阅读说明：本技术 一种随钻仪器用自调节阻尼减振器及其调节方法 (Self-adjusting damping shock absorber for drilling instrument and adjusting method thereof ) 是由 何新振 底青云 杜建生 于 2020-03-30 设计创作，主要内容包括：本发明涉及自调节阻尼减振器,尤其涉及一种随钻仪器用自调节阻尼减振器及其调节方法。所述自调节阻尼减振器包括振动监测及控制器短节和减振器本体；振动监测及控制器短节安装在井下随钻仪器内部,减振器本体的一端与振动监测及控制器短节通过绝缘连接件连接,且连接处设有绝缘垫,另一端与需要减振的传感器或电路板短节连接,且减振器本体内部设有采用电活性聚合物为阻尼调节层,通过控制施加电压的大小,即可实现阻尼调节,具有反应速度快,控制精度高。本发明的自调节阻尼减振器其能够根据井下振动、温度的变化,调节减振器阻尼,从而使减振器固有频率避开或者远离井下随钻仪器振动频率,以免发生共振,从而使减振器达到最佳的减振效果。(The invention relates to a self-adjusting damping shock absorber, in particular to a self-adjusting damping shock absorber for a drilling instrument and an adjusting method thereof. The self-adjusting damping shock absorber comprises a vibration monitoring and controller short section and a shock absorber body; vibration monitoring and controller nipple joint are installed inside the instrument along with boring in the pit, and the one end of shock absorber body passes through insulating connecting piece with vibration monitoring and controller nipple joint to be connected, and the junction is equipped with insulating pad, and the other end is connected with the sensor or the circuit board nipple joint that need the damping, and the inside electroactive polymer that adopts of shock absorber body is the damping adjustment layer that is equipped with of shock absorber body, exerts the size of voltage through control, can realize the damping and adjust, it is fast to have reaction rate, and control accuracy is high. The self-adjusting damping shock absorber can adjust the damping of the shock absorber according to the change of underground vibration and temperature, so that the natural frequency of the shock absorber is avoided or is far away from the vibration frequency of an underground drilling instrument to avoid resonance, and the shock absorber achieves the best shock absorption effect.)

1. The self-adjusting damping shock absorber for the while-drilling instrument is characterized by comprising a vibration monitoring and controller short section and a shock absorber body;

the vibration monitoring and controller short section is used for monitoring the vibration frequency of the underground drilling instrument under different working conditions, analyzing the vibration frequency and controlling the vibration absorber body;

the vibration absorber body is used for absorbing vibration energy and accelerating vibration attenuation, and can change a vibration attenuation damping coefficient according to the vibration monitoring and the instruction of the controller short section;

the vibration monitoring and controller short section is installed in the underground drilling instrument, one end of the vibration absorber body is connected with the vibration monitoring and controller short section through an insulating connecting piece, and the other end of the vibration absorber body is connected with the short section needing vibration attenuation.

2. The self-adjusting damping shock absorber of claim 1 wherein said shock absorber body comprises a shock absorber shell, a shock absorber inner core, a damping tuning layer and a anti-rotation rod;

one end of the shock absorber shell is connected with the sensor or the short section of the circuit board which needs to absorb the shock, a damping adjusting cavity is arranged inside the other end of the shock absorber shell, a limiting boss is arranged inside the damping adjusting cavity, and a limiting ring groove is arranged on the side wall close to the end part of the damping adjusting cavity;

the damping adjusting layer is coated on the outer side wall of the inner core of the shock absorber, one end of the inner core of the shock absorber is inserted into the damping adjusting cavity, a rotation stopping rod fixing through hole and a double boss matched with the limiting boss are arranged on the inner core of the shock absorber inserted into the damping adjusting cavity, the rotation stopping rod is inserted into the rotation stopping rod fixing through hole, two ends of the rotation stopping rod are respectively inserted into the limiting ring grooves, and the rotation stopping rod can rotate along the limiting ring grooves;

and the other end of the inner core of the vibration absorber is connected with the vibration monitoring and controller short section.

3. The self-adjusting damping shock absorber as set forth in claim 2 wherein said shock absorber housing includes a first shock absorber half-shoe and a second shock absorber half-shoe;

the cross sections of the first damper half tile and the second damper half tile are semicircular, bosses and grooves are respectively arranged on the end faces of the first damper half tile and the second damper half tile, and the bosses are matched with the grooves to realize the mutual limiting of the first damper half tile and the second damper half tile.

4. Self-adjusting damping shock absorber according to claim 2, characterized in that the thickness of the damping adjustment layer is 2-5 mm.

5. The self-adjusting damping shock absorber of claim 2 wherein the damping adjustment layer is made of an electroactive polymer.

6. The self-adjusting damping shock absorber as set forth in claim 1 wherein said insulating pad and insulating connector are constructed of a high strength PEEK material.

7. The self-adjusting damping shock absorber of claim 1 wherein the vibration monitoring and controller sub comprises a structural body, a power module, an X-axis vibration accelerometer, a Y-axis vibration accelerometer, a Z-axis vibration accelerometer, a temperature sensor, and a controller;

the X-axis vibration accelerometer, the Y-axis vibration accelerometer, the Z-axis vibration accelerometer, the power module, the temperature sensor and the controller are all arranged on the structural body;

the X-axis vibration accelerometer, the Y-axis vibration accelerometer, the Z-axis vibration accelerometer, the power module and the temperature sensor are all connected with the controller, and one end of the structure body is fixedly connected with one end of the inner core of the shock absorber.

8. Method of adjusting a self-adjusting damping shock absorber according to any of claims 1 to 7, characterized in that it comprises in particular the steps of:

s1) acquiring vibration frequencies of the underground while-drilling instrument at different temperatures in real time according to limited time, wherein the vibration frequencies are used as the vibration frequency x of the underground environment at the moment;

s2) comparing the acquired vibration frequency x of the downhole drilling tool at different temperatures with the inherent vibration frequency y of the vibration damper adjusted last time;

s3) judging whether the natural vibration frequency y of the shock absorber needs to be adjusted to avoid resonance according to the comparison result.

9. The adjusting method according to claim 8, wherein the comparison in S2) is determined according to:

if y is less than or equal to 0.6x and y is greater than or equal to 1.4x, the inherent vibration frequency y of the shock absorber is not adjusted;

if y is less than 0.6x and less than x, the natural vibration frequency of the shock absorber is adjusted to be 1.4 x;

if x < y < 1.4x, the natural vibration frequency of the damper is adjusted to be 0.6 x.

10. The adjustment method according to claim 8, wherein the current downhole environmental vibration frequency x in S1) is: intercepting the vibration frequency with the fluctuation rate less than or equal to 10% in the vibration frequency of the adopted underground while-drilling instrument.

Technical Field

The invention relates to a damping shock absorber, in particular to a self-adjusting damping shock absorber for a drilling instrument and an adjusting method thereof.

Background

At present, the drilling instrument is used for underground work, the operation environment is very severe, and high temperature, high pressure, strong vibration and strong impact are gathered, so that the high-precision sensor and the complex precision circuit board need the vibration absorber to absorb vibration when working in the environment, the service life of the sensor and the circuit board is prolonged, and the underground work failure rate is reduced. However, in the prior art, the shock absorber is made of common rubber, and once the common rubber shock absorber is designed, the rubber rigidity and the damping are fixed, so that the natural frequency of the shock absorber is also fixed, and when the underground vibration is close to the natural frequency of the shock absorber, the shock absorber is easy to resonate, and a good shock absorbing effect cannot be achieved. The underground vibration is extremely complex, the frequency is not constant, and the shock absorber cannot adapt to each working condition. When the underground temperature rises, the rubber rigidity and the damping of the shock absorber are changed, the shock absorber is easy to lose effectiveness, and a good shock absorption effect cannot be achieved.

Disclosure of Invention

The invention discloses a self-adjusting damping shock absorber for a drilling-while-drilling instrument, which aims to solve any one of the above and other potential problems in the prior art.

In order to achieve the purpose, the technical scheme of the invention is as follows: a self-adjusting damping shock absorber for a while-drilling instrument comprises a vibration monitoring and control controller short section and a shock absorber body;

the vibration monitoring and controller short section is used for monitoring the vibration frequency of the underground drilling instrument under different working conditions, analyzing the vibration frequency and controlling the vibration absorber body;

the vibration absorber body is used for absorbing vibration energy and accelerating vibration attenuation, and can change a vibration attenuation damping coefficient according to instructions of the vibration monitoring and controller short section, so that the natural frequency is changed, and resonance is avoided;

the vibration monitoring and controller short section is installed in the underground drilling instrument, one end of the vibration absorber body is connected with the vibration monitoring and controller short section through an insulating connecting piece, and the other end of the vibration absorber body is connected with the short section needing vibration attenuation.

Further, the shock absorber body comprises a shock absorber shell, a shock absorber inner core, a damping adjusting layer and a rotation stopping rod;

one end of the shock absorber shell is connected with the sensor or the short section of the circuit board which needs to absorb the shock, a damping adjusting cavity is arranged inside the other end of the shock absorber shell, a limiting boss is arranged inside the damping adjusting cavity, and a limiting ring groove is arranged on the side wall close to the end part of the damping adjusting cavity;

the damping adjusting layer is coated on the outer side wall of the inner core of the shock absorber, one end of the inner core of the shock absorber is inserted into the damping adjusting cavity, a rotation stopping rod fixing through hole and a double boss matched with the limiting boss are arranged on the inner core of the shock absorber inserted into the damping adjusting cavity, the rotation stopping rod is inserted into the rotation stopping rod fixing through hole, two ends of the rotation stopping rod are respectively inserted into the limiting ring grooves, and the rotation stopping rod can rotate along the limiting ring grooves;

and the other end of the inner core of the vibration absorber is connected with the vibration monitoring and controller short section.

Further, the damper housing includes a first damper half-shoe and a second damper half-shoe;

the cross sections of the first damper half tile and the second damper half tile are semicircular, bosses and grooves are respectively arranged on the end faces of the first damper half tile and the second damper half tile, and the bosses are matched with the grooves to realize the mutual limiting of the first damper half tile and the second damper half tile.

Further, the thickness of the damping adjusting layer is 2-5 mm.

Furthermore, the damping adjusting layer is made of electroactive polymers.

Furthermore, the insulating pad and the insulating connecting piece are made of high-strength PEEK materials.

Further, the vibration monitoring and controller short section comprises a structure body, a power supply module, an X-axis vibration accelerometer, a Y-axis vibration accelerometer, a Z-axis vibration accelerometer, a temperature sensor and a controller;

the X-axis vibration accelerometer, the Y-axis vibration accelerometer, the Z-axis vibration accelerometer, the power module, the temperature sensor and the controller are all arranged on the structural body;

the X-axis vibration accelerometer, the Y-axis vibration accelerometer, the Z-axis vibration accelerometer, the power module and the temperature sensor are all connected with the controller, and one end of the structure body is fixedly connected with one end of the inner core of the shock absorber.

The self-adjusting damping shock absorber is mounted in the while-drilling instrument so as to achieve automatic damping adjustment.

Another object of the present invention is to provide an adjusting method using the above self-adjusting damping shock absorber, which specifically comprises the following steps:

s1) acquiring vibration frequencies of the underground while-drilling instrument at different temperatures in real time according to limited time, wherein the vibration frequencies are used as the vibration frequency x of the underground environment at the moment;

s2) comparing the acquired vibration frequency x of the downhole drilling tool at different temperatures with the inherent vibration frequency y of the vibration damper adjusted last time;

s3) according to the comparison result, determining whether the natural vibration frequency y of the damper needs to be adjusted to avoid resonance (i.e. x ≠ y).

Further, the comparison judgment in S2) is as follows:

if y is less than or equal to 0.6x and y is greater than or equal to 1.4x, the inherent vibration frequency y of the shock absorber is not adjusted;

if y is less than 0.6x and less than x, the natural vibration frequency of the shock absorber is adjusted to be 1.4 x;

if x < y < 1.4x, the natural vibration frequency of the damper is adjusted to be 0.6 x.

Further, the current downhole environment vibration frequency in S1) is: intercepting the vibration frequency with the fluctuation rate less than or equal to 10% in the vibration frequency of the adopted underground while-drilling instrument.

The invention has the beneficial effects that: by adopting the technical scheme, the self-adjusting damping shock absorber can adjust the damping of the shock absorber according to the change of underground vibration and temperature, so that the natural frequency of the shock absorber is avoided or kept away from the vibration frequency of the underground environment to avoid resonance, and the shock absorber achieves the optimal shock absorbing effect.

Drawings

FIG. 1 is a schematic structural diagram of a self-adjusting damping vibration absorber for a while-drilling instrument according to the present invention.

FIG. 2 is a schematic diagram of an A-direction cross-sectional structure of the self-adjusting damping vibration absorber for a while-drilling instrument according to the invention.

FIG. 3 is a schematic diagram of a B-direction cross-sectional structure of the self-adjusting damping vibration absorber for a while-drilling instrument according to the invention.

FIG. 4 is a schematic diagram of a C-direction cross-sectional structure of the self-adjusting damping vibration absorber for a while-drilling tool according to the present invention.

In the figure:

1. the vibration monitoring and control device comprises a vibration monitoring and control device short section, 2, a vibration absorber body, 3, a vibration absorber inner core, 3.1, a rotation stopping rod fixing through hole, 3.2, double bosses, 4, a damping adjusting layer, 5, an insulating pad, 6, an insulating connecting piece, 7, an X-axis vibration accelerometer, 8, a power module, 9, a structural body, 10, a controller, 11, a rotation stopping rod, 12, a Z-axis vibration accelerometer, 13, a Y-axis vibration accelerometer, 14, a temperature sensor, 15, a damping adjusting cavity, 15.1, a limiting boss, 15.2, a limiting ring groove, 16, a vibration absorber shell, 16.1, a first vibration absorber half tile, 16.2, a second vibration absorber half tile, 16.3, 16.4, a groove and 17, wherein the vibration sensor or the circuit board short section needs to damp.

Detailed Description

The technical scheme of the invention is further explained by combining the attached drawings.

As shown in fig. 1-2, the self-adjusting damping vibration absorber for a while-drilling instrument comprises a vibration monitoring and control device short section 1 and a vibration absorber body 2;

the vibration monitoring and controlling pup joint 1 is used for monitoring the vibration frequency of the underground drilling tool under different working conditions, analyzing the vibration frequency and controlling the vibration absorber body 2;

the vibration absorber body 2 is used for absorbing vibration energy and accelerating vibration attenuation, and can change a vibration attenuation damping coefficient according to the instruction of the vibration monitoring and controller short section 1, so that the natural frequency is changed, and resonance is avoided;

the vibration monitoring and controller short section 1 is installed inside the underground drilling instrument, one end of the vibration absorber body 2 is connected with the vibration monitoring and controller short section 1 through an insulating connecting piece 6, and the other end of the vibration absorber body is connected with a short section 17 needing vibration attenuation.

The shock absorber body 2 comprises a shock absorber shell 16, a shock absorber inner core 3, a damping adjusting layer 4 and a rotation stopping rod 11;

one end of the shock absorber shell 16 is connected with the sensor or the circuit board short section 15 which needs to absorb shock, a damping adjusting cavity 15 is arranged inside the other end of the shock absorber shell, a limiting boss 15.1 is arranged inside the damping adjusting cavity 15, and a limiting ring groove 15.2 is arranged on the side wall close to the end part of the damping adjusting cavity 15;

the damping adjusting layer 4 is uniformly coated on the outer side wall of the shock absorber inner core 3, one end of the shock absorber inner core 3 is inserted into the damping adjusting cavity 15, a double boss 3.2 matched with the rotation stopping rod fixing through hole 3.1 and the limiting boss 15.1 is arranged on the shock absorber inner core 3 inserted into the damping adjusting cavity, the rotation stopping rod 11 is inserted into the rotation stopping rod fixing through hole 3.1, two ends of the rotation stopping rod are respectively inserted into the limiting ring groove 15.1, and the rotation stopping rod 11 can rotate along the limiting ring groove 15.1;

the other end of the inner core 3 of the vibration absorber is connected with the vibration monitoring and controller short section 2.

The damper housing 16 consists of a first damper half-shell 16.1 and a second damper half-shell 16.2;

the cross sections of the first damper half tile 16.1 and the second damper half tile 16.2 are semicircular, a boss 16.3 and a groove 16.4 are respectively arranged on the end faces, and the boss 16.3 is matched with the groove 16.4 to realize mutual limiting of the first damper half tile 16.1 and the second damper half tile 16.2.

The thickness of the damping adjusting layer 4 is 2-5 mm.

The damping adjusting layer 4 is made of electroactive polymer.

The insulating pad 5 and the insulating connecting piece 6 are made of high-strength PEEK materials.

The vibration monitoring and controller short section 2 comprises a structural body 9, a power supply module 8, an X-axis vibration accelerometer, a 7Y-axis vibration accelerometer 12, a Z-axis vibration accelerometer 13, a temperature sensor 14 and a controller 10;

the X-axis vibration accelerometer 7, the Y-axis vibration accelerometer 12, the Z-axis vibration accelerometer 13, the power module 8, the controller 10 and the temperature sensor 14 are arranged on the structural body 9, the X-axis vibration accelerometer 7, the Y-axis vibration accelerometer 12, the Z-axis vibration accelerometer 13, the power module 8, the controller 10 and the temperature sensor 14 are all connected with the controller 10, and one end of the structural body 9 is fixedly connected with one end of the inner core 3 of the shock absorber, as shown in fig. 3-4.

An adjusting method adopting the self-adjusting damping shock absorber comprises the following steps:

s1) acquiring vibration frequencies of the underground while-drilling instrument at different temperatures in real time according to limited time, wherein the vibration frequencies are used as the vibration frequency x of the underground environment at the moment;

s2) comparing the acquired vibration frequency x of the underground while drilling instrument at different temperatures with the natural vibration frequency y of the vibration damper after the previous adjustment;

s3) judging whether the natural vibration frequency y of the shock absorber needs to be adjusted to avoid resonance according to the comparison result.

The comparison judgment basis in S2) is:

if y is less than or equal to 0.6x and y is greater than or equal to 1.4x, the inherent vibration frequency y of the shock absorber is not adjusted;

if y is less than 0.6x and less than x, the natural vibration frequency of the shock absorber is adjusted to be 1.4 x;

if x < y < 1.4x, the natural vibration frequency of the damper is adjusted to be 0.6 x.

The current downhole environmental vibration frequency x in S1) is: intercepting the vibration frequency with the fluctuation rate less than or equal to 10% in the vibration frequency of the adopted underground while-drilling instrument.