CN211649321U - Connecting pipeline between ultrahigh pressure fracturing manifold and wellhead device - Google Patents

Abstract

The utility model provides a coupling line between superhigh pressure fracturing manifold and wellhead assembly, includes coupling line and support frame: the connecting pipeline is an inclined pipeline and consists of two bent pipes, a long straight pipe and one or two short straight pipes, all the straight pipes and the bent pipes are formed by cutting and processing forged pieces, the inner diameters and the outer diameters of the straight pipes and the bent pipes are the same, and the straight pipes and the bent pipes are connected by end face flanges, sealing gasket rings and stud nuts; the support frames are supported at the flange connection part of the bent pipe and the short straight pipe and consist of an upper clamping ring, a lower clamping seat, a long stand column or a short stand column, a chassis, a round nut, a handle and a matched threaded connector, and the long stand column or the short stand column and the chassis are in threaded connection and can rotate and move up and down relative to the lower clamping seat and the chassis. In addition, the central angle alpha of the bending arc of the two bent pipes is between 30 and 60 degrees, and the commonly used central angle alpha is 45 degrees. Compared with the existing connecting pipeline, the connecting pipeline has the characteristics of light weight, small resistance, low energy consumption, long service life, good support and the like.

Description

Connecting pipeline between ultrahigh pressure fracturing manifold and wellhead device

Technical Field

The invention relates to a fracturing pipeline in petroleum machinery and oil-gas well fracturing exploitation equipment.

Background

The fracturing technology and equipment with the ultrahigh pressure of more than 100MPa are adopted to mine the oil and gas resources which are difficult to mine, and the method is an important direction for mining the oil and gas resources in China at present and in future. At present, in the ultrahigh pressure fracturing operation process, because the wall thickness of a fracturing fluid conveying pipeline is relatively thin and is difficult to reinforce by hard alloy materials, and parts such as a movable joint, a right-angle elbow and the like have poor adaptability to ultrahigh pressure fracturing fluid, the pipe explosion accident often occurs firstly in the fracturing operation process, and great economic loss is caused to a construction unit. In order to reduce the emergence of the pipe burst accident, the connecting line between most superhigh pressure fracturing manifold and the wellhead assembly now adopts the tee bend of square or cross-member and many straight tubes of cutting process after forging more, connects into the connecting line of two right angle turns with metal flange, seal backing ring and double-screw bolt nut, though can be obvious reduce the pipe burst accident, but has also brought two new problems: the pipeline with two right-angle turns has long flowing line and large flowing resistance, and increases much energy consumption; and secondly, a connecting pipeline consisting of square tee joints or four-way parts is extremely heavy, and does not have good supporting conditions, so that unbalanced heavy load is often brought to one side of the high-rise fracturing wellhead device, the service performance and the service life of the fracturing wellhead device are influenced, and certain safety risk exists. Therefore, it is necessary to optimally design the connecting pipeline between the ultrahigh pressure fracturing manifold and the wellhead device.

Disclosure of Invention

In view of the above problems, the present invention aims to provide a special connecting pipeline between a fracturing manifold and a wellhead device, which has the advantages of light weight, small resistance, low energy consumption, long service life and good support.

The invention comprises a connecting pipeline and a supporting frame; it is characterized in that: the connecting pipeline is an inclined pipeline and consists of two bent pipes, a long straight pipe and one or two short straight pipes, all the straight pipes and the bent pipes are formed by cutting and processing forged pieces, the inner diameters and the outer diameters of the straight pipes and the bent pipes are the same, and the straight pipes and the bent pipes are connected by end face flanges, sealing gasket rings and stud nuts; the support frame is supported at the flange connection part of the bent pipe and the short straight pipe and consists of an upper clamping ring, a lower clamping seat, a long upright post or a short upright post, a handle, a round nut, a chassis and a matched threaded connector, and the long upright post or the short upright post and the chassis are in threaded connection and can rotate and move up and down relative to the lower clamping seat and the chassis.

Because the inclined connecting pipelines with the same diameter are adopted, compared with the connecting pipelines with two right-angle turns, the flow performance of the fracturing fluid can be greatly improved, and unnecessary energy consumption can be reduced; meanwhile, the weight of the pipeline can be greatly reduced, steel can be saved, and the supporting condition is improved. The connecting pipeline of the invention is completely machined by adopting a forged piece, and is connected by using an end face flange, a sealing gasket ring and a stud nut; compared with the fracturing pipeline formed by connecting the movable joint, the right-angle bent pipe and the straight pipe, the fracturing fluid has the advantages that the fluidity of the fracturing fluid is obviously improved, the wear resistance, corrosion resistance and explosion resistance of the pipeline and a sealing element are improved, and the service life of the pipeline can be effectively prolonged. The support frames are all supported at the flange joint of the bent pipe and the short straight pipe, so that the pipeline can be prevented from deforming under stress; the support frame consists of an upper clamping ring, a lower clamping seat, a long upright post or a short upright post, a handle, a round nut, a chassis and a matched threaded connecting piece, not only shows the characteristics of the support frame, but also improves the universality of parts; the long upright post or the short upright post in the support frame is in threaded connection with the chassis and can rotate and move up and down relative to the lower clamping seat and the chassis, so that the pipeline can be effectively supported in the installation and use processes, and unbalanced heavy load on one side of the wellhead device connected by the pipeline is prevented.

Drawings

FIG. 1 is a schematic diagram of the general structure of an embodiment of the present invention using two supports;

fig. 2 is a schematic view of the general structure of an embodiment of the present invention using a support frame.

The part names indicated by reference numerals in the drawings are as follows:

1. the anti-skid device comprises a short straight pipe, 2, a bent pipe, 3, a long straight pipe, 4, a sealing gasket ring, 5, a stud nut, 6, an upper clamping ring, 7, a bolt nut, 8, a lower clamping seat, 9, an anti-skid screw, 10, a long upright post, 11, a handle, 12, a round nut, 13, a chassis, 14, an expansion pipe bolt, 15 and a short upright post.

Detailed Description

The invention will be further described with reference to the accompanying drawings in which:

the invention is formed by combining two main parts, namely a connecting pipeline and a support frame. The main body of the connecting pipeline is designed into an inclined pipeline and consists of two bent pipes 2, a long straight pipe 3 and one or two short straight pipes 1, wherein the inner diameters and the outer diameters of all the bent pipes and the straight pipes are the same and are connected by end face flanges, sealing gasket rings 4 and stud nuts 5; therefore, the adverse conditions such as diameter change, dislocation, sharp bend and the like do not exist in the pipeline, so that the service life can be kept longer under the action of the ultrahigh-pressure fracturing fluid. All the straight pipes and the bent pipes of the connecting pipeline are formed by adopting the cutting processing or the heating bending of a forging piece, so that the comprehensive mechanical property of the material is improved, and the service life of parts is prolonged.

The two bent pipes 2 are the same parts, the central angle alpha of the bent arc is between 30 and 60 degrees, and the most common central angle alpha is 45 degrees so as to pursue the best effect. The lengths of the long straight pipe 3 and the short straight pipe 1 can be designed according to the specific conditions of equipment used by customers or can be subjected to standardized and serialized design so as to adapt to the change of the relative position between the fracturing manifold and a wellhead device.

The support frame part comprises an upper clamping ring 6, a lower clamping seat 8, a long upright post 10 or a short upright post 15, a handle 11, a round nut 12, a chassis 13 and matched threaded connecting pieces, the number of the support frame part is two or one, and the support frame part is fixedly supported at the flange connecting part of the two bent pipes 2 and the short straight pipe 1 by the upper clamping ring 6, the bolt nut 7 and the lower clamping seat 8 respectively. FIG. 1 is an embodiment of the present invention using two support frame sections, the number of which is two, the height of which is divided by the height of the long upright 10, the short upright 15, and the other parts are the same and common; fig. 2 is an embodiment of the present invention using a support frame component, when the number of the support frame component is one, a short straight pipe 1 and a short support frame are omitted, an elbow pipe 2 below a connecting pipeline is directly butted with a valve or a fracturing head on a fracturing manifold, and a support component on a fracturing manifold base is used for supporting the connecting part. The long upright post 10 and the short upright post 15 are both thick-wall steel pipes, the upper ends of the long upright post and the short upright post are both cut with an annular groove, and after being respectively connected with the sleeves at the lower ends of the two lower clamping seats 8, the long upright post and the short upright post are inserted into the annular groove by using an anti-skid screw 9 to prevent the long upright post and the short upright; the long upright post 10 and the short upright post 15 are both welded with a handle 11 which is distributed in a cross shape, and the lower ends of the handle are connected with a round nut 12 and a chassis 13 by screw threads; under the action of the handle 11, the long upright post 10 or the short upright post 15 can rotate and move up and down relative to the lower clamping seat 8 and the chassis 13, so that the supporting clearance and elasticity are eliminated, upward supporting force is generated, the gravity of the pipeline is offset, and effective support is formed.

The chassis 13 is formed by steel castings or welded parts to prevent breakage under the heavy pressure of the pipeline and the fracturing fluid; after the round nut 12 and the chassis 13 are mutually fastened, the loosening of the threaded connection part can be prevented; after the chassis 13 is fixed with the cement ground by four uniformly distributed expansion pipe bolts 14, the displacement generated when the chassis is collided by external force can be prevented.

Claims (6)

1. The utility model provides a coupling line between superhigh pressure fracturing manifold and wellhead assembly, includes connecting tube and support frame, characterized by: the connecting pipeline is an inclined pipeline and consists of two bent pipes, a long straight pipe and one or two short straight pipes, all the straight pipes and the bent pipes are formed by cutting and processing forged pieces, the inner diameters and the outer diameters of the straight pipes and the bent pipes are the same, and the straight pipes and the bent pipes are connected by end face flanges, sealing gasket rings and stud nuts; the support frame is supported at the flange connection part of the bent pipe and the short straight pipe and consists of an upper clamping ring, a lower clamping seat, a long upright post or a short upright post, a handle, a round nut, a chassis and a matched threaded connector, and the long upright post or the short upright post and the chassis are in threaded connection and can rotate and move up and down relative to the lower clamping seat and the chassis.

2. A coupling line between an ultra high pressure fracturing manifold and a wellhead as claimed in claim 1 wherein: the two bent pipes are the same parts, the central angle alpha of the bent arc is between 30 and 60 degrees, and the most common central angle alpha is 45 degrees.

3. A coupling line between an ultra high pressure fracturing manifold and a wellhead as claimed in claim 1 wherein: the number of the support frame parts is two, the height of the support frame parts is divided, the height of the support frame parts is matched with the length of the upright post parts, the length of the support frame parts is matched with the length of the upright post parts, the short support frame parts are matched with the short upright post parts, and other parts are identical and universal.

4. A coupling line between an ultra high pressure fracturing manifold and a wellhead as claimed in claim 1 wherein: when the number of the support frame parts is one, a short straight pipe and a short support frame are omitted, the bent pipe below the connecting pipeline is directly butted with the valve or the fracturing head on the fracturing manifold, and the connecting part of the bent pipe and the valve or the fracturing head is supported by the support part on the fracturing manifold base.

5. A coupling line between an ultra high pressure fracturing manifold and a wellhead as claimed in claim 1 wherein: the long upright post and the short upright post are thick-wall steel pipes, the upper ends of the long upright post and the short upright post are both cut with an annular groove, and after the long upright post and the short upright post are respectively connected with the sleeves at the lower ends of the two lower clamping seats, the long upright post and the short upright post are inserted into the annular groove by using anti-skid screws to prevent the.

6. A coupling line between an ultra high pressure fracturing manifold and a wellhead as claimed in claim 1 wherein: the long upright post and the short upright post are welded with cross-shaped handles.

Images