CN209942753U

CN209942753U - Small-diameter large-drift-diameter petroleum pipe

Info

Publication number: CN209942753U
Application number: CN201920838197.4U
Authority: CN
Inventors: 李辉
Original assignee: Dongying Apusirui Petroleum Equipment Co Ltd
Current assignee: Dongying Apusirui Petroleum Equipment Co Ltd
Priority date: 2019-06-05
Filing date: 2019-06-05
Publication date: 2020-01-14
Anticipated expiration: 2029-06-05

Abstract

The utility model discloses a small-diameter large-drift-diameter petroleum pipe, wherein an oil pipe interface and an oil pipe joint are respectively arranged at two ends of the petroleum pipe, and the connecting diameter of the oil pipe interface and the oil pipe joint is consistent with the inner diameter and the outer diameter of the petroleum pipe; an internal thread is arranged on an oil pipe connector, an external thread is arranged on the oil pipe connector, guide surfaces are designed on the internal thread and the external thread, the internal thread and the external thread are both buttress threads, and the external thread is matched with the internal thread; the petroleum pipes are connected through the connecting structure by screw threads, so that the effects of coupling-free connection and uniformity of inner and outer diameters of the petroleum pipes are achieved. The utility model discloses not enough to the API connects, provide a UPS series major diameter petroleum pipe, solved the poor problem of current petroleum pipe size row not open, gas tightness and corrosivity, directly link the structure through designing special body, reach between the oil pipe and do not have the coupling and connect and the unanimous effect of petroleum pipe internal and external diameter, have huge economic value and extensive application prospect.

Description

Small-diameter large-drift-diameter petroleum pipe

Technical Field

The utility model relates to an oil field operation apparatus technical field, concretely relates to big latus rectum petroleum pipe of minor diameter.

Background

With the rapid development of the petroleum industry and the market demand, the connection mode of oil rods, oil pipes and other products used in the oil field operation process cannot meet the demand of modern operation production by the universal API standard or other industry standards at the present stage. According to the requirements of oil field drilling or other types of practical operation, the modern high-efficiency and high-quality implementation operation production can be met only by making special designs on oil rods, oil pipes and the like of the oil field drilling or other types of practical operation. Particularly, with the development of oil field development technology, branch wells, co-production and co-injection wells, horizontal wells and side wells are more and more, the conventional API series oil casings cannot meet the existing use requirements, and underground oil gas can reach the ground only through the oil casings in the development process of oil and gas fields. In particular, in small-bore wells, conventional oil casings with collars are not easily run into the designed bottom layer. Therefore, it is desirable to develop a small diameter, large diameter, high tensile oil casing.

Disclosure of Invention

To above technical defect, the utility model aims to provide a UPS series major diameter petroleum pipe to the not enough that API connects, solved current petroleum pipe size row not open, gas tightness and the poor problem of corrosion resistance, directly link the structure through designing special body, reach the effect that no coupling is connected and the petroleum pipe internal and external diameter is unanimous between the oil pipe.

In order to realize the purpose, the utility model discloses a technical scheme be:

the utility model provides a big latus rectum petroleum pipe of minor diameter, includes petroleum pipe, connection structure, its characterized in that: the two ends of the petroleum pipe are respectively provided with an oil pipe interface and an oil pipe joint, and the connecting diameter of the oil pipe interface and the oil pipe joint is consistent with the inner diameter and the outer diameter of the petroleum pipe; the connecting structure comprises a threaded connecting part and a metal shoulder sealing part, wherein the threaded connecting part comprises an internal thread and an external thread, the internal thread and the external thread are arranged on an oil pipe interface, the internal thread and the external thread are both provided with guide surfaces and are buttress threads, the external thread is matched with the internal thread, the metal shoulder sealing part comprises a main sealing surface of a shoulder arranged in 90 degrees of the oil pipe interface and an auxiliary sealing surface of the shoulder arranged in 90 degrees of the oil pipe interface, the petroleum pipes are connected through a connecting structure by screw threads, and the effects of connection without a coupling and consistency of the inner diameter and the outer diameter of the petroleum pipes are achieved.

Further, the tubing joint is tapered.

Further, the taper of the tapered oil pipe joint is 1: 16.

Furthermore, the tooth form angles on the two sides of the conical oil pipe joint are respectively +3 degrees and +10 degrees.

Furthermore, the length of the main sealing surface of the inner shoulder is 112 +/-0.05 mm, the length of the auxiliary sealing surface of the outer shoulder is 112-112.15 mm, the buckling position of the petroleum pipe is controlled by strictly controlling the sizes of the inner shoulder and the outer shoulder, and the deformation is controlled within the range of elastic deformation, so that the auxiliary sealing effect is ensured.

Further, the male and female threaded ports are both 5.75 x 65 ° chamfers.

Further, the depth of the internal thread is 50-70 mm from the end opening to the tail end of the tooth.

Further, the thread pitch is 5 or 8 threads/inch.

The utility model discloses the beneficial effect who creates lies in:

1. the small-diameter large-drift-diameter petroleum pipe of the utility model meets the requirements that the thread is not sticky and the sealing structure continues to be effective after the petroleum pipe is broken off for a plurality of times; the petroleum pipe is internally designed by adopting a advection line, so that the corrosion and the crevice corrosion of the joint part of the petroleum pipe can be prevented, the sealing is facilitated, and the deformation of the contact surface is uniform; the connecting diameter of the oil pipe connector and the oil pipe joint is consistent with the inner diameter and the outer diameter of the oil pipe, and the oil pipe is not obstructed when the oil pipe is put into a well; the inner thread and the outer thread are provided with guide surfaces, so that the threads are prevented from being damaged when being buckled; designing the inner and outer braking shoulder surfaces, and controlling the buckling operation by the positions; the internal and external threads are all full-top effective threads, and the connection strength is equivalent to that of the conventional coupling threads; the utility model discloses the parameter measurement is simple and convenient, and the simple operation easily masters, has huge economic value and extensive application prospect.

2. The utility model discloses the big latus rectum of minor diameter petroleum pipe passes through the setting of threaded connection part, makes can not have the coupling between the petroleum pipe and connects, ensures that the pipe inside and outside footpath is unanimous, reaches the minor diameter, the characteristics of big latus rectum.

3. The utility model discloses the large latus rectum petroleum pipe tensile strength of minor diameter is high, like the 64mm tubule, and the tensile reaches 45KN, is 3 times of foreign like product.

4. The utility model discloses the big latus rectum of minor diameter petroleum pipe passes through the setting of metal circular bead sealing part, is favorable to the sealing of coupling part, has good gas tightness, makes the connection between pipe and the pipe reach zonulae occludens's effect.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic diagram of the connection of two petroleum pipeline phases according to the present invention.

Part names and serial numbers in the drawings:

1-oil pipe joint, 2-oil pipe interface, 3-external thread, 4-internal thread, 5-external shoulder auxiliary sealing surface, 6-internal shoulder main sealing surface, 7-external thread port and 8-internal thread port.

Detailed Description

The following describes the petroleum pipe with small diameter and large drift diameter according to the present invention with reference to the accompanying drawings.

As shown in fig. 1 and 2, the oil pipe with small diameter and large drift diameter of the present invention has an oil pipe interface 2 and an oil pipe joint 1 at two ends of the oil pipe, and the connecting diameter of the oil pipe interface 2 and the oil pipe joint 1 is consistent with the inside and outside diameter of the oil pipe; an internal thread 4 is arranged on the oil pipe connector 2, an external thread 3 is arranged on the oil pipe connector 1, guide surfaces are designed on the internal thread 4 and the external thread 3, the guide surfaces are trapezoidal threads, and the external thread 3 is matched with the internal thread 4; the oil pipe connector 2 is provided with a 90-degree inner shoulder main sealing surface 6, and the oil pipe connector is provided with a 90-degree outer shoulder auxiliary sealing surface 5; the petroleum pipes are connected through the connecting structure by screw threads, so that the effects of coupling-free connection and uniformity of inner and outer diameters of the petroleum pipes are achieved.

The oil pipe joint 1 is conical, the conicity of the conical oil pipe joint 1 is 1:16, and the tooth form angles on the two sides of the conical oil pipe joint 1 are +3 degrees and +10 degrees respectively; the length of the main sealing surface of the inner shoulder is 112 +/-0.05 mm, and the length of the auxiliary sealing surface of the outer shoulder is 112-112.15 mm; the external thread port 7 and the internal thread port 8 are chamfers with the angle of 5.75 multiplied by 65 degrees; the depth of the internal thread 4 is 50-70 mm from the end opening to the tail end of the tooth; the pitch is 5 or 8 teeth/inch.

And is not limited thereto.

The working principle is as follows:

in the working process of the small-diameter large-drift-diameter petroleum pipe, the petroleum pipes are connected by adopting the screw thread, when the male thread of the screw thread is connected with the female thread, the threaded connection part is contacted at first, in the screwing process of the petroleum pipe, the main sealing surface 6 of the inner shoulder is also contacted to generate interference fit, the deformation is controlled within the elastic deformation range until the auxiliary sealing surface 5 of the outer shoulder is contacted to generate pre-pressure, when the threaded connection reaches a certain torque value, the sealing surfaces are also in interference fit, which is beneficial to the sealing of the connection part and has good air tightness, so that the connection between the petroleum pipes achieves the effects of no coupling connection, consistent inner and outer diameters of the petroleum pipes and no obstruction when the petroleum pipes are put into a well, simultaneously the utility model discloses high to tensile strength, the tensile reaches 45KN, is 3 times of foreign like product, and the parameter measurement is simple and convenient, and the simple operation easily masters, has huge economic value and extensive application prospect.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a big latus rectum petroleum pipe of minor diameter, includes petroleum pipe, connection structure, its characterized in that: the two ends of the petroleum pipe are respectively provided with an oil pipe interface and an oil pipe joint, and the connecting diameter of the oil pipe interface and the oil pipe joint is consistent with the inner diameter and the outer diameter of the petroleum pipe; the connecting structure comprises a threaded connecting part and a metal shoulder sealing part, wherein the threaded connecting part comprises an internal thread and an external thread, the internal thread and the external thread are arranged on an oil pipe interface, the internal thread and the external thread are both provided with guide surfaces and are buttress threads, the external thread is matched with the internal thread, the metal shoulder sealing part comprises a main sealing surface of a shoulder arranged in 90 degrees of the oil pipe interface and an auxiliary sealing surface of the shoulder arranged in 90 degrees of the oil pipe interface, the petroleum pipes are connected through a connecting structure by screw threads, and the effects of connection without a coupling and consistency of the inner diameter and the outer diameter of the petroleum pipes are achieved.

2. The small-diameter large-drift-diameter petroleum pipe according to claim 1, wherein: the tubing joint is tapered.

3. The small-diameter large-drift-diameter petroleum pipe according to claim 2, wherein: the taper of the tapered oil pipe joint is 1: 16.

4. The small-diameter large-drift-diameter petroleum pipe according to claim 2 or 3, wherein: the tooth form angles on the two sides of the conical oil pipe joint are +3 degrees and +10 degrees respectively.

5. The small-diameter large-drift-diameter petroleum pipe according to claim 1, wherein: the length of the inner shoulder main sealing surface is 112 +/-0.05 mm, and the length of the outer shoulder auxiliary sealing surface is 112-112.15 mm.

6. The small-diameter large-drift-diameter petroleum pipe according to claim 1, wherein: the external thread port and the internal thread port are chamfered by 5.75 multiplied by 65 degrees.

7. The small-diameter large-drift-diameter petroleum pipe according to claim 1, wherein: the depth of the internal thread is 50-70 mm from the end opening to the tail end of the tooth.

8. The small-diameter large-drift-diameter petroleum pipe according to claim 1, wherein: the thread pitch is 5 or 8 teeth/inch.