WO2021237601A1 - Fracturing and conveying ground manifold system - Google Patents

Abstract

A fracturing and conveying ground manifold system, comprising a fracturing tree (6), a high-low pressure manifold device (1), a high-pressure flange conveying pipeline (3), a ground fracturing control manifold device (2), an offset flange mechanism (4) and a corner pipeline (5). The high-low pressure manifold device is linearly connected to the ground fracturing control manifold device by means of the high-pressure flange conveying pipeline, the ground fracturing control manifold device is connected to the fracturing tree by means of the offset flange mechanism and the corner pipeline, and the offset flange mechanism and the corner pipeline can achieve the adjustment of different heights and orientations of the ground fracturing control manifold device and the fracturing tree. The manifold system has a large discharge capacity, has a simple structural layout, has few pipeline joints, and can effectively prolong the service life of manifolds, achieve a multi-wellhead zipper-type operation, and improve the operation efficiency of a fracturing well factory.

Description

Fracturing transportation surface manifold system Technical field

The invention relates to the technical field of fracturing transportation, in particular to a fracturing transportation surface manifold system.

Background technique

In conventional fracturing sites, the fluid transport channels from the fracturing truck to the fracturing wellhead are connected by union high-pressure pipelines, that is, the assembly of high-pressure pipelines is realized through the rotatable and sealed connection of unions. The existing unions The pipe diameter has specifications of 2", 3" and 4". The largest existing specification is 4". Therefore, due to the above-mentioned structure and process limitations, the current high-pressure pipeline has a smaller diameter, which is allowed by a single high-pressure pipeline. The maximum displacement of fracturing is relatively low, which is difficult to meet the current delivery requirements of large displacement for fracturing.

In order to meet the "large displacement" construction requirements on site, the existing solution is to use a large number of high-pressure union pipelines between the fracturing truck and the fracturing tree. The increase in displacement per unit time. A large number of high-pressure union pipelines need to realize large-displacement transportation, and a lot of joints are needed to realize the series-parallel connection, and the direction is changed through the movable elbow, so that the fracturing truck at the fracturing operation site and the fracturing tree It will be a multi-pipeline, multi-joint, multi-elbow conveying system, and this kind of conveying system has many problems such as many leakage points, complicated layout, inconvenient installation, and short service life of the elbow.

Therefore, there is an urgent need for a fracturing transportation surface manifold system with simple layout, convenient installation, few joints and long service life.

Summary of the invention

The purpose of the present invention overcomes the deficiencies of the prior art and provides a fracturing transportation surface manifold system, which consists of a high and low pressure manifold device, a high pressure flange conveying pipeline, a surface fracturing control manifold device, an offset flange mechanism and a corner Pipelines, etc. form high-pressure fluid channels, which provide a brand-new solution for fracturing well factory operations in oil and gas field-related construction operations. This application aims to simplify the wellsite layout of fracturing operations and make the fracturing process more efficient, safer and more environmentally friendly. The linear ground manifold can effectively reduce the number of high-pressure pipelines, reduce kinetic energy loss, reduce vibration, and reduce the erosion impact of solid-liquid mixed media on fluid channel equipment and protect the environment. By assembling the ground manifold on the ground fracturing control skid, and using flanged straight pipeline connections between the various systems, the on-site disassembly and assembly are more efficient and the safety of the operation process is more guaranteed. Through the opening and closing of the surface fracturing control skid, continuous fracturing, pumping, and ball throwing between multiple wellheads can be realized, and the zipper operation of multiple wellheads can be realized, and the operating efficiency of the fracturing well factory can be improved.

The purpose of the present invention is achieved through the following technical measures: a fracturing transportation surface manifold system, including a fracturing tree, a high and low pressure manifold device, a high pressure flange transportation pipeline, a surface fracturing control manifold device, and an offset method Flange mechanism and corner pipeline, the high and low pressure manifold device is linearly connected to the ground fracturing control manifold device through the high-pressure flange conveying pipeline, and the ground fracturing control manifold device realizes the pressure resistance through the offset flange mechanism and the corner pipeline. The connection of the fracturing tree, the offset flange mechanism and the corner pipeline can realize the adjustment of different heights and directions between the surface fracturing control manifold and the fracturing tree.

Further, the high-pressure flange conveying pipeline realizes the linear connection between the high-low pressure manifold device and the ground fracturing control manifold device through the first lifting mechanism.

Further, there are more than one first lifting mechanism.

Further, the high-pressure flange delivery pipeline is composed of a 6BX flange straight pipe connection.

Further, the high and low pressure manifold device adopts a 6BX flange straight pipe as a high-pressure fluid delivery pipeline.

Further, according to the number of fracturing trucks at the fracturing operation site, the high and low pressure manifold devices with different numbers of interfaces are configured.

Further, the number of the ground fracturing control manifold device and the fracturing tree are the same.

Further, the surface fracturing control manifold device includes a fracturing valve, a first four-way and a second lifting mechanism, the fracturing valve and the first four-way are connected to form a fluid pipeline, and the second lifting mechanism is used for Elevate the level of the fluid pipeline. In the transportation state of the fracturing transportation surface manifold system, the fluid pipeline and the high-pressure flange transportation pipeline maintain linear transportation.

Further, a first four-way connection is provided at the inlet end and the outlet end of the fluid pipeline respectively, and the fracturing valve is used for on-off control of the fluid pipeline.

Further, the 6BX flange straight pipe connection is adopted between the surface fracturing control manifold devices.

Further, the 6BX flange straight pipes between the surface fracturing control manifolds can be connected to the pumping channels for fracturing operations.

Further, the fracturing valve and the first four-way are integrated on the skid body, and the second lifting mechanism is used for lifting and lowering the entire skid body.

Further, six ports are provided on the fracturing tree, the outlet end of the ground fracturing control manifold is connected to the offset flange mechanism and the corner pipeline in sequence, and the outlet of the corner pipeline is connected to the fracturing tree through the six links.

Further, the offset flange mechanism includes a first rotating flange pipe, a first three-way pipe, a first straight pipe, a second three-way pipe, and a second rotating flange pipe. The first rotating flange pipe passes through the first three-way pipe. The first straight pipe is connected to one end of the first straight pipe, and the other end of the first straight pipe is connected to the second rotating flange pipe through the second tee. The offset flange mechanism can be along the first rotating flange pipe and the second rotating flange pipe. The axis of the rotating flange tube rotates.

Further, the entire offset flange mechanism realizes the lifting of the horizontal height through the third lifting mechanism.

Further, the corner pipeline includes a third rotating flange pipe, a fourth tee, a fourth rotating flange pipe, and a fifth tee. One end of the fourth rotating flange pipe passes through the fourth tee and the third tee. The rotating flange pipe is connected, and the other end of the fourth rotating flange pipe is connected with the fifth tee.

Further, the entire angle pipeline is raised and lowered by a fourth lifting mechanism.

Compared with the prior art, the present invention has the following beneficial effects: a fracturing transportation surface manifold system, consisting of a high and low pressure manifold device, a high-pressure flange conveying pipeline, a surface fracturing control manifold device, and an offset flange mechanism It forms a high-pressure fluid channel with corner pipelines, etc., and provides a brand-new solution for fracturing well factory operations in oil and gas field related construction operations. This application aims to simplify the wellsite layout of fracturing operations and make the fracturing process more efficient, safer and more environmentally friendly. The linear ground manifold can effectively reduce the number of high-pressure pipelines, reduce kinetic energy loss, reduce vibration, and reduce the erosion impact of solid-liquid mixed media on fluid channel equipment and protect the environment. By assembling the ground manifold on the ground fracturing control skid, and using flanged straight pipeline connections between the various systems, the on-site disassembly and assembly are more efficient and the safety of the operation process is more guaranteed. Through the opening and closing of the surface fracturing control skid, continuous fracturing, pumping, and ball throwing between multiple wellheads can be realized, and the zipper operation of multiple wellheads can be realized, and the operating efficiency of the fracturing well factory can be improved.

The present invention will be described in detail below with reference to the drawings and specific embodiments.

Description of the drawings

Figure 1 is a schematic diagram of the side structure of the fracturing transportation surface manifold system.

Figure 2 is a schematic diagram of the top view structure of the fracturing transportation surface manifold system.

Figure 3 is a schematic diagram of the structure of the present high and low pressure manifold device.

Figure 4 is a schematic diagram of the structure of the surface fracturing control manifold.

Figure 5 is a schematic structural diagram of the connection between the offset flange mechanism and the corner pipeline.

Among them, 1. High and low pressure manifold device, 3. High pressure flange conveying pipeline, 2. Ground fracturing control manifold device, 4. Offset flange mechanism, 5. Corner pipeline, 6. Fracturing tree, 7. Cock Valve, 8. High-pressure straight pipe, 9. Butterfly valve, 10. Low-pressure pipeline, 11. First lifting mechanism, 12. Fracturing valve, 13. First four-way, 14. Second lifting mechanism, 15. First rotation method Blue tube, 16. The first tee, 17. The first straight tube, 18. The second tee, 19. The second rotating flange tube, 20. The third lifting mechanism, 21. The third rotating flange tube, 22 .The fourth tee, 23. The fourth rotating flange pipe, 24. The fifth tee, 25. The fourth lifting mechanism, 26. Six-way.

Detailed ways

As shown in Figures 1 to 5, a fracturing transportation surface manifold system includes a fracturing tree 6, a high and low pressure manifold device 1, a high pressure flange transportation pipeline 3, a surface fracturing control manifold device 2, and an offset method The flange mechanism 4 and the corner pipeline 5, the high and low pressure manifold device 1 is linearly connected to the ground fracturing control manifold device 2 through the high-pressure flange conveying pipeline 3, and the ground fracturing control manifold device 2 is through the offset flange mechanism 4 and the corner pipeline 5 realize the connection with the fracturing tree 6, and the offset flange mechanism 4 and the corner pipeline 5 can realize the adjustment of different heights and directions between the ground fracturing control manifold 2 and the fracturing tree 6. The high and low pressure manifold device 1, the high pressure flange conveying pipeline 3, the surface fracturing control manifold device 2, the offset flange mechanism 4 and the corner pipeline 5 form a high pressure fluid channel. In the related construction operations of oil and gas fields, it is fracturing. Well operation provides a new large displacement, relatively straight line, fewer pipelines, and fewer joints of the conveying manifold system. From the original large displacement realized by multiple high-pressure union pipelines in series and parallel, it is replaced by 11 high-pressure linear transmissions of high and low pressure manifolds----1 high-pressure flange transmission pipelines and 3 linear transmissions-----ground pressure The fracturing control manifold device 2 is conveyed in a straight line (the fluid pipeline is adjusted to the same height as the high-pressure flange conveying pipeline 3 through the first lifting mechanism 11) and divided by the straight flange pipe between the adjacent ground fracturing control manifold device 2 Furthermore, it matches the number of fracturing trees 6-----the offset flange mechanism 4 is connected with the corner pipeline 5 and the height and angle are adjusted, so as to realize the connection with the fracturing tree 6. It greatly simplifies the layout of a large number of high-pressure union pipelines in fracturing operation wellsites.

The high-pressure flange conveying pipeline 3 realizes the linear connection between the high-low pressure manifold device 1 and the ground fracturing control manifold device 2 through the first lifting mechanism 11. The high-pressure flange conveying pipeline 3 is raised to the same height as the high-pressure conveying pipeline of the high-low pressure manifold device 1 by the first lifting mechanism 11.

There is more than one first lifting mechanism 11. According to the actual length of the high-pressure flange conveying pipeline 3, an appropriate number of the first lifting mechanism 11 is set. The first lifting mechanism 11 can also provide support for the high-pressure flange conveying pipeline 3 while lifting the high-pressure flange conveying pipeline 3. The provision of a single first lifting mechanism 11 can also better adapt to the actual ground conditions of the fracturing operation site . The overall lifting method of the single first lifting mechanism 11 with respect to the high-pressure flange conveying pipeline 3 makes it easier to level the ground at the fracturing site, without the need to perform overall leveling treatment on the ground. The lifting of the high-pressure flange conveying pipeline 3 from the ground by the first lifting mechanism 11 can also effectively avoid the abrasion of the manifold on the ground in the prior art and prolong the service life of the manifold.

The high-pressure flange conveying pipeline 3 is composed of a 6BX flange straight pipe connection. Compared with the existing union type high-pressure pipeline, the diameter of the 6BX flange straight pipe is larger, and the displacement of a single high-pressure pipeline is larger.

The high and low pressure manifold device 1 adopts the 6BX flange straight pipe as the conveying pipeline of the high pressure fluid. The high and low pressure manifold device 1 adopts a skid-mounted form, including a plug valve 7, a union pipeline, a movable elbow, a high-pressure straight pipe 8, a butterfly valve 9 and a low-pressure pipeline 10, etc. The plug valve 7 adopts a flange type or a union type. The end interface. The fracturing fluid is sucked into the plunger pump of the fracturing truck through the low pressure manifold. After the plunger pump is pressurized, the high pressure fluid enters the high and low pressure manifold device 1 through the union pipeline, the movable elbow, the plug valve 7, etc. The high-pressure part ---- high-pressure straight pipe 8. The high-pressure straight pipe 8 is a 6BX flange straight pipe.

According to the number of fracturing trucks at the fracturing operation site, the high and low pressure manifold devices 1 with different numbers of interfaces are configured. After all the high-pressure fluids output by the fracturing trucks are converged by the high-low pressure manifold device 1, a linear fluid transport mode is formed in the flange straight pipe. Compared with the multi-branch high-pressure fluid conveying method in the prior art, this conveying method has a simpler structure and higher conveying efficiency. The straight flange pipe of the high and low pressure manifold device 1 plus the high pressure flange delivery pipeline 3 plus the fluid pipeline in the surface fracturing control manifold device 2 form a straight line for high pressure fluid delivery.

The number of the surface fracturing control manifold device 2 and the fracturing tree 6 are the same. In the actual fracturing operation site, there are several wells, there are several fracturing trees 6, and there are several fracturing trees 6 that have a corresponding number of surface fracturing control manifolds 2. Figure 2 shows the structure of 3 wells as an example. The surface fracturing control manifold device 2 includes a fracturing valve 12, a first four-way 13 and a second lifting mechanism 14. The fracturing valve 12 and the first four-way 13 are connected to form a fluid pipeline, and the second lifting The mechanism 14 is used for raising and lowering the level of the fluid pipeline. In the transportation state of the fracturing transportation surface manifold system, the fluid pipeline and the high-pressure flange transportation pipeline 3 maintain linear transportation. The fracturing valve 12 has a flat valve structure, which can be driven by dual hydraulics, two-handed wheels, or one hydraulic drive and one hand-wheel drive.

A first four-way 13 is provided at the inlet end and the outlet end of the fluid pipeline respectively, and the fracturing valve 12 is used for on-off control of the fluid pipeline. Through the opening and closing control of the fracturing valves 12 on the different ground fracturing control manifolds 2, the zipper operation of the fracturing operation is realized.

The ground fracturing control manifolds 2 are connected by 6BX flange straight pipes of different lengths.

The 6BX flange straight pipes between the surface fracturing control manifolds 2 can be connected to pumping channels for fracturing operations. The other end of the pumping channel is connected with the pumping device to realize the operation process of pump injection and ball throwing.

The fracturing valve 12 and the first four-way 13 are integrated on the skid body, and the second lifting mechanism 14 is used for lifting the entire skid body.

The fracturing tree 6 is provided with a six-way 26. The fracturing tree 6 includes a manual valve and a hydraulic valve. The outlet end of the surface fracturing control manifold 2 is connected to the offset flange mechanism 4 and the corner pipeline 5 in sequence. , The outlet of the corner pipeline 5 is connected with the fracturing tree 6 through the six-way 26. The six-way 26 is used as an inlet for injection of high-pressure fluid into the fracturing tree 6.

The offset flange mechanism 4 includes a first rotating flange pipe 15, a first three-way pipe 16, a first straight pipe 17, a second three-way pipe 18 and a second rotating flange pipe 19, and a first rotating flange pipe 15 The first three-way 16 is connected to one end of the first straight pipe 17, and the other end of the first straight pipe 17 is connected to the second rotating flange pipe 19 through the second three-way 18, and the offset flange mechanism 4 can be The first rotating flange pipe 15 and the second rotating flange pipe 19 rotate axially. The offset flange mechanism 4 can be formed into multiple types through the rotation of its components to meet the connection between the ground manifolds of different height sizes and directions at the fracturing site.

The offset flange mechanism 4 as a whole realizes the lifting of the horizontal height through the third lifting mechanism 20.

The corner pipeline 5 includes a third rotating flange pipe 21, a fourth tee 22, a fourth rotating flange pipe 23, and a fifth tee 24. One end of the fourth rotating flange pipe 23 passes through the fourth tee 22 is connected to the third rotating flange pipe 21, and the other end of the fourth rotating flange pipe 23 is connected to the fifth tee 24.

The angle pipeline 5 as a whole is raised and lowered by the fourth lifting mechanism 25.

The first lifting mechanism 11, the second lifting mechanism 14, the third lifting mechanism 20, and the fourth lifting mechanism 25 adopt mechanical lifting or hydraulic lifting.

Working principle: After the fracturing fluid is transported from the low pressure pipeline 10 of the high and low pressure manifold 1 to the fracturing truck by the pumping device at the fracturing operation site, the low pressure fracturing fluid is converted into the low pressure fracturing fluid through the plunger pump on the fracturing truck. After the high-pressure fluid is output, it is driven into the high-pressure straight pipe 8 of the high-low pressure manifold device 1, and then passes through the high-pressure flange conveying pipeline 3 to reach the surface fracturing control manifold device 2, and multiple surface fracturing control manifold devices 2 are connected separately Different fracturing tree 6 wellheads are connected to the fracturing tree 6 wellheads through straight flange delivery pipelines, and the opening and closing control of the fracturing valve 12 on the surface fracturing control manifold 2 through different channels is used to realize fracturing The zipper operation of the job.

Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have Various changes and improvements, these changes and improvements all fall within the scope of the claimed invention. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims (17)

A fracturing transportation surface manifold system, which is characterized in that it includes a fracturing tree, a high and low pressure manifold device, a high-pressure flange transportation pipeline, a surface fracturing control manifold device, an offset flange mechanism and a corner pipeline. The high and low pressure manifold device is linearly connected to the surface fracturing control manifold device through the high-pressure flange conveying pipeline, and the surface fracturing control manifold device realizes the connection with the fracturing tree through the offset flange mechanism and the corner pipeline. The offset method The flange mechanism and the corner pipeline can realize the adjustment of different heights and directions between the surface fracturing control manifold and the fracturing tree. The fracturing transportation surface manifold system according to claim 1, wherein the high-pressure flange transportation pipeline realizes a linear connection between the high and low pressure manifold device and the surface fracturing control manifold device through the first lifting mechanism. The fracturing transportation surface manifold system according to claim 2, wherein there are more than one first lifting mechanism. The fracturing transportation surface manifold system according to claim 2, wherein the high-pressure flanged transportation pipeline is composed of 6BX flange straight pipe connection. The fracturing and transportation surface manifold system according to claim 1, wherein the high and low pressure manifold device adopts a 6BX flange straight pipe as a high-pressure fluid delivery pipeline. The fracturing transportation surface manifold system of claim 5, wherein the high and low pressure manifold devices with different numbers of interfaces are configured according to the number of fracturing trucks at the fracturing operation site. The fracturing transportation surface manifold system of claim 1, wherein the number of the surface fracturing control manifold device and the fracturing tree are the same. The fracturing transportation surface manifold system according to claim 7, wherein the surface fracturing control manifold device includes a fracturing valve, a first four-way and a second lifting mechanism, the fracturing valve and the first A four-way connection forms a fluid pipeline. The second lifting mechanism is used to raise and lower the level of the fluid pipeline. In the transportation state of the fracturing transportation surface manifold system, the fluid pipeline and the high-pressure flange transportation pipeline maintain linear transportation. The fracturing transportation surface manifold system according to claim 8, wherein a first four-way connection is provided at the inlet end and the outlet end of the fluid pipeline respectively, and the fracturing valve is used for on-off control of the fluid pipeline. The fracturing transportation surface manifold system according to claim 8, characterized in that: 6BX flange straight pipe connections are adopted between the surface fracturing control manifold devices. The fracturing and transporting surface manifold system according to claim 10, wherein the 6BX flange straight pipe between the surface fracturing control manifold devices can be connected to the pumping channel for fracturing operations. The fracturing transportation surface manifold system according to claim 8, wherein the fracturing valve and the first four-way are integrated on the skid body, and the second lifting mechanism is used for lifting and lowering the entire skid body. The fracturing transportation surface manifold system of claim 1, wherein the fracturing tree is provided with six ports, and the outlet end of the surface fracturing control manifold device is connected to the offset flange mechanism and the corner in sequence The outlet of the pipeline and the corner pipeline is connected with the fracturing tree through a six-way connection. The fracturing transportation surface manifold system according to claim 1, wherein the offset flange mechanism includes a first rotating flange pipe, a first tee, a first straight pipe, a second tee, and a first straight pipe. Two rotating flange pipes, the first rotating flange pipe is connected to one end of the first straight pipe through the first tee, and the other end of the first straight pipe is connected to the second rotating flange pipe through the second tee. The flange moving mechanism can rotate along the axis of the first rotating flange pipe and the second rotating flange pipe. The fracturing and transportation surface manifold system according to claim 14, wherein the offset flange mechanism as a whole realizes the lifting of the horizontal height through a third lifting mechanism. The fracturing transportation surface manifold system according to claim 1, wherein the corner pipeline includes a third rotating flange pipe, a fourth tee, a fourth rotating flange pipe and a fifth tee. One end of the fourth rotating flange pipe is connected with the third rotating flange pipe through the fourth tee, and the other end of the fourth rotating flange pipe is connected with the fifth tee. The fracturing and transportation surface manifold system according to claim 16, characterized in that the whole angle pipeline is raised and lowered by a fourth lifting mechanism.

Images