CN111456717A - Vibration absorption and pressurization coupler - Google Patents
Vibration absorption and pressurization coupler Download PDFInfo
- Publication number
- CN111456717A CN111456717A CN201910050797.9A CN201910050797A CN111456717A CN 111456717 A CN111456717 A CN 111456717A CN 201910050797 A CN201910050797 A CN 201910050797A CN 111456717 A CN111456717 A CN 111456717A
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- China
- Prior art keywords
- central shaft
- coupler
- outer shell
- valve seat
- vibration
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
Abstract
The invention relates to a vibration absorption and pressurization coupler in the field of underground drilling tools, which mainly comprises an upper joint, a central shaft, an outer shell, a sealing device, a spline pair, a central hole, a spring, an upper valve seat, a pressure transfer hole, a lower valve seat and a lower joint. The vibration absorption supercharging coupler is arranged between the single-bending power drilling tool and the measurement and control instrument while drilling, can protect the damage of the vibration of the single-bending power drilling tool to the precise measurement and control instrument while drilling, can convert high hydraulic pressure generated when the single-bending power drilling tool is rotationally braked into pulsating impact force, is applied to a drill bit, assists in improving rock breaking efficiency, and is a novel tool with simple structure, convenient operation, low cost, safety and reliability.
Description
Technical Field
The invention relates to a well drilling downhole tool in the field of petroleum and natural gas well drilling, coal bed gas well drilling, geological exploration and mine drilling devices, in particular to a vibration absorption and pressurization coupler.
Background
In the fields of petroleum and natural gas drilling, geological exploration, mine drilling and the like, a single-bend power drilling tool and a precise wireless measurement and control while drilling instrument are the most common downhole tools for drilling wells with complex structures at home and abroad at present, the output end of the single-bend power drilling tool is connected with a drill bit, the drill bit is driven to rotate to break rocks under the action of drilling fluid, and the input end of the single-bend power drilling tool is connected with the wireless measurement and control while drilling instrument. In the drilling process, due to the influences of factors such as rock stratum heterogeneity and borehole wall irregularity, the single-bend power drilling tool can generate violent vibration when the driving drill bit rotates to break rock, so that the stability of a precise wireless measurement and control instrument while drilling is influenced, even internal components are damaged and cannot be repaired, the single-bend power drilling tool is also subjected to rotary braking, the pressure of a ground pump is increased sharply, the pump is held back, and the drilling efficiency is seriously influenced. The research and analysis of domestic and foreign data show that the drilling process of 'drill bit + single-bend power drilling tool + wireless measurement and control while drilling' does not have relevant tool equipment for solving the problems at present.
Disclosure of Invention
The invention aims to reduce the vibration of a single-bending power drilling tool to the maximum extent, protect a precise wireless measurement and control instrument while drilling, avoid a pump hold-down caused by high hydraulic pressure when the single-bending power drilling tool is braked by rotation, simultaneously convert the high hydraulic pressure into pulse impact force applied to a drill bit, assist in improving the rock breaking efficiency of the drill bit, further improve the drilling construction operation efficiency, reduce the cost, improve the borehole quality and improve the underground safety, and provides a vibration absorption pressurizing coupler for the fields of petroleum and natural gas drilling, geological exploration and mine drilling.
The technical scheme of the invention is as follows:
a vibration-absorbing boost coupler comprising a central shaft, an outer housing, wherein: the central shaft is axially provided with a central hole, the outer wall of the central shaft is axially provided with a spline pair and a lower boss at intervals, the bottom of the central shaft is upwards provided with a section of pressure transfer hole, and the pressure transfer hole extends to the upper end face of the lower boss; the outer shell is sleeved outside a central shaft below the upper joint, the upper end part of the outer shell keeps a certain interval with the bottom of the upper joint, spline grooves, an upper valve seat and a lower valve seat are axially arranged on the inner wall of the outer shell at intervals, the spline grooves and a spline pair on the central shaft form axial sliding fit, the lower end surface of the upper valve seat and the upper end surface of a lower boss of the central shaft form barrier fit, and a spring B is sleeved in an annular space between the lower valve seat and an outer boss of the central shaft; the central shaft and the outer shell form axial sliding sealing fit.
The above scheme further comprises:
one or more upper bosses are arranged on the outer wall between the lower boss of the central shaft and the spline pair, one or more inner bosses are arranged on the inner wall of the outer shell corresponding to the upper bosses, and a spring is sleeved in an annular space between the lower part of the upper bosses of the central shaft and the inner bosses of the outer shell.
The pressure transmission hole of the central shaft lower boss is inclined upwards to the upper end face.
And a filtering device is arranged at the inlet of the pressure transmission hole.
The upper end of the central shaft is connected with an upper joint, the bottom of the upper joint keeps a certain interval with the upper end of the outer shell, and the lower joint is arranged at the lower end of the outer shell.
The central shaft and the outer shell form axial sliding sealing fit through a sealing device.
The sealing device comprises a sealing device A arranged between the central shaft and the top of the outer shell, and a sealing device C and a sealing device D arranged between the upper valve seat, the lower valve seat and the central shaft.
And lubricating oil is filled in the annular space where the spline pair and the spring are located.
The vibration absorption pressurizing coupler disclosed by the invention can protect the damage of the vibration of the single-bend power drilling tool to the wireless measurement and control instrument while drilling, can buffer high hydraulic pressure generated when the single-bend power drilling tool is rotationally braked, avoids the occurrence of pump holding and pump stopping, simultaneously meets the technical requirements and equipment requirements of the existing drilling process, and is simple in structure, low in cost and convenient to operate and maintain.
Drawings
Fig. 1 is a sectional view of the structure of the vibration-absorbing boost coupler of the present invention.
In the figure: 1-upper joint, 2-central shaft, 3-outer shell, 4-sealing device A, 5-spline pair, 6-central hole, 7-sealing device B, 8-spring A, 9-sealing device C, 10-upper valve seat, 11-pressure transmitting hole, 12-spring B, 13-sealing device D, 14-lower valve seat and 15-lower joint.
Detailed Description
The present invention is described in detail below with reference to the attached drawings.
Embodiment 1, referring to fig. 1, a vibration-absorbing boost coupler includes a central shaft 2 and an outer housing 3, wherein: the center shaft 2 is axially provided with a center 6, the outer wall of the center shaft 2 is axially provided with a spline pair 5 and a lower boss at intervals, the bottom of the center shaft 2 is upwards provided with a section of pressure transfer hole 11, and the pressure transfer hole 11 extends to the upper end face of the lower boss; the outer shell 3 is sleeved outside the central shaft 2 below the upper joint 1, the upper end part of the outer shell 3 keeps a certain interval with the bottom of the upper joint 1, the inner wall of the outer shell 3 is axially provided with spline grooves, an upper valve seat 10 and a lower valve seat 14 at intervals, the spline grooves and the spline pairs 5 on the central shaft 2 form axial sliding fit, the lower end surface of the upper valve seat 10 and the upper end surface of the lower boss of the central shaft 2 form blocking fit, and a spring B12 is sleeved in an annular space between the lower valve seat 14 and the outer boss of the central shaft 2; the central shaft 2 and the outer shell 3 form axial sliding sealing fit.
The embodiment 1 can adopt a single spring and valve seat combined structure, and is suitable for geological layers with small underground vibration.
In embodiment 2, on the basis of embodiment 1, one or more upper bosses are further arranged on the outer wall between the lower boss of the central shaft 2 and the spline pair 5, one or more inner bosses are also arranged on the inner wall of the outer shell 3 corresponding to the upper boss, and a spring is sleeved in an annular space between the lower part of the upper boss of the central shaft 2 and the inner bosses of the outer shell 3. A double spring shock-absorbing structure is shown in figure 1.
The pressure transmission hole 11 of the lower boss of the central shaft 2 is inclined upwards to the upper end surface.
And a filtering device, preferably a filter screen or a filter valve, is arranged at the inlet of the pressure transmission hole 11.
The upper end of the central shaft 2 is connected with an upper joint 1, the bottom of the upper joint 1 keeps a certain interval with the upper end of the outer shell 3, the interval length meets the maximum expansion variable of the spring, and the lower end of the outer shell 3 is provided with a lower joint 15.
The central shaft 2 and the outer shell 3 form axial sliding sealing fit through a sealing device.
The sealing means comprise mounting sealing means a4, B7 arranged between the central shaft 2 and the top of the outer housing 3 and sealing means C9, D13 arranged between the upper 10, lower 14 and central shaft 2.
And lubricating oil is filled in the annular space where the spline pair 5 and the spring are located.
The central shaft 2 is provided with an upper boss and a lower boss, an inner hole of the outer shell 3 is provided with an upper valve seat 10 and a lower valve seat 14 which are of two boss structures, the upper valve seat 10 is arranged above the lower boss of the central shaft 2, a spring A8 is arranged between the upper valve seat 10 and the upper boss of the central shaft 2, and a spring B12 is arranged between the lower valve seat 14 and the lower boss of the central shaft 2. The inner wall of the central shaft 2 is provided with a pressure transmission hole 11, the pressure transmission hole 11 is a through hole and is communicated with the bottom of the upper valve seat 10 and the bottom of the lower valve seat 14, one end of the pressure transmission hole 11 is opened at the bottom of the central shaft 2, and the other end of the pressure transmission hole is opened between the upper valve seat 10 and the lower boss of the central shaft 2. The pressure transmission hole 11 at the bottom of the upper valve seat 10 is inclined to facilitate the discharge of rock debris, and a filtering device is arranged at the inlet of the pressure transmission hole 11.
A sealing device A4 and a sealing device 7 are installed between the central shaft 2 and the outer shell 3, and the spline pair 5 is located between a sealing device A4 and a sealing device B7; a sealing device C9 is arranged between the upper valve seat 10 and the upper boss of the central shaft 2, and a sealing device D13, preferably a sealing ring or a sealing ring, is arranged between the lower valve seat 14 and the lower boss of the central shaft 2. The space between the sealing device A4 and the sealing device B7 is filled with lubricating oil; the space between the upper valve seat 10 and the boss on the central shaft 2 is filled with lubricating oil.
The upper valve seat 10 and the lower valve seat 14 may be provided with a plurality of sets (equal to the inner bosses in the technical solution), the force bearing areas may be the same or different, the springs A8 and B12 may be provided with a plurality of sets, and the restoring forces may be the same or different.
In the drilling process of a complex-structure well, the vibration absorption supercharging coupler is installed between a single-bending power drilling tool and a wireless measurement and control instrument while drilling, an upper connector 1 of the vibration absorption supercharging coupler is connected with the wireless measurement and control instrument while drilling, a lower connector 15 of the vibration absorption supercharging coupler is connected with the single-bending power drilling tool, and after drilling fluid enters the vibration absorption supercharging coupler, the drilling fluid enters the single-bending power drilling tool through a center hole 6 in a center shaft 2, so that the output end of the single-bending power drilling tool starts to rotate, and the drill bit is driven to. The bit pressure is transmitted to the outer shell 3 from the central shaft 2 through the spring A8 between the upper valve seat 10 and the central shaft 2 and the spring B12 between the lower valve seat 14 and the central shaft 2, and then transmitted to the drill bit through the single-bend power drill, so that under the action of the bit pressure, the two groups of springs are in a compressed state. The torque generated by the ground driving equipment is transmitted to the central shaft 2 of the vibration absorption pressurizing coupler through the drill string, and then transmitted to the outer shell through the spline pair 5 between the central shaft 2 and the outer shell 3, and further transmitted to the single-bend power drilling tool and the drill bit.
When the single-bending power drilling tool and the drill bit vibrate violently, vibration energy is transmitted upwards to the outer shell 3 of the vibration absorption supercharging coupler, the central shaft 2 of the vibration absorption supercharging coupler is connected with the wireless measurement and control while drilling instrument, the outer shell 3 is connected with the single-bending power drilling tool, and the spring is arranged between the outer shell 3 and the central shaft 2, so that the vibration energy is absorbed and buffered by the spring, and the wireless measurement and control while drilling instrument is protected from being damaged by vibration.
When the output torque of the single-bending power drilling tool is insufficient and the drill bit cannot rotate to crush the rock stratum, the drill bit stops rotating instantly, namely the single-bending power drilling tool brakes instantly, at the moment, the hydraulic pressure in the drilling tool rises sharply, after the high hydraulic pressure enters the vibration absorption pressurizing coupler upwards, the high hydraulic pressure acts on the bottom of the lower valve seat 14 to push the outer shell 3 of the vibration absorption pressurizing coupler to move upwards relative to the central shaft 2 and compress the spring B12 between the central shaft 2 and the lower valve seat 14, meanwhile, the high hydraulic pressure enters the bottom of the upper valve seat 10 through the pressure transfer hole 11 and also pushes the outer shell 3 of the vibration absorption pressurizing coupler to move upwards relative to the central shaft 2 and compress the spring B12 between the central shaft 2 and the upper valve seat 10. According to the mechanics principle, the hydraulic pressure is unchanged, the stressed area of the outer shell 3 is doubled, the hydraulic thrust on the outer shell 3 is doubled, the outer shell 3 moves upwards rapidly relative to the central shaft 2, and the outer shell 3 of the vibration absorption pressurizing coupler is connected with the single-bend power drilling tool through the lower joint 15, so that when the outer shell 3 moves upwards, the single-bend power drilling tool moves upwards along with the upwards movement, the drill bit is driven to move upwards, and the cutting teeth of the drill bit are separated from the rock at the bottom of the well. When the drill bit is separated from the bottom of the well instantaneously, the reaction torque of the braking single-bending power drilling tool and the drill bit disappears instantaneously, the single-bending power drilling tool and the drill bit start to rotate again to break the rock, the hydraulic pressure in the drilling tool is reduced, so that the thrust acting on the bottoms of the outer housing 3, the upper valve seat 10 and the lower valve seat 14 of the vibration-absorbing boost coupler is reduced, under the action of the restoring force of the spring, the outer shell 3 of the vibration absorption pressurizing coupler moves downwards relative to the central shaft 2, further pushing the single-bend power drilling tool and the drill bit to move downwards so that the drill bit contacts the rock at the bottom of the well again to break the rock, and the outer shell 3 of the vibration-absorbing pressurizing coupler generates impact force when moving downwards rapidly, and finally acts on a drill bit, the process is repeatedly circulated, so that the function of converting the braking energy of the single-bend power drilling tool into the pulsating impact force applied to the drill bit is realized, and the rock breaking efficiency of the drill bit is further improved.
Compared with the prior art, the invention has the advantages that the on-site underground test result shows that the drilling efficiency of the well with the complex structure can be averagely improved by 83.6-107.6 percent by using the vibration absorption pressurizing coupler, particularly, the speed-increasing effect is more obvious when the well is drilled in the rock stratum with the medium hardness or higher, the drilling quality meets the design standard, the aim of completing the drilling construction of the well with the complex structure at low cost and high efficiency on the basis of the domestic existing equipment and process technology is achieved, the vibration absorption pressurizing coupler is mainly characterized in that a precise wireless measurement and control instrument while drilling is protected, the vibration damage is prevented, the frequency of the drill-up replacement caused by the damage of the instrument is greatly reduced, the non-drilling production time is greatly shortened, meanwhile, the braking energy of a single-bending power drilling tool is converted into the pulsating impact force on the drill bit, the rock breaking efficiency of the drill bit is further improved, harm is turned into good, and the development of, the method provides powerful technical support for improving the technical level of drilling technology and international market competitiveness of the wells with complex structures in China.
Claims (8)
1. Inhale pressure boost coupler of shaking, including center pin (2), shell body (3), its characterized in that: the central shaft (2) is axially provided with a central hole (6), the outer wall of the central shaft (2) is axially provided with a spline pair (5) and a lower boss at intervals, the bottom of the central shaft (2) is upwards provided with a section of pressure transfer hole (11), and the pressure transfer hole (11) extends to the upper end face of the lower boss; the outer shell (3) is sleeved outside the central shaft (2) below the upper joint (1), the upper end part of the outer shell (3) keeps a certain interval with the bottom of the upper joint (1), the inner wall of the outer shell (3) is provided with spline grooves, an upper valve seat (10) and a lower valve seat (14) at intervals along the axial direction, the spline grooves and a spline pair (5) on the central shaft (2) form axial sliding fit, the lower end surface of the upper valve seat (10) and the upper end surface of a lower boss of the central shaft (2) form blocking fit, and a spring B (12) is sleeved in an annular space between the lower valve seat (14) and the outer boss of the central shaft (2; the central shaft (2) and the outer shell (3) form axial sliding sealing fit.
2. The vibration-absorbing boost coupler of claim 1, wherein: one or more upper bosses are further arranged on the outer wall between the lower boss of the central shaft (2) and the spline pair (5), one or more inner bosses are also arranged on the inner wall of the outer shell (3) corresponding to the upper bosses, and a spring is sleeved in an annular space between the lower part of the upper bosses of the central shaft (2) and the inner bosses of the outer shell (3).
3. The vibration-absorbing boost coupler of claim 1 or 2, wherein: the pressure transmission hole (11) of the lower boss of the central shaft (2) is inclined upwards to the upper end face.
4. The vibration-absorbing boost coupler of claim 3, wherein: and a filtering device is arranged at the inlet of the pressure transfer hole (11).
5. The vibration-absorbing boost coupler of claim 1 or 2, wherein: still include top connection (1) and lower clutch (15), top connection (1) is connected in the upper end of center pin (2), and top connection (1) bottom and shell body (3) upper end keep certain interval, and shell body (3) lower extreme is equipped with lower clutch (15).
6. The vibration-absorbing boost coupler of claim 1 or 2, wherein: the central shaft (2) and the outer shell (3) form axial sliding sealing fit through a sealing device.
7. The vibration-absorbing boost coupler of claim 6, wherein: the sealing device comprises a sealing device A (4) arranged between the central shaft (2) and the top of the outer shell (3), and a sealing device C (9) and a sealing device D (13) arranged between the upper valve seat (10), the lower valve seat (14) and the central shaft (2).
8. The vibration-absorbing boost coupler of claim 7, wherein: and lubricating oil is filled in the annular space where the spline pair (5) and the spring are located.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910050797.9A CN111456717A (en) | 2019-01-20 | 2019-01-20 | Vibration absorption and pressurization coupler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910050797.9A CN111456717A (en) | 2019-01-20 | 2019-01-20 | Vibration absorption and pressurization coupler |
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| Publication Number | Publication Date |
|---|---|
| CN111456717A true CN111456717A (en) | 2020-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910050797.9A Pending CN111456717A (en) | 2019-01-20 | 2019-01-20 | Vibration absorption and pressurization coupler |
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| CN (1) | CN111456717A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112901062A (en) * | 2021-01-27 | 2021-06-04 | 中国石油大学(华东) | Automatic torque adjusting device for drill bit |
-
2019
- 2019-01-20 CN CN201910050797.9A patent/CN111456717A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112901062A (en) * | 2021-01-27 | 2021-06-04 | 中国石油大学(华东) | Automatic torque adjusting device for drill bit |
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