CN220828618U - Novel oil pipe connection structure - Google Patents

Abstract

The utility model relates to the technical field of oil pipe threaded connection and discloses a novel oil pipe connection structure, which comprises a female connector, wherein a female connector through hole is communicated with the bottom of the female connector, trapezoidal threads are formed on the left side and the right side of the bottom of the female connector, male connectors are connected with the bottoms of a plurality of trapezoidal threads in a threaded manner, joint metal sealing surfaces are fixedly connected on the left side and the right side of the bottom of the female connector, the female connector is flush with the female connector through hole, and the trapezoidal threads adopt hook-type improved buttress threads. According to the utility model, the connection performance and strength can be improved through the matching among the female connector, the male connector, the female connector through hole and the trapezoidal threads, so that the requirements of customers can be met, and the vortex generation and the anti-sticking capability can be improved through the matching among the female connector, the female connector through hole and the connector metal sealing hole, so that the working requirements of well completion operation can be met.

Description

Novel oil pipe connection structure

Technical Field

The utility model relates to the technical field of oil pipe threaded connection, in particular to a novel oil pipe connection structure.

Background

The oil pipe is a pipeline used in the oil and natural gas industry and used for conveying liquid or gas, a plurality of sections of pipelines are required to be connected in industrial production, and a novel oil pipe connecting structure is required to be used when a plurality of sections of oil pipes are connected.

Through retrieval, chinese patent publication number is: CN202266200U discloses an oil pipe threaded connection structure, including the oil pipe end, the oil pipe end with the screw thread that the coupling adopted is circular cone screw thread, the head of oil pipe end is provided with outer moment of torsion step, be provided with on the coupling with this outer moment of torsion step complex interior moment of torsion step. The screw thread connection strength is high; the sealing performance is good; the buckling is easy, and the cross buckling is not easy; the anti-sticking performance is good; the anti-overtorque capacity is strong; after the button is fastened, the stress of the connecting part is low; the straight transition of connecting position hole can make the fluid flow rate stable when passing through in the tubular column, avoids producing vortex scour phenomenon to connecting position, but the device in the in-service use oil pipe has low in processing cost, simple process's advantage, but also leads to its tensile strength low and screwed joint to take place the thread gluing easily to become invalid, makes its practical use in have the limitation to can not customer's user demand.

Disclosure of Invention

In order to achieve the above purpose, the present utility model adopts the following technical scheme: novel oil pipe connection structure, including female joint, its characterized in that: the bottom intercommunication of female joint has female joint through-hole, trapezoidal screw thread has all been seted up to the bottom left and right sides of female joint, and a plurality of the equal threaded connection in bottom of trapezoidal screw thread has the male joint, the bottom left and right sides of female joint all fixedly connected with connects the metal seal face.

Specifically, the trapezoidal threads are adopted, so that the connection performance and strength of the male connector can be improved, and the internal pressure resistance strength of the male connector and the female connector can be improved.

As a further description of the above technical solution:

the female connector is flush with the female connector through hole.

In particular, it is possible to provide a good sealing effect for the device and to avoid or reduce the occurrence of eddy currents.

As a further description of the above technical solution:

the joint metal sealing surface adopts a 30-degree sealing and minus 15-degree torque shoulder design.

In particular, sufficient thickness, angle and length fit may be ensured.

As a further description of the above technical solution:

The joint metal sealing surface has the same structure shape and is provided with multiple sealing structures.

In particular, the sealing performance can be ensured.

As a further description of the above technical solution:

The trapezoidal thread adopts hook type improved buttress thread.

In particular, the anti-galling ability of the threads can be improved.

As a further description of the above technical solution:

The maximum bending of the female joint can reach 30 DEG/30 m.

In particular, it resists compression, bending and torque when subjected to composite loads.

As a further description of the above technical solution:

the trapezoidal threads take the form 2 7/8 "8 teeth/inch and 3 1/2" -4 1/2"6 teeth/inch.

In particular, it is possible to avoid or to reduce the occurrence of eddy currents while ensuring sealing.

The utility model has the following beneficial effects:

1. According to the utility model, through the matching among the female connector, the male connector, the female connector through hole and the trapezoidal threads, the connection performance and strength between the male connector and the female connector can be improved, and the probability of accidents caused by failure of the threaded connector of the common threads can be reduced, so that the requirements of customers can be met.

2. According to the utility model, through the matching among the female joint, the female joint through hole and the joint metal sealing hole, vortex generation or less vortex generation can be avoided, and the anti-sticking capacity of threads is improved, so that the working requirements of well completion operation can be met.

Drawings

FIG. 1 is a perspective view of a novel oil pipe connection structure according to the present utility model;

FIG. 2 is a front view of a novel tubing connection structure according to the present utility model;

Fig. 3 is a schematic cross-sectional view of a novel oil pipe connection structure according to the present utility model.

Legend description:

1. A female joint; 2. a male connector; 3. a female connector through hole; 4. trapezoidal threads; 5. and (3) a joint metal sealing surface.

Description of the embodiments

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 and 3, one embodiment provided by the present utility model: the novel oil pipe connecting structure comprises a female connector 1, wherein a female connector through hole 3 is communicated with the bottom of the female connector 1, trapezoidal threads 4 are formed on the left side and the right side of the bottom of the female connector 1, male connectors 2 are connected with the bottoms of the trapezoidal threads 4 in a threaded mode, and joint metal sealing surfaces 5 are fixedly connected with the left side and the right side of the bottom of the female connector 1; the female connector 1 is flush with the female connector through hole 3; the joint metal sealing surface 5 adopts a design of 30-degree sealing and a negative 15-degree torque shoulder;

In particular, a good sealing effect is achieved, and the generation of vortex or less generation of vortex can be avoided.

Referring to fig. 1 and 2, the joint metal seal face 5 is identical in structural shape and provided with a multiple seal structure; the trapezoidal thread 4 adopts hook-type improved buttress thread;

Specifically, the anti-sticking capacity of the threads is improved, and the tightness can be ensured under bearing composite load.

Referring to fig. 2 and 3, the maximum bending of the female joint 1 can reach 30 °/30m; trapezoidal thread 4 takes the form 2 7/8 "8 threads/inch and 3 1/2" -4 1/2"6 threads/inch;

Specifically, the sealing property can be ensured while ensuring a sufficient thickness, a proper angle and length. The sealing effect is ensured to be good under the composite load of bending, high temperature and the like.

Working principle: before the device is used, the device firstly replaces the original common API threaded oil pipe by the high-performance threaded oil pipe, the API threaded oil pipe has low processing cost and simple process, but has low tensile strength, the threaded joint is easy to generate thread gluing failure, a sealing surface which is contacted with the female joint through hole 3 is formed on two sides of a joint metal contact surface 5 by the female joint through hole 3, and the male joint 2 is tightly connected with the female joint 1 by threads, so that the joint connection performance of the device is higher than that of the API threaded oil pipe, the probability of accidents caused by the failure of the API common threads due to the thread joint is reduced, thereby meeting the requirements of users, and after the trapezoidal threads 4 of the device are tightly connected with the female joint 1 by adopting hook-type improved buttress threads, the inner wall of the female joint 1 is flush with the female joint through hole 3, so that the device has good sealing effect and improves the thread gluing resistance, and meets the well completion operation requirements of an oilfield site.

Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present utility model, and although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present utility model.

Claims (7)

1. Novel oil pipe connection structure, including female joint (1), its characterized in that: the bottom intercommunication of female joint (1) has female joint through-hole (3), trapezoidal screw thread (4) have all been seted up to the bottom left and right sides of female joint (1), a plurality of the equal threaded connection in bottom of trapezoidal screw thread (4) has male joint (2), the bottom left and right sides of female joint (1) all fixedly connected with connects metal seal face (5).

2. The novel oil pipe connection structure according to claim 1, wherein: the female connector (1) is flush with the female connector through hole (3).

3. The novel oil pipe connection structure according to claim 1, wherein: the joint metal sealing surface (5) adopts a 30-degree sealing and negative 15-degree torque shoulder design.

4. The novel oil pipe connection structure according to claim 1, wherein: the joint metal sealing surface (5) has the same structural shape and is provided with a multiple sealing structure.

5. The novel oil pipe connection structure according to claim 2, wherein: the trapezoidal thread (4) adopts a hook type improved buttress thread.

6. The novel oil pipe connection structure according to claim 1, wherein: the maximum curvature of the female joint (1) can reach 30 DEG/30 m.

7. The novel oil pipe connection structure according to claim 1, wherein: the trapezoidal thread (4) takes the form 2 7/8 "8 teeth/inch and 3 1/2" -4 1/2"6 teeth/inch.