CN2206837Y

CN2206837Y - Automatic pressure unit for water flooding well of oil field

Info

Publication number: CN2206837Y
Application number: CN 94216390
Authority: CN
Inventors: 陈成群; 马莉
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-10-06
Filing date: 1994-10-06
Publication date: 1995-09-06
Anticipated expiration: 2004-10-06

Abstract

The utility model relates to an automatic pressurizing unit for water flooding well of oil field. The support frame of the upper part of the water flooding well is provided with a main pressurizing cylinder and a subsidiary pressurizing cylinder-power cylinders, and the two pressurizing cylinders are arranged in parallel. A plunger in the pressurizing cylinder is connected with the piston of the power cylinder as a whole, the front end of the plunger is provided with a push rod, a travelling piston of the front end in the body of the power cylinder is pushed by the push rod, oil pressure is driven to communicated with the piston motion in a reversing liquid cylinder, the incoming water of the reversing valve is reversed, the main power cylinder and the subsidiary power cylinder are reciprocally moved in an alternating mode, and thereby, the incoming water in the pressurizing cylinder is flooded in the water flooding well after the incoming water in the pressurizing cylinder is pressurized. The utility model has the advantages of simple structure, and convenient installation. The water flooding well of oil field can be pressurized, and the oil expelling efficiency of oil layers is improved under the condition that the ground pipe lines are not changed.

Description

Automatic pressure unit for water flooding well of oil field

The utility model relates to and a kind ofly carries out the high-pressure water injection well supercharging device to oil reservoir in oilfield engineering.The water works engineering that present water injection well in oil fields is adopted is the water flooding pump station of setting up certain pressure and displacement, lays the pipe network and the meter of certain pressure and joins the station, carries out oil-field flooding in the rated pressure scope.In the long-term injecting water of oil field, because the obstruction and the pollution on stratum, suction pressure constantly increases, and indivedual wells do not satisfy the requirement of water injection rate under original water injection equipment pressure, therefore must carry out pressurized water injection.Implementing the currently used method of pressurized water injection has: the one, change surface line, and pumping plant is changed high-pressure plunger pump again simultaneously.The 2nd, the hydraulic cylinder that a high-pressure plunger pump or high drive are installed at water injection well carries out pressurized water injection.These two kinds of water fillings at first will solve the power source problem of water filling field, promptly will set up power network, power supply unit etc., and this invests high, and use and management difficulty are big.

Order of the present utility model provides a kind of water injection well in oil fields automatic pressure unit, is used for water to be used as power, and through going in the well that reinjects behind the supercharging device, has solved an oil well high pressure water injection difficult problem, improves injection pressure and injection rate, improves the oil reservoir oil displacement efficiency.

The utility model purpose is to realize like this, on support above the water injection well, two sealing disjunctor master pressurized cylinders that are arranged in parallel are installed, and--active force cylinder and pair power cylinder--pays pressurized cylinder, the ram area that plunger sectional area ratio in the main pressurized cylinder is paid pressurized cylinder is big, the pressurized cylinder water inlet end is connected with the unidirectional valve that advances to annotate, the pressurized cylinder water side is connected with unidirectional outflow valve, and the feed liquor valve connects back with water inlet line, flows out valve and leads to water injection well.Piston and pressurized cylinder inner plunger in the power cylinder are connected as a single entity, and piston nose is equipped with push rod.Left end main, that pay the power cylinder body is connected with commutation fluid cylinder and reversal valve.The fluid cylinder mechanism of the piston that moves about is housed in power cylinder left end chamber, and the push rod by piston nose promotes to move about piston actuated cavity oil pressure, and what commutation fluid cylinder inner carrier is moved handle reversal valve comes alternately commutation of water.Simultaneously accumulator all is housed at the power cylinder two ends.

Accompanying drawing is illustrated.

Fig. 1--the utility model molybdenum dish device front view;

Fig. 2--this principle of device and structural representation;

Fig. 3--the fluid cylinder mechanism map of the piston that moves about in the power cylinder.

In conjunction with the accompanying drawings the utility model structure and supercharging principle are specified:

Fig. 1,2, the water injection well in oil fields automatic pressure unit, support 40 is housed above water injection well 30, a main pressurized cylinder 18--active force bent 20 and pair pressurized cylinder 13--who seals disjunctor that be arranged in parallel on the rack platform two pays power cylinder 12, plunger 31 is housed in the pressurized cylinder, 33, the cross-sectional area of the plunger 31 of main pressurized cylinder is bigger than paying pressurized cylinder plunger 33 cross-sectional areas, main, the water inlet end of paying pressurized cylinder is equipped with unidirectional

feed liquor valve

17,15, this feed liquor valve connects to come water pipeline, unidirectional outflow valve 16 is equipped with in the pressurized cylinder water side, 14, flow out valve and lead to water injection well 30, on the water injection well 30 bubble valve 22 is housed also simultaneously.Piston 7 in the power cylinder is connected as a single entity with the pressurized cylinder inner plunger, piston area is bigger than ram area, its front end also is equipped with push rod 5, left end main, that pay the power cylinder body also is connected with commutation fluid cylinder 11 and reversal valve 10, power cylinder comes water to realize commutation by reversal valve 10, the driving of reversal valve 10 comes the piston motion in the self-commutation fluid cylinder, and this motion is to force the cavity oil pressure to increase by the piston 4 that moves about in the moving state cylinder to realize.

At power cylinder 20(12) left end in the piston that moves about is housed trip cylinder mechanism (Fig. 3), pressure cap 1 adds the termination that the fluid sealant circle is fixed on power cylinder 20 by screw thread, the piston 4 that moves about can slide at oil cylinder cavity 8 walls, the spacing back-up ring 9 of oil pocket built-in spring limits the range of the piston 4 that moves about, and the oil pressure in the oil cylinder cavity 8 lead in the commutation fluid cylinder 11 by pipeline 3.Oil cylinder cavity 8 outer shrouds still have intake antrum 6 simultaneously, intake antrum is connected with water pipe 2, when coming the hydrodynamic force actuation plunger--during piston stroking upward (left lateral), its piston 7 front end push rods 5 piston 4 that promotes to move about is up, give oily supercharging in the oil cylinder cavity, drive the piston motion of commutation fluid cylinder 11, make reversal valve 10 commutations.

The automatic pressurization of water injection well in oil fields is achieved in that

What (water injection equipment) came water pipeline comes water through bent 18 o'clock of unidirectional feed liquor valve 17 water filling master superchargings, the piston 7 that comes hydrodynamic force to promote in plunger 31 up (left-hand moves) the interlock active force cylinder 20 is up, coming water to enter cylinder body water cavity 6 in the propulsion power cylinder flows to reversal valve 10 payment power cylinders 12 by water pipeline 2 and adds the moving piston 7 descending (right lateral) in pool, come the water supercharging in the interlock plunger 33 descending payment pressurized cylinders 13, the water that comes after the supercharging injects water injection well 30 through unidirectional outflow valve 14, finishes and once comes water to increase process.

Simultaneously, when the piston of paying power cylinder 12 travels not end (right-hand member) for 7 times, piston 7 in the active force cylinder enters the cylinder body left end, orders about promote to move about on the piston 4 oil pressure in an actor's rendering of an operatic tune of piston nose push rod 5 and promotes piston motion in the commutation fluid cylinders 11 by pipeline 3, forces reversal valve 10 to change and comes current direction.At this moment another road pipeline of water injection equipment comes water, process reversal valve 10 makes in the active force cylinder 20 hydrodynamic force is provided, because piston cross-section is long-pending bigger than plunger sectional area, piston 7 is descending, interlock plunger 31 is descending to main pressurized cylinder supercharging simultaneously, supercharging water is afterwards injected in the water injection well 30 through unidirectional outflow valve 16, once to give the water injection well pressurized water injection.

In this simultaneously, reversal valve 10 makes pair power cylinder 12 interior water flow into return piping again, can make water to enter by unidirectional feed liquor valve 15 and pay in the pressurized cylinder 13, treats supercharging.When paying piston in the moving affair cylinder and entering into the cylinder body left end, piston nose push rod 5 promotes to move about piston 4 again, oil pressure are increased lead to the piston that cylinder 11 is recognized in commutation through another road, force reversal valve 10 to change and come current direction, simultaneously, originally a road binders pipe 3 makes the piston that moves about in the active force cylinder oil pocket 8 return to original state.Repeat to pressurized water injection state for the first time so again, the active force that comes to this cylinder 20 with pay the power cylinder 12 origin water alternate reciprocating motion that is used as power, realize the overall process of commutation and supercharging.

When need commutate in the ranks termination on power piston 7, for overcome with piston because of reversal valve cause instantaneous disconnected in, make the power cylinder piston not reach the design commutation position.Two ends at power cylinder all are connected with

accumulator

21 and 19, to guarantee automatic pressure unit action continuity.Illustrate it is that commutation fluid cylinder 11 and the reversal valve 10 that this device adopts is the commercially available prod.

This device is to be used to water be used as power, do not need additionaling power equipment, reach automatic pressurized water injection, at home each oil field can be extensively color and, especially be used in when annotating not surface pipeline network corrosion and bearing capacity for a long time and descend, do not changing the surface line situation, adopt this device, the oil-field flooding supercharging is improved greatly, and the oil reservoir oil displacement efficiency has change greatly.This apparatus structure is simple, and is easy for installation, and operating maintenance is convenient.

Claims

1, a kind of water injection well in oil fields automatic pressure unit,--active force cylinder and pair pressurized cylinder--pays power cylinder to it is characterized in that being equipped with on the support above the water injection well two sealing disjunctor master pressurized cylinders that are arranged in parallel, piston in the power cylinder and the plunger in the pressurized cylinder are connected as a single entity, and piston nose is equipped with push rod; The ram area that plunger sectional area ratio in the main pressurized cylinder is paid in the pressurized cylinder is big, and the pressurized cylinder water inlet end is connected with unidirectional feed liquor valve, and this valve connects water inlet pipe, and the pressurized cylinder water side is connected with unidirectional outflow valve, and its valve leads to water injection well; In the trip cylinder mechanism that power cylinder left end inner chamber is equipped with the piston that moves about, main, a pair power cylinder is connected with commutation fluid cylinder and reversal valve.

2, water injection well in oil fields automatic pressure unit according to claim 1, the pressure cap that it is characterized in that the power cylinder left part is fixed on the cylinder body termination by O-ring seal, in the oil cylinder control body piston that moves about is housed, and the spacing back-up ring of spring is arranged, at the bent cavity outer shroud of oil intake antrum is arranged, intake antrum connects water pipe.

3, water injection well in oil fields automatic pressure unit according to claim 1 is characterized in that the power cylinder two ends are connected with accumulator.