CN201717699U - Metal corrugated tube oil storage cavity for submersible motor protector - Google Patents
Metal corrugated tube oil storage cavity for submersible motor protector Download PDFInfo
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- CN201717699U CN201717699U CN2010202045042U CN201020204504U CN201717699U CN 201717699 U CN201717699 U CN 201717699U CN 2010202045042 U CN2010202045042 U CN 2010202045042U CN 201020204504 U CN201020204504 U CN 201020204504U CN 201717699 U CN201717699 U CN 201717699U
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- metal bellows
- metal corrugated
- central siphon
- corrugated tube
- oil
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Abstract
The utility model discloses a metal corrugated tube oil storage cavity for a submersible motor protector, which comprises a large metal corrugated tube, a small metal corrugated tube and a shaft protecting tube. A stub is mounted at the bottom of the shaft protecting tube; an inclined through hole is arranged on the stub; an annular projecting edge is arranged in the middle of the stub fixedly connected to the lower end of the large metal corrugated tube by the aid of the projecting edge; a cover plate sleeved outside the shaft protecting tube is fixed to the upper end of the large metal corrugated tube and can slide relatively to the shaft protecting tube; the small metal corrugated tube is fixed onto the upper end surface of the cover plate; a positioning sleeved is fixedly connected to the upper end of the small metal corrugated tube and sleeved to the upper end of the shaft protecting tube; and an annular cavity among the large metal corrugated tube, the small metal corrugated tube and the shaft protecting tube is an oil storage cavity. The metal corrugated tube oil storage cavity effectively solves the problem of application of a submersible motor system in high temperature and corrosive oil wells, and can stably work under severe conditions over a long period of time.
Description
Technical field:
The utility model relates to the oil storage cavity of the motor protecter of the Electric Submersible Pump Unit of using in the oil recovery field, a kind of oil field, particularly a kind of submersible electric machine with oil protector metal bellows oil storage cavity.
Background technology:
Deep exploitation along with the oil field; the oil well quantity of hole condition relatively poor (high temperature, high pressure, corrosion) constantly increases; increase income in order to increase to adopt; a large amount of submersible electric pump that comes into operation in the exploitation, wherein motor protecter is mainly used in and isolates dynamo oil and well liquid to reach the purpose of protection submersible electric machine with oil in the submersible electric pump system.Can have enough dynamo oils to provide lubricated when motor is not only moved in oil well, and when unit turned cold, protector can be that motor replenishes not enough dynamo oil, and prevents that well liquid from entering motor.This just requires the shoe cream room of motor protecter well liquid and the dynamo oil that enters protector can be separated, and guarantees that well liquid does not enter motor from connected system.
At present the oil storage cavity of the submersible electric machine with oil protector that uses mainly is divided into two kinds of precipitating type and capsule-types.Precipitating type protector oil storage cavity is according to well liquid, two kinds of density of liquid differences of dynamo oil, utilizes the method for precipitation, and the well liquid of protector and dynamo oil separate with entering, and guarantees that well liquid can not enter motor from connected system.The major defect of precipitating type protector oil storage cavity is when the unit repeatedly starting and stopping, and the dynamo oil in the protector oil storage cavity is a well liquid with very fast replacing whole, and this moment, protector was just ineffective, and well liquid just can enter motor, finally causes burn-down of electric motor; In addition, because its operation principle is to utilize gravitational settling to separate, so can only be used for straight well or the little oil well of gradient.Capsule-type protector oil storage cavity is to adopt direct barrier wells liquid of capsule and dynamo oil, and utilizes the thermal expansion respiration of the elastic characteristic realization dynamo oil of rubber capsule, reduces the leakage of dynamo oil.With respect to the precipitating type protector, its advantage is that well liquid just can not enter motor, and can be applied to inclined shaft and horizontal well as long as capsule is not damaged, enlarges the range of application of submersible electric pump system.The shortcoming of capsule-type protector oil storage cavity is that its rubber capsule easily takes place when working in the oil well of high temperature, high pressure, corrosion aging, embrittlement and corrosion, and working life is short.
The utility model content:
In order to overcome the deficiency that exists in the background technology, the utility model provides a kind of submersible electric machine with oil protector metal bellows oil storage cavity, this submersible electric machine with oil protector metal bellows oil storage cavity directly barrier wells liquid and dynamo oil, the protection motor, the thermal expansion respiration of realization dynamo oil; And can be high temperature resistant, high pressure and corrosion, long-term stable operation under rugged environment.
The invention for solving the technical problem can reach by following technical solution: this submersible electric machine with oil protector comprises big metal bellows with metal bellows oil storage cavity, little metal bellows and protect central siphon, the described central siphon bottom of protecting is equipped with pipe nipple, have oblique through hole on the described pipe nipple, there is the convex annular edge at the pipe nipple middle part, pipe nipple is by the lower end of the fixedly connected big metal bellows in convex edge, the upper end of big metal bellows is fixed with and is enclosed within the cover plate that protects the central siphon outside with respect to protecting central siphon and can sliding, the cover plate upper surface is fixed with little metal bellows, the fixedly connected positioning sleeve in the upper end of little metal bellows, positioning sleeve is enclosed within and protects the central siphon upper end, big metal bellows, little metal bellows and the ring cavity that protects between the central siphon are shoe cream room; Described big metal bellows is enclosed within the big support ring that protects the central siphon outside with protecting to be equipped with at interval in the ring cavity of central siphon, is equipped with in little metal bellows and the ring cavity that protects central siphon and is enclosed within the little support ring that protects the central siphon outside.
The utility model is compared with the above-mentioned background technology can have following beneficial effect: this submersible electric machine with oil protector is used metal bellows oil storage cavity owing to adopt said structure, utilize the sealing of metal bellows can realize isolation to well liquid and dynamo oil preventing that well liquid from entering motor; Utilize the elasticity of metal bellows to realize moving axially of cover plate, thereby realize the thermal expansion respiration of dynamo oil; And metal bellows oil storage cavity is the 316L stainless steel; has characteristic corrosion-resistant, high temperature high voltage resistant; the long-term serviceability temperature boundary that has the capsule-type protector now can be increased to 250 ℃ by 180 ℃, expand the range of application of submersible electric pump system greatly.
Description of drawings:
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the structural representation of installing and using of the present utility model.
Among the figure: 1-positioning sleeve, the little metal bellows of 2-, the little support ring of 3-, the 4-cover plate, the big metal bellows of 5-, the big support ring of 6-, 7-protects central siphon, 8-pipe nipple, 9-convex edge, the oblique through hole of 10-, 11-shoe cream room, 12-top connection, the 13-metal bellows mechanical seal, 14-ball-and-seat, 15-housing, the 16-transition joint, the 17-axle.
Embodiment:
Below in conjunction with accompanying drawing will the utility model is described in further detail:
As shown in Figure 1, this submersible electric machine with oil protector comprises big metal bellows 5 with metal bellows oil storage cavity, little metal bellows 2 and protect central siphon 7, described central siphon 7 bottoms of protecting are equipped with pipe nipple 8, have oblique through hole 10 on the described pipe nipple 8, there is convex annular at pipe nipple 8 middle parts along 9, pipe nipple 8 is by the lower end of convex edge 9 fixedly connected big metal bellowss 5, the upper end of big metal bellows 5 is fixed with and is enclosed within the cover plate 4 that protects central siphon 7 outsides with respect to protecting central siphon 7 and can sliding, cover plate 4 upper surfaces are fixed with little metal bellows 2, the fixedly connected positioning sleeve 1 in the upper end of little metal bellows 2, positioning sleeve 1 is enclosed within and protects central siphon 7 upper ends, big metal bellows 5, little metal bellows 2 and the ring cavity that protects between the central siphon 7 are shoe cream room 11; Be equipped with at interval in described big metal bellows 5 and the ring cavity that protects central siphon 7 and be enclosed within the big support ring 6 that protects central siphon 7 outsides, be equipped with in little metal bellows 2 and the ring cavity that protects central siphon 7 and be enclosed within the ramuscule pushing out ring 3 that protects central siphon 7 outsides.Described big metal bellows 5 and little metal bellows 2 materials are the 316L stainless steel, adopt the not HB48 and the HB85 model metal bellows of LaCie ripple Tag metal bellows Co., Ltd.
As shown in Figure 2; this metal bellows oil storage cavity is installed between the transition joint 16 and top connection 12 of submersible electric machine with oil protector; be top connection 12 lower ends that positioning sleeve 1 is connected the submersible electric machine with oil protector; pipe nipple 8 convex annular are connected with transition joint 16 bolts of submersible electric machine with oil protector along 9 bottoms, and transition joint 16 and top connection 12 are got up by thread connection by the housing 15 in the outside.The endoporus of the inner surface of metal bellows shoe cream room 11 and transition joint 16 and top connection 12 constitutes the intracavity space of shoe cream room 11, and intracavity space communicates with the motor internal of bottom; The outer surface of metal bellows shoe cream room 11 and transition joint 16, top connection 12 and housing 15 constitute outer cavity space, and outer cavity space is logical by the through hole and the well liquid phase of top connection 12.
Its oiling oil circuit is as follows: dynamo oil is by the gap between transition joint 16 bearings and the axle 17, and enter metal bellows shoe cream room 11 by the oblique through hole 10 that protects on the central siphon pipe nipple 8, then successively by through hole on the big support ring 6, cover plate 4, ramuscule pushing out ring 3 and protect space between the central siphon 7, after waiting to be full of metal bellows shoe cream room 11, dynamo oil enters the single current valve opening of top connection 12 by the oilhole that protects central siphon 7 upper ends, and finally arrives ball-and-seat 14.
This submersible electric machine with oil protector with the operation principle of metal bellows oil storage cavity is: during operate as normal; metal bellows shoe cream room 11 inner chambers are full of dynamo oil; exocoel then is well liquid (bottom pressure is considered as constant), by the sealing function of metal bellows shoe cream room 11, ball-and-seat 14 and metal bellows mechanical seal 13 well liquid and dynamo oil is kept apart.This moment inside and outside cavity pressure balance, system is in stable state.
When the dynamo oil expanded by heating, dynamo oil enters metal bellows shoe cream room 11 intracavity spaces according to above-mentioned oiling oil circuit.Along with dynamo oil constantly expands, metal bellows shoe cream room inner chamber dynamo oil pressure raises, cover plate 4 upper and lower end face pressures are unbalanced, be cover plate 4 be subjected to upwarding pressure pressure greater than downward, the certain displacement so cover plate 4 moves up, i.e. the corresponding expansion of metal bellows shoe cream room 11 cavity volume is to hold the dynamo oil that submersible electric machine with oil expands, along with metal bellows shoe cream room inner chamber dynamo oil pressure constantly raises, cover plate 4 also will continue to move upward.After this pressure differential of Spring balanced that metal bellows shoe cream room self-deformation produces, cover plate 4 could be stablized.
When dynamo oil is caught a cold when shrinking, dynamo oil flow out metal bellows shoe cream room inner chamber downwards according to above-mentioned oiling oil circuit rightabout.Along with dynamo oil constantly shrinks, its chamber pressure reduces, cover plate 4 upper and lower end face pressures are unbalanced, be that cover plate 4 is subjected to downward pressure greater than upwarding pressure, so cover plate moves down certain displacement, promptly metal bellows shoe cream room cavity volume is corresponding dwindles, to replenish the required dynamo oil of submersible electric machine with oil, after this pressure differential of Spring balanced that metal bellows shoe cream room self-deformation produces, cover plate could be stablized, and reaches poised state.
Work so repeatedly, metal bellows oil storage cavity can barrier wells liquid and dynamo oil, realizes the thermal expansion respiration of dynamo oil, and can satisfy high temperature resistant, corrosion resistant instructions for use.
Claims (2)
1. a submersible electric machine with oil protector is with metal bellows oil storage cavity, comprise big metal bellows (5), little metal bellows (2) and protect central siphon (7), it is characterized in that: described central siphon (7) bottom of protecting is equipped with pipe nipple (8), have oblique through hole (10) on the described pipe nipple (8), there is convex annular at pipe nipple (8) middle part along (9), pipe nipple (8) is by the lower end of the fixedly connected big metal bellows in convex edge (9) (5), the upper end of big metal bellows (5) is fixed with to be enclosed within protects central siphon (7) outside with respect to protecting the cover plate (4) that central siphon (7) can slide, cover plate (4) upper surface is fixed with little metal bellows (2), the fixedly connected positioning sleeve in upper end (1) of little metal bellows (2), positioning sleeve (1) is enclosed within and protects central siphon (7) upper end, big metal bellows (5), little metal bellows (2) and the ring cavity that protects between the central siphon (7) are shoe cream room (11); Described big metal bellows (5) protects the outside big support ring (6) of central siphon (7) with protecting to be equipped with at interval in the ring cavity of central siphon (7) to be enclosed within, and is equipped with to be enclosed within little metal bellows (2) and the ring cavity that protects central siphon (7) and protects the outside little support ring (3) of central siphon (7).
2. submersible electric machine with oil protector according to claim 1 metal bellows oil storage cavity, it is characterized in that: described big metal bellows (5) and little metal bellows (2) are the 316L stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202045042U CN201717699U (en) | 2010-05-27 | 2010-05-27 | Metal corrugated tube oil storage cavity for submersible motor protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202045042U CN201717699U (en) | 2010-05-27 | 2010-05-27 | Metal corrugated tube oil storage cavity for submersible motor protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201717699U true CN201717699U (en) | 2011-01-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202045042U Expired - Lifetime CN201717699U (en) | 2010-05-27 | 2010-05-27 | Metal corrugated tube oil storage cavity for submersible motor protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201717699U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103557395A (en) * | 2013-10-30 | 2014-02-05 | 中国石油天然气集团公司 | Self-pressure relief type metal corrugated pipe expander capable of increasing respiratory capacity |
| CN104929917A (en) * | 2015-05-18 | 2015-09-23 | 薛国清 | Sealing system of submersible linear motor |
-
2010
- 2010-05-27 CN CN2010202045042U patent/CN201717699U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103557395A (en) * | 2013-10-30 | 2014-02-05 | 中国石油天然气集团公司 | Self-pressure relief type metal corrugated pipe expander capable of increasing respiratory capacity |
| CN103557395B (en) * | 2013-10-30 | 2016-03-02 | 中国石油天然气集团公司 | Can increase respiratory capacity from pressure-relief type metallic bellow expander |
| CN104929917A (en) * | 2015-05-18 | 2015-09-23 | 薛国清 | Sealing system of submersible linear motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110119 |
|
| CX01 | Expiry of patent term |