Energy-gathering isolating and sealing expansion pipe connecting structure for hydraulic fracturing operation
By adding a through-pipe joint and high-pressure hose to the energy-condensing expansion tube connection structure, the connection method between the expansion tube is optimized, and the hard connection to soft connection is changed, which solves the problems of inconvenient installation, easy damage and low reuse rate of energy-condensing expansion tube, and achieves higher flexibility and safety.
Patent Information
- Application Number
- CN202421669682.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-15
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2034-07-15
AI Technical Summary
During the prevention and control of impact ground pressure of coal mines, the hard connection between the energy-concentrating and partitioning expansion pipes leads to inconvenient installation and easy damage, low reuse rate, and high safety risks in the pinching process.
A concentrating energy-sealing expansion tube connection structure is adopted. By adding a through-pipe joint at the hard connection end of the jet rod, and pre-processing of high-pressure hose between the through-pipe joints, the connection between the expansion tubes is optimized to a soft connection of the hose.
It improves the bending and flexibility of the expansion string, reduces the scraping resistance, reduces the loss and cost of the expansion tube, improves the convenience and safety of pinch connection, and enhances the reuse rate of the energy-concentrating and partitioning expansion tube.
Smart Images
Figure CN222782624U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of safe production of coal mines, in particular to an energy-gathering isolation expansion pipe connection structure used for hydraulic fracturing operations. Background Art
[0002] In the prevention and control of rock burst in coal mines, in addition to blasting to relieve pressure on the roof and floor, another method of pressure relief is used, that is, drilling holes and using hydraulic fracturing equipment and facilities to fracture and relieve pressure on the holes to achieve the purpose of fracturing the hard rock. The energy-gathering isolation expansion tubes used in the holes are easily scratched and damaged during the process of entering or withdrawing from the holes, and the reuse rate is low, resulting in increased loss of the expansion tubes. In addition, it is not easy to pinch the expansion tubes when placing them in the hole or withdrawing them. The traditional method is to directly use a jet rod to hard-connect two expansion tubes to form an expansion string. However, due to the actual conditions in the borehole, the hard connection can easily damage the expansion tube. A spacious space is required for on-site splicing of the expansion tube. At the same time, a pipe clamp is required for splicing, which makes it difficult to splice at high altitudes and poses a serious safety risk. Therefore, in order to reduce the loss of the expansion tube, meet on-site construction conditions, and reduce the safety risks of personnel operations, it is necessary to modify the connection method between the expansion strings to increase the curvature and flexibility of the expansion string, improve the reuse rate of the expansion tube and the convenience of splicing, so as to achieve the purpose of reducing the safety risks of personnel operations and improving the overall installation rate of the energy-gathering isolation expansion tube. Utility Model Content
[0003] The utility model provides an energy-gathering isolation expansion pipe connection structure for hydraulic fracturing operations to solve the problems existing in the above background.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] A connection structure of an energy-gathering isolation expansion tube for hydraulic fracturing operations comprises a first energy-gathering isolation expansion tube and a second energy-gathering isolation expansion tube, wherein one side of the first energy-gathering isolation expansion tube is fixedly connected to a first straight pipe joint, and the second energy-gathering isolation expansion tube and the corresponding side of the first energy-gathering isolation expansion tube are also fixedly connected to the first straight pipe joint, and a high-pressure rubber hose is detachably connected between the first straight pipe joints.
[0006] Further, a connecting rod is connected to one side of the first energy-gathering isolation and expansion tube, and the first straight-through pipe joint located on one side of the first energy-gathering isolation and expansion tube is connected to the connecting rod.
[0007] Furthermore, a jet rod is connected to one side of the second energy-gathering isolation and expansion tube, and the first straight-through pipe joint located on one side of the second energy-gathering isolation and expansion tube is connected to the jet rod.
[0008] Furthermore, second straight pipe joints are provided on both sides of the high-pressure rubber hose, and the first straight pipe joints are detachably connected to the second straight pipe joints.
[0009] The utility model has the following beneficial effects:
[0010] The utility model provides an energy-gathering isolation expansion pipe connection structure for hydraulic fracturing operations, which is mainly composed of expansion pipes, connecting rods, jet rods, pipe joints and high-pressure hoses. By adding straight pipe joints to the hard-connected ends of the jet rods between the existing energy-gathering isolation expansion pipes, and then pre-processing the high-pressure hoses of the straight pipe joints between the straight pipe joints, the connection of the jet rods between the expansion pipes is optimized to a soft connection of the hose, which effectively improves the curvature and flexibility of the expansion string, reduces the scraping resistance, and achieves the purpose of cost saving. At the same time, it improves the convenience of pinching between the expansion pipes, reduces the safety risks of construction workers, and solves the problem that in the current process of preventing and controlling coal mine impact ground pressure, the expansion pipes are usually inconvenient to install, easy to damage, and have a low reuse rate due to the commonly used hard connection method of connecting the jet rods between the energy-gathering isolation expansion pipes. The curvature and flexibility of the expansion string are greatly affected.
[0011] The utility model increases the bendability of the energy-gathering isolation expansion string during use. No matter it is lowered into the borehole or withdrawn, the flexibility of the expansion string is increased, so that it can more effectively adapt to the actual operation needs in the borehole, reduce the loss of the expansion tube, save costs, and make the splicing of the expansion tube more convenient, quick and safe. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model.
[0013] Figure 2 This is a schematic diagram of the structure of the high-pressure hose of the utility model.
[0014] The meanings of the reference numerals are as follows:
[0015] 1. The first energy-gathering isolating expansion tube; 2. The second energy-gathering isolating expansion tube; 3. The connecting rod; 4. The first straight pipe joint; 5. The jet rod; 6. The second straight pipe joint; 7. The high-pressure rubber hose. DETAILED DESCRIPTION
[0016] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.
[0017] like Figure 1-2As shown, a connection structure of an energy-gathering isolation expansion tube for hydraulic fracturing operations includes a first energy-gathering isolation expansion tube 1 and a second energy-gathering isolation expansion tube 2, one side of the first energy-gathering isolation expansion tube 1 is fixedly connected with a first straight pipe joint 4, and the second energy-gathering isolation expansion tube 2 and the first energy-gathering isolation expansion tube 1 The corresponding side is also fixedly connected with the first straight pipe joint 4, and a high-pressure rubber hose 7 is detachably connected between the first straight pipe joints 4.
[0018] A connecting rod 3 is connected to one side of the first energy-gathering isolation and expansion tube 1 , and the first straight-through pipe joint 4 located on one side of the first energy-gathering isolation and expansion tube 1 is connected to the connecting rod 3 .
[0019] A jet rod 5 is connected to one side of the second energy-gathering isolation expansion tube 2 , and the first straight pipe joint 4 located on one side of the second energy-gathering isolation expansion tube 2 is connected to the jet rod 5 .
[0020] Second straight pipe joints 6 are provided on both sides of the high-pressure rubber hose 7, and the first straight pipe joints 4 are detachably connected to the second straight pipe joints 6.
[0021] When the utility model is used in practice, firstly, a connecting rod 3 is installed below the first energy-gathering isolation expansion tube 1, and a φ19mm first straight pipe joint 4 is welded to the tail end of the connecting rod 3, and then a φ19mm first straight pipe joint 4 is also welded to the top threaded end of the jet rod 5, and then a high-pressure hose 7 with a total length of 180mm and a diameter of φ19mm is processed and manufactured. Both ends of the high-pressure hose 7 are second straight pipe joints 6 with a diameter of φ19mm, and the high-pressure hose 7 should not be too long, otherwise it will be flexible and lack toughness, and a total length of 180mm is appropriate. When in use, the improved accessories are connected as follows: Figure 1 As shown in the figure, the upper and lower ends are respectively connected to the first energy-gathering isolation expansion tube 1 and the second energy-gathering isolation expansion tube 2, and the operating personnel coordinate and cooperate to send them into the borehole. After the fracturing construction is completed, the expansion string is withdrawn to the hole mouth, and finally they are pinched open in sequence to carry out the next cycle of hydraulic fracturing construction. The optimized overall connection structure of the first energy-gathering isolation expansion tube 1 and the second energy-gathering isolation expansion tube 2 effectively solves the problem that in the process of preventing and controlling coal mine impact ground pressure, the first energy-gathering isolation expansion tube 1 and the second energy-gathering isolation expansion tube 2 are generally connected by a hard connection of the jet rod 5, which usually leads to the expansion tube being inconvenient to install, easy to damage and having a low reuse rate, and having a great impact on the curvature and flexibility of the expansion string. Therefore, the connection structure has good practicality.
Claims
1. A connection structure of an energy-gathering isolation and expansion pipe for hydraulic fracturing operation, comprising a first energy-gathering isolation and expansion pipe (1) and a second energy-gathering isolation and expansion pipe (2), characterized in that: One side of the first energy-gathering isolating expansion tube (1) is fixedly connected to a first straight pipe joint (4), and the corresponding sides of the second energy-gathering isolating expansion tube (2) and the first energy-gathering isolating expansion tube (1) are also fixedly connected to the first straight pipe joint (4), and a high-pressure rubber hose (7) is detachably connected between the first straight pipe joints (4).
2. The energy-gathering isolation expansion pipe connection structure for hydraulic fracturing operation according to claim 1 is characterized in that: A connecting rod (3) is connected to one side of the first energy-gathering isolating expansion tube (1), and a first straight-through pipe joint (4) located on one side of the first energy-gathering isolating expansion tube (1) is connected to the connecting rod (3).
3. The energy-gathering isolation expansion pipe connection structure for hydraulic fracturing operation according to claim 1 is characterized in that: A jet rod (5) is connected to one side of the second energy-gathering isolation expansion tube (2), and a first straight pipe joint (4) located on one side of the second energy-gathering isolation expansion tube (2) is connected to the jet rod (5).
4. The energy-gathering isolation expansion pipe connection structure for hydraulic fracturing operation according to claim 1 is characterized in that: Second straight pipe joints (6) are provided on both sides of the high-pressure rubber hose (7), and the first straight pipe joints (4) are detachably connected to the second straight pipe joints (6).