CN2213228Y

CN2213228Y - Through plug stick well-flushing valve

Info

Publication number: CN2213228Y
Application number: CN 94245650
Authority: CN
Inventors: 王国丙; 陈现华; 周洪志; 倪宝群; 王雅黎; 孙国悦; 盛鸿飞
Original assignee: Luda Energy Source Tech Development Co Beijing
Current assignee: Luda Energy Source Tech Development Co Beijing
Priority date: 1994-11-30
Filing date: 1994-11-30
Publication date: 1995-11-22
Anticipated expiration: 2004-11-30

Abstract

The utility model relates to a through plug rod well-flushing valve. The utility model is provided with a valve body 1 and a lower joint 6. The inner part of the valve body 1 is provided with a spring 5 and a sliding piston 4; the piston 4 can be acted and pressed on the sealing surface of the valve body 1 by the spring 5; the piston 4 is provided with a step 3; the valve body 1 is provided with a through hole 2; when the well is flushed, the pressure of the annular space of a sleeve pipe and an oil pipe is increased to act on the step 3 so as to make the piston moved downwards; therefore, the sealing surface can not be sealed and the well-flushing liquid can enter the oil pipe through the hole 2 so as to form the well-flushing circulation; the well-flushing valve can be connected with the middle part of the oil pipe to the proper depth of the well, so that the utility model can realize the well-flushing and medicine-charging problem; the middle of the well-flushing valve can also pass through an oil well pump and an oil suction rod.

Description

Through plug stick well-flushing valve

The utility model relates to from well producing oil, gas, water, solubilized maybe can dissolve material or slurry of mineral, particularly the valve gear of well or well.

The oil-producing well in oil field, because the content of wax in the crude oil, behind the production certain hour, meeting wax deposition in the oil pipe, these wax deposition diminish the internal diameter of oil pipe so influence crude output, and existing solution is to carry out wax removal, a kind of method is with paraffin scraper wax to be wiped off, and another kind of method is to carry out well-flushing.Existing well washing apparatus is packer to be arranged under between near above the oil reservoir sleeve pipe and oil pipe, has flushing valve on the oil pipe above the packer, because flushing valve itself can not be by the piston and the sucker rod of oil well pump, so flushing valve can only descend below the oil well pump, like this can only be in the degree of depth of whole well depths during well-flushing well-flushing, and it is higher in the deep of well owing to temperature, few or the wax deposition not of wax deposition, often do not need well-flushing, so the power of full degree of depth well-flushing, flushing fluid, material resources, manpower are wasted all very big, also cause the pollution of flushing fluid to the stratum, duration of well flushing is also very long.

The purpose of this utility model provides a kind of centre can pass through oil well pump piston and sucker rod, can be installed in the normally closed type that also can open automatically on the oil pipe of top, oil well pump operating position and cross the stopper rod flushing valve, thereby can carry out well-flushing from the certain position of oil well pump top by the pressure of flushing fluid.

The purpose of this utility model realizes by following technical scheme, cross the stopper rod flushing valve and have valve body and lower contact, valve body is connected with screw thread with lower contact, it is characterized in that having a spring and piston slidably at valve inner, piston is pressed on the sealing surface of valve body by spring action, also has step on the piston, on the valve body above this step, has through hole, the fluid pressure of the annular space between sleeve pipe and the oil pipe acts on the step and descent of piston, sealing surface are no longer sealed and forms path in annular space and the oil pipe.

Below in conjunction with drawings and Examples the stopper rod flushing valve of crossing of the present utility model is described in detail.

Fig. 1 is the elevation that the utility model is crossed the stopper rod flushing valve, and wherein part is analysed and observe;

Fig. 2 is the elevation that the utility model is crossed the another kind of embodiment of stopper rod flushing valve valve body.

As Fig. 1, cross the stopper rod flushing valve and have valve body 1 and lower contact 6, valve body 1 can be made of one, as shown in Figure 1, also can be to be threaded by top connection 8 and central tube 9 usefulness as shown in Figure 2 and to form with screw 7 tightenings, valve body 1 and lower contact 6 usefulness are threaded togather and with screw 7 tightenings, and valve body and lower contact two ends have that screw thread is connected with oil pipe and the certain position that is positioned at oil pipe, can be positioned at the certain depth place of well.One piston 4 is slidably arranged in the valve body 1, has slide plane between piston 4 and valve body 1 and the lower contact 6, piston 4 is pressed on the sealing surface of valve body 1 by spring 5 effects, but sealing surface sphere, the also conical surface, the top of piston 4 have step 3 and and the internal diameter of valve body 1 between a cavity is arranged, on the valve body 1 at cavity place, have through hole 2, the internal diameter of the internal diameter of piston and valve body 1 and lower contact 6 is equal to or greater than the internal diameter of the oil pipe that is connected, when normal oil recovery, piston 4 is pressed on the sealing surface by spring 5, therefore in the oil pipe, do not communicate outward, when well-flushing, flushing fluid is pumped into by the annular space between sleeve pipe and the oil pipe, originally be full of liquid in the well, so annular space pressure increases, power on acting on step 3 is during greater than the power of spring 5, piston 4 moves down and sealing surface is no longer sealed, liquid is entered in the oil pipe by hole 2, and in oil pipe, upwards return ground, flushing fluid has been replaced and has been formed the circulation of flushing fluid behind the liquid in the well and finish clean-out service, after stopping well-flushing, piston 4 recovers sealing by the effect of spring 5, the operation of can pumping again, when use stopper rod flushing valve excessively of the present utility model well-flushing, liquid in the well of flushing valve bottom does not circulate, only in the well on flushing valve top, carry out well-flushing, therefore the well-flushing degree of depth is more shallow, power and flushing fluid have been saved, manpower and time, with the supporting use of other instruments, can realize well-flushing and dosing problem under the different depth, simultaneously can reduce the pollution of flushing fluid to the stratum, the internal diameter that the utility model is crossed the stopper rod flushing valve is equal to or greater than pipe aperture, oil well pump and sucker rod can freely pass through, not influencing rising of oil well pump goes into the well and pumps operation, very convenient, saved manpower, material resources, time.

Claims

1, a kind of stopper rod flushing valve of crossing, have valve body 1 and lower contact 6, it is characterized in that having in valve body 1 inside a spring 5 and piston 4 slidably, piston 4 is pressed on the sealing surface of valve body 1 by spring 5 effects, piston 4 has step 3, has through hole 2 on the valve body above this step 1.

2, the stopper rod flushing valve of crossing as claimed in claim 1 is characterized in that said valve body 1 is made up of top connection 8 and central tube 9.