Oil-well sucker-rod pumping unit

FIELD: oil and gas industry.

SUBSTANCE: invention refers to chemical and thermal treatment of a bottom-hole formation zone in developing high-viscosity oil deposits. A hollow cylinder rod is connected to a line of hollow pumping rods. A unit has also a working substance supply unit. This unit is stationary and isolated from a well production gathering line. An inside below an intake screen of the pump, between the cylinder wall and the surface of the hollow rod is divided into two sections. The cylinder rod is common for both sections and extends through a cylinder rod packing. The packing is provided between the sections. The bottom of the cylinder is connected to a tail piece with outlet holes. The tail piece comprises a hollow discharge rod. It is connected to the hollow rod of the pump. A non-return spring-loaded valve is arranged on the outlet of the hollow discharge rod of the pump.

EFFECT: unit comprises the differential sucker-rod pump, a cylinder of which is connected to a flow column; it ensures more reliable operation of the bore-hole sucker-rod pump unit and reducing serviceability.

1 dwg

 

The invention relates to the oil industry, can be used in the development of high viscosity oil, the production of which requires the application of chemical or thermal treatment of the reservoir, naplastovany, the bottomhole zone of the formation.

Known sucker-rod pumping unit patent for useful model №54404, F04B 47/02, 2010. The system includes a differential pump rod, which has associated with a column of rods differential plunger. The bottom of the plunger is made in the form of a reciprocating floating monolithic rod. The annular space enclosed between the cylinder wall and the surface of the rod, forms a working chamber of the pump with the suction valve, made in the form of coaxially with the cylinder plate with a hole through which is sealed with a mechanical seal skipped a monolithic rod. Below the suction valve set suction filter and plunger pump. The disadvantage is the complexity of the pump when the high-viscosity oil production, where the layer processing steam.

Famous oil well navstevni pump for the extraction of extra-viscous oil on the patent for useful model №90500, F04B 47/02, 2010. For the manufacture of this pump standard pump you want to cut a cylinder of us the sa into two equal parts with thread cutting on the cut. In order to increase the cross-section for the supply of steam into the reservoir to make drilling more holes on the top of the pump cylinder. Adjustment of the plunger is produced so that during operation of the pump plunger blocked the hole when the working stroke of the polished rod. Before injection of steam produced tolerance of the plunger in the lower position to open the holes. The disadvantage is the complexity of the use of a pump.

As the closest analogue of the claimed technical solution chosen well installation for the production and processing of bottom-hole formation zone under the patent for useful model №105939, E21B 47/00, 2011. The installation includes an input node of the working reagent, a column of hollow rods, located in the string of tubing, which is building the sucker rod pump. The pump consists of a hollow rod connected with a column of hollow rods. On the column tubing set packer, the hollow shaft passes through the intake valve. When moving the hollow shaft is driven by a suction valve. The disadvantage is the possibility of ingress of wellbore fluid, malapropistic sediments, mechanical impurities into the column of hollow rods during the operating mode of the pump. This reduces the reliability of the installation and increases the complexity of its service requires updat the enforcement process and dismantling equipment for cleaning. The increased complexity of installation associated with the need to install the packer to prevent working agent through the suction valve of the pump in the processing layer. In addition, when applied at the wellhead flexible high-pressure hoses for supplying the working agent into the hollow rod, there is a danger of breakage or inversion of the sleeve during processing at the working drive (the pumping unit).

The technical result of the invention is to improve the reliability of downhole equipment, oil well pumping unit and reducing the complexity of its installation and maintenance.

The technical result is achieved due to the fact that in the downhole sucker rod pump installation comprising a differential pump rod, the cylinder of which is connected with the column tubing, a rod which is connected with a column of hollow sucker rods, and the input node of the working agent, according to the invention below the receiving filter pump inner space between the cylinder wall and the surface of the hollow rod is divided into two sections, the rod pump is common to both sections and passes through the seal-type rod-cylinder, located between the sections, the lower part of the cylinder is connected with the shank of the output apertures, the shank is hollow magnetite the cent stock, connected to the hollow shaft pump, the output of the hollow injection rod pump is located opposite the spring loaded valve, the inlet node of the working agent is stationary and is separated from the line collection of products.

The technical result is ensured by the fact that at the outlet of the injection rod pump is located opposite the spring loaded valve. The valve prevents clogging of the inner channel of the hollow polished, hollow injection rod and hollow sucker rods, downhole fluid coloperatingsystems sediments, mechanical impurities during use of the pump in operation, when the hollow rod is not available worker agent for processing bottom-hole formation zone. Due to the fact that when applying the operating agent does not clog the inner space of the hollow rod, the processing layer is not required pressure rise, hollow rods do not experience additional loads. This increases the reliability of downhole sucker rod pumping unit and all downhole equipment. In addition, by installing a check valve eliminates the need for additional technological treatments for cleaning hollow sucker rods. Such processing requires dismantling of all equipment. Reduced maintenance efforts downhole equipment.

Due to t the th, lower intake filter pump inner space between the cylinder wall and the surface of the hollow rod is divided into two sections, and the stock pump is common to both sections and passes through the seal-type rod-cylinder" is excluded, the output of the working agent through the suction valve of the pump, which increases the reliability of the installation. The output of the working agent occurs through the holes in the shank, which is connected with the lower part of the pump cylinder. When this separation space of the pump and the presence of stem seal working agent enters the treatment area of the formation, and processed, liquefied downhole fluid enters into the suction valve of the pump through the suction filter. This embodiment prevents the installation of the packer to separate functional zones of borehole installation, which facilitates Assembly and disassembly of all equipment, reduces the complexity of the work.

In wellhead equipment isolation flow inlet node of the working agent is separated from the crop, resulting in the flow of the well fluid flowing from the tubing at the wellhead, not mixed with the flow of the working agent, coming from the mouth in a column of hollow sucker rods. The node separation of threads executed in the rigid version, there is no flexible high-pressure hose. The node at ditsa under the mouth inside the well, which increases the reliability of the equipment as a whole. The host is running, enter the working agent fixed simplifies the Assembly and disassembly of the hard pipe for the supply of the working agent to a mouth.

The figure presents the downhole sucker rod pump installation.

Well sucker-rod pumping system includes equipment wellhead isolation flows, consisting of a node entering the working agent 1 and line collection of products 2, differential pump rod comprising a hollow polished rod 3, the cylinder 5, the injection valve 6, the suction valve 7, the plunger 17, the receiving filter 8. Polished rod 3 from the top is connected with a column of hollow sucker rods 9, the cylinder 5 of the pump in the upper part is connected with the column tubing 10. The inner space of the pump divided by a partition 11 into two sections, between which set the seal 12 of the polished rod 3. The pressure rod 4, which consists of a special hollow rod attached the nipple to a hollow rod of the pump 3. At the end of the injection rod 4 has a reverse spring-loaded valve 13. To the bottom of the pump cylinder 5 is attached to the shank 14 with holes 15 of the output filter. In the casing of the well at the location of the productive formation executed the perforations 16. Well sucker-rod pumping setup is and works as follows.

The column tubing set differential pump rod, to the lower part of the cylinder 5 of the pump is attached to the shank 14 of the tubing with an output filter with holes 16. The pressure rod 4, consisting of the required number of special hollow rod, attach the nipple to a hollow rod of the pump 3. For Assembly of the injection rod and attach it to a hollow shaft pump 3 use the nipple, this rod internal thread on the nipple - outer. This gives you the opportunity to skip injection 4 and the hollow rod 3 inside the differential pump. From ground drive, which can serve as a conventional pumping unit, chain drive or a hydraulic drive transfers energy to the movement of the plunger 17 of the pump, using a column of hollow sucker rods 9. In the pump using a special design of the saddle-plate" 7 suction and discharge 6 valves, which allows you to place the hollow rod 3 inside the pump and the pressure rod 4 to be mounted below the pump. Forced opening-closing 7 suction and discharge 6 of the valve rod of the differential pump prevents them from freezing when high-viscosity oil production. For pumping high viscosity of the downhole product in the bottomhole formation zone, stratiform and naplastovany zone, below the plant and pump serves the worker agent for chemical or thermal processing for the liquefaction product. Before beginning processing block valve on-line collection of products 2 to increase the pressure to the specified level. Mount the high-pressure hose or manifold, connecting the valve Assembly with the reagent and the input node of the working agent 1. Then, through the input node of the working agent 1 equipment wellhead isolation flow pump under davlenym working agent, which is a chemical reagent, or superheated steam in a string of hollow sucker rods 9. If necessary, the equipment produced in the heat-resistant performance. On the hollow polerowanie the rod 3 and the discharge rod 4 working agent is fed into the area below the pump, and through the holes 15 of the output filter of the shank 14 and openings 16 in the casing enters the processing zone. The processing result is the dilution of the downhole viscosity of the product. After injection of estimated volume of the working agent in the treatment area of the formation, and after a predetermined reaction time working agent high-pressure hose or manifold is removed, and the input node of the working agent 1 install the cover and open the valve on-line collection of products 2. A well run operation. Processed working medium is liquefied oil enters the pump through the suction filter 8 and then the column - tubing - in-line collection about the products 2.

Technical solution allows to increase the efficiency and speed of processing bottom-hole formation zone working agent, to supply the working agent in the specified area of the processing, to reduce the flow of the agent through the use of hollow sucker rods 9 and exclude the operations of lowering and lifting of deep pumping equipment at each layer processing.

Thus, the invention improves the reliability of downhole equipment and reduce maintenance efforts downhole sucker rod pumping units.

Oil well pumping installation comprising a differential pump rod, the cylinder of which is connected with the column tubing, a hollow rod which is connected with a column of hollow sucker rods, and the input node of the working agent, characterized in that below the receiving filter pump inner space between the cylinder wall and the surface of the hollow rod is divided into two sections, the rod pump is common to both sections and passes through the seal-type rod-cylinder, located between the sections, the lower part of the cylinder is connected with the shank of the output hole in the shank is hollow injection rod, connected to the hollow shaft pump, the output of the hollow injection rod pump is reverse podrugi the military valve, the input node of the working agent is stationary and is separated from the line collection of products.



 

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FIELD: mining.

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3 cl, 3 dwg

FIELD: oil and gas industry.

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EFFECT: improving production efficiency due to temperature impact on the produced oil well fluid.

2 cl, 1 dwg

FIELD: oil and gas industry.

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4 cl, 2 dwg

FIELD: oil extractive industry.

SUBSTANCE: method includes lowering a tail piece into well with temperature, electric conductivity and pressure sensors placed on tail piece along its length. Pressure sensors are used in amount no less than three and placed at fixed distances from each other. After that, continuously during whole duration of well operation between maintenance procedures, temperature, conductivity of well fluid, absolute value of face pressure and difference of pressures along depth of well in area of productive bed are recorded. Different combinations of pairs of pressure sensors are used for determining special and average values of well fluid density. When absolute pit-face pressure is lower then saturation pressure for well fluid by gas and/or when average values of density deviate from well fluid preset limits and/or when its conductivity deviates from preset limits, adjustment of well operation mode is performed.

EFFECT: higher efficiency, higher safety.

2 cl

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