A quick-connect manifold for fracturing

Abstract

The application discloses a quick connecting manifold device for fracturing, which comprises a bearing vehicle, a multi-degree-of-freedom manifold, a hoisting device, a power and control unit and a balance adjusting beam which are respectively installed on the bearing vehicle; the power and control unit and the hoisting device are arranged at the free space on one side of the multi-degree-of-freedom manifold, the balance adjusting beam is arranged at the free space at the tail end of the multi-degree-of-freedom manifold, the power and control unit is drivingly connected with the hoisting device, the hoisting device cooperates with the balance adjusting beam to jointly drive the multi-degree-of-freedom manifold to move to the well mouth position and be connected with the well mouth. The device changes the traditional complicated pipeline connection mode of the oil and gas well fracturing, and solves the problems of large labor intensity, many safety risk points, long installation time and complicated operation in the existing operation technology.

Description

Technical Field

[0001] This invention belongs to the technical field of oil drilling and production equipment, and relates to a quick-connect manifold device for fracturing. Background Technology

[0002] Formation fracturing technology is currently the most effective means of increasing production and efficiency in oil and gas extraction. It involves injecting high-pressure, high-flow-rate fracturing fluid into the formation via pumps, creating cracks and providing a flow path for oil and gas. In current oil and gas drilling, follow-through drilling technology is widely used, and zipper-style operations are frequently employed during well completion to improve efficiency. However, traditional zipper-style operations involve complex pipeline connections, high operational risks, and require significant installation work, long preparation times, and low operational efficiency.

[0003] In existing zipper-type fracturing equipment, the fracturing truck and manifold generate high-pressure fracturing fluid, which is then collected via a fracturing manifold skid and connected to a so-called zipper device. This zipper device has multiple controllable output ports, each connected to one or more manifolds, which in turn connect to the working wellhead. The delivery of fracturing fluid to the working wellhead is controlled independently by valves installed on the pipeline, allowing for the delivery of fracturing fluid to different working wellheads at different times and during different processes. However, this method has significant drawbacks. Using small-diameter pipes involves numerous connections of fittings and elbows, resulting in long installation times. Furthermore, under high pressure, more connection points mean more risk points and higher safety risks. While using a single, multi-degree-of-freedom, large-diameter fracturing fluid delivery pipe (commonly known as a "single-pipe universal") to connect to the wellhead simplifies the connection process to some extent, its significant disadvantages include its heavy weight, difficulty in positioning, and the need for a crane to complete the manifold connection, making the process time-consuming and labor-intensive. Summary of the Invention

[0004] The purpose of this invention is to provide a quick-connect manifold device for fracturing, which solves the problems of high labor intensity, numerous safety risks, long installation time, and complex operation in existing fracturing techniques.

[0005] The technical solution adopted in this invention is a quick-connect manifold device for fracturing, comprising a carrier vehicle on which a multi-degree-of-freedom manifold, a hoisting device, a power and control unit, and a balance adjustment beam are respectively installed. The power and control unit and the hoisting device are both located in the empty position on one side of the multi-degree-of-freedom manifold, and the balance adjustment beam is located in the empty position at the tail end of the multi-degree-of-freedom manifold. The power and control unit is driven and connected to the hoisting device, and the hoisting device works in conjunction with the balance adjustment beam to jointly drive the multi-degree-of-freedom manifold to the wellhead position for docking with the wellhead.

[0006] The quick-connect manifold device for fracturing of the present invention is further characterized in that:

[0007] The structure of the multi-degree-of-freedom manifold includes a base and an input head. The base and input head are fixed on the carrier vehicle as the base of the multi-degree-of-freedom manifold, and the inlet end of the base and input head is used to connect to the fracturing truck assembly.

[0008] The base and the outlet end of the input head are equipped with a movable joint 1. The movable joint 1 is connected in sequence to the straight pipe short section 1 and the elbow 1 to form the first movable joint.

[0009] A straight pipe section 2 is installed at the outlet end of elbow 1. Straight pipe section 2 is connected in sequence with movable joint 2 and elbow 2 to form the second movable joint. Straight pipe section 2 is equipped with a support rod.

[0010] A straight pipe short section three is installed at the outlet end of elbow two. Straight pipe short section three is connected in sequence with movable joint three and elbow three to form the third movable joint.

[0011] The outlet end of elbow three is equipped with straight pipe short section four. Straight pipe short section four is connected in sequence with movable joint four and elbow four to form the fourth movable joint.

[0012] The elbow has a movable joint five installed at the outlet end. The movable joint five is connected in sequence with the straight pipe short section five and the tail quick connector to form the fifth movable joint.

[0013] The first specific structure of the movable joint includes a first connector and a second connector. An inner stop is fitted on the external thread of the middle section of the first connector. The second connector is fitted on the small end of the first connector. A clamp is fastened to the outer stepped end face of the second connector, the inner stop, and the inner side of the large end of the first connector. Bearings 1 and 2 are installed in the inner stop. The clamp is a two-part split structure. The inner surface of the clamp is fastened to bearings 1 and 2. An outer ring is fitted on the stepped groove on the outer surface of the clamp. A retaining ring is also provided at the end of the stepped groove.

[0014] The second specific structure of the movable joint includes pipe three and pipe four, which are symmetrical structures facing each other from left to right. The pipe openings of pipe three and pipe four are connected by an inner ring sleeve. A clamp two is fastened together on the outer circumference of pipe three, inner ring sleeve and pipe four. The clamp two is a two-part split structure. An outer ring sleeve two is fitted on the stepped groove on the outer surface of the clamp two. A retaining ring two is provided at the end of the stepped groove.

[0015] The beneficial effects of this invention are that it changes the traditional and complex pipeline connection method for fracturing oil and gas wells. A single quick-connect manifold device replaces the original zipper-like operation that required multiple manifold systems and valve groups to complete multi-well site operations. The manifold has a large diameter, which can meet the application of up to 7-inch diameter pipes. It is resistant to high pressure, with a rated working pressure of up to 15,000 PSI. It has multiple degrees of freedom of combination to meet the connection needs of all well sites within the working range. It can achieve remote operation by one person to complete the rapid switching of multiple well sites. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the device of the present invention;

[0017] Figure 2 This is a schematic diagram of the multi-degree-of-freedom manifold structure of the present invention;

[0018] Figure 3 This is a schematic diagram of the movable joint structure according to the first embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of the movable joint structure according to the second embodiment of the present invention.

[0020] Figure 5 This is a schematic diagram showing the arrangement of the device of the present invention in its on-site working state;

[0021] Figure 6 It is the first typical structural arrangement of a zipper-type fracturing equipment in existing technology;

[0022] Figure 7 This is the second typical structural arrangement of zipper-type fracturing equipment in existing technology.

[0023] In the diagram: 1. Carrier vehicle; 2. Multi-degree-of-freedom manifold; 3. Lifting equipment; 4. Power and control unit; 5. Balance adjustment beam; 6. Fracturing truck and manifold; 7. Working wellhead;

[0024] 2-1a. Movable connector one; 2-1b. Movable connector two; 2-1c. Movable connector three; 2-1d. Movable connector four; 2-1e. Movable connector five; 2-2. Support rod; 2-3a. Elbow one; 2-3b. Elbow two; 2-3c. Elbow three; 2-3d. Elbow four; 2-4. Base and input head; 2-5a. Straight pipe short section one; 2-5b. Straight pipe short section two; 2-5c. Straight pipe short section three; 2-5d. Straight pipe short section four; 2-5e. Straight pipe short section five; 2-6. Tail end quick connector;

[0025] 3-1. Connector 1; 3-2. Clamp 1; 3-3. Outer Ring 1; 3-4. Inner Retainer; 3-5. Retaining Ring 1; 3-6. Main Seal; 3-7. Connector 2; 3-8. Dust Seal 1; 3-9a. Bearing 1; 3-9b. Bearing 2; 3-10. Dust Seal 2;

[0026] 4-1a. Connector 3; 4-1b. Connector 4; 4-2. Clamp 2; 4-3. Outer Ring 2; 4-4. Retaining Ring 2; 4-5. Inner Ring; 4-6a. Seal 1; 4-6b. Seal 2; 4-7. Seal 3. Detailed Implementation

[0027] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0028] like Figure 1 As shown, the overall structure of the quick-connect manifold device for fracturing of the present invention includes a carrier vehicle (or carrier skid) 1. The carrier vehicle 1 is equipped with a multi-degree-of-freedom manifold 2, a hoisting device 3, a power and control unit 4, and a balance adjustment beam 5. The carrier vehicle 1 serves as the installation platform for the other devices, facilitating the rapid overall movement of the equipment. The power and control unit 4 and the hoisting device 3 are both located in the empty space on one side of the multi-degree-of-freedom manifold 2, and the balance adjustment beam 5 is located in the empty space at the tail end of the multi-degree-of-freedom manifold 2. The power and control unit 4 is driven by the hoisting device 3, and the hoisting device 3 works in conjunction with the balance adjustment beam 5 to move the multi-degree-of-freedom manifold 2 to the wellhead position for docking. The power and control unit 4 provides power and control for the hoisting device 3 and the wellhead docking.

[0029] like Figure 2 As shown, the structure of the multi-degree-of-freedom manifold 2 includes 5 high-pressure movable joints (i.e., movable joint 1 2-1a, movable joint 2-1b, movable joint 3 2-1c, movable joint 4 2-1d, movable joint 5 2-1e), support rod 2-2, 4 high-pressure elbows (i.e., elbow 1 2-3a, elbow 2 2-3b, elbow 3 2-3c, elbow 4 2-3d), base and input head 2-4, and 5 high-pressure straight pipe sections (i.e., straight pipe section 1 2-5a, straight pipe section 2 2-5b, straight pipe section 3 2-5c, straight pipe section 4 2-5d, straight pipe section 5 2-5a). -5e) and tail quick connector (or quick connection joint) 2-6; wherein, the base and input head 2-4 are fixed on the carrier vehicle 1 as the base of the multi-degree-of-freedom manifold 2, the inlet end of the base and input head 2-4 is used to connect the fracturing truck group, and the outlet end of the base and input head 2-4 is equipped with a movable joint 2-1a. The movable joint 2-1a is connected to the straight pipe short section 2-5a and the elbow 2-3a in sequence to form the first movable joint. The first movable joint realizes the 360° rotation of the components installed after it around the vertical axis of the base and input head 2-4 through the movable joint 2-1a.

[0030] In the same combination, a straight pipe section 2-5b is installed at the outlet end of elbow 2-3a. The straight pipe section 2-5b is connected in sequence with the movable joint 2-1b and elbow 2-3b to form the second movable joint. The straight pipe section 2-5b is specially equipped with a reinforced support rod 2-2 for support and protection.

[0031] The outlet end of elbow 2-3b is equipped with straight pipe short section 3-5c. Straight pipe short section 3-5c is connected in sequence with movable joint 3-1c and elbow 3-3c to form the third movable joint.

[0032] The outlet end of elbow 3 2-3c is equipped with straight pipe short section 4 2-5d. Straight pipe short section 4 2-5d is connected in sequence with movable joint 4 2-1d and elbow 4 2-3d to form the fourth movable joint.

[0033] The outlet end of elbow 4 2-3d is equipped with movable joint 5 2-1e. Movable joint 5 2-1e is connected in sequence with straight pipe short section 5 2-5e and tail quick connector 2-6 to form the fifth movable joint.

[0034] Each movable joint can rotate 360° via its respective movable connector. Through the coordinated action of these five movable joints, the multi-degree-of-freedom manifold 2 can be positioned arbitrarily within its working range, allowing the tail-end quick connectors 2-6 to meet the insertion and removal requirements of wellheads at different locations. See [link to details]. Figure 5 .

[0035] The five movable joints of the present invention have the same structure, and two structures are given in the embodiments.

[0036] like Figure 3 As shown, the first specific structure of the movable joint includes a connecting pipe 3-1, a clamp 3-2, an outer ring 3-3, an inner stop 3-4, a retaining ring 3-5, a main seal 3-6, a connecting pipe 3-7, a dust seal 3-8, a bearing 3-9a, a bearing 3-9b, and a dust seal 3-10. The inner stop 3-4 is fitted onto the external thread of the middle section of the connecting pipe 3-1. The connecting pipe 3-7 is fitted onto the small end of the connecting pipe 3-1. The clamp 3-2 is fastened to the outer stepped end face of the connecting pipe 3-7, the inner stop 3-4, and the inner side of the large end of the connecting pipe 3-1. Bearings 3-9a and 3-9b are installed in the inner stop 3-4. b; Clamp 1 3-2 is a two-part split structure. The inner surface of clamp 1 3-2 is fastened to bearing 1 3-9a and bearing 2 3-9b, bearing the main axial force; Dustproof seal 1 3-8 is installed on the contact surface between pipe 1 3-1 and the inner surface of clamp 1 3-2, main seal 3-6 is installed on the contact surface between pipe 2 3-7 and pipe 1 3-1, and dustproof seal 2 3-10 is installed on the contact surface between pipe 2 3-7 and the inner surface of clamp 1 3-2; an outer ring sleeve 1 3-3 is fitted on the stepped groove on the outer surface of clamp 1 3-2, and a retaining ring 1 3-5 is provided at the end of the stepped groove to prevent the outer ring sleeve 1 3-3 from coming off and falling off.

[0037] In this embodiment, the axial force generated by the internal pressure transmitted by bearing 3-9a and bearing 3-9b is transmitted to the main manifold structure through clamp 3-2; dust seal 3-8 and dust seal 3-10 are used to meet the dust prevention requirements of the slewing bearing; and main seal 3-6 is used to achieve high-pressure fluid sealing inside the pipe.

[0038] like Figure 4As shown, the second specific structure of the movable joint includes pipe connector 3 (4-1a), pipe connector 4 (4-1b), clamp 2 (4-2), outer ring sleeve 2 (4-3), retaining ring 2 (4-4), inner ring sleeve 4-5, seal 1 (4-6a), seal 2 (4-6b), and seal 3 (4-7). Among these, pipe connector 3 (4-1a) and pipe connector 4 (4-1b) are symmetrical structures facing each other left and right. The inner ring sleeve 4-5 is connected between the pipe ends of pipe connector 3 (4-1a) and pipe connector 4 (4-1b). Clamp 2 (4-6a) is fastened to the outer circumference of pipe connector 3 (4-1a), inner ring sleeve 4-5, and pipe connector 4 (4-1b). -2, Clamp 2 4-2 is also a two-part split structure, mainly bearing axial force; Seal 3 4-7 is installed on the contact surface between the inner ring 4-5 and clamp 2 4-2, Seal 1 4-6a is installed on the contact surface between pipe 3 4-1a and inner ring 4-5, and Seal 2 4-6b is installed on the contact surface between pipe 4-1b and inner ring 4-5; Outer ring 2 4-3 is fitted on the stepped groove on the outer surface of clamp 2 4-2, and a retaining ring 2 4-4 is provided at the end of the stepped groove to prevent the outer ring 2 4-3 from coming off and falling off.

[0039] In this embodiment, sealing of the high-pressure fluid inside the pipe is achieved by using seal 1 4-6a, seal 2 4-6b, and seal 3 4-7.

[0040] like Figure 6 and Figure 7 The diagram shows typical structural arrangements of two existing zipper-type fracturing equipment. The fracturing truck and manifold 6 generate high-pressure fracturing fluid, which is collected via a fracturing manifold skid and then connected to the so-called zipper device. The zipper device has multiple controllable output ports, each connected to one or more manifolds, which in turn connect to the working wellhead 7. The delivery of fracturing fluid to the working wellhead 7 is controlled independently by valves installed on the pipeline, thus achieving the requirement of delivering fracturing fluid to different working wellheads 7 at different stages and times.

[0041] like Figure 5 As shown, when the device of the present invention is used at the oil well site, the inlet end (front end) connects to the existing fracturing truck and manifold 6, and the outlet end (tail end quick connector 2-6) connects to the working wellhead 7, realizing rapid connection of the manifold, which is consistent with the above-mentioned... Figure 6 and Figure 7 Compared to other structures, the effect is obvious.

Claims

1. A quick-connect manifold device for fracturing, characterized in that: The system includes a carrier vehicle (1), on which a multi-degree-of-freedom manifold (2), a hoisting device (3), a power and control unit (4), and a balance adjustment beam (5) are respectively installed. The power and control unit (4) and the hoisting device (3) are both located in the empty space on one side of the multi-degree-of-freedom manifold (2), and the balance adjustment beam (5) is located in the empty space at the tail end of the multi-degree-of-freedom manifold (2). The power and control unit (4) is connected to the hoisting device (3) for driving. The hoisting device (3) then works in conjunction with the balance adjustment beam (5) to jointly drive the multi-degree-of-freedom manifold (2) to move to the wellhead position and connect with the wellhead. The structure of the multi-degree-of-freedom manifold (2) includes a base and an input head (2-4). The base and input head (2-4) are fixed on the carrier vehicle (1) as the base of the multi-degree-of-freedom manifold (2). The inlet end of the base and input head (2-4) is used to connect to the fracturing vehicle group. The outlet end of the base and input head (2-4) is equipped with a movable joint (2-1a). The movable joint (2-1a) is connected to the straight pipe short section (2-5a) and the elbow (2-3a) in sequence to form the first movable joint. A straight pipe section 2 (2-5b) is installed at the outlet end of elbow 1 (2-3a). Straight pipe section 2 (2-5b) is connected in sequence with movable joint 2 (2-1b) and elbow 2 (2-3b) to form the second movable joint. Straight pipe section 2 (2-5b) is equipped with a support rod (2-2). The outlet end of elbow 2 (2-3b) is equipped with straight pipe short section 3 (2-5c). Straight pipe short section 3 (2-5c) is connected in sequence with movable joint 3 (2-1c) and elbow 3 (2-3c) to form the third movable joint. The outlet end of elbow three (2-3c) is equipped with straight pipe short section four (2-5d). Straight pipe short section four (2-5d) is connected in sequence with movable joint four (2-1d) and elbow four (2-3d) to form the fourth movable joint. The outlet end of elbow four (2-3d) is equipped with movable joint five (2-1e). Movable joint five (2-1e) is connected in sequence with straight pipe short section five (2-5e) and tail end quick connector (2-6) to form the fifth movable joint. The structures of the above-mentioned movable joints 1 (2-1a), 2 (2-1b), 3 (2-1c), 4 (2-1d), and 5 (2-1e) are identical.

2. The quick-connect manifold device for fracturing according to claim 1, characterized in that: The first specific structure of the movable joint includes a first connector (3-1) and a second connector (3-7). An inner stop (3-4) is fitted on the external thread of the middle section of the first connector (3-1). The second connector (3-7) is fitted on the small end of the first connector (3-1). A clamp (3-2) is fastened together on the outer stepped end face of the second connector (3-7), the inner stop (3-4), and the inner side of the large end of the first connector (3-1). A bearing (3-9a) and a bearing (3-9b) are installed in the inner stop (3-4). The clamp (3-2) is a two-part split structure. The inner surface of the clamp (3-2) is fastened to the bearing (3-9a) and the bearing (3-9b). An outer ring (3-3) is fitted on the stepped groove on the outer surface of the clamp (3-2). A retaining ring (3-5) is provided at the end of the stepped groove.

3. The quick-connect manifold device for fracturing according to claim 2, characterized in that: Dustproof seal 1 (3-8) is installed on the contact surface between the inner surface of the first connecting pipe (3-1) and the inner surface of the first clamp (3-2), main seal (3-6) is installed on the contact surface between the second connecting pipe (3-7) and the first connecting pipe (3-1), and dustproof seal 2 (3-10) is installed on the contact surface between the second connecting pipe (3-7) and the inner surface of the first clamp (3-2).

4. The quick-connect manifold device for fracturing according to claim 1, characterized in that: The second specific structure of the movable joint includes a third connector (4-1a) and a fourth connector (4-1b). The third connector (4-1a) and the fourth connector (4-1b) are symmetrical structures facing each other from left to right. An inner ring sleeve (4-5) is connected between the ports of the third connector (4-1a) and the fourth connector (4-1b). A clamp second (4-2) is fastened together on the outer circumference of the third connector (4-1a), the inner ring sleeve (4-5), and the fourth connector (4-1b). The clamp second (4-2) is a two-part split structure. An outer ring sleeve second (4-3) is fitted on the stepped groove on the outer surface of the clamp second (4-2). A retaining ring second (4-4) is provided at the end of the stepped groove.

5. The quick-connect manifold device for fracturing according to claim 4, characterized in that: The inner ring sleeve (4-5) and the clamp two (4-2) are fitted with a seal three (4-7), the pipe three (4-1a) and the inner ring sleeve (4-5) are fitted with a seal one (4-6a), and the pipe four (4-1b) and the inner ring sleeve (4-5) are fitted with a seal two (4-6b).

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