CN104595423A - Two-gear gear speed reducing box used for top driving well drilling device - Google Patents

Two-gear gear speed reducing box used for top driving well drilling device Download PDF

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Publication number
CN104595423A
CN104595423A CN201510032835.XA CN201510032835A CN104595423A CN 104595423 A CN104595423 A CN 104595423A CN 201510032835 A CN201510032835 A CN 201510032835A CN 104595423 A CN104595423 A CN 104595423A
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CN
China
Prior art keywords
gear
grade
bearing
grades
shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201510032835.XA
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Chinese (zh)
Inventor
刘广华
刘新立
庞辉仙
谢宏峰
孙明寰
邹连阳
熊晟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China National Petroleum Corp
CNPC Engineering Technology R&D Co Ltd
Beijing Petroleum Machinery Co Ltd
Original Assignee
China National Petroleum Corp
CNPC Drilling Research Institute Co Ltd
Beijing Petroleum Machinery Factory
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Application filed by China National Petroleum Corp, CNPC Drilling Research Institute Co Ltd, Beijing Petroleum Machinery Factory filed Critical China National Petroleum Corp
Priority to CN201510032835.XA priority Critical patent/CN104595423A/en
Publication of CN104595423A publication Critical patent/CN104595423A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H3/00Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
    • F16H3/02Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion
    • F16H3/08Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts
    • F16H3/087Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts characterised by the disposition of the gears
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/02Gearboxes; Mounting gearing therein
    • F16H57/023Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/02Gearboxes; Mounting gearing therein
    • F16H57/038Gearboxes for accommodating bevel gears
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H2700/00Transmission housings and mounting of transmission components therein; Cooling; Lubrication; Flexible suspensions, e.g. floating frames

Abstract

The invention provides a two-gear gear speed reducing box used for a top driving well drilling device. The two-gear gear speed reducing box comprises a box body and mechanisms arranged in the box body, wherein each input mechanism comprises an input shaft and a grade-I low-speed gear driving gear and a grade-I high-speed gear driving gear which sleeve the periphery of the input shaft; each middle transmission mechanism comprises a middle shaft, and a grade-I low-speed gear driven gear, a grade-I high-speed gear driven gear and a grade-II driving gear which sleeve the middle shaft; an output mechanism comprises an output shaft and a grade-II driven gear which sleeves the output shaft; each speed changing mechanism comprises a sliding sleeve sleeving the input shaft; the sliding sleeves are mounted among the peripheries of the input shafts, and the inner walls of central holes of the grade-I low-speed gear driving gears and the grade-I high-speed gear driving gears respectively, slide along the input shafts, are matched with the inner walls of the central holes of the grade-I low-speed gear driving gears and the grade-I high-speed gear driving gears, and drive the grade-I low-speed gear driven gear pair and the grade-I high-speed gear driven gear pair to rotate. Compared with the prior art, the rotary speed output range can be improved by more than 2-3 times.

Description

For two grades of gear reduction boxs of top-drive drilling
Technical field
The present invention relates to the technical field of transmission device in the top drive drilling for oil-well rig, particularly a kind of two grades of gear reduction boxs.
Background technique
Conventional top-drive drilling all adopts one grade of gear reduction box, and motor reel is laid the driving gear that a diameter is less, and the driven gear larger with being arranged on diameter on jack shaft forms I grade of speed reducing gear pair.Gear jack shaft being positioned at the diameter of bottom less is II grade of driving gear, forms II grade of speed reducing gear pair with the gearwheel be arranged on output shaft.By double reduction, output speed scope is 0 ~ 220r/min.When output speed is within the scope of 0 ~ 110r/min, Driving Torque is nominal torque, and does not change with output speed change; When output speed is very low, the nominal torque of 2 times in the short time, can be obtained, meet requirement that is upper, shackle.When output speed is from 100r/min ~ 220r/min scope, Driving Torque reduces with the increase of output speed, maintains output power constant.
In recent years, new technology polycrystalline diamond compact bit (PDC drill bit) is with the fast advantage of its high rotating speed, low the pressure of the drill and rate of penetration, require that output speed (i.e. the rotating speed of the drilling rod) scope of speed reducer brings up to 0 ~ 600r/min, even 800r/min.And the output speed scope of existing one grade of gear reduction box is only 0 ~ 220r/min, the needs of PDC technology rapid drilling cannot be met.
In addition, the mode also having a kind of directly driving type top to drive, does not arrange gear reduction box between motor and drilling rod, and motor Direct driver drilling rod rotates.The speed range of directly driving the torque such as grade of motor is 0 ~ 110r/min, and the speed range of constant power is 100 ~ 220r/min.Its output speed scope is 0 ~ 220r/min, cannot meet the needs of PDC technology rapid drilling.Meanwhile, for ensureing motor Driving Torque and boundary dimension, the rotating speed of motor just can not improve a lot, also cannot meet the needs of PDC technology rapid drilling.
Summary of the invention
Improve the technical problem of output speed for solving, the present invention proposes a kind of two grades of gear reduction boxs for top-drive drilling, when guaranteeing the reliable and long service life of running, meets output speed in a big way.
The invention provides a kind of two grades of gear reduction boxs for top-drive drilling, comprise casing, and be arranged on input mechanism in described casing, intermediate transfer mechanism, output mechanism and gear;
Described input mechanism, comprises input shaft and is enclosed within I grade of bottom gear driving gear and I grade of top gear driving gear of described input shaft periphery;
Described intermediate transfer mechanism, comprise jack shaft and be sleeved on I grade of bottom gear driven gear on described jack shaft, I grade of top gear driven gear and II grade of driving gear, described I grade of bottom gear driven gear is meshed with described I grade of bottom gear driving gear, form I grade of bootom gear pair, described I grade of top gear driven gear is meshed with described I grade of top gear driving gear, forms I grade of high speed gear's pair;
Described output mechanism, comprises output shaft and is sleeved on II grade of driven gear on described output shaft; Described II grade of driven gear is meshed with described II grade of driving gear;
Described gear, comprise the flip sleeve be sleeved on described input shaft, described flip sleeve is placed between the center bore inner wall of described input shaft periphery and described I grade of bottom gear driving gear and the center bore inner wall of described I grade of top gear driving gear, described flip sleeve is along described input shaft slippage, match with the center bore inner wall of described I grade of bottom gear driving gear and the center bore inner wall of described I grade of top gear driving gear respectively, and drive described I grade of bootom gear secondary and described I grade of high speed gear pair to rotate respectively.
Further, the periphery of described flip sleeve arranges bottom gear external splines and top gear external splines; On the center bore inner wall of described I grade of bottom gear driving gear and on the center bore inner wall of described I grade of top gear driving gear, bottom gear internal spline and top gear internal spline are set respectively;
Described bottom gear external splines matches with described bottom gear internal spline, drives described I grade of bootom gear secondary motion, now described I grade of high speed gear pair idle running; Described top gear external splines matches with described top gear internal spline, drives described I grade of high speed gear's secondary motion, now described I grade of bootom gear pair idle running.
As the enforceable mode of one, described input shaft is motor reel, and described gear also comprises the oil hydraulic cylinder being placed in described bottom half, and described oil hydraulic cylinder is connected with described flip sleeve and drives the sliding motion of described flip sleeve.
Further, described input shaft, described jack shaft and described output shaft are parallel to each other, and are vertically arranged in described casing.
As the enforceable mode of one, the reduction speed ratio of described I grade of bootom gear pair is 2 ~ 3 times of the reduction speed ratio of described I grade of high speed gear's pair; Described I grade of bottom gear driven gear is positioned at the top of described I grade of top gear driven gear, and described II grade of driving gear is between described I grade of bottom gear driven gear and described I grade of top gear driven gear;
Described output shaft is set with described main bearing and hold down bearing, and described main bearing is positioned at the below of described II grade of driven gear, and described hold down bearing is positioned at the top of described II grade of driven gear.
Further, on described input shaft, set gradually clutch shaft bearing, the second bearing, the 3rd bearing and the 4th bearing from top to bottom; Described I grade of bottom gear driving gear is between described clutch shaft bearing and described second bearing, and described I grade of top gear driving gear is between described 3rd bearing and described 4th bearing.
Further, described casing comprises lower box, upper box lid and the bearing support with upper shed; Described upper box lid buckle closure is in the upper shed of described lower box, and described I grade of high speed gear's pair is placed in described lower box; Described second bearing, described 3rd bearing are all connected with described bearing support is detachable, and described bearing support is connected with described lower box is detachable, and described clutch shaft bearing is connected with described upper box lid, and described 4th bearing is connected with described lower box.
Further, spline fitted is passed through between described flip sleeve and described input shaft.
As the enforceable mode of one, the quantity of described input mechanism, described intermediate transfer mechanism, described gear and described output mechanism is one.
As the enforceable mode of another kind, the quantity of described input mechanism, described gear and described intermediate transfer mechanism is two, the quantity of described output mechanism is one, and described input mechanism, described gear, described intermediate transfer mechanism are symmetrically distributed in the both sides of described output shaft with drawing near respectively.
Further, described I grade of bottom gear driving gear, described I grade of top gear driving gear, described I grade of bottom gear driven gear, described I grade of top gear driven gear, described II grade of driving gear and described II grade of driven gear are helical gear.
The present invention is compared to the beneficial effect of prior art: two grades of gear reduction boxs for top-drive drilling adopt two grades, and the rotating speed achieving 2 ~ 3 times of scopes exports.Closely, compared with one grade of gear reduction box, overall dimensions does not increase arrangement.Adopt spline coupling, when transmitting torque, all spline tooths engage simultaneously, are conducive to the contact and the extrusion stress that reduce spline bound fraction, avoid premature fatigue to damage, and improve reliability and the working life of application.
Lower box for load-bearing is monolithic construction, can bear maximum drilling rod load, and easy assembly and disassembly.The axial force of I grade of bottom gear driving gear and radial force are born by clutch shaft bearing and the second bearing, the axial force of I grade of top gear driving gear and radial force are born by the 3rd bearing and the 4th bearing, produce obvious noise and vibration when avoiding the gear of prior art excessive with the splined matching gap between input shaft and cause engaging.Therefore, two grades of gear reduction box runnings for top-drive drilling of the present invention are reliable, long service life.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiments of the invention 1;
Fig. 2 is the structural representation of embodiments of the invention 2.
Reference character:
10-input shaft; 12-I grade of bottom gear driving gear; 14-I grade of top gear driving gear; 15-clutch shaft bearing; 16-second bearing; 17-the 3rd bearing; 18-the 4th bearing;
20-jack shaft; 22-I grade of bottom gear driven gear; 24-I grade of top gear driven gear; 26-II grade of driving gear;
40-flip sleeve; 42-oil hydraulic cylinder;
52-lower box; 54-upper box lid; 56-bearing support; 57-bolt;
30-output shaft; 31-hold down bearing; 32-main bearing; 33-alignment bearing; 36-II grade of driven gear;
60-motor; 70-drilling rod.
Embodiment
Below in conjunction with accompanying drawing, to above-mentioned being clearly and completely described with other technical characteristics and advantage of the present invention.Obviously, described embodiment is only section Example of the present invention, instead of whole embodiment.
Refer to shown in Fig. 1, a kind of two grades of gear reduction boxs for top-drive drilling of the present invention, for transmission between motor and drilling rod, comprise casing, input mechanism, intermediate transfer mechanism, output mechanism and gear.Wherein input mechanism, intermediate transfer mechanism, output mechanism and gear are installed in casing.
Input mechanism comprises input shaft 10, I grade of bottom gear driving gear 12 and I grade of top gear driving gear, 14, I grade of bottom gear driving gear 12 and I grade of top gear driving gear 14 and is all enclosed within input shaft 10 periphery.In gear reduction box, the reduction speed ratio scope of bottom gear is 8 ~ 12, and the reduction speed ratio scope of top gear is 3 ~ 6.
Intermediate transfer mechanism comprises jack shaft 20 and I grade of bottom gear driven gear, 22, I grade of top gear driven gear 24 of being sleeved on jack shaft 20 and II grade of driving gear 26.I grade of bottom gear driven gear 22 is meshed with I grade of bottom gear driving gear 12, forms I grade of bootom gear pair; I grade of top gear driven gear 24 is meshed with I grade of top gear driving gear 14, forms I grade of high speed gear's pair.
Output mechanism comprises output shaft 30 and II grade of driven gear, 36, the II grade of driven gear 36 be sleeved on output shaft 30 is meshed with II grade of driving gear 26, forms II grade of gear pair.
Gear comprises and is sleeved on flip sleeve 40 on input shaft 10 and oil hydraulic cylinder 42, and flip sleeve 40 is placed between the center bore inner wall of input shaft 10 periphery and I grade of bottom gear driving gear 12 and the center bore inner wall of I grade of top gear driving gear 14.Flip sleeve 40, along input shaft 10 slippage, matches with the center bore inner wall of I grade of bottom gear driving gear 12, drives I grade of bootom gear pair to rotate; Flip sleeve 40, along input shaft 10 slippage, matches with the center bore inner wall of I grade of top gear driving gear 14, drives I grade of high speed gear's pair to rotate.
Gear is installed on input mechanism, input shaft 10 and flip sleeve 40 only bear torque, not by moment of flexure, therefore the diameter of input shaft 10 can design relatively thin, the wall thickness of flip sleeve 40 can design relatively thin, and this is also conducive to controlling the overall dimensions for two grades of gear reduction boxs of top-drive drilling.In addition, input shaft 10 is variable-speed shaft, and its rotating ratio is higher, and suffered torque is smaller, can guarantee there are enough linking intensities like this.
Adopt the gear reduction box of two grades, greatly expand the scope of output speed, and higher output speed can be reached, meet the requirement of oil-well rig under various drilling condition to greatest extent.The switching between bottom gear and top gear can be realized by hydraulically powered gear.Adopt two grades of gear reduction boxs of top-drive drilling, output speed (i.e. the rotating speed of the drilling rod 70) scope of existing one grade of top being driven gear reduction box, from 0 ~ 220r/min, spreads to 0 ~ 600r/min, even 800r/min.
The present invention, when bottom gear, waits the output speed scope of torque to be 0 ~ 110r/min, and the output speed scope of constant power is 110r/min ~ 220r/min; Obtain the nominal torque of twice in short time, very large Driving Torque can be obtained, meet requirement that is upper, shackle; When well depth is more than 4000m ~ 5000m, drives screw rod or the turbodrill of down-hole, rod rotation speed is accelerated to 400r/min ~ 600r/min, realizes the rapid drilling of PDC drill bit.In specific area, as the reaming hole, drifting, unessential wildcat well etc. of shallow land well, marine large diameter top layer well, drive tricone bit with bottom gear.
The present invention is when top gear, output speed scope Deng torque is 0 ~ 220r/min, the output speed scope of constant power is 220r/min ~ 600r/min, even 800r/min, the rotating speed of drilling rod 70 can be brought up to 400r/min ~ 600r/min, even 800r/min, realizes the rapid drilling of PDC drill bit.Over nearly 20 years, adapt to high rotating speed, low the pressure of the drill because new technology PDC drill bit has, increase substantially the advantage of bit speed, fast fetching is for traditional tricone bit.
The present invention can adapt to the drilling well needs of various geologic structure, when well depth is at 4000m ~ below 5000m, with top gear Direct driver PDC drill bit, realizes high speed drilling well; Increase substantially bit speed.When well depth is more than 4000m ~ 5000m, with bottom gear by helicoid hydraulic motor or turbodrill, drill speed is accelerated to 400r/min ~ 600r/min, drive PDC drill bit to realize high speed drilling well.
As the enforceable mode of one, the periphery of flip sleeve 40 is arranged bottom gear external splines and top gear external splines; On the center bore inner wall of I grade of bottom gear driving gear 12 and on the center bore inner wall of I grade of top gear driving gear 14, bottom gear internal spline and top gear internal spline are set respectively.Bottom gear external splines matches with top gear internal spline, drives I grade of bootom gear secondary motion, now I grade of high speed gear's pair idle running; Top gear external splines matches with top gear internal spline, drives I grade of high speed gear's secondary motion, now I grade of bootom gear pair idle running.
More preferably, the bottom gear external splines of flip sleeve 40 and top gear external splines respectively near the two ends of flip sleeve 40, and have predetermined length respectively.In the present embodiment, bottom gear external splines and the top gear external splines of flip sleeve 40 are involute outer spline; The bottom gear internal spline of the I grade of bottom gear driving gear 12 matched with bottom gear external splines, the top gear internal spline of the I grade of top gear driving gear 14 matched with top gear external splines is involute inner spline.Flip sleeve 40 and all adopt spline coupling between I grade of bottom gear driving gear 12 and I grade of top gear driving gear 14, when transmitting torque, all spline tooths engage simultaneously, be conducive to the contact and the extrusion stress that reduce spline bound fraction, avoid premature fatigue to damage, improve reliability and the working life of application.
Further, connected by rectangle or involute splines between flip sleeve 40 with input shaft 10.If the internal spline of flip sleeve 40 and the external splines of input shaft 10 are that rectangular spline coordinates, although there is larger matching gap, but because I grade of bottom gear driving gear 12 and I grade of top gear driving gear 14 bear radial force and axial force by clutch shaft bearing 15 and the second bearing 16 and the 3rd bearing 17 and the 4th bearing 18 respectively, the shock and vibration produced when gear transmission still can be avoided to engage and noise, improve the working life of gear-driven reliability and gear.
More preferably, during original state, bottom gear external splines and top gear external splines are all between I grade of bottom gear driving gear 12 and I grade of top gear driving gear 14, when flip sleeve 40 is towards I grade of bottom gear driving gear 12 (upwards) slippage, bottom gear external splines matches with bottom gear internal spline; Otherwise when flip sleeve 40 is towards I grade of top gear driving gear 14 (downwards) slippage, top gear external splines matches with top gear internal spline.The sliding stroke of flip sleeve 40 can be reduced like this, improve the transmission efficiency between parts, thus improve the working efficiency of whole speed reducer.And this arrangement compact structure, does not need to increase exceptional space, meets the little and lightweight requirement of top-drive drilling volume.
As the enforceable mode of one, input shaft 10 is motor reel, and namely input shaft 10 is the output shaft of motor 60.Gear also comprises the oil hydraulic cylinder 42 of the bottom being placed in casing, and oil hydraulic cylinder 42 is connected with flip sleeve 40 and drives flip sleeve 40 along the sliding motion up and down of input shaft 10.More preferably, oil hydraulic cylinder 42 is positioned at the below of I grade of top gear driving gear 14.
Further, input shaft 10, jack shaft 20, output shaft 30 are parallel to each other, and are vertically arranged in casing.Vertical arrangement meets the needs of top drive drilling.The lower end of output shaft 30 connects the drilling rod 70 being used for drilling well.
More preferably, the I grade of bottom gear driving gear used in the present invention, 12, I grade of top gear driving gear, 14, I grade of bottom gear driven gear, 22, I grade of top gear driven gear, 24, II grade of driving gear 26 and II grade of driven gear 36 are helical gear.Helical gear, compared with spur gear, has that bearing capacity is strong, smooth running and an advantage such as noise is low, can be applicable to high rotating speed and export.
Further, the reduction speed ratio of I grade of bootom gear pair is 2 ~ 3 times of the reduction speed ratio of I grade of high speed gear's pair.I grade of bottom gear driven gear 22 is positioned at the top of I grade of top gear driven gear 24, size for I grade of top gear driven gear 24 of high-speed drive is relatively little, I grade of top gear driven gear 24 is positioned at the bottom of casing, is conducive to reserving the space arranging gear in the bottom of casing.
Output shaft 30 is set with main bearing 32 and hold down bearing 31.Main bearing 32 is positioned at the below of II grade of driven gear 36, and hold down bearing 31 is positioned at the top of II grade of driven gear 36.The setting of main bearing 32 and hold down bearing 31, ensure that output shaft 30 can stably Driving Torque, drilling rod 70 stable working.More preferably, alignment bearing 33 is also set in the below of main bearing 32.The bearing of output shaft 30 and upper setting thereof determines the whole height of two grades of gear reduction boxs for top-drive drilling, input mechanism and intermediate transfer mechanism arrange by foregoing mode, ensure that input mechanism and intermediate transfer mechanism can not exceed whole height, size for two grades of gear reduction boxs of top-drive drilling can not be excessive, can be adapted to the demand of top drive drilling.
More preferably, in all component in inside, the main bearing 32 that boundary dimension is very large is positioned at the bottom of casing.Meanwhile, in the intermediate transfer mechanism adjacent with output shaft 30, I of top gear less for size grade of top gear driven gear 24 is placed on the bottom of casing, enough spaces can also be ensured for the main bearing 32 that radial dimension is very large.
As the enforceable mode of one, on input shaft 10, set gradually clutch shaft bearing 15, second bearing 16, the 3rd bearing 17 and the 4th bearing 18 from top to bottom.I grade of bottom gear driving gear 12 is between clutch shaft bearing 15 and the second bearing 16, and clutch shaft bearing 15 and the second bearing 16 are for bearing axial force and the radial force of I grade of bottom gear driving gear 12; I grade of top gear driving gear 14 is between the 3rd bearing 17 and the 4th bearing 18, and the 3rd bearing 17 and the 4th bearing 18 are for bearing axial force and the radial force of I grade of top gear driving gear 14.Adopt clutch shaft bearing 15, second bearing 16, the 3rd bearing 17 and the 4th bearing 18, avoid gear transmission to produce obvious shock and vibration and noise when engaging, thus guarantee operate reliable and long service life.
More preferably, the distance between the upper-end surface of the second bearing 16 and the lower end surface of the 3rd bearing 17 equals the height of II grade of driving gear 26, and the position of the second bearing 16 and the 3rd bearing 17 efficiently utilizes the space between gear, does not need additionally to increase space.Two grades of gear reduction boxs of top-drive drilling of the present invention compared with existing one grade of conventional gear reduction box, the quantity showed increased of component, structure is more complicated, but also must guarantee the reliable and long service life of running; Because the physical dimension of top-drive drilling has strict demand, two grades of gear reduction boxs of the present invention, compared with one grade of gear reduction box, do not allow to increase size.
The present invention utilizes the reasonable Arrangement of each gear in intermediate transfer mechanism, make the second bearing 16 consistent with the width (axial height) of II grade of driving gear 26 with the axial height occupied by the 3rd bearing 17, even if add the secondary and corresponding bearing of I grade of high speed gear and gear, on the basis of existing one grade of gear reduction box, do not increase integrally-built axial height and horizontal width, meet the demand of top-drive drilling compact structure yet.
Further, casing comprises lower box 52, upper box lid 54 and the bearing support 56 with upper shed; Upper box lid 54 buckle closure is in the upper shed of lower box 52, and I grade of high speed gear's pair is placed in lower box 52.Second bearing 16, the 3rd bearing 17 are all connected with bearing support 56 is detachable, and bearing support 56 is connected with lower box 52 is detachable, and in the present embodiment, bearing support 56 is installed on the sidewall of lower box 52 by bolt 57, and bolt 57 is through the sidewall of lower box 52.More preferably, clutch shaft bearing 15 is arranged in upper box lid 54, and the 4th bearing 18 is arranged in lower box 52.
In prior art, if the bottom half of the speed reducer of top-drive drilling is divided into two-part, then multiple link is used two-part of bottom half to be assembled into one, but during due to real work, the load promoting drilling rod 70 is the bottom being acted on casing by output shaft 30 and the main bearing 32 be arranged on output shaft 30, remakes the drop handle on wall box.Calculate by analysis, very large owing to bearing thrust load, the intensity of bottom half link is far from being enough; Two grades of gear reduction boxs for top-drive drilling of the present invention, lower box 52 is as a whole.When needing dismounting, upper box lid 54 is opened, demounting bolt 57, take off bearing support 56, thus dismounting input mechanism and intermediate transfer mechanism.Lower box 52 for load-bearing is monolithic construction, can bear the thrust load of maximum drilling rod 70, and easy assembly and disassembly.That is, the present invention without separating in two-part situation in the bottom of casing, not only achieves two grades of speed changes, and is convenient to the assembly and disassembly of each component.
As the enforceable mode of one, refer to shown in Fig. 1, the quantity of input mechanism, intermediate transfer mechanism, gear and output mechanism is one.
As the enforceable mode of another kind, refer to shown in Fig. 2, the quantity of input mechanism, gear and intermediate transfer mechanism is two, and the quantity of output mechanism is one, and input mechanism, gear, intermediate transfer mechanism are symmetrically distributed in the both sides of output shaft 30 with drawing near respectively.When requiring Driving Torque larger, the input mechanism using two covers symmetrical, gear and intermediate transfer mechanism; Simultaneously can ensure that two grades of gear reduction boxs for top-drive drilling can not be laid particular stress on, the radial dimension of gear can not be excessive and axial dimension is too high.Usually, for the deep-well of the degree of depth more than 4000m ~ 5000m, two grades of gear reduction boxs for top-drive drilling of two cover input mechanisms, gear and intermediate transfer mechanism need be used, coordinate the drilling well of two motor 60.
Figure 2 shows that DQ70 top-drive drilling two grades of gear reduction boxs, comprise two input mechanisms of distribution left and right, Liang Ge intermediate transfer mechanism, two gears, an output mechanism and casings.When drilling depth reaches 7000m, the ac variable-frequency electric motor being equipped with two cover 400HP could meet the needs (according to the ac variable-frequency electric motor of a 800HP, top-drive device will be caused seriously to lay particular stress on) of drilling well.
The rotating speed of ac variable-frequency electric motor is 0 ~ 2400r/min: when rotating speed is within the scope of 0 ~ 1200r/min, and torque is nominal torque, and does not change with output speed change; When rotating speed is very low, the nominal torque of 2 times in the short time, can be obtained, meet requirement that is upper, shackle; When rotating speed is from 1200r/min ~ 2400r/min scope, Driving Torque reduces with the increase of output speed, maintains output power constant.
Use bottom gear: first motor 60 stops operating, and the oil hydraulic cylinder 42 of gear promotes flip sleeve 40 and moves up, and the involute outer spline of the outer wall epimere of flip sleeve 40 engages with the involute inner spline on I grade of bottom gear driving gear 12 center bore inner wall.Actuating motor 60, drilling rod 70 is driven to rotate by input shaft 10, flip sleeve 40, I grade of bootom gear pair, jack shaft 20, II grade of driving gear 26 and II grade of driven gear 36 and output shaft 30, from input shaft 10 to the two-stage gear reduction ratio of output shaft 30 be 10.5, now the speed range of drilling rod 70 is 0 ~ 228r/min, realizes bottom gear drilling well.
Use top gear; First motor 60 stops operating, and the oil hydraulic cylinder 42 of gear promotes flip sleeve 40 and moves down, and the involute outer spline of the outside hypomere of flip sleeve 40 engages with the involute inner spline on I grade of top gear driving gear 14 center bore inner wall.Actuating motor 60, by input shaft 10, flip sleeve 40, I grade of high speed gear's pair, jack shaft 20, II grade of driving gear 26 and II grade of driven gear 36, and output shaft 30 drives drilling rod 70 to rotate, from input shaft 10 to the two-stage gear reduction ratio of output shaft 30 be 4, now the speed range of drilling rod 70 is 0 ~ 600r/min, realizes the rapid drilling of PDC drill bit.
Above-described specific embodiment, has carried out further detailed description to object of the present invention, technological scheme and beneficial effect, should be appreciated that and the foregoing is only specific embodiments of the invention, the protection domain be not intended to limit the present invention.Particularly point out, to those skilled in the art, within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (11)

1. two grades of gear reduction boxs for top-drive drilling, comprise casing, it is characterized in that: described two grades of gear reduction boxs for top-drive drilling also comprise the input mechanism be arranged in described casing, intermediate transfer mechanism, output mechanism and gear;
Described input mechanism, comprises input shaft and is enclosed within I grade of bottom gear driving gear and I grade of top gear driving gear of described input shaft periphery;
Described intermediate transfer mechanism, comprise jack shaft and be sleeved on I grade of bottom gear driven gear on described jack shaft, I grade of top gear driven gear and II grade of driving gear, described I grade of bottom gear driven gear is meshed with described I grade of bottom gear driving gear, form I grade of bootom gear pair, described I grade of top gear driven gear is meshed with described I grade of top gear driving gear, forms I grade of high speed gear's pair;
Described output mechanism, comprises output shaft and is sleeved on II grade of driven gear on described output shaft; Described II grade of driven gear is meshed with described II grade of driving gear;
Described gear, comprise the flip sleeve be sleeved on described input shaft, described flip sleeve is placed between the center bore inner wall of described input shaft periphery and described I grade of bottom gear driving gear and the center bore inner wall of described I grade of top gear driving gear, described flip sleeve is along described input shaft slippage, match with the center bore inner wall of described I grade of bottom gear driving gear and the center bore inner wall of described I grade of top gear driving gear respectively, and drive described I grade of bootom gear secondary and described I grade of high speed gear pair to rotate respectively.
2. two grades of gear reduction boxs for top-drive drilling according to claim 1, is characterized in that: the periphery of described flip sleeve is arranged bottom gear external splines and top gear external splines; On the center bore inner wall of described I grade of bottom gear driving gear and on the center bore inner wall of described I grade of top gear driving gear, bottom gear internal spline and top gear internal spline are set respectively;
Described bottom gear external splines matches with described bottom gear internal spline, drives described I grade of bootom gear secondary motion, now described I grade of high speed gear pair idle running; Described top gear external splines matches with described top gear internal spline, drives described I grade of high speed gear's secondary motion, now described I grade of bootom gear pair idle running.
3. two grades of gear reduction boxs for top-drive drilling according to claim 1, it is characterized in that: described input shaft is motor reel, described gear also comprises the oil hydraulic cylinder being placed in described bottom half, and described oil hydraulic cylinder is connected with described flip sleeve and drives the sliding motion of described flip sleeve.
4. two grades of gear reduction boxs for top-drive drilling according to any one of claim 1 to 3, is characterized in that: described input shaft, described jack shaft and described output shaft are parallel to each other, and are vertically arranged in described casing.
5. two grades of gear reduction boxs for top-drive drilling according to claim 4, is characterized in that: the reduction speed ratio of described I grade of bootom gear pair is 2 ~ 3 times of the reduction speed ratio of described I grade of high speed gear's pair; Described I grade of bottom gear driven gear is positioned at the top of described I grade of top gear driven gear, and described II grade of driving gear is between described I grade of bottom gear driven gear and described I grade of top gear driven gear;
Described output shaft is set with described main bearing and hold down bearing, and described main bearing is positioned at the below of described II grade of driven gear, and described hold down bearing is positioned at the top of described II grade of driven gear.
6. two grades of gear reduction boxs for top-drive drilling according to claim 5, is characterized in that: on described input shaft, set gradually clutch shaft bearing, the second bearing, the 3rd bearing and the 4th bearing from top to bottom; Described I grade of bottom gear driving gear is between described clutch shaft bearing and described second bearing, and described I grade of top gear driving gear is between described 3rd bearing and described 4th bearing.
7. two grades of gear reduction boxs for top-drive drilling according to claim 6, is characterized in that: described casing comprises lower box, upper box lid and the bearing support with upper shed; Described upper box lid buckle closure is in the upper shed of described lower box, and described I grade of high speed gear's pair is placed in described lower box; Described second bearing, described 3rd bearing are all connected with described bearing support is detachable, and described bearing support is connected with described lower box is detachable, and described clutch shaft bearing is connected with described upper box lid, and described 4th bearing is connected with described lower box.
8. two grades of gear reduction boxs for top-drive drilling according to claim 1, is characterized in that: pass through spline fitted between described flip sleeve and described input shaft.
9. two grades of gear reduction boxs for top-drive drilling according to claim 1, is characterized in that: the quantity of described input mechanism, described intermediate transfer mechanism, described gear and described output mechanism is one.
10. two grades of gear reduction boxs for top-drive drilling according to claim 1, it is characterized in that: the quantity of described input mechanism, described gear and described intermediate transfer mechanism is two, the quantity of described output mechanism is one, and described input mechanism, described gear, described intermediate transfer mechanism are symmetrically distributed in the both sides of described output shaft with drawing near respectively.
11. two grades of gear reduction boxs for top-drive drilling according to claim 1, is characterized in that: described I grade of bottom gear driving gear, described I grade of top gear driving gear, described I grade of bottom gear driven gear, described I grade of top gear driven gear, described II grade of driving gear and described II grade of driven gear are helical gear.
CN201510032835.XA 2015-01-22 2015-01-22 Two-gear gear speed reducing box used for top driving well drilling device Pending CN104595423A (en)

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0285385B1 (en) * 1987-04-02 1993-06-02 W-N Apache Corporation Top head drive assembly for earth drilling machine and components thereof
CN2738460Y (en) * 2004-11-10 2005-11-02 北京普拉奥科技有限公司 Electric machine of top drivin well drilling apparatus for petroleum drilling
CN201078188Y (en) * 2007-09-12 2008-06-25 天津瑞灵石油设备有限公司 Mechanical reduction gear of drill top drive
CN201738806U (en) * 2010-05-20 2011-02-09 四川宏华石油设备有限公司 Top driving gear speed reducing device of drilling machine
CN202415443U (en) * 2012-01-10 2012-09-05 洛阳涧光石化设备有限公司 Drill rod top drive mechanism
CN202719084U (en) * 2012-07-04 2013-02-06 徐州良羽科技有限公司 Final transmission reduction box for high-horsepower tractor
CN102979862A (en) * 2012-11-23 2013-03-20 武汉理工通宇新源动力有限公司 Two speed automatic transmission
CN103185133A (en) * 2013-03-08 2013-07-03 韦瑞林 Method for changing speeds by sliding gear shifting of internal key and external tooth clutch fork
CN204186890U (en) * 2014-09-19 2015-03-04 北京石油机械厂 A kind of top-drive drilling gear reduction box

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0285385B1 (en) * 1987-04-02 1993-06-02 W-N Apache Corporation Top head drive assembly for earth drilling machine and components thereof
CN2738460Y (en) * 2004-11-10 2005-11-02 北京普拉奥科技有限公司 Electric machine of top drivin well drilling apparatus for petroleum drilling
CN201078188Y (en) * 2007-09-12 2008-06-25 天津瑞灵石油设备有限公司 Mechanical reduction gear of drill top drive
CN201738806U (en) * 2010-05-20 2011-02-09 四川宏华石油设备有限公司 Top driving gear speed reducing device of drilling machine
CN202415443U (en) * 2012-01-10 2012-09-05 洛阳涧光石化设备有限公司 Drill rod top drive mechanism
CN202719084U (en) * 2012-07-04 2013-02-06 徐州良羽科技有限公司 Final transmission reduction box for high-horsepower tractor
CN102979862A (en) * 2012-11-23 2013-03-20 武汉理工通宇新源动力有限公司 Two speed automatic transmission
CN103185133A (en) * 2013-03-08 2013-07-03 韦瑞林 Method for changing speeds by sliding gear shifting of internal key and external tooth clutch fork
CN204186890U (en) * 2014-09-19 2015-03-04 北京石油机械厂 A kind of top-drive drilling gear reduction box

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