CN102536113B - Underground electric drill device and method capable of reducing torque borne by drill stem - Google Patents
Underground electric drill device and method capable of reducing torque borne by drill stem Download PDFInfo
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- CN102536113B CN102536113B CN201210052715.2A CN201210052715A CN102536113B CN 102536113 B CN102536113 B CN 102536113B CN 201210052715 A CN201210052715 A CN 201210052715A CN 102536113 B CN102536113 B CN 102536113B
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Abstract
The invention provides an underground electric drill device and method capable of reducing the torque borne by a drill stem. The underground electric drill device is mounted between a drill collar and a drill bit and comprises two parts, namely a fixed power short circuit and a rotary rock breaking short circuit, wherein the upper end of the fixed power short circuit is connected with the drill collar; and two motors are symmetrically mounted on a metal cylindrical wall of the fixed power short circuit and are respectively connected with a conical gear. The lower end of the rotary rock breaking short circuit is connected with the drill bit; and gear teeth are arranged at the upper end of the rotary rock breaking short circuit. The lower end of the fixed power short circuit is connected with the upper end of the rotary rock breaking short circuit through a bearing and then two conical gears on the fixed power short circuit are simultaneously meshed with the gear teeth at the upper end of the rotary rock breaking short circuit; and the fixed power short circuit and the rotary rock breaking short circuit can relatively rotate on the axis extension line. According to the device and the method, the torque borne by the drill stem in the drilling process can be greatly reduced, the safety of drilling operation is enhanced, the service life of the drill stem is prolonged, and the exploration expenses of oil and gas fields are reduced; and the device and the method can be suitable for drilling deep wells and ultra-deep wells of oil and natural gas.
Description
Technical field
The present invention relates to two driving wheel conical gears, be combined as method for designing and the device that power transmission medium reduces a kind of downhole electric drilling tool of the suffered moment of torsion of drill string in oil, gas drilling process.
Background technology
Distortion sign when circular shaft reverses is the relative rotation of two cross section spaced winding axles, and this is angle of torsion namely.Design formulas is as follows:
Wherein:
the relative rotation being coiled between two cross sections of-circular shaft;
Moment of torsion between T-two sections;
Distance between l-two cross section;
I
p-second polar moment of area, and have for circular shaft:
d is diameter of round spindle.
By formula (1), can be found out, as T, G, I
pone regularly, the relative rotation being coiled between two cross sections of circular shaft
be directly proportional to the length l of circular shaft.
By formula (1), can be found out, in traditional rotary drilling process, because the length of drill string is very long, the moment of torsion that well head and shaft bottom produce causes very large torsional deflection to drill string, and produce spin friction between drilling rod and the borehole wall, this is very large to the infringement of drilling rod, the cost of making drilling rod is also very high.
Underground power drilling prodigiosin reduces the torsional deflection of drill string in drilling process, and in existing mud motor, and the unique advantage that electric rotating tool has more compared with turbodrill and helicoid hydraulic motor is:
1, energy does not rely on flowing of drilling fluid from ground to the transmission of drill bit;
2, can use different drilling fluid media;
3, electric energy can facilitate, be converted into efficiently the energy of other pattern;
4, by boosted voltage, the energy loss in transmitting procedure can be reduced, therefore constant high power can be maintained;
5, use electrodrill, the interrelated data of Rock in Well performance can be explained by the service performance of drill bit, in drilling process, the change of the drill bit moment of resistance can be reacted directly on the electric current and power of electric rotating tool motor, can control drilling process on ground accordingly, allow to use automatic technology and telecontrol engineering, realized the information management function in drilling process.
Existing electrodrill still has many deficiencies, as poor in reliability, after armature winding lost efficacy, repairs difficulty.Particularly the extensional vibration of tricone bit is severe, and the operating mode of electrodrill is severe.
Because existing electrodrill is in rock break-off process, the suffered moment of resistance in drill bit and rock contact position is in the vertical direction, still can on a part of drill string, produce reaction torque, therefore still has part drill string can bear certain moment of torsion, produces torsional deflection.
Summary of the invention
The object of this invention is to provide a kind of method and device that reduces the suffered moment of torsion of drill string in drilling process, the method and device utilize two driving wheel conical gear combinations as power transmission medium, can offset at downhole drill bit place most moment of torsion.
For achieving the above object, the present invention by the following technical solutions: between drill collar and drill bit, apparatus of the present invention are installed, apparatus of the present invention consist of stationary power short circuit and broken rock short circuit two parts of rotation.Stationary power short circuit upper end connects with drill collar by box thread, on the metal barrel of stationary power short circuit, symmetry is equipped with two motors, the bottom head covers of two motors is relative, rotor coaxial and rotating shaft are in the horizontal direction, two motors connect with a conical gear separately, in power input process, two motors drive the conical gear that connected separately to rotate simultaneously, and the direction of rotation of two conical gears is contrary, the suffered moment of torsion of two motors equal and opposite in direction in the horizontal direction thus, opposite direction, two moments of torsion are cancelled out each other.The broken rock short circuit of rotation lower end connects with drill bit by box thread, the upper end of the broken rock short circuit of rotation has the gear teeth, and these gear teeth design processing on taper seat, the gear teeth of similar conical gear, these gear teeth for stationary power short circuit on the engagement of two conical gears.Stationary power short circuit lower end connects by bearing with the broken rock short circuit of rotation upper end, after connection, the broken rock short circuit of stationary power short circuit and rotation is coaxial, and two conical gears on stationary power short circuit simultaneously and the gear teeth meshing of the broken rock short circuit of rotation upper end, the broken rock short circuit of stationary power short circuit and rotation can prolong on axis direction and relatively rotates.
The concrete grammar of stationary power short circuit input power and offset torque is: broken rock power is provided by two motors, and two motors are carried electric current by ground power supply by the wire being fixed on drilling rod.Two motor symmetries are arranged on the metal barrel of stationary power short circuit, and the bottom head covers of two motors is relative, and rotor coaxial and rotating shaft are in the horizontal direction.When two such mounting meanss of motor have guaranteed that two motors pass into same direction current rotation, because the bottom head covers of two motors is relative, the rotor of two motors rotation direction is in the horizontal direction contrary, for example: from the right side, turn left and look, if the rotor of a motor is toward clockwise direction rotation, the rotor of another motor must be toward counterclockwise rotation.Thus, the moment of torsion that two motors bear is separately all on a horizontal linear, and equal and opposite in direction, and opposite direction, can cancel out each other.Two motors connect with a conical gear separately, in power input process, two motors drive the conical gear that connected separately to rotate simultaneously, and the direction of rotation of two conical gears is contrary, the moment of torsion that two motors bear is thus equal and opposite in direction in the horizontal direction, opposite direction, two moments of torsion are cancelled out each other.
The broken rock short circuit of rotation drives the concrete grammar of the broken rock of bit to be: the upper end of the broken rock short circuit of rotation has the gear teeth, and these gear teeth design processing on taper seat, the gear teeth of similar conical gear, these gear teeth for stationary power short circuit on the engagement of two conical gears.The broken rock short circuit of rotation upper end connects with stationary power short circuit by bearing, after connection, the broken rock short circuit of stationary power short circuit and rotation is coaxial, and two conical gear engagements on the gear teeth of the broken rock short circuit of rotation upper end and stationary power short circuit, stationary power short circuit can prolong on axis direction and relatively rotate with the broken rock short circuit of rotation.When two conical gears of stationary power short circuit rotate, two conical gears are driving wheels, the broken rock short circuit of rotation is driven pulley, two coefficient final effects of conical gear are that the broken rock short circuit of driven rotary is toward a direction rotation, in the horizontal direction, the direction of rotation in the vertical direction of rock short circuit is broken in rotation to the rotation direction of two conical gears.The broken rock short circuit of rotation lower end connects with drill bit by box thread, can drive bit to break rock.
Two motors are high-power, high moment of torsion alternating current generator, guarantee broken rock required drive.
The making material of stationary power short circuit and the broken rock short circuit of rotation and two conical gears is high-strength metal material, guarantee that two motors are on the metal barrel of stationary power short circuit in offset torque process, the each side intensity of stationary power short circuit metal barrel can meet the demands, and conical gear is in the process of the broken rock short circuit transfer motion power of rotation, the intensity at each gear teeth meshing place can meet the demands.
On stationary power short circuit top, have a umbrella shape protection structure, the larger drilling cuttings producing when preventing brokenly rock causes blocked portion or other destruction to conical gear.
The concrete size of each part of apparatus of the present invention and parameter should be according to intending drilling well eye size, bore meeting lithology, power of motor, and the parameters such as motor maximum torque design.
Advantage of the present invention is: significantly reduce the moment of torsion that in drilling process, drill string bears, reduced the requirement to drilling rod torsional strength, reduced cost on making drilling rod material requested!
Accompanying drawing explanation
Fig. 1 is the front view (analysing and observe) of the conical gear engagement figure that is widely used now.
Fig. 2 is the right view of Fig. 1.
Fig. 3 is the engagement figure of a kind of pair of driving wheel conical gear combining structure, is cardinal principle figure of the present invention.
Fig. 4 is the front view (analysing and observe) of the structural representation of stationary power short circuit.
Fig. 5 is the right view of Fig. 4.
Fig. 6 is the front view (analysing and observe) of the structural representation of the broken rock short circuit of rotation.
Fig. 7 is the right view of Fig. 6.
Fig. 8 is the front view (analysing and observe) that the engagement figure of rock short circuit is broken in single conical gear and rotation.
Fig. 9 is the right view of Fig. 8.
Figure 10 is the front view (analysing and observe) of assembly structure schematic diagram of the present invention.
Figure 11 is the right view of Figure 10.
The specific embodiment
Below in conjunction with accompanying drawing, describe the present invention.
As shown in Figure 1 and Figure 2, conical gear combination is mainly used in the transmission between two concurrent aceses, and left conical gear 1 is driving wheel, and lower conical gear 2 is driven pulley.If a right conical gear 3 is installed again as driving wheel on the right of Fig. 1 structure, form two driving wheel conical gear combining structures as shown in Figure 3.
As shown in Figure 3, in two driving wheel conical gear combining structures, left conical gear 1 and right conical gear 3 are all driving wheel, lower conical gear 2 is driven pulley, in the horizontal direction, and the direction of rotation of left conical gear 1 and right conical gear 3 is contrary for the axis direction of left conical gear 1 and right conical gear 3 rotations.The axis direction in the vertical direction of lower conical gear 2 rotations.For example: from the right side, to the left right conical gear 3 is to turn clockwise, from the right side, to the left left conical gear 1 is rotated counterclockwise, and sees from top to bottom that lower conical gear 2 is to turn clockwise.Thus, the moment of torsion that left conical gear 1 and right conical gear 3 bear is equal and opposite in direction in the horizontal direction, and opposite direction can be cancelled out each other.
The structural representation of stationary power short circuit 17 is as shown in Figure 4, Figure 5 provided with motor M 1 and motor M 2 on the metal barrel of stationary power short circuit 17, and motor M 1 connects conical gear 1, and motor M 2 connects conical gear 25.In this structure, conical gear 1 is equivalent to the left conical gear 1 in Fig. 3 structure, and conical gear 25 is equivalent to the right conical gear 3 in Fig. 3 structure.Stationary power short circuit 17 upper ends connect with drill collar by box thread 8.7 pairs of conical gears 1 of beveled structure and conical gear 25 shield, the blocked portion that the larger drilling cuttings producing while preventing well drilling and rock crushing causes conical gear or other infringement.Crescent structure 9, for drilling fluid is successfully flow into the broken rock short circuit 18 of rotation from 17 transition of stationary power short circuit, can prevent that drilling fluid from flowing in the connection gap of stationary power short circuit 17 and the broken rock short circuit 18 of rotation.
The structural representation of the broken rock short circuit 18 of rotation as shown in Figure 6, Figure 7, the upper end of the broken rock short circuit 18 of rotation has the gear teeth 6, and the gear teeth 6 designs processing on taper seat, and the gear teeth 6 are similar to the gear teeth that descend conical gear 2 in Fig. 1.The gear teeth 6 for stationary power short circuit 17 on conical gear 1 and conical gear 25 mesh simultaneously.The broken rock short circuit of rotation 18 lower ends connect with drill bit by box thread 10.
As shown in Figure 8, Figure 9, the gear teeth 6 engagements with conical gear 1 and the broken rock short circuit of rotation 18 upper ends, this structure is with regard to structure similar to Figure 1, and conical gear 1 is just equivalent to the left conical gear 1 in Fig. 1 structure, and the broken rock short circuit 18 of rotation is just equivalent to the lower conical gear 2 in Fig. 1 structure.
As Figure 10, shown in Figure 11, by stationary power short circuit 17 and broken rock short circuit 18 assemblings of rotation, the power transmission principle of total is two driving wheel conical gear combining structures as shown in Figure 3 just, conical gear 1 is just equivalent to the left conical gear 1 in Fig. 3 structure, conical gear 25 is just equivalent to the right conical gear 3 in Fig. 3 structure, the broken rock short circuit 18 of rotation is just equivalent to the lower conical gear 2 in Fig. 3, conical gear 1 and conical gear 25 mesh with the gear teeth 6 of the broken rock short circuit of rotation 18 upper ends simultaneously, between the broken rock short circuit 18 of stationary power short circuit 17 and rotation, by bearing, connect, wherein: bearing 1, bearing 2 12, bearing 3 13, bearing 4 14 and bearing 5 15 are all deep groove ball bearings, the effect of these five bearings is to guarantee that stationary power short circuit 17 and the broken rock short circuit 18 of rotation can coaxially relatively rotate by the vertical direction.Bearing 16 is thrust ball bearings, and its effect is for bearing the pressure of the drill on vertical direction, prevents the pressure of the drill to the damage of five deep groove ball bearings above and prevents the damage that the pressure of the drill causes conical gear 1, conical gear 25 and the gear teeth 6 engagement places.Total connects with drill collar by box thread 8, by box thread 10, connects with drill bit.While creeping into, in motor M 1 and motor M 2, pass into same direction current, drive respectively conical gear 1 and conical gear 25 to rotate simultaneously, in the horizontal direction, the direction of rotation of conical gear 1 and conical gear 25 is contrary.For example: from the right side to the left, if conical gear 25 is to turn clockwise, conical gear 1 must be to be rotated counterclockwise, and consequent final effect is: see from top to bottom, the broken rock short circuit 18 of rotation is to turn clockwise.The moment of torsion that born separately due to motor M 1 in this process and motor M 2 is equal and opposite in direction, opposite direction in the horizontal direction, and both cancel out each other on the metal barrel of stationary power short circuit 17.Crescent structure 9, for blocking thrust ball bearing 16, prevents the infringement that drilling fluid causes it, and crescent structure 9 can make drilling fluid smooth transition from stationary power short circuit 17 flow in the broken rock short circuit 18 of rotation simultaneously.
In the present invention, mainly designed two driving wheel conical gear combining structures, the moment of torsion that two driving wheels in this structure bear is equal and opposite in direction, opposite direction, so can cancel out each other.The principle of two driving wheel conical gear combining structures is applied in this electrodrill, realized and significantly reduced the moment of torsion that in drilling process, drill string bears.
Claims (5)
1. the downhole electric drilling rig that can reduce the suffered moment of torsion of drill string, it is characterized in that: stationary power short circuit (17) is installed in drill collar lower end, the broken rock short circuit (18) of rotation is installed in drill bit upper end, and the broken rock short circuit (18) of stationary power short circuit (17) and rotation connects by deep groove ball bearing one (11), deep groove ball bearing two (12), deep groove ball bearing three (13), deep groove ball bearing four (14), deep groove ball bearing five (15) and bearing (16), on the metal barrel of stationary power short circuit (17), symmetry is equipped with two motor M 1 and M2, motor M 1 is relative with the bottom head covers of motor M 2, rotor coaxial and rotating shaft are in the horizontal direction, motor M 1 and conical gear one (4) connect, conical gear one (4) is for the gear teeth (6) engagement with the broken rock short circuit (18) of rotation upper end, motor M 2 and conical gear two (5) connect, conical gear two (5) is also for the gear teeth (6) engagement with the broken rock short circuit (18) of rotation upper end, in power input process, motor M 1 and motor M 2 drive the conical gear that connected separately to rotate simultaneously, on stationary power short circuit (17) top, have a umbrella shape protection structure (7), the larger drilling cuttings producing when preventing brokenly rock causes blocked portion or other destruction to conical gear one (4) and conical gear two (5), in stationary power short circuit (17) bottom, there is a crescent structure (9), be used for making drilling fluid successfully from stationary power short circuit (17) transition, to flow into the broken rock short circuit (18) of rotation, can prevent that drilling fluid from flowing in the connection gap of stationary power short circuit (17) and the broken rock short circuit (18) of rotation, stationary power short circuit (17) upper end connects with drill collar by box thread (8), and during broken rock, stationary power short circuit (17) drives conical gear one (4) and conical gear two (5) to provide power for rotating broken rock short circuit (18) by motor M 1 and motor M 2, the upper end of the broken rock short circuit (18) of rotation has the gear teeth (6), and the gear teeth (6) design processing on taper seat, the gear teeth of similar conical gear, the gear teeth (6) for stationary power short circuit (17) on conical gear one (4) and conical gear two (5) engagement, the broken rock short circuit (18) of rotation lower end connects with drill bit by box thread (10), and the transmission of power that stationary power short circuit (17) is provided is to drill bit, the broken rock short circuit (18) of stationary power short circuit (17) and rotation connects by deep groove ball bearing one (11), deep groove ball bearing two (12), deep groove ball bearing three (13), deep groove ball bearing four (14), deep groove ball bearing five (15) and bearing (16), wherein, deep groove ball bearing one (11), deep groove ball bearing two (12), deep groove ball bearing three (13), deep groove ball bearing four (14), deep groove ball bearing five (15) can coaxially relatively rotate by the vertical direction for guaranteeing the broken rock short circuit (18) of stationary power short circuit (17) and rotation, bearing (16) is for bearing the axial load on vertical direction, after connection, broken rock short circuit (18) in the vertical direction of stationary power short circuit (17) and rotation is coaxial, and conical gear one (4) and conical gear two (5) simultaneously and the gear teeth (6) engagement of the broken rock short circuit (18) of rotation upper end, stationary power short circuit (17) and rotation are broken rock short circuit (18) and can be prolonged on axis direction and relatively rotate.
2. a kind of downhole electric drilling rig that reduces the suffered moment of torsion of drill string according to claim 1, it is characterized in that: the broken rock short circuit (18) of rotation upper end has the gear teeth (6), and the gear teeth (6) design processing on taper seat, the gear teeth of similar conical gear, the gear teeth (6) mesh for while and conical gear one (4) and conical gear two (5) on stationary power short circuit (17), the broken rock short circuit (18) of rotation upper end is by deep groove ball bearing one (11), deep groove ball bearing two (12), deep groove ball bearing three (13), deep groove ball bearing four (14), deep groove ball bearing five (15) and bearing (16) connect with stationary power short circuit (17), after connection, the broken rock short circuit (18) of stationary power short circuit (17) and rotation is coaxial, and the gear teeth (6) while of the broken rock short circuit (18) of rotation upper end meshes with conical gear one (4) and conical gear two (5) on stationary power short circuit (17), stationary power short circuit (17) and the broken rock short circuit (18) of rotation can prolong on axis direction and relatively rotate, when conical gear one (4) and conical gear two (5) rotate simultaneously, conical gear one (4) and conical gear two (5) are driving wheels, the broken rock short circuit (18) of rotation is driven pulley, conical gear one (4) and conical gear two (5) coefficient final effects are that the broken rock short circuit (18) of driven rotary is toward a direction rotation, in the horizontal direction, the direction of rotation in the vertical direction of rock short circuit (18) is broken in rotation to the rotation direction of conical gear one (4) and conical gear two (5), the broken rock short circuit (18) of rotation lower end connects with drill bit by box thread (10), can drive bit to break rock.
3. a kind of downhole electric drilling rig that reduces the suffered moment of torsion of drill string according to claim 1, it is characterized in that: after described conical gear one (4), conical gear two (5) and the gear teeth (6) engagement, three forms a two driving wheel conical gear combining structure jointly.
4. a kind of downhole electric drilling rig that reduces the suffered moment of torsion of drill string according to claim 1, is characterized in that: bearing (16) is thrust ball bearing.
5. a kind of method that reduces the suffered moment of torsion of drill string of utilizing device as claimed in claim 1 to realize, it is characterized in that: broken rock power is provided by motor M 1 and motor M 2, motor M 1 and motor M 2 symmetries are arranged on the metal barrel of stationary power short circuit (17), motor M 1 is relative with the bottom head covers of motor M 2, and rotor coaxial and rotating shaft are in the horizontal direction; When such mounting means has guaranteed that motor M 1 and motor M 2 pass into same direction current rotation, because motor M 1 is relative with the bottom head covers of motor M 2, the rotor of motor M 1 and motor M 2 rotation direction is in the horizontal direction contrary, thus, the moment of torsion that motor M 1 and motor M 2 are born is separately all on a horizontal linear, and equal and opposite in direction, opposite direction, can cancel out each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210052715.2A CN102536113B (en) | 2012-03-02 | 2012-03-02 | Underground electric drill device and method capable of reducing torque borne by drill stem |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210052715.2A CN102536113B (en) | 2012-03-02 | 2012-03-02 | Underground electric drill device and method capable of reducing torque borne by drill stem |
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| Publication Number | Publication Date |
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| CN102536113A CN102536113A (en) | 2012-07-04 |
| CN102536113B true CN102536113B (en) | 2014-04-09 |
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| CN201210052715.2A Expired - Fee Related CN102536113B (en) | 2012-03-02 | 2012-03-02 | Underground electric drill device and method capable of reducing torque borne by drill stem |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103006289B (en) * | 2013-01-12 | 2014-08-13 | 青岛理工大学 | Axial force controllable surgical bone drill with abrasive grain bit |
| WO2016077976A1 (en) * | 2014-11-18 | 2016-05-26 | 史利利 | Household appliance and motor system |
| CN107215458B (en) * | 2017-06-21 | 2023-12-08 | 中电科芜湖钻石飞机制造有限公司 | Electric double coaxial tilting rotor craft |
| CN107140198B (en) * | 2017-06-21 | 2023-12-08 | 中电科芜湖钻石飞机制造有限公司 | Nacelle structure of double coaxial tilting rotor unmanned aerial vehicle |
| CN108005602A (en) * | 2017-12-13 | 2018-05-08 | 攀枝花市朵实机械制造有限公司 | Preventing sticking drilling rod protects structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6868906B1 (en) * | 1994-10-14 | 2005-03-22 | Weatherford/Lamb, Inc. | Closed-loop conveyance systems for well servicing |
| EP1620629B1 (en) * | 2003-04-25 | 2009-04-22 | Intersyn Technologies | System and method using a continuously variable transmission to control one or more system components |
| CN201013232Y (en) * | 2007-07-26 | 2008-01-30 | 胡长胜 | Drill-rod-free drilling tool |
| CN101215954A (en) * | 2008-01-09 | 2008-07-09 | 西南石油大学 | High sealing property screw drill driving-shaft assembly |
| CN101525979B (en) * | 2008-03-05 | 2013-04-24 | 普拉德研究及开发股份有限公司 | Device for eliminating net torque of bit and controlling bit walk |
| CN201276980Y (en) * | 2009-01-23 | 2009-07-22 | 中成新星油田工程技术服务股份有限公司 | Screw drill with replaceable transmission shaft coupling |
| CN102268962B (en) * | 2011-08-09 | 2013-07-24 | 西南石油大学 | Oil seal screw drilling tool transmission shaft assembly with pressure compensation function |
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