CN2752424Y - Oil layer protecting energy conservation well-flushing device - Google Patents

Abstract

The utility model relates to an oil layer protecting energy saving well cleaning device which comprises a sealing and isolating device, wherein the lower end of the sealing and isolating device is connected with a single-flow valve, and the upper end of the sealing and isolating device is provided with well cleaning valve composed of an outer tube, a horizontal tube arranged in the outer tube, a lower vertical tube arranged on the horizontal tube, a valve seat arranged on the lower vertical tube, an upper vertical tube arranged at the upper part of the lower vertical tube, a spring cushion and a spring which are arranged in the upper vertical tube, an adjusting screw nail arranged on the spring cushion and a valve ball arranged between the spring and the valve seat. The upper end of the well cleaning valve is provided with a telescopic oil tube composed of an upper contact, a central tube, a central tube lower contact, a lower central tube, a press cap, a limiting ring and a packing set, and the upper end of the telescopic oil tube is provided with a back throwing valve composed of a lower contact, a valve cover connected with the lower contact and a valve seat and a valve ball which are arranged in the valve cover. The utility model has the advantages that dissolved impurities, such as waxy substances, colloidal substances, stratum sand, etc. in a well casing can be prevented from being squeezed into oil layers during the well cleaning process, well cleaning without pollution can be realized, no leakage of well cleaning liquid can be guaranteed and the oil production of oil wells and the quality of petroleum oil are guaranteed.

Description

The energy-conservation well washing apparatus of protection oil reservoir

Technical field

The utility model relates to the energy-conservation well washing apparatus of a kind of protection oil reservoir.

Background technology

Hot-washing wax remover is the temperature dissolving paraffin that utilizes flushing fluid, cleans down-hole wax deposition section, the oil pumper load is descended avoid Ka Jing.Existing well washing apparatus is to be made of packer and the single current valve that is connected the packer lower end.Avoid flushing fluid to enter oil reservoir by packer, prevent polluted reservoir in washing well process; Play a part to cut off flushing fluid by the single current valve, prevent that flushing fluid from pouring in down a chimney oil reservoir in oil pipe.But when clean-out service, the envelope because compression packer does not expand when going into the well, there is crawl in tubing string, the skin wrist formula packing element process of going into the well is existed scrape damage, influence packer and expands and seal; The direction that flushing fluid enters oil reservoir oil flow path direction when recovering the oil is opposite, under pump pressure, be the radial oil reservoir that enters, under the effect of flushing fluid temperature, dissolved impurity such as wax, colloid and reservoir sand in the pit shaft, just very easily be squeezed into oil reservoir, its seepage area increases progressively, and the high more radius to oil layer pollution and injury of pump pressure this moment is big more.After resuming production, under the prerequisite of seepage flow radially, the contaminant stream dynamic resistance of clamp-oning in the oil reservoir increases, and therefore, the oil reservoir flow conductivity reduces, and oil well output descends.

Summary of the invention

The purpose of this utility model is to solve the problems referred to above that prior art exists; provide a kind of and prevent that in the process of well-flushing dissolved impurity such as wax, colloid and reservoir sand are squeezed into oil reservoir, realize pollution-free well-flushing in the pit shaft, guarantee that flushing fluid does not have leakage, guarantees the energy-conservation well washing apparatus of protection oil reservoir of well oil output and oil quality.

The utility model is achieved in that it has a packer, be connected with the single current valve in the packer lower end, its special character is to be provided with the well-flushing valve in the packer upper end, and said well-flushing valve is the outer tube that is connected with packer by by pipe nipple, be arranged on the transverse tube in the outer tube, be arranged on the transverse tube and inner surface is provided with the lower standing tube of step, be arranged on the valve seat at lower standing tube step place, be arranged on the upper riser on lower standing tube top, be placed on spring pad and spring in the upper riser, be arranged on the adjustment screw on the spring pad, the valve ball that is arranged between spring and the valve seat constitutes; Upper end at the well-flushing valve is provided with telescopic oil tube, said telescopic oil tube be by with outer tube by top connection, the central tube that is arranged on top connection top that is threaded, the central tube lower contact that is arranged on central tube top, with the lower center tube of central tube lower contact external surface by being threaded, be sleeved on the central tube lower contact external surface and and constitute by the pressure cap that is threaded, spacing ring and the packing that is arranged on pressure cap and central tube gap location with lower center tube; Be provided with the back in the upper end of telescopic oil tube and throw valve, said back throw valve be by the stepped lower contact that is connected with lower center tube, with the lower contact external surface by be threaded and inner surface be provided with ladder the valve cover, be placed on valve cover inner surface ladder place and lean at the valve seat of lower contact upper surface and be placed on valve ball on the valve seat, the snap ring and the pressure ring that are arranged on the valve cover constitute.

The utility model has the advantages that:

1, because the energy-conservation well washing apparatus of this protection oil reservoir is to carry out clean-out service after cutting off oil reservoir, avoided flushing fluid to enter oil reservoir, not only reduced the consumption of flushing fluid but also avoided pollution, played the effect of protecting oil reservoir oil reservoir.

2, be lowered to the energy-conservation well washing apparatus of this protection oil reservoir in conjunction with clear inspection pipe, carry out effective well-flushing, can prolong the well cycle in winter, reach and increase oil, energy-conservation, the purpose that subtracts consumption.

The characteristics of the envelope that do not expand when 3, utilizing compression packer to go into the well by being connected of the interior telescopic oil tube of establishing spacing ring and packing, can prevent the tubing string wriggling, the damage problem of scraping of having avoided skin wrist formula packing element to go into the well and produce in the process, thus guaranteed the validity of packer.The energy-conservation well washing apparatus of this protection oil reservoir not only is suitable for shallow well, can also adapt to deep-well or carry out well-flushing in conjunction with chemical method.

4, throw valve owing to the back is set, play the bloated envelope effect of pump barrel on packer top; In washing well process, play anti-circulation well cleanup and prevent flushing fluid refluence effect by the well-flushing valve, when well-flushing by transverse tube on two port feed liquors, valve is opened, flushing fluid is gone into pump and is upwards returned and carry out well-flushing, can avoid flushing fluid to go into well during termination of pumping.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Among the figure: 1-pressure ring, 2-snap ring, 3-valve cover, 4-valve ball, the 5-valve seat, 6-lower contact, 7-lower center tube, the lower contact of 8-central tube, the 9-spacing ring, 10-packing, 11-pressure cap, 12-central tube, the 13-top connection, 14-adjustment screw, 15-spring pad, 16-upper riser, the 17-spring, 18-valve ball, 19-valve seat, 20-lower standing tube, the 21-transverse tube, 22-outer tube, 23-pipe nipple, 24-conehead, the 25-shop bolt, 26-clip spring seat, 27-shear pin, 28-O RunddichtringO, the 29-fluid cylinder, 30-jump ring, 31-lower contact, the 32-O RunddichtringO, 33-fluid cylinder head, the last packing element of 34-, the 35-gasket ring, packing element among the 36-, 37-central tube, the 38-top connection, 39-top connection, 40-valve ball, the 41-valve seat, 42-lower contact, 43-lower rubber cylinder.

The specific embodiment

As shown in the figure, the utility model has a pipe nipple 23, in pipe nipple 23 outer cover conehead 24 is housed, in pipe nipple 23 external surface bottoms by the lower contact 31 that has been threaded, external surface in lower contact 31 is set with clip spring seat 26, said clip spring seat 26 is fixed in the lower contact 31 by shear pin 27, in lower contact 31 bottoms by the central tube 37 that has been threaded, external surface at central tube 37 is set with fluid cylinder head 33, be set with packing element 34 successively at place, corresponding fluid cylinder head 33 lower surfaces on the central tube 37, gasket ring 35, middle packing element 36, lower rubber cylinder 43 is also fastening by top connection 38, said top connection 38 and central tube 37 are by being threaded, the said clip spring seat 26 outside shop bolt 25 suit fluid cylinders 29 that pass through, at spring base 26, lower contact 31 is respectively arranged with O RunddichtringO 28 and jump ring 30 with the contact surface of fluid cylinder 29, fluid cylinder 29 is provided with O RunddichtringO 32, described pipe nipple 23 with fluid cylinder head 33 contact surfaces, conehead 24, shop bolt 25, clip spring seat 26, shear pin 27, O RunddichtringO 28, fluid cylinder 29, jump ring 30, lower contact 31, O RunddichtringO 32, fluid cylinder head 33, last packing element 34, gasket ring 35, middle packing element 36, lower rubber cylinder 43, central tube 37 and top connection 38 constitute packer.Is stair-stepping top connection 39 in top connection 38 bottoms by the inner surface that has been threaded, at top connection 39 inner surfaces by the lower contact 42 that has been threaded, valve seat 41 is placed at ladder place in top connection 39, valve seat 41 leans in lower contact 42 upper surfaces, be placed with valve ball 42 on valve seat 41, described top connection 39, valve ball 40, valve seat 41 and lower contact 42 constitute the single current valve.In pipe nipple 23 upper surfaces by the outer tube 22 that has been threaded, in outer tube 22, be welded with both sides and establish the transverse tube 21 of port, have the lower standing tube interface on said transverse tube 21 sidewalls, on described lower standing tube interface, be welded with lower standing tube 20, the inner surface of lower standing tube 20 is provided with step, step place at lower standing tube 20 is placed with valve seat 19, is connected with upper riser 16 on lower standing tube 20 tops by internal thread, by upper riser 16 valve seat 19 is held out against.Said upper riser 16 upper port are provided with the inside edge, in upper riser 16, be placed with spring 17, between the inside edge of spring 17 and upper riser 16, place spring pad 15, adjustment screw 14 is installed on spring pad 15, between spring 17 and valve seat 19, be placed with valve ball 18, by adjust screw 14 can adjust valve ball 18 on move distance.Described adjustment screw 14, spring pad 15, upper riser 16, spring 17, valve ball 18, valve seat 19, lower standing tube 20, transverse tube 21 and outer tube 22 constitute the well-flushing valve; In outer tube 22 upper surfaces by the top connection 13 that has been threaded, top connection 13 inner surface tops are by the central tube 12 that has been threaded, central tube 12 upper port are by the central tube lower contact 8 that has been threaded, at central tube lower contact 8 external surfaces by the lower center tube 7 that has been threaded, be set with pressure cap 11 at central tube lower contact 8 external surfaces, pressure cap 11 and following center basketball match 7 are by being threaded, be placed with spacing ring 9 and packing 10, described lower center tube 7 at pressure cap 11 and central tube 12 gap locations, central tube lower contact 8, spacing ring 9, packing 10, pressure cap 11, central tube 12 and top connection 13 constitute telescopic oil tube.Be provided with the back in the upper end of telescopic oil tube and throw valve, said back throw valve be by with the stepped lower contact 6 of lower center tube 7 by being threaded, with lower contact 6 external surfaces by be threaded and inner surface be provided with ladder valve cover 3, be placed on valve cover 3 inner surface ladder places and lean at the valve seat 5 of lower contact 6 upper surfaces and be placed on the valve ball 4 on the valve seat 5, the snap ring 2 that is arranged on valve cover 3 upper ends and pressure ring 1 and constitute, be provided with the card edge at valve cover 3 inner surfaces near the port, said snap ring 2 and pressure ring 1 are stuck in the card of valve cover 3 inner surfaces along last.

During use, should protect the energy-conservation well washing apparatus of the oil reservoir above position of the inner oil reservoir of oil pipe of packing into, the energy-conservation well washing apparatus of this protection oil reservoir is because the weight of top oil pipe is cut off shear pin 27 automatically, clip spring seat 26 drives fluid cylinder 29 and moves up, packing element 34, middle packing element 36, lower rubber cylinder 43 in the extruding make packer that oil well is expanded and seal; When oil well need clean, sucker rod and plunger are proposed, in oil well, add flushing fluid by force (forcing) pump, in the flow process of oil well bottom, realize cleaning at flushing fluid to oil pipe, when the flushing fluid of oil pipe outside of flowing through gathers the pressure that reaches certain in the shaft bottom, flushing fluid is entered in the lower standing tube 20 and with valve ball 18 by the transverse tube 21 of well-flushing valve and backs down, valve ball 18 is moved up, flushing fluid through telescopic oil tube, after throw valve and flow out outside the well, flushing fluid according to the said process circulation, is realized the cleaning to oil well in oil well.

Claims (1)

1, the energy-conservation well washing apparatus of a kind of protection oil reservoir, comprise packer, be connected with the single current valve in the packer lower end, it is characterized in that: be provided with the well-flushing valve in the packer upper end, said well-flushing valve is by the outer tube (22) that is connected with packer by pipe nipple (23), be arranged on the transverse tube (21) in the outer tube (22), be arranged on that transverse tube (2 1) is gone up and inner surface is provided with the lower standing tube (20) of step, be arranged on the valve seat (19) at lower standing tube (20) step place, be arranged on the upper riser (16) on lower standing tube (20) top, be placed on spring pad (15) and spring (17) in the upper riser (16), be arranged on the adjustment screw (14) on the spring pad (15), the valve ball (18) that is arranged between spring (17) and the valve seat (19) constitutes; Upper end at the well-flushing valve is provided with telescopic oil tube, said telescopic oil tube be by with outer tube (22) by top connection (13), the central tube (12) that is arranged on top connection (13) top that is threaded, the central tube lower contact (8) that is arranged on central tube (12) top, with the lower center tube (7) of central tube lower contact (8) external surface by being threaded, be sleeved on central tube lower contact (8) external surface and with the pressure cap (11) of lower center tube (7) by being threaded, be arranged on the spacing ring (9) and packing (10) formation of pressure cap (11) and central tube (12) gap location; Be provided with the back in the upper end of telescopic oil tube and throw valve, said back throw valve be by the stepped lower contact (6) that is connected with lower center tube (7), with lower contact (6) external surface by be threaded and inner surface be provided with ladder valve cover (3), be placed on valve cover (3) inner surface ladder place and lean at the valve seat (5) of lower contact (6) upper surface and be placed on valve ball (4) on the valve seat (5), be arranged on snap ring (2) and pressure ring (1) formation on the valve cover (3).

Images