CN103256219A - Helical rotor pump counter-rotating slow-release device for oilfield underground oil extraction - Google Patents
Helical rotor pump counter-rotating slow-release device for oilfield underground oil extraction Download PDFInfo
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- CN103256219A CN103256219A CN2013100793437A CN201310079343A CN103256219A CN 103256219 A CN103256219 A CN 103256219A CN 2013100793437 A CN2013100793437 A CN 2013100793437A CN 201310079343 A CN201310079343 A CN 201310079343A CN 103256219 A CN103256219 A CN 103256219A
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- 238000000605 extraction Methods 0.000 title abstract 3
- 239000012530 fluid Substances 0.000 claims abstract description 17
- 210000004907 gland Anatomy 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims description 34
- 238000004519 manufacturing process Methods 0.000 claims description 15
- 230000003111 delayed effect Effects 0.000 claims description 13
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 38
- 238000010992 reflux Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 10
- 239000003129 oil well Substances 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 230000000750 progressive effect Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 206010016173 Fall Diseases 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
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Abstract
Disclosed is a helical rotor pump counter-rotating slow-release device for oilfield underground oil extraction. The helical rotor pump counter-rotating slow-release device for oilfield underground oil extraction comprises a valve body. A valve pocket is arranged in an inner hole of the valve body. A hollow valve core is disposed inside the valve pocket. The lower portion of the valve core passes through the inner hole of the valve pocket. The upper end of the valve core is fixed with a spring gland. A spring is arranged on the outside of the valve core between the spring gland and the valve pocket. A valve ball is disposed inside the valve core. A valve-ball seat is arranged blow the valve ball. A set of reflowing valves are arranged along the circumference of the corresponding valve core wall below the valve ball seat. A limit step is arranged along the circumference of the valve core outer wall above the reflowing valves. When the valve core runs to the bottom dead centre, a well fluid backflow channel is arranged between the limit step and the valve pocket such that inner and outer cavities of the valve core communicate with each other. According to the device, counter-rotating speed is controlled within a reasonable range by a method of controlling reverse flow of a screw pump. In addition, counter-rotating energy can be released rapidly, the purpose of stationary shutdown is achieved, and work will not be influenced by slow counter-rotating release.
Description
Technical field
The present invention relates to the used a kind of oil field down-hole oil production of oil recovery field, oil field screw pump with helical rotor pump counter-rotating delayed release device valve.
Background technique
In the oil recovery process of oil field, mechanical oil recovery is still the main method of current oil recovery, and screw pump is a kind of new mechanical oil production equipment, is fit to exploitation high viscosity, gassiness, contains husky crude oil; Screw pump mainly drives rotor by drive unit by sucker rod and rotates in stator, and down-hole crude oil is pumped to the purpose that ground reaches oil pumping.When shutting down sucker rod under the effect of oil jacket fluid column difference and itself resiliently deformable can counter-rotating take place and also rotating speed higher; the fragile oil production equipment that links to each other with sucker rod; the method of slowly-releasing sucker rod speed reversal has at present: on the one hand existing screw pump brake setting is on motor termination or output shaft; when breaking down on motor termination or the output shaft and between the polished rod; cause brake failure; discharge still very dangerous; even cause the screw pump damage even jeopardize personal safety, bring hidden danger.
Summary of the invention
In order to overcome the deficiency that exists in the background technique, the invention provides a kind of oil field down-hole oil production with helical rotor pump counter-rotating delayed release device valve, this device is installed in the suction side of subsurface progressive cavity.This oil field down-hole oil production can reach constant safety counter-rotating rotating speed with helical rotor pump counter-rotating delayed release device valve, and can discharge inversion energy faster, reaches the purpose of steady shutdown, does not influence operation slowly because counter-rotating discharges.
Technological scheme of the present invention is: this oil field down-hole oil production is with the helical rotor pump delayed release device that reverses, comprise valve body, described valve body inner bore is equipped with valve pocket, valve pocket is built-in with hollow spool, the endoporus of valve pocket is passed in the spool bottom, spool upper end fixing spring gland, the spool outside between spring capping and the valve pocket is equipped with spring, spool is built-in with valve ball, valve ball below is provided with the valve ball seat, and corresponding spool wall upper edge, valve ball seat below circumferentially has one group of return port, the return port top spool outer wall upper edge week upwards be provided with limited step, be provided with well liquid return flow line when spool moves to lower dead centre between limited step and the valve pocket, the interior exocoel of spool is communicated.Above-mentioned return port is oblique hole, and the positive stop lug boss lower end surface is provided with breach, and breach communicates with return port, and wear-resistant sleeve upper end-hole inward flange is provided with chamfering, and breach, return port and chamfering formed the fluid passage when spool moved to lower dead centre.
The energy source of screw rod counter-rotating mainly contains following two aspects:
1, the resiliently deformable of rod string: ground driving screw pump is by sucker rod the driving torque of surface drive to be passed to underwell pump.Resiliently deformable takes place in sucker rod under the effect of driving torque, the driving moment of surface drive disappears when screw pump is shut down, and the elastic deformation energy that is stored in the sucker rod will drive the surface drive counter-rotating;
The reverse calculating of all numbers:
The following pump degree of depth is generally 900m, calculates the counter-rotating week number of sucker rod by the torque limit of various sucker rods.
General screw pump sucker rod specification and torsional property table 1
| Sequence number | Specification | External diameter | Internal diameter | The surrender moment of | Torque limit | |
| 1 | CYG22D | 22.2 | ? | >733 | 938-1141 | |
| 2 | CYG22HL | 22.2 | ? | 938-1019 | 1142-1343 | |
| 3 | CYG25D | 25.4 | ? | >1097 | 1403-1707 | |
| 4 | CYG25HL | 25.4 | ? | 1403-1525 | 1709-1977 | |
| 5 | CYG28HL | 28.6 | ? | 2003-2178 | 2440-2870 | |
| 6 | CYG36D | 36 | 23 | >2397 | 3067-3731 | |
| 7 | CYG38D | 38 | 24 | >2869 | 3670-4465 | |
| 8 | CYG42D | 42 | 25 | >3669 | 4693-5717 |
The deformation angle of sucker rod is calculated by following formula:
In the formula:
The moment of torsion that M-sucker rod bears, Nm;
L-sucker rod length, m;
The shear modulus of G-sucker rod is got 80GPa;
The polar moment of inertia of sucker rod,
, D-sucker rod diameter, m.
Moment of torsion is got the maximum value of sucker rod torque limit during calculating, and sucker rod length is pressed 900m, and result of calculation sees the following form:
Table 2
| Sequence number | The bar external diameter | The bar internal diameter | The following pump degree of depth | Torque limit | Polar moment of inertia | Deformation angle | Be out of shape all |
| 1 | 0.0222 | 0 | 900 | 1343 | 2.383E-08 | 633.9 | 100.94 |
| 2 | 0.0254 | 0 | 900 | 1977 | 4.084E-08 | 544.5 | 86.71 |
| 3 | 0.0286 | 0 | 900 | 2870 | 6.565E-08 | 491.8 | 78.31 |
| 4 | 0.036 | 0.023 | 900 | 3731 | 1.374E-07 | 305.5 | 48.66 |
| 5 | 0.038 | 0.024 | 900 | 4465 | 1.72E-07 | 291.9 | 46.49 |
| 6 | 0.042 | 0.028 | 900 | 5717 | 2.45E-07 | 262.4 | 41.79 |
By above result of calculation as can be seen, all numbers of the caused counter-rotating of the distortion of sucker rod are less, and counter-rotating maximum 101 is changeed under the situation of moment of torsion that reaches capacity.
2, the liquid in the backflow of the well liquid between oil pipe, the sleeve pipe and the manifold of ground refluxes.Liquid-column height when screw pump is shut down in the oil pipe arrives ground, and the liquid level in the sleeve pipe is that example is about 700m apart from ground with the Daqing oil field, and at this moment the liquid in the oil pipe will be back to sleeve pipe by screw pump, finally reaches the level balance in oil pipe, the sleeve pipe.The backflow of these liquid will change screw pump into oil hydraulic motor, drive sucker rod and drive the surface drive counter-rotating.The particularly backflow of manifold of ground liquid will make screw pump remain on counter-rotating for a long time under the high pressure conditions.
Be the reverse calculating of all numbers of example with GLB500-14 type screw pump below.
Hole condition: sleeve pipe 5-1/2 ", internal diameter 139.7mm; Oil pipe 3-1/2 ", external diameter 88.9mm, internal diameter 73mm; Sucker rod Ф 28HY; Following pump degree of depth 900m; Submergence 300m.
Well liquid in not considering manifold of ground backflow and oil well reaches oil pipe liquid level and sleeve pipe level balance in the final oil well not under the situation of oil reservoir backflow.
Calculating learns, the well liquid in the oil pipe will be by pump to the casing space 1795060ml that refluxes, and calculating because liquid refluxes total inverted population of causing by the GLB500-14 pump is 3590 to change.
Above-mentioned calculating be consider not that manifold of ground refluxes and oil well in well liquid situation about refluxing to oil reservoir under the result, if these problems of generation, then total inverted population will be far longer than top result of calculation.
From above calculating as can be seen, the main energy source of screw pump counter-rotating is the backflow of well liquid.When counter-rotating took place, the pressure of well liquid acted on the screw pump constantly, and the drive screw pump rotor continues counter-rotating, and the torque reaction of generation consumes a part when overcoming counter-rotating frictional force, and all the other then all are used for accelerating to system inversion.We can say that it is to cause screw pump counter-rotating immediate cause out of control that well liquid refluxes.
The beneficial effect that the present invention has is: this oil field down-hole oil production is installed on the spacing short circuit below of screw pump suction side under the oil well with helical rotor pump counter-rotating delayed release device; be used for preventing that after drive unit was shut down, the drive unit counter-rotating discharged too fast and security incident takes place.After screw pump is shut down; the single current valve ball falls back on the valve seat at gravity with under the effect that oppositely liquid flows; the runner of sealing one-way valve; fluid pressure acts on the spool; when pressure during greater than the opposite force of spring spool move down; reduce the flow channel for liquids area that forms between valve seat and the spool; control the reverse flow of screw pump by the mode of control Flow area; thereby the reverse speed of control screw pump; when the pressure on acting on spool reduces; spool moves up under the effect of spring force; increase the Flow area between spool and the valve seat gradually, make that the fluid flow by runner tends towards stability under the different pressures, thereby reach constant safety counter-rotating rotating speed; also be beneficial to and discharge inversion energy faster, do not influence operation slowly because counter-rotating discharges.
Description of drawings:
Accompanying drawing 1 is free state structural representation of the present invention;
Accompanying drawing 2 is working state structure schematic representation of the present invention.
1-nut among the figure, the 2-spring capping, the 3-valve ball, the 4-spring, the 5-spool, the 6-valve pocket, the 7-valve body, the 8-circlip, 9-fluid runner, 10-valve ball seat, the 11-limited step, the 12-breach, the 13-return port, the 14-chamfering, 15-sucks runner.
Embodiment:
Below in conjunction with accompanying drawing will the invention will be further described:
Valve state shown in Figure 1 is the screw pump normal working, the oil field down-hole oil production is installed on the suction side of subsurface progressive cavity with helical rotor pump counter-rotating delayed release device, this device comprises valve body 7, valve body 7 endoporus are equipped with valve pocket 6, valve pocket 6 is built-in with hollow spool 5, the endoporus of valve pocket 6 is passed in spool 5 bottoms, the flexible shelves ring 8 of spool 5 lower end outer wall cards, 8 pairs of spools 5 of elasticity shelves ring have position-limiting action, when the screw pump proper functioning, spool 5 is up under suction, and elasticity shelves ring 8 prevents that spool 5 from deviating from valve body 7.Spool 5 upper end fixing spring glands 2, spool 5 outer walls between spring capping 2 and the valve pocket 6 are with spring 4.Be connected with nut 1 on the spool 5 of spring capping 2 tops.Spool 5 is built-in with valve ball 3, valve ball 3 belows are provided with valve ball seat 10, the spool 5 wall upper edges of valve ball seat 10 tops circumferentially have one group of fluid runner 9, the spool 5 wall upper edges of valve ball seat 10 correspondences circumferentially have one group of return port 13, valve ball 3 floats when the screw pump proper functioning, well liquid sucks runner 15 inflows by the lower end mouth of valve body 6, is flow in the pump by spool 5 inner chambers, fluid runner 9 and return port 13.The 5 outer wall upper edge weeks of spool of return port 13 tops upwards are provided with positive stop lug boss 11; effect lower valve ball 3 fallings at gravity and reverse liquid stream when screw pump is shut down are sitting in valve ball seat 10 sealing spools 5 passages; fluid pressure acts on spool 5 upper valve cores 5 and moves down; spool 5 stopped to fall after rise when while positive stop lug boss 11 fell after rise to the position of valve pocket 6; spring 4 is compressed; this moment, spool 5 moved to lower dead centre; be provided with the fluid passage between positive stop lug boss 11 and the valve pocket 6; spool 5 interior exocoels are communicated, and partially liq from then on fluid passage flow into spool 5 inner chambers by valve body 7 inner chambers.The pressure reduction of well liquid diminishes gradually between oil pipe and the sleeve pipe.The sand that be deposited on valve body 7 endoporus upper-end surfaces this moment also can play the effect of sand control along with reverse liquid stream flows away.
The oil field down-hole oil production with the effect of helical rotor pump counter-rotating delayed release device valve is: as shown in Figure 1, valve ball 3 is combined to form an one-way valve with spool 5, when well liquid was upwards flowed by the below of spool 5 cavitys, at this moment the well liquid jack-up valve ball 3 that makes progress formed flow channels from the bottom to top.After screw pump was shut down, well liquid began from top to bottom to reflux, and valve ball 3 falls back on the sealing seat of spool 5 intermediate portions under the effect of gravity and well liquid return pressure, the one-way valve sealing.At this moment well liquid can only reflux downwards by the return port of side, spool 5 middle part.The well action of hydraulic force is on spool, when pressure during greater than spring force spool move down, at this moment return port is combined by spool 5 and valve body 7, the part area of passage of return port is blocked by valve pocket 6, the area of passage in finite reflux hole reduces, and realizes the throttling to well liquid, reduces the passing capacity of well liquid, restriction well liquid capacity of reflux, thereby control screw pump counter-rotating rotating speed.When the well hydraulic coupling reduces gradually, spring force overcomes the well hydraulic coupling, and spool 5 moves on gradually, increase the area of passage of return port, increase capacity of reflux, so that the counter-rotating rotating speed of screw pump, reaches the effect that discharges the screw pump counter-rotating safely, fast a safe and rational scope.
Fig. 2 is that valve is in running order, the backpressure of liquid makes one-way valve be in closed condition, spool also overcomes spring force and moves to lower dead centre under the fluid pressure effect, the fluid passage that spool and valve seat form is in minimum state, the reverse flow of confined liquid, along with the decline of pressure, spring promotes spool gradually and moves up, fluid passage area increases gradually, so that the reverse speed of screw pump remains within the scope of setting.
Claims (5)
1. an oil field down-hole oil production is with the helical rotor pump delayed release device that reverses, comprise valve body (7), it is characterized in that: described valve body (7) endoporus is equipped with valve pocket (6), valve pocket (6) is built-in with hollow spool (5), the endoporus of valve pocket (6) is passed in spool (5) bottom, spool (5) upper end fixing spring gland (2), spool (5) outside between spring capping (2) and the valve pocket (6) is equipped with spring (4), spool (5) is built-in with valve ball (3), valve ball (3) below is provided with valve ball seat (10), corresponding spool (5) wall upper edge, valve ball seat (10) below circumferentially has one group of return port (13), return port (13) top spool (5) outer wall upper edge week upwards be provided with limited step (11), spool (5) is provided with well liquid return flow line between limited step (11) and the valve pocket (6) when moving to lower dead centre, and the interior exocoel of spool (5) is communicated.
2. oil field according to claim 1 down-hole oil production is with the helical rotor pump delayed release device that reverses, and it is characterized in that: valve pocket (6) upper-end surface is a little more than the upper-end surface of valve body (7) endoporus.
3. oil field according to claim 1 down-hole oil production is with the helical rotor pump delayed release device that reverses, it is characterized in that: return port (13) is oblique hole, limited step (11) lower end surface is provided with breach (12), breach (12) communicates with return port (13), valve pocket (6) upper end-hole inward flange is provided with chamfering (14), and spool (5) is breach (12), return port (13) and chamfering (14) formation fluid passage when moving to lower dead centre.
4. oil field according to claim 1 down-hole oil production is characterized in that: the flexible shelves rings of spool (5) lower end outer wall card (8) with the helical rotor pump delayed release device that reverses.
5. oil field according to claim 1 down-hole oil production is with the helical rotor pump delayed release device that reverses, it is characterized in that: spool (5) the wall upper edge of valve ball seat (10) top circumferentially has one group of fluid runner (9), is connected with nut (1) on the spool (5) of spring capping (2) top.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310079343.7A CN103256219B (en) | 2013-03-13 | 2013-03-13 | A kind of oil field well oil recovery helical rotor pump reverses delayed release device |
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| CN201310079343.7A CN103256219B (en) | 2013-03-13 | 2013-03-13 | A kind of oil field well oil recovery helical rotor pump reverses delayed release device |
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| CN103256219A true CN103256219A (en) | 2013-08-21 |
| CN103256219B CN103256219B (en) | 2015-09-16 |
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| CN201310079343.7A Expired - Fee Related CN103256219B (en) | 2013-03-13 | 2013-03-13 | A kind of oil field well oil recovery helical rotor pump reverses delayed release device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106224236A (en) * | 2016-09-27 | 2016-12-14 | 中国石油天然气股份有限公司 | Product control inversion set is carried under screw bolt well |
| CN107100586A (en) * | 2017-04-13 | 2017-08-29 | 潍坊盛德石油机械制造有限公司 | The underlying flow-stop valve of screw pump |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19529807A1 (en) * | 1995-08-14 | 1997-02-20 | Luk Fahrzeug Hydraulik | Double hub flywheel pump |
| CN1191958A (en) * | 1997-01-06 | 1998-09-02 | 运载器有限公司 | Combination valve for screw compressors |
| CN2742189Y (en) * | 2004-09-30 | 2005-11-23 | 大庆油田有限责任公司 | Reverse rotation speed limit bracker for hydraulic oil pumping screw pump |
| CN2752485Y (en) * | 2004-08-25 | 2006-01-18 | 大庆油田有限责任公司 | Underground antiturning-back device for screw pump |
| CN203081744U (en) * | 2013-03-13 | 2013-07-24 | 曹福林 | Helical rotor pump reverse rotation controlled-release device for oilfield underground oil production |
-
2013
- 2013-03-13 CN CN201310079343.7A patent/CN103256219B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19529807A1 (en) * | 1995-08-14 | 1997-02-20 | Luk Fahrzeug Hydraulik | Double hub flywheel pump |
| CN1191958A (en) * | 1997-01-06 | 1998-09-02 | 运载器有限公司 | Combination valve for screw compressors |
| CN2752485Y (en) * | 2004-08-25 | 2006-01-18 | 大庆油田有限责任公司 | Underground antiturning-back device for screw pump |
| CN2742189Y (en) * | 2004-09-30 | 2005-11-23 | 大庆油田有限责任公司 | Reverse rotation speed limit bracker for hydraulic oil pumping screw pump |
| CN203081744U (en) * | 2013-03-13 | 2013-07-24 | 曹福林 | Helical rotor pump reverse rotation controlled-release device for oilfield underground oil production |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106224236A (en) * | 2016-09-27 | 2016-12-14 | 中国石油天然气股份有限公司 | Product control inversion set is carried under screw bolt well |
| CN107100586A (en) * | 2017-04-13 | 2017-08-29 | 潍坊盛德石油机械制造有限公司 | The underlying flow-stop valve of screw pump |
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| CN103256219B (en) | 2015-09-16 |
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Effective date of registration: 20170524 Address after: Honggang District Park Industrial Park of small and medium-sized enterprises of iron Tuqiang incubator 163000 Heilongjiang city of Daqing province (Hing Road No. 80, No. 5 joint factory) Patentee after: Daqing Gigabyte Machinery Manufacturing Co., Ltd. Address before: East Lake street, Ranghulu District 163000 in Heilongjiang province Daqing city East Lake District No. 711 Co-patentee before: Yin Fengxia Patentee before: Cao Fulin |
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Granted publication date: 20150916 Termination date: 20180313 |