RU106649U1 - TECHNOLOGICAL LAYOUT FOR WELL DEVELOPMENT - Google Patents

Abstract

 Technological layout for well development, which includes a production casing of a well with killing fluid and a bottomhole formation zone with perforation holes and consisting of equipment for swabbing wells, production pipes with bottomhole fluid, a slit pipe filter installed opposite the perforation holes of the formation and the liner resting on a previously cleaned well bottom, characterized in that in order to ensure the possibility of effective cleaning and development of the zone of the productive formation lzovana gidrozhelonka adjustable to containers with the possibility of a single channel from the bottomhole to the wellhead for organizing the collection of fluid motion and bridging of sludge and other deposits in the containers gidrozhelonki adjustable.

Description

The utility model relates to the field of the oil industry, in particular to devices for treating wells from deposits (particulate matter, sand and sludge) and can be used in the development of oil and injection wells after drilling and repair.

As a result of drilling and repair work, a partial destruction of the bottomhole formation zone and the occurrence of deposits occur. Poor flushing of the bottom of the well, associated with incomplete removal of deposits, leads to rapid wear of downhole pumping equipment during the operation of oil wells. In addition, due to the presence of plugs at the bottom, there is an insufficient flow of oil from the reservoir, which entails a decrease in the flow rate of wells.

Well development after drilling or repair can be divided into two stages:

- flushing wells;

- call the flow of fluid from the reservoir.

In the process of flushing a well according to the classical method of development, flushing pipes are run, flushing the well by creating circulation through the pipe and annular spaces of the well to the bottom, lifting of flushing pipes from the well and lowering of tubing string with pumping equipment into it.

In the process of inflow call, the heavier wash solution is replaced with a lightweight solution, thereby reducing the back pressure on the formation.

There is a known method of developing and operating wells, which consists in lowering the borehole with a plunger installed in the upper part, filling the subplunger zone with borehole liquid, raising the borehole to the mouth and fixing it, then lowering the plunger to the bottom of the borehole and displacing the liquid into the oil recovery system (patent RF №2140826, “Method of well development and operation”).

The disadvantage of this method is low productivity due to significant loss of time for unproductive operations.

A known method of development and operation of wells, which consists in lifting the well fluid with a cylinder with a piston on a traction body. Before lowering into the well, a cylinder with a piston in the lower part is fixed on the traction body with a latch fixed in the upper part of the cylinder. The cylinder with the borehole fluid at the wellhead is fixed by the wellhead fixation unit and after the cylinder has been fixed on the traction body, the fluid is displaced from the cylinder cavity by the piston into the collection system (RF patent No. 2151277, “Method for well development and operation”).

The described method has the following disadvantages:

- filling of the cylinder with borehole fluid is carried out through the upper part of the cylinder and a waiting time is required to completely fill it;

- fixing and unlocking of the cylinder at the wellhead is carried out separately by the fixing unit located at the wellhead and the fixing unit on the traction body, which requires time to manage two clamps and, as a result, the low productivity of the method.

When developing oil and injection wells after drilling and repair, swabbing technology is used. In some wells, it is not possible to cause fluid flow even at maximum swab conditions. In this case, a hydroprotector is used, which makes it possible, due to the difference in hydrostatic pressure, to clean the holes of the perforation channels of the wells and to ensure the flow of fluid (RF patent No. 2288343, "Grain for cleaning the wellbore or reservoir").

This device requires additional tripping operations, related materials, labor costs of the well repair team.

Closest to the claimed utility model in technical essence is a device for processing the bottom-hole zone of the formation and development of wells, containing a working pipe, a packer, a hydraulic pump that works from a fluid supply, and an adjustable valve (RF patent No. 2098616 "Device for processing the bottom-hole formation and well development ").

The disadvantage of this device is the low efficiency of well cleaning and insufficient process control.

The purpose of the utility model is to increase the efficiency and quality of well development after repair and drilling, increase operational reliability, reduce the time of work by reducing the number of tripping operations and the continuity of the process.

According to the utility model, the goal is solved by the proposed technological layout for well development, consisting of the following units and equipment: equipment for swabbing wells, process pipes, a slit tube filter, a liner and an adjustable hydrotank.

The technological layout for the development of wells includes a production casing of a well with killing fluid and a bottomhole formation zone with perforations and consists of equipment for swabbing wells, production pipes with bottomhole fluid, a slit pipe filter installed opposite perforation holes of the formation and a liner resting on a previously cleaned bottom wells, and to ensure the possibility of effective cleaning and development of the reservoir zone, a regulated May, a hydraulic reservoir with containers to create a single channel from the bottom to the wellhead to move fluid and collect sludge and other clogging deposits into containers.

The design of the technological layout for the development of wells is illustrated by the drawing in figure 1

The technological layout consists of the following components and equipment: equipment for swabbing wells 1, production pipes 2, an adjustable hydraulic valve 3 with containers, a slit pipe filter 4 mounted opposite the perforation holes of the formation and a shank 5, based on a previously cleaned bottom of the well.

The proposed technological layout for well development works as follows.

After installing an adjustable hydraulic valve 3 with process pipes 2, and lowering the technological layout for developing wells at the drainage site, the technological layout is unloaded. The tube slit filter 4 is positioned so that the slot slots are located opposite the perforation holes of the production casing of the well.

After triggering the adjustable hydraulic valve 3 with containers, due to the difference in hydrostatic pressure, dirt from the bottomhole formation zone is sucked into the containers of the adjustable hydraulic valve 3.

When stabilizing the fluid level and pressure in the containers of the adjustable hydraulic valve 3, equipment for swabbing wells 1 is mounted. Swabbing technology is performed according to the standard scheme until stabilization and the flow of fluid from the reservoir are caused.

After using the energy of the drop of the hydrostatic liquid column, the technological layout for well development is raised up to release the containers of the adjustable hydraulic valve 3 from the sludge.

The proposed technological layout for well development allows you to use the positive qualities of the swab technology and the use of adjustable hydraulic wells with containers for well development.

As a result, the following positive results are achieved:

- the time and number of tripping operations are reduced, and as a result, the time for cleaning the formation is reduced, since the technological layout is enough only once to lower into the well;

- if necessary, it is possible to reuse the adjustable hydraulic valve (when the valve of the hydrostatic unit of the adjustable hydraulic valve is closed, fluid is taken from its container by swabbing);

- the proposed design allows reusable use of the layout without repair and replacement of parts;

- the use of a utility model allows for better development of the reservoir, which, in turn, will prevent the subsequent failure of the downhole pumping equipment;

- the use of technological layout will reduce the number of underground repairs and reduce labor costs of the team;

- preservation of the natural parameters of the productive formation after drilling and the possibility of using this technological arrangement for formations where the pressure is below hydrostatic;

- to improve the quality of well development, due to the use of swab technology, which allows to maintain the continuity of the process and use an adjustable hydroscope to clean the bottom-hole zone of the formation by subsequent swab without raising the process pipes.

The use of technological layout for well development allows you to effectively act on formations, taking into account specific mining and geological conditions, which increases the efficiency of operations.

In the manufacture of the device, material costs are reduced by improving the quality of the parts used, the reliability of the device is increased by reducing the number of moving parts and seals.

The proposed technological layout for well development can be manufactured industrially, as evidenced by the successful testing of a prototype.

Claims (1)

Technological layout for well development, which includes a production casing of a well with killing fluid and a bottomhole formation zone with perforations and consisting of equipment for swabbing wells, production pipes with bottomhole fluid, a slit pipe filter installed opposite the perforation holes of the formation and the liner resting on a previously cleaned well bottom, characterized in that in order to provide the possibility of effective cleaning and development of the zone of the productive formation lzovana gidrozhelonka adjustable to containers with the possibility of a single channel from the bottomhole to the wellhead for organizing the collection of fluid motion and bridging of sludge and other deposits in the containers gidrozhelonki adjustable.