The oil extraction method

 

The invention relates to the oil industry and can be used in oil wells, with the seal of the production string or to translate well to the underlying oil reservoir. The method includes the descent into the production casing casing tubing (tubing) attached at the bottom of the manifold and flush valve. The packer is placed in the lower part of the tubing, above the working oil reservoir and flush valve above the packer. Then translate the packer in working condition with overlapping annular space between the column tubing and the production column for separating the working oil reservoir. Start well in oil. In the case of entry into the well outside water carry out repairs. Determine the interval of leakage in the production string. Down the tubing. The flush valve is placed upstream of the zone of leakage, and the packer is below this zone to separate the working oil reservoir from the receipt into the well outside of the water. The use of the invention eliminates the long expensive repairs. 1 C.p. f-crystals, 1 Il.

The proposal is mi integrity of the production casing or to translate well to the underlying oil reservoir.

In the operation of oil fields, especially the old, the not uncommon occurrence of leakage in the production string in the result of corrosion. After running out of oil or premature watering operated oil class, there is a need to transfer well to the underlying layer. In both cases it is needed to repair and insulation works.

There are various ways to restore the destroyed columns and separation of the layers, including metal patch and bridging agents.

There is a method of repair of wells by lowering into the well of the column tubing with a packer (SU 1514906 A1, E 21 33/12, 15.10.1989.).

The use of this method is ineffective and durable due to the high depression in the production string.

The closest to the invention is a method of oil production, including the descent into the production casing casing tubing (tubing) attached at the bottom of the packer and the flush valve so that the packer was placed above the working oil reservoir and flush valve above the packer, the translation of the packer in working condition with overlapping annular question the wells in oil production (EN 2081303 C1, E 21 IN 43/00, 10.06.1997.).

However, the known method of oil extraction does not provide for the possibility of reducing the inflow into the well any liquid spillages production string.

The technical result of the invention is the provision of opportunities to reduce inflow into the borehole outside of the liquid while maintaining oil production without long and costly repairs.

The technical result is achieved by the fact that the oil extraction method includes lowering in the production casing of the well column tubing attached at the bottom of the packer and the flush valve so that the packer was placed above the working oil reservoir and flush valve above the packer, the translation of the packer in working condition with overlapping annular space between the column tubing and the production column for separating the working oil reservoir and run well in oil production, while in the case of entry into the well outside water carry out repairs, which determines the interval of leakage in the casing, the descent into the production casing of the well tubing shall exercise such of obra Department working oil reservoir from the receipt into the well outside of the water.

In addition, after overlapping the specified annulus packer him above the packer introducing sealing liquid for the overlap interval of leakage in the production string.

The drawing shows an example implementation of the method.

The device for implementing the method consists of a column of tubing 1, the packer 2, the flush valve 3 and the sealing liquid 4. The packer 2 is placed below the zone of receipt of any water, but above the working layer 5. The flush valve 3, is placed above the zone of receipt of any water, serves to conduct technological leaching and plugging of wells during maintenance. The packer 2 and the flush valve 3 are attached to the tubing 1.

The oil extraction method is as follows.

In the production casing 6 well down the drill pipe 1 with fixed thereto packer 2 and flush valve 3. The packer 2 is placed above the working oil reservoir 5. Translate the packer 2 in working condition, blocking the annular space between the casing tubing 1 and the production column 6. When in the borehole outside of the water by known methods to determine the distance of leakage in the casing 6. the 2 is placed below the zone of leakage, but above the working oil reservoir 5, and the flush valve 3 is above the area of leakage. The packer 2 is put in the operating condition extends and overlaps the annular space between the compressor pipe 1 and the production column 6. The oil reservoir 5 is separated from the zone of inflow into the well outside of the liquid. Above the packer 2 the annular space between the tubing 1 and the production column 6, you can optionally fill sealing liquid 4, the overlapping interval leaks. In this case, will be significantly reduced inflow into the borehole outside of the liquid. Well depending on how the operation is run pump deep, or by swabbing.

Claims

1. The oil extraction method, including the descent into the production casing casing tubing attached at the bottom of the packer and the flush valve so that the packer was placed above the working oil reservoir and flush valve above the packer, the translation of the packer in working condition with overlapping annular space between the casing tubing TRU is e oil, characterized in that in the case of entry into the well outside water carry out repairs, which determines the interval of leakage in the casing, the descent into the production casing casing tubing carried out so that the flush valve was placed above the zone of leakage, and the packer below the zone of leakage to separate the working oil reservoir from the receipt into the well outside of the water.

2. The method according to p. 1, characterized in that after closing packer annular space between the column tubing and the production column in the above-mentioned annular space of the borehole above the packer introducing sealing liquid for the overlap interval of leakage in the production string.

 

Same patents:

The invention relates to the oil industry and can be used for registration of the change in time of the pressure in the well when conducting perforating operations

The invention relates to the oil and gas industry, in particular to isolate the flow of formation waters in horizontal wells
The invention relates to mining and can be used for heap leaching of metals, mainly in permafrost

The invention relates to the oil industry, in particular for the acid compositions for treatment of bottom-hole zone (OPZ) oil reservoir, and can be used to restore the injection and increasing the output of the wells, as well as an environment perforation in the process of secondary drilling

The invention relates to the oil industry, namely, devices for processing bottom-hole formation zone, complicated by the reduction of the permeability

The invention relates to the oil and gas industry, namely, development of gas wells, especially at low reservoir pressure (anpd)
The invention relates to the oil industry and can be used in the development of oil deposits, presents a heterogeneous reservoirs using water flooding

The invention relates to the oil and gas industry and can be used when disabling the leaking sections of the casing from the reservoir when disabling and re-enabling the upper and intermediate flooded deposits

The invention relates to the mining industry and is designed to overlap the annulus of oil and gas wells and implementation of technology isolation of bottom water

Packer // 2236555
The invention relates to the field of oil and gas industry, namely, devices for sealing the wellbore between the casing and the column tubing

The invention relates to the oil and gas industry and used in the construction and repair of wells, in particular to a device for isolation of closely spaced productive strata and the elimination of water during workover

Packer unsupported // 2236553
The invention relates to techniques and technologies of well workover, namely the separation cavity between the downhole tool and casing pipes for oil and gas wells

The invention relates to the oil and gas industry, namely, devices for isolation and separation of the layers of the completion and operation of wells, and to turn off layers in the conservation of the wells

The invention relates to the mining industry and is designed to overlap the axial channel of the casing bore below the perforated interval to water shut-off plantar fluid

The invention relates to the oil and gas industry, namely, devices for zonal isolation in a well at separate injection of various reagents

Mechanical packer // 2232870
The invention relates to the oil and gas industry and can be used in the operation and repair of oil wells

The invention relates to the oil and gas industry, in particular to devices for sealing the casing and disable layers
Up!