The utility model relates to a safety valve for drilling, in particular to a low torque fixed ball valve for drilling. The device short circuit inside the body step is installed on the supporting frame, the supporting frame is installed under the base, under the valve seat is arranged on the lower base, the lower end of the spring on the base, the upper end of the spring on the seat, the shaft hole on both sides of the supporting frame arranged on the side wall is provided with a sliding bearing, the center of the sphere open channel, on both sides of sphere is processed with a shaft hole, shaft hole and the shaft hole on the side wall of the supporting frame on both sides of it and will be fixed on both sides of the shaft were put into operation keys, through the short side of the convex body and the fixed shaft with operation keys connected with an operating handle, the upper supporting frame installed on the base, the base. Installed at the lower end of the upper valve seat. The utility model realizes bidirectional sealing of the upper and the lower valve seats, the sealing effect is good, the torque is small, the valve seat is not easy to deform, and the service life is long. The utility model overcomes the defects that the existing floating ball valve has poor sealing effect, big torque and easy deformation of the valve seat.
【技术实现步骤摘要】
:本技术涉及一种钻井用安全阀,特别涉及一种钻井用低扭矩固定球阀。
技术介绍
:在常规石油钻井过程中,为保证钻井安全,在钻具上常使用安全阀,安全阀为浮动式球阀结构,球体与阀座间硬密封,球体在压力下可上下浮动,下阀座通过波形簧提供一定的预压力,但目前使用的球阀在高压情况下普遍存在阀座易变形,球与阀座间易咬死,转动时扭矩大易失效等问题,严重影响球阀的使用效果及井下安全。
技术实现思路
:本技术要解决的技术问题是提供一种钻井用低扭矩固定球阀,该装置实现了上下阀座双向密封,密封效果好,转矩小,阀座不易变形,使用寿命长。克服了现有浮动式球阀密封效果差,转矩大,阀座易变形的不足。本技术所采取的技术方案是:一种钻井用低扭矩固定球阀,包括球体和短接本体;短接本体内部台阶上安装有支承架,支承架下端内部安装有下底座,下底座上安装下阀座,弹簧下端顶在下底座上,弹簧上端顶在下阀座上,支承架两侧侧壁上开有安装有滑动轴承的轴孔,球体中心开有通道,球体两侧加工有轴孔,该轴孔与支承架两侧侧壁上的轴孔对正并将两侧的固定轴分别装入,操作键穿过短接本体与一侧的固定轴凹凸配合,操作键连接操作手柄,支承架上端安装上底座,上底座下端安装上阀座,下阀座上端和上阀座下端均通过球面密封与球体之间密封,支承架上端外壁上安装有锁簧,上底座上端安装有开口挡圈、挡圈和孔用弹性挡圈。本技术的有益效果是:本技术由于采用了固定球体和浮动式阀座的设 ...
【技术保护点】
一种钻井用低扭矩固定球阀,包括球体(6)和短接本体(12);其特征在于:短接本体(12)内部台阶上安装有支承架(1),支承架(1)下端内部安装有下底座(2),下底座(2)上安装下阀座(3),弹簧(11)下端顶在下底座(2)上,弹簧(11)上端顶在下阀座(3)上,支承架(1)两侧侧壁上开有安装有滑动轴承(10)的轴孔,球体(6)中心开有通道,球体(6)两侧加工有轴孔,该轴孔与支承架(1)两侧侧壁上的轴孔对正并将两侧的固定轴(7)分别装入,操作键(17)穿过短接本体(12)与一侧的固定轴(7)凹凸配合,操作键(17)连接操作手柄(16),支承架(1)上端安装上底座(8),上底座(8)下端安装上阀座(4),下阀座(3)上端和上阀座(4)下端均通过球面密封(5)与球体(6)之间密封,支承架(1)上端外壁上安装有锁簧(9),上底座(8)上端安装有开口挡圈(13)、挡圈(14)和孔用弹性挡圈(15)。
【技术特征摘要】
1.一种钻井用低扭矩固定球阀,包括球体(6)和短接本体(12);其特征
在于:短接本体(12)内部台阶上安装有支承架(1),支承架(1)下端内部安
装有下底座(2),下底座(2)上安装下阀座(3),弹簧(11)下端顶在下底座
(2)上,弹簧(11)上端顶在下阀座(3)上,支承架(1)两侧侧壁上开有安
装有滑动轴承(10)的轴孔,球体(6)中心开有通道,球体(6)两侧加工有轴
孔,该轴孔与支承架(1)两侧侧壁上的轴...
【专利技术属性】
技术研发人员:张微,李彬,姚建鹏,曾艳春,陆洋阳,王佳露,吕楠,张凤,齐海鹰,
申请(专利权)人:中国石油集团长城钻探工程有限公司,
类型:新型
国别省市:辽宁;21
还没有人留言评论。发表了对其他浏览者有用的留言会获得科技券。