Device for dosing of the reagent in the well

 

The invention relates to the oil industry and can be used for oil extraction. Device for dosing of the reagent in the well includes a container for the reagent with the separator, metering site with valve, annular channel of variable length for the metered release of the reagent. The valve is made in the form of rigidly connected valve, stem and disk. The disc is mounted on the piston rod can be moved and driven by a fluid flow, suction pump. The disk is placed in the sleeve tapered section with smooth changes its lifting force and lifting the valve stem during the course of the plunger pump up. Increased efficiency and reliability. 1 C.p. f-crystals, 1 Il.

The invention relates to the oil industry and can be used in oil production.

The most effective use of chemicals in oil production to increase the efficiency of the technological process is the introduction of the reagent prior to pump deep in the hole, i.e. at the beginning of the movement neptunomonas mixture in the pump-compressor pipe.

A device for dosed supply of the reagent into the well, boom equipped with a separator in the form of a float made of a hollow cylinder, filled with liquid of density that provides buoyancy in the reservoir fluid. The dosage of the reagent occurs only when the pump in the well.

The disadvantage of this device is that the separator used is a float, with a small difference of the partial densities of the liquids does not work reliably, as can be displaced from the liquid-liquid interface.

A device for dosed supply of the reagent in the well (patent RF №2132930, CL 6 E 21 In 37/06, published 10.07.99), containing the container for the reagent with the separator, metering site with valve, made in the form of rigidly connected valve, stock and two discs - large and small, driven from the differential pressure developed by the suction of the pump, and the channel for the metered release of the reagent is an annular channel of variable length, which is formed by placing the end of the rod in the form of a thin cylindrical rod in the cylindrical hole of the valve seat. Annular channel variable length allows you to adjust the dosage of a reagent in a wide range of changes.

The disadvantage is unreliable work site hoist valve stem, sostojavshegosa of the two under the in in the fluid flow changes abruptly and disrupted the smooth movement of the valve stem, reduced reliability of dosing the reagent.

To improve the reliability and efficiency, ensuring the most varied operating conditions of oil-producing wells in the known device for dosing a reagent into the well containing the container for the reagent with the separator, metering site with valve, made in the form of rigidly connected valve stem / stem disc stem can be moved and driven by the fluid flow, suction pump, the annular channel of variable length for the metered release of the reagent according to the invention it is provided with a sleeve tapered section, hosting the drive with the possibility of gradual change its lifting force and lifting the valve stem during the course of the plunger pump up the bottom of the container for the reagent equipped with check valve, and a separator made in the form of multi-cuffs.

Placement drive for lifting the rod in the sleeve tapered section provides smooth and reliable operation of the valve when the pump well.

The separator in the form of multi-cuff prevents the mixing of the chemicals entering the container, the reservoir fluid. The use of such a liquid separator.

Diagram of the device shown in the drawing. The device consists of a dosing unit, a container for the reagent and the separator. Dosing node includes a housing 1 with Windows 2, a valve 3, valve 4, shaft 5, disk 6, the sleeve tapered section 7, supports the guide rod 8, the limiter control stroke of the piston rod 9. The container for the reagent includes a bottom 10 with a check valve 11, the tubing 12 of the required length, the clutch 13 for connecting pipes. The separator consists of a body 14 and cuffs 15.

The device is assembled and operates as follows.

The device of the individual nodes is collected directly at the wellhead before descending into the well. The bottom 10 with a check valve 11 warachit pump tubing. In this tube with the bottom side is placed a separator consisting of a body 14 and the cuff 15. Pipe with bottom hung at the wellhead and then collect the required column length of the pipes, connecting them couplings 13, as a container for the reagent. After ruffles container pour the reagent through the open end of the pipe at the wellhead. When this check valve 11 on the bottom 10 of the container is closed and the reagent stored in the container. Next to the container connect the acceptable dosage of the reagent by changing the position of the limiter-regulator stroke of the piston rod 9 and the bearings of the guide rod 8, adjusts the speed of the disk 6 in the sleeve tapered section 7 with regard to the flow rate by changing the position of the nuts on the rod 9 above disc 6. The adjusting work is performed in accordance with the data obtained by the test bench simulating the operation of the device in the well.

To the dosing site by using the clutch 13 is connected to the pump and then it all falls through connection pipes and bars to the estimated level in the well. When the pump starts dosing of the reagent in stratiform liquid before the pump. The displacement of the reagent from the container occurs due to the pressure drop in the annulus and the container with the reagent on the output level of the reagent from the container. The differential pressure is created due to the different values of the density of the reservoir fluid and the reagent.

The capacity of the container is determined by the flow rate of the reagent and time well before the next filling of the container with the reagent. If necessary, the filling of the container with the reagent are lifting operation of all equipment in the well, and the container is again filled with reagent, and made the necessary adjustment of the dosing device.

The placement of the disk 6 in the sleeve conra pump up, that is, when the suction reservoir fluid, and allows the dosage of a reagent in normal mode, creates conditions for reliable operation of the metering device.

The execution of the separator in the form of multi-cuff ensures reliable operation of the separator in all sizes patootey reagent and the reservoir fluid. Multiple cuff eliminates the possibility of the cuff on the joints of the pipes, as when hit single stage ribbed pipe joint other steps sleeves provide the desired performance of the separator inside the container for the reagent. This separator moves behind the reagent when it spending due to the pressure differential above and below the separator, and not due to buoyancy as float separator, so the separator in the form of multi-cuff works reliably and when under the separator liquid density less than the density of the reagent above the separator. The weight of the separator must be less than the friction force cuffs on the wall of the container, to prevent subsidence of the separator in the liquid in the container. This possibility dosing device can be used in cases of substitution reagent oil through the bottom hole of the container is disorder, provides a given dosage of a reagent in various operating conditions of oil production wells.

Claims

1. Device for dosing of the reagent in the well, comprising a container for the reagent with the separator, metering site with valve, made in the form of rigidly connected valve stem / stem disc stem can be moved and driven by the fluid flow, suction pump, the annular channel of variable length for the metered release of the reagent, characterized in that it is provided with a sleeve tapered section which is placed in the drive with the possibility of gradual change its lifting force and lifting the valve stem during the course of the plunger pump up.

2. The device under item 1, characterized in that the bottom of the container for the reagent equipped with check valve, and a separator made in the form of multi-cuff.

 

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