CN103362449B - A kind of retraction type long stroke hydraulic power pressurizer - Google Patents
A kind of retraction type long stroke hydraulic power pressurizer Download PDFInfo
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- CN103362449B CN103362449B CN201310327533.6A CN201310327533A CN103362449B CN 103362449 B CN103362449 B CN 103362449B CN 201310327533 A CN201310327533 A CN 201310327533A CN 103362449 B CN103362449 B CN 103362449B
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Abstract
The present invention relates to a kind of retraction type long stroke hydraulic power pressurizer, upper shell, middle cylinder and lower shell connect and compose shell body successively, upper shell top and drill collar spin, mandrel is inserted with in shell body, mandrel upper end is positioned at upper shell inner chamber and is connected with top connection, mandrel bottom is provided with mandrel shoulder and is supported on below the lower port of lower shell, and mandrel shoulder lower end is connected with mud motor; The central duct of mandrel and top connection and the central duct of shell body connect, sealing is realized between mandrel and lower shell, the top perisporium of mandrel is provided with guiding elongated slot and extends in the middle part of mandrel, and middle cylinder inwall is arranged with saddle, and saddle is embedded in guiding elongated slot respectively.Guiding elongated slot below be connected to arc chute, arc chute be cylindrical spiral and lower end respectively to right bank, be respectively equipped with the short groove in the location extended in the axial direction directly over arc chute lower end.This hydraulic thruster realizes flexibly connecting between drill collar and drill bit, and structure is simple, reliable in action.
Description
Technical field
The present invention relates to a kind of drilling tool, particularly a kind of retraction type long stroke hydraulic power pressurizer, belong to oil and gas well drilling technical field of tools.
Background technology
In oil and gas well drilling, normally driven the bit fractured rock of below by drill string in well, in well, drill string is primarily of drilling rod and drill collar composition.
In directional well and horizontal well drilling process, often change well direction, increasing hole angle, drop angle by slipping drilling mode, sometimes also use slipping drilling mode drilled straight well.In slipping drilling process, due to reasons such as cutting bed, well track are not round and smooth, property of drilling fluid is poor, the rubbing action of drill string and the borehole wall is large, and the pressure of the drill that the load causing the hook suspending drill string in midair to reduce and drill bit bear is inconsistent.The load part that hook reduces is the friction of drill string and the borehole wall, and remaining part is just added on drill bit.Also have in decentralization process, drill string can uneven downslide, easily causes drill bit to clash into shaft bottom suddenly, sometimes drill bit and mud motor may be damaged, make screw pump suppress pump seal line be rushed to open and stop operating, cause mechanical drilling speed etc., this phenomenon is called the backing pressure problem of slipping drilling.For alleviating backing pressure, the measuring apparatus except Drilling optimization section, application of advanced controls well track, preferably drilling fluid system safeguard except property of drilling fluid well, and also application specific instrument alleviates backing pressure, usually between drill bit and drill collar, installs hydraulic thruster additional.
Summary of the invention
The object of the invention is to, overcome problems of the prior art, provide a kind of retraction type long stroke hydraulic power pressurizer, structure is simple, and reliable in action, can realize flexibly connecting between drill collar and drill bit.
For solving above technical problem, a kind of retraction type long stroke hydraulic power pressurizer provided by the present invention, comprise coaxial line and center is equipped with the upper shell of through hole, middle cylinder and lower shell, described upper shell, middle cylinder and lower shell connect and compose shell body from top to bottom successively, the upper inside wall of described upper shell is provided with the upper shell tapered thread spun mutually with drill collar, mandrel is inserted with from bottom to top in the central duct of described shell body, the upper end of described mandrel is positioned at the inner chamber of described upper shell and is connected with top connection, the bottom of described mandrel is provided with mandrel shoulder, described mandrel shoulder is supported on below the lower port of described lower shell, the lower end of described mandrel shoulder is provided with the mandrel tapered thread that can be connected with mud motor, the central duct that described mandrel and top connection are equipped with central duct and described shell body connects, the top perisporium of described mandrel is provided with guiding elongated slot, described guiding elongated slot extends in the middle part of mandrel in the axial direction, the inwall of described middle cylinder is arranged with saddle, and described saddle is embedded in respectively in described guiding elongated slot and also relatively can moves up and down along guiding elongated slot, realize sealing respectively by sealing ring between the lower end of described upper shell and the upper end of middle cylinder, between the lower end of described middle cylinder and the upper end of described lower shell, between the inwall of described lower shell and described mandrel.
Relative to prior art, the present invention achieves following beneficial effect: shell body is divided into three sections of connections, is convenient to the saddle on processing inwall and installs joint; During assembling, first middle cylinder and lower shell are spun, just middle cylinder and lower shell are sleeved on the mandrel shoulder of mandrel to make the saddle of middle cylinder aim at the guiding elongated slot of mandrel again, then spin on the top of mandrel top connection, then upper shell be set with mandrel upper end and spin with middle cylinder, finally the upper shell tapered thread of upper shell and top drill collar are spun, mandrel tapered thread and mud motor are spun, below mud motor, is connected with drill bit.When slush pump starts, when the hydraulic cavities on top connection top has drilling fluid to inject, top connection promotes mandrel and moves down, and the saddle of middle cylinder is embedded in the guiding elongated slot of mandrel and edge guiding elongated slot and slides, can avoid freely rotating between shell body and mandrel, and realize transmitting torque; This hydraulic thruster utilizes the pressure of drilling fluid promotion mandrel descending, mandrel drives drill bit to creep into, achieve when upper drilling string is motionless, the pressure of the drill is applied to drill bit, drill bit or lower drilling tool and drill collar are achieved flexibly connect, rigid pressurized drill collar being given drill bit becomes fluid power flexible pressurizing, overcomes the drawbacks such as boring inequality, bouncing of drilling tool, false the pressure of the drill of sending of rigid pressurized existence, can provide enough, stable, controlled the pressure of the drill to drill bit.The Lower Half of mandrel does not have groove, is conducive to sealing.The top connection at mandrel top can protect saddle to avoid being clashed into when mandrel moves downward; When saddle damages, top connection can prevent mandrel from dropping, and when mandrel stretches out trip-out entirely, saddle bears the weight of lower drilling tool.
As preferred version of the present invention, the below of described guiding elongated slot is connected to arc chute, described arc chute be cylindrical spiral and lower end respectively to right bank, be respectively equipped with directly over described arc chute lower end along mandrel axis direction extend the short groove in location.Before lower brill, be stuck in by saddle in the short groove in location and tangled by mandrel, mandrel is retracted in shell body, is not easy by mud drum, blocks, scratch or cause blow-by; Then carry out lower brill, instantly get into position, after drill bit touches shaft bottom, it is up relative to shell body that drill bit promotes mandrel, and saddle is positioned at the lower end of arc chute; Then open slush pump and make circulation of drilling fluid, start mud motor simultaneously and make bit, under the synergy of drilling liquid pressure and mud motor, drill bit fractured rock creeps into.Because mud motor can give mandrel moment of torsion, additional drilling fluid thrust, saddle enters guiding elongated slot along arc chute relative uplink; Because guiding elongated slot is long, the stroke ratio of the extended shell body of mandrel is larger; During trip-out, slush pump quits work, lowering drill pipes is descending, and mandrel makes saddle enter arc chute along guiding elongated slot relative motion under the reaction force of shaft bottom, when saddle relative motion is to the lower end of arc chute, stop lowering drill pipes, change trip-out into, it is up that shell body carried by drilling rod, and saddle is stuck in the short groove in location again, mandrel is in retraction shell body, then mud motor and drill bit is mentioned; When lower brill or trip-out, mandrel is all in indentation state, is conducive to protecting down-hole equipment, extends drill tool life.
As preferred version of the present invention, the two ends up and down of described saddle are respectively equipped with domed head.The domed head at saddle two ends can play the guiding role.
As preferred version of the present invention, the perisporium of described top connection is evenly distributed with multiple guiding gutter, described guiding gutter extends along the overall length direction of described top connection.When guiding gutter is conducive to down stroke, returning out of drilling fluid.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation, and accompanying drawing only provides reference and explanation use, is not used to limit the present invention.
Fig. 1 is the structural representation of retraction type long stroke hydraulic power pressurizer of the present invention.
Fig. 2 is the structural representation of upper shell in retraction type long stroke hydraulic power pressurizer of the present invention.
Fig. 3 is the front view of middle cylinder in retraction type long stroke hydraulic power pressurizer of the present invention.
Fig. 4 is the sectional view along A-A in Fig. 3.
Fig. 5 is the top view of Fig. 3.
Fig. 6 is the structural representation of lower shell in retraction type long stroke hydraulic power pressurizer of the present invention.
Fig. 7 is the front view of mandrel in retraction type long stroke hydraulic power pressurizer of the present invention.
Fig. 8 is the expanded view of Fig. 7 top circumferential wall.
Fig. 9 is the front view of top connection in retraction type long stroke hydraulic power pressurizer of the present invention.
Figure 10 is the upward view of Fig. 9.
In figure: 1. upper shell; 1a. upper shell tapered thread; 1b. upper shell box thread; 1c. hydraulic cavities; 2. middle cylinder; 2a. saddle; 2b. middle cylinder male thread; 2c. middle cylinder box thread; 2d. middle cylinder seal groove; 3. lower shell; 3a. lower shell male thread; 3b. lower shell external seal groove; Seal groove in 3c. lower shell; 4. mandrel; 4a. mandrel male thread; 4b. mandrel shoulder; 4c. mandrel tapered thread; 4d. leads elongated slot; 4e. arc chute; 4f. locates short groove; 4g. stem seal groove; 5. top connection; 5a. top connection box thread; 5b. guiding gutter.
Detailed description of the invention
As shown in Figures 1 to 10, retraction type long stroke hydraulic power pressurizer of the present invention comprises coaxial line and center is equipped with the upper shell 1 of through hole, middle cylinder 2 and lower shell 3, upper shell 1, middle cylinder 2 and lower shell 3 are tightly connected formation shell body from top to bottom successively, mandrel 4 is inserted with from bottom to top in the central duct of shell body, the upper end of mandrel 4 is positioned at the inner chamber of upper shell 1 and is connected with top connection 5, the bottom of mandrel 4 is provided with mandrel shoulder 4b, mandrel shoulder 4b is supported on below the lower port of lower shell 3, the central duct that mandrel 4 and top connection 5 are equipped with central duct and shell body connects, between the lower end of upper shell 1 and the upper end of middle cylinder 2, between the lower end of middle cylinder 2 and the upper end of lower shell 3, between the inwall of lower shell 3 and mandrel 4, realize sealing respectively by sealing ring between the upper end of mandrel 4 and the inwall of top connection 5.
As shown in Figure 2, the upper inside wall of upper shell 1 is provided with the upper shell tapered thread 1a spun mutually with drill collar, and the inner wall lower of upper shell is provided with the upper shell box thread 1b be connected with middle cylinder 2.
As shown in Figures 3 to 5, the upper end of middle cylinder 2 is provided with the middle cylinder male thread 2b spun with upper shell box thread 1b, the root of middle cylinder male thread 2b is provided with middle cylinder seal groove 2d, is provided with sealing ring and upper shell 1 realizes sealing in middle cylinder seal groove 2d.The lower end inner wall of middle cylinder 2 is provided with middle cylinder box thread 2c, and middle cylinder box thread 2c is connected with lower shell 3.Be arranged with saddle 2a in the middle part of the inwall of middle cylinder 2, the two ends up and down of saddle 2a are respectively equipped with domed head to play guide effect.
As shown in Figure 6, the upper end of lower shell 3 is provided with lower shell male thread 3a, lower shell male thread 3a and middle cylinder box thread 2c spins, and the root of lower shell male thread 3a is provided with lower shell external seal groove 3b, and the inwall being provided with sealing ring and middle cylinder 2 in lower shell external seal groove 3b realizes sealing.The inwall lower end of lower shell 3 is provided with seal groove 3c in lower shell, is provided with U-shaped sealing ring or felt and mandrel 4 and realizes sealing in lower shell in seal groove 3c.
As shown in Figure 7 and Figure 8, the upper end of mandrel 4 is provided with mandrel male thread 4a, and mandrel male thread 4a is connected with top connection 5, and mandrel male thread 4a root is provided with stem seal groove 4g, can be provided with sealing ring and top connection 5 realizes sealing in stem seal groove 4g.The top perisporium of mandrel 4 is provided with guiding elongated slot 4d, and guiding elongated slot 4d extends in the middle part of mandrel in the axial direction, and the saddle 2a of middle cylinder 2 is embedded in respectively in guiding elongated slot 4d and also can moves up and down along guiding elongated slot 4d.The below of guiding elongated slot 4d is connected to arc chute 4e, arc chute 4e be cylindrical spiral and lower end respectively to right bank, be left circular helix, directly over arc chute 4e lower end, be respectively equipped with the short groove 4f in location extended along mandrel axis direction.The lower end of mandrel shoulder 4b is provided with the mandrel tapered thread 4c that can be connected with mud motor.
As shown in Figure 9, Figure 10, the inwall lower end of top connection 5 is provided with top connection box thread 5a, and top connection box thread 5a and mandrel male thread 4a spins, and the perisporium of top connection 5 is evenly distributed with multiple guiding gutter 5b, and guiding gutter 5b extends along the overall length direction of top connection 5.When guiding gutter 5b is conducive to down stroke, returning out of drilling fluid.
During assembling, first middle cylinder 2 and lower shell 3 are spun, just middle cylinder 2 and lower shell 3 are sleeved on the mandrel shoulder 4b of mandrel 4 to make the saddle 2a of middle cylinder 2 aim at the guiding elongated slot 4d of mandrel 4 again, then spin on the top of mandrel 4 top connection 5, then upper shell 1 be set with mandrel 4 upper end and spin with middle cylinder 2, finally the upper shell tapered thread 1a of upper shell 1 and top drill collar are spun, by mandrel tapered thread 4c with spin with mud motor, connect below mud motor drill bit finishing equipment install.
In work, when slush pump starts, when the hydraulic cavities 1c on top connection 5 top has drilling fluid to inject, top connection 5 promotes mandrel 4 and moves down, the saddle 2a of middle cylinder is embedded in the guiding elongated slot 4d of mandrel 4, can avoid freely rotating between shell body and mandrel 4, and realize transmitting torque; This hydraulic thruster utilizes the pressure of drilling fluid promotion mandrel 4 descending, mandrel 4 drives drill bit to creep into, achieve when upper drilling string is motionless, the pressure of the drill is applied to drill bit, drill bit or lower drilling tool and drill collar are achieved flexibly connect, rigid pressurized drill collar being given drill bit becomes fluid power flexible pressurizing.
In going down process, the top of saddle 2a is arranged in the short groove 4f in location, and now mandrel 4 is retracted in shell body substantially; Instantly get into position, after drill bit touches shaft bottom, it is up relative to shell body that drill bit promotes mandrel 4, and saddle 2a is positioned at the lower end of arc chute 4e; Then open slush pump and make circulation of drilling fluid, start mud motor simultaneously and make bit, under the synergy of drilling liquid pressure and mud motor, drill bit fractured rock creeps into.Because mud motor can give mandrel 4 one reaction torques, saddle 2a is advanced into guiding elongated slot 4d on arc chute 4e, and namely saddle 2a relative sliding in guiding elongated slot 4d achieves the flexible of mandrel 4.
During trip-out, slush pump quits work, lowering drill pipes is descending, and mandrel 4 makes saddle enter arc chute 4e along guiding elongated slot 4d relative motion under the reaction force of shaft bottom, when saddle 2a relative motion is to the lower end of arc chute 4e, stop lowering drill pipes, change trip-out into, it is up that shell body carried by drilling rod, and saddle 2a is stuck in the short groove 4f in location again, mandrel 4 is in retraction shell body, then mud motor and drill bit is mentioned.
The foregoing is only the better possible embodiments of the present invention, non-ly therefore limit to scope of patent protection of the present invention.In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection domain of application claims.
Claims (3)
1. a retraction type long stroke hydraulic power pressurizer, comprise coaxial line and center is equipped with the upper shell of through hole, middle cylinder and lower shell, described upper shell, middle cylinder and lower shell connect and compose shell body from top to bottom successively, the upper inside wall of described upper shell is provided with the upper shell tapered thread spun mutually with drill collar, mandrel is inserted with from bottom to top in the central duct of described shell body, it is characterized in that: the upper end of described mandrel is positioned at the inner chamber of described upper shell and is connected with top connection, the bottom of described mandrel is provided with mandrel shoulder, described mandrel shoulder is supported on below the lower port of described lower shell, the lower end of described mandrel shoulder is provided with the mandrel tapered thread that can be connected with mud motor, the central duct that described mandrel and top connection are equipped with central duct and described shell body connects, the top perisporium of described mandrel is provided with guiding elongated slot, described guiding elongated slot extends in the middle part of mandrel in the axial direction, the inwall of described middle cylinder is arranged with saddle, and described saddle is embedded in respectively in described guiding elongated slot and also relatively can moves up and down along guiding elongated slot, realize sealing respectively by sealing ring between the lower end of described upper shell and the upper end of middle cylinder, between the lower end of described middle cylinder and the upper end of described lower shell, between the inwall of described lower shell and described mandrel, the below of described guiding elongated slot is connected to arc chute, described arc chute be cylindrical spiral and lower end respectively to right bank, be respectively equipped with directly over described arc chute lower end along mandrel axis direction extend the short groove in location.
2. retraction type long stroke hydraulic power pressurizer according to claim 1, is characterized in that: the two ends up and down of described saddle are respectively equipped with domed head.
3. retraction type long stroke hydraulic power pressurizer according to claim 1 and 2, is characterized in that: the perisporium of described top connection is evenly distributed with multiple guiding gutter, and described guiding gutter extends along the overall length direction of described top connection.
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| CN201310327533.6A CN103362449B (en) | 2013-07-31 | 2013-07-31 | A kind of retraction type long stroke hydraulic power pressurizer |
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| CN201310327533.6A CN103362449B (en) | 2013-07-31 | 2013-07-31 | A kind of retraction type long stroke hydraulic power pressurizer |
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| CN103362449B true CN103362449B (en) | 2015-11-18 |
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| CN104533314A (en) * | 2014-12-04 | 2015-04-22 | 刘岩 | Multi-effect lifting pressurizing device for drilling tool |
| CN104863497B (en) * | 2015-04-20 | 2018-01-30 | 中国地质大学（武汉） | A kind of drill bit spiral percussion mechanism |
| CN104895506A (en) * | 2015-05-14 | 2015-09-09 | 西南石油大学 | Flexible feeding short section |
| CN106639897B (en) * | 2015-10-30 | 2019-03-08 | 中石化石油工程技术服务有限公司 | A kind of double fluid drilling rod underground isolation runner conversion equipment |
| CN115538961B (en) * | 2022-11-30 | 2023-05-12 | 胜利油田龙玺石油工程服务有限责任公司 | Mud collection device for vehicle-mounted drilling machine well drilling |
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| RU2176304C2 (en) * | 1999-09-06 | 2001-11-27 | ОАО "Ижевский завод нефтяного машиностроения" | Expansion joint |
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