CN205422646U - Empty core rod closed hot -water circulation heating viscosity reduction device in charge pump oil recovery well - Google Patents

Abstract

The hollow rod closed-type hot water circulation heating viscosity reduction device in the electric pump oil production well. The oil outlet cross is installed on the casing and the oil pipe. The upper part of the oil pipe is connected with the oil outlet cross. Install the retaining pipe joint between the pump units. Connect the retaining joint at the bottom of the hollow pipe. There is a water return interface on the side of the hollow tube, and the coiled tube is inserted into the hollow tube. The upper part of the coiled tube is fitted with a seat cover. The coiled tube and the seat cover are welded together. The seat cover sits on the upper end of the suspension joint. The joint is set outside the gasket and the seat cover. The lower part of the water inlet joint is connected to the upper part of the suspension joint. There is a water inlet interface on the side of the water inlet joint. The water circulation transfers the heat of the mixed hot water to the heavy oil in the oil pipe.

Description

Hollow Rod Closed Hot Water Circulation Heating Viscosity Reduction Device in Electric Pump Production Well

technical field

The utility model is a device used for oil production wells in oil fields, and is a viscosity reducing device used when electric pumps exploit heavy oil, in particular to a hollow rod closed-type hot water circulation heating viscosity reduction device in electric pump oil production wells.

Background technique

Some oil production wells in the oil field use electric pumps to pump oil, and electric pumps use downhole motors to drive downhole centrifugal pumps to rotate, pressurize the downhole crude oil to lift it to the ground, and the downhole pipes for electric pump oil production are composed of oil pipes, centrifugal pumps, and motors , The centrifugal pump and the motor are connected by thousands of meters of tubing and lowered into the well. The extracted crude oil flows to the ground through the inner hole of the tubing. The diameter of the inner hole of the tubing is Φ62mm. When the electric pump is lowered into the heavy oil well to produce oil, due to the poor fluidity of the heavy oil, the large flow resistance, and the large pressure difference from the wellhead to the pump end, the discharge pressure of the electric pump is high, the motor load is large, and the energy consumption is high. The centrifugal pump of the electric pump Low efficiency, low oil well production, high power consumption, and poor economic benefits. When the viscosity of heavy oil is too high, the oil flow channel will be blocked, the downhole motor will be overloaded, and the motor will be burned, causing major economic losses.

Contents of the invention

The purpose of this utility model is to solve the existing problems of electric pumps on heavy oil wells, and design a closed-type hot water circulation heating and viscosity reduction device for hollow rods in oil production wells with electric pumps, so that the heavy oil pumped out by electric pumps can be heated to reduce viscosity and increase flow. It can reduce the outlet pressure of the electric pump, improve the efficiency of the electric pump, reduce the energy consumption of oil wells, and improve economic benefits.

The purpose of this utility model is achieved in the following way: including the oil outlet spool, wellhead device, casing, oil pipe, electric pump unit, the oil outlet spool is installed on the casing and the oil pipe, the oil pipe is in the casing, the upper part of the oil pipe and the outlet The oil is connected in four directions, the electric pump unit is installed at the lower part of the oil pipe, the pipe stop joint is installed between the oil pipe and the electric pump unit, the stop joint is connected at the bottom of the hollow pipe, the hollow pipe is lowered into the oil pipe, and the upper part of the hollow pipe is connected to the suspension The lower part of the joint, the suspension joint is connected to the upper part of the oil outlet spool, the side of the suspension joint has a water return interface, the coiled tube is inserted into the hollow tube, the upper part of the coiled tube is fitted with a seat cover, the coiled tube and the seat cover are welded together, and the seat The sleeve sits on the upper end of the suspension joint, the seat cover is equipped with a gasket, the water inlet joint is set outside the gasket and the seat cover, the lower part of the water inlet joint is connected with the upper part of the suspension joint, so that the inner shoulder of the water inlet joint presses the seal pad, the side of the water inlet joint has a water inlet interface, and the upper part of the water inlet joint is closed.

The beneficial effects of the utility model are: the mixed medium enters from the water inlet interface, flows downward through the continuous tube, then flows upward through the annular channel between the continuous tube and the hollow tube, and flows out from the water return interface, forming a closed circulation of hot water , so that the heat of the mixed hot water is transferred to the heavy oil in the oil pipe, so that the heavy oil pumped out by the electric pump is heated to reduce the viscosity, increase the fluidity, reduce the outlet pressure of the electric pump, improve the efficiency of the electric pump, reduce the energy consumption of the oil well, and improve the economy. Benefits, therefore, the utility model solves the existing problems of electric pumps in heavy oil exploitation, and has significant economic benefits.

Description of drawings

Fig. 1 is the assembly drawing of the utility model embodiment.

detailed description

Below in conjunction with Fig. 1 the embodiment of the present utility model is described.

It can be seen from Figure 1 that the embodiment of the utility model includes a plug 1, a water inlet joint 2, a gasket 4, a seat cover 6, a suspension joint 8, a coiled tubing 10, an oil outlet spool 11, a hollow pipe 12, and a wellhead device 13 , casing 14, blocking joint 15, oil pipe 16, blocking pipe joint 17, electric pump unit 18, oil outlet cross 11 is installed on casing 14, oil pipe 16, oil pipe 16 is in casing 14, the upper part of oil pipe 16 Connected with the oil outlet four-way 11, the electric pump unit 18 is installed at the lower part of the oil pipe 16, and the retaining pipe joint 17 is installed between the oil pipe 16 and the electric pump unit 18. The hollow tube 12 is used to prevent the hollow tube 12 from falling into the electric pump unit 18 after being disconnected, so as to prevent the electric pump unit 18 from being damaged, and a blocking joint 15 is connected to the bottom of the hollow tube 12 to prevent the coiled tubing 10 from falling into the oil management system 6, the blocking joint 15 can ensure that the bottom of the coiled tubing 10 is blocked, even if the coiled tubing 10 falls on the blocking joint 15, the hot water circulation channel still exists, the hollow pipe 12 is lowered into the oil pipe 16, and the hollow pipe 12 The upper part is connected to the lower part of the suspension joint 8, and the suspension joint 8 is connected to the upper part of the oil outlet spool 11. The connection method is generally a clamp connection. The side of the suspension joint 8 has a return water interface 9, which can be connected to the return water line. 12 into the coiled tube 10, the upper part of the coiled tube 10 sets the seat cover 6, the coiled tube 10 and the seat cover 6 are welded together, the seat cover 6 sits on the upper end of the suspension joint 8, the seat cover 6 is installed with the gasket 4, and the The water joint 2 is set outside the sealing gasket 4 and the seat cover 6, the water inlet joint 2 covers the upper end of the continuous pipe 10, and the lower part of the water inlet joint 2 is threadedly connected with the upper part of the suspension joint 8 (the connection is guaranteed to be sealed), so that the water inlet The inner shoulder of joint 2 presses gasket 4, and the side of water inlet joint 2 has water inlet interface 3, can connect water inlet pipeline, and the top of water inlet joint 2 is closed, and the top of water inlet joint 2 is closed by plug 1.

The mixed medium is hot water produced by the wellhead boiler. The hot water enters from the water inlet port 3, flows downward through the coiled tube 10, then flows upward through the annular channel between the coiled tube 10 and the hollow tube 12, and flows out from the return water port 9. , so that the heat of the mixed hot water is transferred to the heavy oil in the oil pipe, so that the heavy oil pumped out by the electric pump is heated to reduce the viscosity, increase the fluidity, reduce the outlet pressure of the electric pump, improve the efficiency of the electric pump, and reduce the energy consumption of the oil well.

The hollow pipe is also a hollow sucker rod used on site, also known as a hollow rod.

Claims (2)

1. A hollow rod closed-type hot water circulation heating viscosity reduction device in an electric pump oil production well, including an oil outlet cross (11), a wellhead device (13), a casing (14), an oil pipe (16), and an electric pump unit ( 18), the oil outlet spool (11) is installed on the casing (14) and the oil pipe (16), the oil pipe (16) is in the casing (14), and the upper part of the oil pipe (16) is connected to the oil outlet spool (11) In the same way, the electric pump unit (18) is installed at the lower part of the oil pipe (16), and its feature is: a retaining pipe joint (17) is installed between the oil pipe (16) and the electric pump unit (18), and at the bottom of the hollow pipe (12) Connect the blocking joint (15), the hollow pipe (12) is lowered into the oil pipe (16), the upper part of the hollow pipe (12) is connected to the lower part of the suspension joint (8), and the suspension joint (8) is connected to the oil outlet cross ( 11), the side of the suspension joint (8) has a water return interface (9), and the coiled tube (10) is lowered into the hollow tube (12), and the upper part of the coiled tube (10) is fitted with a seat cover (6), and the continuous The pipe (10) and the seat cover (6) are welded together, the seat cover (6) sits on the upper end of the suspension joint (8), the gasket (4) is installed on the seat cover (6), and the water inlet joint (2) is set on Outside the gasket (4) and seat cover (6), the lower part of the water inlet joint (2) is connected to the upper part of the suspension joint (8), so that the inner shoulder of the water inlet connector (2) presses the gasket (4), A water inlet interface (3) is arranged on the side of the water inlet connector (2), and the upper part of the water inlet connector (2) is closed. 2. The hollow rod closed-type hot water circulation heating viscosity reduction device in the electric pump oil production well according to claim 1, characterized in that: the upper part of the water inlet joint (2) is closed by a plug (1).