CN102242606A - Hydraulic pressurizer - Google Patents
Hydraulic pressurizer Download PDFInfo
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- CN102242606A CN102242606A CN2011101828650A CN201110182865A CN102242606A CN 102242606 A CN102242606 A CN 102242606A CN 2011101828650 A CN2011101828650 A CN 2011101828650A CN 201110182865 A CN201110182865 A CN 201110182865A CN 102242606 A CN102242606 A CN 102242606A
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Abstract
The invention relates to a hydraulic pressurizer, belonging to the technical field of slurry circulating equipment of bored wells. The pressurizer at least comprises an upper connector, a hydraulic pressurizing device, a torque transmission device and a bit pressure tracking early-alarming device that is connected with a drill bit. The hydraulic pressurizing device comprises a hydraulic cylinder, a hollow piston and a respirator; the torque transmission device comprises an external square shaft, an internal square sleeve, a retainer ring and a pressure balance mechanism; and the bit pressure tracking early-alarming device comprises a signal device, a seal cylinder, a central shaft, a seal mechanism and a liquid drainage mechanism. The pressurizer is connected between drilling tools. The bit pressure can be accurately applied to the drill bit by using the pressurizer. According to the pressurizer disclosed by the invention, pulse jet stream with sound harmonic resonance can be produced through a labial structure formed by a water course and a drill bit nozzle of the pressurizer, cavitation is induced in relatively static slurry, such that the bottom of a well produces transient low pressure to reduce 'hold-down effect' of a slurry liquid column. When the bit pressure is changed, the bit pressure tracking early-alarming device can send out a signal to indicate operation. The pressurizer has the capabilities of absorbing vibration of drilling tools and prolonging service life of the drill bit. Moreover, the pressurizer has the functions of inclining prevention, angle maintaining and speed acceleration.
Description
Technical field
The invention belongs to the circulating drilling equipment technical field of waterpower or mud.
Technical background
In the conventional drilling process, drill bit directly is connected the lower end of drilling tool, and the pressure of the drill is provided by the weight of drilling tool, and there are many drawbacks in this mode:
1, the pressure of the drill is difficult to guarantee, send the brill amount to be difficult for grasping; The pressure of the drill is little, and drilling speed is low; Big bit life and the drill tool life of influencing of the pressure of the drill;
2, in special formation creeps into, because factors such as stratum, well and operation can produce the bouncing of drilling tool vibration, focus has a strong impact on bit life and drill tool life from drill bit and drilling tool, has designed various dampers for this reason, damping effect is limited, can not satisfy field demand.
3, during straight well creeps into, be deviation control with drilling straight well, often adopt the method for hanging up and beating, not only drilling speed is low, and actual effect is low.
4, in horizontal well, the extended reach well drilling process,, can produce " false the pressure of the drill " phenomenon, be difficult to judge whether add required the pressure of the drill, the operation band is born the character of much blindness to drill bit owing to be subjected to the effect of borehole wall support and borehole wall frictional resistance.
5, in the slimhole drilling, because the drilling tool size is little, in light weight, poor rigidity be difficult to judge whether add required the pressure of the drill to drill bit, thereby drilling efficiency is low.
6, in the deep drilling, suffered mud buoyancy of drilling tool and borehole wall frictional resistance are big, and the pressure of the drill can not add to drill bit effectively, so drilling speed is low.
Above-mentioned drawback is the inevitable and insoluble again drawback of existing drilling technology, existing pressuring method and the pressure of the drill measurement indicating means only change, adopt content of the present invention, could be in the drilling process of various well types, add required the pressure of the drill to drill bit, avoid " false the pressure of the drill " phenomenon, indicate the drill-well operation personnel in time to send brill at any time.
Summary of the invention
The objective of the invention is to design a kind of drawback that can overcome existing drilling technology, make the drilling operator understand at any time downhole drill bit the pressure of the drill value, and can apply a kind of fluid power pressurizer of required the pressure of the drill to drill bit in good time.The present invention includes one or more fluid power water booster system, a torque transmission device and the pressure of the drill tracking and early warning device.Described fluid power water booster system comprises top connection, liquid cylinder, hollow piston, tube connector, breather; Top connection is connected with liquid cylinder by the drilling rod screw thread, and hollow piston realizes that by sealing ring and liquid cylinder movable sealing cooperates; Breather is installed on the cylindrical wall of liquid cylinder, and the lower end of liquid cylinder can be connected with another fluid power water booster system by the drilling rod screw thread, perhaps is connected with torque transmission device, in order to improve the fluid power pressurization value.Side's cover, outer square shaft, sealing ring, pressure balance mechanism, back-up ring were used to transmit drilling well moment of torsion broken formation rock in described torque transmission device comprised; Outer square shaft top is equipped with back-up ring, and its top is cylindrical shape, and pressure balance mechanism is installed, its middle part is that outer polygon-shaped and interior side's cover cooperates, and its bottom is connected with axis by drill rod thread, is one with axis perhaps, among the present invention, outer square shaft and axis are one; Pressure balance mechanism cooperates with the top circular hole face of interior side cover and the face of cylinder, the top formation movable sealing of outer square shaft respectively by sealing ring, is used for balance and relatively moves the volume-variation of generation because of outer square shaft and axis and sealing cylinder; The top of interior side cover is connected with the liquid cylinder of fluid power water booster system by the drilling rod screw thread, and its bottom is connected with the pressure of the drill tracking and early warning device by the drilling rod screw thread, and the endoporus top that interior side overlaps is interior circular hole shape, and the bottom is interior shape in many ways.Described the pressure of the drill tracking and early warning device comprises recoil simulator, sealing cylinder, axis, sealing mechanism, drainage mechanism; Axis is the cylinder of hollow, and the upper end of axis is connected with outer square shaft by the drilling rod screw thread, and axis of the present invention is an one with outer square shaft; The top of axis is cylinder, and sealing ring is installed, cooperate with the sealing cylinder, in the cylinder at axis middle part at least one recoil simulator is installed, the bottom of axis has the drilling rod screw thread to be connected with drilling tool, perhaps is connected with drill bit, is processed with the self-excited vibration chamber at the root of drilling rod screw thread, the endoporus that makes axis strengthens suddenly at place, self-excited vibration chamber; The sealing cylinder is a hollow cylindrical, the top inner hole surface cooperates the formation movable sealing with the sealing ring that is installed in axis, sealing ring is installed and is processed with the multiple tracks groove on the inner hole surface of middle part, constituting multistage movable sealing with axis bottom cylinder cooperates and multistage matched in clearance, bottom diameter of bore processing is bigger, in order to the steel-bonded carbide ring to be installed, the upper and lower end of sealing cylinder is connected with plug with interior side's cover respectively by the drilling rod screw thread; Recoil simulator is made up of the telltale hole on the axis, carbide alloy mouth, sealing ring, pressure cap, anti-loose spot; In order to the slush pump pressure signal to take place, follow the tracks of and indication bit pressure follow-up situation.
The main drawback of existing drilling technology is that the pressure of the drill value does not have authenticity and knowability, and this is the defective that existing drilling well pressuring method is difficult to overcome, and therefore, must improve existing drilling well pressuring method.The present invention is connected between drilling tool and the drill bit, when applying the pressure of the drill to drill bit, can drilling tracking the pressure of the drill value, when the pressure of the drill value has reduced, when perhaps the pressure of the drill is not added on the drill bit, recoil simulator stretches out the sealing mechanism of the pressure of the drill precaution device, enters drainage mechanism, has increased the mud outlet in the drilling tool, mud pressure reduces in the drilling tool, the slush pump output pressure on ground reduces, and indication the drilling operator in time send brill, perhaps takes measures to pressurize to drill bit.When the pressure of the drill added to drill bit, recoil simulator entered in the sealing mechanism of the pressure of the drill precaution device, and the carbide alloy mouth is sealed, and mud pressure returns to original value again, and the existing fluid power pressurization value of the pressure of the drill value of this moment has the gravimetric value of drill collar again.The invention solves in directional well, extended reach well, horizontal hole, be difficult to problem to drill bit pressurization and " false the pressure of the drill ", can also absorb simultaneously impact shock effectively from drilling tool, keep the required impact shock of drill bit broken formation rock, be existing damper institute can not compare (have the vibration that damper not only absorbs drilling tool now, and, reduced bit speed on the contrary) also having absorbed from effective vibration of drill bit.Therefore the present invention can improve bit speed more than 30%, and the application life that prolongs drill bit, drilling tool is more than 50%.
The present invention is simple to operate, and the operator utilizes the fluid power of slush pump to apply the pressure of the drill to drill bit, the pressure of the drill value stabilization, and can send brill at any time, follow the tracks of the pressure of the drill at any time.
The present invention operates accurately, and the operator utilizes the variation of slush pump pressure to forecast that in time the pressure of the drill value changes, and in time the early warning operator takes measures to apply the pressure of the drill.
Flexible operation of the present invention, use the present invention can be according to drillability and required the pressure of the drill value of boring formation rock, the number of increase and decrease fluid power pressurizer, mud pump delivery and pump pressure perhaps are set, make the fluid power pressurizer produce different end thrusts, apply different the pressure of the drill to drill bit, satisfy the drilling well needs of different well types, different well sections.
Dependable performance of the present invention uses the present invention not consume the slush pump water horse power, does not increase operation easier, has stablized the operating mode of the pressure of the drill and drilling tool on the contrary, reduces or avoids blindly operation, has reduced operating risk, has improved the reliability of operation.
In various well types, use the present invention, can not have a negative impact to the prior art equipment with to the borehole wall, with existing weaponry and equipment and existing drilling technology good matching is arranged, for example during circulating mud, drilling tool is lifted from the shaft bottom, a kind of fluid power water booster system is in the maximum tension state, in order to improve slush pump circulating mud discharge capacity, reduce the circulation pump pressure, a kind of fluid power water booster system provides a plurality of mud circulation passages, formed mud by of the outlet of drilling tool hydrophthalmia with bit port to bore hole annulus, and can the erosion borehole wall and drilling tool.
Description of drawings
Fig. 1 is a kind of structural representation of the present invention;
Fig. 2 is a kind of structural representation enlarged drawing of fluid power pressurizer;
Fig. 3 is a kind of structural representation enlarged drawing of the recoil simulator of the pressure of the drill tracking and early warning device;
Fig. 4 is the structural representation of torque transmission device and the pressure of the drill tracking and early warning device;
Fig. 5 is an axis structural representation enlarged drawing;
Fig. 6 is a back-up ring structural representation enlarged drawing;
Fig. 7 is a balanced controls structural representation enlarged drawing;
Fig. 8 is interior side's nested structure signal enlarged drawing;
Fig. 9 is a sealing cylinder structure signal enlarged drawing;
Figure 10 is a steel bonded carbide coil structures signal enlarged drawing;
Figure 11 is a plug structural representation enlarged drawing.
The specific embodiment
Embodiment 1
With reference to shown in Figure 1, further specify structure of the present invention.The present invention by the top connection that can be connected 1, two groups of fluid power water booster systems 2 with drilling tool and 3 and torque transmission device 4 form with the pressure of the drill tracking and early warning device 5.The upper end of fluid power water booster system 2 is connected with top connection 1 by the drilling rod screw thread, and the lower end is connected with the upper end of fluid power water booster system 3 by the drilling rod screw thread, constitutes the series connection of two fluid power water booster systems 2 and 3; The lower end of fluid power water booster system 3 is connected with interior side's cover 21 upper ends of torque transmission device 4 by the drilling rod screw thread.Torque transmission device 4 is made up of collar 59, back-up ring 11, pressure balance mechanism 12, outer square shaft 20, interior side cover 21, sealing ring 22 and 23; Interior side's cover 21 lower ends of torque transmission device 4 are connected with sealing cylinder 25 upper ends of the pressure of the drill tracking and early warning device 5 by the drilling rod screw thread; The outer square shaft 20 of torque transmission device 4 is an integral body with the axis 7 of the pressure of the drill tracking and early warning device 5 in this example; The top of outer square shaft 20 is by screw thread, and perhaps circlip groove is equipped with back-up ring 11, in this example be back-up ring 11 to be installed by screw thread, and loosening by collar 59 anti-Sealing shield rings 11 with the connecting thread of outer square shaft 20; Outer square shaft 20 cooperates with interior side cover 21, and it is spacing to pass through the following end joint of the back-up ring 11 of outer square shaft 20 upper ends and axis 7; Outer square shaft 20 top is equipped with balanced controls 12 on the face of cylinder, balanced controls 12 are annular pistons, ring realizes that with the face of cylinder, top 40 of outer square shaft 20 movable sealings cooperate by sealing ring 22 in it, and its outer ring is passed through sealing ring 23 and interior side and overlapped that the 45 realization movable sealings of circular hole face cooperate in 21 the top.The pressure of the drill tracking and early warning device 5 is made up of sealing cylinder 25, recoil simulator 13, axis 7, sealing mechanism 35 and 42, drainage mechanism 36.Recoil simulator 13 is installed on the axis 7, axis 7 by sealing mechanism 35 and 42 with the inner hole surface 47 realization movable sealings of sealing cylinder 25, and recoil simulator 13 is sealed in the endoporus 47 of fluid cylinder cover 25, but the lower contact of axis 7 is connected by drilling rod screw thread drill bit or drilling tool.The upper end of sealing cylinder 25 is overlapped 21 by the drilling rod screw thread with interior side and is connected, and in its lower end endoporus steel-bonded carbide circle 24 is installed, and is connected by screw thread and centring ring 14, and steel-bonded carbide circle 24 is fixed on the step 60 in the endoporus 48 that seals cylinder 25 lower ends.
With reference to shown in Figure 2, further specify the structure of fluid power water booster system of the present invention.Two fluid power water booster systems 2 and 3 are made up of liquid cylinder 27, piston 9, sealing ring 8, sealing ring 26, breather 10.Breather 10 is made up of the spiracle on the liquid cylinder 27 28, filter screen 15, interior side's gland 19 again.Filter screen 15 is installed on the endoporus step of spiracle 28, and interior side's gland 19 is installed in the internal thread hole of spiracle 28 by screw thread, and filter screen 15 is fixed on the endoporus step of spiracle 28.
Referring to shown in Figure 3, further specify the structure of recoil simulator of the present invention.Recoil simulator 13 of the present invention is made up of the telltale hole on the axis 7 29, sealing ring 16, pressure cap 17, carbide alloy mouth 18, anti-loose spot 30.Carbide alloy mouth 18 is installed on the interior step of telltale hole 29.Sealing ring 16 can be installed on the carbide alloy mouth, also can be installed in the telltale hole 29, and the sealing ring 16 in this example is mounted in the seal groove on the carbide alloy mouth 18, and has realized that telltale hole 29 cooperates with the static seal of the outer cylinder of carbide alloy mouth.Pressure cap 17 is installed in the internal thread hole of telltale hole 29 by screw thread, and fixing cooperating of carbide alloy mouth 18 and telltale hole 29.Pressure cap 17 can be taked variable pitch screw, also can take loosing Prevention Technology such as lock washer, prevent that pressure cap is loosening in the internal thread hole of telltale hole 29, taked processing Baltimore groove 31 on the outer face of pressure cap 17 and screw thread pair after telltale hole 29 cooperates in this example, anti-loose spot 30 cooperations are installed in the Baltimore groove 31, and take the fixedly cooperation between pressure cap 17, telltale hole 29 and the anti-loose spot 30 of cold-welding technique, prevent that pressure cap 17 is loosening.
Embodiment 3
Referring to figs. 1 through shown in Figure 11, further specify a kind of implementation step of fluid power pressurizer:
Step 101 is connected on a kind of fluid power pressurizer between drill bit and the drill collar, perhaps is connected between two drill collars, in the lower going-into-well.This moment, a kind of fluid power pressurizer was in extended state, 62 of lower surfaces that are balanced controls 12 are on the interior step 65 of interior side's cover 21,64 of the lower surfaces of back-up ring 11 are on the upper surface 63 of balanced controls 12, and the carbide alloy mouth 18 of synchronous signal device 13 faces 36 steel-bonded carbide circle 24 of drainage mechanism.
Step 102 is when circulating mud, and piston 9 is pushed down to initial point by mud pressure, promptly near breather 10.Part mud flows out through bit nozzle, and another part mud flows out through the annular space of axis 7 with steel-bonded carbide circle 24 by carbide alloy mouth 18.Assurance is with low pump pressure, big discharge capacity circulating mud.
When step 103 was normally crept into, the step surface 66 of axis 7 contacted with positioning sleeve 14, and the weight of part drill collar is put on drill bit.At this moment, the boss 50 of back-up ring 11 is pushed into initial point to piston 9, promptly near top connection 1.The recoil simulator 13 of the pressure of the drill tracking and early warning device 5 enters in the inner hole surface 47 of sealing cylinder 25, and sealing mechanism 35 is sealed in recoil simulator 13 in the inner hole surface 47 of sealing cylinder 25.Balanced controls 12 are looked the variation of sealing cylinder 25 internal volumes and are moved automatically, and drilling mud has only by the bit nozzle outflow, and the assurance drilling well is normally carried out.The pressure reduction of piston about in the of 9 of fluid power water booster system 2, the pressure P that is produced
1Act on the piston of fluid power pressurizer 3, and act on the boss 50 on the back-up ring 11; By the sawtooth 37 of piston 9 lower ends, produce pressure reduction up and down at the piston of fluid power water booster system 3, and produce pressure P thus
2Act on the boss 50 on the back-up ring 11; By the slit between two boss 50 of back-up ring 11, mud is square shaft 20 and axis 7 two ends generation pressure reduction outside, and produce pressure P
3, act between two boss 50 on the back-up ring 11; The pressure P that acts on back-up ring 11 upper surfaces is P
1, P
2And P
3Sum, pressure P are that mud fluid power is granted the pressure of the drill on the drill bit, and pass to drill bit by axis 7, constitute a part of normally creeping into required the pressure of the drill.
Step 104 is not if the pressure of the drill is added on the drill bit, perhaps drill bit does not contact the shaft bottom, then the piston 9 of fluid power water booster system 2,3 and axis 7 are pushed into down initial point by mud pressure, recoil simulator 13 faces steel-bonded carbide circle 24, and the high-pressure slurry in the drilling tool has increased flow pass, and mud pressure descends suddenly, the slush pump gage on ground in time reflects the reduction of pressure, and send the pressure of the drill early warning signal, indication the operator take measures, and send to drill bit and bore pressurization.
Step 105 is not if the pressure of the drill is added on the drill bit fully, when perhaps the drill bit the pressure of the drill of granting formation rock has reduced, then the piston 9 of fluid power water booster system 2,3 and axis 7 are pushed down to initial point one segment distance by mud pressure, when recoil simulator 13 faces the labyrinth seal mechanism groove 34 of sealing mechanism 36, along with constantly stretching out of axis 7, mud pressure constantly reduces, the slush pump gage value on ground constantly reduces, and the continuous reduction of early warning the pressure of the drill, indication the operator take measures, and in time send and bore pressurization.
Step 106 drilling mud jet is through the centre bore 67 of axis 7, when flowing through reaming 44, entrainment the mud in the reaming 44, pressure in the reaming 44 is reduced, between the mud in high-speed jet and the relative static reaming 44, shear generation high velocity, low pressure vortex region simultaneously, produce cavity, along with the increase of cavity with vanish, in reaming 44, produce the cavitation concussion, form the cavitation pulse jet.This cavitation pulse jet is again through the reinforcement of bit port and nozzle, the humorous resonance cavitation jet of generation sound, improved the instantaneous velocity of cavitation pulse jet, inject in the static relatively mud in shaft bottom, further bring out cavitation phenomenon, make the shaft bottom produce collar vortex stream, and cause shaft bottom moment low pressure, reduce the chip hold down effect of bottom rock chip, improved bit speed.
Last institute should illustrate, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment to technical scheme of the present invention, perhaps replace on an equal basis, and do not break away from the spirit and scope of technical solution of the present invention.
Claims (8)
1. a fluid power pressurizer comprises fluid power water booster system and torque transmission device; It is characterized in that: also connect the pressure of the drill tracking and early warning device in the lower end of torque transmission device; Wherein, the pressure of the drill tracking and early warning device comprises sealing cylinder, axis, recoil simulator, pumping equipment and sealing mechanism; The hollow piston of fluid power water booster system adopts inner-intubation; Foreign side's drive mechanism and pressure balance mechanism in torque transmission device adopts.
2. described fluid power water booster system comprises liquid cylinder, hollow piston; The liquid cylinder upper end is connected with top connection by the drilling rod screw thread, and its lower end is connected in series by the liquid cylinder of drilling rod screw thread and another fluid power water booster system, perhaps can be connected with interior side's cover of torque transmission device; The hollow piston upper end realizes that by sealing ring and liquid cylinder movable sealing cooperates, and its lower end realizes that by sealing ring and liquid cylinder lower end movable sealing cooperates; It is characterized in that: hollow piston adopts inner-intubation, the end of interpolation pipe is the convex-concave shape, wherein the end face of the hollow piston of the fluid power water booster system that is in series with it of boss is conflicted, the end face formation fluid power passage of the hollow piston of the fluid power water booster system that groove is in series with it.
3. described torque transmission device comprises outer square shaft, interior side's cover, back-up ring, jump ring, pressure balance mechanism; It is characterized in that: outer square shaft top is equipped with jump ring and back-up ring, and its top is equipped with pressure balance mechanism, and its middle part cooperates with interior side's cover, and its bottom is connected with axis, is one with axis perhaps; Pressure balance mechanism cooperates with the top endoporus of interior side's cover and the top cylinder formation movable sealing of outer square shaft respectively by sealing ring; The upper end of interior side cover is connected with the liquid cylinder of fluid power pressurizer by the drilling rod screw thread, and its lower end is connected with the pressure of the drill tracking and early warning device by the drilling rod screw thread.
4. the pressure of the drill tracking and early warning device according to claim 1, it is characterized in that: the upper end of the sealing cylinder of the pressure of the drill tracking and early warning device is connected with interior side's cover of torque transmission device by the drilling rod screw thread, its lower end endoporus is equipped with drainage mechanism, and is connected with centring ring by screw thread; The top of axis is connected with outer square shaft by the drilling rod screw thread, in its top cylinder recoil simulator is installed, its middle part constitutes movable sealing by sealing mechanism with the sealing cylinder and cooperates, its underpart is relative with the drainage mechanism of sealing cylinder bottom endoporus, its bottom can be connected with drill bit by the drilling rod screw thread, perhaps is connected with drilling tool.
5. the pressure of the drill tracking and early warning device according to claim 1 is characterized in that: the recoil simulator of the pressure of the drill tracking and early warning device is made up of telltale hole, carbide alloy mouth, sealing ring, pressure cap, anti-loose spot, and the carbide alloy mouth is installed on the interior step of telltale hole.Sealing ring can be installed on the carbide alloy mouth or be installed in the telltale hole, and pressure cap is installed in the internal thread hole of telltale hole by screw thread, and fixing cooperating of carbide alloy mouth and telltale hole.Pressure cap can be taked variable pitch screw, or takes lock washer, and takes to loosen the fixedly cooperation of the installation between pressure cap, telltale hole and the anti-loose spot of technology.
6. the pressure of the drill tracking and early warning device according to claim 1, it is characterized in that: the drainage mechanism of the pressure of the drill tracking and early warning device is made up of stepped hole in steel-bonded carbide ring, centring ring and the sealing cylinder bottom portion, the steel-bonded carbide ring is installed on the sealing cylinder bottom portion endoporus step, centring ring can adopt multiple modes such as screw thread or jump ring that the steel-bonded carbide ring is fixed on the sealing cylinder bottom portion endoporus step, the present invention is installed in centring ring in the sealing cylinder bottom portion internal thread hole by screw thread, and the steel-bonded carbide ring is fixed on the sealing cylinder bottom portion endoporus step;
7. the pressure of the drill tracking and early warning device according to claim 1 is characterized in that: the sealing mechanism of the pressure of the drill tracking and early warning device is made up of self-feeding type compensating ring, rubber seal, soft metal sealing ring and labyrinth seal mechanism; The self-feeding type compensating ring is installed in the seal groove of inner end with rubber seal, the one side of self-feeding type compensating ring directly contacts with highly pressurised liquid (mud), another side contacts with rubber seal, the soft metal sealing ring is installed in the seal groove of outer end with the self-feeding type compensating ring, the one side of soft metal sealing ring contacts with highly pressurised liquid (mud), and another side contacts with the self-feeding type compensating ring.Labyrinth seal mechanism is arranged on the place, aperture, outer end of soft metal seal groove.
8. the pressure of the drill tracking and early warning device according to claim 1 is characterized in that: the endoporus of the axis of the pressure of the drill tracking and early warning device is processed with the mud the self-excited oscillation cavity, and the size of the self-excited oscillation cavity is the structural calculation gained according to slurry jet performance and axis.
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| CN2011101828650A CN102242606A (en) | 2011-07-01 | 2011-07-01 | Hydraulic pressurizer |
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| CN2011101828650A CN102242606A (en) | 2011-07-01 | 2011-07-01 | Hydraulic pressurizer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105526043A (en) * | 2015-07-02 | 2016-04-27 | 山东东远石油装备有限公司 | Volumetric linear motor |
| CN105937373A (en) * | 2016-05-26 | 2016-09-14 | 中国石油集团渤海钻探工程有限公司 | Dead point location indicating type damping thruster |
| CN110593752A (en) * | 2019-10-22 | 2019-12-20 | 中国地质大学（北京） | All-metal downhole power drilling tool based on multi-stage double-plunger-eccentric gear mechanism |
| CN110646174A (en) * | 2018-06-08 | 2020-01-03 | 中国石油化工股份有限公司 | Testing device and testing method for performance parameters of auxiliary drilling tool |
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| CN105526043B (en) * | 2015-07-02 | 2017-12-29 | 山东东远石油装备有限公司 | A kind of positive displacement line motor |
| CN105937373A (en) * | 2016-05-26 | 2016-09-14 | 中国石油集团渤海钻探工程有限公司 | Dead point location indicating type damping thruster |
| CN105937373B (en) * | 2016-05-26 | 2018-07-03 | 中国石油集团渤海钻探工程有限公司 | Stop positions indicator type shock-absorbing thrustor |
| CN110646174A (en) * | 2018-06-08 | 2020-01-03 | 中国石油化工股份有限公司 | Testing device and testing method for performance parameters of auxiliary drilling tool |
| CN110593752A (en) * | 2019-10-22 | 2019-12-20 | 中国地质大学（北京） | All-metal downhole power drilling tool based on multi-stage double-plunger-eccentric gear mechanism |
| CN110593752B (en) * | 2019-10-22 | 2024-03-22 | 中国地质大学（北京） | All-metal underground power drilling tool based on multistage double-plunger-eccentric gear mechanism |
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