CN201963592U - Double-disc straight blade impeller for subsea mud lift pump - Google Patents
Double-disc straight blade impeller for subsea mud lift pump Download PDFInfo
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- CN201963592U CN201963592U CN2010206735329U CN201020673532U CN201963592U CN 201963592 U CN201963592 U CN 201963592U CN 2010206735329 U CN2010206735329 U CN 2010206735329U CN 201020673532 U CN201020673532 U CN 201020673532U CN 201963592 U CN201963592 U CN 201963592U
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- driving wheel
- pump
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- follower
- blade impeller
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Abstract
The utility model relates to a double-disc straight blade impeller for a subsea mud lift pump, which is characterized by comprising a circular ring-shaped driving wheel. Both side faces of the driving wheel are symmetrically provided with a plurality of same radial straight blades in manner of a divergent shape; the center of a circular ring of the driving wheel is provided with a hub; the hub is evenly provided with four long blades at intervals; each long blade is respectively set into a whole with the corresponding radial straight blades on both side faces of the driving wheel; the four long blades at one side of the driving wheel are respectively provided with a connecting arm; the driving wheel is connected with a circular ring-shaped driven wheel through the four connecting arms; and both side faces of the driven wheel are symmetrically provided with a plurality of same radial straight blades in manner of the divergent shape. The double-disc straight blade impeller for the subsea mud lift pump has strong multiphase delivery capacity, jamming resistance, abrasion resistance, a flat flow head curve, a wide working range, a low axial force and no sealing pressure, therefore, the double-disc straight blade impeller can be widely used for the subsea mud lift pump in the marine riser-free drilling process.
Description
Technical field
The utility model relates to a kind of fluid conveying machine that is used to carry drilling mud and other marine mineral particles, particularly about a kind of double plate prismatic blade impeller that is used for not having the seabed mud lifting pump of marine riser drilling process.
Background technique
No marine riser mud veclamation drilling technology is an implementation of double-gradient well drilling technology, different with other double-gradient well drilling system schemas, in no marine riser drilling technology, use two gradient mud, realize double-gradient well drilling near the seawater fluid pressure by seabed mud lifting pump control subsea wellheads pressure.Drilling fluid is pumped in the drilling rod by the sea in this system, arrive the shaft bottom through drilling rod, impact grinding rock and cutting carring are by returning on the bore hole annulus, enter mud lifting pump in seabed at the annular space top through the rotation part flow arrangement, landwaste and drilling fluid return drill platform by the mud reflux pipeline under seabed mud lifting pumping action.
In the no marine riser mud veclamation drilling technology, the mode of operation of seabed mud lifting pump and the characteristic of institute's fed sheet of a media have proposed special requirement to it: be to realize by the flow of regulating seabed mud lifting pump because well head pressure equals the control of sea water static pressure power 1), and the inlet pressure of seabed mud lifting pump just equals subsea wellheads pressure, the required seabed of so certain depth of water lift of pump almost is constant, so seabed mud lifting pump will have smooth flow-lift performance curve, promptly lift is little with changes in flow rate; 2) because the medium of carrying is to contain tempering property of height particle, or even the drilling fluid of gas, thus seabed mud lifting pump to have anti-ly stop up, the ability of wear-resistant and heterogeneous conveying; 3) has the inclusion seal performance of the solid-liquid two-phase flow pump that does not add outer Rinsing unit under deep water, the high-lift condition; 4) has the axial force balance ability of high-head pump.Therefore, satisfy the key technology that mud lifting Performance And Reliability high seabed mud lifting pump in seabed just becomes no marine riser mud veclamation drilling technology.
Existing pump that can the conveying solid substance particle mainly contains two classes: positive displacement pump and common vane type oil pump.Positive displacement pump, as oil isolation pump, plunger pump, diaphragm pump etc., be typically equipped with valve, can not allow the solid particle of greater particle size pass through, according to the working condition requirement of no marine riser drilling well seabed mud lifting pump, positive displacement pump also is not suitable for the lifting of ocean floor drilling mud.
Axial-flow pump and mixed flow pump flow are too big and lift is too little in the vane type oil pump, and Vortex pump and partial emission pump then are applicable to the situation of low-flow high-lift.Have only and adopt centrifugal pump more suitable.At present for high-lift, adopt the multistage centrifugal pump of half-opened impeller structure to have three deficiencys, the one, flow passage components are relatively more responsive to landwaste, it is relatively poor by performance and wear resistance, uses more slag stock pump at present and is used for the small size (particle diameter≤3mm) conveying of solid particle basically; The 2nd, the centrifugal pump lift height of multi-stage impeller structure, axial force is big, needs axial thrust balancing devices, makes the pump structure complexity; The 3rd, multi-stage impeller structure final stage axial seal pressure is big, adopts the mode of mechanical seal, needs to consider the washing problems of sealing surface, and deep-sea subsea use structural type is complicated, so operating cost is higher and reliability is undesirable.
Summary of the invention
At the problems referred to above, the purpose of this utility model provides that a kind of flow lift curve is smooth, good by performance, the double plate prismatic blade impeller that is used for seabed mud lifting pump of little, the no disc friction losses of wearing and tearing.
For achieving the above object, the utility model is taked following technological scheme: a kind of double plate prismatic blade impeller that is used for seabed mud lifting pump, it is characterized in that: it comprises the driving wheel of a ring, the bi-side of described driving wheel are divergent shape and are symmetrically arranged with some identical straight radial blades, the circle ring center of described driving wheel is provided with wheel hub, evenly be arranged at intervals with four linear leafs on the described wheel hub, each described linear leaf respectively with described driving wheel bi-side on corresponding described straight radial blade be set to one; Be respectively arranged with a link arm on four linear leafs of described driving wheel one side, described driving wheel connects a ring follower by four described link arms; Be divergent shape on the described follower bi-side and be symmetrically arranged with some identical straight radial blades.
Described follower is identical with the external diameter and the internal diameter of described driving wheel, and the position of the straight radial blade on the position of the straight radial blade on the described follower bi-side and the described driving wheel bi-side is corresponding.
The utility model is owing to take above technological scheme, it has the following advantages: 1, the utility model is owing to exist no leaf district between follower and the driving wheel, most of mud solids particle is directly discharged from no leaf district, and without vane region, therefore, can make between driving wheel and the follower not blockage phenomenon, and less to the wearing and tearing of the straight radial blade on driving wheel and the follower.2, the utility model is because the blade that is provided with in the bi-side of driving wheel and follower is a straight radial blade, and has no leaf district between driving wheel and the follower, therefore, can be so that the flow lift curve of seabed mud lifting pump be smooth, operating range is wide.3, the utility model is owing to form four big perforates between driving wheel wheel hub and four linear leafs, and driving wheel is provided with identical straight radial blade near the side of rear pump cover and front pump cover respectively with follower, therefore, can be so that chamber, the front and back flox condition of seabed mud lifting pump to be similar, axial force obtains maximum balance.4, the utility model is because on driving wheel and follower, side near rear pump cover and front pump cover is provided with straight radial blade respectively, therefore, can make the utility model not have the wheel disc loss of driving wheel and follower, the efficient of seabed mud lifting pump is improved relatively.5, the utility model is owing to form four big perforates near the driving wheel wheel hub, the fluid at main shaft seal place is communicated with the pump intake of seabed mud lifting pump, the hydrodynamic pressure at main shaft seal place equals the pressure at pump intake place, and in no marine riser mud veclamation drilling technology, control near seawater fluid pressure realization double-gradient well drilling by inlet pressure seabed mud lifting pump, so the main shaft seal place pressure of pump approaches sea water static pressure power, promptly the Seal cage external and internal pressure of pump approaches zero and does not change with sea water advanced.The heterogeneous conveying capacity of the utility model is strong, anti-obstruction, wear-resistant, and the flow lift curve is smooth, and operating range is wide, and axial force is little, and therefore no sealing load, can be widely used in the seabed mud lifting pump in the no marine riser drilling process.
Description of drawings
Fig. 1 is the utility model structural representation
Fig. 2 is the utility model and seabed mud lifting pump pump housing assembling condition schematic representation
Embodiment
Below in conjunction with drawings and Examples the utility model is described in detail.
As shown in Figure 1, the utility model comprises the driving wheel 1 of a ring, the bi-side of driving wheel 1 are divergent shape and are symmetrically arranged with some identical straight radial blades 2, the circle ring center of driving wheel 1 is provided with wheel hub 3, evenly be arranged at intervals with four linear leafs 4 on the wheel hub 3, each linear leaf 4 respectively with driving wheel 1 bi-side on corresponding straight radial blade 2 be set to one.The circle ring center of driving wheel 1 is divided into four big perforates 5 by wheel hub 3 and four linear leafs 4.Be respectively arranged with a link arm 6 on four linear leafs of driving wheel 1 one sides, driving wheel 1 connects a ring follower 7 by four link arms 6.Circular hole in the middle of the follower 7 is an impeller eye 8.All external diameter and the internal diameter with driving wheel 1 is identical with internal diameter for the external diameter of follower 7, and the corresponding position, position of the straight radial blade 2 on follower 7 both sides and the driving wheel 1 also is provided with straight radial blade 2.Formed no leaf district between the straight radial blade 2 between driving wheel 1 and the follower 4.
In the foregoing description, keep certain spacing by link arm 6 between driving wheel 1 and the follower 7, the concrete size of spacing, promptly the length of link arm 6 is generally determined according to the largest particles diameter that allows to pass through.
As shown in Figure 2, the utility model is installed between the front pump cover 9 and rear pump cover 10 of seabed mud lifting pump, and is closed by front pump cover 9 and rear pump cover 10.Follower 7 of the present utility model is near front pump cover 9, and driving wheel 1 is near rear pump cover 10.In the wheel hub 3 at driving wheel of the present utility model 1 center a main shaft 11 is set, the utility model and rear pump cover 10 can be tightly connected by main shaft 11.Front pump cover 9 middle parts are provided with pump intake, when seabed mud lifting pump proper functioning, mud flows to the utility model from pump intake, mud at first flows between followers 7 and the driving wheel 1 through the impeller eye on the follower 78, flows to vane region between rear pump cover and the driving wheel 1 by four perforates 5 on follower 7 and driving wheel 1 interlobate no leaf district and the driving wheel 1.
The various embodiments described above only are used to illustrate the utility model; wherein the structure of each parts, Placement etc. all can change to some extent; every equivalents of carrying out on the basis of technical solutions of the utility model and improvement all should not got rid of outside protection domain of the present utility model.
Claims (2)
1. double plate prismatic blade impeller that is used for seabed mud lifting pump, it is characterized in that: it comprises the driving wheel of a ring, the bi-side of described driving wheel are divergent shape and are symmetrically arranged with some identical straight radial blades, the circle ring center of described driving wheel is provided with wheel hub, evenly be arranged at intervals with four linear leafs on the described wheel hub, each described linear leaf respectively with described driving wheel bi-side on corresponding described straight radial blade be set to one; Be respectively arranged with a link arm on four linear leafs of described driving wheel one side, described driving wheel connects a ring follower by four described link arms; Be divergent shape on the described follower bi-side and be symmetrically arranged with some identical straight radial blades.
2. a kind of double plate prismatic blade impeller that is used for seabed mud lifting pump as claimed in claim 1, it is characterized in that: described follower is identical with the external diameter and the internal diameter of described driving wheel, and the position of the straight radial blade on the position of the straight radial blade on the described follower bi-side and the described driving wheel bi-side is corresponding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206735329U CN201963592U (en) | 2010-12-22 | 2010-12-22 | Double-disc straight blade impeller for subsea mud lift pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206735329U CN201963592U (en) | 2010-12-22 | 2010-12-22 | Double-disc straight blade impeller for subsea mud lift pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201963592U true CN201963592U (en) | 2011-09-07 |
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ID=44526127
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206735329U Expired - Lifetime CN201963592U (en) | 2010-12-22 | 2010-12-22 | Double-disc straight blade impeller for subsea mud lift pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201963592U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102042263A (en) * | 2010-12-22 | 2011-05-04 | 中国海洋石油总公司 | Double-disc straight blade impeller for subsea mud lift pump |
-
2010
- 2010-12-22 CN CN2010206735329U patent/CN201963592U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102042263A (en) * | 2010-12-22 | 2011-05-04 | 中国海洋石油总公司 | Double-disc straight blade impeller for subsea mud lift pump |
| CN102042263B (en) * | 2010-12-22 | 2012-08-29 | 中国海洋石油总公司 | Double-disc straight blade impeller for subsea mud lift pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110907 Effective date of abandoning: 20120829 |