CN203685130U

CN203685130U - Oil well washing switch

Info

Publication number: CN203685130U
Application number: CN201420056162.2U
Authority: CN
Inventors: 石方培
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-01-22
Filing date: 2014-01-22
Publication date: 2014-07-02
Anticipated expiration: 2024-01-22

Abstract

An oil well washing switch is characterized in that a central pipe 3 with a hole groove B is sleeved with a pressure adjusting spring 2 and a cylinder sleeve 4 with an opening C, and a screw thread pair and a pressure adjusting nut 1 which are arranged at one end of the central pipe 3 are matched to adjust the pressure of the pressure adjusting spring 2 to the cylinder sleeve 4. The other end of the cylinder sleeve 4 is connected with a balance sealing sleeve 5, and the central pipe 3 is connected with an oil pipe column through threads at the two ends. The switch is used for well washing work of oil field and oil well maintenance, and the oil well washing switch is provided for the oil well. According to a well washing device, well washing liquid enters from an oil pipe, and is discharged out of a loop. The device is connected to the oil pipe column when an oil well pump descends to the well. Before the oil well pump descends to the well, the requirement of the device for different well descending depths can be achieved by adjusting the pressure adjusting nut 1, and the device can ensure normal oil well production and also can ensure smooth opening of the well in the well washing process.

Description

Oil well is just being washed switch

Technical field: the utility model relates to a kind of oil field well instrument, a kind of oil well of the clean-out service keeping in repair especially for oilfield is just being washed switch.

Background technology: after the stage of oil well production, easy wax deposition on oil pipe tube wall.After wax deposition is serious, cause oil well normally to produce.Before the utility model, the method for processing wax deposition has two kinds of methods substantially:

One method is to carry out oil well light maintenance.Exactly by sucker rod and oil pick-up tube from well all out, then clean on ground.After cleaning, then by its whole G.I.Hs.The method labour intensity is large, length consuming time, and not only maintenance cost is high, and affects the total output of oil well.

Second method is oil well to be carried out to backwash (flushing fluid is entered by ring set space, by discharging in oil pipe), by sucker rod plunger from oil well pump propose, then by ring set space (annular space between sleeve pipe and oil pipe) inject flushing fluid (being generally hot water).Flushing fluid, in oil-well pump bottom enters pumping pipe string, melts the wax deposition in tubing string, and is with producing well, reaches the object of cleaning oil pipe.Utilize the problem that the method mainly exists to be: on the one hand larger to the well-flushing liquid measure of injecting in well, and be indefinite, thereby cause the heating to flushing fluid and comprise the transportation that it is carried out, just need a large amount of fund inputs.On the other hand, a large amount of flushing fluids enters oil reservoir can cause oil layer pollution, the normal production of oil well after impact then.Cause the main cause that well-flushing liquid measure is larger to have two aspects:

1, the increase of definite flushing fluid.The volume in ring set space is 2.5 times of oil pipe internal volume, just the liquid in oil pipe is replaced out in well, with regard to the volume of flushing fluid used, at least with the volume of the liquid in the oil pipe of 3.5 times if that is to say.In addition, the area of dissipation of ring set is at least the twice of oil pipe, and a large amount of heats are absorbed by stratum, if will make the wax deposition in oil pipe be melted (do not reach melt temperature, wax deposition can not be melted), flushing fluid used is not just the concept of twice.The volume of flushing fluid at least will, higher than more than 5 of liquid volume in oil pipe times, just can reach the basic demand of cleaning oil pipe thus.

2, the increase of indefinite flushing fluid.Oilbearing stratum is after long-term exploitation, and formation pressure is lower, the strata pressure deficit of namely often saying.Flushing fluid enters behind ring set space, is first inhaled into stratum in debt, and after sucking a large amount of flushing fluid in stratum so that balancing each other with the pressure of oil-well pump bottom, flushing fluid could start to enter and in oil pipe, carries out cleaning oil pipe.The degree of strata pressure deficit depends on the residing stratum of oil well, well location.So this respect flushing fluid used is measured greatly, again without fixed number.

Summary of the invention: the purpose of this utility model is: just washing switch for oil well provides a kind of oil well, flushing fluid is entered by oil pipe, a kind of well washing apparatus of being discharged by ring set space, just washes oil well.This device is to be connected on oil pipe column.While needing well-flushing after wax deposition in oil pipe, as long as pump truck is accessed to well head four-way, then will produce valve closing, then just flushing fluid can be injected in oil pipe column.When tubing string internal pressure reaches after the well-flushing pressure of setting, oil well cleanup switch is just opened automatically, space in oil pipe is communicated with ring set space, flushing fluid is entered by oil pipe, through Fan Dao ground, ring set space (a small amount of flushing fluid just can complete well-flushing sometimes, these flushing fluids may by formation absorption).After well-flushing completes, stop injecting flushing fluid in well, borehole pressure reduces, and oil well cleanup switch cuts out automatically, and oil well can return to normal production.

Be characterized in:

1, simple in structure.Cost is low.Input cost is few.

2, simple to operate.Coordinate without other technique.

3, can conveniently adjust the pressure of unlatching, to meet the needs of different well depths.

4, flushing fluid directly enters oil pipe, whole liquid with and all heat all for cleaning tubing, thereby do not exist flushing fluid to waste to obtain problem.Can save a large amount of flushing fluid (water), and the energy of heating flushing fluid and the required expense of transportation flushing fluid.

5, little to oil layer pollution, reply and produce soon.

The purpose of this utility model realizes by following measures: oil well is just being washed switch, comprises pressure regulation nut, pressure spring, central tube, cylinder sleeve and balanced seal cover.It is characterized in that having pressure spring and the cylinder sleeve with perforate with the outer surface cover of central tube of hole slot.

The utility model, for the clean-out service of oilfield maintenance, in the time of clean-out service, as long as pump truck is accessed to well head four-way, then will be produced after valve closing, just can carry out clean-out service.After well-flushing completes, open production valve, oil well returns to normal production automatically.This device is simple, convenient, has reduced the cost of production of oil extraction in oil field, has improved the output in oil field, for having brought certain economic benefit in oil field.Save a large amount of water resources and fuel energy simultaneously, thereby produced certain social benefit.

Accompanying drawing explanation: Fig. 1 is the structural representation that oil well is just being washed switch.

The specific embodiment: oil well is just being washed switch is to have pressure spring 2 and the cylinder sleeve 4 with perforate C with the outer surface cover of central tube 3 of hole slot B.In one end of central tube 3 by screw thread pair and pressure regulation nut 1 pressure of incompatible adjustment pressure spring 2 to cylinder sleeve 4 that matches.The other end of cylinder sleeve 4 and balanced seal cover 5 join.Between central tube 3, cylinder sleeve 4 and balanced seal cover 5, coordinate and all have sealing ring sealing.Central tube 3 joins by screw thread and the oil pipe column at two ends.

Its operating principle and using method are: the pressure (pressure of oily liquid in pipe) of central tube 3 interior liquid acts on the annulus area A of cylinder sleeve 4, in the time that the pressure of oily liquid in pipe on annulus area A reaches the tension force that pressure spring 2 sets, on starting, moves the tension force that cylinder sleeve 4 overcomes pressure spring 2, until the perforate C on cylinder sleeve 4 is corresponding with the hole slot B of central tube 3, in oil pipe, space communicates with ring set space, flushing fluid enters ring set space by oil pipe, starts to carry out oil pipe and just washes.After well-flushing completes, in oil pipe, fluid pressure reduces, and cylinder sleeve 4 restores the position of coming next time in the effect of pressure spring 2 tension force, and the hole slot B of central tube 3 is closed, and in oil pipe, space and ring set space are isolated, and return to normal production status in well.This device is to be just connected on oil pipe column in the time that oil well pump is gone into the well.Before going into the well, can realize by adjusting pressure regulation nut 1 requirement of the different depth of falling wells of this device, make this device can guarantee the production of normal oil well, smooth opening can guarantee well-flushing again time.

Claims

1. oil well is just being washed a switch, comprises pressure regulation nut, pressure spring, central tube, cylinder sleeve and balanced seal cover.It is characterized in that having pressure spring and the cylinder sleeve with perforate with the outer surface cover of central tube of hole slot.