CN212985178U

CN212985178U - Seamless steel tube for end upsetting multilayer composite perforating gun

Info

Publication number: CN212985178U
Application number: CN202021582576.0U
Authority: CN
Inventors: 汪勇; 伍柱华; 杨雪君; 刘小明; 常峰
Original assignee: Wuxi Sp Steel Tube Manufacturing Co ltd
Current assignee: Wuxi Sp Steel Tube Manufacturing Co ltd
Priority date: 2020-08-03
Filing date: 2020-08-03
Publication date: 2021-04-16
Anticipated expiration: 2030-08-03

Abstract

The utility model belongs to the technical field of interior blind hole perforating gun, a seamless steel pipe for multilayer composite perforating gun of tip jumping-up is disclosed, including inner tube and outer tube, the inner tube be located the inside of outer tube and with outer tube interference fit, the both ends jumping-up of outer tube, the through-hole at a plurality of phase angles is seted up to the inner tube. This kind of compound perforation gun barrel of tip upset thickness is adopted to this kind of scheme, and the perforation gun processing enterprise need not to add the interior blind hole of professional equipment processing again, and improves the qualification rate of interior blind hole processing by a wide margin, greatly reduced manufacturing cost, the blind hole processing mode inefficiency of having solved present interior blind hole perforation gun, and the machining precision is not high, and the lumber recovery is not high, the higher problem of processing cost.

Description

Seamless steel tube for end upsetting multilayer composite perforating gun

Technical Field

The utility model relates to an interior blind hole perforating gun technical field, more specifically say, relate to a seamless steel pipe is used to compound perforating gun of multilayer of tip jumping-up.

Background

Present oil gas field perforation operation is worn the depth in order to promote the perforation, promotes oil well output, often adopts interior blind hole perforating gun, and the purpose changes the blasting height of perforating gun, but the blind hole processing mode of interior blind hole perforating gun is mostly at present: the inner blind hole is machined in the inner surface of the seamless steel pipe in a machining mode, the machining mode is low in efficiency, machining precision is low, the yield is low, and therefore machining cost is high.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved

To the problem that exists among the prior art, the utility model aims to provide a seamless steel pipe is used to compound perforating gun of multilayer of tip upset thickness, the blind hole processing method that has solved present interior blind hole perforating gun is inefficient, and the machining precision is not high, and the lumber recovery is not high, the higher problem of processing cost.

2. Technical scheme

In order to solve the above problems, the utility model adopts the following technical proposal.

The end-upset seamless steel tube for the multilayer composite perforating gun comprises an inner tube and an outer tube, wherein the inner tube is positioned inside the outer tube and is in interference fit with the outer tube, two ends of the outer tube are upset, and the inner tube is provided with a plurality of through holes with phase angles.

3. Advantageous effects

Compared with the prior art, the utility model has the advantages of:

this kind of compound perforation gun barrel of tip upset thickness is adopted to this kind of scheme, and the perforation gun processing enterprise need not to add the interior blind hole of professional equipment processing again, and improves the qualification rate of interior blind hole processing by a wide margin, greatly reduced manufacturing cost, the blind hole processing mode inefficiency of having solved present interior blind hole perforation gun, and the machining precision is not high, and the lumber recovery is not high, the higher problem of processing cost.

Drawings

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

The reference numbers in the figures illustrate:

1. an inner tube; 2. an outer tube; 3. and a through hole.

Detailed Description

The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention based on the embodiments of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "sleeved/connected", "connected", and the like are to be understood in a broad sense, such as "connected", which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1, an end-upset seamless steel tube for a multilayer composite perforating gun comprises an inner tube 1 and an outer tube 2, wherein the inner tube 1 is located inside the outer tube 2 and is in interference fit with the outer tube 2, two ends of the outer tube 2 are upset, the inner tube 1 is provided with a plurality of phase angle through holes 3, a multilayer composite perforating gun barrel is formed by combining the inner tube 1 and the outer tube 2, after the end upset treatment, special equipment is not required to be added for processing inner blind holes, the qualification rate of processing the inner blind holes is greatly increased, and the production cost is greatly reduced.

The seamless steel tube for the multilayer composite perforating gun with the upset end part adopts the modes of multilayer composite, end part upsetting and quenching and tempering heat treatment for processing:

1) processing the inner pipe 1 and the outer pipe 2: firstly, processing an inner pipe 1 and an outer pipe 2 in a cold rolling/cold drawing mode (the outer diameter of the inner pipe 1 is slightly larger than the inner diameter of the outer pipe 2, and the inner pipe 1 and the outer pipe 2 are in interference fit after compounding); then, the inner tube 1 is processed with the through hole 3 by adopting a laser cutting mode, so that a very accurate phase angle can be ensured;

2) multilayer compounding: firstly, smearing a certain amount of lubricant on the surface of an inner tube 1, quickly heating an outer tube 2 to 400-900 ℃, quickly inserting the inner tube 1 into the outer tube 2, and limiting the end part of the outer tube 2 by adopting a die;

3) upsetting the pipe end: upsetting the two ends of the multilayer pipe compounded with the inner pipe 1 and the outer pipe 2: firstly, heating the pipe end of the composite pipe to 1100-1300 ℃ by adopting a medium-frequency heating mode, and then upsetting the end part by adopting a special die, so as to ensure that the diameter of the outer pipe 2 is not changed and the wall thickness is increased by 3-5 mm;

4) quenching and tempering heat treatment: and (3) carrying out quenching and tempering heat treatment on the composite pipe after upsetting, so as to ensure high strength and good impact toughness.

In summary, the following steps: this kind of compound perforation gun barrel of tip upset thickness is adopted to this kind of scheme, and the perforation gun processing enterprise need not to add the interior blind hole of professional equipment processing again, and improves the qualification rate of interior blind hole processing by a wide margin, greatly reduced manufacturing cost, the blind hole processing mode inefficiency of having solved present interior blind hole perforation gun, and the machining precision is not high, and the lumber recovery is not high, the higher problem of processing cost.

The above description is only the preferred embodiment of the present invention; the scope of the present invention is not limited thereto. Any person skilled in the art should also be able to cover the technical scope of the present invention by replacing or changing the technical solution and the improvement concept of the present invention with equivalents and modifications within the technical scope of the present invention.

Claims

1. The end upsetting seamless steel tube for the multilayer composite perforating gun is characterized in that: the anti-interference steel pipe comprises an inner pipe (1) and an outer pipe (2), wherein the inner pipe (1) is located inside the outer pipe (2) and is in interference fit with the outer pipe (2), two end portions of the outer pipe (2) are upset, and the inner pipe (1) is provided with a plurality of through holes (3) with phase angles.