阅读说明：本技术 一种减阻装置 (Resistance reducing device ) 是由 王端庠 曹良波 单代伟 姚宇翔 姜中舰 白明 李�杰 于 2019-09-25 设计创作，主要内容包括：本发明涉及石油天然气井下工具领域,具体涉及一种减阻装置,包括第一芯轴、第一旋转装置、第二旋转装置、第二芯轴、第一运动装置、第二运动装置、第一外筒体,第一旋转装置与第一芯轴连接,第二旋转装置与第一旋转装置连接,第二芯轴与第一运动装置连接,第一运动装置与第一外筒体连接,第二运动装置与第一外筒体连接。当钻柱水眼内的压力增加时,第一运动装置和第二运动装置沿第一芯轴轴线直线运动,第一旋转装置在直线运动时产生旋转运动,带动第二旋转装置旋转；当钻柱水眼内的压力减小时,弹性装置反推,第一旋转装置和第二旋转装置反向旋转,产生轴向和周向的双向振动,可大大降低钻柱与井壁之间的摩阻,不但能有效解决钻井托压问题,同时还能有效抑制粘滑卡钻,从而达到提高钻井效率,保障钻柱安全的目的。(The invention relates to the field of petroleum and natural gas downhole tools, in particular to a damping device which comprises a first mandrel, a first rotating device, a second mandrel, a first moving device, a second moving device and a first outer cylinder body. When the pressure in the water hole of the drill string is increased, the first moving device and the second moving device move linearly along the axis of the first mandrel, and the first rotating device generates rotating motion during linear motion to drive the second rotating device to rotate; when the pressure in the water hole of the drill stem is reduced, the elastic device reversely pushes, the first rotating device and the second rotating device reversely rotate to generate axial and circumferential bidirectional vibration, the friction between the drill stem and the well wall can be greatly reduced, the problem of well drilling pressure supporting can be effectively solved, and stick-slip drill clamping can be effectively inhibited at the same time, so that the aims of improving the well drilling efficiency and ensuring the safety of the drill stem are fulfilled.)

1. A drag reduction device comprises

A first mandrel;

a first rotating device;

the first rotating device is connected with the first spindle;

a second rotating device;

a second mandrel;

a first motion device;

a second motion device;

a first outer cylinder;

the second rotating device is connected with the first rotating device;

the second mandrel is connected with the first movement device;

the second mandrel is connected with the first outer cylinder;

the first movement device is connected with the first outer cylinder;

the second movement device is connected with the first outer cylinder.

2. Drag reducing device according to claim 1, characterized in that:

the first rotating device is a hollow cylinder;

the first rotation means comprises an inner rotating surface thread;

the first rotation means comprises an outer rotational surface spline;

the first mandrel comprises an outer rotational surface thread;

the first rotating means inner rotating surface thread is in threaded connection with the first mandrel outer rotating surface.

3. Drag reducing device according to claim 2, characterized in that:

further comprising:

a second outer barrel;

the second outer barrel includes an inner rotating surface spline;

and the second outer cylinder body inner rotating surface spline is connected with the first rotating device outer rotating surface spline.

4. Drag reducing device according to claim 3, characterized in that:

further comprising:

a centralizing sleeve;

the righting sleeve is connected with the first spindle;

the first mandrel is connected with the second rotating device.

5. Drag reducing device according to claim 4, characterized in that:

further comprising:

a half ring;

a nut sleeve;

the semi-ring is connected with the first core shaft;

the nut sleeve is connected with the semi-ring;

the nut sleeve is connected with the second rotating device.

6. Drag reducing device according to claim 5, characterized in that:

further comprising:

an elastic device;

one end of the elastic device is connected with the first rotating device; the other end of the elastic device is connected with the second mandrel;

the elastic device is connected with the first outer cylinder; the elastic device is connected with the first core shaft.

7. Drag reducing device according to claim 6, characterized in that:

the elastic device is a disc spring.

8. Drag reducing device according to claim 7, characterized in that:

further comprising:

a nut cushion;

the nut pad is connected with the first spindle.

Technical Field

The invention relates to the field of petroleum and natural gas downhole tools, in particular to a damping device.

Background

In the field of petroleum and natural gas, in the process of directional well drilling, when a drill string drills downwards, large frictional resistance is gradually generated between the drill string and a well wall, so that the drilling pressure cannot be timely transmitted to a drill bit, and the pressure supporting phenomenon is generated. Meanwhile, the length of the drill string is increased, so that the drill string is very difficult to rotate underground, the stick-slip vibration phenomenon is generated, the stick-slip phenomenon is movement between complete adhesion contact and sliding contact, the torque fluctuation is large in the stick-slip process of the drill string, the drilling efficiency is influenced, the existing drag reduction devices at home and abroad are single axial vibration, and when the well depth reaches a certain degree, the drag reduction effect is remarkably reduced.

Disclosure of Invention

In view of the above, there is a need for a fairing.

A drag reduction device comprises

A first mandrel;

a first rotating device;

the first rotating device is connected with the first spindle;

a second rotating device;

a second mandrel;

a first motion device;

a second motion device;

a first outer cylinder;

the second rotating device is connected with the first rotating device;

the second mandrel is connected with the first movement device;

the second mandrel is connected with the first outer cylinder;

the first movement device is connected with the first outer cylinder;

the second movement device is connected with the first outer cylinder.

The first rotating device is a hollow cylinder;

the first rotation means comprises an inner rotating surface thread;

the first rotation means comprises an outer rotational surface spline;

the first mandrel comprises an outer rotational surface thread;

the first rotating means inner rotating surface thread is in threaded connection with the first mandrel outer rotating surface.

The fairing also comprises:

a second outer barrel;

the second outer barrel includes an inner rotating surface spline;

and the second outer cylinder body inner rotating surface spline is connected with the first rotating device outer rotating surface spline.

The fairing also comprises:

a centralizing sleeve;

the righting sleeve is connected with the first spindle;

the first mandrel is connected with the second rotating device.

The fairing also comprises:

a half ring;

a nut sleeve;

the semi-ring is connected with the first core shaft;

the nut sleeve is connected with the semi-ring;

the nut sleeve is connected with the second rotating device.

The fairing also comprises:

an elastic device;

one end of the elastic device is connected with the first rotating device; the other end of the elastic device is connected with the second mandrel;

the elastic device is connected with the first outer cylinder; the elastic device is connected with the first core shaft.

The elastic device is a disc spring.

The fairing also comprises:

a nut cushion;

the nut pad is connected with the first spindle.

Due to the adoption of the technical scheme, the invention has the beneficial effects that:

when the pressure in the water hole of the drill string is increased, the first moving device and the second moving device are pushed to generate linear motion along the axis of the first mandrel, the first moving device pushes the second mandrel to move, the second mandrel moves to push the elastic device to move, the second moving device pushes the elastic device to move, the elastic device moves to push the first rotating device to move along the linear motion along the axis of the first mandrel, and the first rotating device generates rotary motion during the linear motion due to the fact that the internal thread of the first rotating device is matched with the external thread of the first mandrel, and the second rotating device is driven to rotate; when the pressure of the elastic device in the water hole of the drill string is reduced, the second mandrel and the second movement device are pushed reversely to move, and the first rotating device and the second rotating device are caused to rotate reversely, so that axial and circumferential bidirectional vibration is generated simultaneously, friction between the drill string and the well wall is greatly reduced, the problem of pressure supporting in drilling can be effectively solved, and stick-slip drill sticking can be effectively inhibited, so that the aims of improving the drilling efficiency and ensuring the safety of the drill string are fulfilled.

Drawings

FIG. 1 is a schematic diagram of the fairing of the present invention.

Fig. 2 is a schematic side view of a first mandrel of the present invention.

FIG. 3 is a schematic axial view of a second rotary device according to the present invention.

Fig. 4 is a schematic view a-a of fig. 3.

FIG. 5 is a schematic axial view of a first rotary device according to the present invention.

Fig. 6 is a partial schematic view of fig. 1.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.