CN103362449A - Retraction type long stroke hydraulic power pressurizer - Google Patents
Retraction type long stroke hydraulic power pressurizer Download PDFInfo
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- CN103362449A CN103362449A CN2013103275336A CN201310327533A CN103362449A CN 103362449 A CN103362449 A CN 103362449A CN 2013103275336 A CN2013103275336 A CN 2013103275336A CN 201310327533 A CN201310327533 A CN 201310327533A CN 103362449 A CN103362449 A CN 103362449A
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Abstract
The invention relates to a retraction type long stroke hydraulic power pressurizer. An upper barrel body, a middle barrel body and a lower barrel body are sequentially connected to form an outer shell, the upper part of the upper barrel body is vortically connected with a drill collar, a core shaft is inserted into the outer shell, the upper end of the core shaft is positioned in the inner cavity of the upper barrel body, and is vortically connected with an upper connector, the lower part of the core shaft is provided with a core shaft circular bead which is supported under a lower end opening of the lower barrel body, and the lower end of the core shaft circular bead is connected with a downhole motor; and center ducts of the core shaft and the upper connector are communicated with a center duct of the outer shell, the core shaft and the lower barrel body are sealed, the circumferential wall of the upper part of the core shaft is provided with guiding long slots extending to the middle part of the core shaft, and the inner wall of the middle barrel body is symmetrically provided with support tables which are respectively embedded in the guiding long slots. The lower parts of the guiding long slots are respectively connected with an arc-shaped sliding chute, the arc-shaped sliding chutes are cylindrical spirals, the lower ends of the arc-shaped sliding chutes are respectively tilted to the right, and positioning short slots extending along the axis direction are respectively arranged over the lower ends of the arc-shaped sliding chutes. According to the hydraulic power pressurizer, flexible connection between the drill collar and a drill bit is realized, and the hydraulic power pressurizer has a simple structure and is operated reliably.
Description
Technical field
The present invention relates to a kind of drilling tool, particularly a kind of retraction long stroke hydraulic thruster belongs to the oil and gas well drilling technical field of tools.
Background technology
In oil and gas well drilling, normally drive the bit fractured rock of below by drill string in the well, drill string mainly is comprised of drilling rod and drill collar in the well.
Creep in the process at directional well and horizontal well, often will change well direction, increasing hole angle, drop angle with the slip mode of creeping into, sometimes also creep into the mode drilled straight well with sliding.In the slip drilling process, owing 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, causes suspending in midair the pressure of the drill that load that the hook of drill string reduces and drill bit bear inconsistent.The load part that hook reduces is the friction of drill string and the borehole wall, and remaining part just is added on the drill bit.Transfer in addition in the process, the inhomogeneous downslide of drill string meeting easily causes drill bit to clash into suddenly the shaft bottom, sometimes may damage drill bit and mud motor, make screw pump suppress the pump seal line and be rushed to open and stop operating, cause machinery-free drilling speed etc., this phenomenon is called the backing pressure problem of sliding and creeping into.For alleviating backing pressure, control well track, preferred drilling fluid system and safeguard the property of drilling fluid well except the measuring apparatus of optimizing drill column, application of advanced, also the application specific instrument alleviates backing pressure, usually installs hydraulic thruster additional between drill bit and drill collar.
Summary of the invention
The object of the invention is to, overcome problems of the prior art, a kind of retraction long stroke hydraulic thruster is provided, simple in structure, reliable in action can realize flexibly connecting between drill collar and the drill bit.
For solving above technical problem, a kind of retraction long stroke hydraulic thruster provided by the present invention, comprise that coaxial line and center are equipped with the upper shell of through hole, middle cylindrical shell and lower shell, described upper shell, middle cylindrical shell 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 that spins mutually with drill collar, be inserted with mandrel in the central duct of described shell body from bottom to top, 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 the mandrel shoulder, described mandrel shoulder is supported on the lower port below of described lower shell, and 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 the guiding elongated slot, described guiding elongated slot extends to the mandrel middle part along axis direction, the inwall of cylindrical shell is arranged with saddle in the middle of described, and described saddle is embedded in respectively in the described guiding elongated slot and can relatively moves up and down along the guiding elongated slot; Between the lower end of described upper shell and the upper end of middle cylindrical shell, described in the middle of between the upper end of lower end and described lower shell of cylindrical shell, seal by the sealing ring realization respectively between the inwall of described lower shell and the described mandrel.
With respect to prior art, the present invention has obtained following beneficial effect: shell body is divided into three sections connections, is convenient to process the saddle on the inwall and installs joint; During assembling, first middle cylindrical shell and lower shell are spun, the just middle cylindrical shell of the guiding elongated slot of the saddle of cylindrical shell aligning mandrel and lower shell are sleeved on the mandrel shoulder of mandrel in the middle of making again, then top connection spins on the top of mandrel, then upper shell is set with on the mandrel and with middle cylindrical shell and spins, upper shell tapered thread and top drill collar with upper shell spins at last, and mandrel tapered thread and mud motor are spun, and the mud motor below is connected with drill bit.When slush pump starts, when the hydraulic cavities on top connection top had drilling fluid to inject, top connection promoted mandrel and moves down, and the saddle of middle cylindrical shell is embedded in the guiding elongated slot of mandrel and along the guiding elongated slot and slides, can avoid freely rotating between shell body and the mandrel, and realize transmitting torque; This hydraulic thruster is to utilize the pressure promotion mandrel of drilling fluid descending, mandrel drives drill bit and creeps into, realized in the situation that upper drilling string is motionless, apply the pressure of the drill to drill bit, make drill bit or lower drilling tool and drill collar realize flexibly connecting, the rigid pressurized that drill collar is given drill bit becomes the fluid power flexible pressurizing, has overcome 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 damaged, top connection can prevent that mandrel from dropping, and mandrel stretches out when pulling out of hole entirely, and saddle bears the weight of lower drilling tool.
As preferred version of the present invention, the below of described guiding elongated slot is connected with respectively arc chute, described arc chute is that cylindrical spiral and lower end are tilted to the right respectively, is respectively equipped with the short groove in location that extends along the mandrel axis direction directly over the described arc chute lower end.Before the lower brill, saddle is stuck in the location mandrel is tangled in the short groove, mandrel is retracted in the shell body, is not easy by mud drum, blocks, scratch or cause blow-by; Then carry out lower brill, instantly get into the position, after drill bit touched the shaft bottom, it is up with respect 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 simultaneously mud motor and make bit, under the synergy of drilling liquid pressure and mud motor, the drill bit fractured rock creeps into.Because mud motor can give moment of torsion of mandrel, add drilling fluid thrust, saddle is advanced into the guiding elongated slot along arc chute on relatively; Because the guiding elongated slot is long, the stroke ratio of the extended shell body of mandrel is larger; During trip-out, slush pump quits work, transfer drilling rod descending, mandrel makes saddle enter arc chute along guiding elongated slot relative motion under the reaction force of shaft bottom, when saddle relative motion during to the lower end of arc chute, stop to transfer drilling rod, change trip-out into, it is up that drilling rod is being carried shell body, and saddle is stuck in the short groove in location again, mandrel is in the retraction shell body, then mud motor and drill bit is mentioned; When lower brill or trip-out, mandrel all is in the indentation state, is conducive to protect down-hole equipment, prolongs drill tool life.
As preferred version of the present invention, the up and down two ends of described saddle are respectively equipped with semicircle head.The semicircle head at saddle two ends can play the guiding role.
As preferred version of the present invention, be evenly distributed with a plurality of guiding gutters on the perisporium of described top connection, described guiding gutter extends along the overall length direction of described top connection.When guiding gutter is conducive to down stroke, the returning out of drilling fluid.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments, and accompanying drawing only provides reference and explanation usefulness, and is non-in order to limit the present invention.
Fig. 1 is the structural representation of retraction long stroke hydraulic thruster of the present invention.
Fig. 2 is the structural representation of upper shell in the retraction long stroke hydraulic thruster of the present invention.
Fig. 3 is the front view of middle cylindrical shell in the retraction long stroke hydraulic thruster of the present invention.
Fig. 4 is along the sectional view of A-A among Fig. 3.
Fig. 5 is the top view of Fig. 3.
Fig. 6 is the structural representation of lower shell in the retraction long stroke hydraulic thruster of the present invention.
Fig. 7 is the front view of mandrel in the retraction long stroke hydraulic thruster of the present invention.
Fig. 8 is the expanded view of Fig. 7 top circle wall.
Fig. 9 is the front view of top connection in the retraction long stroke hydraulic thruster of the present invention.
Figure 10 is the upward view of Fig. 9.
Among the figure: 1. upper shell; 1a. upper shell tapered thread; 1b. upper shell box thread; 1c. hydraulic cavities; 2. middle cylindrical shell; 2a. saddle; 2b. middle cylindrical shell male thread; 2c. middle cylindrical shell box thread; 2d. middle cylindrical shell seal groove; 3. lower shell; 3a. lower shell male thread; 3b. lower shell external seal groove; 3c. seal groove in the lower shell; 4. mandrel; 4a. mandrel male thread; 4b. mandrel shoulder; 4c. mandrel tapered thread; 4d. guiding elongated slot; 4e. arc chute; 4f. locate short groove; 4g. stem seal groove; 5. top connection; 5a. top connection box thread; 5b. guiding gutter.
The specific embodiment
Extremely shown in Figure 10 such as Fig. 1, retraction long stroke hydraulic thruster of the present invention comprises that coaxial line and center are equipped with the upper shell 1 of through hole, middle cylindrical shell 2 and lower shell 3, upper shell 1, middle cylindrical shell 2 and the lower shell 3 formation shell body that is tightly connected successively from top to bottom, be inserted with mandrel 4 in the central duct of shell body from bottom to top, 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 the lower port below 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 upper end of the lower end of upper shell 1 and middle cylindrical shell 2, between the lower end of middle cylindrical shell 2 and the upper end of lower shell 3, between the inwall of lower shell 3 and the mandrel 4, realize sealing by sealing ring respectively between the inwall of the upper end of mandrel 4 and 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 that spins mutually with drill collar, and the inwall bottom of upper shell is provided with the upper shell box thread 1b that is connected with middle cylindrical shell 2.
Extremely shown in Figure 5 such as Fig. 3, the upper end of middle cylindrical shell 2 is provided with the middle cylindrical shell male thread 2b that spins with upper shell box thread 1b, cylindrical shell seal groove 2d in the middle of the root of middle cylindrical shell male thread 2b is provided with is provided with sealing ring among the middle cylindrical shell seal groove 2d and upper shell 1 is realized sealing.Cylindrical shell box thread 2c in the middle of the lower end inwall of middle cylindrical shell 2 is provided with, middle cylindrical shell box thread 2c is connected with lower shell 3.The inwall middle part of middle cylindrical shell 2 is arranged with saddle 2a, and the up and down two ends of saddle 2a are respectively equipped with semicircle 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 cylindrical shell box thread 2c spin, and the root of lower shell male thread 3a is provided with lower shell external seal groove 3b, and the inwall that is provided with sealing ring and middle cylindrical shell 2 among the lower shell external seal groove 3b is realized sealing.The inwall lower end of lower shell 3 is provided with seal groove 3c in the lower shell, U-shaped sealing ring or felt and mandrel 4 is installed among the seal groove 3c in the lower shell realizes sealing.
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 realization sealings among the stem seal groove 4g.The top perisporium of mandrel 4 is provided with guiding elongated slot 4d, and guiding elongated slot 4d extends to the mandrel middle part along axis direction, and the saddle 2a of middle cylindrical shell 2 is embedded in respectively among the guiding elongated slot 4d and can moves up and down along guiding elongated slot 4d.The below of guiding elongated slot 4d is connected with respectively arc chute 4e, and arc chute 4e is that cylindrical spiral and lower end are tilted to the right respectively, is left circular helix, is respectively equipped with the short groove 4f in location that extends along the mandrel axis direction directly over the arc chute 4e lower end.The lower end of mandrel shoulder 4b is provided with the mandrel tapered thread 4c that can be connected with mud motor.
Such as Fig. 9, shown in 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 spin, and are evenly distributed with a plurality of guiding gutter 5b on the perisporium of top connection 5, and guiding gutter 5b extends along the overall length direction of top connection 5.When guiding gutter 5b is conducive to down stroke, the returning out of drilling fluid.
During assembling, first middle cylindrical shell 2 and lower shell 3 are spun, the just middle cylindrical shell 2 of the guiding elongated slot 4d of the saddle 2a of cylindrical shell 2 aligning mandrel 4 and lower shell 3 are sleeved on the mandrel shoulder 4b of mandrel 4 in the middle of making again, then top connection 5 spins on the top of mandrel 4, then spin with upper shell 1 suit mandrel 4 upper ends and with middle cylindrical shell 2, upper shell tapered thread 1a and top drill collar with upper shell 1 spins at last, with mandrel tapered thread 4c with spin with mud motor, mud motor below connects the drill bit finishing equipment and installs.
In the work, when the slush pump startup, when the hydraulic cavities 1c on top connection 5 tops has drilling fluid to inject, top connection 5 promotes mandrel 4 and moves down, the saddle 2a of middle cylindrical shell is embedded among the guiding elongated slot 4d of mandrel 4, can avoid freely rotating between shell body and the mandrel 4, and realize transmitting torque; This hydraulic thruster is to utilize the pressure promotion mandrel 4 of drilling fluid descending, mandrel 4 drives drill bit and creeps into, realized in the situation that upper drilling string is motionless, apply the pressure of the drill to drill bit, make drill bit or lower drilling tool and drill collar realize flexibly connecting, the rigid pressurized that drill collar is given drill bit becomes the fluid power flexible pressurizing.
In going down process, the top of saddle 2a is arranged in the short groove 4f in location, and this moment, mandrel 4 was retracted in the shell body substantially; Instantly get into the position, after drill bit touched the shaft bottom, it is up with respect 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 simultaneously mud motor and make bit, under the synergy of drilling liquid pressure and mud motor, the drill bit fractured rock creeps into.Because mud motor can be given 4 one reaction torques of mandrel, saddle 2a is advanced into guiding elongated slot 4d on arc chute 4e, and saddle 2a relative sliding in guiding elongated slot 4d has namely been realized the flexible of mandrel 4.
During trip-out, slush pump quits work, transfer drilling rod descending, 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 during to the lower end of arc chute 4e, stop to transfer drilling rod, change trip-out into, it is up that drilling rod is being carried shell body, and saddle 2a is stuck in the short groove 4f in location again, mandrel 4 is in the retraction shell body, then mud motor and drill bit is mentioned.
The above only is the present invention's better possible embodiments, and is non-so 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 requirement of the present invention.
Claims (4)
1. retraction long stroke hydraulic thruster, comprise that coaxial line and center are equipped with the upper shell of through hole, middle cylindrical shell and lower shell, described upper shell, middle cylindrical shell 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 that spins mutually with drill collar, be inserted with mandrel in the central duct of described shell body from bottom to top, 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 the mandrel shoulder, described mandrel shoulder is supported on the lower port below of described lower shell, and 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 the guiding elongated slot, described guiding elongated slot extends to the mandrel middle part along axis direction, the inwall of cylindrical shell is arranged with saddle in the middle of described, and described saddle is embedded in respectively in the described guiding elongated slot and can relatively moves up and down along the guiding elongated slot; Between the lower end of described upper shell and the upper end of middle cylindrical shell, described in the middle of between the upper end of lower end and described lower shell of cylindrical shell, seal by the sealing ring realization respectively between the inwall of described lower shell and the described mandrel.
2. retraction long stroke hydraulic thruster according to claim 1, it is characterized in that: the below of described guiding elongated slot is connected with respectively arc chute, described arc chute is that cylindrical spiral and lower end are tilted to the right respectively, is respectively equipped with the short groove in location that extends along the mandrel axis direction directly over the described arc chute lower end.
3. retraction long stroke hydraulic thruster according to claim 1, it is characterized in that: the up and down two ends of described saddle are respectively equipped with semicircle head.
4. according to claim 1 and 2 or 3 described retraction long stroke hydraulic thrusters, it is characterized in that: be evenly distributed with a plurality of guiding gutters on the perisporium of described top connection, 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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| CN103362449A true CN103362449A (en) | 2013-10-23 |
| CN103362449B CN103362449B (en) | 2015-11-18 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104533314A (en) * | 2014-12-04 | 2015-04-22 | 刘岩 | Multi-effect lifting pressurizing device for drilling tool |
| CN104863497A (en) * | 2015-04-20 | 2015-08-26 | 中国地质大学（武汉） | Drilling bit spiral impact device |
| CN104895506A (en) * | 2015-05-14 | 2015-09-09 | 西南石油大学 | Flexible feeding short section |
| CN106639897A (en) * | 2015-10-30 | 2017-05-10 | 中石化石油工程技术服务有限公司 | Conversion device for double-flow drill stem down-hole isolation channel |
| CN115538961A (en) * | 2022-11-30 | 2022-12-30 | 胜利油田龙玺石油工程服务有限责任公司 | Mud collection device for well drilling of vehicle-mounted drilling machine |
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| CN201627541U (en) * | 2010-03-04 | 2010-11-10 | 中国石油大学(华东) | Underground drill string vibration reducing and pressurizing device |
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| RU2176304C2 (en) * | 1999-09-06 | 2001-11-27 | ОАО "Ижевский завод нефтяного машиностроения" | Expansion joint |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104533314A (en) * | 2014-12-04 | 2015-04-22 | 刘岩 | Multi-effect lifting pressurizing device for drilling tool |
| CN104863497A (en) * | 2015-04-20 | 2015-08-26 | 中国地质大学（武汉） | Drilling bit spiral impact device |
| CN104895506A (en) * | 2015-05-14 | 2015-09-09 | 西南石油大学 | Flexible feeding short section |
| CN106639897A (en) * | 2015-10-30 | 2017-05-10 | 中石化石油工程技术服务有限公司 | Conversion device for double-flow drill stem down-hole isolation channel |
| CN115538961A (en) * | 2022-11-30 | 2022-12-30 | 胜利油田龙玺石油工程服务有限责任公司 | Mud collection device for well drilling of vehicle-mounted drilling machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103362449B (en) | 2015-11-18 |
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