SU1609963A1 - Sealing member of packer - Google Patents

Abstract

The invention relates to the oil and gas industry and is intended to divide a well bore. The purpose of the invention is to improve the reliability of the sealing element (CU) packer. The UE packer is a bowl 1 in the form of a segment of a paraboloid of rotation made of a material with a shape memory effect, rigidly mounted on the barrel. On the bowl 1, corrugations 3 are made with attenuation of the amplitude of the corrugations as one approaches the top of the paraboloid. At the upper edge of the 5 bowl 1 in section 4 the amplitude of the corrugations is maximum. The bottom bottom section 6 of the bowl is made smooth and has a minimum amplitude. The smooth and corrugated parts of the bowl 1 are broken along line 7. As the sealing element descends into the well and the temperature rises in the interval of its location, the corrugations gradually straighten as the line 7 moves upwards. At the place of installation of the sealing element with the calculated temperature, the bowl completely blocks the passage of the casing. In case of obstruction, the sealing element of intermediate intervals with elevated temperature, as well as for lifting it from the well, to it is supplied from the wellhead through pipes cooling fluid. 3 il.

Description

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FIELD OF THE INVENTION The invention relates to the oil and gas industry, and specifically to devices for separating a wellbore.

The purpose of the invention is to increase the reliability of the sealing element.

Figure 1 shows the sealing element of the packer in the transport area; Figure 2 is the same in the state packed in the casing; on fig.Z - bowl sealing element.

The sealing element of the packer contains a bowl 1 of a material with a shape memory effect and a barrel 2, which are rigidly connected to each other. The cup 1 is made in the form of a paraboloid: rotation with a base diameter greater than the maximum internal diameter of the casing pipe. On the bowl 1, longitudinal corrugations 3 are made with a maximum amplitude in section 4 at the upper edge 5 of bowl 1 and a minimum 25 amplitude at the bottom section 6 of bowl 1, which is not corrugated and has a hollow shape. The smooth bottom section 6 and the corrugated upper part of the bowl are separated by a line 7, having the shape of a regular ring.

The sealing element of the packer works as follows.

On the barrel 2, mounted on the column tubing (tubing), the bowl 1 is lowered into the well. As the pace descends and increases20

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At intervals traveled by the cup 1, it straightens, with smoothing, the corrugations and moving line 7 upwards and, when reaching productive intervals, is automatically transferred to the working position. In case it is necessary to freely lower the bowl 1 through a long interval, having a temperature at which the bowl is straightened to completely block the flow channel of the column, the bowl is cooled with liquid injected through the tubing from the mouth. The coolant supply is stopped after the cup 1 has reached a predetermined well interval. If the temperature at the place of installation of the bowl is not sufficient to tightly close the well bore to the thicket, a downhole heater is used.

To remove the packer sealing element, coolant is pumped from the well into the tubes.

Claims (1)

Invention Formula The sealing element of the packer, made in the form of a bowl of a material that has a shape memory effect, is rigidly fixed on the barrel, and, in order to increase the reliability of the sealing element, the thicket is made as a segment of a paraboloid of rotation, the surface of which is corrugated with damping of the amplitude of the corrugations as you approach the vertex of the paraboloid. Phage. 2 FIG.