CN215485894U

CN215485894U - Flowing short joint

Info

Publication number: CN215485894U
Application number: CN202121000049.9U
Authority: CN
Inventors: 杨斌; 张晶; 吴方益; 廖程; 陈科; 任俊松; 范伟; 杨庆辉; 蒋敏; 平德权
Original assignee: Sinopec Oilfield Service Corp; Sinopec Southwest Petroleum Engineering Co Ltd Downhole Operation Branch
Current assignee: Sinopec Oilfield Service Corp; Sinopec Southwest Petroleum Engineering Co Ltd Downhole Operation Branch
Priority date: 2021-05-11
Filing date: 2021-05-11
Publication date: 2022-01-11
Anticipated expiration: 2031-05-11

Abstract

The utility model discloses a flowing short section, which comprises a shell and a core pipe, wherein the shell is provided with a first end and a second end; the shell is of a segmented structure, and two adjacent segments of shells are butted together through a detachable structure; the inner wall of the shell is provided with grooves which extend along the circumferential direction of the inner wall of the shell and are connected end to end, and the width of each groove at least spans two adjacent sections of the shells; the core pipe is detachably sleeved in a cylindrical accommodating space formed by the enclosing of the groove, and the end surfaces of the two sections of the core pipe face to the two side walls of the groove respectively. The problem that the inner wall corrosion condition is not easy to check and the cost is increased due to the integral replacement in the prior art can be solved.

Description

Flowing short joint

Technical Field

The utility model relates to the field of throttling systems, in particular to a flowing short joint which is particularly suitable for an anti-erosion high-pressure throttling system.

Background

The flow nipple can be used for ground flowback test throttling and pressure control operation of ultrahigh pressure oil and gas wells, large-scale sand adding fracturing shale gas wells and large-scale acidizing marine phase gas wells. The short section is made of wear-resistant materials and used for protecting a fluid turbulence part in a ground flow to avoid flow erosion.

The existing flowing short section is of an integral structure, and the inside of the flowing short section is made of alloy materials. However, the integral flow nipple can only be replaced integrally once the inner wall is corroded, and the corrosion of the inner wall is not convenient to check in daily use.

To this end, it is desirable to seek a solution that at least alleviates the above problems.

Disclosure of Invention

The utility model aims to provide a flow nipple which is convenient for checking and replacing a core tube.

The technical scheme of the utility model for realizing the purpose is as follows:

a flow nipple comprises a shell and a core pipe; the shell is of a segmented structure, and two adjacent segments of shells are butted together through a detachable structure; the inner wall of the shell is provided with grooves which extend along the circumferential direction of the inner wall of the shell and are connected end to end, and the width of each groove at least spans two adjacent sections of the shells; the core pipe is detachably sleeved in a cylindrical accommodating space formed by the enclosing of the groove, and the end surfaces of the two sections of the core pipe face to the two side walls of the groove respectively.

The detachable structure comprises a first flange arranged at the end, opposite to the butt joint end, of one of the two adjacent sections of shells, a second flange arranged at the other of the two adjacent sections of shells and used for being connected with the first flange, and bolts for tightly connecting the first flange and the second flange.

And a sealing ring is arranged between the end surfaces of the opposite butt joint ends of the two adjacent sections of shells.

The end surfaces of the two ends of the core pipe are respectively in close contact fit with the two side walls of the groove.

The inner diameter of the core pipe is equal to that of the shell, and the axis of the core pipe is overlapped with that of the shell.

The housing is divided into two sections.

The utility model has the following beneficial technical effects:

the shell of the utility model is of a segmented structure, two adjacent sections of shells are butted together through a detachable structure, the inner wall of the shell is provided with grooves which extend along the circumferential direction of the inner wall of the shell and are connected end to end, the width of the groove at least spans two adjacent sections of the shells, the core pipe is detachably sleeved in a cylindrical accommodating space which is formed by enclosing the grooves, and the end surfaces of two ends of the core pipe face to two side walls of the groove respectively. The sectional structure can disassemble two adjacent sections of shells, is convenient for the inspection and the replacement of the core pipe sleeved in the shell, and can avoid the problems that the inner wall corrosion condition is not easy to inspect and the cost is increased due to the integral type in the prior art.

Drawings

Fig. 1 is a schematic view of the structure taken along the axial direction of the present invention.

Fig. 2 is a schematic view of the housing of the present invention taken along its axis.

Detailed Description

The following examples are given to illustrate the present invention and it is necessary to point out here that the following examples are given only for the purpose of further illustration of the utility model and are not to be construed as limiting the scope of the utility model.

The descriptions in this specification relating to "first", "second", "third", "fourth", "fifth", "sixth", "seventh", etc., are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, features defined as "first", "second", "third", "fourth", "fifth", "sixth", "seventh" may explicitly or implicitly include at least one such feature.

FIG. 1 illustrates an embodiment of a flow sub among many embodiments of the present invention. The flow nipple comprises a shell 1 and a core pipe 2.

Referring to fig. 2, the housing 1 includes a passage 11 extending through opposite ends, the passage 11 allowing fluid to flow therethrough. The housing 1 is a segmented structure, and in the embodiment shown in fig. 1, the housing 1 includes two sections of shells, wherein one section is a first shell 12, and the other section is a second shell 13, and the two sections of shells are butted together, and specifically, the two adjacent sections of shells are butted together through a detachable structure. The inner wall of the shell 1 is provided with grooves 14 which extend along the circumferential direction of the inner wall of the shell and are connected end to end, the width of each groove 14 spans the two adjacent shells, and the grooves 14 enclose to form a cylindrical accommodating space.

The core tube 2 is a cylindrical structure, and is detachably sleeved in the accommodating space enclosed by the groove 14 to form a cylinder, the end surfaces of the two ends of the core tube respectively face the two side walls of the groove 14, for example, the core tube 2 is movably matched with the groove 14 in a matching manner, and the core tube 2 is used for preventing the fluid from corroding the inner wall of the shell 1. The side wall of the groove 14 limits the core tube 2, and limits the core tube 2 to move out of the channel 11 along the axial direction of the shell 1, thereby playing a role in reliably preventing the fluid from puncturing the inner wall of the shell 1. The end surfaces of the two ends of the core tube 2 are preferably in close contact with the two side walls of the groove 14 respectively, so that the core tube 2 is prevented from moving in the housing 1 along the axial direction of the housing 1 under the driving of the fluid, and impurities in the fluid can be prevented from being deposited in gaps between the side walls of the groove 14 and the corresponding end surfaces of the core tube 2. The inner diameter of the core tube 2 is equal to the inner diameter of the shell 1, and the axis of the core tube 2 coincides with the axis of the shell 1, so that the inner wall of the core tube 2 is aligned with the inner wall of the channel 11 of the shell 1, and impurities in the fluid can be prevented from being deposited on the positions where the end faces of the two ends of the core tube 2 are respectively in close contact with the two side walls of the groove 14.

In some embodiments, the detachable structure includes a first flange 121 disposed at an end of one of the two adjacent housing segments, such as the first housing 12, opposite to the other housing segment, such as the second housing 13, a second flange 131 disposed at the other housing segment, such as the second housing 13, and used for connecting the first flange 121 and the second flange 131, and bolts (not shown in fig. 1).

In some embodiments, a sealing ring 3 is arranged between the end faces of the opposite butt ends of the two adjacent sections of shells to prevent fluid from leaking between the end faces of the opposite butt ends of the two adjacent sections of shells. The sealing ring 3 can be a BX154 steel ring.

The external geometric dimension of the utility model can adopt the dimension of a standard flange pipe section, the installation and the matching use are convenient, and the inlet and the outlet are in pressure grades: 105MPa, drift diameter: 65mm, BX153 steel ring. The housing 1 adopts 4130 forgings, and the mechanical property meets the 75K requirement of APISpec6A metal material. The core pipe 2 embedded in the core pipe can be but is not limited to a scouring-resistant titanium alloy core pipe, the outer diameter of the alloy pipe is 73mm, and the inner diameter is larger than 60 mm. The length of the flowing short section is 700mm, the flowing short section can be formed by combining two sections, and the middle joint is sealed by adopting a first flange, a second flange and a sealing ring 3. The utility model is convenient for daily inspection of the inner wall, and the inner core tube 2 can be replaced in time when the damage is serious, and the whole core tube does not need to be replaced. The utility model is suitable for the requirements of ground flowback test throttling and pressure control operation of ultrahigh pressure oil and gas wells, large-scale sand adding and fracturing shale gas wells and large-scale acidizing marine phase gas wells.

It will be appreciated that the above-described housing 1 is divided into two sections, the number of which is not a specific value but may be a larger number as necessary.

It should be noted that the various features described in the foregoing embodiments may be combined in any suitable manner without departing from the scope of the utility model. The utility model is not described in any further detail in order to avoid unnecessary repetition.

The present invention has been described in detail with reference to the embodiments, which are illustrative rather than restrictive, and variations and modifications thereof are possible within the scope of the present invention without departing from the general inventive concept.

Claims

1. A flow nipple comprises a shell and is characterized by also comprising a core pipe; the shell is of a segmented structure, and two adjacent segments of shells are butted together through a detachable structure; the inner wall of the shell is provided with grooves which extend along the circumferential direction of the inner wall of the shell and are connected end to end, and the width of each groove at least spans two adjacent sections of the shells; the core pipe is detachably sleeved in a cylindrical accommodating space formed by the enclosing of the groove, and the end faces of the two ends of the core pipe face to the two side walls of the groove respectively.

2. The flow nipple of claim 1, wherein the detachable structure comprises a first flange disposed at an end of the two adjacent housings opposite to the other housing, a second flange disposed at the other housing, and a bolt for fastening the first flange and the second flange.

3. The flow nipple of claim 1, wherein a seal ring is provided between end faces of the opposite butt ends of the two adjacent segments of the housing.

4. The flow nipple of claim 1, wherein the end faces of the two ends of the core tube are respectively in close contact fit with the two side walls of the groove.

5. The flow sub of claim 4, in which the core tube has an inner diameter equal to the inner diameter of the housing, and the axis of the core tube is coincident with the axis of the housing.

6. The flow sub of any one of claims 1 to 5, wherein said housing is divided into two sections.