RU2000427C1 - Method of plugging of open flowing wells - Google Patents

Abstract

Usage: in the elimination of open oil and gas fountains at the wellhead Summary of the invention: after the preliminary mechanical treatment is put on the free end of the column of the open flowing well with a press fit 3 nozzle pipe

Description

The invention relates to methods for eliminating gas-oil open fountains at the wellhead.

There is a method of eliminating gas-oil and water open-flowing wells by forcing shutoff valves onto an open-flowing well string, in which a clamp is secured to the well string, a frame with shut-off valves, followed by bolt fastening of the shut-off valve flange and the flange mounted on the string wells.

The disadvantage of this method is the use of manual labor in the area of the openly flowing well when securing the clamp to the string, followed by equipping the frame with shutoff valves, which does not provide the necessary safety for the work.

There is a method of closing gushing wells of gas-oil fountains, in which the end of the column is cut with an explosive charge, followed by a flange nozzle on it and manually welding it through the windows on the flange sleeve

The disadvantage of this method is its high reliability when killing the well, since the intermittent weld does not provide tightness, which leads to leakage of products of open well flowing.

The purpose of the invention is to develop a reliable and safe method for jamming a gushing well.

This goal is achieved by pre-machining the free end of the column, then putting the nozzle pipe on it and making a press fit.

Figure 1 shows a top view of a platform with the devices removed; Fig. 2 shows an installation with a device for machining the free end of a column; in Fig.Z - installation with a tip.

The installation comprises platforms 1, made in the form of a box with a round hole 2 in the middle, a slot 3, divided by internal partitions into compartments 5, which are filled with water to increase the working mass of the platform, creating the necessary press fit force. Platform 1 is mounted on racks that represent hydraulic jacks 6, obsoCO

with

u o

§

wu vi

ABOUT

printing movement of the platform in a vertical plane (raising and lowering). The lower ends of the struts are supported by rollers 7, which move the platform 1 in a horizontal plane along guides 8. made of channels and located symmetrically with respect to the open-flowing well column 9. The movement of the platform 1 along the guides 8 is carried out with the help of a vehicle, for example, tractor 10. Ensuring the accurate approach of the platform 1 to the column 9 of an open flowing well is carried out using beacons 11 and landmarks 12 installed symmetrically along the horizontal axes of the column 9 and the hole 2 platforms 1 respectively. The platform 1 is equipped with a gripper 13. by means of which, when installed in the hole 2, fixtures are fixed, as necessary, for machining the free end of the column 9 or the head with shutoff valves.

The device for machining the free end of the column 9 consists of a gearbox 14 with a hollow spindle 15, on the upper end of which a branch pipe 16 is mounted, and a tool for machining, for example, the milling cutter 17, is mounted on the lower end. The mechanical processing of the free end of the column 9 is carried out for more reliable providing a press fit. The tool is driven by an electric motor through a gearbox.

The tip consists of a nozzle pipe 18, a crosspiece 19, stop valves 20 and branch pipes 21 and 22, a branch pipe 16.

Using the described installation, the proposed method is carried out as follows.

A platform 1 is mounted on the guides 8, on which a device for machining the free end of the column 9 is mounted. The device 10 assembled in this way is pulled by the tractor 10 onto the column 9 of the openly flowing well and, when the masks 11 and landmarks 12 are aligned along the horizontal axis, the hydraulic jacks 6 are lowered onto the free the end of the column 9. The products are open

gushing wells pass through a hollow cutter 17, a hollow spindle 15. a downpipe 16 and are discharged into a safe area for work. Production t

machining the free end of the column 9. At the end of the machining, the platform 1 is lifted by hydraulic jacks 6 to the required height, releasing the column 9, and with a reverse stroke

the tractor 10 is moved to its initial position outside the flowing well, where the machining tool is dismantled and a head with stop valves is mounted in its place.

Then re-run platform 1 on the column 9, while the products of open flowing of the well through open shutoff valves 20, nozzles 21 and 22 and the discharge pipe 16 are discharged

safe distance. The nozzle pipe 18 is held above the torch of a burning well to heat it up to the hot press mountains, after which the platform 1 is lowered with hydraulic jacks, pushing the nozzle pipe 18 onto the free end of the column 9, as a result, the well is jammed using shutoff valves 20 and pipe 22. Release of the head from the gripper 13 and in the reverse stroke of the tractor,

platform 1 roll back to its original position.

If the products of the open flowing well are not burning, the nozzle pipe 18 is made with holes for fastening

bolts to the well string to increase the reliability of the connection due to the absence of hot press fit.

Claims (1)

SUMMARY OF THE INVENTION A method for shutting open flowing wells, including preparing a free end of a column, installing and securing a nozzle with shutoff valves on it, characterized in that the end of the column is machined and the nozzle is fixed on the column by press fit by applying a vertical load to it while the nozzle is made in the form of a pipe. Fig 2 s / jr /// w / jy /// w l f & / 9 FIG. 5 / 6 22nd