CN103670342A - Downhole viscous liquid pumping device - Google Patents

Abstract

The present invention provides a viscous liquid pumping device for a well which can effectively pump out viscous liquid deep in a narrow space. The device comprises a device main body, an air hole on the upper part of the device, and a check valve at the bottom of the device. The main body of the device has good airtightness. The air hole on the upper part of the device can be selected to be connected to the atmosphere or to a vacuum pump according to specific conditions. A hole is opened around the middle of the bottom panel of the device as the liquid inlet, and a sealing cover that can completely cover the liquid inlet is fixedly connected with a bolt. The bolt passes through the center hole at the bottom of the device, and a nut is screwed on the bottom of the bolt. Make a check valve. When the device is put into the liquid to be extracted, the sealing cover is lifted under the action of the external liquid pressure, and the liquid can flow into the device; Covering the bottom hole, the liquid cannot flow out of the device, so as to achieve the function of the check valve. The viscous liquid in the deep well can be extracted simply and effectively by using the invention.

Description

A kind of well viscous liquid draw-out device

Affiliated technical field

The present invention relates to extract the device of narrow space depths viscous liquid, particularly a kind of well viscous liquid draw-out device.

Background technology

In engineering practice, often can run into need to extract viscous liquid in well (as, oil, pitch, paraffin etc.) a difficult problem, this liquid viscosity is large.In conventional method, when running into the extraction branch problem of liquid, conventionally adopt the method for pumping to solve.For viscous liquid, conventionally adopt viscous liquid pump directly to extract viscous liquid, this type of pump can extract viscous liquid, and can bear higher temperature, but is having larger restriction aspect the extraction degree of depth, cannot be from effectively extracting liquid compared with depths; For degree of depth problem, conventionally adopt deep well pump to carry out extracting liquid, this type of pump can extract depths liquid, but cannot extract viscous liquid, and when well head is narrow and small, deep well pump industry cannot be used simultaneously.So, use conventional methods and extract this class I liquid I, operating difficulties, even unfeasible.

Summary of the invention

For success extracts depths viscous liquid in well effectively, the invention provides a kind of well viscous liquid draw-out device.

The technical solution adopted for the present invention to solve the technical problems is: described device forms by installing top pore, apparatus main body liquid storage part and bottom of device flap valve.Described device integral body is long and narrow cylindrical shape, external diameter 10cm-30cm, and height 1m-3m, wall thickness 3mm-5mm, can put into well completely.At device top and bottom, have cover plate that device is sealed, in device top blind flange, perforate arranges pore, and in device bottom surface, cover plate arranges flap valve.Described device bottom surface cover plate radius equals apparatus main body external diameter, and at device bottom panel center drilling, around center hole, radius is 1/2R _inand 1/4R _in(R _infor apparatus main body internal diameter) circumference on to open 4-8 hole be liquid entrance, liquid entrance aperture is 10mm-30mm, use Radius is less than apparatus main body internal diameter and can covers the circular seal cover plate of inlet completely, cover sheet thickness 2mm-5mm, sealing cover plate is fixedly connected with a screw rod end, screw rod bore is slightly less than bottom panel center hole bore, and by the screw rod other end, through bottom of device center hole, the nut of screwing in screw rod bottom forms bottom of device flap valve.In use, cover plate can be up and down under stressed effect, when device is inserted liquid, at hydraulic action lower seal cover plate by jack-up, in liquid energy inflow device; During withdrawing device, in device fluid pressure effect lower seal cover plate cover downwards bottom hole, liquid cannot bleeder, with this, reaches the effect of flap valve.Described device bottom surface flap valve is connected in the following ways with apparatus main body: at uniform 4 junction plates for the evagination that connects of bottom panel surrounding, at junction plate center drilling and at apparatus main body corresponding part, do identical junction plate, use is connected flap valve through junction plate connecting bolt with apparatus main body, during connection, between arranges rubber gasket.Device top arranges pore, if liquid viscosity to be extracted is lower, this pore can directly be connected with atmosphere; If liquid viscosity to be extracted is higher, this pore can be bled to device by external vacuum pump, makes the inner extraction speed that forms negative pressure quickening viscous liquid of device.

When viscous liquid viscosity to be extracted is lower, during extraction, can not be attached in a large number on device outer wall, be convenient to device and clean while carrying out with next step extraction work, conventionally not external vacuum pump, directly device is sunk in viscous liquid, the inside and outside formation of device liquid pressure is poor, in viscous liquid access to plant.

When viscous liquid viscosity to be extracted higher, during extraction, can adhere in a large number on device outer wall, being not easy to device cleans while carrying out with next step extraction work, common external vacuum pump, only partial devices is submerged in viscous liquid, the external vacuum pump of top pore, bleeds to device afterwards, in device, form negative pressure, in viscous liquid access to plant.

When liquid viscosity to be extracted is very high, surpass critical viscosity μ _face, use this device cannot guarantee extraction efficiency, now can use the modes such as heating to reduce liquid viscosity to critical viscosity, convenient extraction.

Wherein, described critical viscosity μ ₀(Pas): ${\mathrm{\&mu;}}_0=\frac{2}{3}(P_B-0.9{\mathrm{\&rho;}}_L\mathrm{gh}-\frac{{\mathrm{<figure-callout\; id="1"\; label="F"\; filenames="131120134752.png"\; state="\{\{state\}\}">F</figure-callout>}}_1}{{\mathrm{\&pi;r}}^2})\frac{r^2}{7.2\stackrel{\&OverBar;}{v}h}$

P _b---the final vacuum that the vacuum pump that adopts during extraction can reach, can determine at vacuum pump nameplate or according to vacuum pump exhaustive test;

F ₁---the power that device for opening bottom check valve needs, in the present invention,

R _b---bottom of device check valve seal cover plate radius;

T _b---bottom of device check valve seal cover sheet thickness;

ρ _l---fluid density to be extracted.

ρ _c---the density of material of producing device, is used the metal material such as steel conventionally;

---during Liquid extracting, at the mean flow rate of vertical direction, according to Specific construction, to extracting the requirement of speed, determine;

R---apparatus main body internal diameter;

H---device height.

The invention has the beneficial effects as follows, this well is simple in structure with viscous liquid draw-out device, operation simple and feasible, with low cost, be not subject to a great extent the restriction of well head size and the degree of depth, be applicable to the extraction of most of viscous liquid, can extract simply and effectively viscous liquid in deep-well.

Accompanying drawing explanation

Fig. 1 device unitary construction figure.

Fig. 2 bottom of device flap valve sectional drawing.

Fig. 3 device bottom panel detail drawing and perforate distribution detail drawing.

State diagram when Fig. 4 bottom of device has just immersed liquid to be extracted.

State diagram during Fig. 5 device extracting liquid.

State diagram after Fig. 6 device extracts.

System works figure when Fig. 7 is used vacuum pump.

In figure, 1-apparatus main body, 2-device top pore, 3-bottom of device flap valve, 4-vacuum pump, 5-deep-well, 6-liquid to be extracted, 7-device bottom panel and apparatus main body bolt joint, 8-device bottom panel hole seal cover board (rubber gasket can be set), 9-device bottom panel, the bolt that 10-is connected with seal cover board.

The specific embodiment

Below in conjunction with accompanying drawing, the present invention is described in further details:

In Fig. 1, well has pore (2) with viscous liquid draw-out device top, opens wide at ordinary times, is connected if desired with vacuum pump, and device is bled, and bottom of device is flap valve (3).In Fig. 2, bottom of device flap valve (3) comprises device bottom panel (9), installs (10) three major parts of bolt that bottom panel hole seal cover board (8) is connected with seal cover board.The upper hole-opening of device bottom panel (9) is liquid entrance, it on hole, is a seal cover board (8) that bottom surface hole can be covered completely, seal cover board (8) is fixedly connected with a stay bolt (10), bolt is passed to device bottom panel (9) center hole, the nut of screwing in bolt bottom, makes the seal cover board can be up and down in the inner certain limit of device.Device bottom panel (9) is used jointing (7) to be connected with apparatus main body (1), and jointing (7) connects connecting bolt for adopting, and while connecting, between arranges rubber gasket and guarantees seal simultaneously.

Described device bottom surface flap valve is connected in the following ways with apparatus main body: bottom panel (9) surrounding uniform 4 for the junction plate of the evagination that connects and at junction plate center drilling, in apparatus main body bottom, divide and do identical junction plate with bottom panel corresponding connection parts, using this as jointing (7), use is connected flap valve through jointing (7) connecting bolt with apparatus main body, during connection, between arranges rubber gasket.In device use procedure, if while finding the situations such as in device, viscous liquid stops up, and bottom surface flap valve (3) is impaired, can, easily by bottom panel dismounting, be convenient to the cleaning of device inside and the maintenance of flap valve (3).

When viscous liquid viscosity to be extracted is lower, during extraction, can not be attached in a large number on device outer wall, be convenient to device and clean while carrying out with next step extraction work, can not use vacuum pump.When concrete operations are used, device is directly put into liquid to be extracted, submergence is about 90% of apparatus main body height,, under the poor effect of the inside and outside liquid pressure of device, seal cover board (8) jack-up that made progress, flap valve is opened, and liquid enters in device, as shown in Figure 5.By device, when taking out in deep-well, seal cover board (8) is subject to the pressure-acting of liquid in auto levelizer, and automatic cover is shared the hole of valve bottom panel (9), and flap valve is closed, and in holdout device, liquid flows out, as shown in Figure 6.After withdrawing device, manually bottom of device flap valve cover plate (8) jack-up can be emitted liquid in device.

When viscous liquid viscosity to be extracted is higher, during extraction, can adhere in a large number on device outer wall, be not easy to device and clean while carrying out with next step extraction work, can use vacuum pump, during below for use vacuum pump, this device extracts the technological process of the interior liquid of deep-well:

1. measure liquid viscosity to be extracted, when this viscosity is greater than critical viscosity μ _facetime, by modes such as heating, reduce liquid viscosity.And guarantee that, in whole extraction process, liquid viscosity is all below critical viscosity.

2. according to the degree of depth extracting, select the flexible pipe of bleeding of appropriate length, vacuum pump is connected with device top pore (2) evacuating valve.

3. device is put into deep-well, as shown in Figure 7.Device bottom surface flap valve and partial devices main body are submerged in liquid to be extracted (6), submerged depth

wherein, r is apparatus main body internal diameter; L is the well head length of side.Now, bottom of device check valve seal cover plate (8) closed cover is shared the hole of bottom panel (9), as shown in Figure 4.

4. open vacuum pump, device is bled.In device in negative pressure and well under the pressure-acting of liquid to be extracted, seal cover board (8) the quilt jack-up that made progress, flap valve (3) is opened, and liquid is extracted and enters in device, as shown in Figure 5.Observe reading on vacuum pump air gauge, when vacuum pump air gauge reading rises to the final vacuum P that vacuum pump can reach gradually _pumptime, the pitch of submergence section extracts complete, stops bleeding.

5. device is taken out in deep-well, now seal cover board (8) is subject to the pressure-acting of liquid in auto levelizer, and automatic cover is shared the hole of valve bottom panel (9), and flap valve is closed, and in holdout device, liquid flows out, as shown in Figure 6.

6. device is taken out after deep-well (5), device for opening top air vent ventilation outside well, afterwards, the bolt (10) that upwards promotion is connected with seal cover board (8), opens flap valve, and liquid in device is discarded in retracting device.

7. repeating step 2～6, extracted gradually the interior liquid of deep-well (5).

8. on-the-spot cleaning.

Claims (2)

1. A viscous liquid extraction device for wells, comprising a liquid storage part of the main body of the device, an air hole at the top of the device and a check valve at the bottom of the device, characterized in that: the device is in the shape of a long and narrow cylinder as a whole, with an outer diameter of 10cm-30cm and a height of 1m -3m, can be completely put into the well, there are cover plates on the top and bottom of the device to close the device, holes are set on the top cover plate of the device, and check valves are set on the bottom cover plate of the device, the radius of the bottom cover plate of the device is equal to The outer diameter of the main body of the device is a hole in the center of the bottom panel of the device, and 4-8 holes are opened on the _{circumference} of the central hole with a radius of 1/ _2R and 1/4R (R _is the inner diameter of the device main body) for liquid inlet and outlet. Use a circular sealing cover whose radius is smaller than the inner diameter of the main body of the device and can completely cover the liquid inlet and outlet. The sealing cover is fixedly connected to the end of a screw. The diameter of the screw is slightly smaller than the diameter of the hole in the center of the bottom panel. Through the center hole at the bottom of the device, a nut is screwed on the bottom of the screw rod to form a check valve at the bottom of the device. 2. The viscous liquid pumping device for wells according to claim 1, characterized in that the hole diameter of the liquid inlet and outlet is 10mm-30mm.

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