CN105003248A - Testing method and device of stick-slip vibration parameters of drill string - Google Patents
Testing method and device of stick-slip vibration parameters of drill string Download PDFInfo
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- CN105003248A CN105003248A CN201510290368.0A CN201510290368A CN105003248A CN 105003248 A CN105003248 A CN 105003248A CN 201510290368 A CN201510290368 A CN 201510290368A CN 105003248 A CN105003248 A CN 105003248A
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Abstract
The invention provides a testing method and device of stick-slip vibration parameters of a drill string. The device is mainly comprised of a hydraulic support, a strain gauge, a derrick, a plunger, a motor, a transmission gear, a drill string, a first sliding bearing, a second sliding bearing, a shaft, a moving clamp, a high-speed camera, a monitor window, a drill bit, a sliding support and a slide rail. At the beginning of operation of the device, the motor drives the drill string and the drill bit first to rotate in the shaft, then the plunger is pushed by a hydraulic cylinder to slowly apply drilling pressure to the drill bit, the high-speed camera is used to observe and record rotational law of the drill bit, the strain gauge is used to test the drilling pressure applied to the drill bit, drilling pressures corresponding to bit sticking at different rotational speeds, required time of the drill bit from sticking to re-sliding and transient rotational speed of the drill bit re-starting to slide are therefore acquired, and the stick-slip vibration parameters of the drill string under different drilling conditions are determined. The testing method and device is applicable to the field of research on petroleum and natural gas drilling.
Description
Technical field
The present invention relates to a kind of oil and gas drilling technology field, specifically a kind of method of testing of drill string stick slip vibration parameter and device.
Background technology
Stick slip vibration refers to a kind of phenomenon that drill bit alternately occurs with " viscous " and " slip ", at stick phase, drill bit stops operating and drill string continues to reverse under the driving of top rotatable disc, when drill string reverse the energy put aside be enough to overcome the frictional force and friction torque that drill bit and drill string be subject to time, the drill bit of viscous starts again to slide; In sliding phase, the energy abrupt release of drill string savings, makes the velocity of rotation of drill bit be several times as much as earth's surface rotary speed, thus completes once the process of " viscous " and " slip ".In view of extended reach well have that horizontal movement is large, high angle hole segment length, notable feature that drill string equivalent torsional stiffness is little, and in drilling process, most of drill string almost lies in the low limit of well, thus causes the drill string in extended reach well to be easy to produce stick slip vibration.
Stick slip vibration mainly contains the impact of creeping into: 1) sliding phase high-speed rotation is large to drill bit impact, increases bit wear, accelerates drill bit and loses efficacy; 2) stick slip vibration is little for the energy proportion of broken rock, consumes the energy that well head drive unit provides; 3) fatigue failure of lower drilling tool is accelerated in stick slip vibration itself and other vibrations (as axis, transverse direction, twisting vibration) of causing thereof; 4) stick slip vibration can increase the wearing and tearing of drill string, causes the premature failure of drill string; 5) continuity and wellbore quality are crept in reduction, increase rotating hours and the number of times that makes a trip, and reduce drilling efficiency.Therefore, stick slip vibration is the extremely strong twisting vibration of a kind of destructiveness, in addition, stick slip vibration also can form Xin Said and closes and vibrate with other forms of vibration, the torque ripple produced due to it is larger, not only reducing drilling efficiency, and serious threaten drilling safety, is also a kind of damaging vibration that can not be ignored.
Certainly, for slowing down or avoid the stick slip vibration of drill string in drilling process, scientific worker has proposed the oscillation damping method of a variety of stick slip vibration, mainly comprise two kinds: a kind of is the forms of motion and the characteristics of motion that are solved lower drilling tool by the method for theoretical modeling, then change drilling parameter to slow down or to avoid stick slip vibration; Another kind optimizes drill bit and casing programme or uses downhole tool (as soft formula shock absorber and reverse impactor), but, do not have a kind of method can solve the problem of stick slip vibration completely.Theoretical research shows: determine that the drilling parameter that needs regulate suppresses the key of stick slip vibration in drilling process, and in drilling parameter, 2 parameters had the greatest impact to stick slip vibration are the pressure of the drill and rotating speed, and under a certain the pressure of the drill, there is the critical speed that one stick slip vibration occurs, when rotating speed will disappear higher than stick slip vibration during critical speed, critical speed is relevant with drilling assembly and formation condition etc., because the parameter of different drilling condition is different, therefore the method determination the pressure of the drill be difficult to by theory calculate and rotating speed, but the method by test determines the parameter (as the pressure of the drill and rotating speed etc.) of drill string stick slip vibration, and understand fully stick slip vibration mechanism further.
At present, domestic also do not have the testing arrangement can testing drill string stick slip vibration parameter under actual drilling condition, cannot drilling parameter corresponding to Obtaining Accurate drill string generation stick slip vibration, thus thoroughly can not solve the problem of drill string stick slip vibration, for this reason, the present invention proposes a kind of method of testing and device of drill string stick slip vibration parameter, this device can carry out the simulated test that drill string works under different drilling condition, and the stick slip vibration parameter of Obtaining Accurate drill string under different drilling condition, thus realize the control to drill string stick slip vibration.
Summary of the invention
The object of the invention is, a kind of method of testing and device of drill string stick slip vibration parameter are proposed, to solve different drilling condition lower drill stick slip vibration difficult parameters with the technical barrier of Obtaining Accurate, and while achieving the above object, simplify the complexity of testing arrangement, reduce the cost of testing arrangement.
For achieving the above object, the present invention takes following technical scheme:
The method of testing of described drill string stick slip vibration parameter comprises the following steps:
A) hole angle of derrick and the rotating speed of motor is set.
B) starter motor drives drill string and drill bit to start to rotate in pit shaft, adopts the rotating rule of high-speed camera to drill bit to observe and record simultaneously.
C) adopt fluid cylinder slowly to apply the pressure of the drill to drill bit by plunger and drill string, and utilize strain meter to test the pressure of the drill be applied on drill bit, observe the rotating rule of drill bit simultaneously.
D) slowly the pressure of the drill is increased, until drill bit viscous (stopping operating), the pressure of the drill corresponding during record drill bit viscous.
E) during maintenance drill bit viscous, the rotating speed of corresponding the pressure of the drill and motor is constant, drill string is allowed to continue to rotate under driven by motor, until the drill bit of viscous restart slide, with high-speed camera record drill bit from viscous to slide needed for time and drill bit restart slide moment velocity of rotation (mainly comprise rotating speed, the pressure of the drill, drill bit from viscous to slide time, slide moment velocity of rotation).
F) stop motor, discharge the pressure of the drill be applied on drill bit.
G) hole angle of derrick or the rotating speed of motor is changed, repeat step (1) ~ step (6), the moment velocity of rotation that the pressure of the drill under different hole angle or rotating speed corresponding to drill bit viscous and drill bit restart to again slide required time and drill bit from viscous to slide can be obtained, thus determine the stick slip vibration parameter of drill string under different drilling condition.
For using said method, the invention provides a kind of testing arrangement of drill string stick slip vibration parameter, it is characterized in that, mainly comprise: hydraulic support, strain meter, derrick, plunger, motor, travelling gear, drill string, the first sliding bearing, the second sliding bearing, pit shaft, mobile gripper clamp, high-speed camera, monitoring window, drill bit, core, sliding support and slide rail.Wherein, the fluid cylinder of plunger, motor, the first sliding bearing, the second sliding bearing, pit shaft, mobile gripper clamp is with all to be connected with derrick; Derrick can under the acting in conjunction of hydraulic support and sliding support the anglec of rotation locating, thus creep into simulation under realizing different hole angle (0-90 °); The size of drill string, pit shaft and drill bit is all designed by similarity principle by the casing programme that Oil Field is conventional; Motor is used for providing power to whole testing arrangement, drives drill string (comprising drilling rod, drill collar and downhole tool) and bit; Travelling gear is for transmitting the power of motor; Hydraulic support is fixed on base 1, and Retractable is also located, and sliding support can horizontally slip in slide rail; Fluid cylinder is used for applying the pressure of the drill by plunger and drill string to drill bit, and strain meter is for measuring the pressure of the drill be applied on drill bit; First joint is for connecting drill string and drill bit, and the second joint is for connecting pit shaft and core groove; Mobile gripper clamp can horizontally slip on derrick, for fixing whole pit shaft; First sliding bearing and the second sliding bearing can horizontally slip on derrick, and for positioning whole drill string, drill string can rotate in the first sliding bearing and the second sliding bearing; High-speed camera is observed by monitoring window and records whole test process.
Advantage of the present invention is:
(1) this device can carry out the simulated test of drill string stick slip vibration under different drilling condition, and the stick slip vibration parameter of Obtaining Accurate drill string under different drilling condition, for slowing down or avoiding the stick slip vibration of drill string under different drilling condition to provide important experimental data, simultaneously also for the research of different drilling condition lower drill stick slip vibration mechanism provides comparatively complete intermediate experiment condition;
(2) apparatus structure is simple, easy to operate, with low cost, the process of drill string stick slip vibration in energy real simulation varying level well.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Detailed description of the invention
Below in conjunction with drawings and Examples, describe the present invention.
The method of testing of described drill string stick slip vibration parameter comprises the following steps:
A) hole angle of derrick 4 and the rotating speed of motor 7 is set.
B) starter motor 7 drives drill string 10 and drill bit 17 to start to rotate in pit shaft 12, and the rotating rule simultaneously opening high-speed camera 15 pairs of drill bits 17 is observed and record.
C) adopt fluid cylinder 5 slowly to apply the pressure of the drill to drill bit 17 by plunger 6 and drill string 10, and utilize strain meter 3 to test the pressure of the drill be applied on drill bit 17, observe the rotating rule of drill bit 17 simultaneously.
D) slowly the pressure of the drill is increased, until drill bit 17 viscous (stopping operating), the pressure of the drill corresponding during record drill bit 17 viscous.
E) during maintenance drill bit 17 viscous, the rotating speed of corresponding the pressure of the drill and motor 7 is constant, drill string 10 is allowed to continue to rotate under driven by motor, until the drill bit 17 of viscous restart slide, with high-speed camera 15 record drill bit 17 from viscous to slide needed for time and drill bit 17 restart slide moment velocity of rotation.
F) stop motor 7, discharge the pressure of the drill be applied on drill bit 17.
G) hole angle of derrick 4 or the rotating speed of motor is changed, repeat step (1) ~ step (6), the moment velocity of rotation that the pressure of the drill under different hole angle or rotating speed corresponding to drill bit 17 viscous and drill bit 17 restart to again slide required time and drill bit 17 from viscous to slide can be obtained, thus determine the stick slip vibration parameter of drill string 10 under different drilling condition (mainly comprise rotating speed, the pressure of the drill, drill bit 17 from viscous to the time of sliding, restart the moment velocity of rotation of sliding).
Referring to Fig. 1, for using said method, the invention provides a kind of testing arrangement of drill string stick slip vibration parameter, it is characterized in that, mainly comprise: hydraulic support 2, strain meter 3, derrick 4, plunger 6, motor 7, travelling gear 8, drill string 10, first sliding bearing 9, second sliding bearing 11, pit shaft 12, mobile gripper clamp 13, high-speed camera 15, monitoring window 16, drill bit 17, core 18, sliding support 21 and slide rail 22.Wherein, the fluid cylinder 5 of plunger 6, motor 7, first sliding bearing 9, second sliding bearing 11, pit shaft 12, mobile gripper clamp 13 is with all to be connected with derrick 4; Derrick 4 can under the acting in conjunction of hydraulic support 2 and sliding support 21 anglec of rotation locating, thus creep into simulation under realizing different hole angle (0-90 °); The size of drill string 10, pit shaft 12 and drill bit 17 is all designed by similarity principle by the casing programme that Oil Field is conventional; Motor 7 provides power for giving whole testing arrangement, drives drill string 10 (comprising drilling rod, drill collar and downhole tool) and drill bit 17 to rotate; Travelling gear 8 is for transmitting the power of motor 7; Hydraulic support 2 is fixed on base 1, and Retractable is also located, and sliding support 21 can horizontally slip in slide rail 22; Fluid cylinder 5 is for applying the pressure of the drill to drill bit 17 by plunger 6 and drill string 10, and strain meter 3 is for measuring the pressure of the drill be applied on drill bit 17; First joint 19 is for connecting drill string 10 and drill bit 17, second joint 20 for connecting pit shaft 12 and core groove 14; Mobile gripper clamp 13 can horizontally slip on derrick 4, for fixing whole pit shaft 12; First sliding bearing 9 and the second sliding bearing 11 can horizontally slip on derrick 4, and for positioning whole drill string 10, drill string 10 can rotate in the first sliding bearing 9 and the second sliding bearing 11; High-speed camera 15 is observed by monitoring window 16 and records whole test process.
Claims (2)
1. the testing arrangement of a drill string stick slip vibration parameter, it is characterized in that, mainly comprise: hydraulic support (2), strain meter (3), derrick (4), plunger (6), motor (7), travelling gear (8), drill string (10), the first sliding bearing (9), the second sliding bearing (11), pit shaft (12), mobile gripper clamp (13), high-speed camera (15), monitoring window (16), drill bit (17), core (18), sliding support (21) and slide rail (22); Wherein, the fluid cylinder (5) of plunger (6), motor (7), the first sliding bearing (9), the second sliding bearing (11), pit shaft (12), mobile gripper clamp (13) is with all to be connected with derrick (4); Derrick (4) can under the acting in conjunction of hydraulic support (2) and sliding support (21) anglec of rotation locating, thus creep into simulation under realizing different hole angle (0-90 °); The size of drill string (10), pit shaft (12) and drill bit (17) is all designed by similarity principle by the casing programme that Oil Field is conventional; Motor (7) provides power for giving whole testing arrangement, drives drill string (10) (comprising drilling rod, drill collar and downhole tool) and drill bit (17) to rotate; Travelling gear (8) is for transmitting the power of motor (7); Hydraulic support (2) is fixed on base (1), and Retractable is also located, and sliding support (21) can horizontally slip in slide rail (22); Fluid cylinder (5) is for applying the pressure of the drill by plunger (6) and drill string (10) to drill bit (17), and strain meter (3) is for measuring the pressure of the drill be applied on drill bit (17); First joint (19) is for connecting drill string (10) and drill bit (17), and the second joint (20) is for connecting pit shaft (12) and core groove (14); Mobile gripper clamp (13) can horizontally slip on derrick (4), for fixing whole pit shaft (12); First sliding bearing (9) and the second sliding bearing (11) can horizontally slip on derrick (4), for positioning whole drill string (10), drill string (10) can rotate in the first sliding bearing (9) and the second sliding bearing (11); High-speed camera (15) is observed by monitoring window (16) and records whole test process.
2. testing arrangement according to claim 1, a kind of method of testing of drill string stick slip vibration parameter, is characterized in that:
A) hole angle of derrick (4) and the rotating speed of motor (7) is set;
B) starter motor (7) drives drill string (10) and drill bit (17) to start to rotate in pit shaft (12), opens the rotating rule of high-speed camera (15) to drill bit (17) simultaneously and observes and record;
C) fluid cylinder (5) is adopted slowly to apply the pressure of the drill to drill bit (17) by plunger (6) and drill string (10), and utilize strain meter (3) to test the pressure of the drill be applied on drill bit (17), observe the rotating rule of drill bit (17) simultaneously;
D) slowly the pressure of the drill is increased, until drill bit (17) viscous (stopping operating), the pressure of the drill corresponding during record drill bit (17) viscous;
E) during maintenance drill bit (17) viscous, the rotating speed of corresponding the pressure of the drill and motor (7) is constant, drill string (10) is allowed to continue to rotate under driven by motor, until the drill bit of viscous (17) restart slide, with high-speed camera (15) record drill bit (17) from viscous to slide needed for time and drill bit (17) restart slide moment velocity of rotation;
F) stop motor (7), discharge the pressure of the drill be applied on drill bit (17);
G) hole angle of derrick (4) or the rotating speed of motor is changed, repeat step (1) ~ step (6), the moment velocity of rotation that the pressure of the drill under different hole angle or rotating speed corresponding to drill bit (17) viscous and drill bit (17) restart from viscous to again slide required time and drill bit (17) to slide can be obtained, thus determine the stick slip vibration parameter of drill string (10) under different drilling condition, mainly comprise rotating speed, the pressure of the drill, drill bit (17) from viscous to slide needed for time, restart slide moment velocity of rotation.
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| CN201510290368.0A CN105003248B (en) | 2015-06-01 | 2015-06-01 | The method of testing and device of a kind of drill string stick slip vibration parameter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107450322A (en) * | 2017-09-04 | 2017-12-08 | 中国地质大学（武汉） | The stick slip vibration suppressing method and system of DRILL-STRING SYSTEM based on neutral model |
| CN109162692A (en) * | 2018-08-29 | 2019-01-08 | 北京四利通控制技术股份有限公司 | A kind of soft torque control system and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107450322A (en) * | 2017-09-04 | 2017-12-08 | 中国地质大学（武汉） | The stick slip vibration suppressing method and system of DRILL-STRING SYSTEM based on neutral model |
| CN107450322B (en) * | 2017-09-04 | 2019-09-17 | 中国地质大学（武汉） | The stick slip vibration suppressing method and system of DRILL-STRING SYSTEM based on neutral model |
| CN109162692A (en) * | 2018-08-29 | 2019-01-08 | 北京四利通控制技术股份有限公司 | A kind of soft torque control system and method |
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| CN105003248B (en) | 2017-09-29 |
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Granted publication date: 20170929 Termination date: 20190601 |