CN107560999B - Full-size aluminum alloy drilling rod dynamic corrosion experiment table - Google Patents
Full-size aluminum alloy drilling rod dynamic corrosion experiment table Download PDFInfo
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- CN107560999B CN107560999B CN201710803157.1A CN201710803157A CN107560999B CN 107560999 B CN107560999 B CN 107560999B CN 201710803157 A CN201710803157 A CN 201710803157A CN 107560999 B CN107560999 B CN 107560999B
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention discloses a full-size aluminum alloy drill rod dynamic corrosion experiment table which comprises a base and a damping pump, wherein an experiment kettle is arranged on the base, an analog shaft is arranged in the experiment kettle, an experiment drill rod is arranged in the analog shaft, a drill rod transmission joint is arranged at one end of the experiment drill rod, a motor is arranged at the outer end of the drill rod transmission joint, a sealing gland is arranged on the outer wall of the drill rod transmission joint, and an axial force transmission joint is arranged at the other end of the experiment drill rod. The beneficial effects are that: by constructing a simulated service environment of high temperature-high pressure-mechanics-chemistry of a scientific ultra-deep well aluminum alloy drill rod, by dynamic corrosion experiments and failure analysis thereof, the corrosion behavior characteristics of the aluminum alloy drill rod are captured, and the corrosion rule and failure mechanism of the aluminum alloy drill rod under the multi-factor synergistic effect are revealed; on the basis, a corrosion mechanism is disclosed, and a protection mechanism is explored, so that the optimization of the aluminum alloy drill rod technology is realized, and the aluminum alloy drill rod with longer service life and high reliability is designed and manufactured.
Description
Technical Field
The invention relates to the technical field of deep drilling aluminum alloy drill pipes, in particular to a full-size aluminum alloy drill pipe dynamic corrosion experiment table.
Background
Drill pipe is the most dominant and most easily damaged component of the drilling tool. The drill string is composed of drill rods and is used for delivering torque and drilling pressure, conveying flushing fluid and extracting core, replacing drill bits, handling accidents and the like. In the drilling process, the drill string movement state is very complex, and mainly comprises: rotation, whirl, longitudinal vibration, torsional vibration, transverse vibration, and the like. Complex conditions cause drill string failure to be one of the most common and costly well accidents during drilling operations. Especially in scientific ultra-deep well drilling, the performance of the drill rod is more important.
In the process of scientific ultra-deep well drilling operation, besides the complicated and uncertain stratum conditions, the difficulties and challenges to be encountered by the well drilling machine can be summarized into heat, high, long and big, namely high well temperature, high pressure, long pipe column and big well diameter, and the conventional drilling machine is difficult to meet the drilling requirements, such as low construction efficiency, long period, high cost and energy consumption, difficult to ensure the drilling safety and even cannot be implemented; especially when the drilling well exceeds a certain depth, the dead weight of the drill string can damage the drill rod, and along with the continuous increase of the well depth, the drilling engineering has the characteristics of long open hole section, poor well wall stability, high environment temperature in the well, high formation pressure, poor drillability of deep rocks and the like, and brings a series of drilling technical problems. The aluminum alloy drill rod has the unique advantages of light weight, high specific strength, large drilling depth, small energy consumption and the like, and becomes a preferable scheme for the design of a scientific ultra-deep well drill column.
Although the aluminum alloy drill rod shows excellent technical advantages, the defects of the existing aluminum alloy drill rod technology are deeply analyzed, and the aluminum alloy drill rod is a necessary premise and an important foundation for realizing design and manufacture of the aluminum alloy drill rod with long service life and high reliability. Aluminum alloy faces serious corrosion problems like other metals, and the drill rod is extremely easy to be corroded and failed due to complex service working conditions. Therefore, in the process of design optimization of the aluminum alloy drill rod, various experiments are required to be verified, the existing experimental platform is simple in structure and single in detection performance, although the test results can intuitively and quantitatively reflect the corrosion resistance of the aluminum alloy under the normal temperature and normal pressure conditions, the defect that the test results cannot completely reflect the service performance of the aluminum alloy drill rod under the actual drilling working condition is overcome, and experimental data used in the process of optimizing the design are not representative and realistic.
Disclosure of Invention
The invention aims to solve the problems and provide a full-size aluminum alloy drill rod dynamic corrosion experiment table.
The invention realizes the above purpose through the following technical scheme:
the utility model provides a full-size aluminum alloy drilling rod dynamic corrosion laboratory bench, includes base, damping pump, be provided with the experiment cauldron on the base, the inside simulation pit shaft that is provided with of experiment cauldron, the inside experimental drilling rod that is provided with of simulation pit shaft, experimental drilling rod one end is provided with the drilling rod transmission joint, drilling rod transmission joint outer end is provided with the motor, be provided with gland on the drilling rod transmission joint outer wall, the experimental drilling rod other end is provided with axial force transmission joint, be provided with the pulling force transmission piece on the axial force transmission joint outer wall, the axial force transmission joint outer end is provided with the pressure transmission piece, the pressure transmission piece lateral surface is provided with the linear pump, the axial force transmission joint right-hand member with the damping pump links to each other, be provided with the resistance wire on the simulation pit shaft outer wall, be provided with temperature sensor on the experiment cauldron inner wall, the temperature sensor next door is provided with pressure sensor, be provided with the confluence cover on the experiment cauldron outer wall, the confluence cover is provided with drilling fluid through the pipe connection and prepares the case, the drilling fluid is prepared the case and is connected with the pressure adjustment pump, the pressure adjustment pump is connected to on the experiment cauldron.
In this embodiment, the motor is fixed on the base through the screw, the power output shaft of motor pass through the drive key with drilling rod drive joint links together, drilling fluid circulation passageway is provided with inside drilling rod drive joint one end.
In this embodiment, sealing gland pass through the bolt assembly with experimental cauldron is together fixed, sealing gland with the inside shaft hole cooperation of experimental cauldron one end is connected, sealing gland nestification is in the drilling rod drive joint is outside, sealing gland is last the shaping have with the inside passageway intercommunication of drilling rod drive joint through-hole.
In this embodiment, the drilling rod drive joint with all be provided with the bearing between the experimental kettle, the drilling rod drive joint with between the gland, the drilling rod drive joint with be provided with the sealing washer on the experimental kettle contact surface.
In this embodiment, the simulation pit shaft is settled inside the experimental kettle, the pulling force transmission piece is propped up on the outer terminal surface of simulation pit shaft, the axial force transmission joint with the inside shaft hole cooperation of pulling force transmission piece is connected, the pulling force transmission piece with the experimental kettle with all be provided with the sealing washer on the axial force transmission joint contact surface.
In this embodiment, the pressure transmission member is mounted at the outer end of the pressure transmission member by threads, and the bearings are disposed between the axial force transmission joint and the tension transmission member, and between the axial force transmission joint and the pressure transmission member.
In this embodiment, the damping pump is composed of a damping pump stator, a damping pump rotor, and a damping pump rotary vane.
In this embodiment, the damping pump applies torque to the rotating drill pipe; the damping pump rotor is connected with the right end of the axial force transmission joint; the damping pump stator is fixed in the pressure transmission piece through a right square step at the right end of the damping pump stator and realizes circumferential positioning; the change of the cavity volume is realized through the rotation of the damping pump rotary vane; the hydraulic oil suction and discharge channels are formed through the through holes in the damping pump stator and the pressure transmission piece, and the high-pressure cavity and the low-pressure cavity are effectively separated by arranging a sealing ring between the outer surface of the damping pump stator and the inner surface of the pressure transmission piece; the torque value of the damping pump rotor is changed by adjusting the pressure of the discharge port, so that the torque value acting on the drill rod is controlled.
In this embodiment, the cover parcel that converges is in on the experimental kettle outer wall, be located the position of cover parcel that converges experimental kettle position is provided with the through-hole that runs through the experimental kettle is inside.
In this embodiment, a flow regulating valve is disposed on a pipe between the drilling fluid preparation tank and the pressure regulating pump.
In this embodiment, an accumulator is provided on a pipe through which the pressure regulating pump is connected to the experimental kettle.
In the embodiment, the simulation shaft and the drill rod joint on the experiment table are exchanged in different sizes to simulate drilling of various specifications, so that corrosion experiments suitable for drill rods of various specifications are realized.
The invention has the beneficial effects that: by designing a full-size dynamic corrosion experiment table for the aluminum alloy drill rod, constructing a simulated service environment of high temperature-high pressure-mechanics-chemistry of the aluminum alloy drill rod, and by corrosion experiments and failure analysis thereof, mainly capturing dynamic corrosion behavior characteristics of the aluminum alloy drill rod and revealing corrosion rules and failure mechanisms of the aluminum alloy drill rod under the synergistic effect of multiple factors; on the basis, a corrosion mechanism is disclosed, a protection mechanism is explored, so that optimization of an aluminum alloy drill rod technology is realized, an aluminum alloy drill rod with longer service life and high reliability is designed and manufactured, basic experimental data are provided for the planning and implementation of future universal meter scientific drilling engineering in China, and theoretical support and technical support are provided for meeting the further advancing crust detection engineering plan in China.
Drawings
FIG. 1 is a schematic diagram of a full-size aluminum alloy drill rod dynamic corrosion experiment table according to the invention;
FIG. 2 is an external view of a full-size aluminum alloy drill pipe dynamic corrosion laboratory bench according to the present invention;
FIG. 3 is a diagram of simulated wellbore construction of a full-size aluminum alloy drill pipe dynamic corrosion laboratory bench according to the present invention.
FIG. 4 is a diagram of the damping pump structure of the full-size aluminum alloy drill rod dynamic corrosion experiment table.
The reference numerals are explained as follows:
1. a motor; 2. a sealing gland; 3. a bolt assembly; 4. a transmission key; 5. a drill pipe drive joint; 6. a bearing; 7. an experimental kettle; 8. simulating a wellbore; 9. testing a drill rod; 10. a resistance wire; 11. a temperature sensor; 12. a pressure sensor; 13. an axial force transmission joint; 14. a tension transmitting member; 15. a pressure transmitting member; 16. a linear pump; 17. a base; 18. a confluence cover; 19. a drilling fluid preparation box; 20. a flow regulating valve; 21. a pressure regulating pump; 22. an accumulator; 23. a damping pump; 23-1, a damping pump stator; 23-2, damping the pump rotor; 23-3, damping the pump rotor.
Description of the embodiments
The invention is further described below with reference to the accompanying drawings:
as shown in fig. 1-3, a full-size aluminum alloy drill rod dynamic corrosion experiment table comprises a base 17 and a damping pump 23, wherein the base 17 is provided with an experiment kettle 7, the base 17 is used for fixedly supporting, the experiment kettle 7 provides a closed space for corrosion experiment of an internal drill rod, the experiment kettle 7 is internally provided with a simulated shaft 8, the inner wall of the simulated shaft 8 is used for simulating a well wall, the simulated shaft 8 is internally provided with a test drill rod 9, one end of the test drill rod 9 is provided with a drill rod transmission joint 5, the drill rod transmission joint is used for transmitting power, the outer end of the drill rod transmission joint 5 is provided with a motor 1, the motor 1 is used for providing power to drive the drill rod to rotate, the outer wall of the drill rod transmission joint 5 is provided with a sealing gland 2, the sealing gland 2 is used for sealing the end part of the experiment kettle 7, the other end of the test drill rod 9 is provided with an axial force transmission joint 13, the axial force transmission joint 13 is used for transmitting axial force and damping torque, the outer wall of the axial force transmission joint 13 is provided with a tension transmission piece 14, the tension transmission piece 14 is used for transmitting tension from the linear pump 16, the outer end of the axial force transmission joint 13 is provided with a pressure transmission piece 15, the pressure transmission piece 15 is used for transmitting pressure from the linear pump 16, the outer side surface of the pressure transmission piece 15 is provided with the linear pump 16, the linear pump 16 is used for providing axial tension and pressure, the right end of the axial force transmission joint 13 is connected with the damping pump 23, the damping torque generated by the damping pump 23 acts on the drill rod through the axial force transmission joint 13, the outer wall of the simulation well bore 8 is provided with the resistance wire 10, the resistance wire 10 is used for heating and adjusting the temperature inside the experimental kettle 7, the temperature sensor 11 is arranged on the inner wall of the experimental kettle 7, the temperature sensor 11 is used for detecting the temperature inside the experimental kettle 7, the pressure sensor 12 is arranged beside the temperature sensor 11, the pressure sensor 12 is used for detecting the pressure inside the experimental kettle 7, the confluence cover 18 is arranged on the outer wall of the experimental kettle 7, the confluence cover 18 is used for converging drilling fluid for convenient backflow, the confluence cover 18 is connected with the drilling fluid preparation box 19 through a pipeline, the drilling fluid preparation box 19 is used for preparing drilling fluid, the drilling fluid preparation box 19 is connected with the flow control valve 20 through a pipeline, the flow control valve 20 is used for controlling the flow of the drilling fluid flowing through an annulus, the pressure control pump 21 is connected with the pressure control valve 20 through a pipeline, the pressure control pump 21 is used for controlling the pressure of the drilling fluid flowing through the annulus, and the pressure control pump 21 is connected with the experimental kettle 7 through a pipeline, so that the drilling fluid preparation box 19 forms a complete circulation loop.
In this embodiment, the motor 1 is fixed on the base 17 by a screw, a power output shaft of the motor 1 is fixedly connected with the drill rod transmission joint 5 by a transmission key 4, and a drilling fluid circulation channel is arranged inside one end of the drill rod transmission joint 5.
In this embodiment, gland 2 pass through bolt assembly 3 with experimental cauldron 7 fixed connection, gland 2 with the inside shaft hole cooperation of experimental cauldron 7 one end is connected, gland 2 with the outside shaft hole cooperation of drill rod drive joint 5 is connected, the shaping on the gland 2 have with the through-hole of drill rod drive joint 5 internal passageway intercommunication.
In this embodiment, the bearings 6 are disposed between the drill pipe transmission joint 5 and the experimental kettle 7, and between the drill pipe transmission joint 5 and the sealing gland 2, and a sealing ring is disposed on a contact surface of the drill pipe transmission joint 5 and the experimental kettle 7.
In this embodiment, the simulation pit shaft 8 is disposed inside the experimental kettle 7, the tension transmitting member 14 is propped against the outer end surface of the simulation pit shaft 8, the axial force transmitting connector 13 is connected with the shaft hole inside the tension transmitting member 14 in a matched manner, and sealing rings are disposed on contact surfaces of the tension transmitting member 14, the experimental kettle 7 and the axial force transmitting connector 13.
In this embodiment, the pressure transmission member 15 is screwed to the outer end of the tension transmission member 14, and the bearing 6 is disposed between the axial force transmission joint 13 and the tension transmission member 14, and between the axial force transmission joint 13 and the pressure transmission member 15.
In this embodiment, the damping pump 23 is composed of a damping pump stator 23-1, a damping pump rotor 23-2, and a damping pump rotary vane 23-3.
In this embodiment, the damping pump 23 applies torque to the rotating drill rod; wherein, the damping pump rotor 23-2 is connected with the right end of the axial force transmission joint 13; the damping pump stator 23-1 is fixed in the pressure transmission member 15 through a right square step thereof and realizes circumferential positioning; the change of the cavity volume is realized through the rotation of the damping pump rotary vane 23-3; the suction and discharge channels of hydraulic oil are formed through the through holes in the damping pump stator 23-1 and the pressure transmission member 15, and the effective separation of the high-pressure cavity and the low-pressure cavity is realized by arranging a sealing ring between the outer surface of the damping pump stator 23-1 and the inner surface of the pressure transmission member 15; the damping torque of the damping pump rotor 23-2 is changed by adjusting the pressure of the discharge port, thereby realizing the control of the torque value acting on the drill rod.
In this embodiment, the confluence cover 18 is wrapped on the outer wall of the experimental kettle 7, and a through hole penetrating through the experimental kettle 7 is formed in a position where the confluence cover 18 wraps the experimental kettle 7.
In this embodiment, the flow rate regulating valve 20 is disposed on a pipe between the drilling fluid preparation tank 19 and the pressure regulating pump 21, and the flow rate regulating valve 20 is used to control the flow rate of the drilling fluid flowing through the annulus.
In this embodiment, the accumulator 22 is disposed on a pipeline that the pressure regulating pump 21 is connected to the experimental kettle 7, and the accumulator 22 is used for reducing the pulsation amplitude of drilling fluid pressure.
In the above structure, the simulated well bore 8 with proper size is matched with a drill rod to simulate an underground annulus, the pressure and the flow rate of drilling fluid flowing through the annulus are controlled by the pressure regulating pump 21 and the flow regulating valve 20, the components of the drilling fluid are regulated and controlled by the drilling fluid preparation box 19, the energy accumulator 22 is used for reducing the pulsation amplitude of the drilling fluid pressure, the resistance wire 10 heats to realize the control of the temperature in the experimental kettle 7, the temperature sensor 11 and the pressure sensor 12 are used for monitoring the temperature and the pressure in the simulated well bore 8, the temperature and the pressure are controlled conveniently, the motor 1 drives the test drill rod 9 to rotate by the drill rod transmission joint 5, the linear pump 16 provides an axial force for the test drill rod 9, the damping pump 23 provides a damping torque for the test drill rod 9, so as to simulate the movement and the stress situation of the drill rod under the actual working condition, and finally the corrosion situation of the test drill rod 9 under different service environments is analyzed to research the corrosion mechanism with higher theoretical use performance is researched.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and their equivalents.
Claims (8)
1. A full-size aluminum alloy drilling rod dynamic corrosion laboratory bench, its characterized in that: the experimental device comprises a base and a damping pump, wherein an experimental kettle is arranged on the base, an analog shaft is arranged in the experimental kettle, a test drill rod is arranged in the analog shaft, a drill rod transmission joint is arranged at one end of the test drill rod, a motor is arranged at the outer end of the drill rod transmission joint, a sealing gland is arranged on the outer wall of the drill rod transmission joint, an axial force transmission joint is arranged at the other end of the test drill rod, a tension transmission piece is arranged on the outer wall of the axial force transmission joint, a pressure transmission piece is arranged at the outer end of the axial force transmission joint, a linear pump is arranged on the outer side of the pressure transmission piece, the right end of the axial force transmission joint is connected with the damping pump, a resistance wire is arranged on the outer wall of the analog shaft, a temperature sensor is arranged on the inner wall of the experimental kettle, a confluence cover is arranged on the outer wall of the experimental kettle, a drilling fluid preparation box is connected with the pressure regulation pump through a pipeline, and the pressure regulation pump is connected to the experimental kettle; the motor is fixed on the base through a screw, a power output shaft of the motor is connected with the drill rod transmission joint through a transmission key, and a drilling fluid circulation channel is formed in one end of the drill rod transmission joint; bearings are arranged between the drill rod transmission joint and the experimental kettle and between the drill rod transmission joint and the sealing gland, and sealing rings are arranged on the contact surfaces of the drill rod transmission joint and the experimental kettle.
2. The full-size aluminum alloy drill pipe dynamic corrosion experiment table according to claim 1, wherein: the sealing gland is fixed with the experimental kettle through a bolt assembly, the sealing gland is connected with an inner shaft hole at one end of the experimental kettle in a matched mode, the sealing gland is nested outside the drill rod transmission joint, and a through hole communicated with an inner channel of the drill rod transmission joint is formed in the sealing gland.
3. The full-size aluminum alloy drill pipe dynamic corrosion experiment table according to claim 1, wherein: the experimental kettle is characterized in that the simulated shaft is arranged inside the experimental kettle, the tension transmission piece is propped against the outer end face of the simulated shaft, the axial force transmission joint is connected with the shaft hole of the tension transmission piece in a matched mode, and sealing rings are arranged on the contact surfaces of the tension transmission piece, the experimental kettle and the axial force transmission joint.
4. The full-size aluminum alloy drill pipe dynamic corrosion experiment table according to claim 1, wherein: the pressure transmission piece is installed at the outer end of the tension transmission piece through threads, and bearings are arranged between the axial force transmission joint and the tension transmission piece and between the axial force transmission joint and the pressure transmission piece.
5. The full-size aluminum alloy drill pipe dynamic corrosion experiment table according to claim 1, wherein: the damping pump consists of a damping pump stator, a damping pump rotor and a damping pump rotary vane.
6. The full-size aluminum alloy drill pipe dynamic corrosion experiment table according to claim 1, wherein: the experiment kettle is characterized in that the confluence cover is wrapped on the outer wall of the experiment kettle, and through holes penetrating through the inside of the experiment kettle are formed in the position of the confluence cover wrapping.
7. The full-size aluminum alloy drill pipe dynamic corrosion experiment table according to claim 1, wherein: and a flow regulating valve is arranged on a pipeline between the drilling fluid preparation box and the pressure regulating pump.
8. The full-size aluminum alloy drill pipe dynamic corrosion experiment table according to claim 1, wherein: the pressure regulating pump is communicated with the pipeline on the experimental kettle and is provided with an energy accumulator, the simulated shaft and the drill rod joint can be exchanged in different sizes, drilling of various specifications is simulated, and accordingly corrosion experiments suitable for drill rods of various specifications are achieved.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710803157.1A CN107560999B (en) | 2017-09-08 | 2017-09-08 | Full-size aluminum alloy drilling rod dynamic corrosion experiment table |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710803157.1A CN107560999B (en) | 2017-09-08 | 2017-09-08 | Full-size aluminum alloy drilling rod dynamic corrosion experiment table |
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| CN107560999A CN107560999A (en) | 2018-01-09 |
| CN107560999B true CN107560999B (en) | 2023-08-11 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109406257B (en) * | 2018-12-20 | 2020-12-22 | 吉林大学 | Experimental device for mechanical properties of drill pipe joint under analysis high temperature high pressure drilling environment |
| CN112903469B (en) * | 2019-11-19 | 2024-04-26 | 中国石油化工股份有限公司 | Testing device for downhole tool |
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| JP2012103160A (en) * | 2010-11-11 | 2012-05-31 | Mitsubishi Heavy Ind Ltd | Stress corrosion crack test device |
| CN102680176A (en) * | 2012-05-24 | 2012-09-19 | 中国石油天然气集团公司 | Real stress corrosion testing machine for tubes |
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