CN2073066U

CN2073066U - Variable aperture joint with multiple connection aperture

Info

Publication number: CN2073066U
Application number: CN 90204531
Authority: CN
Inventors: 张岚; 王孚
Original assignee: LIAONING ENGINEERING PROSPECTI
Current assignee: LIAONING ENGINEERING PROSPECTI
Priority date: 1990-04-16
Filing date: 1990-04-16
Publication date: 1991-03-13

Abstract

The utility model relates to a variable aperture joint with multiple connection apertures, comprising a big straight tube, a transition tube, a small straight tube, etc. After slightly processing, the variable aperture joint can be made into dozens of specifications. The utility model can be used for connecting pipes of well pipe such as well, oil well, gas well, salt well, etc. The utility model has the advantages of simple structure, good mechanical performance, firmness, duration, long service life, easy manufacture, and low cost. Meanwhile, the utility model can reduce storage capacity of the variable aperture joints in a storehouse, and save the investment of installation and maintenance.

Description

Variable aperture joint with multiple connection aperture

The utility model relates to a kind of well casing connection pipe fitting.

The upper end caliber of general well is bigger, so that lay the deep-well pump pump housing, and the lower end caliber is less; Will connect with a reducer union between the small-bore well casing of Shang Duan heavy caliber well casing and lower end like this.

Existing reducer union has two kinds: a kind ofly press panel beating blanking method with the heavy caliber well casing, shorten its termination the size of small-bore well casing into, be welded afterwards, as shown in Figure 1, the heavy line among the figure is represented weld seam.This reducer union that is welded, because weld seam is many, the metallographic structure of weld seam is different with the metallographic structure of well casing, add welding shortcoming, pore, slag inclusion, reasons such as welding stress make the reducer union mechanical property very bad, reliability and serviceability are all very poor, sometimes when behind pipe, just crack, well is scrapped; Another kind is the reducer union that is stamped to form with steel pipe or steel plate, though this punching press reducer union good mechanical property, reliability and serviceability are also very high, but the specification of reducing too many (referring to table 1), the consumption of every kind of specification is all little, and press tool is very expensive, so punching press reducer union cost is too high, and the utmost point is hard to buy on market.

The purpose of this utility model is in order to provide a kind of cost low, good mechanical property, the reducer union that can link with the large and small bore well casing of plurality of specifications again.

It is that example is illustrated that the utility model is achieved in that with accompanying drawing 2: it is by big straight tube 1, transition tube 2, little straight tube 3 compositions such as grade; Be characterized in: big straight tube 1, the pipe thickness of little straight tube 3 are 1.5 times to 7 times of the tube wall thickness that is attached thereto.

Accompanying drawing 3 is blank drawings of the multi-joint interface footpath reducer union of DBJ-1, and this blank can be processed into as 30 kinds of listed reducer unions of table 1.

Use this blank to be processed into any reducer union listed in the table 1, can decide according to large and small bore well casing.As the heavy caliber well casing is φ 351 * 11, and its endoporus is φ 329, but then the cylindrical car of the big straight tube end of DBJ-1 reducer union becomes φ 329 ^-0.2 _-0.4, and insert in the heavy caliber well casing solid welding afterwards; As the heavy caliber well casing is φ 273 * 7.09, but then the interior circle car of the big straight tube end of DBJ-1 reducer union becomes φ 273 ^{+ 0.5} _{+ 0.3}, be enclosed within on the heavy caliber well casing solid welding afterwards, because the big straight-tube portion wall thickness of DBJ-1 reducer union is 36.5 millimeters, be equivalent to 3 to 4 times of general well casing wall thickness, so no matter be to remove 2/3 wall thickness from cylindrical or from interior round either direction car, its mechanical strength still is higher than well casing intensity.Therefore the big straight tube end of DBJ-1 reducer union can with φ 351(wall thickness greater than 11mm), well casings such as φ 340, φ 325, φ 299, φ 273 link, in like manner: the little straight tube end of DBJ-1 reducer union can link with well casings such as φ 146, φ 152, φ 159, φ 168, φ 178, φ 194, thus the DBJ-1 reducer union do slightly processing can be made into as listed totally 30 kinds of reducer unions in the table 1.The DBJ-1 reducer union is except that welding with well casing, but also car becomes scyewed joint, becomes internal thread or outside thread as for car, can decide according to joining well casing size.

The utility model is series product, except that DBJ-1, also has specification reducer unions such as DBJ-2, DBJ-3, and the processing of all the same with the DBJ-1 reducer union do slightly of the reducer union of every kind of specification just can be made into the reducer union of tens kinds of specifications.

The utility model can be made with casting or forging method, because the metal streamline of the reducer union that forging method is made is good, inner shortcoming is few, so mechanical property is better.

The utility model is simple in structure, good mechanical property, sturdy and durable, easy processing and fabricating, cost is low, can make the connection pipe fitting of well casings such as well, oil well, gas well, salt well, because the reducer union in the multi-joint interface of a kind of specification footpath, can make the reducer union of tens kinds of specifications,, save the investment of installation and maintenance so can significantly reduce the storage capacity of storehouse reducer union.

The reducer union specification table that table 1, the multi-joint interface footpath reducer union of BDJ-1 type blank can be made into

φ351／φ146	φ325／φ146	φ273／φ146
			φ351／φ152	φ325／φ152	φ273／φ152
φ351／φ159	φ325／φ159	φ273／φ159
			φ351／φ168	φ325／φ168	φ273／φ168
φ351／φ178	φ325／φ178	φ273／φ178
			φ351／φ194	φ325／φ194	φ273／φ194
φ340／φ146	φ299／φ146
			φ340／φ152	φ299／φ152
φ340／φ159	φ299／φ159
			φ340／φ168	φ299／φ168
φ340／φ178	φ299／φ178
			φ340／φ194	φ299／φ194

Claims

1, a kind of well casing reducer union, it is by big straight tube 1, transition tube 2, little straight tube 3 compositions such as grade, the pipe thickness that it is characterized in that big straight tube 1, little straight tube 3 is 1.5 to 7 times of the tube wall thickness that is attached thereto.