CN2549206Y - Soft plunger pump against sand deposit - Google Patents

Abstract

The utility model discloses a soft plunger pump against sand deposit, comprising an inner barrel, an outside barrel, a fixed valve and a soft plunger; the soft plunger consists of an upper connector, a sand guide ring, an upper oil outlet valve, a locking nut, an upper aligning ring, an end ring, a leather bowl supporting ring, a leather bowl of soft plunger, a central tube, a lower aligning ring and a lower oil valve, of which are combined in turn; the upper part of the sand guide ring is excavated with a plurality if ring shape grooves; a shunting connector is arranged at the suction port of the pump; the lower end of the pump is provided with a sand deposit bag. The pump effectively solves that problem of sand blocking in the soft plunger, realizing the functions of sand pumping, sand carrying and sand deposit prevention; with the communicated pressure reducing structure, the pump enable the working pressure be evenly dispersed; when in the ascending stroke, the sealing effect is enhanced, while in the descending stroke, the abrasion is reduced, so that the life span of the piston is prolonged, the cost is reduced and the pumping efficiency is increased. The utility model can be applied in the thick oil well, the sparse oil well, the sand pumping well and the sand bailing well.

Description

Soft plunger against sand deposit

The utility model relates to a kind of oil field rod pumping pump, especially a kind of soft plunger against sand deposit.

Common soft plunger rod pumping pump sealing is strong, and bigger suction force can be provided.The soft plunger oil pump of on-the-spot widespread usage comprises inner core, urceolus, standing valve and soft plunger, and soft plunger is made of upper connection, end ring, center tube, soft plunger skin wrist, skin wrist support ring, locking nut, upper and lower centering ring and upper and lower outlet valve.The working principle of conventional soft plunger oil pump is: when plunger is descending, the pump barrel upper and lower cavity of being cut apart by plunger is communicated with, make the plunger two ends not produce pressure difference, plunger seal skin wrist lip keeps assembling condition, with pump barrel inwall Spielpassung, the descending resistance of plunger is reduced, obtain effectively lubricating in the work of sealing skin wrist, increase wear-out life; And when plunger is up, traveling valve cuts out, under head of liquid effect on the pump, plunger produces very big pressure reduction up and down, makes it when bearing liquid seal pressure, produce certain export-oriented tension force, the lip position is adjacent to the pump barrel inwall, keeps the zero clearance sealing with pump barrel, and the wastage between pump barrel and the plunger is close to zero at this moment, the enhanced suction effect has strengthened the filling index of pump in addition, effectively improves pump efficiency.But existing Soft plunger pump does not have sand control installation, the sand grains of sedimentation at first enters between pump barrel and the plunger in the oil pump tubular column, the sand card takes place, carry out frequent remove pump and workover eration, improve operating cost, while skin wrist integrated carrying ability, compressive strength is low, working life is short, thus conventional Soft plunger pump can't be in thick oil well, thin oil well, sand output well and bailing well widespread usage.

Main purpose of the present utility model provides a kind of soft plunger against sand deposit, and this pump has the sand of leading, sand setting mechanism, the sand grains of sedimentation in the oil pump tubular column can not be entered between pump barrel and the plunger, and can sink to swimmingly under the pump, prevents the sand card.

Another purpose of the present utility model is to improve the stress of each leather cup, and working pressure is evenly distributed on each carrying leather cup, improves soft plunger integrated carrying ability.

Soft plunger pump of the present utility model comprises inner core, urceolus, standing valve and soft plunger, soft plunger by upper connection, sand guide ring, go up outlet valve, locking nut, go up centering ring, end ring, skin wrist support ring, soft plunger skin wrist, center tube, down centering ring, outlet valve connects and composes successively down, sand guide ring top has several annular grooves; The place is provided with tap at pump intake, is provided with the sand setting bag in the lower end of pump.

The skin wrist support ring of soft plunger is provided with belt hole, and center tube is provided with groove.

Have the sand of leading, sand setting mechanism on the plunger of Soft plunger pump of the present utility model, thereby can realize taking out sand, taking sand, prevent the sand card; This pump has adopted the connection pressure reduction structure, makes the working pressure distributed equalization, strengthens sealing effect in upstroke, and down stroke reduces wear, and has prolonged the working life of plunger, reduces cost, and improves pump efficiency.

Accompanying drawing 1 is a structure sectional view of the present utility model.

Below in conjunction with accompanying drawing the utility model is described further.

As can be seen from Figure, Soft plunger pump of the present utility model comprises inner core 11, urceolus 13 standing valves 14 and soft plunger 17, soft plunger 17 by upper connection 1, sand guide ring 2, go up outlet valve 3, locking nut 4, go up centering ring 5, end ring 6, skin wrist support ring 7, soft plunger skin wrist 8, center tube 9, down centering ring 10, outlet valve 12 connects and composes successively down, sand guide ring 2 tops have several annular grooves 21; Be provided with tap 15 at the pump intake place, be provided with sand setting bag 16 in the lower end of pump.

The sand guide ring 2 of soft plunger upper end, the tap 15 at pump intake place, the sand setting bag 16 of pump lower end constitutes to set upright together leads sand mechanism, sand guide ring 2 tops have several annular grooves 21 to be close to the sand grains that pump barrel makes sedimentation in the oil pump tubular column and can not to enter between pump barrel and the plunger, can take advantage of a situation then and enter into sand setting bag 16 under the pump glibly; Tap 15 designs have guaranteed the mutual separation of oil-feed runner at the pump intake place, have guaranteed that again pump intake has enough big feed liquor area, can also make sand setting be unlikely to be deposited on tap 15 places, can enter sand setting bag 16 smoothly; The several sand sediment pipes of the sand setting bag of pump lower end are formed, and contain by leading the sand that sand mechanism imports, and the sand setting bag is the chamber of a sealing, mention aboveground during the inspection pump.The connection mechanism of decompressor has been designed at two ends up and down at plunger, and working pressure is evenly distributed on each carrying leather cup, has improved soft plunger integrated carrying ability, improves the stress of each leather cup.

This soft plunger has concurrently and improves pump efficiency and solve the problem that old pump is repaired, and for solving the mechanical oil recovery problem of serious sand output well, provides an approach, so very big development and application prospect are arranged

Claims (3)

1, a kind of soft plunger against sand deposit, comprise inner core (11), urceolus (13), standing valve (14) and soft plunger (17), it is characterized in that: described soft plunger (17) by upper connection (1), sand guide ring (2), go up outlet valve (3), locking nut (4), go up centering ring (5), end ring (6), skin wrist support ring (7), soft plunger skin wrist (8), center tube (9), down centering ring (10), outlet valve (12) connects and composes successively down, sand guide ring (2) top has several annular grooves (21); Be provided with tap (15) at the pump intake place, be provided with sand setting bag (16) in the lower end of pump.

2, soft plunger against sand deposit as claimed in claim 1, it is characterized in that: described skin wrist support ring (7) is provided with belt hole (22), and center tube (9) is provided with groove (23).

3, soft plunger against sand deposit as claimed in claim 1, it is characterized in that: described sand setting bag (16) is made up of several sand sediment pipes.

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