Turbine torsional impact generator
The present invention relates in oil and gas exploration and development process the instrument improving deep hard formation bit speed, specifically relate to a kind of turbine torsional impact generator.
Current, China's land oil-gas exploration and development presents from east to west and the trend developed to deep & ultra-deep well, and meanwhile, gas and oil in sea exploitation progressively turns to deep-sea by sea, beach with shallow sea.Along with oil-gas exploration is progressively to deep formation and the development of territory, deep-sea, drill-well operation faces the ground environment and a drilling process difficult problem that become increasingly complex, and exploration exploitation difficulty continues to increase.In the drilling process of deep & ultra-deep well, along with the increase of well depth, formation hardness and plasticity increase, and abrasiveness strengthens, and drillability is deteriorated, and lower drilling tool stick slip vibration is violent.The stick slip vibration phenomenon of drilling tool not only causes rate of penetration to reduce, and also may cause the generation of down-hole accident, have a strong impact on the carrying out of oil-gas exploration and development.
Torsional pulse drilling well is a kind of emerging efficient drilling technology, and it even suppresses the stick slip vibration of lower drilling tool to grow up based on slowing down just.Torsional pulse drilling well refers to that on the basis of conventional drilling, set up a torsional impact drilling tool above PDC drill bit turns round the drilling technology to impacting for providing high frequency periodically by a narrow margin to drill bit.Impactor impacts the periodical high-frequency that drill bit produces, and significantly can reduce or eliminate the stick slip vibration of PDC drill bit, while raising rate of penetration, can protect drill bit, extend bit life, reduce the number of times that makes a trip, effectively reduce drilling cost.
At present, although the torsion impact device of existence can realize the torsional pulse of high frequency, there is a lot of defect, such as, the design of (1) impact structure is unreasonable, causes single strike work little, and the impact secondary life-span is not high; (2) there is not energy-storage travelling wave tube, make to turn round that to rush capacity usage ratio lower; (3) existing torsion impact device self is without stabilizer; (4) turbo blade Profile Design is unreasonable, and drilling fluid energy transformation ratio is low, causes turning round that to rush tool work performance not good.
Summary of the invention
For above defect, the present invention devises a kind of turbine torsional impact generator.
The technology used in the present invention solution is:
A kind of turbine torsional impact generator, comprise crossover sub, shell, turbine, dead axle, drive sleeve, impact claw, impact frame, power transmission shaft and drill holder, shell upper end coupling adapter, shell lower end connects drill holder, and turbine rotor is fixed on dead axle, turbine stator is fixed on shell, dead axle and drive sleeve are by spline fitted, and drive sleeve is arranged on impacts frame upper end, impacts frame lower end and installs end cap, power transmission shaft is arranged on drive sleeve and end cap, and impact claw is arranged on and impacts on frame, dead axle lower end is provided with block plate, and dead axle is provided with side runner, and drilling fluid enters in shell through crossover sub, flow through turbine and arrive block plate, return then to dead axle side runner, converge to the sprue of dead axle, then enter power transmission shaft through drive sleeve, continue to flow into drill holder downwards, drilling fluid starts turbine, turbine rotor High Rotation Speed, drive dead axle High Rotation Speed, dead axle drives drive sleeve to rotate, drive sleeve offers U-shaped mouth, impact claw comprises square department, dog clutch portion and connecting portion, square department matches with U-shaped mouth, connecting portion is cylindrical, impact frame is provided with bar-shaped trough, the connecting portion of impact claw snaps in bar-shaped trough, impact claw can relative to impact frame small angle rotation, power transmission shaft is provided with the dog clutch groove matched with dog clutch portion, impact claw square department is stirred by U-shaped mouth when drive sleeve is rotated, drive impact claw and impact frame and rotate, the periodic impact transmission shaft of impact claw.
Preferably, uniform four stiff stability devices on side wall of outer shell, described stiff stability device is elongate helical blade type.
Preferably, described crossover sub one end is the pin thread connecting drill collar, and the other end is the pin thread of connected with outer casing; Shell upper end is the box of coupling adapter, and shell lower end is evenly equipped with the shell spline of four 45 degree, forms the shell spline of four 45 degree; Drill holder has the spline of four 40 degree be arranged around on drill holder end face, form the drill holder spline of four 50 degree, shell spline and drill holder spline form matched in clearance.
Preferably, described dead axle bottom is provided with shoulder, and side is provided with semicircle bar shaped boss, steel bushing is installed on top, and turbine rotor is by shoulder, boss and steel bushing location, and platen is arranged on steel bushing, the two is for being slidably connected, and end cap and dead axle are threaded connection and are fixed on dead axle by turbine rotor; Described turbine stator bottom is located by positioning sleeve, and locating collar seat is on block plate, and on the shoulder of block plate seat wall in the enclosure, turbine stator top is fixed on shell by platen and crossover sub.
Preferably, described outer casing inner wall offers groove, at groove internal fixtion pressure-loaded bearing, described impact frame end lid and drive axle seat are on pressure-loaded bearing.
Preferably, described power transmission shaft and drill holder are threaded connection, drill holder offers square trench, lay two anti-lost back-up rings of semi-circular shape in the trench, four screwed holes are offered in shell lower end circumference, in screwed hole, load anti-lost screw rod, anti-lost back-up ring and anti-lost screw rod are threaded connection.
Advantageous Effects of the present invention is:
(1) appropriate design of the present invention torsional pulse structure, under the prerequisite realizing large impact energy, namely energy-storage travelling wave tube impacts frame and the torque energy that turbine in two Secondary Shocks intervals produces can be stored, upper once impact time discharge completely, thus improve in interval and turn round the utilization rate of rushing energy;
(2) the present invention carries stabilizer in enclosure design, can also play anti-oblique effect, ensure wellbore quality while speed-raising is beaten soon;
(3) the present invention arranges easy-to-dismount anti-lost back-up ring and anti-lost screw rod in shell lower end, while power transmission shaft drill holder is threaded, plays dual fail-safe effect to drill holder, improves the safety of drilling well;
(4) favorable working performance of the present invention, energy transformation ratio is high, long service life.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and detailed description of the invention, the invention will be further described:
Fig. 1 is structural principle schematic diagram of the present invention;
Fig. 2 is the A-A view of Fig. 1;
Fig. 3 is the B-B view of Fig. 1;
Fig. 4 is the C-C view of Fig. 1;
Fig. 5 is the D-D view of Fig. 1;
Fig. 6 is the E-E view of Fig. 1;
Fig. 7 is external structure schematic diagram of the present invention;
Fig. 8 is the F-F view of Fig. 7;
Fig. 9 is the G-G view of Fig. 7;
Figure 10 is turbine stator blade profile figure;
Figure 11 is turbine rotor blade profile figure;
Figure 12 is the structural representation of drive sleeve;
Figure 13 is the structural representation of impact claw;
Figure 14 is the structural representation impacting frame;
Figure 15 is the structural representation of power transmission shaft.
In figure: 1-crossover sub, 2-shell, 3-turbine rotor, 4-turbine stator, 5-dead axle, 6-drive sleeve, 7-impact claw, 701-square department, 702-dog clutch portion, 703-connecting portion, 8-impacts frame, 801-bar-shaped trough, 9-power transmission shaft, 901-dog clutch groove, 902-transition portion, 10-drill holder, 11-shell spline, 12-drill holder spline, 13-steel bushing, 14-gland, 15-end cap, 16-positioning sleeve, 17-block plate, 18-platen, 19-dead axle side runner, 20-U shape mouth, 21-pressure-loaded bearing, the anti-lost back-up ring of 22-, the anti-lost screw rod of 22-, 24-stiff stability device.
Detailed description of the invention
By reference to the accompanying drawings, a kind of turbine torsional impact generator, forms primarily of crossover sub 1, shell 2, turbine rotor 3, turbine stator 4, dead axle 5, drive sleeve 6, impact claw 7, impact frame 8, power transmission shaft 9 and drill holder 10.
Crossover sub 1 one end is the pin thread connecting drill collar, and the other end is the pin thread of connected with outer casing 2.Shell 2 upper end is the box of coupling adapter, and shell 2 lower end is evenly equipped with the shell spline 11 of four 45 degree, forms the housing spline of four 45 degree.Drill holder 10 has the drill holder spline 12 of four 40 degree be arranged around on drill holder end face, form the drill holder spline of four 50 degree, shell spline 11 and drill holder spline form matched in clearance.
Turbine rotor 3 is fixed on dead axle 5, dead axle 5 bottom is provided with shoulder, side is provided with semicircle bar shaped boss, steel bushing 13 is installed on top, turbine rotor 3 is by shoulder, boss and steel bushing location, platen 18 is arranged on steel bushing, and the two is for being slidably connected, and end cap 15 and dead axle are threaded connection and are fixed on dead axle 5 by turbine rotor 3.
Turbine stator 4 is fixed on shell 2.Turbine stator 4 bottom is located by positioning sleeve 16, and positioning sleeve 16 is on block plate 17, and block plate 17 on the shoulder of shell 2, then is fixed on shell 2 by platen 18 and crossover sub 1.
Dead axle 5 and drive sleeve 6 are by spline fitted, and drive sleeve 6 is arranged on impacts frame 8 upper end, and impact frame 8 lower end and install end cap, power transmission shaft 9 is arranged on drive sleeve 6 and end cap, and impact claw 7 is arranged on and impacts on frame 8.Dead axle 5 lower end is provided with block plate 17, and block plate 17 central aperture plays the effect of righting positioning sleeve.Dead axle 5 is provided with side runner 19.Drilling fluid enters in shell 2 through crossover sub 1, flows through turbine and arrives block plate 17, return to dead axle side runner 19, converge to the sprue of dead axle, then enter power transmission shaft 9 through drive sleeve 6 then, continues to flow into drill holder 10 downwards.
Drilling fluid starts turbine, turbine rotor 3 High Rotation Speed, and drive dead axle 5 High Rotation Speed, dead axle 5 drives drive sleeve 6 to rotate.Drive sleeve 6 offers U-shaped mouth 21.Impact claw 7 comprises square department 701, dog clutch portion 702 and connecting portion 703, and square department 701 matches with U-shaped mouth 20, and connecting portion 703 is elliptical cylinder-shape.Impact frame 8 is provided with bar-shaped trough 801, and the connecting portion 703 of impact claw snaps in bar-shaped trough 801, and impact claw 7 can relative to impact frame 8 small angle rotation.Power transmission shaft 9 is provided with the dog clutch groove 901 matched with dog clutch portion 702, and power transmission shaft, when offering dog clutch groove, requires to consider manufacture craft, therefore, has one section of transition portion 902 to meet the path of cutter cutting in part processing and making process.Stir impact claw square department 701 by U-shaped mouth 21 when drive sleeve 6 is rotated, drive impact claw 7 and impact frame 8 and rotate, impact claw 7 is by the mating reaction periodic impact transmission shaft 9 of dog clutch portion 702 with dog clutch groove 901.
Shell 2 inwall offers groove, and at groove internal fixtion pressure-loaded bearing 21, described impact frame end lid and power transmission shaft 9 are on pressure-loaded bearing 21.Power transmission shaft 9 and drill holder 10 are threaded connection, drill holder 10 offers square trench, lay two anti-lost back-up rings 22 of semi-circular shape in the trench, four screwed holes are offered in shell lower end circumference, in screwed hole, load anti-lost screw rod 23, anti-lost back-up ring 22 and anti-lost screw rod 23 are threaded connection.Anti-lost back-up ring 22 and anti-lost screw rod 23 pairs of drill holders play dual fail-safe effect, improve the safety of drilling well.
Uniform four stiff stability devices 24 on shell 2 lateral wall, described stiff stability device 24 stretches along outer cover length direction, in elongate helical blade type, can also play anti-oblique effect while speed-raising is beaten soon, ensure wellbore quality.
The blade profile of above-mentioned turbine rotor 3 and turbine stator 4 adopts quintic algebra curve method to draw in conjunction with the parameter request calculation optimization of software for calculation and instrument demand, specifically as shown in Figure 10,11, this turbine rotor and turbine stator blade profile can make the transformation efficiency of energy promote further.
Below the course of work of the present invention is described:
Drill collar drives shell 2 to rotate, and shell 2 drives drill holder 10 by spline thus drives the continuous rotational shear formation rock of drill bit.Simultaneously, drilling fluid enters in turbine torsional impact generator shell through crossover sub 1, the runner flowed through on gland 14 enters turbine, start turbine, turbine rotor 3 High Rotation Speed, drive dead axle 5 High Rotation Speed, now drilling liquid flow arrives block plate 19 through turbine, drilling fluid returns to dead axle side runner 20, converge to the sprue of dead axle, enter drive sleeve 6 and continue to flow downward.Dead axle 5 drives drive sleeve 6 High Rotation Speed by spline, and drive sleeve 6 stirs impact claw 7, and impact claw 7 drives and impacts frame 8 High Rotation Speed, and in rotary course, impact claw 7 and drive sleeve 6 act on also constantly Ground shock waves power transmission shaft 9, form high-frequency percussion.Power transmission shaft 9 is by the high-frequency percussion energy transferring of acquisition on drill holder 10, and drill holder 10 drives drill bit pulsation Ground shock waves formation rock; Drilling fluid enters into power transmission shaft 9 through drive sleeve 6 simultaneously, and continuing to flow downward enters drill holder 10.
The part do not addressed in aforesaid way is taked or uses for reference prior art to realize.
It should be noted that, under the instruction of this manual, any equivalents done by those skilled in the art, or obvious variant, all should within protection scope of the present invention.