CN103244612A - Underground reducer with pressure self-balancing system - Google Patents
Underground reducer with pressure self-balancing system Download PDFInfo
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- CN103244612A CN103244612A CN2013101778218A CN201310177821A CN103244612A CN 103244612 A CN103244612 A CN 103244612A CN 2013101778218 A CN2013101778218 A CN 2013101778218A CN 201310177821 A CN201310177821 A CN 201310177821A CN 103244612 A CN103244612 A CN 103244612A
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- retarder
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Abstract
The invention discloses an underground reducer with a pressure self-balancing system. The underground reducer comprises a sleeve, a guiding shaft, a reducer body and an output shaft. The reducer body comprises an annular sliding sleeve. The guiding shaft penetrates through an annular sliding sleeve inner ring to be connected with an output shaft, and the guiding shaft, the annular sliding sleeve and the output shaft are all arranged in the sleeve. The annular sliding sleeve is provided with an annular cavity, a piston and a spring are arranged in the annular cavity of the sliding sleeve, and the annular sliding sleeve and the guiding shaft are sealed through a dynamic sealing piece. By adjusting the pressure of lubricating oil inside the reducer body to enable pressure change of the lubricating oil to be the same as that of external slurry, effects of annular slurry pressure sudden change on the reducer body and the dynamic sealing piece of the reducer body are reduced, high-pressure sealing difficulty is reduced greatly, and an effect of protecting the dynamic sealing piece is achieved. In addition, as the well drilling depth is increased, the underground temperature is gradually increased, the lubricating oil itself can expand due to heat, inner pressure of the reducer is increased, the inner pressure of the reducer is adjusted through automatic overflowing of a dynamic sealing surface, and a purpose of self-balancing adjusting is achieved.
Description
Technical field
The present invention relates to the geological drilling field, particularly a kind of deep-well and ultradeep well of can be used for such as creeps at retarder under the big condition of high pressure and pressure range.
Background technique
In the prior art, in some drilling operations of industries such as petroleum drilling and mining industry, geological drilling, oil-gas mining, adopt turbodrill or helicoid hydraulic motor to realize that deep hole and ultradeep well creep into usually.Because the output speed of turbodrill itself can not satisfy the job requirement of rock bit well.At some in particular cases, the output characteristics of helicoid hydraulic motor does not satisfy the underground work requirement yet.In order to enlarge the operating range of turbodrill and helicoid hydraulic motor, need to use the down-hole speed reducer to be used for adjusting the output parameter of power drilling tool, to make it develop difficulty quite high because the down-hole retarder has characteristics such as radial dimension is serious limited.
The gear reducer turbodrill can adapt to the requirement of modern drilling technology, cooperates the PDC drill bit can improve the drilling well effect, shortens drilling period, reduces overall cost.Use at present that retarder is NGW type planetary reducer under maximum oil wells, the characteristics of this retarder are that driving parts is mainly radially arranged, its structural feature just in time requires opposite with " radial dimension is subjected to strict restriction, axial dimension is unrestricted " of underground equipment, often too small because of module in the practical application, cause gear teeth resistance to flexure deficiency and very fast damage.The employing fixed shaft gear train is realized gearing down, and this transmission device damping performance is poor, the transmission stability energy is on the low side, the life-span short, be difficult to processing and assembling.
In deep-well and the ultradeep well drilling process, the pressure surge scope is very big, its reason mainly contains: downhole tool will bear the hydrostatic pressure of drilling fluid and the pumping pressure of drilling fluid pump, and along with drilling depth increases, the drilling well fluid column also increases the downhole tool internal pressure thereupon; Drilling fluid is along with bore meeting different stratum, needs base area stressor layer, drilling fluid to take requirements needs such as lithology energy and adjusts mud balance etc. and replace slurry to operate, and starches misoperation if replace, and can cause the sudden change of the interior annular pressure of well; In the process of drilling tool round trip, unexpected hypervelocity or deceleration-operation also can cause the fluctuation of drilling liquid pressure in the well.
From above-mentioned analysis as can be known, the environment of down-hole retarder work is pressure drilling fluid confined pressure environment, and drilling liquid pressure is subjected to objective natural causes and the people is the influence of operation factor, and unexpected pressure surge can take place.This structure and sealing influence to the down-hole retarder is very big.
Often because existing a large amount of solid particles that wearing and tearing such as gear and bearing are accelerated in the drilling fluid, the life-span is on the low side for the retarder of open type.The retarder of enclosed has proposed very high requirement to the withstand voltage, heat-resisting of retarder and sealing, has increased design difficulty.
In sum, existing design of creeping into the down-hole retarder for deep-well and ultradeep well still has improved necessity.
Summary of the invention
At the deficiencies in the prior art, the object of the present invention is to provide a kind ofly can be full of creeping in the environment of drilling fluid at down-hole high temperature, high-pressure unit and use, and can solve the down-hole retarder of withstand voltage, the heat-resisting and sealing problem in the drilling process of down-hole.
Technological scheme of the present invention is achieved in that
A kind of down-hole retarder with pressure self-balancing system, comprise sleeve, the axis of guide, retarder and output shaft, described retarder comprises an annular sliding sleeve, the described axis of guide passes described annular sliding sleeve inner ring and is connected with described output shaft, the described axis of guide, described annular sliding sleeve and described output shaft all are arranged in the described sleeve, described annular sliding sleeve has annular chamber, is provided with piston and spring in the annular chamber of described sliding sleeve, seals by dynamic seal between described annular sliding sleeve and the described axis of guide.
The above-mentioned down-hole retarder with pressure self-balancing system, position above the corresponding described annular sliding sleeve of described sleeve is provided with a horizontal slurry channel, also comprise the upper support bearing, described upper support bearing is arranged in the described sleeve, described upper support bearing housing is on the described axis of guide, described upper support bearing is arranged on the top of described horizontal slurry channel, has a vertical slurry channel at described upper support bearing and passes conducting above described horizontal slurry channel and the described annular sliding sleeve.
The above-mentioned down-hole retarder with pressure self-balancing system, the mud hole opening of outer conducting place of described horizontal slurry channel and described sleeve is towards oblique below.
The above-mentioned down-hole retarder with pressure self-balancing system, be tiltedly installed with filter screen in the described horizontal slurry channel, described filter screen is kept apart one section vertical slurry channel of described horizontal slurry channel top and one section vertical slurry channel of described horizontal slurry channel below, have helical raised on the described filter screen, the Hand of spiral of described helical raised and the drilling tool of using down-hole of the present invention retarder to creep into sense of rotation consistent.
The above-mentioned down-hole retarder with pressure self-balancing system, also comprise motive sealing adjusting positioning device, described motive sealing is regulated positioning device and is comprised push rod and regulate setscrew nut, described push rod cross setting is fixedlyed connected with the sealing rotating ring of described dynamic seal, and described push rod and described annulus bottom surface have certain distance; Described adjusting setscrew nut is threaded with the stationary seal ring of described motive sealing and withstands described push rod.
The above-mentioned down-hole retarder with pressure self-balancing system is provided with oil hole in the position of the corresponding described annular sliding sleeve of described sleeve, and described oil hole is communicated with described sliding sleeve annular chamber by one-way valve.
The above-mentioned down-hole retarder with pressure self-balancing system, also comprise planetary gear train, described output shaft and the described axis of guide link together by described planetary gear train, and the described axis of guide and described planetary gear train link together by coupling, described oil hole and described planetary gear train conducting.
The above-mentioned down-hole retarder with pressure self-balancing system also comprises connecting sleeve and lower supporting bearing, and described connecting sleeve is arranged on described sleeve lower end, and described output shaft extend in the described connecting sleeve and by lower supporting bearing and is supported in the described sleeve.
The above-mentioned down-hole retarder with pressure self-balancing system, the output shaft place above described lower joint sleeve seals by the floating seal mode.
The above-mentioned down-hole retarder with pressure self-balancing system, ring has a shoulder in the described annular chamber bottom, described spring lower end is enclosed within on the described shoulder, is provided with alignment bearing between described annular sliding sleeve and the described axis of guide, and described alignment bearing is positioned at the top of described dynamic seal.
The invention has the beneficial effects as follows: the down-hole retarder with pressure self-balancing system is consistent its pressure variation with outside mud liquid by the pressure of regulating retarder internal lubrication oil, reduced the influence that retarder and motive sealing thereof are subjected to bad empty mud hydraulic coupling sudden change, greatly reduced the difficulty of high pressure sealing and play the effect of protecting dynamic seal; In addition, along with the increase of drilling depth, downhole temperature raises gradually, and lubricant oil itself also can be because heat expands, and the retarder internal pressure raises, and adjusts the retarder internal pressure by motive sealing face automatic overflow, reaches the purpose that self balancing is regulated.
Description of drawings
Fig. 1 has the structural representation of the down-hole retarder of pressure self-balancing system for the present invention,
Fig. 2 has the structural representation of output shaft place floating seal of the down-hole retarder of pressure self-balancing system for the present invention.
Among the figure: 1-sleeve, 2-annular sliding sleeve, 3-spring, the 4-piston, 5-dynamic seal, 6-lower supporting bearing, 7-upper support bearing, 8-planetary gear train, 9-shoulder, the vertical slurry channel of 101-, the horizontal slurry channel of 102-, 11-connecting sleeve, the 12-axis of guide, 13-output shaft, 14-coupling master 1 attached-filtration host 1 border-push rod, 17-regulates setscrew nut, 18-alignment bearing.
Embodiment
The present invention is described further by reference to the accompanying drawings:
As shown in Figure 1, a kind of down-hole retarder with pressure self-balancing system, comprise sleeve 1, the axis of guide 12, retarder and output shaft 13, described retarder comprises an annular sliding sleeve 2, the described axis of guide 12 passes described annular sliding sleeve 2 inner rings and is connected with described output shaft 13, the described axis of guide 12, described annular sliding sleeve 2 and described output shaft 13 all are arranged in the described sleeve 1, described annular sliding sleeve 2 has annular chamber, be provided with piston 4 and spring 3 in the annular chamber of described sliding sleeve, seal by dynamic seal 5 between described annular sliding sleeve 2 and the described axis of guide 12.
Position above described sleeve 1 corresponding described annular sliding sleeve 2 is provided with a horizontal slurry channel 102, also comprise upper support bearing 7, described upper support bearing 7 is arranged in the described sleeve 1, described upper support bearing 7 is enclosed within on the described axis of guide 12, described upper support bearing 7 is arranged on the top of described horizontal slurry channel 102, has a vertical slurry channel 101 at described upper support bearing 7 and passes conducting above described horizontal slurry channel 102 and the described annular sliding sleeve 2.
The mud hole opening of described horizontal slurry channel 102 and described sleeve 1 outer conducting place is towards oblique below, and the bulk residue of mud hole opening in oblique below can convenient mud flows out in the mud hole.
Be tiltedly installed with filter screen 15 in the described horizontal slurry channel 102, described filter screen 15 is kept apart one section vertical slurry channel 101 of described horizontal slurry channel 102 tops and one section vertical slurry channel 101 of described horizontal slurry channel 102 belows, filter screen 15 can be so that the bulk mud residue that gets off from the top be trapped, prevent that it from entering into the damage that annular sliding sleeve 2 top positions cause retarder, filter screen 15 is obliquely installed the bulk mud residue of being more convenient for and is gone out by mud from the mud hole, has helical raised on the described filter screen 15, the Hand of spiral of described helical raised and the drilling tool of using down-hole of the present invention retarder to creep into sense of rotation consistent, helical raised can effectively limit movement of particles, is beneficial to the mud endoparticle and discharges.
Also comprise motive sealing adjusting positioning device, described motive sealing is regulated positioning device and is comprised push rod 16 and regulate setscrew nut 17, described push rod 16 cross settings are fixedlyed connected with the sealing rotating ring of described dynamic seal 5, and described push rod 16 has certain distance with described annulus 1 bottom surface; Described adjusting setscrew nut 17 is threaded with the stationary seal ring of described motive sealing and withstands described push rod 16, the motive sealing controlling device can be regulated the gasket factor of dynamic seal 5 sealing surfaces, can set an overflow critical value roughly according to the actual pressure range that will face.
Position at described sleeve 1 corresponding described annular sliding sleeve 2 is provided with oil hole, and described oil hole is communicated with described sliding sleeve annular chamber by one-way valve.
Also comprise planetary gear train 8, described output shaft 13 and the described axis of guide 12 link together by described planetary gear train 8, and the described axis of guide 12 and described planetary gear train 8 link together by coupling 14, described oil hole and 8 conductings of described planetary gear train.
Also comprise connecting sleeve 11 and lower supporting bearing 6, described connecting sleeve 11 is arranged on described sleeve 1 lower end, and described output shaft 13 extend in the described connecting sleeve 11 and by lower supporting bearing 6 and is supported in the described sleeve 1.
As shown in Figure 2, output shaft 13 places above described lower joint sleeve 11 seal by the floating seal mode, and floating seal can effectively prevent from revealing.
Ring has a shoulder 9 in the described annular chamber bottom, described spring 3 lower ends are enclosed within on the described shoulder 9, be provided with alignment bearing 18 between described annular sliding sleeve 2 and the described axis of guide 12, described alignment bearing 18 is positioned at the attached top of described dynamic seal, alignment bearing 18 can be set upright shoulder 9, and improves the kinematic accuracy of the attached sealing rotating ring of dynamic seal.
The annular chamber of annular sliding sleeve 2 is sealed up by piston 4, can inject lubricant oil in the annular chamber of annular sliding sleeve 2 and shape shape train by the oil hole on the sleeve 1, and the lubricant oil stowing pressure moves and compresses spring 3 and realize along sliding sleeve by piston 4.
Working procedure with down-hole retarder of pressure self-balancing system:
Mud liquid enters in the sleeve 1 from the mud hole; arrive the top of annular sliding sleeve 2 then by slurry channel; along with the injection of mud liquid will be exerted pressure to piston 4 gradually; piston 4 because the extruding meeting of mud liquid along annular sliding sleeve 2 inwalls to lower slider and compress spring 3; continuous extruding along with piston 4; lubricating oil pressure in the annular sliding sleeve 2 increases and reaches and changes consistent with outside mud hydraulic coupling; reduced retarder and motive sealing thereof and received the influence of annular space mud hydraulic coupling sudden change, thereby greatly reduced the difficulty of high pressure sealing and play the effect of protecting the motive sealing part.When outside mud hydraulic coupling is excessive, because inner positive pressure design, the internal pressure lubricant oil of adopting of retarder can not enter retarder internal contamination lubricant oil by the overflow of pressure motive sealing face to guarantee mud liquid.
In addition, along with the increase of drilling depth, downhole temperature raises gradually, and lubricant oil itself also can be because heat expands, and the retarder internal pressure is too high, adjusts the retarder internal pressure by motive sealing face automatic overflow, reaches the purpose that the pressure self balancing is regulated.
In order to satisfy the requirement of drilling engineering, in retarder, take the pressure self-balancing system to guarantee its energy transfer larger torque, improve withstand voltage, the heat-resisting and sealability of retarder simultaneously, reliability and the working life of having improved the down-hole retarder, be particularly useful for creeping into of deep-well and ultradeep well.
Above-described embodiment only is for the invention example clearly is described, and is not the restriction to the invention embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give all mode of executions exhaustive.All any apparent variations of being extended out within the spirit and principles in the present invention or change still are among the protection domain of the invention claim.
Claims (10)
1. down-hole retarder with pressure self-balancing system, it is characterized in that, comprise sleeve, the axis of guide, retarder and output shaft, described retarder comprises an annular sliding sleeve, the described axis of guide passes described annular sliding sleeve inner ring and is connected with described output shaft, the described axis of guide, described annular sliding sleeve and described output shaft all are arranged in the described sleeve, described annular sliding sleeve has annular chamber, be provided with piston and spring in the annular chamber of described sliding sleeve, seal by dynamic seal between described annular sliding sleeve and the described axis of guide.
2. the down-hole retarder with pressure self-balancing system according to claim 1, it is characterized in that, position above the corresponding described annular sliding sleeve of described sleeve is provided with a horizontal slurry channel, also comprise the upper support bearing, described upper support bearing is arranged in the described sleeve, described upper support bearing housing is on the described axis of guide, described upper support bearing is arranged on the top of described horizontal slurry channel, has a vertical slurry channel at described upper support bearing and passes conducting above described horizontal slurry channel and the described annular sliding sleeve.
3. the down-hole retarder with pressure self-balancing system according to claim 2 is characterized in that, the mud hole opening of outer conducting place of described horizontal slurry channel and described sleeve is towards oblique below.
4. the down-hole retarder with pressure self-balancing system according to claim 3, it is characterized in that, be tiltedly installed with filter screen in the described horizontal slurry channel, described filter screen is kept apart one section vertical slurry channel of described horizontal slurry channel top and one section vertical slurry channel of described horizontal slurry channel below, has helical raised on the described filter screen.
5. according to the arbitrary described down-hole retarder with pressure self-balancing system of claim 1-4, it is characterized in that, also comprise motive sealing adjusting positioning device, described motive sealing is regulated positioning device and is comprised push rod and regulate setscrew nut, described push rod cross setting is fixedlyed connected with the sealing rotating ring of described dynamic seal, and described push rod and described annulus bottom surface have certain distance; Described adjusting setscrew nut is threaded with the stationary seal ring of described motive sealing and withstands described push rod.
6. the down-hole retarder with pressure self-balancing system according to claim 5 is characterized in that, is provided with oil hole in the position of the corresponding described annular sliding sleeve of described sleeve, and described oil hole is communicated with described sliding sleeve annular chamber by one-way valve.
7. the down-hole retarder with pressure self-balancing system according to claim 6, it is characterized in that, also comprise planetary gear train, described output shaft and the described axis of guide link together by described planetary gear train, the described axis of guide and described planetary gear train link together by coupling, described oil hole and described planetary gear train conducting.
8. the down-hole retarder with pressure self-balancing system according to claim 7, it is characterized in that, also comprise connecting sleeve and lower supporting bearing, described connecting sleeve is arranged on described sleeve lower end, and described output shaft extend in the described connecting sleeve and by lower supporting bearing and is supported in the described sleeve.
9. the down-hole retarder with pressure self-balancing system according to claim 8 is characterized in that, the output shaft place above described lower joint sleeve seals by the floating seal mode.
10. according to the arbitrary described down-hole retarder with pressure self-balancing system of claim 1-4, it is characterized in that, ring has a shoulder in the described annular chamber bottom, described spring lower end is enclosed within on the described shoulder, be provided with alignment bearing between described annular sliding sleeve and the described axis of guide, described alignment bearing is positioned at the top of described dynamic seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310177821.8A CN103244612B (en) | 2013-05-14 | 2013-05-14 | There is the down-hole decelerator of pressure self-balancing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310177821.8A CN103244612B (en) | 2013-05-14 | 2013-05-14 | There is the down-hole decelerator of pressure self-balancing system |
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| Publication Number | Publication Date |
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| CN103244612A true CN103244612A (en) | 2013-08-14 |
| CN103244612B CN103244612B (en) | 2016-03-09 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2229550Y (en) * | 1995-09-20 | 1996-06-19 | 李进 | Bottomhole reducer for oil well |
| CN1443944A (en) * | 2003-04-11 | 2003-09-24 | 中国海洋石油总公司 | Speed-reducing device for pipe or down-hole |
| CN101029675A (en) * | 2006-02-27 | 2007-09-05 | 杨天博 | Deep-well reducer |
| CN101225738A (en) * | 2008-02-19 | 2008-07-23 | 鲍锋 | Oil field down-hole rotary type mechanical transmission means |
| JP2012209991A (en) * | 2011-03-29 | 2012-10-25 | Tokuo Takamura | Electric cylinder device with both-end flange type motor |
| CN203239864U (en) * | 2013-05-14 | 2013-10-16 | 中国地质大学（北京） | Downhole speed reducer with pressure self-balancing system |
-
2013
- 2013-05-14 CN CN201310177821.8A patent/CN103244612B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2229550Y (en) * | 1995-09-20 | 1996-06-19 | 李进 | Bottomhole reducer for oil well |
| CN1443944A (en) * | 2003-04-11 | 2003-09-24 | 中国海洋石油总公司 | Speed-reducing device for pipe or down-hole |
| CN101029675A (en) * | 2006-02-27 | 2007-09-05 | 杨天博 | Deep-well reducer |
| CN101225738A (en) * | 2008-02-19 | 2008-07-23 | 鲍锋 | Oil field down-hole rotary type mechanical transmission means |
| JP2012209991A (en) * | 2011-03-29 | 2012-10-25 | Tokuo Takamura | Electric cylinder device with both-end flange type motor |
| CN203239864U (en) * | 2013-05-14 | 2013-10-16 | 中国地质大学（北京） | Downhole speed reducer with pressure self-balancing system |
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| CN103244612B (en) | 2016-03-09 |
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