CN204571831U - 一种螺杆钻具密封传动轴 - Google Patents

一种螺杆钻具密封传动轴 Download PDF

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CN204571831U
CN204571831U CN201520248284.6U CN201520248284U CN204571831U CN 204571831 U CN204571831 U CN 204571831U CN 201520248284 U CN201520248284 U CN 201520248284U CN 204571831 U CN204571831 U CN 204571831U
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main shaft
bearing
hydraulic motor
helicoid hydraulic
hermetically
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袁雷
魏岳
岳林
于卫东
孙京锋
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DEZHOU UNITED PETROLEUM TECHNOLOGY Corp.
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DEZHOU UNITED PETROLEUM MACHINERY Co Ltd
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Abstract

一种螺杆钻具密封传动轴,涉及石油钻探领域,它包括主轴以及套装在主轴上的外壳体,所述的外壳体上下两端和主轴之间分别设有密封结构,上下两端的密封结构与外壳体和主轴之间形成密封腔,主轴的中部的外周上设有安装防掉挡环的凹槽,防掉挡环的上方依次设置上推力轴承和止推环,防掉挡环的下方依次设置下推力轴承、不锈钢耐腐蚀轴承。所述防掉挡环包括两个半环,两个半环分别通过内六角螺钉固定在主轴上。所述的外壳体包括上壳体和下壳体。上壳体外设有可更换保护套。主轴的下端密封结构的下方设有TC轴承内套和TC轴承。本实用新型缩短了传动轴总成的整体长度,使钻头距螺杆钻具弯点的距离缩短,增加钻井造斜率。

Description

一种螺杆钻具密封传动轴
技术领域
[0001] 本实用新型涉及石油钻探领域,具体说是一种螺杆钻具密封传动轴。
背景技术
[0002] 螺杆钻具是目前钻井工程中广泛使用的一种井下动力钻具,广泛应用在直井、定向井、水平井、从式井、修井、各种管道的穿越施工等钻井作业。螺杆钻具包括旁通阀总成、马达总成、万向轴总成、传动轴总成四大部分。目前常用的螺杆钻具传动轴为开式传动轴,主要包括主轴、下TC轴承内、保护套、壳体、防掉结构、串轴承、上TC内、外轴承套和上固定螺母等组成。钻井过程中,串轴承、上下TC轴承依靠泥浆润滑,由于泥浆中含有多的微小岩石颗粒对串轴承和上下TC轴承形成摩擦,并且泥浆具有化学腐蚀性,大大降低了轴承的使用寿命,从而影响螺杆钻具的使用寿命。
实用新型内容
[0003] 为了克服上述现有技术存在的缺点,本实用新型的目的在于提供一种螺杆钻具密封传动轴,它缩短了传动轴总成的整体长度,使钻头距螺杆钻具弯点的距离缩短,增加钻井造斜率。
[0004] 为了解决上述问题,本实用新型采用以下技术方案:一种螺杆钻具密封传动轴,其特征是,包括主轴以及套装在主轴上的外壳体,所述的外壳体上下两端和主轴之间分别设有密封结构,上下两端的密封结构与外壳体和主轴之间形成密封腔,主轴的中部的外周上设有安装防掉挡环的凹槽,防掉挡环的上方依次设置上推力轴承、止推环和圆柱滚子轴承,防掉挡环的下方依次设置下推力轴承、耐腐蚀轴承。
[0005] 进一步的:所述的防掉挡环包括两个半环,两个半环分别通过内六角螺钉固定在主轴上。
[0006] 进一步的:所述的外壳体包括上壳体和下壳体。
[0007] 进一步的:所述的上壳体外设有可更换保护套。
[0008] 进一步的:所述的主轴上端的密封结构包括加强齿形组合密封圈A、0型橡胶圈A、滚针轴承座、滚针轴承、弹性挡圈。
[0009] 进一步的:所述的主轴下端的密封结构包括加强齿形组合密封圈B。
[0010] 进一步的:所述的主轴的下端密封结构的下方设有TC轴承内套和TC轴承。
[0011] 进一步的:所述的主轴上设有泥浆通路,所述的泥浆通路分别连通主轴下端的密封结构与TC轴承之间的空腔和主轴的内腔。
[0012] 进一步的:所述的外壳体上设有注油孔。
[0013] 本实用新型的有益效果是:
[0014] 1、上下两端的密封结构与外壳体和主轴之间形成密封腔,密封腔内的轴承组件浸在密封的油腔中,不接触泥浆,提高了轴承组件的寿命。
[0015] 2、所述滚针轴承保证了在使用过程中滚针轴承座上的橡胶密封件不会因为主轴偏磨而缩短使用寿命,从而加强了密封效果。
[0016] 3、主轴设有防掉挡环,所述防掉挡环由两个半环靠内六角螺钉固定在主轴上,可以有效的防止主轴意外断裂造成的掉井事故。
[0017] 4、上壳体外设有可换型保护套,可有效保护上壳体,防止上壳体磨损导致整个传动轴总成报废,同时可根据需要更换为扶正器。
[0018] 5、防掉挡环上下设有上推力轴承、下推力轴承,取消了串轴承,缩短了传动轴总成的长度。
[0019] 6、下端设有耐腐蚀轴承、TC轴承对该总成进行径向扶正,TC轴承使用泥浆润滑,TC轴承除了起径向扶正作用以外,还可以保护下壳体上的密封装置不受岩肩冲蚀,所述耐腐蚀轴承、TC轴承保证了主轴运转过程中的稳定性,增加了该总成的使用寿命。
附图说明
[0020] 下面结合附图和实施例对本实用新型做进一步的说明:
[0021] 图1是本实用新型的剖视图;
[0022] 图2为本实用新型的防掉挡环的结构示意图。
[0023] 图中:1上壳体,2主轴,3加强齿形组合密封圈A,4 O型橡胶圈A,5滚针轴承座,6滚针轴承,7弹性挡圈,8圆柱滚子轴承,9止推环,10上推力轴承,11防掉挡环,12内六角螺钉,13下推力轴承,14 TC轴承内套,15可更换保护套,16耐腐蚀轴承,17下壳体,18注油孔,19加强齿形组合密封圈B,20TC轴承,21泥浆通路。
具体实施方式
[0024] 如图1、图2所示,一种螺杆钻具密封传动轴,包括主轴2以及套装在主轴2上的外壳体,所述的外壳体上下两端和主轴2之间分别设有密封结构,上下两端的密封结构与外壳体和主轴2之间形成密封腔,所述的主轴2上端的密封结构包括加强齿形组合密封圈A 3、O型橡胶圈A 4、滚针轴承座5、滚针轴承6、弹性挡圈7。所述的主轴2下端的密封结构包括加强齿形组合密封圈B 19。
[0025] 所述的外壳体上设有注油孔。外壳体包括上壳体I和下壳体17,所述的上壳体I外设有可更换保护套15。主轴2的中部的外周上设有安装防掉挡环11的凹槽,所述的防掉挡环11包括两个半环,两个半环分别通过内六角螺钉12固定在主轴上。
[0026] 防掉挡环11的上方依次设置上推力轴承10、止推环9和圆柱滚子轴承8,防掉挡环11的下方依次设置下推力轴承13、耐腐蚀轴承16。
[0027] 所述的主轴2的下端密封结构的下方设有TC轴承内套14和TC轴承20。所述的主轴2上设有泥浆通路21,所述的泥浆通路21分别连通主轴2下端的密封结构与TC轴承20之间的空腔和主轴2的内腔。
[0028] 本实用新型不仅仅局限于上述实施例。

Claims (9)

1.一种螺杆钻具密封传动轴,其特征是,包括主轴以及套装在主轴上的外壳体,所述的外壳体上下两端和主轴之间分别设有密封结构,上下两端的密封结构与外壳体和主轴之间形成密封腔,主轴的中部的外周上设有安装防掉挡环的凹槽,防掉挡环的上方依次设置上推力轴承和止推环,防掉挡环的下方依次设置下推力轴承、不锈钢耐腐蚀轴承。
2.根据权利要求1所述的一种螺杆钻具密封传动轴,其特征是,所述防掉挡环包括两个半环,两个半环分别通过内六角螺钉固定在主轴上。
3.根据权利要求1或2所述的一种螺杆钻具密封传动轴,其特征是,所述的外壳体包括上壳体和下壳体。
4.根据权利要求3所述的一种螺杆钻具密封传动轴,其特征是,所述的上壳体外设有可更换保护套。
5.根据权利要求1或2所述的一种螺杆钻具密封传动轴,其特征是,所述的主轴上端的密封结构包括加强齿形组合密封圈A、O型橡胶圈A、滚针轴承座、滚针轴承、弹性挡圈。
6.根据权利要求1或2所述的一种螺杆钻具密封传动轴,其特征是,所述的主轴下端的密封结构包括加强齿形组合密封圈B。
7.根据权利要求1或2所述的一种螺杆钻具密封传动轴,其特征是,所述的主轴的下端密封结构的下方设有TC轴承内套和TC轴承。
8.根据权利要求7所述的一种螺杆钻具密封传动轴,其特征是,所述的主轴上设有泥浆通路,所述的泥浆通路分别连通主轴下端的密封结构与TC轴承之间的空腔和主轴的内腔。
9.根据权利要求1或2所述的一种螺杆钻具密封传动轴,其特征是,所述的外壳体上设有注油孔。
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