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Low-pressure-loss underground tool for speeding up by vibration

A tool and low-pressure technology, which is applied in the field of downhole vibration speed-up tools with low pressure consumption, can solve the problems of high vibration frequency and short service life of tools, achieve the effects of small pressure loss, increase vibration effect, and avoid damage to downhole instruments

Active Publication Date: 2016-11-09
天津世纪华源地环科技有限公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a low-pressure consumption downhole vibration speed-up tool, which can reduce the pressure loss of the tool while ensuring the downhole vibration effect. The problem of making the vibration frequency too high and the problem of short tool life

Method used

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Embodiment Construction

[0026] Such as Figure 1-2 中,一种低压耗井下振动提速工具,压力脉冲发生工具15和振幅放大工具16,压力脉冲发生工具15可以连接在振幅放大工具16的上部,也可以连接在振幅放大工具16的下部,参见 figure 1 , 2 middle.

[0027] Such as Figure 3-4 中,压力脉冲发生工具15的外壳体14内设有中心轴3,中心轴3可旋转的支承载外壳体14内,外壳体14和中心轴3设有驱动涡轮5,驱动涡轮5下部设有减速涡轮6,期驱动涡轮5和减速涡轮6的数量可为任意个数,可任意组合,使中心轴3转速可调,中心轴3下端与动阀片11固定连接,动阀片11下部设有定阀片12,动阀片11和定阀片12组成动、定阀组,动阀片11上设有动阀进液孔1101,动阀进液孔1101交替的与定阀片12的两进液孔1201连通,定阀片12的两进液孔1201与涡流振动装置13的两进液槽1301连通,定阀片12的下部设有成U型的涡流振动装置13,参见 image 3 .

[0028] 涡流振动装置13采用采用轴向对剖的结构,内设有成圆形的涡腔1302,两条进液槽1301与涡腔1302切向连接;涡腔1302的中心设有涡腔出口1303,涡腔出口1303与出液口1304连通,当高速液流由进液槽1301进入,在涡腔1302内形成涡流,参见 Figure 4 .

[0029] 当流体经上接头1进入工具内部,经成锥形的导流端盖2,引导流体流入中心轴3与外壳体14之间的间隙中,流经驱动涡轮5和减速涡轮6,驱动涡轮5带动中心轴3旋转,减速无聊6对中心轴3起减速作用,之后流体经导流环7流入中心轴3内部,经动阀片导流孔1101和定阀片导流孔1201进入涡流振动装置13,假设流体先进入涡流振动装置13的左进液槽1301,流体在涡腔1302内形成逆时针的涡流,动阀片11上部压力增加,处于压力脉冲的高压区,随着动阀片11的转动,液流切换到右进液槽1301,涡腔1302内的逆时针涡流开始消退,动阀片上部压力减小,处于压力脉冲的低压区,随着时间的推移,涡腔1302内顺时针涡流逐渐形成,动阀片11上部压力再次增加,处于压力脉冲高压区,如此反复,随着动阀片11的转动,在工具内形成周期性的压力波动。

[0030] Such as Figure ...

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Abstract

The invention relates to a low-pressure-loss underground tool for speeding up by vibration. A technical scheme provided by the invention is as follows: the low-pressure-loss underground tool for speeding up by vibration consists of a pressure pulse generation tool and a vibration amplitude amplification tool, wherein a movable valve block is arranged in the pressure pulse generation tool and is driven by a turbine to rotate, and the rotation speed of the movable valve block is regulated by a speed reduction turbine; a U-shaped eddy vibration device is arranged at the lower part of a movable-fixed valve group; runners are continuously switched by the movable valve block, so that the fluid in a circular vortex chamber is switched between an eddy state and a non-eddy state; when the fluid in the vortex chamber is at the eddy state, the upper part of the pressure pulse generation tool is at a high pressure state, and when the fluid in the vortex chamber is at the non-eddy state, the upper part of the pressure pulse generation tool is at a low pressure state, so that a periodic pressure pulse is generated in the pressure pulse generation tool; the upper part or the lower part of the pressure pulse generation tool is connected with the vibration amplitude amplification tool, so that periodic axial vibration is generated by bottom hole assemblies, thereby effectively improving the friction resistance between a drill column and the wall of a well, and improving the drilling speed.

Description

technical field [0001] 本发明涉及石油、天然气开采、钻井工具领域,尤其是一种低压耗井下振动提速工具。 Background technique [0002] 随着大斜度井、水平井的广泛应用,在钻进过程中,由于钻具自重作用,钻具在钻进时与井壁摩阻大,造成钻具托压,严重影响水平井钻进效率,因此降低摩阻、增加动钻压,提高钻井效率是当前钻井工程中迫切需要解决的问题。 经研究发现,对钻柱施加适当周期性轴向振动,使钻柱与井壁之间的静摩擦变为动摩擦,能大大减少钻井过程的摩阻,使有效钻压增加,从而达到提高机械钻速 the goal of. [0003] 现有的振动减摩阻工具如中国专利文献CN103696693A钻井用水力振荡器、CN102704842A一种钻井用水力振荡器所描述,其结构都采用单头螺杆马达驱动动阀口在一个平面上做往复运动,通过动阀口和定阀形成的过流面积差,产生周期性的压力波动,上述采用螺杆驱动的结构,因螺杆寿命的限制,通常在水基泥浆环境下使用寿命为150小时左右,在油基泥浆环境下使用寿命为80小时左右,其橡胶元件制约了该结构的使用寿命和使用工况等;也有中国专利文献如CN 104895517A一种涡轮驱动双阀水力振荡器、CN105089501A一种水力振荡器所描述,其结构都采用涡轮驱动动阀口转动,通过转动过程中与定阀形成过流面积差,产生周期性的压力波动,上述采用涡轮驱动的水力振荡器,因采用涡轮结构,在寿命上有很大改观,但涡轮的转速为800-2000转 / 分,相比螺杆140-360转 / 分的转速,涡轮驱动的振动工具振动频率为螺杆结构的5.5倍左右,过高的振动频率会削弱工具的振动效果,并且对MWD等井下仪器有破坏性的影响;同时由于以上专利都采用过流面积差是工具产生周期性的压力变化,因此造成工具自身压耗普遍偏大(约4.5-8MPa),对钻井泵的要求较高,且长期在高压下作业易出现井下故障,造成财产损失和人员伤亡。 Contents of the invention [0004] 本发明所要解决的技术问题是提供一种低压耗井下振动提速工具,保证井下振动效果的同时,减小工具压耗,优选的方案中,能够实现振动频率可调,解决现有技术中涡轮驱动使振动频率过高的问题和工具使用寿命短的问题。 [0005] 为解决上述技术问题,本发明所...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B4/02E21B7/24
CPCE21B4/02E21B7/24
Inventor 张静
Owner 天津世纪华源地环科技有限公司
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