CN205206799U - Self -cleaning embedded screen pipe of whirl - Google Patents

Abstract

The utility model discloses a swirling flow self-cleaning embedded screen pipe, which comprises an embedded filter pipe installed in a screen pipe jacket, and the screen pipe jacket includes an oil pipe coupling and an oil pipe threadedly connected with the oil pipe coupling Short joint: the embedded filter tube includes a tapered circular pipe and a pipe holder, and the top of the tapered circular pipe is fixed in the short joint of the oil pipe by the pipe holder. In this way, the filtered medium is forced to form a swirling flow when it enters the conical filter tube from the lower end of the short joint of the oil pipe to achieve the purpose of self-cleaning; and due to the existence of the taper, it is difficult for sand particles to accumulate in the conical filter tube under the double action of gravity swirl On the wall, so as to achieve the purpose of long-term sand control, greatly reduce the number of stuck pump operations, and provide equipment guarantee for reducing production costs and stabilizing production.

Description

A swirl self-cleaning embedded screen

technical field

The utility model belongs to the field of petroleum, natural gas and coal bed methane exploitation, in particular to a swirl self-cleaning embedded screen pipe.

Background technique

In the exploitation of oil and gas fields, special wells such as sand wells and pulverized coal wells bring difficulties to oil and gas production, and affect the production speed and recovery rate of oil and gas layers. This kind of special well brings many hazards. Wells with severe sand production will accumulate sand in the well to form sand plugs, reducing the production of oil and gas wells or even stopping production; increasing workover workload and increasing production costs; damage to pumping equipment, etc. Therefore, in order to ensure high and stable production of oil and gas fields, various effective technical measures focusing on prevention must be adopted to solve this problem.

Slotted screen, as one of the main sand and coal dust control tools, is increasingly widely used in oil and gas field exploitation because of its advantages of high strength and low cost. At present, the slotted screens widely used in oil and gas fields at home and abroad have the following problems: sand or coal powder will accumulate on the screen wall, poor self-cleaning performance, and easy to block.

In view of this, the utility model is proposed.

Utility model content

The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a swirl self-cleaning embedded screen tube.

In order to solve the above-mentioned technical problems, the basic idea of the technical solution adopted by the utility model is: a swirl self-cleaning embedded screen tube, including an embedded filter tube installed in the screen tube casing, and the screen tube casing includes an oil pipe connector hoop and the tubing nipple that is threadedly connected with the tubing collar; the inline filter tube includes a tapered round pipe and a pipe holder, and the top of the tapered round pipe is fixed in the tubing nipple by the pipe holder .

Further, the tapered circular tube is vertically welded on the pipe holder, so that the central axis of the tapered circular tube coincides with the central axis of the tubing nipple.

Further, the wall of the tapered circular tube is evenly distributed with slits forming an angle of 10-30 degrees with the central axis.

Further, the width of the slit is 0.15-0.3mm.

Further, the pipe support is installed in the short joint of the oil pipe through pins.

Further, the length of the tubing nipple is 2m or 3m, and the outer diameter of the tubing is 73mm or 89mm.

After adopting the above technical solution, the utility model has the following beneficial effects compared with the prior art: the swirling flow self-cleaning embedded screen mainly consists of a screen casing and an embedded filter tube. The built-in filter tube is fixed inside the tubing nipple by the tube support, which forces the filtered medium to form a swirl flow when it enters the conical filter tube from the lower end of the tubing nipple to achieve the purpose of self-cleaning; The dual action of the sand makes it difficult for sand particles to accumulate on the wall of the conical filter pipe, thereby achieving the purpose of long-term sand control, greatly reducing the number of pump stuck operations, and providing equipment guarantee for reducing production costs and stabilizing production.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the B-B sectional view of the utility model.

In the figure: 1-oil pipe coupling; 2-oil pipe nipple; 3-tapered round pipe; 4-pipe support; 5-pin; 6-slit.

detailed description

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described further, to help understand the content of the utility model.

As shown in Figures 1 and 2, the swirl self-cleaning embedded screen mainly includes a screen casing and an embedded filter tube. The screen casing is composed of a tubing coupling 1 and a tubing nipple 2 with threads processed at both ends. The length of the pup joint 2 is divided into two types: 2 meters and 3 meters, and the outer diameter of the tube is divided into two types: 73mm and 89mm; the embedded filter tube is composed of a conical circular tube 3 and a tube support 4, and the conical circular tube 3 is clamped with the axis. The pipe wall is evenly distributed with several slots 6 at an angle of 10-30 degrees with the axis, and the width of the slots 6 is 0.15-0.3mm.

The slit 6 and the axis are set at an angle of 10-30 degrees, and the width is set at 0.15-0.3mm, which is more conducive to the flow of liquid, forms a swirling flow, is not easy to form a blockage, and increases the effective service life. Therefore, the slit 6 The optimized design enhances the self-cleaning ability of the screen and reduces maintenance costs.

Connect the oil pipe coupling 1 to one end of the oil pipe nipple 2 through threads; weld the tapered round pipe 3 vertically on the pipe support 4 to ensure that the central axes of the two coincide; finally pass the embedded filter tube through the pipe support 4 The pin 5 is installed on the short joint 2 of the oil pipe, and finally forms a swirl self-cleaning embedded screen.

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made, these improvements and Retouching should also be regarded as the scope of protection of the present utility model.

Claims (7)

1. the self-cleaning embedded screen casing of eddy flow, comprise the inline filtration pipe be arranged in screen casing overcoat, it is characterized in that, the tubing nipple (2) that described screen casing overcoat comprises tubing coupling (1) and is threaded with described tubing coupling (1); Described inline filtration pipe comprises taper pipe (3) and conduit saddle (4), and described taper pipe (3) top is fixed in described tubing nipple (2) by described conduit saddle (4).

2. the self-cleaning embedded screen casing of eddy flow as claimed in claim 1, it is characterized in that, described taper pipe (3) is vertically welded on described conduit saddle (4), and the axis of described taper pipe (3) is overlapped with the axis of described tubing nipple (2).

3. the self-cleaning embedded screen casing of eddy flow as claimed in claim 2, is characterized in that, the tube wall of described taper pipe (3) is evenly distributed with the slot (6) becoming 10-30 degree angle with described axis.

4. the self-cleaning embedded screen casing of eddy flow as claimed in claim 3, it is characterized in that, the width of described slot (6) is 0.15-0.3mm.

5. the self-cleaning embedded screen casing of eddy flow as described in as arbitrary in claim 1-4, it is characterized in that, described conduit saddle (4) is arranged in described tubing nipple (2) by pin (5).

6. the self-cleaning embedded screen casing of eddy flow as described in as arbitrary in claim 1-4, it is characterized in that, the length of described tubing nipple (2) is 2m or 3m, and pipe external diameter is 73mm or 89mm.

7. the self-cleaning embedded screen casing of eddy flow as claimed in claim 5, it is characterized in that, the length of described tubing nipple (2) is 2m or 3m, and pipe external diameter is 73mm or 89mm.