CN1325798C

CN1325798C - Permanently-non-plugging oil well pump sand-filtering machine

Info

Publication number: CN1325798C
Application number: CNB011279265A
Authority: CN
Inventors: 王华超; 王汝林
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-07-10
Filing date: 2001-07-10
Publication date: 2007-07-11
Anticipated expiration: 2021-07-10
Also published as: CN1395043A

Abstract

The present invention relates to a sand filtering machine for an oil well pump, which can not be blocked permanently and is composed of a stator, a rotor and an energy storage spring for the rotor, wherein the stator is formed by the orderly connection of a driving cylinder, an outer shell in which a plate brush is arranged, a transition joint and a silt collector; the rotor is formed by the orderly connection of a driving plunger, an inner barrel provided with a filtering screen, and a float valve. An oil pump plunger rises, and the rotor rises because of the lifting force formed by the resistance force of the filtering screen; the oil pump plunger falls, the lifting force disappears, the rotor falls back, the filtering screen is intermittently brushed forward and backwards by the plate brush, and the brushed silt sinks into the silt collector along a sinking channel. The sand filtering machine has high filtration accuracy, is not blocked permanently, extends the operation cycle of the oil pump and saves the operation cost.

Description

The oil well pump sand-filtering machine

1. technical field

The present invention relates to a kind of oil well pump sand-filtering machine of field of petroleum exploitation.

2. technical background

At present, in order to protect oil well pump, the husky anchor that stops silt is set below pump, husky anchor often stops up, particularly rocky oil field.Stop up for delaying husky anchor, often select the large aperture filter screen, owing to the filter precision difference silt holddown occurs or sand buries.No matter be that husky anchor stops up or holddown, all need pump and husky anchor are mentioned aboveground, operation is frequent, expense is expensive.July 14 in 1999 order, I once proposed to have the husky anchor scheme of washing the net function automatically, did not have production because of not possessing implementation.

3. summary of the invention

The object of the present invention is to provide a kind of crude oil filtrating equipment that adapts to oil well pump in the long-term continuous operation in down-hole---oil well pump sand-filtering machine.

The object of the present invention is achieved like this.A kind of oil well pump sand-filtering machine is made up of the rotor and the rotor energy-storing spring of static stator, motion, and rotor is installed among the stator, and rotor energy-storing spring one end connects rotor, and the other end connects stator; The internal thread that is connected with the oil well pump oil pipe is established in stator drive cylinder upper end, the lower end outside thread is threaded with the stator casing head end that the upper end has the shell oil inlet passage, establish a plurality of brush grooves in the stator casing, in the brush groove scrubbing brush and scrubbing brush spring are installed, establish a plurality of brush grooves in the stator casing, in the brush groove scrubbing brush and scrubbing brush spring are installed, the stator casing tail end connects to form static stator through transition joint and silt trap; The rotor driven plunger supports and to be connected with the rotor inner core head end of inner core oil inlet passage with having spiral, and filter screen is contained on the rotor inner core, and the tail end of rotor inner core is established the rotor of floating valve component movement; Stator casing constitutes the silt sinking passage that is communicated with the silt trap with filter screen.When oil pump plunger piston descends, rotor falls to lower limit, rotor energy-storing spring stores rotor gravity potential energy, when oil pump plunger piston oppositely rises, as long as the sub-fraction of overcome friction and rotor gravity, rotor just rises to upper limit with oil pump plunger piston to the rotor that the filter screen pressure difference forms, and treats that oil pump plunger piston rises to peak to uplift force, rotor disappears to uplift force, and rotor gravity overcome friction and spring force fall to lower limit.Rotor is followed lifting operation up and down in stator of taking out pump plunger, be subjected to the scrubbing brush spring action in the stator brush groove, contact good scrubbing brush with filter screen and back and forth scrub filter screen, sunk to the silt trap by the silt under brushing along the silt sinking passage and accumulate, the outer sediment concentration of filter screen keeps stable.

Owing to adopt such scheme, can select the filter screen protection oil well pump that satisfies the requirement of oil well pump filter precision for use,

Stop silt to enter oil well pump effectively, improve pump efficiency, prolong the operation period of oil well pump.Save expensive operation cost, boost productivity.

4. description of drawings

The present invention is further described below in conjunction with accompanying drawing.

Fig. 1 is a first embodiment of the invention general structure schematic representation.

Fig. 2 is a second embodiment of the invention general structure schematic representation.

Among the figure: 1. stator 2. rotors 11. stator driving cylinders 12. stator casings 13. scrubbing brush supports 14. brush grooves 15. scrubbing brushes 16. scrubbing brush springs 17. shell oil inlet passages 18. transition joints 19. silt collectors 20. inner core oil inlet passages 21. rotor inner cores 22. screen packs 23. screen pack spiral supports 24. rotor actuation plunger 25. buoyancy spools 27. spools keep off 28. oily husky secondary separation tube 29. sealing covers 31. rotor stretching energy-stored springs 32. rotor compression energy-stored springs.

5. embodiment

As Fig. 1,2, shown in, sand-filtering machine is made up of stator (1), rotor (2) and rotor energy-storing spring, rotor (2) is installed in the stator (1); The internal thread that is connected with the oil well pump oil pipe is established in stator drive cylinder (11) upper end, the lower end outside thread is threaded with the stator casing with shell oil inlet passage (17) (12) head end, stator casing (12) constitutes a plurality of brush grooves (14) with scrubbing brush support (13), scrubbing brush (15) and scrubbing brush spring (16) are installed in the brush groove (14), and stator casing (12) tail end connects to form static stator through transition joint (18) and silt trap (19); Rotor driven plunger (24) is connected with rotor inner core (21) head end with inner core oil inlet passage (20), establish on the rotor inner core (21) and increase effective filtration area and prevent that the spiral of filter screen distortion from supporting (23), filter screen (22) supports (23) through spiral and is contained on the bobbin in the rotor (21), and the tail end of rotor inner core (21) is established opening when arranging sand, all the other are rotors of the floating valve component movement of normally off; Floating valve is by the spool of bottom retaining (27), the valve seat on top (25) and form near the spool (26) of valve seat (25); Filter screen (22) constitutes the silt sinking passage that is communicated with silt trap (19) with stator casing (12).

As shown in Figure 1, rotor energy-storing spring (31) adopts cylindroid helicalcoil extension spring, is installed on rotor (2) top, and the spring lower end is connected with rotor (2), and the upper end is connected with stator (1).

As shown in Figure 2, rotor energy-storing spring (3) adopts cylindroid helicalcoil compression spring, is installed on rotor (2) bottom, and the spring upper end acts on rotor (2), and the lower end acts on stator (1).The husky secondary separation tube of oil (28) is in envelope (29) is installed in rotor inner core (21).When entering the husky secondary separation tube of the oily flow path oil lower end of rotor inner core through filter screen, the kinetic energy of part silt and gravitational potential energy make its disengaging oil pump suction continue to go downwards to floating valve, form oily sand and separate once more, strengthen the filter sand effect, particularly low to viscosity thin oil.

Claims

1, a kind of oil well pump sand-filtering machine, it is characterized in that it is by static stator (1), the rotor (2) of motion and rotor energy-storing spring (31) are formed, rotor is installed in the stator, rotor energy-storing spring one end connects rotor, the other end connects stator, internal thread is established in stator drive cylinder (11) upper end, the lower end outside thread is threaded with stator casing (12) head end that the upper end has oil inlet passage (17), establish a plurality of brush grooves (14) in the stator casing, scrubbing brush (15) and scrubbing brush spring (16) are installed in the brush groove (14), the stator casing tail end is connected with silt trap (19) through transition joint (18) and connects to form stator, rotor driven plunger (24) with have spiral and support (23), rotor inner core (21) head end of inner core oil inlet passage (20) connects, and filter screen (22) is contained on the rotor inner core, and rotor inner core tail end is established floating valve and formed rotor.

2, oil well pump sand-filtering machine according to claim 1 is characterized in that rotor stretching energy storage spring is that employing garden post spiral stretching spring (31) is installed on rotor top, and the spring upper end is connected with stator, and the lower end is connected with rotor.

3, oil well pump sand-filtering machine according to claim 1 is characterized in that rotor energy-storing spring is an employing garden post spiral compression spring (32), is installed on the rotor bottom, and the spring upper end acts on rotor, and the lower end acts on stator.

4, oil well pump sand-filtering machine according to claim 1 is characterized in that rotor inner core tail end establishes floating valve, and floating valve is by the spool retaining (27) of bottom, the valve seat on top (25) and form near the spool (26) of valve seat (25).

5, oil well pump sand-filtering machine according to claim 1 is characterized in that oily husky secondary separation tube (28) is in envelope (29) is installed in rotor inner core (21).

6, oil well pump sand-filtering machine according to claim 1 is characterized in that stator casing (12) constitutes the silt sinking passage that is communicated with silt trap (19) with filter screen (22).