CN213176001U - Rodless oil well pump for rotary steering drilling system - Google Patents

Abstract

The utility model discloses a rodless oil-well pump for rotary steering drilling system, it includes the pump body, goes up coupling, lower coupling, ball valve, plunger subassembly, pump barrel coupling, extension nipple joint and sealing washer, characterized in that: the plunger assembly is provided with a sealing ring, the lower end of the upper coupling is connected with the upper end of the ball valve, the lower end of the ball valve is connected with the upper end of the pump cylinder, the lower end of the pump cylinder is connected with the upper end of the pump cylinder coupling, the lower end of the pump cylinder coupling is connected with the upper end of the lengthened short section, the lower end of the lengthened short section is connected with the upper end of the lower coupling, and the plunger assembly is arranged inside the pump cylinder. The utility model discloses a rodless oil pumping mode carries out crude oil swabbing work, and the energy consumption is little, efficient, the discharge capacity is big.

Description

Rodless oil well pump for rotary steering drilling system

Technical Field

The utility model relates to an oil jack for oil field pumping well, specifically speaking relates to a rodless oil-well pump for rotary steering drilling system.

Background

The existing oil-well pumps for oil exploitation mainly comprise rod pumps and tubular pumps, and the rod pumps have the problem of eccentric wear between a sucker rod and an oil pipe in the working process, so that the pump detection period is short, the energy consumption is high, and the efficiency is low. Since these problems are mostly caused by the sucker rod, an oil well pump without the sucker rod can be used, but the existing rodless pump technology is less developed and the application range is small. To this current situation, the utility model designs a no pole oil-well pump, does not have the pole pipe off-normal problem in the work, has reduced the energy consumption loss.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an oil pumping unit for oil field pumping well.

In order to achieve the above object, the utility model adopts the following technical scheme:

the utility model discloses an go up coupling, lower coupling, ball valve, plunger subassembly, pump barrel coupling, extension nipple joint and sealing washer. The plunger assembly is characterized in that a sealing ring is arranged on the plunger assembly, the lower end of the upper coupling is connected with the upper end of the ball valve, the lower end of the ball valve is connected with the upper end of the pump cylinder, the lower end of the pump cylinder is connected with the upper end of the pump cylinder coupling, the lower end of the pump cylinder coupling is connected with the upper end of the lengthened short section, the lower end of the lengthened short section is connected with the upper end of the lower coupling, and the plunger assembly is arranged inside the pump cylinder.

Furthermore, the pump cylinder is provided with a liquid inlet for crude oil to enter the oil well pump.

Furthermore, the ball valve comprises a fixed valve cover, a valve ball, a valve seat and a fixed valve seat joint, wherein the valve seat is disc-shaped, the middle part of the valve seat is provided with a circular through hole which is in seamless connection with the valve ball to prevent liquid from flowing backwards, and the upper end of the fixed valve cover is provided with two semicircular through holes for discharging liquid and blocking the valve ball.

Furthermore, the plunger assembly sequentially comprises a plug, a short plunger, a plunger joint and a long plunger from top to bottom, wherein the lower part of the long plunger is connected with a downhole linear motor, and the linear motor provides working power.

Furthermore, a plug is arranged at the upper end of the short plunger for preventing drilling fluid and well bottom impurities from entering the plunger, and sealing rings are arranged on the short plunger and the long plunger for preventing the drilling fluid from penetrating into a gap between the plunger and the pump barrel.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model discloses can realize not using the sucker rod in the oil well but by the function that linear electric motor provided power and carry out crude oil swabbing work in the pit, avoid the pole pipe eccentric wear, the big scheduling problem of energy consumption that traditional oil-well pump exists from this, carry out high efficiency, low-loss work. And simple structure has considered the friction between plunger and the pump barrel, simple to operate and long-lived.

Drawings

FIG. 1 is a schematic view of a rodless pump for use in a rotary steerable drilling system;

1-upper coupling; 2-fixing the valve cover; 3-a valve ball; 4-valve seat; 5-fixed valve seat joint; 6-plug; 7-sealing ring I; 8-short plunger; 9-mounting a pump barrel; 10-a plunger joint; 11-lower pump cylinder; 12-sealing ring II; 13-long plunger; 14-a pump barrel collar; 15-lengthening short section; 16-lower collar.

Detailed Description

The present invention is further illustrated by the following examples, which include, but are not limited to, the following examples.

As shown in fig. 1, the utility model discloses an upper coupling 1, lower coupling 16, fixed valve bonnet 2, valve ball 3, disk seat 4, fixed disk seat joint 5, end cap 6, short plunger 8, plunger joint 10, long plunger 13, upper pump barrel 9, lower pump barrel 11, pump barrel coupling 14, extension nipple 15 and sealing washer 7 and sealing washer 12. When the pump works, the underground linear motor connected with the lower end of the long plunger 13 drives the plunger and the plug 6 to move downwards to the position below the liquid inlet, so that crude oil enters the pump barrel from the liquid inlet on the pump barrel 11 under the action of pressure difference, and then the plunger 13 and the plug 6 move upwards under the action of the linear motor to push the crude oil upwards from the pump barrel. Because the ball valve is designed as a one-way valve, the crude oil can only be lifted upwards and can not flow downwards, so the crude oil can be pumped to the ground by repeating the pumping process.

The ball valve is composed of a fixed valve cover 2, a valve ball 3, a valve seat 4 and a fixed valve seat joint 5. The valve seat 4 is disc-shaped, the middle part of the valve seat is provided with a circular through hole which is in seamless connection with the valve ball 3 to prevent liquid from flowing backwards; the upper end of the fixed valve cover 2 is provided with two semicircular through holes for discharging liquid and blocking the valve ball 3; the upper end of the fixed valve seat joint 5 is connected with the lower end of the fixed valve cover 2, and the valve seat 3 is locked in the middle. The structure can realize the function of one-way flow of oil liquid in the oil pumping process.

The plunger assembly comprises a plug 6, a short plunger 8, a plunger joint 10 and a long plunger 13 from top to bottom in sequence. The surfaces of the two plungers are subjected to metal spray welding, so that the plungers have the characteristics of wear resistance, high strength and corrosion resistance. The upper end of the short plunger 8 is connected with the plug 6, and the lower end of the short plunger is connected with the plunger joint 10, so that the functions of crude oil pushing and scale scraping are realized, and meanwhile, dirt, oil and the like are prevented from entering an inner hole of the short plunger. The upper end of the long plunger 13 is connected with the plunger joint 10, the lower end is connected with a driving shaft in the linear motor, and the driving shaft drives the plunger to reciprocate up and down to realize the oil pumping function. The outer diameter of the short plunger 8 is slightly larger than that of the long plunger 13, and is in interference fit with the inner diameter of the pump barrel 9.

In order to prevent oil from entering a gap between a pump barrel and a plunger of the oil well pump and causing impurity blockage, a sealing ring 12 is arranged on the long plunger 13, and a sealing ring 7 is arranged on the short plunger 8 to ensure the normal work of the oil well pump.

The working principle of the utility model is as follows:

the utility model discloses a mainly do not use the sucker rod but use down the linear electric motor to provide power and drive the plunger upper and lower reciprocating motion and carry out crude oil pumping work. When the underground linear motor works, a driving shaft of the underground linear motor drives the long plunger 13 to further drive the short plunger 8 and the plug 6 to do up-and-down reciprocating linear motion through the plunger joint 10. When the plug 6 descends to the position below the liquid inlet, crude oil in the well enters the upper cavity of the pump barrel through the liquid inlet on the pump barrel 11 and fills the upper cavity of the pump barrel; when the plunger piston moves upwards, crude oil in the pump cylinder is pushed upwards, the one-way valve is opened under the action of pressure, and the crude oil enters the oil pipe and is pumped out of the ground. Because the ball valve is a one-way liquid inlet valve, the plunger can be closed automatically under the influence of gravity without pushing action when moving downwards, and the problems of oil backflow and incapability of swabbing are avoided. Moreover, the operation mode is less limited, so the displacement is larger. The operation is repeated in this way, and the crude oil exploitation work in the well can be completed.

The above embodiment is only one of the preferred embodiments of the present invention, and should not be used to limit the protection scope of the present invention, but all the insubstantial changes or modifications made in the spirit and the idea of the main design of the present invention, the technical problems solved by the embodiment are still consistent with the present invention, and all should be included in the protection scope of the present invention.

Claims (5)

1. The utility model provides a rodless oil-well pump for rotary steering drilling system, includes coupling, lower coupling, ball valve, plunger subassembly, pump cylinder coupling, extension nipple joint and sealing washer, its characterized in that, be provided with the sealing washer on the plunger subassembly, the lower extreme of going up the coupling with the upper end of ball valve is connected, the lower extreme of ball valve with the upper end of pump cylinder is connected, the lower extreme of pump cylinder with the upper end of pump cylinder coupling is connected, the lower extreme of pump cylinder coupling with the upper end of extension nipple joint is connected, the lower extreme of extension nipple joint with the upper end of lower coupling is connected, the plunger subassembly is inside the pump cylinder.

2. The rodless pump for a rotary steerable drilling system as in claim 1, wherein the pump barrel has an inlet port for crude oil to enter the pump.

3. The rodless pump for a rotary steerable drilling system as in claim 1, wherein the ball valve comprises a fixed valve cover, a valve ball, a valve seat, and a fixed valve seat joint, wherein the valve seat is disc-shaped, has a circular through hole in the middle, and is seamlessly engaged with the valve ball to prevent the backflow of fluid, and the fixed valve cover has two semicircular through holes at the upper end for discharging fluid and blocking the valve ball.

4. The rodless pump for a rotary steerable drilling system according to claim 1, wherein the plunger assembly comprises a choke plug, a short plunger, a plunger joint and a long plunger from top to bottom in sequence, a downhole linear motor is connected below the long plunger, and the linear motor provides working power.

5. The rodless pump for a rotary steerable drilling system as in claim 1, wherein a plug is provided at the upper end of the short plunger to block drilling fluid and downhole debris from entering the interior of the plunger, and sealing rings are provided on both the short and long plungers to prevent drilling fluid from penetrating into the gap between the plunger and the barrel.

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