CN100570156C - Self-refluxing single flow valve for oil-submersible electric pump - Google Patents

Abstract

A kind of self-refluxing single flow valve for oil-submersible electric pump.Mainly solve the one-way valve of existing Electric Submersible Pump Unit outlet connection and the problem of oil drain valve switch weak effect.It is characterized in that: have the oilhole that leaks (4) on the wall of valve body (1) middle and upper part, valve body (1) is built-in with the spool (5) of inside and outside band shape step, spool (5) reducing end up and down places respectively in the upper connection (3) and lower contact (2) of valve body (1), have oil inlet hole (6) on spool (5) lower part wall, have and corresponding internal drainage hole, draining hole (4) (7) on spool (5) top wall, there is valve ball (8) at the interior ring-shaped step of spool (5) seat of honour, is connected with the valve ball baffle plate (9) of the oily passage of band stream in the upper connection (3).This self-refluxing single flow valve for oil-submersible electric pump has one-way valve and oil drain valve switch good effectiveness.

Description

Self-refluxing single flow valve for oil-submersible electric pump

Technical field:

The present invention relates to submersible electric pump used one-way valve, especially self-refluxing single flow valve for oil-submersible electric pump in the oil recovery field, oil field.

Background technique:

Along with Oilfield developing, the submersible electric pump technology is in continuous development, to adapt to the needs of different productive lives.Electric Submersible Pump Unit outlet at present connects one-way valve and two parts of oil drain valve; the one-way valve of pump discharge is opened and is made well liquid give rise to ground during startup of unit; utilizing during compressor emergency shutdown gives up breaks the oil drain valve spool and makes that well liquid goes out from the draining orifice flow in the tubing string, and two kinds of valves work independently.When unit is operated in when containing sand drain, compressor emergency shutdown and when not requiring draining, the sand grains that contains in the sand drain liquid in the oil pipe can be deposited in the oil pipe on one-way valve top, to making unit starting difficulty once more.When unit is operated in thick oil well, compressor emergency shutdown and when requiring draining, because the thick oil well fluid viscosity is bigger, the whereabouts resistance of giving up is bigger to making, rate of descent is slow, and it is disconnected that the draining spool is not easy to pound, and the well liquid in the oil pipe can not release, and can't play well.

Summary of the invention:

Export the one-way valve of connection and the deficiency of oil drain valve switch weak effect in order to overcome existing Electric Submersible Pump Unit, the invention provides a kind of self-refluxing single flow valve for oil-submersible electric pump, this self-refluxing single flow valve for oil-submersible electric pump has one-way valve and oil drain valve switch good effectiveness.

Technological scheme of the present invention is: this self-refluxing single flow valve for oil-submersible electric pump comprises that upper and lower end has the valve body of upper connection and lower contact respectively, valve body is built-in with the spool of inside and outside band shape step, spool reducing end up and down places respectively in the upper connection and lower contact of valve body, spool can move up and down in the upper connection of valve body, valve body and lower contact, under the spool reducing end with the comparison major path is arranged between lower contact cooperates, well liquid can unimpededly be flowed; Have the oilhole that leaks on the wall of valve body middle and upper part, have oil inlet hole on the spool lower part wall, have on the spool top wall and the corresponding internal drainage of the oilhole that leaks hole, there is valve ball at the ring-shaped step seat of honour in the spool, during the Electric Submersible Pump Unit starting, well liquid promotes to move on the spool, and the oilhole that leaks is sealed by the sealing surface of spool and closed the draining passage, well liquid again under the spool passage between reducing end and lower contact and oil inlet hole enter and promote ball valve in the spool and move so that ball valve is opened; When Electric Submersible Pump Unit was shut down, spool and ball valve fell, and leak oilhole and internal drainage hole align, and the draining passage is opened, and spool and ball valve are closed the feed liquor runner; Be connected with the valve ball baffle plate of the oily passage of band stream in the upper connection.

The beneficial effect that the present invention has is: this self-refluxing single flow valve for oil-submersible electric pump promotes spool wander up and down in valve body owing to adopted such scheme by well liquid, realizes two big functions of liquid one-way flow and automatic draining.And enlarged the application area of Electric Submersible Pump Unit, improved the Electric Submersible Pump Unit conformability.Electric Submersible Pump Unit is applied to and contains in the sand drain, make Electric Submersible Pump Unit not produce sand plug, be applied in the thick oil well, solve the draining spool and be not easy breakage problem, improved one-way valve and oil drain valve switch effect, thereby reduced the inspection pump frequency, also with regard to the corresponding cost for oil production that reduced, and Electric Submersible Pump Unit is when playing machine continuously, and starting power is little, be easy to the machine that rises continuously of unit, and structure is simple relatively.This self-refluxing single flow valve for oil-submersible electric pump has one-way valve and oil drain valve switch good effectiveness thus.

Description of drawings:

Accompanying drawing 1 is a structural representation of the present invention.

1-valve body among the figure, 2-lower contact, 3-upper connection, the 4-oilhole that leaks, 5-spool, 6-oil inlet hole, 7-internal drainage hole, 8-valve ball, 9-valve ball baffle plate.

Embodiment:

Below in conjunction with accompanying drawing will the invention will be further described:

Shown in accompanying drawing, this self-refluxing single flow valve for oil-submersible electric pump comprises that upper and lower end has the valve body 1 of upper connection 3 and lower contact 2 respectively, has the oilhole 4 that leaks on the valve body 1 middle and upper part wall, drains well liquid in the tubing string by the oilhole 4 that leaks when compressor emergency shutdown; Valve body 1 is built-in with the inside and outside barrel-shaped spool 5 of band shape step, spool 5 and can be in valve body moving up and down in 1, spool about in the of 5 the reducing end insert in respectively in the upper connection 3 and lower contact 2 of valve body 1, spool 5 also can move up and down in upper connection 3 and lower contact 2, spool 5 is set upright by upper connection 3 and lower contact 2,5 times reducing ends of spool with the comparison major path is arranged between lower contact 2 cooperates, well liquid can unimpededly be flowed; Have oil inlet hole 6 on spool 5 lower part walls, when the unit proper functioning, well liquid enters in the spool 5 from oil inlet hole 6; The oilhole 4 corresponding internal drainage holes 7 that have on spool 5 top wall and leak when compressor emergency shutdown, by cooperating of leak oilhole 4 and internal drainage hole 7, reach the purpose of draining well liquid in the tubing string; There is valve ball 8 at the ring-shaped step seat of honour in the spool 5, is connected with the valve ball baffle plate 9 of the oily passage of band stream in the upper connection 3, when the unit proper functioning, removes on the valve ball 8 and opens, and be subjected to the control of valve ball baffle plate 9, limits valve ball 8 the sphere of activities.

During actual the use, at first this self-refluxing single flow valve for oil-submersible electric pump is installed in the Electric Submersible Pump Unit outlet port, during the Electric Submersible Pump Unit starting, well liquid promotes spool 5 and moves from spool 5 lower ends, the oilhole 4 that leaks staggers 0 with internal drainage hole 7, the oilhole 4 that leaks is sealed by the sealing surface of spool 5 and is closed the draining passage, well liquid enters in the spool 5 from the passage and the oil inlet hole 6 of 2 of 5 times reducing ends of spool and lower contacts more then, well liquid promotes to move on the ball valve 8 once more, ball valve 8 is opened, well liquid enters in the oil pipe smoothly by the runner of upper connection 3 and ball valve baffle plate 9, and well liquid is given rise to ground by oil pipe, the Electric Submersible Pump Unit proper functioning.When Electric Submersible Pump Unit is shut down; under the effect of the well liquid in oil pipe and the deadweight of spool 5; spool 5 and ball valve 8 are fallen; drop to when the location is located on the lower end step in the valve body 1, the oilhole 4 that leaks aligns with internal drainage hole 7, and the draining passage is opened; spool 5 and ball valve 8 are closed the feed liquor runner; well liquid is ended by spool 5 and ball valve 8, and the well liquid in the tubing string in time releases from leak oilhole 4 and the internal drainage hole 7 of valve body 1 and spool 5, and well liquid enters oil sets annular space.Realize two big functions of liquid one-way flow and automatic draining thus.And enlarged the application area of Electric Submersible Pump Unit, improved the Electric Submersible Pump Unit conformability.Electric Submersible Pump Unit is applied to and contains in the sand drain, make Electric Submersible Pump Unit not produce sand plug, be applied in the thick oil well, solve the draining spool and be not easy breakage problem, improved one-way valve and oil drain valve switch effect, thereby reduced the inspection pump frequency, also with regard to the corresponding cost for oil production that reduced, and Electric Submersible Pump Unit is when playing machine continuously, and starting power is little, be easy to the machine that rises continuously of unit, and structure is simple relatively.This self-refluxing single flow valve for oil-submersible electric pump has one-way valve and oil drain valve switch good effectiveness thus.

Claims (1)

1, a kind of self-refluxing single flow valve for oil-submersible electric pump, comprise that upper and lower end has the valve body (1) of upper connection (3) and lower contact (2) respectively, it is characterized in that: valve body (1) is built-in with the spool (5) of inside and outside band shape step, spool (5) reducing end up and down places respectively in the upper connection (3) and lower contact (2) of valve body (1), spool (5) can move up and down in the upper connection (3) of valve body (1), valve body (1) and lower contact (2), between spool (5) descends the reducing end and lower contact (2) cooperates the comparison major path is arranged, well liquid can unimpededly be flowed; Have the oilhole that leaks (4) on the wall of valve body (1) middle and upper part, have oil inlet hole (6) on spool (5) lower part wall, have and the oilhole that leaks (4) corresponding internal drainage hole (7) on spool (5) top wall, there is valve ball (8) at the interior ring-shaped step of spool (5) seat of honour, during the Electric Submersible Pump Unit starting, well liquid promotes to move on the spool (5), the oilhole (4) that leaks is sealed by the sealing surface of spool (5) and is closed the draining passage, and the passage between reducing end and lower contact (2) and oil inlet hole (6) enter that promotion ball valve (8) moves so that ball valve (8) is opened in the spool (5) to well liquid down from spool (5) again; When Electric Submersible Pump Unit was shut down, spool (5) and ball valve (8) fell, and the oilhole that leaks (4) aligns with internal drainage hole (7), and the draining passage is opened, and spool (5) and ball valve (8) are closed the feed liquor runner; Be connected with the valve ball baffle plate (9) of the oily passage of band stream in the upper connection (3).

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