CN2269481Y - Pressure-increasing compensation device for oil-well pump - Google Patents

Abstract

The utility model provides an oil-well pump pressure boost compensation arrangement with oil well pump, its characterized in that pressure boost compensator casing (18) are built-in has bottom valve (2), disk seat (3), valve ball (4), traveling valve body 5, pull rod (8), drive piston (10) etc. constitute the subassembly that moves about, drive piston (10) divide into two parts with the inner chamber of driving body (9), the cavity of resorption of driving body (9) communicates with each other through communicating pipe (14) and the upper portion tubular column of plunger (23) of plunger pump, the upper chamber of driving body (9) communicates with each other through communicating pipe (17) and plunger pump suction chamber, pressure boost compensator casing upper end is connected with plunger pump lower joint (19).

Description

The oil well pump boosting compensation device

The utility model relates to and a kind ofly carries out pressure compensated pressure compensator for oil-well pump of oil well feed liquor amount.

At present, the extensive oil well pump that adopts in oil field is reciprocating plunger pump.In aspiration procedure, be subjected to the submergence of pump, the hysteresis of pump valve, the influence of oil-gas ratio, cause the suction fill factor of pump to reduce, the efficient of pump is reduced to below 50%.And existing jet boosting compensation device, because the intrinsic poor efficiency factors such as (can only reach 30%) of Jet injector, it is not very desirable causing compensation effect, and when sucking compensation, the loss of the released liquor of pump is bigger.

It is few that the purpose of this utility model provides a kind of discharge opeing loss, and utilization fluid pressure differential principle improves the oil well pump boosting compensation device of supercharging compensation efficient.

In the boost compensator housing of the present utility model bottom valve is arranged, compositions such as valve seat, the valve body that moves about, valve ball, pull bar, the driven plunger assembly that moves about, driven plunger is with the inner chamber separated into two parts of driving body, the cavity of resorption of driving body by connecting tube the upper chamber with the plunger of plunger pump communicate, the epicoele of driving body communicated with the plunger pump suction chamber by connecting tube, and boost compensator housing upper end is connected with the plunger pump lower contact.

Advantage of the present utility model is that boost compensator has improved the former oil mass of suction of oil well pump, thereby improves the suction fill factor of pump, has improved pump efficiency.

Fig. 1 is the utility model structural drawing;

Fig. 2 is and the matching used oil well pump structure diagram of the utility model.

Now further specify as follows to the utility model structure and working principle in conjunction with the accompanying drawings:

In the boost compensator housing 18 of the present utility model bottom valve 2 is arranged, spring 1 is housed on the bottom valve 2, to accelerate the closing velocity of bottom valve 2.Valve seat 3, valve ball 4, valve body 5 moves about, pull bar 8, compositions such as driven plunger 10 assembly that moves about, the valve body 5 that moves about is connected with pull bar 8 with pad 7 by bolt 6, pull bar 8 is by seal ring 11, locking nut 12 and pad 13 are connected with driven plunger 10, driven plunger 10 is with the inner chamber separated into two parts of driving body 9, the cavity of resorption of driving body 9 by connecting tube 14 upper chamber with the plunger 23 of plunger pump communicate, the epicoele of driving body 9 communicated with the plunger pump suction chamber by connecting tube 17, plug 15 and fixing bolt 16 are arranged at driving body 9 tops, boost compensator housing 18 upper ends link by second line of a couplet joint and scavenge oil-pump body 20, and scavenge oil-pump body 20 is connected with the top oil pipe by upper binding head 25.Sucker rod 24 is driven by pumping unit and moves up and down.When sucker rod 24 moved downward, the standing valve 21 of oil well pump was closed, and travelling valve 22 is opened, and the upper and lower cavity of pump plunger 23 communicates, and pressure is consistent.Because the effect of connecting tube 14,17, the upper and lower cavity pressure of the driven plunger 10 in the driving body 9 also is consistent.But driven plunger 10 is subjected to the area of former oil pressure inequality up and down, the top area is greater than the bottom area, so the active force on top is greater than the active force of bottom, thereby have downward making a concerted effort, promote driven plunger 10 and move downward, and bottom valve 2 cuts out, the traveling valve assembly of driving body 9 is opened, the oil of valve seat 3 bottoms is entered in the upper cavity of valve seat 3, thereby finish eharge stroke; When sucker rod 24 moved upward, the travelling valve 22 of oil well pump was closed, and pump plunger 23 upper chamber just become hyperbaric chamber, and lower cavity then becomes low-pressure cavity.The high pressure oil of upper chamber is from entering the cavity of driven plunger 10 bottoms the driving body 9 connecting tube 14.Because driven plunger 10 upper cavity were communicated with the low-pressure cavity of oil well pump by connecting tube 17, so under the high pressure oil effect, driven plunger 10 is up, and it is up to drive valve seat 3.At this moment, the bottom valve 2 of boost compensator is opened, and the oil in the pit shaft enters valve seat 3 bottoms, carries out oil-filled.Simultaneously, the traveling valve assembly of boost compensator is closed, and the standing valve 21 of oil well pump is opened, and the crude oil in the boost compensator is pumped in the oil well pump 20, thereby finish the oil-filled stroke of the supercharging of oil well pump.Because the crude oil of going in the oil well pump has certain pressure, thus can help the standing valve 21 of oil well pump to open in advance on the one hand, on the other hand, owing to improved the former oil mass of the suction of oil well pump, thus improve the suction fill factor of pump.Again because the crude oil that enters in the oil well pump has certain pressure, this will reduce pump plunger 23 resistance when up, thereby reduce the suspending point loading of pumping unit, prevent sucker rod 24 disconnected taking off.Because this boost compensator has adopted the very little flat valve of feed liquor resistance, so its suction resistance is reduced greatly, has increased the feed liquor amount, and then has improved the fill factor of pump, has improved pump efficiency.

Claims (2)

1, a kind of oil well pump boosting compensation device with oil-well pump of oil well, it is characterized in that bottom valve (2) is arranged in the boost compensator housing (18), valve seat (3), valve ball (4), valve body (5) moves about, pull bar (8), driven plunger compositions such as (10) assembly that moves about, driven plunger (10) is with the inner chamber separated into two parts of driving body (9), the cavity of resorption of driving body (9) by connecting tube (14) the top tubing string with the plunger (23) of plunger pump communicate, the epicoele of driving body (9) communicated with the plunger pump suction chamber by connecting tube (17), and boost compensator housing upper end is connected with plunger pump lower contact (19).

2, oil well pump boosting compensation device according to claim 1 is characterized in that being equipped with on the bottom valve (2) spring (1).

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