydraulic fracturing operations.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A hole sealer anti-backlash device used in a hydraulic fracturing construction process comprises an anti-backlash device body and a plurality of fixed anchor rods; the anti-backlash device body comprises a metal plate, a connecting mechanism and a connecting chain, the connecting mechanism comprises two reserved fixed anchor rod holes, a reserved center hole and two connecting chain hanging ears; the two reserved fixed anchor rod holes are symmetrically arranged on the metal plate near the two end positions, the reserved center hole is arranged at the center position of the metal plate, the two hanging ears are fixedly installed on one side of the metal plate near the two end positions, and the connecting chain is connected to the metal plate through the hanging ears.

[0007] The beneficial effects of the present invention are: the present invention has a simple structure and is easy to disassemble; by using fixed anchor rods and iron chains, the metal plate is installed at the fracturing hole, which reduces the impact force of the packer backwash, can prevent the internal packer from rushing out of the drill hole, and improve the safety during hydraulic fracturing operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only 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.

[0009] Figure 1 This is a structural schematic diagram of the use status of a sealing device and anti-backflow device applied in a hydraulic fracturing construction process according to an embodiment of the utility model.

[0010] Figure 2 for Figure 1 A partial enlarged view of the .

[0011] Figure 3 This is a schematic diagram of the main structure of the anti-jumping device according to an embodiment of the present utility model.

[0012] Among them, the accompanying drawings are marked as: 1. Metal plate; 11. Reserved center hole; 12. Reserved fixed anchor hole; 2. Hanging ear; 3. Connecting chain; 4. Hollow steel pipe; 5. Packer; 6. Fixed anchor; 7. Water injection pipe. DETAILED DESCRIPTION

[0013] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0014] Example 1

[0015] like Figure 1-Figure 3 As shown, a hole sealer anti-bounce device used in hydraulic fracturing construction, including an anti-bounce device body and multiple fixed anchor rods 6; the anti-bounce device body comprises a metal plate 1, a reserved center hole 11, reserved holes 12 for fixed anchor rods 6, and a connecting chain 3. The two reserved holes 12 for fixed anchor rods 6 are symmetrically arranged on the metal plate 1 near the ends, the reserved center hole 11 is arranged at the center of the metal plate 1, two hanging ears 2 are fixedly installed on one side of the metal plate 1 near the ends, and the connecting chain 3 is connected to the metal plate 1 via the hanging ears 2. The fixed anchor rods 6 and the connecting chain 3 cooperate with each other.

[0016] The metal plate 1 is made of a light and high-strength material. While meeting the structural strength requirements, it is also lightweight and easy to carry.

[0017] The connection mechanism is designed to consist of 6 holes 12 for fixing anchor rods, a reserved center hole 11, and a connecting chain 3 hanging ear 2. When in use, the metal plate 1 is fixed to the top plate using the anchor rod, and the connecting chain 3 is connected to the hanging ear 2, which can realize an indirect connection between the metal plate 1 and the bracket. The structure is simple and easy to install and disassemble.

[0018] Working principle:

[0019] During use, the two packers 5 are connected in series via a high-pressure pipe. The hollow steel pipe 4 is then connected to the packers 5 via a joint. The other end of the hollow steel pipe 4 is then passed through the reserved center hole 11 on the anti-bubble device. The fixed anchor rod 6 is passed through the reserved hole in the metal plate 1 and fixed into the pre-drilled anchor rod hole around the hydraulic fracturing hole, thus achieving a fixed connection between the metal plate 1 and the roadway roof. The connecting chain 3 is securely connected to the nearest hydraulic support top beam. The assembled fracturing equipment is moved to the set position. When the packer 5 is inserted into the predetermined position in the drilled hole, the device is placed close to the hole mouth. After completion, the water injection pipe 7 is opened to begin the hydraulic fracturing operation.

[0020] When high-pressure water flows back into the packer 5, with the help of the cooperation of the fixed anchor rod 6 and the connecting chain 3, the firm connection between the anchor rod and the top plate and the fixed connection between the connecting chain 3 and the hydraulic support provide stable supporting force, thereby minimizing the possibility of the packer 5 rushing out of the fracturing hole.

[0021] The diameter of the reserved center hole 11 of the metal plate 1 needs to be larger than the hollow steel pipe 4 and smaller than the diameter of the sealer; when high-pressure water flows back into the sealer 5 or high-pressure water injection occurs, the sealer 5 capsule ruptures, and the sealer 5 flies out of the fracturing hole under pressure. Since the diameter of the hollow steel pipe 4 is smaller than the reserved center hole 11 of the metal plate 1, the hollow steel pipe 4 can be unaffected and move freely in the hole, while the diameter of the sealer 5 is larger than the reserved center hole 11. When the sealer 5 rushes out, it hits the metal plate 1. Due to the action of the anchor rod and the fixation between the connecting chain 3 and the hydraulic support, the impact force is absorbed, and the sealer 5 is not easy to rush out of the fracturing hole. The device can realize pressure relief when the sealer 5 rushes out, prevent the sealer 5 from rushing out, avoid damage to the hydraulic fracturing device and safety threats to personnel.

[0022] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A hole sealer anti-bounce device used in a hydraulic fracturing construction process, comprising an anti-bounce device body and a plurality of fixed anchor rods; characterized in that: The anti-jumping device body includes a metal plate, a connecting mechanism and a connecting chain. The connecting mechanism includes two reserved fixing anchor holes, a reserved center hole and two connecting chain hanging ears; the two reserved fixing anchor holes are symmetrically opened on the metal plate near the two ends, the reserved center hole is opened at the center of the metal plate, the two hanging ears are fixedly installed on one side of the metal plate near the two ends, and the connecting chain is connected to the metal plate through the hanging ears.

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