CN201606068U - 一种钻井井筒直径的井径仪 - Google Patents

一种钻井井筒直径的井径仪 Download PDF

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Publication number
CN201606068U
CN201606068U CN2009202742852U CN200920274285U CN201606068U CN 201606068 U CN201606068 U CN 201606068U CN 2009202742852 U CN2009202742852 U CN 2009202742852U CN 200920274285 U CN200920274285 U CN 200920274285U CN 201606068 U CN201606068 U CN 201606068U
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caliper
well
diameter
measuring
wellbore
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熊志华
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XI'AN WEIERLUOGEN ENERGY TECHNOLOGY Co Ltd
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XI'AN WEIERLUOGEN ENERGY TECHNOLOGY Co Ltd
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Abstract

本实用新型涉及一种石油勘探工程中的钻井井筒直径的井径仪。现有的设备存在以下缺点:当井径仪在斜井和水平井中测量时,井径仪由于自身重力的作用,井径仪在井筒中会产生偏心,井径仪轴心和井筒轴心不重合,这样造成测量值会小于井筒直径。本实用新型通过四个独立的井径测量臂正交连接构成,每个井径测量臂的底部设置有一个测量传感器;所述的测量传感器连接有供电源。本实用新型结构简单,但测量精度高,有效解决了国内外普通井径测井仪在定向斜井和水平井中,由于仪器重力作用而压缩井径臂导致井径测量偏差的问题。计算固井水泥量精度从36%提高到5%。

Description

一种钻井井筒直径的井径仪
技术领域
本实用新型涉及一种石油勘探工程中的钻井井筒直径的井径仪。
技术背景
石油钻探过程中,通过对井径的测量,可计算固井水泥量和对其他测井数据进行校正,普通井径仪的测量原理为:将井径仪的四个测量臂的测量值相加作为井筒的平均井径值,或将相对的两个井径臂(1、3号臂和2、4号臂)测量值相加为井筒的X、Y两轴井径值。
这种测量方法有以下缺点:当井径仪在斜井和水平井中测量时,井径仪由于自身重力的作用,井径仪在井筒中会产生偏心,井径仪轴心和井筒轴心不重合,这样造成测量值会小于井筒直径。
实用新型内容
本实用新型所解决的技术问题是提供一种测量准确、结构简单的钻井井筒直径的井径仪。
为解决上述的技术问题,本实用新型采取的技术方案:
本实用新型的特殊之处在于:所述的测径仪通过四个独立的井径测量臂正交连接构成,每个井径测量臂的底部设置有一个测量传感器;所述的测量传感器连接有供电源。
上述的每个测量传感器连接一个供电源。
与现有技术相比,本实用新型的有益效果:
本实用新型结构简单,但测量精度高,有效解决了国内外普通井径测井仪在定向斜井和水平井中,由于仪器重力作用而压缩井径臂导致井径测量偏差的问题。计算固井水泥量精度从36%提高到5%。
附图说明
图1为本实用新型的结构示意图。
具体实施方式
下面结合附图和具体实施方式对本实用新型进行详细说明。
参见图1,本实用新型通过四个独立的井径测量臂2正交连接设置在测径仪1上构成,每个井径测量臂2的底部设置有一个测量传感器;所述的测量传感器连接有供电源。
每个测量传感器连接一个供电源,免除4个测量传感器之间相互影响。
使用本实用新型测量井径的方法如下:
本实用新型的四个井径测量臂底部的每个测量传感器输出四个测量信号r1、r2、r3、r4
测量信号r1、r2、r3、r4经下列计算可得到井筒直径,如图2:
O为井筒圆心,井筒直径
D13=A′C′=2OA
D24=B′D′=2OB
OA = ( r 1 + r 3 2 ) 2 + ( r 2 - r 4 2 ) 2
其中D13为测量值r1、r3所对应的井筒直径,D24为测量值r2、r4所对应的实际井筒直径,得到X轴直径
D 13 = 2 ( r 1 + r 3 2 ) 2 + ( r 2 - r 4 2 ) 2
OB = ( r 2 + r 4 2 ) 2 + ( r 1 - r 3 2 ) 2
得到Y轴直径
D 24 = 2 ( r 2 + r 4 2 ) 2 + ( r 1 - r 3 2 ) 2

Claims (2)

1.一种钻井井筒直径的井径仪,其特征在于:所述的测径仪(1)通过四个独立的井径测量臂(2)正交连接构成,每个井径测量臂(2)的底部设置有一个测量传感器;所述的测量传感器连接有供电源。
2.根据权利要求1所述的一种钻井井筒直径的井径仪,其特征在于:所述的每个测量传感器连接一个供电源。
CN2009202742852U 2009-12-14 2009-12-14 一种钻井井筒直径的井径仪 Expired - Fee Related CN201606068U (zh)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102094633A (zh) * 2009-12-14 2011-06-15 西安威尔罗根能源科技有限公司 一种钻井井筒直径的井径仪
CN102155215A (zh) * 2011-05-05 2011-08-17 沈阳新锦石油设备有限公司 水平井双井径测井仪

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102094633A (zh) * 2009-12-14 2011-06-15 西安威尔罗根能源科技有限公司 一种钻井井筒直径的井径仪
CN102155215A (zh) * 2011-05-05 2011-08-17 沈阳新锦石油设备有限公司 水平井双井径测井仪
CN102155215B (zh) * 2011-05-05 2013-05-08 沈阳新锦石油设备有限公司 水平井双井径测井仪

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