SU1218077A1 - Apparatus for closing-off pipe string - Google Patents

Description

The invention relates to the oil industry, intended to prevent liquid overflow through pipes during the repair of oil and gas wells.

The aim of the invention is to expand the field of application of the device.

FIG. 1 shows the device, a general view; in fig. 2 is a view A of FIG. one; in fig. 3 is a view B in FIG. one.

The device includes a housing 1, inside

at the end 8, there is an ellipsoid opening 9, an elastic shutter 2 is pushed into the chamber 3, hit the stop 6, opening the nozzle 7, and the pumped fluid passes freely through the ellipsoid opening 9 and the lower end 10 to the bottom. In the case of pipe lifting, the flow of fluid through the end of GO creates a back pressure on the elastic shutter 2, which is located on the stopper 6, and since the elastic shutter 2.10 is located, the flow cross-section di of the end 10 is smaller than the aisle. 4, a foot section d of a hole in the delimiting grooves 5, and a stop 6 with an aperture 6, the back pressure created in a part having an internal diameter d. In dimension 3, it lifts the elastic shutter 2, in the casing 1, a branch pipe 7 is installed, the upper second is pressed against the saddle 4, the forefinger 8 of which has an ellipsoid inside-pipe space. In version 9, the smaller section through which the pipes are lifted up to the diameter of the elastic valve 2, and the bottom without flow of liquid through the pipes. The research institute has an end 10 with an internal hole. If it is necessary to flush through it with a diameter di, and d is greater than di pipe, i.e. pumping liquid through the annulus. The device works as follows. The tube space is created. -20 pressure on the elastic valve 2 above the compressor pipes in the outflowing well-formation pressure, the ball slips the saddle to the lower end of the pipe wrapped

the device, inside which there is an elastic shutter 2. At the same time, the flow of liquid, pressing to the saddle 4, elastic shutter 2,

lo 4 and with the flow rises through the pipes and goes to the surface. As a result of this, the pipes and the device are released from the elastic gate 2. In connection with

prevents liquid from overflowing through the pipe; this can be carried out work related to b1. The wellbore fluid, seeping through the direct and backwash wells,

Once the grooves 5 into the pipes, fills them, keeping the fluid level below the wellhead. After the pipe has been poured without overflow to the design depth, work is carried out related to well repair (for example, washing the bottom, sandblasting perforation, cementing, etc.).

During the injection of fluid into the pipes

elastic shutter 2, falling on the upper end 8, slides on its slope, because

in the case of pipe lifting to the surface, an elastic plug 2 together with the liquid is pumped into the tubes before it slips into chamber 3 and gets onto the stopper 6. In this case, the tubes are lifted without overflowing the fluid through the tubes as a result of the shut-off of the internal pipe in the saddle 4 2

at the end 8, there is an ellipsoid opening 9, an elastic shutter 2 is pushed into the chamber 3, hit the stop 6, opening the nozzle 7, and the pumped fluid passes freely through the ellipsoid opening 9 and the lower end 10 to the bottom. In the case of pipe lifting, the flow of fluid through the end of GO creates a back pressure on the elastic shutter 2, which is located on the stopper 6, and since the flow cross section di of the end 10 is smaller than the flow cross section d of the hole in the stopper 6, the back pressure created in chamber 3, lifts the elastic shutter 2, which is pressed by the flow to the saddle 4, overlapping the inner tube space. In this connection, the lifting of the pipes is carried out without overflowing the liquid through the pipes. If reverse flushing through pipes is required, i.e. fluid is pumped through the annular into the tube space, pressure is created on the elastic gate 2 above the reservoir pressure, the ball slides

in the case of pipe lifting to the surface, an elastic plug 2 together with the liquid is pumped into the tubes before it slips into chamber 3 and gets onto the stopper 6. In this case, the tubes are lifted without overflowing the fluid through the tubes as a result of the shut-off of the internal pipe in the saddle 4 2

FIG. 2

fig.Z

Compiled by V. Boriskina

Editor L. Veselovska Tehred I. VeresKorrektor O. Lugova

Order 1098/41 Circulation 548 Subscription

VNIIPI USSR State Committee

for inventions and discoveries

113035, Moscow, Zh-35, Raushsk nab. 4/5

Branch PPP "Patent, Uzhgorod, st. Project, 4

Claims (1)

A device for overlapping a column of pipes, comprising a body made in the form of a chamber with a saddle and a stopper with an opening, and an elastic shutter, characterized in that, in order to expand its scope, it is equipped with a pipe placed in the housing, the upper end of which is inclined to the side of the limiter and has a passage section less than the diameter of the elastic shutter, and the passage section of the lower end of the pipe is less than the passage section of the hole in the limiter. FIG. 1