CN203081744U - Helical rotor pump reverse rotation controlled-release device for oilfield underground oil production - Google Patents
Helical rotor pump reverse rotation controlled-release device for oilfield underground oil production Download PDFInfo
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- CN203081744U CN203081744U CN 201320113131 CN201320113131U CN203081744U CN 203081744 U CN203081744 U CN 203081744U CN 201320113131 CN201320113131 CN 201320113131 CN 201320113131 U CN201320113131 U CN 201320113131U CN 203081744 U CN203081744 U CN 203081744U
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Abstract
The utility model relates to a helical rotor pump reverse rotation controlled-release device for oilfield underground oil production. The helical rotor pump reverse rotation controlled-release device for oilfield underground oil production comprises a valve body, wherein a valve sleeve is installed in an inner bore of the valve body; a hollow valve plug is arranged in the valve sleeve; the lower part of the valve plug penetrates through the inner bore of the valve sleeve; a spring gland is fixed at the upper end of the valve plug; a spring is installed on the outer part of the valve plug between the spring gland and the valve sleeve; a valve ball is embedded in the valve plug; a valve ball seat is arranged below the valve ball; a group of reflow holes are formed in a valve plug wall which is below and corresponds to the valve ball seat along a circumferential direction; a limiting step is upwards formed on the external wall of the valve plug above the reflow holes along the circumferential direction; and a well liquid reflow channel is formed between the limiting step and the valve sleeve when the valve plug operates to a lower dead center, so that the inner and outer cavities of the valve plug are communicated with each other. The device controls the reverse rotation speed within a reasonable scope through a helical rotor pump reverse flow control method and can quickly release the reverse energy so as to realize a stable stop purpose, and the operation of the device cannot be influenced due to slow reverse rotation release.
Description
Technical field
The utility model 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 utility model provides a kind of oil field down-hole oil production with helical rotor pump counter-rotating delayed release device valve, and 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 of counter-rotating discharges.
The technical solution of the utility model 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 torsion | 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 numbers |
| 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 return in backflow of the well liquid between oil pipe, the sleeve pipe and the manifold of ground.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 long-time counter-rotating 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 that oil reservoir refluxes.
Calculating learns, the well liquid in the oil pipe will be by pump to the casing space 1795060ml that refluxes, and calculates because total inverted population that liquid return caused are 3590 to change by the GLB500-14 pump.
Aforementioned calculation is the result of well liquid under the situation that oil reservoir refluxes in not considering manifold of ground backflow and oil well, 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 quickening 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 utlity model 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 to prevent that after drive unit is shut down the drive unit counter-rotating discharges 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 of counter-rotating discharges.
Description of drawings:
Accompanying drawing 1 is the utility model free state structural representation;
Accompanying drawing 2 is the utility model working state structure schematic representation.
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 utility model is described in further detail:
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 sealing spool 5 passages on the valve ball seat 10; 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, well liquid is when flowing on the lower direction of spool 5 cavitys, and at this moment the well liquid jack-up valve ball 3 that makes progress forms 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320113131 CN203081744U (en) | 2013-03-13 | 2013-03-13 | Helical rotor pump reverse rotation controlled-release device for oilfield underground oil production |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320113131 CN203081744U (en) | 2013-03-13 | 2013-03-13 | Helical rotor pump reverse rotation controlled-release device for oilfield underground oil production |
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| CN203081744U true CN203081744U (en) | 2013-07-24 |
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| CN 201320113131 Expired - Fee Related CN203081744U (en) | 2013-03-13 | 2013-03-13 | Helical rotor pump reverse rotation controlled-release device for oilfield underground oil production |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103256219A (en) * | 2013-03-13 | 2013-08-21 | 曹福林 | Helical rotor pump counter-rotating slow-release device for oilfield underground oil extraction |
| CN114607672A (en) * | 2022-03-18 | 2022-06-10 | 杭州青流液压设备制造有限公司 | Slow release valve for oil cylinder |
-
2013
- 2013-03-13 CN CN 201320113131 patent/CN203081744U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103256219A (en) * | 2013-03-13 | 2013-08-21 | 曹福林 | Helical rotor pump counter-rotating slow-release device for oilfield underground oil extraction |
| CN114607672A (en) * | 2022-03-18 | 2022-06-10 | 杭州青流液压设备制造有限公司 | Slow release valve for oil cylinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130724 Termination date: 20150313 |
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| EXPY | Termination of patent right or utility model |