CN2387282Y

CN2387282Y - Oil-well pump with sands-proof check

Info

Publication number: CN2387282Y
Application number: CN 98249202
Authority: CN
Inventors: 马东; 马宁
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-12-03
Filing date: 1998-12-03
Publication date: 2000-07-12
Anticipated expiration: 2008-12-03

Abstract

The utility model relates to an oil-well pump with sand-proof check, which is composed of a plunger 1, a pump barrel 2, an O-shaped ring and steel rings 4, wherein, positions are approach to both ends of the plunger 1 and are respectively provided with a pair of convex baffle rings 5. An annular slot is arranged between the two baffle rings 5, and the O-shaped ring 3 is arranged in the annular slot. More than two steel rings 4 are clamped between the two baffle rings 5 of the outer side of the O-shaped ring 3, and the steel rings 4 and the pump barrel 2 are contacted to form seal. The utility model has the advantages that the utility model adopts a plurality of rigid and soft rings which are mutually matched and sealed, the utility model ensures completely preventing sand from entering a sealing pair, and the phenomenon that the oil-well pump is clamped is prevented.

Description

Sand control card oil well pump

The utility model relates to oil exploitation technology, is a kind of sand control card oil well pump that is used for mechanical oil recovery.

The most frequently used in mechanical oil production technology is to utilize reciprocating oil-well pump; when pumping crude oil; sand grains in the crude oil can enter in the gap of pump barrel and plunger, and these wearing and tearing that not only can aggravate between friction pair descend pump efficiency, but also " holddown " may take place oil well are stopped production.At present, for how in two ways solving this class problem, the one, sand is deposited in the tail pipe, prevent from or reduce sand to enter in the pump barrel, but be full of tail pipe with sand, its sand control hypofunction disappears; Another kind is that the sand that enters pump barrel is together discharged the pump housing together with crude oil, the method that adopts has the plunger of increasing and pump barrel gap, increases the plunger rotating machinery, changes piston structure, make passage discharge between the sand engaging friction pair etc., but in actual applications, this several method can only reduce the quantity that sand enters, and can not prevent " holddown " phenomenon.

The utility model purpose provides a kind of sand control card oil well pump that can effectively prevent " holddown " phenomenon.

The utility model provides following technological scheme: sand control card oil well pump is made up of plunger 1, pump barrel 2, " O " type ring 3, steel loop 4, the baffle ring 5 that a pair of projection is respectively arranged at the two-end part near plunger 1,5 of two baffle rings also have ring shaped slot, " O " type circle 3 is housed in the ring shaped slot, 5 of two baffle rings in " O " type circle 3 outsides snap in the steel loop 4 more than two, and steel loop 4 contacts with pump barrel 2 and constitutes sealing.

The utility model also provides following technological scheme: have axial gap on the sand control card oil well pump steel loop 4, steel loop 4 cross sections are the square type, and " O " type 3 circles are made by elastic material.

The utility model advantage is to have adopted the gentle sealings that cooperatively interact that encircle of steel more, guarantees to stop that fully sand enters sealing pair, has prevented " holddown " phenomenon of oil well pump.

The utility model accompanying drawing is a sand control card oil well pump structural representation.

Describe the utility model in detail below in conjunction with accompanying drawing.Sand control card oil well pump mainly is made up of plunger 1, pump barrel 2, " O " type circle 3, steel loop 4, near the two-end part of plunger 1 (because of plunger two-end structure symmetry, the side of only drawing among the figure) baffle ring 5 of a pair of projection is respectively arranged, 5 of two baffle rings also have ring shaped slot, " O " type circle 3 that the rubber elastomeric material is made is housed in the ring shaped slot, 5 of two baffle rings in " O " type circle 3 outsides snap in the steel loop 4 (present embodiment is two) more than two, steel loop 4 cross sections are the square type, contact with pump barrel 2 to constitute contact seal.Under pressure, constitute sealing between " O " type circle 3 and plunger 1, the steel loop 4.Steel loop 4 is made by Wear Resisting Steel, has axial gap on steel loop 4, so that between two protruding baffle rings of the plunger 1 of packing into, steel loop moves with plunger during work, 4 main effect is to stop and sweep sand grains between plunger 1 and the pump barrel 2, makes that pump is unlikely to be blocked because of sand.

Claims

1. sand control card oil well pump is by being made up of plunger (1), pump barrel (2), " O " type circle (3), steel loop (4), the baffle ring (5) that a pair of projection is respectively arranged at the two-end part near plunger (1), two baffle rings also have ring shaped slot between (5), " O " type circle (3) is housed in the ring shaped slot, snap in the steel loop (4) more than two between two baffle rings (5) in " O " type circle (3) outside, steel loop (4) contacts with pump barrel (2) and constitutes sealing.

2. sand control card oil well pump according to claim 1 is characterized in that: steel loop (4) cross section is the square type, and steel loop has axial gap on (4).

3. sand control card oil well pump according to claim 1 is characterized in that: " O " type circle (3) is made by elastic material.