CN2550502Y - Self sealing type liquid blending stirrer for viscous crude well - Google Patents

Abstract

The utility model relates to a well washing device of oil well by doping liquid and stirring, comprising a stirrer, a centralizer, a tubing drain and a dynamic seal assembly. The utility model adopts a composite structure of a mixing drum, the tubing drain, a low-gravity valve ball valve, a cup leather packing assembly and the centralizer. When the doping liquid or well washing liquid enters the deep well pump to reach the device from the annular space of the oil sleeve, the ball valve is closed automatically, the cup leather packing assembly is opened and attached closely to the sleeve wall under pressure., so that the medical solution or the well washing liquid is prevented from entering the oil layer to enable all the doping liquid to play important roles and be fully mixed with the output liquid of the well by a mixing drum, after the viscosity is reduced, the mixing liquid enters the deep well pump, so that the liquid doping and stirring and leakage prevention are achieved. The utility model has the advantages of compact structure, reasonable design, advanced technology and reliable function. The utility model is suitable for the needs of energy-saving consumption and improving measure success rate of the oil well.

Description

The self-sealing heavy oil wells is mixed alloy melt stirring device

The utility model relates to the downhole tool that uses in a kind of oilfield, and particularly a kind of self-sealing heavy oil wells is mixed alloy melt stirring device.

The main method that solves thickened oil recovery at present is the hollow stem electrical heating, but the power consumption in this method every year is quite surprising, so having taked sleeve pipe to mix thin oil again, production unit replaces the electrical heating oil recovery, because there is the low phenomenon of producing fluid level in most of heavy oil wells, mix the thin oil back production fully in the sleeve pipe, the oil reservoir that bleeds wastes limited thin oil, has reduced the effect of thin oil blending visbreaking.

The purpose of this utility model is to provide a kind of self-sealing heavy oil wells to mix alloy melt stirring device, and this kind device and the supporting use of common pumping pipe string can stop to mix in the sleeve pipe the bleed phenomenon of oil reservoir of thin oil, greatly the raising effect of mixing the liquid viscosity reduction.

The utility model is to realize like this, it is made of agitator, centralizer, bleeder, slipper seal assembly, and wherein agitator comprises that top connection (1), position-limiting cover (2), stirring vane (3), shaft (4), sharf set upright cover (5), blade spacer (6), mixing drum (30); Centralizer comprises centralizer main body (7), wiper block guard shield (8), sets upright friction block (9), wiper block spring (10); Bleeder comprises draining cover (11), valve ball position-limitting pin (12), low-gravity valve ball (13), ball seat (14), sealing sliding sleeve (15), O RunddichtringO (20), lock pin steel ball (16), lock pin spring (17), spring compression nut (18); The slipper seal assembly comprises center seal pipe (19), y-type seal ring (21), slipper seal assembly main body (22), last leather cup (23), goes up leather cup seat (24), lower rubber cylinder (25), lower rubber cylinder spacer (26), lower rubber cylinder seat (27), lower contact (28) composition; Agitator is connected successively with centralizer, bleeder, slipper seal assembly, centralizer.Top connection (1) is connected with mixing drum (30) top, the stroke of centralizer in the qualification, stirring vane (3) is arranged in mixing drum (30), shaft (4), sharf is set upright cover (5), blade spacer (6), last centralizer and draining cover (11) connect to form to open lets out centralizer, and be enclosed within on the mixing drum (30), following centralizer and slipper seal assembly connect to form closes centralizer, valve ball position-limitting pin (12) riveting fixes on the mixing drum (30), low-gravity valve ball (13) is pressed in the mixing drum bottom with ball seat (14), mixing drum (30) bottom is connected with center seal pipe (19), is with sealing sliding sleeve (15) from top to bottom successively, O RunddichtringO (20), lock pin steel ball (16), lock pin spring (17), spring compression nut (18); The slipper seal assembly comprises center seal pipe (19), y-type seal ring (21), slipper seal assembly main body (22), goes up leather cup (23), goes up leather cup seat (24), lower rubber cylinder (25), lower rubber cylinder spacer (26), lower rubber cylinder seat (27), lower contact (28) is connected with center seal pipe (19), limits the stroke of slipper seal assembly.

When work, with the utility model by from the bottom to top order of connection G.I.H: plug-sand sediment pipe-sand anchor-tail pipe-mix liquid to stir tubing string-production wellhead on flushing packer-tail pipe-deep well pump-pump.

Operating principle: when heavy crude well is normally mixed liquid and is produced, in the well liquid through sand anchor, tail pipe, mix liquid device and enter the oil jacket annular space, mix liquid and well liquid through making under the deep well pump suction effect and in mixing drum, enter deep well pump after the abundant stirring.Low-gravity valve ball opening pressure is 0.1Kg, and can regulate the time that opens or closes automatically according to mixing the size of liquid measure or the needs of well-flushing, has stoped soup or thin oil to be missed to oil reservoir.When clean-out service, the ball-and-seat that low-gravity valve ball, ball seat are formed is closed, and seal assembly leather cup and glue tube base envelope stop the flushing fluid oil reservoir that bleeds.When carrying oil pipe on the operation inspection pump, last centralizer is motionless relatively, and it is descending to promote sealing draining sliding sleeve, and draining hole (31) open draining, and the interior liquid of annular space is leaked in the well, has reduced the operation ground pollution.

The utility model has been owing to adopted mixing drum, centralizer, bleeder, low-gravity valve ball, slipper seal assembly structure, and when producing fluid level head of liquid during greater than formation pressure, ball valve is closed, and stops the thin oil oil reservoir that bleeds.When deep well pump was worked, thin oil entered mixing drum with viscous crude and is stirred, and was fully mixed before advancing pump, and viscosity reduces.The bleeder of this device can be when the operation lift pipe string, is communicated with lower channel on the packer, eliminates packer is suggested well head to the induced flow effect and the annular space producing fluid level of oil reservoir when last carrying phenomenon, prevents that operation from polluting the well site.Cutting seam sieve tube on the mixing drum can stop that particulate material and broken leather cup enter oil well pump, avoid the generation of holddown phenomenon.The utility model is rational in infrastructure, advanced technology, and reliable operation is fit to heavy oil wells and mixes applying of liquid thin oil blending visbreaking very much.

Accompanying drawing is a structural representation of the present utility model.

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

The utility model is by top connection 1, position-limiting cover 2, stirring vane 3, shaft 4, sharf is set upright cover 5, blade spacer 6, mixing drum 30, centralizer main body 7, wiper block guard shield 8, set upright friction block 9, wiper block spring 10, draining cover 11, valve ball position-limitting pin 12, low-gravity valve ball 13, ball seat 14, sealing sliding sleeve 15, O RunddichtringO 20, lock pin steel ball 16, lock pin spring 17, spring compression nut 18, center seal pipe 19, y-type seal ring 21, slipper seal assembly main body 22, last leather cup 23, last leather cup seat 24, lower rubber cylinder 25, lower rubber cylinder spacer 26, lower rubber cylinder seat 27, lower contact 28 is formed, to be assembled with lock pin steel ball 16, lock pin spring 17, sealing sliding sleeve 15 covers of spring compression nut 18 install to the upper end of center seal pipe 19, and the ledge of lock pin steel ball 16 snaps onto in the dovetail groove of center seal pipe 19; Y-type seal ring 21 is packed in the groove of slipper seal assembly main body 22, and opening is dress upwards; To go up leather cup 23 successively, go up leather cup seat 24, lower rubber cylinder 25, lower rubber cylinder spacer 26, lower rubber cylinder seat 27 be enclosed within on the slipper seal assembly main body 22, tightening with screw thread becomes seal assembly, to descend centralizer and seal assembly with being threaded again, then according to centralizer under direction, seal assembly is enclosed within on the center seal pipe 19; Lower contact 28 is threaded with center seal pipe 19 usefulness.Position-limiting cover 2 and shaft 4 upper ends are enclosed within 11 blade spacers 6 and 10 stirring vanes 3 on the shaft 4 then successively with being threaded, and sharf is set upright being threaded of cover 5 and shaft lower end, compresses spacer and blade, and staggered positions is wanted in the hole of adjacent blades; The stirring core of having assembled is packed into from the top of mixing drum, with top connection 1 usefulness screw thread it is pressed in the mixing drum 30 then; 4 groups of wiper block springs 10 are packed into 4 set upright in the friction block 9, wiper block is pressed on the centralizer main body 7 again, two ends are formed centralizer with wiper block guard shield 8 with the wiper block location.Last centralizer and draining cover 11 adapter sleeves are on mixing drum 30; Following centralizer and seal assembly adapter sleeve are on center seal pipe 19; Low-gravity valve ball 13 is pressed on the mixing drum bottom with the screw thread of ball seat 14 sealed central tube upper ends, and centralizer is close to casing wall under the effect of spring, but can slide up and down along casing wall under external force.

Claims (5)

1, a kind of heavy oil wells is mixed liquid stirring well washing apparatus, it is made of agitator, centralizer, bleeder, slipper seal assembly, and wherein agitator comprises that top connection (1), position-limiting cover (2), stirring vane (3), shaft (4), sharf set upright cover (5), blade spacer (6), mixing drum (30); Centralizer comprises centralizer main body (7), wiper block guard shield (8), sets upright friction block (9), wiper block spring (10); Bleeder comprises draining cover (11), valve ball position-limitting pin (12), low-gravity valve ball (13), ball seat (14), sealing sliding sleeve (15), O RunddichtringO (20), lock pin steel ball (16), lock pin spring (17), spring compression nut (18); The slipper seal assembly comprises center seal pipe (19), y-type seal ring (21), slipper seal assembly main body (22), last leather cup (23), goes up leather cup seat (24), lower rubber cylinder (25), lower rubber cylinder spacer (26), lower rubber cylinder seat (27), lower contact (28) composition; Agitator and centralizer, bleeder, the slipper seal assembly, centralizer connects successively, top connection (1) is connected with mixing drum (30) top, the stroke of centralizer in the qualification, stirring vane (3) is arranged in mixing drum (30), shaft (4), sharf is set upright cover (5), blade spacer (6), last centralizer and draining cover (11) connect to form to open lets out centralizer, and be enclosed within on the mixing drum (30), following centralizer and slipper seal assembly connect to form closes centralizer, valve ball position-limitting pin (1 2) riveting fixes on the mixing drum (30), low-gravity valve ball (13) is pressed in the mixing drum bottom with ball seat (14), mixing drum (30) bottom is connected with center seal pipe (19), is with sealing sliding sleeve (15) from top to bottom successively, O RunddichtringO (20), lock pin steel ball (16), lock pin spring (17), spring compression nut (18); The slipper seal assembly comprises center seal pipe (19), y-type seal ring (21), slipper seal assembly main body (22), goes up leather cup (23), goes up leather cup seat (24), lower rubber cylinder (25), lower rubber cylinder spacer (26), lower rubber cylinder seat (27), and lower contact (28) is connected with center seal pipe (19).

2, heavy oil wells according to claim 1 is mixed alloy melt stirring device, it is characterized in that: mixing drum (30) Lower Half is a cutting seam sieve tube.

3, heavy oil wells according to claim 1 is mixed alloy melt stirring device, it is characterized in that: anti-your ball (13) of low-gravity is a hollow steel ball.

4, mix alloy melt stirring device according to the described heavy oil wells of claim 1, it is characterized in that: leather cup (23) is wear-resisting, withstand voltage, the oil resistant rubber goods of band cage construction.

5, mix alloy melt stirring device according to the described heavy oil wells of claim 1, it is characterized in that: seal assembly is gone up at center seal pipe (19) with following centralizer adapter sleeve and is formed the slipper seal assembly, and sliding distance is not less than 300mm.