SU1492023A1 - Arrangement for starting a well - Google Patents

Abstract

The invention relates to the oil and gas industry. The goal is to increase the reliability of the device by preventing wear of the sealing element. The device comprises a hollow body (K) 1 with radial holes 2, a bypass valve 3 arranged therein, a sealing element (UE) 4 with radial channels 11, a sleeve (B) 5 with grooves 6, stops 7, a load 8 with flexible elements 9 and a thrust washer 10. With the possibility of axial movement, B 5 is placed on K 1. Stops 7 are rigidly connected to K 1 and placed in slots 6 B 5. Washer 10 is mounted on stops 7. Load 8 is installed on B 5 under stops 7, on B 5 is placed UE4 and is connected with its front parts with it and with a washer 10. With the help of a cable 12 K 1 is connected with a winch at the wellhead. The outer surface of UE4 is made in the form of acute-angled corrugations 13. The corrugations 13 are directed by sharp edges radially. The device is lowered into the drill pipes 14 on the cable 12. During the swabbing process, the load 8 is braked by flexible plates 9 about the drill pipes 14, the CLE 4 periodically compresses and seals the pipe space and expands. The deformation of the UE 4 is accompanied by the flow of fluid through the radial channels 11 from the cavity between B 5 and UE 4 into the tube space and back. The device allows to significantly reduce the time of the well completion process and reduces its labor intensity. 1 hp ff, 1 ill.

Description

the axial displacement B 5 is placed on K 1. The stops 7 are rigidly connected to K 1 and placed in the slots 6 V. 5. The washer 10 is mounted on the stops 7. The load 8 is mounted on B 5 under the stops 7, on B 5 an ultrasonic is placed and n is connected with its end parts with it and with a washer 10. With the help of a cable 12 K 1 is connected with a winch at the wellhead. The outer surface of UE 4 is made in the form of acute-angled corrugations 13. The corrugations 13 are directed by sharp edges radially. The device is lowered into the drill92023

Tubes 14 on the cable 12, I, by the swabbing process, the load is braked by 8 flexible plates 9 and drill pipes 14, UE 4 is periodically compressed and seals the pipe space and expands. The UE 4 deformation is accompanied by the flow of fluid through the radial channels 11 of the cavity between B 5 and UE 4 into the tube space and back. The device allows to significantly reduce the time of the well completion process and reduces its labor intensity.

1: 1 3. item f-ly, 1 ill.

The invention relates to the oil and gas industry, in particular to devices for well development.

The purpose of the invention is to increase the reliability of the device due to

prevent wear of the sealing element.

The drawing shows the device, a general view, a section about

The well completion device includes a hollow body 1 with radial holes 2, a relief valve 3 arranged therein, a sealing element A, a sleeve 5 with grooves 6, stops 7, a load 8 with flexible elements 9 and a support washer 10. In a sealing element And radial channels 11 are made. Sleeve 5 is placed concentrically on the case 1 and can be axially displaced, and stops 7 are rigidly connected to the case and placed in slots 6 of sleeve 5c. Support plate W is mounted on unors 7, and load 8 is installed on sleeve 5 under them. The sealing element A is placed on the sleeve 5 and is connected with its end parts to it and to the support washer 10. The housing 1 is connected by a cable 12 with a winch (not shown) mounted on the wellhead and the outer surface of the sealing element A form of acute-angled corrugations 13, which are directed by sharp edges, radically “

The device dp development well works as follows.

The device is lowered into the drill pipes 1A on the cable 12. In the process of swabbing when the device is lowered under the level of flushing fluid in the drill pipes 14 due to the braking of the load 8 by flexible elements 9 about the surface of the drill pipe 14, the braking force is re-supplied through

the sleeve 5 directly onto the housing 1, the sealing element 4o is bypassed. In this case, the sealing element is released (as shown in the drawing) and the flushing liquid flows into the space above the device through the overflow valve 3 and the radial holes 2 and partially through the annular gap between the sealing element A and the inner surface bu

lAo drilled pipes When lifting the device due to the weight of the load 8, the friction of flexible elements 9 against the walls of drill pipes 1A and the resistance provided by the corrugations 13 to the flow of flushing fluid into the space above the device, the sleeve 5 moves relative to the housing 1 downwards and compresses the sealing element A, which is pressed against the walls of the drill pipe 1A. The deformation of the sealing element in the process of swabbing is accompanied by overflows

fluids through radial channels I

11 from the cavity between the sleeve 5 and the sealing element A into the tube space and back “The presence of radial channels 11 in the sealing element A reduces the degree of wear and increases durability.

51492023

Claims (1)

Invention Formula 1 o A well completion device comprising a hollow body with radial holes, an overflow valve placed in the housing and a sealing element, characterized in that, in order to increase the reliability of the device operation by preventing wear of the sealing element, it is provided with a sleeve with grooves, stops, a load with flexible elements and a support washer, and in the sealing element there are radial channels, ten 15 the sleeve is placed concentrically on the housing with the possibility of axial movement, and the stops are rigidly connected to the housing and placed in the slots of the sleeve, while the supporting washer is mounted on the stops, and the weight on the bottom of the sleeve is under the stops, and the sealing element is placed on the sleeve and is connected with its end faces parts with it and thrust washer, 2o Device according to claim 1, characterized in that the outer surface of the sealing element is made in the form of radially directed acute-angle corrugations