CN207553985U - A kind of ultrahigh-pressure vibration damping pressure break Universal pipe tandem head - Google Patents

Abstract

The utility model relates to a universal manifold joint for ultra-high pressure vibration reduction and fracturing, which belongs to the technical field of oil and gas hydraulic fracturing equipment components. It consists of a shell, a compression spring, a left convex taper plug, a right convex taper plug, a left concave-convex pipe joint and a right concave-convex pipe joint. One side of the housing is equipped with a left concave-convex pipe joint, and the other side is equipped with a right concave-convex pipe joint. One ends of the left concave-convex pipe joint and the right concave-convex pipe joint respectively extend to the outer end of the casing. The combination of rubber soft seal and metal hard seal is adopted between the concave and convex pipe joints of the manifold joint and the shell, which can make the greater the hydraulic pressure, the greater the sealing force and the better the sealing effect during work; at the same time, it can absorb space Vibration in any direction can achieve better vibration isolation effect. The joint adopts double-pipe joints or multi-pipe joints in series, which can realize the connection of high-pressure pipes on different planes in space within a certain angle range, and reduce the difficulty of on-site installation of fracturing manifolds.

Description

A universal manifold joint for ultra-high pressure vibration-damping fracturing

technical field

The utility model relates to a universal manifold joint for ultra-high pressure vibration reduction and fracturing, which belongs to the technical field of oil and gas hydraulic fracturing equipment components.

Background technique

Hydraulic fracturing is one of the main means of improving oil and gas reservoirs and increasing and stabilizing production. With the development of unconventional energy sources such as low-permeability oil and gas, tight oil, and shale gas, and the improvement of hydraulic fracturing technology, hydraulic fracturing equipment is increasingly Develop in the direction of ultra-high pressure, large displacement, and high reliability. The scale of hydraulic fracturing in shale gas well groups is relatively large, and there have even been operations of "thousands of squares of sand and thousands of squares of liquid". The entire fracturing process requires multiple fracturing pump trucks and sand mixing trucks to mix and pressurize the fracturing fluid at the same time, and then collect and transport the fracturing fluid into the well through multiple high-pressure pipelines.

At present, the high-pressure discharge manifold is usually composed of high-pressure manifold parts such as discharge flanges, swivel elbows, and straight pipe assemblies. The union form is directly connected to the ground high-pressure manifold skid. During the long-term fracturing operation of the existing high-pressure discharge manifold, fatigue cracks are likely to occur at the structural mutation and stress concentration, resulting in flange connection failure, pipe wall puncture and leakage. issues such as bursting. The main reasons are as follows: first, the fracturing pump on the fracturing truck is a reciprocating pump, and there is a certain flow pulsation; second, the structure of the entire high-pressure manifold is complex, and the displacement and pressure are not balanced; third, the fracturing pump The vibration generated by the engine and fracturing pump on the vehicle will also be transmitted to the high-pressure manifold through rigid connections such as flanges, unions or threads. Therefore, the entire fracturing high-pressure manifold system often experiences abnormal vibration under complex excitation, resulting in short service life and low reliability of the fracturing high-pressure discharge manifold.

Contents of the invention

The purpose of the utility model is to provide an ultra-high pressure vibration-reducing fracturing universal manifold joint that can effectively reduce the adverse effects of vibration on the high-pressure manifold, increase the service life of the manifold, and ensure the smooth operation of the high-pressure manifold.

The technical scheme of the utility model is:

An ultra-high pressure vibration-damping fracturing universal manifold joint, which is composed of a shell, a compression spring, a left convex taper plug, a right convex taper plug, a left concave-convex pipe joint, and a right concave-convex pipe joint. A left concave-convex pipe joint is installed on one side through the left convex cone plug, and a right concave-convex pipe joint is installed on the other side of the shell through the right convex cone plug. A compression spring is arranged between the left convex cone plug and the right convex cone plug. The left concave-convex pipe joint and one end of the right concave-convex pipe joint respectively extend to the outer end of the housing.

The left concave-convex pipe joint and the right concave-convex pipe joint are in sliding and sealed connection with the housing.

The left concave-convex pipe joint and the right concave-convex pipe joint are cylindrical bodies respectively, and the two ends of the left concave-convex pipe joint and the right concave-convex pipe joint are respectively provided with spherical flanges.

The spherical flange is trumpet-shaped.

A rubber sealing ring is provided between the left concave-convex pipe joint and the right concave-convex pipe joint and the housing, and a semicircular steel ring is arranged between the left concave-convex pipe joint and the right concave-convex pipe joint on one side of the rubber sealing ring and the housing. ring, month-shaped sealing steel ring and O-ring.

The casing is composed of a left casing and a right casing, a sealing steel ring is arranged between the left casing and the right casing, and the left casing and the right casing are connected and fixed by fixing bolts.

The beneficial effects of the utility model are:

When the ultra-high pressure vibration-damping fracturing universal manifold joint is working, it can be installed with a single universal manifold joint or a double universal manifold joint, so that the manifold can be connected in any space within a certain range, and the installation of the fracturing manifold becomes easier. Simple and convenient; the combination of rubber soft seal and metal hard seal is adopted between the concave-convex pipe joint and the shell, so that the greater the hydraulic pressure when working, the greater the sealing force and the better the sealing effect; at the same time, it can absorb any space Direction of vibration to achieve better vibration isolation effect. The ultra-high pressure vibration-damping fracturing universal manifold joint adopts a double-pipe joint or multi-pipe joint in series, which can realize the connection of high-pressure pipes with different planes in space within a certain angle range, and reduce the difficulty of on-site installation of the fracturing manifold.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Figure 2 is an enlarged view of the structure at A in Figure 1;

Figure 3 is a schematic diagram of installation of the utility model.

In the figure: 1, compression spring, 2, left convex cone plug, 3, right convex cone plug, 4, left concave-convex pipe joint, 5, right concave-convex pipe joint, 6, left shell, 7, right shell, 8, Sealing steel ring, 9, fixing bolt, 10, rubber sealing ring, 11, semicircular steel ring, 12, moon-shaped sealing steel ring, 13, O-shaped sealing ring.

Detailed ways

The ultra-high pressure vibration-damping fracturing universal manifold joint is composed of a shell, a compression spring 1, a left convex cone plug 2, a right convex cone plug 3, a left concave-convex pipe joint 4 and a right concave-convex pipe joint 5. body 6 and right housing 7, the left housing 6 and the right housing 7 are respectively provided with annular sealing grooves on the corresponding end faces, and a sealing steel ring 8 is installed in the annular sealing grooves, between the left housing 6 and the right housing 7 Connect and fix by fixing bolt 9; To realize the metal hard seal between the left casing 6 and the right casing 7.

One side of the housing is equipped with a left concave-convex pipe joint 4 through the left convex cone plug 2, and the other side of the housing is equipped with a right concave-convex pipe joint 5 through the right convex cone plug 3. The left concave-convex pipe joint 4 and the right concave-convex pipe joint 5 are cylindrical bodies respectively, and the two ends of the left concave-convex pipe joint 4 and the right concave-convex pipe joint 5 are respectively provided with horn-shaped spherical flanges, and the left concave-convex pipe joint 4 and The spherical flange of the right concave-convex pipe joint 5 is consistent with the spherical surface size of the housing, and the left concave-convex pipe joint 4 and the right concave-convex pipe joint are respectively connected to the housing by sliding and sealing the horn-shaped spherical flanges. The concave-convex pipe joint can swing and rotate relative to the housing within a certain spatial angle range. A compression spring 1 is arranged between the left convex taper plug 2 and the right convex taper plug 3, and one end of the left concave-convex pipe joint 4 and the right concave-convex pipe joint 5 respectively extends to the outer end of the housing.

A rubber sealing ring 10 is arranged between the trumpet-shaped spherical flange of the left concave-convex pipe joint and the right concave-convex pipe joint and the housing, and the left concave-convex pipe joint 4 on one side of the rubber sealing ring 10 and the right concave-convex pipe joint 5 are connected to the housing. A semicircular steel ring 11, a moon-shaped sealing steel ring 12 and an O-shaped sealing ring 13 are arranged in sequence in between. The rubber seal ring 10 and the O-ring seal 13 can realize the low-pressure soft seal between the concave-convex pipe joint and the housing under the action of the liquid pressure in the inner cavity.

Under the combined action of the preload of the compression spring 1 and the liquid pressure in the inner cavity, the moon-shaped sealing steel ring 12 can realize the line contact hard sealing of low pressure, high pressure and ultra-high pressure.

The material hardness of the moon-shaped sealing steel ring 12 of the manifold joint is lower than that of the shell and the concave-convex pipe joint. Under the action of internal pressure and contact force, elastic-plastic deformation can occur, so that the sealing surface is closely fitted. The greater the liquid pressure, the tighter the seal. The better the effect. The semicircular steel ring 11 is in contact with the rubber sealing ring 10 and the moon-shaped sealing steel ring 12 respectively, and plays the role of support and force transmission.

The manifold joint is installed with a single universal manifold joint or a double universal manifold joint, which enables the manifold to be connected in any space within a certain range, and the installation of the fracturing manifold becomes simple and convenient; it can isolate a small area in any direction vibration. If multiple pipe joints are used in series, the universal connection of fracturing pipelines with different planes in space within a certain angle range can be realized, and small vibrations in any direction of the fracturing manifold space can be isolated, and the vibration damping effect is better, which can effectively reduce the impact of vibration on Manifold influence, improve the reliability of fracturing manifold.

Claims (6)

1. a kind of ultrahigh-pressure vibration damping pressure break Universal pipe tandem head, it is by housing, compressed spring（1）, left convex cone plug（2）, right convex cone Plug（3）, left concave-convex pipe fitting（4）With right concave-convex pipe fitting（5）It forms, it is characterised in that：Side passes through left convex cone plug in housing （2）Left concave-convex pipe fitting is installed（4）, opposite side passes through right convex cone plug in housing（3）Right concave-convex pipe fitting is installed（5）, it is left Convex cone plug（2）With right convex cone plug（3）Between be provided with compressed spring（1）, left bumps pipe fitting（4）With right concave-convex pipe fitting（5） One end extend respectively to housing outer end.

2. a kind of ultrahigh-pressure vibration damping pressure break Universal pipe tandem head according to claim 1, it is characterised in that：The left side is recessed Convex pipe fitting（4）With right concave-convex pipe fitting（5）It is slidably and sealingly connected between housing.

3. a kind of ultrahigh-pressure vibration damping pressure break Universal pipe tandem head according to claim 1, it is characterised in that：The left side is recessed Convex pipe fitting（4）With right concave-convex pipe fitting（5）Respectively cylindrical body, left bumps pipe fitting（4）With right concave-convex pipe fitting（5）Two End end is respectively arranged with spherical surface flange.

4. a kind of ultrahigh-pressure vibration damping pressure break Universal pipe tandem head according to claim 3, it is characterised in that：The spherical surface Flange is in horn-like.

5. a kind of ultrahigh-pressure vibration damping pressure break Universal pipe tandem head according to claim 3, it is characterised in that：The left side is recessed Convex pipe fitting（4）With right concave-convex pipe fitting（5）Rubber seal is provided between housing（10）, rubber seal（10）Side Left concave-convex pipe fitting（4）With right concave-convex pipe fitting（5）Semicircle steel ring is disposed between housing（11）, the moon type sealing Steel ring（12）And O-ring seal（13）.

6. a kind of ultrahigh-pressure vibration damping pressure break Universal pipe tandem head according to claim 1, it is characterised in that：The housing By left shell（6）And right shell body（7）It forms, left shell（6）And right shell body（7）Between be provided with ring gasket（8）, left shell （6）And right shell body（7）Between pass through fixing bolt（9）Connection is fixed.