SU1210507A1 - Casing string filter - Google Patents

Abstract

A casing filter comprising a tubular body with protrusions on the outer surface in which filtration channels filled with destructible material are made, characterized in that, in order to increase the filter's duty ratio while maintaining its strength and simplifying the design while ensuring high-quality cementing, the projections on the outer surface The tubular body is made in the form of longitudinal ribs placed along its entire length evenly along the perimeter. (L S O sd o

Description

The invention relates to the mining industry, and more specifically to the oil and gas industry and can be used in the equipment of wells.

The goal is to increase the duty ratio of the filter while maintaining its strength and simplifying the design while ensuring quality cementing.

In Fig.1, the proposed filter is shown, the longitudinal section in Fig.2 is a section A-A in Fig.1, part of the well is filtered.

The casing filter consists of casing 1, connected couplings 2 with a tubular body 3, with longitudinal ribs 4 along the entire length of the tubular body along its perimeter Holes 5 pass through the ribs 4 5 The casing string is surrounded by a cement ring 6 and rocks 7 "

The filter works as follows: After drilling is completed, the location of the productive formations to be opened in the well is determined. On the basis of these data, the tubular body is also included in the casing kit for fixing the wells. The casing filter with reserved filter holes is positioned among the ordinary casing pipes so that they are in the well against the productive formation.

Editor O.Golovach Tehred A.Kravchuk

five

After the casing is lowered into the well, the column is fastened with cement. At this time, pipes with reserved filter openings fulfill the purpose of conventional casing.

After the cement hardens, the reserved holes are opened.

filter against the desired productive horizon. To this end, the required amount of acid is supplied to the filter interval through the drill pipe or pump tubing to dissolve the plugs. Such a casing filter structure may be installed in a casing string at any depth. At the same time, a well casing string can include in CE0 any number of casing pipes of the proposed design, located against all production horizons to be operated by the well at any time. The design makes it possible to both open the filter openings simultaneously and at different times. The increase in the number of filter holes in the casing contributes to the improvement of the conditions for the flow of products from the reservoir into the well, t "e" contributes to the improvement of well perfection

When the ribs are located along the tubular body and the holes are drilled in them, the strength of the pvc column increases.

0

UZ.Z Proofreader M. Maksiminets

 Order 6411 Circulation. 533Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, Projecto st., 4

Claims (1)

CASING FILTER L.A. LIVSHITS The casing filter, including a tubular housing with protrusions on the outer surface, in which filtration channels are made, overlapped by destructible material, characterized in that, in order to increase the filter duty cycle while maintaining its strength and simplifying the design while ensuring high-quality cementing, the protrusions on the outer the surface of the tubular body is made in the form of longitudinal ribs placed along its entire length evenly around the perimeter.