CN113818855A

CN113818855A - Fracturing conveying system and switching structure

Info

Publication number: CN113818855A
Application number: CN202111202344.7A
Authority: CN
Inventors: 鞠国领; 包德健; 王继鑫; 张树林
Original assignee: Yantai Jereh Petroleum Equipment and Technologies Co Ltd
Current assignee: Yantai Jereh Petroleum Equipment and Technologies Co Ltd
Priority date: 2021-10-15
Filing date: 2021-10-15
Publication date: 2021-12-21

Abstract

The invention discloses a fracturing conveying system and a switching structure, which are used for solving the problems that a conveying pipeline in the existing fracturing conveying system is directly connected with a corresponding interface of a fracturing conveying device through the end part of the pipeline, and the pipe body is damaged or the connecting position is easy to erode and wear due to forced connection. The fracturing delivery system includes: a plurality of fracture conveyance devices; the connecting pipe assembly is communicated with the two fracturing conveying devices; the connecting pipe assembly comprises at least one section of connecting pipe and at least one switching structure, and the at least one switching structure is positioned between the connecting pipe and the fracturing conveying device and/or between two adjacent sections of connecting pipes. The fracturing conveying system provided by the invention can eliminate the difference between the length of the connecting pipe and the distance between the two fracturing conveying devices; the installation angle between the connecting pipe and the interface of the fracturing conveying device can be adjusted, and smooth transition of connection between the connecting pipe and the fracturing conveying device is realized.

Description

Fracturing conveying system and switching structure

Technical Field

The invention relates to the field of oil and gas exploitation equipment, in particular to a fracturing conveying system and a switching structure.

Background

In the oil and gas field fracturing operation field, a wellhead Christmas tree, a flow dividing pry, a fracturing truck, a high-low pressure manifold pry and a low-low pressure manifold pry are communicated through a connecting pipeline to form a fracturing fluid conveying system, and fracturing fluid is conveyed into an oil and gas well from the fracturing truck.

At present, the connecting pipelines adopted are usually metal pipelines, and the connecting pipelines are connected through a union connection or a flange connection and the like. Because the size parameters (the distance between a Christmas tree and a flow splitting pry, between a fracturing truck and a high-low pressure manifold pry, between the prys and the angle of an interface) of each well site are inconsistent, a large number of metal pipelines with different lengths are required to be used for direction changing for positions needing length and angle changing, the layout is complex, field operators need to continuously test and adjust proper length and angle for installation and connection, the field installation difficulty is high, the number of connectors in the system is large, the number of turning directions is large, and when fracturing fluid is conveyed, the metal pipelines can be greatly eroded and shaken, the service life of products is shortened, the unsafe risk on the field is increased, and simultaneously, the resource waste and the cost are increased.

In the related art, as shown in fig. 1 and 2, a flexible pipeline is used instead of a metal pipeline, the end of the flexible pipeline is directly connected with corresponding interfaces of a wellhead fracturing tree, a skid and a fracturing truck, and tightening operation is performed, so that the layout of a working site is simplified. However, because the metal wire is wound on the flexible pipe body, the extension length and the bending flexibility of the flexible pipe are limited to a certain extent, so that when the distance and the angle between two fracturing conveying devices which need to be connected are in a problem, the flexible pipe and the fracturing conveying devices need to be forcibly connected in the connection mode, the difficulty in installation and disassembly is caused, certain damage can be caused to the flexible pipe body, and the service life of the flexible pipe is shortened. Meanwhile, the connection mode has certain requirements on the arrangement and the arrangement direction of field equipment for fracturing operation, and causes difficulty and limitation on the arrangement of the equipment on the fracturing operation field. In addition, in the process of conveying high-pressure fracturing fluid, the positions where the fracturing fluid is forcibly installed can cause disorder in the fluid flowing process, so that the erosion to the pipe body or the connecting position is caused, and the service life of the flexible pipe and other fracturing conveying devices is shortened.

Disclosure of Invention

The invention aims to provide a fracturing conveying system and a switching structure, which are used for solving the problems that a conveying pipeline in the existing fracturing conveying system is directly connected with a corresponding interface of a fracturing conveying device through the end part of the pipeline, and the pipe body is damaged or the connecting position is easy to erode and wear due to forced connection.

In order to achieve the purpose, the invention provides the following technical scheme:

in a first aspect, some embodiments of the invention provide a fracture delivery system comprising: a plurality of fracture conveyance devices; the connecting pipe assembly is communicated with the two fracturing conveying devices; the connecting pipe assembly comprises at least one section of connecting pipe and at least one adapter structure, and the at least one adapter structure is positioned between the connecting pipe and the fracturing conveying device and/or between two adjacent sections of connecting pipe.

In some embodiments, the at least one transition structure comprises a first transition structure comprising: a first tube section; a second tube segment in communication with the first tube segment; and an adjustment fixing structure connected with the first pipe section and the second pipe section, wherein the adjustment fixing structure is configured to fix the first pipe section and the second pipe section after the first pipe section is adjusted to a specified position relative to the second pipe section.

In some embodiments, one end of the first tube section is embedded in the inner cavity of the second tube section and is movable relative to the second tube section in the axial direction of the second tube section.

In some embodiments, the adjustment fixture structure comprises: the first locking sleeve is sleeved outside the first pipe section; the inner circumferential surface of the first locking sleeve is in threaded connection with the outer circumferential surface of the first pipe section; a first limiting shaft shoulder is arranged at one end, close to the second pipe section, of the first locking sleeve; the second locking sleeve is sleeved outside the first locking sleeve; the second locking sleeve comprises a first sleeve section and a second sleeve section which are connected with each other, the inner diameter of the first sleeve section is smaller than the outer diameter of the first limiting shaft shoulder, the inner diameter of the second sleeve section is larger than or equal to the outer diameter of the first limiting shaft shoulder, and an inner thread is arranged on the inner circumferential surface of the second sleeve section; and the outer peripheral surface of the second pipe section is provided with an external thread matched with the internal thread of the second sleeve section.

In some embodiments, the wall of the second sleeve section is provided with at least one locking through hole; the adjusting fixing structure further includes: at least one locking pin; the locking pin can penetrate through the locking through hole and is clamped in the thread tooth groove of the external thread of the second pipe section.

In some embodiments, a second limiting shaft shoulder is arranged at an end part, close to the first pipe section, of the second pipe section, at least two first through holes are formed in the second limiting shaft shoulder, and the at least two first through holes extend along the axial direction of the second pipe section and are sequentially distributed at intervals along the circumferential direction of the second pipe section; the adjusting fixing structure includes: one end of one locking screw rod is fixedly connected with the first pipe section, and the other end of the locking screw rod penetrates through one first through hole; and at least two sets of locking nuts, a set of locking nut with one the locking screw rod is connected, every set of locking nut includes two the locking nut, two the locking nut is located respectively the both sides of first through-hole axis direction.

In some embodiments, the first transition structure further comprises: the first connecting part is arranged at a port of the first pipe section, which is far away from the second pipe section, and is used for connecting the connecting pipe or the fracturing conveying device or another adapter structure; and the second connecting part is positioned at a port of the second pipe section, which is far away from the first pipe section, and is used for connecting the connecting pipe or the fracturing conveying device or the other adapter structure.

In some embodiments, the first coupling portion is fixedly or rotatably coupled to the first pipe segment; the second connecting part is fixedly connected or rotatably connected with the second pipe section.

In some embodiments, the at least one adapter structure comprises a second adapter structure comprising: a third tube section; and a fourth tube section; wherein a port of the third pipe section and a port of the fourth pipe section are fixedly connected, and the third pipe section and the fourth pipe section are crossed.

In some embodiments, the included angle between the third tube segment and the fourth tube segment is greater than or equal to 90 ° and less than 180 °.

In some embodiments, the second adapter structure further comprises: the third connecting part is arranged at the other port of the third pipe section and is used for connecting the connecting pipe or the fracturing conveying device or the other switching structure; and the fourth connecting part is positioned at the other port of the fourth pipe section and is used for connecting the connecting pipe or the fracturing conveying device or the other switching structure.

In some embodiments, the third connecting portion is sleeved outside the third pipe section and is rotatably connected with the third pipe section.

In some embodiments, the other port of the third pipe section is provided with a spacing edge and a spacing groove which are arranged at intervals; the second switching structure further includes: and the limiting retainer ring and the limiting edge limit the third connecting part to move along the axis direction of the third pipe section.

In some embodiments, the fourth connection portion is fixedly or rotatably connected to the fourth pipe segment.

In a second aspect, some embodiments of the present invention further provide a transition structure, including: a first tube section; a second tube segment in communication with the first tube segment; and an adjustment fixing structure connected with the first pipe section and the second pipe section, wherein the adjustment fixing structure is configured to fix the first pipe section and the second pipe section after the first pipe section is adjusted to a specified position relative to the second pipe section.

In some embodiments, the adjustment fixture structure comprises: the first locking sleeve is sleeved outside the first pipe section; the inner circumferential surface of the first locking sleeve is in threaded connection with the outer circumferential surface of the first pipe section; a first limiting shaft shoulder is arranged at one end, close to the second pipe section, of the first locking sleeve; the second locking sleeve is sleeved outside the first locking sleeve; the second locking sleeve comprises a first sleeve section and a second sleeve section which are connected with each other, the inner diameter of the first sleeve section is smaller than the outer diameter of the first limiting shaft shoulder, the outer diameter of the second sleeve section is larger than or equal to the outer diameter of the first limiting shaft shoulder, and an inner thread is arranged on the inner circumferential surface of the second sleeve section; and the outer peripheral surface of the second pipe section is provided with an external thread matched with the internal thread of the second sleeve section.

In some embodiments, the adapting structure further comprises: the first connecting part is arranged at a port of the first pipe section, which is far away from the second pipe section, and is used for connecting a part to be connected with the switching structure; and the second connecting part is positioned at a port of the second pipe section, which is far away from the first pipe section, and is used for connecting a part to be connected with the switching structure.

In a third aspect, some embodiments of the present invention further provide a transition structure, including: a third tube section; and a fourth tube section; wherein a port of the third pipe section and a port of the fourth pipe section are fixedly connected, and the third pipe section and the fourth pipe section are crossed.

In some embodiments, the second adapter structure further comprises: the third connecting part is arranged at the other port of the third pipe section and is used for connecting a part to be connected with the switching structure; and the fourth connecting part is positioned at the other port of the fourth pipe section and is used for connecting a part to be connected with the switching structure.

The fracturing conveying system and the switching structure provided by the invention have the following beneficial effects:

the fracturing conveying system provided by the invention can adjust the length of the connecting pipe assembly through at least one switching structure so as to eliminate the difference between the length of the connecting pipe and the distance between two fracturing conveying devices; the installation angle between the interfaces of the connecting pipe and the fracturing conveying device can be adjusted through at least one switching structure, the connecting pipe is not required to be excessively bent, the connecting pipe and the fracturing conveying device can be connected, and smooth transition of connection between the connecting pipe and the fracturing conveying device is achieved. Therefore, the fracturing conveying system provided by the invention avoids the problems that the pipe body of the connecting pipe is damaged or the connecting position is easy to erode and wear due to forced connection caused by the fact that the connecting pipe is directly connected with the corresponding interfaces of the two fracturing conveying devices, prolongs the service lives of the connecting pipe and the fracturing conveying devices, reduces the labor intensity of installation operation on a fracturing site, and improves the disassembly and installation efficiency. In addition, the connecting mode can also reduce the requirements on the arrangement and the arrangement direction of devices on the fracturing site, and further improves the installation operation efficiency.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of the components of a fracturing delivery system of the related art;

FIG. 2 is a schematic diagram of the connection of a portion of a fracturing delivery system in a related art;

FIG. 3 is a schematic illustration of a fracture delivery system section apparatus connection according to some embodiments of the present invention;

FIG. 4 is a schematic illustration of a fracture delivery system section apparatus according to further embodiments of the present invention;

FIG. 5 is a schematic view of a first configuration of a first adapter structure according to some embodiments of the present invention in a first length state;

FIG. 6 is a schematic diagram of a second length state of a first adapter structure according to some embodiments of the invention;

FIG. 7 is a schematic diagram illustrating a first configuration of a first adapter structure in a first length state according to further embodiments of the present invention;

FIG. 8 is a schematic diagram illustrating a second length state of a first adapter structure according to further embodiments of the present invention;

fig. 9 is a schematic structural diagram of a second adapter structure according to some embodiments of the invention.

Reference numerals: 100-a frac delivery system; 1-a fracturing conveyor; 11-a fracturing truck; prying a high-pressure manifold and a low-pressure manifold; 13-shunting pry; 14-fracturing the tree; 2-connecting the pipe assembly; 21-connecting pipe; 22-a transition structure; 221-a first adapting structure; 2211-a first tube segment; 2212-a second tube segment; 22121-second stop collar; 2213-adjusting the fixation structure; 22131-a first locking sleeve; 22131 a-first stop shoulder; 22132-a second locking sleeve; 22132 a-first sleeve section; 22132 b-second sleeve section; 22133-locking pin; 22134-locking screw; 22135-locking nut; 2214-a first connection; 2215-a second connecting portion; 222-a second adapter structure; 2221-a third tube segment; 22211-limit edges; 2222-a fourth tube segment; 2223-a third connecting portion; 2224-fourth connecting part; 2225-limit retainer ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; the specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the embodiments of the present application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

In the embodiments of the present application, words such as "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

Referring to fig. 1 and 3, some embodiments of the present invention provide a frac delivery system 100 including a plurality of frac delivery devices 1 and at least one connector tube assembly 2. A connecting pipe assembly 2 is communicated with two fracturing conveying devices 1; the connecting pipe assembly 2 comprises at least one section of connecting pipe 21 and at least one adapter structure 22, and the at least one adapter structure 22 is located between the connecting pipe 21 and the fracturing conveying device 1 and/or between two adjacent sections of connecting pipes 21.

For example, as shown in fig. 1, the two fracturing conveying devices 1 may be a fracturing truck 11 and a high-low pressure manifold pry 12; or, the two fracturing conveying devices 1 may also be two high-low pressure manifold skids 12; or, the two fracturing conveying devices 1 can also be a high-low pressure manifold pry 12 and a flow dividing pry 13; or, the two fracturing conveying devices 1 can also be a flow dividing pry 13 and a wellhead fracturing tree 14; alternatively, the two fracturing conveyors 1 may be a fracturing truck 11 and a wellhead fracturing tree 14.

Illustratively, the number of connecting pipe assemblies 2 may be one, communicating one fracturing truck 11 and one wellhead fracturing tree 14; alternatively, as shown in fig. 1, when the number of the fracturing conveyors 1 to be communicated is greater than two, the number of the connecting pipe assemblies 2 may be multiple, and every two fracturing conveyors 1 to be communicated are communicated through one connecting pipe assembly 2.

Illustratively, the number of the connection pipes 21 in each connection pipe assembly 2 may be one; alternatively, the number of the connection pipes 21 in each connection pipe assembly 2 may be plural, and the plural connection pipes 21 are connected in series.

The connection pipe 21 is a flexible pipe, and may be elastically extended to a certain degree or bent to a certain angle.

It should be noted that in other embodiments, the connection tube 21 may be a rigid metal pipeline, and the same may be applied.

Illustratively, the number of the adapter structures 22 may be one; alternatively, the number of the adapter structures 22 may be plural.

Illustratively, the at least one adapter 22 may be one or more adapters capable of adjusting the connection angle between the connection pipe 21 and the interface of the fracturing conveying device 1; alternatively, the at least one adapter 22 may be one or more adapters capable of adjusting the connection length of the connection pipe 21; alternatively, as shown in fig. 3 and 4, at least one adapter 22 may be a combination of an adapter capable of adjusting the connection angle between the connection pipe 21 and the interface of the fracturing fluid delivery device 1 and an adapter capable of adjusting the connection length of the connection pipe 21. The specific application mode can be selected and determined according to the layout of the devices on the fracturing operation site.

Illustratively, in one connecting pipe assembly 2, when the number of the adapter structures 22 and the number of the connecting pipes 21 are both one: the switching structure 22 is positioned between the connecting pipe 21 and one fracturing conveying device 1; when the number of the adapter structures 22 is one and the number of the connection pipes 21 is plural: the switching structure 22 can be positioned between one connecting pipe 21 and one fracturing conveying device 1, or between two adjacent connecting pipes 21; as shown in fig. 3 and 4, when the number of the adapter structures 22 is plural and the number of the connection pipes 21 is one: the switching structures 22 can be completely positioned between the connecting pipe 21 and one fracturing conveying device 1, or can be divided into two groups which are respectively positioned between the connecting pipe 21 and two fracturing conveying devices 1; when the number of the adapter structures 22 is plural and the number of the connection pipes 21 is plural: the adapting structures 22 may be all located between one connecting pipe 21 and one fracturing conveying device 1, may also be all located between two adjacent connecting pipes 21, and may also be divided into multiple groups, which are located between the connecting pipe 21 and two fracturing conveying devices 1 and between two adjacent connecting pipes 21, respectively. The specific application mode can be selected and determined according to the layout of the devices on the fracturing operation site.

The fracturing conveying system 100 provided by the invention can adjust the length of the connecting pipe assembly 2 through at least one switching structure 22 so as to eliminate the difference between the length of the connecting pipe 21 and the distance between two fracturing conveying devices 1; the installation angle between the interfaces of the connecting pipe 21 and the fracturing conveying device 1 can be adjusted through at least one switching structure 22, the connecting pipe 21 is not required to be bent excessively to realize the connection between the connecting pipe 21 and the fracturing conveying device 1, and smooth transition of connection between the connecting pipe 21 and the fracturing conveying device 1 is realized. Therefore, the fracturing conveying system 100 provided by the invention avoids the problem that the pipe body of the connecting pipe 21 is damaged or the connecting position is easy to erode and wear due to forced connection because the connecting pipe 21 is directly connected with the corresponding interfaces of the two fracturing conveying devices 1, prolongs the service lives of the connecting pipe 21 and the fracturing conveying devices 1, reduces the labor intensity of installation operation on a fracturing site, and improves the disassembly and installation efficiency. In addition, the connecting mode can also reduce the requirements on the arrangement and the arrangement direction of devices on the fracturing site, and further improves the installation operation efficiency.

Referring to fig. 5-8, in some embodiments, the at least one transition structure 22 includes a first transition structure 221, the first transition structure 221 including a first tube segment 2211, a second tube segment 2212, and an adjustment fixing structure 2213. The second segment 2212 is in communication with the first segment 2211. An adjustment fixture 2213 is coupled to the first and

second segments

2211 and 2212, and the adjustment fixture 2213 is configured to secure the first and

second segments

2211 and 2212 after the first segment 2211 is adjusted to a desired position relative to the second segment 2212. In this way, the length of the first transfer structure 221, and thus the length of the connection pipe assembly 2, can be adjusted by moving the first pipe segment 2211 relative to the second pipe segment 2212, so as to eliminate the difference between the length of the connection pipe 21 and the distance between the two fracturing conveyors 1, and to achieve smooth transition of the connection between the connection pipe 21 and the fracturing conveyors 1; the first tube segment 2211 and the second tube segment 2212 are fixed at corresponding positions by adjusting the fixing structure 2213, so that the reliability of the first transfer structure 221 is ensured.

Illustratively, the first and

second tube segments

2211 and 2212 may be directly connected, and the relative positions may be fixed by adjusting the fixing structure 2213; alternatively, the first and

second tube segments

2211 and 2212 may be indirectly connected by the adjustment fixing structure 2213, and the relative position may be fixed by the adjustment fixing structure 2213.

Referring to fig. 5-8, in some embodiments, one end of the first tube segment 2211 is embedded in the inner cavity of the second tube segment 2212 and is movable relative to the second tube segment 2212 in the axial direction of the second tube segment 2212. In this manner, the first and

second tube segments

2211 and 2212 are directly connected, simplifying the connection structure and enhancing the overall reliability of the first adapter structure 221.

Illustratively, the first and

second tube segments

2211 and 2212 may both be straight tube segments; alternatively, one of the first and

second tube segments

2211 and 2212 may be a bent tube segment and the other a straight tube segment.

Illustratively, the end of the first tube segment 2211 that is inserted into the interior of the second tube segment 2212 is sealed circumferentially to the wall of the interior of the second tube segment 2212 by a sealing ring.

Illustratively, the outer and inner diameters of the first and

second tube segments

2211 and 2212 may each be constant; alternatively, the first tube 2211 may have a stepped shaft type outer circumference and the second tube 2212 may have a stepped hole type inner cavity.

Referring to fig. 5 and 6, in some embodiments, the adjustment fixture 2213 includes a first locking sleeve 22131 and a second locking sleeve 22132. The first locking sleeve 22131 is sleeved outside the first pipe section 2211; the inner circumferential surface of the first locking sleeve 22131 is screwed with the outer circumferential surface of the first tube segment 2211; the first locking sleeve 22131 is provided with a first stop shoulder 22131a at an end adjacent to the second tube segment 2212. The second locking sleeve 22132 is sleeved outside the first locking sleeve 22131; the second locking sleeve 22132 comprises a first sleeve section 22132a and a second sleeve section 22132b connected to each other, the inner diameter of the first sleeve section 22132a is smaller than the outer diameter of the first limit shoulder 22131a, the inner diameter of the second sleeve section 22132b is larger than or equal to the outer diameter of the first limit shoulder 22131a, and the inner circumferential surface of the second sleeve section 22132b is provided with internal threads. Wherein, the outer circumference of the second tube segment 2212 is provided with an external thread matching with the internal thread of the second sleeve segment 22132 b.

So designed, the first tube segment 2211 can be moved relative to the second tube segment 2212 by rotating the first locking sleeve 22131; after the first tube segment 2211 is adjusted to a specific position relative to the second tube segment 2212, the inner circumferential surface of the second sleeve segment 22132b is in threaded connection with the outer circumferential surface of the second tube segment 2212, the end surface of the first sleeve segment 22132a close to the second sleeve segment 22132b is abutted against the first limiting shaft shoulder 22131a, and the end surface of the first locking sleeve 22131 close to the second tube segment 2212 is abutted against the end surface of the second tube segment 2212, so that the first tube segment 2211 and the second tube segment 2212 are fixed. The adjusting and fixing structure 2213 has the advantages of driving function, fixing function, simple structure and reliable performance.

Illustratively, the first locking sleeve 22131 and the second locking sleeve 22132 are provided with radial driving holes on their outer circumferential surfaces, so as to facilitate connection of an external driving member to drive the first locking sleeve 22131 and the second locking sleeve 22132 to rotate to adjust the length of the first rotation connecting structure 221 and fix the first tube segment 2211 and the second tube segment 2212 relatively.

Illustratively, the end surface of the first limiting shoulder 22131a close to the second tube segment 2212 is coplanar with the end surface of the first tube segment 2211 close to the second tube segment 2212, so as to increase the abutting area of the first locking sleeve 22131 and the second tube segment 2212, ensure the effect of relatively fixing the first tube segment 2211 and the second tube segment 2212, and further ensure the overall reliability of the first rotation-connection structure 221.

Illustratively, the outer diameters of the first sleeve section 22132a and the second sleeve section 22132b are the same.

Illustratively, the first tube segment 2211 is provided with external threads on the outer circumferential surface thereof in the middle area along the axial direction of the first tube segment 2211 for screwing with the first locking sleeve 22131.

Illustratively, the first sleeve segment 22132a is clearance fit with the outer peripheral surface of the first locking sleeve 22131 except for the first stop shoulder 22131 a; the second sleeve section 22132b is clearance fit with the first stop shoulder 22131 a.

Referring to fig. 5 and 6, in some embodiments, the wall of the second sleeve section 22132b defines at least one locking through-hole. The adjustment fixture 2213 further includes at least one locking pin 22133; the locking pin 22133 can pass through the locking through hole to snap into the threaded socket of the external threads of the second tube segment 2212. In this way, the first tube segment 2211 and the second tube segment 2212 are further fixed, so as to prevent the adjustment fixing structure 2213 from failing due to the failure of the threaded connection between the second sleeve segment 22132b and the second tube segment 2212, and further prevent the entire first rotation-connecting structure 221 from failing.

Illustratively, the number of locking pins 22133 is four, and they are equally angularly distributed along the circumference of the second sleeve section 22132 b.

Referring to fig. 7 and 8, in some embodiments, a second limiting shoulder 22121 is disposed at an end of the second tube segment 2212 close to the first tube segment 2211, and at least two first through holes are disposed on the second limiting shoulder 22121, and extend along an axial direction of the second tube segment 2212 and are sequentially spaced along a circumferential direction of the second tube segment 2212. The adjustment fixture 2213 includes at least two locking screws 22134 and at least two sets of locking nuts 22135. A locking screw 22134 is fixedly connected at one end to the first tube segment 2211 and at the other end through a first through hole. A set of locking nuts 22135 is connected to one locking screw 22134, and each set of locking nuts 22134 includes two locking nuts 22134, and the two locking nuts 22134 are respectively located on two sides of the first through hole in the axial direction.

With this arrangement, after the first tube segment 2211 is adjusted to a predetermined position relative to the second tube segment 2212, the two locking nuts 22134 are respectively abutted against the end surfaces of the two ends of the first through hole to fix the first tube segment 2211 and the second tube segment 2212. The adjusting and fixing mode has simple structure and reliable connection.

Illustratively, the number of the first through holes is eight, and the first through holes are distributed at equal angles along the circumferential direction of the second tube segment 2212.

Referring to fig. 5-8, in some embodiments, the first junction structure 221 further includes a first connection portion 2214 and a second connection portion 2215. A first connection 2214 is mounted at a port of the first pipe segment 2211 remote from the second pipe segment 2212, the first connection 2214 is used for connecting the connecting pipe 21 or the fracturing fluid delivery device 1 or another of the transition structures 22. A second connection portion 2215 is located at a port of the second pipe segment 2212 far from the first pipe segment 2211, and the second connection portion 2215 is used for connecting the connecting pipe 21 or the fracturing conveying device 1 or another adapter structure 22. In this way, the first junction structure 221 is facilitated to be connected with the corresponding interface of the component to be connected.

Illustratively, the first and

second connection portions

2214 and 2215 are flange connection structures.

In other embodiments, the first connection portion 2214 and the second connection portion 2215 may be a union connection structure, a screw connection structure, or a clip connection structure, and may be used.

Referring to fig. 5-8, in some embodiments, the first connection 2214 is fixedly or rotatably connected to the first tube segment 2211. The second connecting portion 2215 is fixedly or rotatably connected to the second tube segment 2212.

Illustratively, as shown in fig. 5 and 6, the first connection 2214 is rotatably connected to the first tube 2211, and the second connection 2215 is fixedly connected to the second tube 2212.

Illustratively, as shown in fig. 7 and 8, the first connecting portion 2214 is fixedly connected to the first tube segment 2211, and the second connecting portion 2215 is fixedly connected to the second tube segment 2212.

It should be noted that in other embodiments, the first connection 2214 can be rotatably connected to the first tube 2211, and the second connection 2215 can be rotatably connected to the second tube 2212, and the same can be used.

Referring to fig. 9, in some embodiments, at least one adapter structure 22 includes a second adapter structure 222, the second adapter structure 222 including a third tube segment 2221 and a fourth tube segment 2222. Wherein one port of the third pipe section 2221 and one port of the fourth pipe section 2222 are fixedly connected, and the third pipe section 2221 and the fourth pipe section 2222 are crossed. Therefore, the installation angle between the interfaces of the connecting pipe 21 and the fracturing conveying device 1 can be adjusted through the second adapter structure 222, the connecting pipe 21 and the fracturing conveying device 1 can be connected without excessively bending the connecting pipe 21, and smooth transition of connection between the connecting pipe 21 and the fracturing conveying device 1 is realized.

Illustratively, the third tube section 2221 and the fourth tube section 2222 may be a unitary structure.

Referring to fig. 9, in some embodiments, the included angle α between the third tube section 2221 and the fourth tube section 2222 is greater than or equal to 90 °, and less than 180 °. The angle alpha between the third and fourth pipe sections may be selected according to the layout of the apparatus at the fracturing job site.

Illustratively, the angle α between the third and

fourth pipe sections

2221, 2222 may be 90 °, 120 °, 135 °, 150 °, which may be selected based on the layout of the equipment at the fracturing job site.

Referring to fig. 9, in some embodiments, the second adapting structure 222 further includes a third connecting portion 2223 and a fourth connecting portion 2224. A third connection portion 2223 is mounted at another port of the third pipe section 2221, and the third connection portion 2223 is used for connecting the connection pipe 21 or the fracture conveying device 1 or another adapter structure 22. A fourth connection 2224 is located at another port of the fourth pipe section 2222, and the fourth connection 2222 is used to connect the connection pipe 21 or the fracture conveying device 1 or another adapter structure 22. In this way, the second adapting structure 222 is convenient to be connected with the corresponding interface of the component needing to be connected.

Illustratively, the third connecting portion 2223 and the fourth connecting portion 2224 are flange connection structures.

In other embodiments, the third connecting portion 2223 and the fourth connecting portion 2224 may be a union connection structure, a screw connection structure, or a clip connection structure, and may be used.

Referring to fig. 9, in some embodiments, the third connecting portion 2223 is sleeved outside the third pipe section 2221 and is rotatably connected to the third pipe section 2221. Thus, when the second adapter structure 222 is connected to other components, the third connection portion 2223 can rotate relative to the third tube section 2221, so that the corresponding connection hole can be aligned, thereby reducing the installation difficulty and improving the installation efficiency.

Referring to fig. 9, in some embodiments, the other port of the third tube section 2221 has a spacing set of stop edges 22211 and stop grooves. The second adapting structure 222 further includes a limit stop 2225 located in the limit groove, and the limit stop 2225 and the limit edge 22211 together limit the movement of the third connecting portion 2223 along the axial direction of the third pipe section 2221. In this way, the third connecting portion 2223 can be prevented from slipping off when the third pipe section 2221 is facing upward in practical use.

For example, the third connecting portion 2223 may abut against the position-limiting edge 22211 and the position-limiting retainer ring 2225; alternatively, the third connection portion 2223 may be used without coming into contact with the stopper edge 22211 and the stopper ring 2225.

Illustratively, the position limiting stop 2225 is a collar, which is easy to mount and dismount.

Referring to fig. 9, in some embodiments, fourth connection portion 2224 is fixedly or rotatably connected to fourth tube section 2222.

Illustratively, as shown in fig. 9, the fourth connection portion 2224 is a unitary structure with the fourth tube section 2222.

It should be noted that, in other embodiments, the fourth connecting portion 2224 and the fourth tube section 2222 may also be rotatably connected, and the same may also be applied.

Referring to fig. 5 to 8, some embodiments of the present invention further provide an adapting structure 22, where the adapting structure 22 is the first adapting structure 221 in the fracturing conveying system 100 according to any of the embodiments, and specific structures and technical effects are not described herein again.

Referring to fig. 9, some embodiments of the present invention further provide an adapting structure 22, where the adapting structure 22 is the second adapting structure 222 in the fracturing conveying system 100 according to any of the embodiments, and specific structures and technical effects are not described herein again.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A frac delivery system, comprising:

a plurality of fracture conveyance devices; and

at least one connecting pipe assembly, wherein one connecting pipe assembly is communicated with two fracturing conveying devices; the connecting pipe assembly comprises at least one section of connecting pipe and at least one adapter structure, and the at least one adapter structure is positioned between the connecting pipe and the fracturing conveying device and/or between two adjacent sections of connecting pipe.

2. The frac delivery system of claim 1,

the at least one transition structure includes a first transition structure comprising:

a first tube section;

a second tube segment in communication with the first tube segment; and

and the adjusting and fixing structure is connected with the first pipe section and the second pipe section, and is configured to be capable of fixing the first pipe section and the second pipe section after the first pipe section is adjusted to a specified position relative to the second pipe section.

3. The frac delivery system of claim 2,

one end of the first pipe section is embedded in the inner cavity of the second pipe section and can move relative to the second pipe section along the axial direction of the second pipe section.

4. The frac delivery system of claim 3,

the adjusting fixing structure includes:

the first locking sleeve is sleeved outside the first pipe section; the inner circumferential surface of the first locking sleeve is in threaded connection with the outer circumferential surface of the first pipe section; a first limiting shaft shoulder is arranged at one end, close to the second pipe section, of the first locking sleeve; and

the second locking sleeve is sleeved outside the first locking sleeve; the second locking sleeve comprises a first sleeve section and a second sleeve section which are connected with each other, the inner diameter of the first sleeve section is smaller than the outer diameter of the first limiting shaft shoulder, the inner diameter of the second sleeve section is larger than or equal to the outer diameter of the first limiting shaft shoulder, and an inner thread is arranged on the inner circumferential surface of the second sleeve section;

and the outer peripheral surface of the second pipe section is provided with an external thread matched with the internal thread of the second sleeve section.

5. The frac delivery system of claim 4,

the wall of the second sleeve section is provided with at least one locking through hole;

the adjusting fixing structure further includes:

at least one locking pin; the locking pin can penetrate through the locking through hole and is clamped in the thread tooth groove of the external thread of the second pipe section.

6. The frac delivery system of claim 3,

a second limiting shaft shoulder is arranged at the end part, close to the first pipe section, of the second pipe section, at least two first through holes are formed in the second limiting shaft shoulder, and the at least two first through holes extend along the axial direction of the second pipe section and are sequentially distributed at intervals along the circumferential direction of the second pipe section;

the adjusting fixing structure includes:

one end of one locking screw rod is fixedly connected with the first pipe section, and the other end of the locking screw rod penetrates through one first through hole; and

at least two sets of lock nut, a set of lock nut with one the locking screw is connected, and every group lock nut includes two the lock nut, two the lock nut is located respectively the both sides of first through-hole axis direction.

7. The frac delivery system of claim 2,

the first transfer structure further includes:

the first connecting part is arranged at a port of the first pipe section, which is far away from the second pipe section, and is used for connecting the connecting pipe or the fracturing conveying device or another adapter structure; and

and the second connecting part is positioned at a port of the second pipe section, which is far away from the first pipe section, and is used for connecting the connecting pipe or the fracturing conveying device or the other adapter structure.

8. The frac delivery system of claim 7,

the first connecting part is fixedly connected or rotatably connected with the first pipe section;

the second connecting part is fixedly connected or rotatably connected with the second pipe section.

9. The frac conveyance system of any one of claims 1-8, wherein the at least one adapter structure comprises a second adapter structure comprising:

a third tube section; and

a fourth tube section;

wherein a port of the third pipe section and a port of the fourth pipe section are fixedly connected, and the third pipe section and the fourth pipe section are crossed.

10. The frac conveyance system of claim 9, wherein the included angle between the third pipe segment and the fourth pipe segment is greater than or equal to 90 ° and less than 180 °.

11. The frac delivery system of claim 9, wherein the second transition structure further comprises:

the third connecting part is arranged at the other port of the third pipe section and is used for connecting the connecting pipe or the fracturing conveying device or the other switching structure; and

and the fourth connecting part is positioned at the other port of the fourth pipe section and is used for connecting the connecting pipe or the fracturing conveying device or the other switching structure.

12. The frac delivery system of claim 11,

the third connecting part is sleeved outside the third pipe section and is rotatably connected with the third pipe section.

13. The frac delivery system of claim 12,

the other port of the third pipe section is provided with a limiting edge and a limiting groove which are arranged at intervals;

the second switching structure further includes: and the limiting retainer ring and the limiting edge limit the third connecting part to move along the axis direction of the third pipe section.

14. The frac delivery system of claim 11,

the fourth connecting part is fixedly connected or rotatably connected with the fourth pipe section.

15. An adapter structure, comprising:

a first tube section;

a second tube segment in communication with the first tube segment; and

16. The transition structure according to claim 15,

17. The transition structure according to claim 16,

the adjusting fixing structure includes:

the second locking sleeve is sleeved outside the first locking sleeve; the second locking sleeve comprises a first sleeve section and a second sleeve section which are connected with each other, the inner diameter of the first sleeve section is smaller than the outer diameter of the first limiting shaft shoulder, the outer diameter of the second sleeve section is larger than or equal to the outer diameter of the first limiting shaft shoulder, and an inner thread is arranged on the inner circumferential surface of the second sleeve section;

18. The transition structure according to claim 17,

the adjusting fixing structure further includes:

19. The transition structure according to claim 16,

the adjusting fixing structure includes:

20. The transition structure according to claim 15,

the switching structure further includes:

the first connecting part is arranged at a port of the first pipe section, which is far away from the second pipe section, and is used for connecting a part to be connected with the switching structure; and

and the second connecting part is positioned at a port of the second pipe section, which is far away from the first pipe section, and is used for connecting a part to be connected with the switching structure.

21. The transition structure according to claim 20,