High-pressure flexible fracturing hose

Abstract

The utility model discloses a high-pressure flexible fracturing hose which comprises a wear-resistant layer, a stress dispersion layer, a reinforcing layer and an outer rubber layer which are sequentially arranged from inside to outside, and a detection line is arranged in the wear-resistant layer in the length direction of the fracturing hose. The two ends of the detection line penetrate through the stress dispersion layer, the reinforcing layer and the outer rubber layer respectively and are electrically connected with a detection unit arranged on the outer circumference of the outer rubber layer. According to the high-pressure flexible fracturing hose, the detection line is embedded in the side, close to the stress dispersion layer, in the wear-resistant layer, the detection unit is used for monitoring on-off of the detection line and judging the wear degree of the wear-resistant layer, the detection efficiency is high, missing detection and misjudgment are avoided, shutdown detection is not needed, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to high pressure fracturing pipe technical field more specifically, the utility model relates to high pressure flexible fracturing hose. BACKGROUND

[0002] In the field of oil and gas exploration and exploitation, high pressure flexible fracturing hose, as a kind of key technical equipment, plays a vital role. With the continuous deepening of oil and gas field development, especially the expansion to deep sea, ultra-deep well and complex geological conditions, the performance requirements of the hose are increasingly improved. Traditional fracturing hoses often have difficulty in ensuring long-term stable operation when facing extreme operating environments such as high pressure, high temperature, high friction and corrosive fracturing fluid, and are prone to problems such as wear, leakage and even burst, which seriously restricts the efficiency and safety of oil and gas field development.

[0003] In order to cope with these challenges, the design and manufacture of high pressure flexible fracturing hose must be continuously innovated and optimized. Currently, there are various improved high pressure flexible fracturing hoses on the market, which mostly adopt a multi-layer composite structure, combining different materials and special process treatment to improve the pressure-bearing capacity, wear resistance, corrosion resistance and flexibility of the hose.

[0004] Patent document CN116817039A discloses a corrosion-resistant fracturing hose and its preparation method, belonging to the technical field of oil well control hose, comprising an inner liner, an inner rubber layer, a middle rubber layer and an outer rubber layer in sequence from inside to outside along the pipe diameter direction. The material of the inner liner is ultra-high molecular weight polyethylene composite material, and the inner rubber layer is provided as at least one layer. The middle rubber layer is provided as multiple layers, with a first layer and a last layer of the middle rubber layer each provided with a cord layer. From the second layer of the middle rubber layer to the last layer of the middle rubber layer, a steel wire winding layer is provided between the adjacent two layers of the middle rubber layer. The present application designs the formula of the inner liner and the warning layer without using additional adhesive. In addition, in order to make the adhesion between the rubber layers more compact, the present application also improves the preparation process, making the adhesion between the rubber layers higher, simplifying the production process and improving the processing efficiency.

[0005] Currently, a warning layer is provided on the outside of the wear-resistant layer of the high pressure fracturing hose. After the wear-resistant layer is worn out during use, the warning layer is exposed, and manual inspection of the wear-resistant layer inside the high pressure fracturing hose is required using an endoscope. Manual inspection is time-consuming and inefficient, and is prone to missed points or misjudgments, increasing downtime and reducing production efficiency.

[0006] Therefore, it is necessary to propose a high pressure flexible fracturing hose to solve the problems existing in the prior art. UTILITY MODEL CONTENT

[0007] A series of simplified concepts are introduced in the utility model content part, which will be further described in detail in the specific embodiment part. The utility model content part of the utility model does not mean trying to limit the key features and necessary technical features of the claimed technical solution, and even less means trying to determine the protection scope of the claimed technical solution.

[0008] To solve the above problems, the utility model provides a kind of high pressure flexible fracturing hose, including abrasion layer, stress dispersion layer, reinforcing layer and outer rubber layer by inside to outside are sequentially arranged, detection line is arranged in abrasion layer along the length direction of fracturing hose, and the both ends of detection line are respectively passed through stress dispersion layer, reinforcing layer and outer rubber layer and are electrically connected with detection unit arranged on the outer circumference of outer rubber layer, detection unit sends first signal in time, when detection line is disconnected, detection unit sends second signal.

[0009] Preferably, the detection line extends helically in the abrasion layer along the length direction of the fracturing hose.

[0010] Preferably, the detection line is located in the abrasion layer near the stress dispersion layer.

[0011] Preferably, the detection line is insulated from the abrasion layer, the stress dispersion layer, the reinforcing layer and the outer rubber layer.

[0012] Preferably, the detection unit includes a detection module and a power supply, and the detection module is electrically connected with the detection line and the power supply.

[0013] Preferably, the detection unit further includes a wireless signal transmitting module, and the wireless signal transmitting module is electrically connected with the detection module.

[0014] Preferably, the reinforcing layer is a multi-layer steel wire layer structure bonded with adhesive, and each layer of steel wire layer is spirally arranged, and the adjacent steel wire layers are opposite in rotation direction.

[0015] Preferably, the abrasion layer is made of natural rubber, synthetic rubber or special plastic.

[0016] Preferably, the abrasion layer is dispersedly distributed with abrasion-resistant microspheres.

[0017] Preferably, the abrasion-resistant microspheres are carbon microspheres or silica microspheres, and the diameter of the carbon microspheres or silica microspheres is 5-30 nm.

[0018] Compared with the prior art, the utility model at least has the following beneficial effects:

[0019] The high pressure flexible fracturing hose embeds the detection line in the abrasion layer near the stress dispersion layer, monitors the on-off of the detection line with the detection unit, judges the abrasion degree of the abrasion layer, has high detection efficiency, will not miss detection and misjudgment, does not need to stop detection, and improves production efficiency.

[0020] The high-pressure flexible fracturing hose has other advantages, objects and features which will be embodied in part by the following description and will be understood by those skilled in the art through research and practice of the high-pressure flexible fracturing hose. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, illustrate the present application and explain the principles of the present application, and do not constitute a limitation of the present application. In the drawings:

[0022] Figure 1 A structure schematic view of the high-pressure flexible fracturing hose disclosed by the present application;

[0023] Figure 2 A structure schematic view of the high-pressure flexible fracturing hose in axial section disclosed by the present application;

[0024] Figure 3 A structure schematic view of the detection line connecting the detection unit disclosed by the present application;

[0025] Figure 4 A structure schematic view of the high-pressure flexible fracturing hose in stepped section disclosed by the present application. DETAILED DESCRIPTION

[0026] The present application will be further described in detail below with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement the present application according to the description.

[0027] It should be understood that the terms such as "have", "contain" and "include" used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0028] As shown in the drawings, Figures 1-4 A high-pressure flexible fracturing hose includes a wear-resistant layer 1, a stress dispersion layer 2, a reinforcing layer 3 and an outer rubber layer 4 arranged in sequence from inside to outside, a detection line 5 is arranged in the length direction of the fracturing hose in the wear-resistant layer 1, both ends of the detection line 5 pass through the stress dispersion layer 2, the reinforcing layer 3 and the outer rubber layer 4 and are electrically connected with a detection unit 6 arranged on the outer circumference of the outer rubber layer 4, the detection unit 6 sends a first signal at regular intervals, and the detection unit 6 sends a second signal when the detection line 5 is disconnected.

[0029] Further, the detection line 5 extends spirally in the length direction of the fracturing hose in the wear-resistant layer 1.

[0030] Further, the detection line 5 is located in the wear-resistant layer 1 close to one side of the stress dispersion layer 2.

[0031] Further, the detection line 5 is insulated from the wear-resistant layer 1, the stress dispersion layer 2, the reinforcing layer 3 and the outer rubber layer 4.

[0032] Further, the detection unit 6 comprises a detection module and a power supply, and the detection module is electrically connected with the detection line 5 and the power supply respectively.

[0033] Further, the detection unit 6 further comprises a wireless signal transmitting module, and the wireless signal transmitting module is electrically connected with the detection module.

[0034] Further, the reinforcing layer 3 is a multi-layer steel wire layer structure using adhesive bonding, each layer of steel wire layer is spirally arranged, and the adjacent steel wire layers have opposite rotation directions.

[0035] Further, the wear-resistant layer 1 is made of natural rubber, synthetic rubber or special plastic.

[0036] Further, the wear-resistant layer 1 is dispersedly distributed with wear-resistant microspheres.

[0037] Further, the wear-resistant microspheres are carbon microspheres or silica microspheres, and the diameter of the carbon microspheres or silica microspheres is 5-30nm.

[0038] Working principle of the above technical solution:

[0039] In the working process of the high-pressure flexible fracturing hose, the sand-carrying liquid in the fracturing fluid can increase the effect of carrying ceramsite or quartz sand into the fracture and placing the sand at the predetermined position. In the total amount of the fracturing fluid, this part accounts for a large proportion, and the sand-carrying liquid has the same effect of forming a fracture and cooling the stratum as other fracturing fluids. The ceramsite or quartz contained in the fracturing fluid can increase the wear of the fracturing hose under the action of high pressure, so it is necessary to regularly check the wear condition of the wear-resistant layer in the fracturing hose, replace the fracturing hose in time, and prevent production accidents.

[0040] The high-pressure flexible fracturing hose comprises, from inside to outside, a wear-resistant layer 1, a stress dispersion layer 2, a reinforcing layer 3 and an outer rubber layer 4, a detection line 5 is arranged in the wear-resistant layer 1 along the length direction of the fracturing hose, both ends of the detection line 5 pass through the stress dispersion layer 1, the reinforcing layer 3 and the outer rubber layer 4 and are electrically connected with a detection unit 6 arranged on the outer circumference of the outer rubber layer 4, the detection line 5 is arranged on one side of the wear-resistant layer 1 close to the stress dispersion layer 2, for example, the thickness of the wear-resistant layer 1 is 10 mm, the detection line 5 is spirally arranged at a position 8-9 mm away from the outer wall of the wear-resistant layer 1, during use of the high-pressure flexible fracturing hose, the detection unit 6 sends a first signal at a regular time interval under the condition that the detection line 5 keeps open, the first signal indicates that the use condition of the wear-resistant layer 1 is normal, the time interval of sending the first signal can be determined according to needs, for example, once per hour, once per day or once every two days, the longer the time interval of sending the first signal, the longer the power supply time, but if the time interval is too long, it may cause the wear-resistant layer to be worn out during the interval, the interval can be set according to the specific use scene. The wear-resistant layer 1 is continuously worn, when the wear reaches the position of the detection line 5, the detection line 5 will also be worn, when the detection line 5 is broken, the detection module of the detection unit 6 detects the open circuit, at this time, the thickness of the wear-resistant layer 1 is also very small, the detection module of the detection unit 6 controls the wireless signal emission module to send a second signal, the second signal indicates that the wear-resistant layer 1 of the high-pressure flexible fracturing hose has reached the wear limit and the high-pressure flexible fracturing hose needs to be replaced, the first signal and the second signal are both wireless signals, the wireless signal can be sent to the terminal through the narrow Internet of Things, the terminal can be the mobile phone of the staff, after receiving the open circuit signal, the staff replaces the high-pressure flexible fracturing hose. The outer diameter of the detection line spirally arranged in the wear-resistant layer 1 and the size of the wear-resistant layer 1 can be set according to the actual working condition to ensure the production safety and prevent waste caused by too much remaining wear-resistant layer. The spiral detection line 5 is coaxially arranged with the wear-resistant layer 1.

[0041] The detection module is an open circuit detection module, the circuit open circuit detection module is prior art, for example, the electronic device and its open circuit detection system and open circuit detection method disclosed in CN102798787B, which will not be described here.

[0042] The detection line uses a conductive metal wire, for example, a copper wire, the detection line 5 is insulated from the wear-resistant layer 1, the stress dispersion layer 2, the reinforcing layer 3 and the outer rubber layer 4 to increase the accuracy of detection and prevent misjudgment. According to different working environments and properties of the high-pressure flexible fracturing hose, different pitches of the spiral of the detection line 5 can be set. The minimum distance of the pitch can be selected as 5 mm.

[0043] The detection line 5 can be spirally arranged as shown in Figure 2 or can be linearly or serpentine arranged along the length direction of the high-pressure flexible fracturing hose.

[0044] The reinforcing layer 3 is a multi-layer steel wire layer structure bonded with adhesive, each layer of steel wire layer is spirally arranged with multiple steel wires, the adjacent steel wire layers are opposite in rotation direction, and the position where the detection line passes through the reinforcing layer 3 is well insulated.

[0045] The spiral angle of the steel wire of each layer of steel wire layer of the reinforcing layer 3 can be set as a balance angle, that is, 55°44', as shown in the reinforcing layer 3. Figure 4 The reinforcing layer 3 sets four layers of steel wire layers, and the reinforcing layer 3 can also set more layers, generally sets an even number of layers, and the spiral angles of the adjacent steel wire layers can be the same or can be set to decrease from outside to inside, for example, the spiral angles of the steel wire layers from outside to inside are 75°, 65°, 55°, 45°, 35° and 25°.

[0046] The high-pressure flexible fracturing hose can also be used for mortar conveying in the track traffic shield industry. In the track traffic shield operation, a large amount of silt will be generated, and the high-pressure flexible fracturing hose can also be used to convey the silt generated in the track traffic shield. When hard rock is encountered in the track traffic shield operation, fracturing operation can also be performed on the rock, reducing the working intensity of the shield machine and improving the efficiency of the track traffic shield operation.

[0047] The wear-resistant layer 1 is made of natural rubber, synthetic rubber or special plastic. The synthetic rubber can be hydrogenated nitrile rubber, and the special plastic can be UHMEPE (ultra-high molecular weight polyethylene).

[0048] In order to increase the wear resistance of the wear-resistant layer, wear-resistant microspheres such as carbon microspheres or silica microspheres can be added to the wear-resistant layer to increase the wear resistance.

[0049] The following will take the addition of carbon microspheres or silica microspheres in natural rubber as an example. The addition of wear-resistant microspheres such as carbon microspheres or silica microspheres in natural rubber makes the carbon microspheres or silica microspheres disperse in the natural rubber.

[0050] The combination of carbon microspheres and rubber is mainly realized through physical and chemical interactions. Specifically, it includes mixing, vulcanization, and interaction between microspheres and rubber molecules:

[0051] Mixing process, raw material preparation: first, the rubber matrix (such as natural rubber) and carbon microspheres as fillers need to be prepared. In addition, other additives such as vulcanizing agents, accelerators, and antioxidants may also be needed to improve the processing performance of the rubber and the performance of the final product; mixing: put the rubber matrix, carbon microspheres and other additives together into a mixer for mixing. During the mixing process, through the action of mechanical force, the carbon microspheres are uniformly dispersed in the rubber matrix to form a preliminary composite material.

[0052] Vulcanization process: Vulcanization is an important step in rubber processing, through which cross-linking structures are formed between rubber molecules, thereby improving the strength and wear resistance of rubber.

[0053] Vulcanization conditions: Put the uniformly mixed raw material into a flat vulcanization machine for vulcanization. During the vulcanization process, the vulcanization temperature, pressure and time need to be controlled to ensure that the rubber can be fully vulcanized and reach the required performance.

[0054] During the vulcanization process, the cross-linking reaction between rubber molecules further promotes the combination of carbon microspheres and the rubber matrix. Cross-linking reaction forms strong chemical bonds between rubber molecular chains, while carbon microspheres are firmly fixed in the rubber matrix through physical and chemical action.

[0055] Physical action: The physical action between carbon microspheres and the rubber matrix mainly includes van der Waals force, hydrogen bond, etc. These physical actions enable carbon microspheres to stably disperse in the rubber matrix and form a tight combination.

[0056] Chemical action: In some cases, the surface of carbon microspheres may contain some functional groups (such as hydroxyl, carboxyl, etc.) that can react with rubber molecules. These functional groups can react with rubber molecules to form chemical bonds, thereby further enhancing the bonding force between carbon microspheres and the rubber matrix.

[0057] There are mainly two methods for incorporating silica into rubber: dry method and wet method.

[0058] Dry method: Mix silica and rubber directly, and form by processes such as stirring, grinding, high-speed stirring, mixing, compression, etc. This method is simple and easy to operate, but requires small particle size and uniform distribution of silica to ensure good dispersion in rubber.

[0059] Wet method: Dissolve rubber and silica in organic solvents respectively, then mix and stir the solutions, and then prepare and form by processes such as evaporation of solvent or military separation. Wet method can better control the dispersion state of silica in rubber, but the process is relatively complex.

[0060] In order to further improve the bonding force between silica and rubber, chemical modification method can be used. For example, modify silica by polymer grafting method or alcohol ester method to make its surface have functional groups compatible with rubber molecules. These functional groups can react chemically or physically adsorb with rubber molecules, thereby enhancing the bonding force between silica and rubber.

[0061] The beneficial effects of the above technical solutions are:

[0062] The high-pressure flexible fracturing hose, detection lines are embedded on the side close to the stress dispersion layer in the wear-resistant layer, the on-off of the detection lines is monitored by the detection unit, the wear degree of the wear-resistant layer is judged, the detection efficiency is high, missing detection and misjudgment do not occur, on-machine detection is not needed, and the production efficiency is improved.

[0063] In the description of the utility model, need understanding is, term '' center '', '' longitudinal '', '' horizontal '', '' length '', '' width '', '' thickness '', '' upper '', '' lower '', '' front '', '' back '', '' left '', '' right '', '' vertical '', '' horizontal '', '' top '', '' bottom '' '' inner '', '' outer '', '' clockwise '', '' counterclockwise '', '' axial '', '' radial '', '' circumferential '' etc. Indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawing, is only for the convenience of describing the utility model and simplifying the description, and is not indicated or implied the device or element indicated must have a particular orientation, with a particular orientation configuration and operation, therefore can not be understood as the restriction of the utility model.

[0064] In the utility model, unless another explicit provision and limitation, the terms '' installation '', '' connection '', '' fixed '' etc. Terms should be broad understanding, for example, can be fixed connection, also can be detachable connection, or integrated;Can be mechanical connection, also can be electric connection or each other can communicate;Can be directly connected, also can be indirectly connected through intermediate medium, can be two element internal communication or two element interaction, unless another explicit limitation. For ordinary skilled in the art, the above-mentioned terms in the utility model can be understood according to the specific meaning of the specific situation.

[0065] Although the embodiments of the utility model have been disclosed as above, it is not limited to the application listed in the specification and embodiments only, it can be fully applied to various fields suitable for the utility model, and other modifications can be easily realized by those skilled in the art, therefore the utility model is not limited to specific details and the figures shown and described herein without departing from the general concept defined by the claims and equivalent scope.

Claims

1. A high pressure flexible fracturing hose, characterized in that, The wear-resistant layer (1), the stress dispersion layer (2), the reinforcing layer (3) and the outer rubber layer (4) are sequentially arranged from inside to outside, the detection line (5) is arranged along the length direction of the fracturing hose in the wear-resistant layer (1), the two ends of the detection line (5) are respectively connected with the detection unit (6) arranged on the outer circumference of the outer rubber layer (4) through the stress dispersion layer (2), the reinforcing layer (3) and the outer rubber layer (4), the detection unit (6) sends the first signal at regular intervals, and the detection unit (6) sends the second signal when the detection line (5) is disconnected.

2. The high pressure flexible fracturing hose of claim 1, wherein, The detection line (5) spirally extends along the length direction of the fracturing hose in the wear-resistant layer (1).

3. The high pressure flexible fracturing hose of claim 2, wherein, The detection line (5) is located on the side close to the stress dispersion layer (2) in the wear-resistant layer (1).

4. The high pressure flexible fracturing hose of claim 3, wherein, The detection line (5) is insulated from the wear-resistant layer (1), the stress dispersion layer (2), the reinforcing layer (3) and the outer rubber layer (4).

5. The high pressure flexible fracturing hose of claim 1, wherein, The detection unit (6) comprises a detection module and a power supply, and the detection module is electrically connected with the detection line (5) and the power supply.

6. The high pressure flexible fracturing hose of claim 5, wherein, The detection unit (6) further comprises a wireless signal transmitting module, and the wireless signal transmitting module is electrically connected with the detection module.

7. The high pressure flexible fracturing hose of claim 1, wherein, The reinforcing layer (3) is a multi-layer steel wire layer structure bonded by using an adhesive, each layer of steel wire layer is spirally arranged, and the rotation directions of adjacent steel wire layers are opposite.

8. The high pressure flexible fracturing hose of claim 1, wherein, The wear-resistant layer (1) is made of natural rubber, synthetic rubber or special plastic.

9. The high pressure flexible fracturing hose of claim 8, wherein, The wear-resistant microspheres are dispersedly distributed in the wear-resistant layer (1).

10. The high pressure flexible fracturing hose of claim 9, wherein, The wear-resistant microspheres are carbon microspheres or silica microspheres, and the diameters of the carbon microspheres or the silica microspheres are 5-30 nm.

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