CN201121572Y - Bias-wearing proof anti-sand gas-tight multi-function oil well pump - Google Patents

Abstract

A multifunctional oil-well pump with camber wearing resistance, sand prevention and vapor resistance comprises an eccentric reducer coupling, a tubing nipple, a sand depositing pipe, an inner pump barrel and an outer pump barrel. The inner pump barrel is fixedly arranged at one side inside the outer pump barrel, the lower end of the inner pump barrel is provided with an oil inlet pipe. The inner pump barrel is provided with a fixing valve, a travelling valve and a piston inside, and the travelling valve is fixed at the lower end of the piston. The other fixing valve is arranged between the inner wall of the outer pump barrel and the outer wall of the inner pump barrel, and an oil inlet at the lower end of the fixing valve is inserted in an inserting hole of the oil inlet on the wall of the inner pump barrel. The sand depositing pipe is connected with the lower end of the outer pump barrel by a screw thread, the upper end of the inner pump barrel is connected with an upper oil pipe, and the upper oil pipe is provided with an opening. The upper end of the outer pump barrel is connected with the tubing nipple by a screw thread, and the upper end of the tubing nipple is connected with the eccentric reducer coupling by a screw thread. The multifunctional oil-well pump adopts double flow passages, the pump efficiency of which is one-time of that of a common pump, the multifunctional oil-well pump can effectively prevent the oil wall from camber wearing due to the descending liquid column resistance, has fine effects for sand preventing and gas affect preventing, lowers the fault rate, and greatly improves the well crude oil yield.

Description

Anti-eccentric wear sand control gas-tight multifunctional oil-well pump

Technical field

The utility model relates to a kind of pumping unit, concrete relates to a kind of oil well pump.

Background technique

Pumping unit in process of production, connect pumping unit on the sucker rod, under connect oil well pump, in the pipe of down-hole, carry out the shift reciprocately of up-down stroke, the R a T contact produces friction in the sucker rod movement process, sucker rod partial wear appears, oil field development middle and later periods particularly, along with well water, shake out, the influence of factor such as output, cover change, the side-abrasion of rod string aggravation progressively rises the well rate of lying because of pipe leaks, bar is disconnected, and the average pump detection period of oil well shortens, these problems have seriously restricted the raising of crude oil production efficient, influence the oil well ordinary production.Analysis causes the reason of eccentric wear to mainly contain hole deviation, meander effect, curvature effect, jarring effect, well head eccentric wear etc.Wherein the eccentric wear that causes with the rod string curvature effect is the most serious.The curvature effect of rod string refers to pumping unit in down stroke, because the frictional force between lining and plunger, the resistance that the extraction flow of liquid is crossed traveling valve make rod string be subjected to a kind of axial pressure, are in the state of being squeezed, sinus-curve takes place, and forms eccentric wear.

At different eccentric wear reasons, the anti-eccentric wear technology that adopts mainly contains at present:

1) centralizer: by on the box cupling of sucker rod or body, having increased deflection abrasion preventing centralizer that sucker rod and oil pipe is concentric, prevent that rod tube from directly contacting the generation eccentric wear.

2) weighted lever: mainly be the method that increases the weight of to cut or polish jade with an emery wheel in the sucker rod bottom, increase bottom gravity, reduce the eccentric wear that rod string generation meander phenomenon and sinus-curve phenomenon cause.

3) high-strength abrasion-proof box cupling:,, use the wear-resisting box cupling of high-strength low friction resistance and can alleviate the frictional force between box cupling and oil pipe and reduce wearing and tearing so it is big that the eccentric wear probability takes place because box cupling at first contacts with oil pipe.

4) rotation sucker rod: mainly be mounted in the ratchet mechanism on the well head rope hanger, whole pumping rod is rotated to an angle within a certain period of time, prevented that effectively the sucker rod folk prescription from damaging to eccentric wear.

5) rotation well head: mainly be after well head is installed, rotation once makes 12 °～15 ° of OIH pipe rotations in the unit time, and oil pipe and sucker rod folk prescription are changed to the contact position.

6) anti-inclined to one side well head: mainly solve because the contradiction of wellhead assembly and down-hole oil tube center decentraction has the better prevention effect to eccentric wear and the sucker rod top eccentric wear that reduces polished rod.

7) anti-eccentric wear pump: anti-eccentric wear pump is meant by transforming pump structure, makes stressed change of piston in pump barrel, thereby reduces the resistance of piston when down stroke, realizes anti-eccentric wear.It is different from the generation that other anti-eccentric wear technology part is fundamentally to have prevented eccentric wear, is optimal anti-eccentric wear solution.

Anti-eccentric wear pump in the past can be good at realizing anti-eccentric wear, but because pump itself, under the formation condition of complexity, and particularly in the oil well that shakes out, cisco unity malfunction.

Summary of the invention

The purpose of this utility model provides a kind of high pumping well usefulness of coagulating oil, viscous crude, low production fluid that is applicable to, the oil well pump with good anti-eccentric wear, sand control, gas-tight performance.

The technological scheme that adopts is:

Anti-eccentric wear sand control gas-tight multifunctional oil-well pump comprises eccentric sub-coupling, tubing nipple, outer pump barrel, interior pump barrel, piston, traveling valve, sand sediment pipe, standing valve 8 and standing valve 12.

Interior pump barrel is installed in the outer pump barrel, and there is oil inlet pipe interior pump barrel lower end, in the oil inlet pipe jack on outer pump barrel one sidewall of oil inlet pipe front end insertion.Be set with standing valve 8 in interior pump barrel bottom, in interior pump barrel, be positioned at standing valve 8 tops and be provided with piston, be set with traveling valve in the piston lower end.Be set with standing valve 12 between pump barrel inwall and the interior pump barrel outer wall outside.In the filler opening jack in the filler opening of standing valve 12 inserts on the pump barrel wall.Be set with the sand control cap in standing valve 12 upper ends.The sand sediment pipe upper end is threaded with outer pump barrel lower end with screw thread.Interior pump barrel upper/lower terminal is fixedlyed connected by clamping bolt respectively with outer pump barrel.Interior pump barrel upper end is connected with last oil pipe with screw thread.The tubing nipple two ends are connected with eccentric sub-coupling with outer pump barrel upper end with screw thread respectively.

Interior pump barrel outer wall and outside between the pump barrel inwall, be positioned at standing valve 12 tops, fixedly install another standing valve 16.

One, the working principle of anti-eccentric wear sand control gas-tight multifunctional oil-well pump:

When 1, up, the working condition of pump:

Sucker rod drive piston moves upward when up, and traveling valve 7 cuts out, and standing valve 8 is opened, and standing valve 12 cuts out, and piston drains into oil pipe on the pump with pump upper chamber liquid, and well liquid enters interior pump barrel through oil inlet pipe 15 simultaneously;

The working condition of pump when 2, descending

Sucker rod drive piston moves downward when descending, and traveling valve 7 is opened, and standing valve 8 cuts out, and standing valve 12 is opened, and piston bottom well liquid enters inside and outside pump barrel communicating space through traveling valve 7 and 12 two runners of standing valve.

Two, the anti-eccentric wear of pump, sand control, gas-tight principle:

1, the anti-eccentric wear principle of pump

High coagulating in oil, the thick oil well is because the eccentric wear that the curvature effect of rod string produces accounts for greatly.What double flow channel eccentric wear prevention pumping pump mainly solved is exactly the eccentric wear that this situation produces.

There is a neutral point in rod string when down stroke, the above roofbolt weight of neutral point is born by suspension point, is subjected to tension, can not produce deflection; The roofbolt pressurized that neutral point is following is as concentrated axial pressure P _uWhen increasing to a certain degree, sucker rod will produce deflection in oil pipe.

Neutral point place stress balance formula: G _H=P _u

$G_H=\frac{{\mathrm{\&pi;<figure-callout\; id="2"\; label="d"\; filenames="Y20072001592500091.png,Y20072001592500101.png"\; state="\{\{state\}\}">d</figure-callout>}}^2}{4}{\mathrm{\&rho;}}_r\mathrm{gH}$

G _H: bottom, neutral point place roofbolt weight, N;

D: sucker rod diameter, m;

ρ _r: sucker rod density, kg/m ³

G: gravity accleration, get 9.8m/s ²

H: neutral point is with the roofbolt length down to plunger, m;

Concentrate axial pressure P _uMainly comprise: the buoyancy P that rod string is suffered _v, the semi-dry friction power P between lining and plunger _f, the extraction flow of liquid crosses the resistance Pr of traveling valve.

P _u＝P _v+P _f+P _r

Wherein, flow of liquid is crossed the resistance of traveling valve:

$P_r=\frac{{1.5n}_k}{{728u}^2}*\frac{F^3(1-f_0/F)}{f_0^2}*\frac{{\left(\mathrm{Sn}\right)}^2}{g}{\mathrm{\&rho;}}_{f}g$

n _k: the number of traveling valve

U: flow coefficient

F: the gross area of pump plunger

f ₀: the basal area of the valve seat orifice of moving about

S: stroke

N: jig frequency

By: G _H=P _u

Draw the neutral point formula:

$H=\frac{4}{{\mathrm{\&pi;<figure-callout\; id="2"\; label="d"\; filenames="Y20072001592500091.png,Y20072001592500101.png"\; state="\{\{state\}\}">d</figure-callout>}}^2{\mathrm{\&rho;}}_{r}g}\&CenterDot;P_u=\frac{4}{{\mathrm{\&pi;<figure-callout\; id="2"\; label="d"\; filenames="Y20072001592500091.png,Y20072001592500101.png"\; state="\{\{state\}\}">d</figure-callout>}}^2{\mathrm{\&rho;}}_{r}g}\&CenterDot;(P_v+P_f+P_r)$

$=\frac{4}{{\mathrm{\&pi;<figure-callout\; id="2"\; label="d"\; filenames="Y20072001592500091.png,Y20072001592500101.png"\; state="\{\{state\}\}">d</figure-callout>}}^2{\mathrm{\&rho;}}_{r}g}\&CenterDot;[P_v+P_f+\frac{{1.5n}_k}{{728u}^2}*\frac{F^3(1-f_0/F)}{f_0^2}*\frac{{\left(\mathrm{Sn}\right)}^2}{g}{\mathrm{\&rho;}}_{f}g]$

From formula, can find out, under the constant situation of pump footpath and swabbing parameter, increase f ₀: the basal area of the valve seat orifice of promptly moving about, can effectively reduce flow of liquid and cross the resistance Pr of traveling valve, the suffered last thrust of sucker rod moves down the position of neutral point when just effectively reducing down stroke, reduce deflection well section, alleviate the eccentric wear that sucker rod causes because of deflection.

The anti-eccentric wear sand control gas-tight oil well pump of double flow channel is by the well liquid shunting action of down stroke at pump filler opening 11 places of interior pump barrel, when sucker rod produces deflection deformation, can be rapidly, effectively reduce in the pump barrel fluid column to the resistance of piston, alleviate the degree of sucker rod deflection deformation, reduce the sucker rod deflection deformation time, be equivalent to increase the basal area f of valve seat orifice of moving about ₀Thereby, very effectively reduced the resistance P that flow of liquid is crossed traveling valve _r, fundamentally reduced the degree of oil well eccentric wear, even can prevent the generation of eccentric wear.

Following table be to CYJ10 type machine and CYJ12 type machine under the constant situation of pump footpath and swabbing parameter, the Pr contrast situation (basal area of the valve seat orifice of moving about of Φ 44mm double flow channel eccentric wear prevention pumping pump is the twice of Φ 44mm routine oil well pump) of Φ 44mm double flow channel eccentric wear prevention pumping pump and the conventional oil well pump of Φ 44mm:

From last table result of calculation, adopt Φ 44mm double flow channel eccentric wear prevention pumping pump than adopting the conventional oil well pump Pr of Φ 44mm (N) to reduce by 81.3%, cross the resistance Pr of traveling valve and reduced last thrust when sucker rod is descending thereby reduced flow of liquid effectively, thereby alleviated the eccentric wear that deflection causes the bottom sucker rod.

2, the sand control principle of pump

When pump was up, because pumping action drives well liquid and impurity (sand) enters pump barrel, if common oil well pump, sand was difficult for discharging in pump barrel, and blocking channel influence the closure of valve ball and valve seat, causes the leakage of sand card or pump.Double flow channel sand control gas-tight eccentric wear prevention pumping pump is when pump is descending, owing to adopt long-plunger, so sand can't enter interior pump barrel, the part sand enters outer pump barrel, because action of gravity, enter the sand sediment pipe 10 of outer pump barrel bottom, thereby reduced the content of sand in the interior well liquid of pump barrel, play the purpose of sand control.Simultaneously long-plunger act on pump when quitting work, can guarantee since the sand that action of gravity is sunk do not enter in pump barrel 4, but enter bottom sand sediment pipe 10, thereby can guarantee that the interior traveling valve 7 of pump is not stuck by sand through outer pump barrel 5.

3, the gas-tight principle of pump

When containing free gas in the oil well, the working efficiency of deep-well pump is had a significant impact.Gas accounts for a part of volume in pump barrel after, reduced the full level of crude oil.Simultaneously, gas is compressible, causes standing valve and traveling valve to open or close sluggishness in the piston up-down stroke, the deep-well pump discharge capacity is obviously reduced, the oil well underproduction.When serious, the gas lock phenomenon can take place, make the piston up-down stroke only play the effect of compression, expanding gas, standing valve and traveling valve total failure, oil well stopping production.

Double flow channel sand control gas-tight eccentric wear prevention pumping pump is in the more oil well of gassiness, make the portion gas in the interior pump barrel enter the urceolus pump by down stroke from standing valve 12, thereby the velocity of discharge of the gas that increases has avoided the interior gas of conventional pump to compress the swelling phenomenon repeatedly, prevents the generation of gas lock.

4, efficient principle

Be twice owing to adopt the double flow channel fluid to increase by area, resistance reduces the suction fluid volume and increases, and produced liquid in oil well increases, so efficient improves.

Three, Applicable scope

Be used for high oil, the thick oil well of coagulating, sucker rod deflection deformation and the pumping well of eccentric wear;

Be used to the serious pumping well that shakes out;

The pumping well that is used for gases affect;

The pumping well that is used for above two or three factor affecting.

Four, second kind of anti-eccentric wear sand control gas-tight oil well pump working principle of double flow channel:

On the basis of double flow channel eccentric wear prevention pumping pump, increase standing valve 16, liquid and inner core in the connected well reach the purpose that increases oil inlet passage.

During upstroke, liquid enters pump barrel by pump oil inlet pipe 15 and standing valve 16 in the well, thereby has increased oil inlet quantity, has improved well yield.

Advantage of the present utility model is:

1, adopt double flow channel, promptly interior pump barrel and outer pump barrel two runner extraction well liquid, pump efficiency is a times of conventional pump;

2, can very effectively prevent the oil well eccentric wear that produces because of descending fluid column resistance;

3, has good sand controlling result;

4, has certain anti-gas impact effect.

5, reduce rate of fault, increase substantially the individual well crude output.

Description of drawings

Fig. 1 is first kind of example structure schematic representation of the present utility model.

Fig. 2 is second kind of example structure schematic representation of the present utility model.

Embodiment

Embodiment one

Anti-eccentric wear sand control gas-tight multifunctional oil-well pump comprises eccentric sub-coupling 1, tubing nipple 2, interior pump barrel 4, outer pump barrel 5, piston 6, standing valve 8, sand sediment pipe 10, standing valve 12.Interior pump barrel 4 is arranged on a side in the outer pump barrel 5, and the upper and lower end of interior pump barrel 4 is fixedlyed connected with outer pump barrel 5 by a plurality of clamping bolts 3 respectively.Be provided with oil inlet pipe 15 in the lower end of interior pump barrel 4, in the oil inlet pipe jack 9 that oil inlet pipe 15 inserts on outer pump barrel 5 walls, be provided with standing valve 8 at interior pump barrel 4 internal fixation, standing valve 8 is positioned at the top of oil inlet pipe 15, in interior pump barrel 4, be provided with piston 6, piston 6 lower ends are set with traveling valve 7, and traveling valve 7 is positioned at the top of standing valve 8.Outside in the pump barrel 5, interior pump barrel 4 outer walls and outside be set with standing valve 12 between pump barrel 5 inwalls, standing valve 12 lower ends are provided with filler opening 11, in the filler opening jack 18 in filler opening 11 inserts on pump barrel 4 walls.Be provided with sand control cap 14 in standing valve 12 upper ends.Sand sediment pipe 10 upper ends are connected with outer pump barrel 5 lower ends with screw thread.Interior pump barrel 4 upper ends are connected with last oil pipe 19 with screw thread, on last oil pipe 19 walls opening 20 are arranged.On the pump barrel 4, tubing nipple 2 lower ends were connected with outer pump barrel 5 upper ends with screw thread in tubing nipple 2 was sleeved on, and eccentric sub-coupling 1 is sleeved on the oil pipe 19, and the lower end of eccentric sub-coupling 1 is connected with tubing nipple 2 with screw thread.

Embodiment two

Embodiment two is structurally basic identical with embodiment one, difference is to fixedly install a standing valve 16 above standing valve 12 again, standing valve 16 has last filler opening 17 and following filler opening 22, last filler opening 17 is corresponding with filler opening 13 on interior pump barrel 4 walls, and following filler opening 22 is corresponding with following filler opening 21 on the outer pump barrel wall.

Said fixing valve 8, traveling valve 7, standing valve 12 and standing valve 16 are the known available product.

Claims (2)

1, anti-eccentric wear sand control gas-tight multifunctional oil-well pump, comprise eccentric sub-coupling (1), tubing nipple (2), sand sediment pipe (10), interior pump barrel (4), outer pump barrel (5), it is characterized in that: interior pump barrel (4) is arranged on a side in the outer pump barrel (5), on the interior pump barrel (4), fixedly connected with outer pump barrel (5) by a plurality of clamping bolts (3) respectively in the lower end, be provided with oil inlet pipe (15) in the lower end of interior pump barrel (4), in the oil inlet pipe jack (9) on oil inlet pipe (15) insertion outer pump barrel (5) wall, be provided with standing valve (8) at interior pump barrel (4) internal fixation, standing valve (8) is positioned at the top of oil inlet pipe (15), in interior pump barrel (4), be provided with piston (6), piston (6) lower end is set with traveling valve (7), traveling valve (7) is positioned at the top of standing valve (8), outside in the pump barrel (5), be positioned between pump barrel (4) outer wall and outer pump barrel (5) inwall and be set with standing valve (12), standing valve (12) lower end is provided with filler opening (11), in the filler opening jack (18) in filler opening (11) inserts on pump barrel (4) wall, be provided with sand control cap (14) in standing valve (12) upper end, sand sediment pipe (10) upper end is connected with outer pump barrel (5) lower end with screw thread, (4) upper end is connected with last oil pipe (19) with screw thread in the interior pump, on last oil pipe (19) wall opening (20) is arranged, tubing nipple (2) is sleeved on the interior pump barrel (4), tubing nipple (2) lower end is connected with outer pump barrel (5) upper end with screw thread, eccentric sub-coupling (1) is sleeved on the oil pipe (19), and the lower end of eccentric sub-coupling (1) is connected with tubing nipple (2) with screw thread.

2, anti-eccentric wear sand control gas-tight multifunctional oil-well pump according to claim 1, it is characterized in that a standing valve (16) being set in described standing valve (12) upper fixed, standing valve (16) has last filler opening (17) and following filler opening (22), last filler opening (17) is corresponding with filler opening (13) on interior pump barrel (4) wall, and following filler opening (22) is corresponding with filler opening (21) on the outer pump barrel wall.

Images