CN201288534Y

CN201288534Y - Oil pumping apparatus for implementing self-cleaning function of sand filtering tube by elasticity of oil pipe

Info

Publication number: CN201288534Y
Application number: CNU200820065089XU
Authority: CN
Inventors: 王霞; 陈玉祥; 侯铎
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-09-11
Filing date: 2008-09-11
Publication date: 2009-08-12
Anticipated expiration: 2018-09-11

Abstract

The utility model relates to an oil pumping device which is used for the oil field plunger oil-well pump and can realize self cleaning function of sand filtering tube with elastic property of oil tube. The oil pumping device can improve the problems of short service lifetime of existing oil-well pump, low oil pumping efficiency and inferior sand prevention performance. The technical solution is that the upper part of upper pump barrel is installed with an upper plunger piston which is connected with an oil sucking rod. The base part of upper plunger piston is installed with a traveling valve. The middle part of upper pump barrel is installed with a fixed valve. The lower part of upper pump barrel is suspended with the sand filtering tube. The lower end of sand filtering tube is assembled with a lower plunger piston with a fixed lower part. The lower plunger piston is installed in the lower pump barrel and is fixed on a fixed fixture block. The oil pumping device which uses elastic property of oil tube for realizing self-cleaning function of sand filtering tube and the plunger oil-well pump are assembled and are suspended at the lower end of oil tube. The oil pumping device according to the utility model can eliminate the sand sticking caused by the accumulated sand on pump and the entering of sand into the part between plunger piston and pump barrel, reduces the cylinder scoring and abrasion of pump and prolongs the production period of oil well. The oil pumping device according to the utility model has a higher oil pumping efficiency and longer service lifetime, and is suitable to be used by various sandy wells.

Description

Utilize the oil pipe elastic energy to realize the oil rig of sand screen self-cleaning function

Technical field

The utility model relates to the oil pipe elastic energy of utilizing that is used for that the oil field plunger oil-well pump uses and realizes the oil rig of sand screen self-cleaning function, is particularly suitable for the sand content height, heavy oil wells exploitation that viscosity is big is used.

Background technology

The sand control measure that adopts mainly contains at present: mechanical sand control, chemical sand control, coking sand control and composite sand prevention.Wherein the most general method is exactly to realize sand control by the mode that the oil well pump lower end hangs sand screen.The shortcoming of conventional oil pumping method: the phase of being excused from a college course is short, application life is low, because the viscous crude one-way flow easily causes oil well pump sand card even stops production.And the anti-sand method of lower end suspension sand screen is compared with conventional oil pumping method, and the phase of being excused from a college course promotes to some extent, and sand screen sand plug problem has reduced the oil pumping pump efficiency.

Utilize the oil pipe elastic energy to realize that the oil rig of sand screen self-cleaning function has characteristics such as sand control card, sand control bury, anti-sand milling, the life-span is long, implementation method is simple, use is easy to maintenance.For the high oil well of sand content, still have higher oil recovery efficiency and long application life, thereby prolong the oil well production cycle, the raising of oilfield exploitation efficient is had big value and economic worth.

The sand screen sand control mainly is to select for use to have the good adhesive material of bonding capacity, the particulate matter that screening has certain degree of hardness is an aggregate, mix in proportion, fixed under certain conditions moulding, make and have higher-strength and infiltrative sand screen, and with other tool combinations G.I.H, aim at the sanding formation position, stop that reservoir sand enters in the flow string, thereby reduce the sand card of pump barrel and plunger.

Summary of the invention

The purpose of this utility model is: for improve existing oil well pump application life short, pumping efficiency is low, the shortcoming of sand control capability difference, improve oil well pump oil recovery efficiency and application life, the spy provides a kind of oil rig that utilizes the oil pipe elastic energy to realize the sand screen self-cleaning function.

To achieve these goals, the utility model is by the following technical solutions: a kind of oil rig that utilizes the oil pipe elastic energy to realize the sand screen self-cleaning function, form by last pump barrel, upper plug, travelling valve, standing valve, sand screen, lower plunger, following pump barrel, it is characterized in that: plunger is installed on the top in last pump barrel, connect sucker rod on the upper plug, the upper plug bottom is provided with travelling valve; Middle part at last pump barrel is provided with standing valve; Bottom at last pump barrel hangs sand screen; At the fixing lower plunger in assembling bottom, sand screen lower end, lower plunger is installed in down in the pump barrel, is fixed on the solid fixture block.This utilizes the oil pipe elastic energy to realize that the oil rig of sand screen self-cleaning function and plunger oil-well pump assembling hang on the oil pipe lower end.

Because oil pipe stand under load elastic stretching and unloading elastic shrinkage, cavity volume between sand screen bottom non-movable piston and the standing valve will be along with the upper and lower stroke movement of plunger from large to small, all follow a certain amount of viscous crude reverse flow when making plunger down stroke motion each time, promptly by the sand screen cavity after filtration sandpipe flow back to pit shaft again, oily stream will carry out backwash to sand screen in this process.

Because the effect of bottom non-movable piston, the continuous variation of oil pipe elongation will make a certain amount of viscous crude obtain enough pressure and flow to pit shaft again by sand screen.The backwash process of sand screen is promptly followed in such reverse flow process.

The beneficial effects of the utility model are: when this oil rig is used for sand well production, can eliminate because of long-pending sand and sand on the pump and enter the sand card that causes between plunger and the pump barrel, reduce scuffing of cylinder bore, the wearing and tearing of pump, thereby prolong the application life of oil well production cycle and pump; This oil rig is simple in structure, stable performance, have high oil extracting efficiency and long application life, is suitable for all kinds of sand wells and uses.

Description of drawings

Fig. 1 realizes the structural representation of the oil rig of sand screen self-cleaning function for the utility model utilizes the oil pipe elastic energy.

Among the figure: 1. sucker rod, 2. sleeve pipe is 3. gone up pump barrel, 4. upper plug, 5. travelling valve, 6. standing valve, 7. sand screen, 8. lower plunger 9. descends pump barrel, 10. solid fixture block.

The specific embodiment

The utility model is described in further detail below in conjunction with drawings and embodiments.

Shown in 1 figure, utilize the oil pipe elastic energy to realize sand screen self-cleaning function device, mainly by sucker rod 1, sleeve pipe 2, last pump barrel 3, upper plug 4, travelling valve 5, standing valve 6, sand screen 7, lower plunger 8, following pump barrel 9 and solid fixture block 10 are formed.Described upper plug 4 is fixed on the lower end of sucker rod 1, when sucker rod 1 and upper plug 4 move up and down, realize in the tubing string fluid column weight in loading on the travelling valve 5 and unloading, on standing valve 6, then form unloading and load, thereby finish the elastic shrinkage and the elastic elongation of tubing string on the pump barrel 3.Because lower plunger 8 is fixed on the sleeve pipe by solid fixture block 10, so the elastic shrinkage of tubing string and elastic elongation, to form the change of sand screen 7 inner chambers between standing valve 6 and the lower plunger 8 big and diminish, and the oil well fluid flows into the forward of sand screen sieve aperture and back flush is operated thereby finished.

Claims

1, a kind of oil rig that utilizes the oil pipe elastic energy to realize the sand screen self-cleaning function, form by last pump barrel, upper plug, travelling valve, standing valve, sand screen, lower plunger, following pump barrel, it is characterized in that: plunger (4) is installed on the top in last pump barrel (3), upper plug (4) is gone up and is connected sucker rod (1), and upper plug (4) bottom is provided with travelling valve (5); At the middle part of last pump barrel (3) standing valve (6) is set; Be hung with sand screen (7) in the bottom of last pump barrel (3); At the fixing lower plunger (8) in assembling bottom, sand screen (7) lower end, lower plunger (8) is installed in down in the pump barrel (9), is fixed on the solid fixture block (10).