CN201526452U - Underground annulus suction screw pump - Google Patents
Underground annulus suction screw pump Download PDFInfo
- Publication number
- CN201526452U CN201526452U CN2009201646114U CN200920164611U CN201526452U CN 201526452 U CN201526452 U CN 201526452U CN 2009201646114 U CN2009201646114 U CN 2009201646114U CN 200920164611 U CN200920164611 U CN 200920164611U CN 201526452 U CN201526452 U CN 201526452U
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- rotor
- stator
- frustum
- screw pump
- spirality
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- Expired - Lifetime
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Abstract
The utility model relates to a pump for sucking drilling fluid in shaft annuluses in petroleum drilling operations, in particular to an underground annulus suction screw pump, which comprises an upper joint, a stator, a lower joint and a rotor. At least three spiral convex teeth are uniformly distributed on the outer side of the stator, spiral grooves are uniformly distributed on the inner wall of the rotor, the section shape of each spiral groove corresponds to that of each spiral convex tooth, the amount of the spiral grooves is one more than that of the spiral convex teeth, and spiral pump teeth are arranged on the outer side of the rotor. The underground annulus suction screw pump is reasonable and compact in structure and convenient for use. The spiral grooves in the rotor are pushed by circulating drilling fluid to drive the rotor to rotate around the stator, and then the rotor drives the spiral pump teeth on the outer side thereof to discharge shaft annulus drilling fluid, thereby reducing pressure of shaft annulus fluid columns during drilling operations, achieving the purposes of underbalanced drilling and increasing drilling speed, being capable of reducing usage of drilling fluid chemical agents, and greatly increasing drilling efficiency and reducing cost. In addition, the underground annulus suction screw pump has the advantages of simple structure, energy-saving and environment-friendly properties and high fluid discharge efficiency.
Description
One, technical field
The utility model relates to the pump of the interior drilling fluid of suction mineshaft annulus in the oil drilling, is a kind of down-hole annular sucking screw pump.
Two, background technique
In recent years and since under-balanced drilling technology protection with find oil-gas layer, improve bit speed, prevent that aspect such as leakage from comparing the drilling well of conventional drilling liquid and having absolute predominance, therefore in the whole world, develop very fast.China also began to greatly develop under-balanced drilling technology after 2003, obtained scale by 2007 and 2008 and used.Under-balanced drilling technology be exactly in drilling process the head of liquid in the pit shaft less than a kind of drilling technology of the pore pressure on stratum.Because the drilling fluid density of configuration has only the purpose that just can reach under balance pressure drilling by special drilling liquid technology often greater than strata pressure equal yield density, particularly low-pressure stratum.Problems such as at present, the main method that reduces the pit shaft head of liquid has methods such as using gases, inflation, foam, solid palliative, and these methods all have shortcoming separately, and, bad adaptability huge as expense height, equipment, recovery difficult are big.
Three, summary of the invention
The utility model provides a kind of down-hole annular sucking screw pump, and it has solved and has reduced the big problem of pit shaft head of liquid difficulty in the existing under balance pressure drilling.
The technical solution of the utility model realizes by following measure: a kind of down-hole annular sucking screw pump comprises upper connection, stator, lower contact and rotor; The lower end of upper connection be fixedly connected with stator or with stator be one, the lower end of stator is installed with lower contact, the outer cover of stator is equipped with the rotor that the energy relative stator is rotated, and the upper end of rotor is installed in the outside, middle part of upper connection, and the lower end of rotor is installed in the outside, middle part of lower contact; There is epicoele the inside of upper connection, there is cavity of resorption the inside of lower contact, form rotor cavity between the inwall of rotor and the outer wall of stator, the last endoporus that is communicated with epicoele and rotor cavity is arranged at the bottom of upper connection, and the following endoporus that is communicated with cavity of resorption and rotor cavity is arranged at the top of lower contact; The outside of stator is evenly equipped with the spirality double wedge that is no less than three, it is corresponding with the sectional shape of spirality double wedge and Duo one spiral groove than the quantity of spirality double wedge to be evenly equipped with sectional shape on the inwall of rotor, there is spirality pump tooth in the outside of rotor, the axis of stator and the axis of rotor cavity have throw of eccentric, and a spirality double wedge and corresponding spiral groove maintenance engagement are arranged on the stator.
Be further optimization and/or improvements below to above-mentioned model utility technological scheme:
The sectional shape of above-mentioned spirality double wedge can be arc, and the sectional shape of spiral groove can keep the conjugation engagement with the sectional shape of spirality double wedge.
The upper end of above-mentioned rotor can be installed in the outside, middle part of upper connection by upper sleeve gasket, and the lower end of rotor can be installed in the outside, middle part of lower contact by lower sleeve gasket.
Can there be up big and down small last frustum the lower end of above-mentioned upper connection, and there is the up big and down small last conical surface the corresponding upward position of frustum and matches with last frustum on the upper inside wall of rotor cavity; Can there be up-small and down-big following frustum the upper end of lower contact, and there is the up-small and down-big following conical surface the corresponding position of frustum down and matches with following frustum on the lower inner wall of rotor cavity.
The quantity of above-mentioned spirality double wedge can be five, and the quantity of spiral groove can be six.
The quantity of above-mentioned spirality pump tooth can be six and be distributed in the outside of rotor.
The utility model reasonable and compact in structure, easy to use, it makes rotor rotate around stator by the spiral groove that circulating fluid promotes in the rotor, the spirality pump tooth that rotor drives its outside rotates and discharges mineshaft annulus liquid, to reduce the pressure of mineshaft annulus fluid column in the drilling operation course, reach the purpose of under balance pressure drilling and raising bit speed, can reduce the use of drilling fluid chemical agent in a large number, significantly improve drilling efficiency, reduce cost, have simple in structure, energy-conserving and environment-protective, characteristics that discharge opeing efficient is high.
Four, description of drawings
Accompanying drawing 1 is looked the sectional structure schematic representation for the master of the utility model most preferred embodiment.
Accompanying drawing 2 is analysed and observe the structure for amplifying schematic representation for A-A place in the accompanying drawing 1.
Coding in the accompanying drawing is respectively: 1 is upper connection, and 2 is stator, and 3 are lower contact, 4 is rotor, and 5 is epicoele, and 6 is cavity of resorption, 7 is rotor cavity, and 8 is last endoporus, and 9 are following endoporus, 10 is the spirality double wedge, and 11 is spiral groove, and 12 is spirality pump tooth, 13 is upper sleeve gasket, and 14 is lower sleeve gasket, and 15 is last frustum, 16 is the last conical surface, and 17 are following frustum, and 18 are the following conical surface.
Five, embodiment
The utility model is not subjected to following embodiment's restriction, can determine concrete mode of execution according to the technical solution of the utility model and actual conditions.
Below in conjunction with most preferred embodiment and accompanying drawing the utility model is further described:
Shown in accompanying drawing 1,2, this down-hole annular sucking screw pump comprises upper connection 1, stator 2, lower contact 3 and rotor 4; The lower end of upper connection 1 is fixedly connected with stator 2 or is one with stator 2, the lower end of stator 2 is installed with lower contact 3, the outer cover of stator 2 is equipped with the rotor 4 that energy relative stator 2 is rotated, the upper end of rotor 4 is installed in the outside, middle part of upper connection 1, and the lower end of rotor 4 is installed in the outside, middle part of lower contact 3; There is epicoele 5 inside of upper connection 1, there is cavity of resorption 6 inside of lower contact 3, form rotor cavity 7 between the outer wall of the inwall of rotor 4 and stator 2, the last endoporus 8 that is communicated with epicoele 5 and rotor cavity 7 is arranged at the bottom of upper connection 1, and the following endoporus 9 that is communicated with cavity of resorption 6 and rotor cavity 7 is arranged at the top of lower contact 3; The outside of stator 2 is evenly equipped with the spirality double wedge 10 that is no less than three, it is corresponding with the sectional shape of spirality double wedge 10 and Duo one spiral groove 11 than the quantity of spirality double wedge 10 to be evenly equipped with sectional shape on the inwall of rotor 4, there is spirality pump tooth 12 in the outside of rotor 4, the axis of the axis of stator 2 and rotor cavity 7 has throw of eccentric, and a spirality double wedge 10 and corresponding spiral groove 11 maintenance engagements are arranged on the stator 2.Constitute pump chamber between rotor 4 and its outside well bore wall or the casing wall, in drilling process, in rotor cavity 7, inject circulating fluid by epicoele 5, utilizing the impulse force of circulating fluid to drive rotor 4 as power source runs up, making rotor 4 drive spirality pump tooth 12 rotates, with upwards transportation of the drilling fluid in pit shaft or the sleeve pipe, need not special power under the mounting shaft like this, just can aspirate drilling fluid earthward, reduce the pressure of mineshaft annulus fluid column in the drilling operation course, to realize the purpose of under balance pressure drilling and raising bit speed.
Can according to actual needs above-mentioned down-hole annular sucking screw pump be made further optimization and/or improvements:
Shown in accompanying drawing 1,2, the sectional shape of spirality double wedge 10 is an arc, and the sectional shape of the sectional shape of spiral groove 11 and spirality double wedge 10 keeps the conjugation engagement.So that rotor cavity 7 keeps sealing to obtain relevant pressure, drive rotor 4 and run up.
Shown in accompanying drawing 1,2, the upper end of rotor 4 is installed in by upper sleeve gasket 13 outside the middle part of upper connection 1, and the lower end of rotor 4 is installed in the outside, middle part of lower contact 3 by lower sleeve gasket 14.By upper sleeve gasket 13 and lower sleeve gasket 14 rotor 4 is freely rotated.
Shown in accompanying drawing 1,2, there is up big and down small last frustum 15 lower end of upper connection 1, and there is the up big and down small last conical surface 16 the corresponding upward position of frustum 15 and matches with last frustum 15 on the upper inside wall of rotor cavity 7; There is up-small and down-big following frustum 17 upper end of lower contact 3, and there is the up-small and down-big following conical surface 18 the corresponding position of frustum 17 down and matches with following frustum 17 on the lower inner wall of rotor cavity 7.Cooperate with the following conical surface 18 with the last conical surface 16, following frustum 17 by last frustum 15, can make the rotation held stationary of rotor 4, keep the sealing of rotor cavity 7 simultaneously.
Shown in accompanying drawing 1,2, the quantity of spirality double wedge 10 is five, and the quantity of spiral groove 11 is six.The number of teeth of stator 2 and rotor 4 is decided by the hydraulic parameters of formation factor and system, and the quantity of spirality double wedge 10 and spiral groove 11 is few more, and the rotating speed of rotor 4 is high more, but moment of torsion is also more little.Under normal conditions, the quantity that makes spirality double wedge 10 is five, and moment of torsion is also comparatively suitable simultaneously can to make rotor 4 existing high rotational speed, is convenient to upwards transportation of the drilling fluid in pit shaft or the sleeve pipe.
Shown in accompanying drawing 1,2, the quantity of spirality pump tooth 12 is six and is distributed in the outside of rotor 4.With the discharge that guarantees the drilling fluid in pit shaft or the sleeve pipe higher efficient is arranged.
Above technical characteristics has constituted most preferred embodiment of the present utility model, and it has stronger adaptability and best implementation result, can increase and decrease non-essential technical characteristics according to actual needs, satisfies the demand of different situations.
The working procedure of the utility model most preferred embodiment is: at first, upper connection 1 of the present utility model is connected with the top drilling tool, lower contact 3 connects with lower drilling tool, and and drilling tool G.I.H together, note forbidding with the utility model be lowered into pregnant, undergauge, easily collapse, complicated well section such as leakiness, control its lowering velocity when transferring; Secondly, when treating that the utility model reaches predetermined well depth position, the turn on pump circulation, abundant bottom-hole cleaning is removed the landwaste precipitation in shaft bottom or is piled up; At this moment, circulating fluid enters epicoele 5 by the top drilling tool, flow in the rotor cavities 7 and promote spiral groove 11 by last endoporus 8 and rotate, make rotor 4 around stator 2 axial rotation, the spirality pump tooth 12 that rotor 4 drives its outside again rotates, with upwards transportation and discharge ground from mineshaft annulus of the drilling fluid in pit shaft or the sleeve pipe, the drilling fluids in the rotor cavity 7 flow into cavity of resorptions 6 and enter lower drilling tool from endoporus 9 down simultaneously, then the outflow of the annular space from drilling tool outside ground; At last, creep into finish after, the utility model is tripped out, with clear water circulation, clean up inner drilling fluid.
Claims (9)
1. a down-hole annular sucking screw pump is characterized in that comprising upper connection, stator, lower contact and rotor; The lower end of upper connection be fixedly connected with stator or with stator be one, the lower end of stator is installed with lower contact, the outer cover of stator is equipped with the rotor that the energy relative stator is rotated, and the upper end of rotor is installed in the outside, middle part of upper connection, and the lower end of rotor is installed in the outside, middle part of lower contact; There is epicoele the inside of upper connection, there is cavity of resorption the inside of lower contact, form rotor cavity between the inwall of rotor and the outer wall of stator, the last endoporus that is communicated with epicoele and rotor cavity is arranged at the bottom of upper connection, and the following endoporus that is communicated with cavity of resorption and rotor cavity is arranged at the top of lower contact; The outside of stator is evenly equipped with the spirality double wedge that is no less than three, it is corresponding with the sectional shape of spirality double wedge and Duo one spiral groove than the quantity of spirality double wedge to be evenly equipped with sectional shape on the inwall of rotor, there is spirality pump tooth in the outside of rotor, the axis of stator and the axis of rotor cavity have throw of eccentric, and a spirality double wedge and corresponding spiral groove maintenance engagement are arranged on the stator.
2. down-hole annular sucking screw pump according to claim 1, the sectional shape that it is characterized in that the spirality double wedge is an arc, the sectional shape of the sectional shape of spiral groove and spirality double wedge keeps the conjugation engagement.
3. down-hole annular sucking screw pump according to claim 1 and 2 is characterized in that the upper end of rotor is installed in by upper sleeve gasket outside the middle part of upper connection, and the lower end of rotor is installed in the outside, middle part of lower contact by lower sleeve gasket.
4. down-hole annular sucking screw pump according to claim 1 and 2 is characterized in that there is up big and down small last frustum the lower end of upper connection, and there is the up big and down small last conical surface the corresponding upward position of frustum and matches with last frustum on the upper inside wall of rotor cavity; There is up-small and down-big following frustum the upper end of lower contact, and there is the up-small and down-big following conical surface the corresponding position of frustum down and matches with following frustum on the lower inner wall of rotor cavity.
5. down-hole annular sucking screw pump according to claim 3 is characterized in that there is up big and down small last frustum the lower end of upper connection, and there is the up big and down small last conical surface the corresponding upward position of frustum and matches with last frustum on the upper inside wall of rotor cavity; There is up-small and down-big following frustum the upper end of lower contact, and there is the up-small and down-big following conical surface the corresponding position of frustum down and matches with following frustum on the lower inner wall of rotor cavity.
6. down-hole annular sucking screw pump according to claim 4, the quantity that it is characterized in that the spirality double wedge is five, the quantity of spiral groove is six.
7. down-hole annular sucking screw pump according to claim 5, the quantity that it is characterized in that the spirality double wedge is five, the quantity of spiral groove is six.
8. down-hole annular sucking screw pump according to claim 6, the quantity that it is characterized in that spirality pump tooth are six and are distributed in the outside of rotor.
9. down-hole annular sucking screw pump according to claim 7, the quantity that it is characterized in that spirality pump tooth are six and are distributed in the outside of rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201646114U CN201526452U (en) | 2009-11-04 | 2009-11-04 | Underground annulus suction screw pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201646114U CN201526452U (en) | 2009-11-04 | 2009-11-04 | Underground annulus suction screw pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201526452U true CN201526452U (en) | 2010-07-14 |
Family
ID=42517740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201646114U Expired - Lifetime CN201526452U (en) | 2009-11-04 | 2009-11-04 | Underground annulus suction screw pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201526452U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101725523B (en) * | 2009-11-04 | 2011-09-14 | 中国石油集团西部钻探工程有限公司吐哈钻井工艺研究院 | Down-hole annular sucking screw pump |
| CN102705140A (en) * | 2012-05-30 | 2012-10-03 | 中国石油化工集团公司 | Drilling power tool, drilling tool and drilling method for forming boreholes |
-
2009
- 2009-11-04 CN CN2009201646114U patent/CN201526452U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101725523B (en) * | 2009-11-04 | 2011-09-14 | 中国石油集团西部钻探工程有限公司吐哈钻井工艺研究院 | Down-hole annular sucking screw pump |
| CN102705140A (en) * | 2012-05-30 | 2012-10-03 | 中国石油化工集团公司 | Drilling power tool, drilling tool and drilling method for forming boreholes |
| CN102705140B (en) * | 2012-05-30 | 2014-08-20 | 中国石油化工集团公司 | Drilling power tool, drilling tool and drilling method for forming boreholes |
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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: 20100714 Effective date of abandoning: 20091104 |