RU50597U1 - Sludge trap - Google Patents

Abstract

Sludge trap refers to filtering devices and can be used in the operation of oil and gas wells. The sludge trap consists of the outer and inner pipes hermetically connected to each other and the plugs from below, the upper edge of the inner pipe is connected to the inner wall of the outer pipe and has a curved section in its upper part, and the rest of it is parallel to the outer pipe, and the ratio of the diameters of the outer and inner pipes is not less than 2.5.

Description

The proposal relates to filtering devices and can be used in the operation of oil and gas wells.

A known anti-sand filter (see RF patent No. 2158358, E 21 B 43/08, published by BI No. 30 dated 10.27.2000), consisting of concentrically arranged outer, intermediate and inner pipes, the latter is provided with holes, and an adapter, with the inner pipe equipped with a filter mesh located inside it, made in the form of a screw and attached opposite the holes located along a helical line, in addition, the outer and inner pipes in the upper part are connected by tangential pipes, and the inner and intermediate pipes are the lower part is also interconnected by tangential nozzles, but oppositely oriented, while the annular gap between the intermediate and inner pipes in the upper part, as well as the upper and lower parts of the inner pipe are equipped with plugs, the outer pipe in the upper part is equipped with elastic rings, and in the lower part - a stub.

The disadvantage of this device is the design complexity and high metal consumption and, as a result, high manufacturing costs.

Also known is an anti-sand filter (see RF patent No. 43304, E 21 B 43/00, published Bull. No. 1, dated January 10, 2005), consisting of concentrically arranged outer and intermediate and inner pipes, while the outer pipe is sealed with an inner pipe by a sub, below which the inlet pipes are located, and below it is plugged, while the inlet pipes connect the outer space of the outer pipe with its inner space, and the upper part of the intermediate pipe is rigidly and hermetically connected to the inner pipe by a cone, and the lower Thread edge intermediate pipe located below the bottom edge of the inner pipe.

A disadvantage of the known device is the impossibility of sedimentation of particles in the collector with large flow rates of the well, since the distance between each of three

concentrically positioned pipes are insufficient due to the limited size of the well. In addition, the design is metal-intensive and difficult to manufacture.

The objective of the utility model is to simplify the design and increase work efficiency.

The problem is solved in that in an anti-sand filter, consisting of outer and inner pipes hermetically connected to each other and a plug from below, the upper edge of the inner pipe is connected to the inner wall of the outer pipe and has a curved section in its upper part, and the rest of it is parallel to the outer pipe, moreover, the ratio of the diameters of the outer and inner pipes is not less than 2.5.

The connection of the upper edge of the inner pipe with the inner wall of the outer pipe allows the inner pipe to act as inlet pipes, simplifies manufacturing, and eliminates the use of additional inlet pipes.

The implementation of the inner and outer pipes with a ratio of diameters of at least 2.5 allows you to effectively use the inner diameter of the well.

The drawing shows a General view of the proposed device.

The sludge trap consists of an outer pipe 1 and an inner pipe 2. The upper edge of the inner pipe 2 is hermetically connected to the inner wall of the outer pipe 1 and has a curved section in its upper part and acts as an inlet pipe. The rest of the inner pipe 2 is parallel to the outer pipe 1, and the ratio of the diameters of the outer and inner pipes is at least 2.5. This is the most optimal ratio, where the diameter of the pump plunger, stroke length, number of swings and kinematic viscosity of the oil were taken into account when calculating the diameter of the inner pipe 2.

The sludge collector in the proposed device is the lower part of the outer pipe 1 of the tubing, which is plugged with a plug 3. If necessary, the length of the sump can be adjusted by adding additional tubing connected through a sleeve. with outer pipe 1.

Sludge trap works as follows.

The sludge trap is lowered into the well in the layout with any type of sucker rod pumping equipment and installed on its reception. Well production, driven by the action of the pump through the inner pipe 2, acting as an inlet pipe, enters the inner space of the outer pipe 1, where the flow direction changes from downward to upward. In this case, the particles are naturally precipitated by gravitational forces into the sludge collector. In addition, an optimal diameter ratio of 2.5 contributes to the change

the velocity of fluid in the inner and outer pipes, which leads to better deposition of particles at any flow rates of wells.

The proposed design of the sludge trap can simplify the design and increase the efficiency of the sludge separation process and prevent clogging of the pump.

Claims (1)

Sludge trap, consisting of outer and inner pipes hermetically connected to each other and a bottom plug, characterized in that the upper edge of the inner pipe is connected to the inner wall of the outer pipe and has a curved section in its upper part, and the rest of it is parallel to the outer pipe, and the ratio of diameters outer and inner pipes of at least 2.5.