RU62162U1 - FILTER FOR PLASTIC LIQUID - Google Patents

Abstract

The utility model relates to the field of mining, and can be used as a filtering device for any formation fluid placed in drilled wells for operational purposes. The technical essence of the utility model lies in the fact that in the known filter for reservoir fluid containing a perforated housing with a thread connecting to the casing string, both ends of the wire, a drainage substrate in the form of a coarse mesh, a fine mesh filter mesh pressed against the housing by a spiral wire and protective perforated casing, the substrate is made spiral with a pitch of at least the diameter of the holes of the perforation of the body, and the holes of the perforation of the casing are made in the form of truncated cones m lym base outwardly.

TECHNICAL-ECONOMIC OR OTHER EFFICIENCY

1. Increasing the flow rate of the reservoir fluid.

2. Increasing the degree of purification of the reservoir fluid. 2 of FIG. silt

Description

The utility model relates to the field of mining, and can be used as a filtering device for any formation fluid placed in drilled wells for operational purposes.

Known filters for reservoir fluid, containing a perforated housing with a thread connecting to the casing string at both ends, and a fine mesh filter mesh pressed to the housing by a spiral wire (Gavrilko V.M., Alekseev BC, Drill hole filters. Reference book. M., Nedra , 1985, 334 pp. Ill.).

A disadvantage of the known devices is the low filter capacity due to significant hydraulic resistance between the housing and the filter mesh.

This drawback was eliminated in the design of the reservoir fluid filter, comprising a perforated housing with a thread connecting to the casing string at both ends, a wire drainage substrate in the form of a coarse mesh, a fine mesh filter mesh pressed to the housing by a coiled wire, and a protective perforated casing (RF patent for utility model No. 388830 IPC E 21 V 43/08, published on 10/07/2004 - prototype).

A disadvantage of the known device, which we have chosen as a prototype for the majority of coinciding features, is also low throughput due to stagnant zones created in the substrate grid, which prevent overflow of formation fluid along the body to perforations.

The problem solved by the use of the claimed utility model is to increase the filter capacity and the degree of purification of the reservoir fluid.

The technical essence of the utility model lies in the fact that in the known filter for reservoir fluid containing a perforated body with a thread connecting to the casing string at both ends, a wire drainage substrate in the form of a coarse mesh mesh, a fine mesh filter mesh pressed against a twisted housing

a spiral wire, and a protective perforated casing, the substrate is made spiral with a pitch of at least the diameter of the holes of the perforation of the body, and the holes of the perforation of the casing are made in the form of truncated cones with a small base outward.

The implementation of a spiral substrate with a pitch of at least a diameter of the holes of the perforation of the body ensures the elimination of stagnant zones that prevent the flow of formation fluid along the body to the perforation holes.

The implementation of the holes of the perforation of the casing in the form of truncated cones with a small base outwards provides an increase in the degree of purification of the reservoir fluid and an increase in the filter capacity due to the ejection effect created by the conical channels of the casing.

Figure 1 shows a General view of the device; figure 2 is a view of figure 1.

The filter for the reservoir fluid contains a housing 1 with a connecting thread 2 at both ends, perforated with holes 3, blocked by a fine mesh filter mesh 4 with a drainage substrate 5 and a spiral 6 pressing on a spiral cone, perforated by conical holes 7 by a casing 8, belts 9 attached to the housing 1.

The claimed device operates as follows.

Assembled, as shown in Fig. 1, a filter screwed up with a lower threaded end 2 with a part of the casing playing the role of a settler is gradually connected with the upper threaded end 2 with a production string, lowered to the bottom of the well, placed in the zone of the reservoir.

Then make a test pumping using a tester. The fluid from the "earned" layer enters the cavity of the housing 1 and production casing, being cleaned of sand and other impurities, first in the openings 7 of the casing 8, then in the channels of the filter mesh 4.

The expanding holes 7 intensify the flow of formation fluid into the cavity of the housing 1, and the substrate 5 made in the form of a spiral does not create stagnant zones when the fluid moves between the housing 1 and the filter mesh 4 to the perforation holes 3 of the housing 1. As a result, the degree of purification of the formation fluid increases and the throughput increases filter ability.

TECHNICAL-ECONOMIC OR OTHER EFFICIENCY

1. Increasing the flow rate of the reservoir fluid.

2. Increasing the degree of purification of the reservoir fluid.

Claims (1)

The filter for the reservoir fluid containing a perforated housing with a thread connecting to the casing string at both ends, a wire drainage substrate in the form of a coarse mesh, a fine mesh filter mesh pressed to the housing by a coiled wire, and a protective perforated casing, characterized in that the substrate is made of a spiral with a pitch of at least the diameter of the holes of the perforation of the housing, and the holes of the perforation of the casing are made in the form of truncated cones with a small base outward.