利索-全球专利检索

  1. 登录
  2. 注册
发明公开
CN103437743A 用于压力起爆装置和反循环阀的剪切式压力动作机构 无效 - 撤回

用于压力起爆装置和反循环阀的剪切式压力动作机构
摘要：
本发明涉及一种用于压力起爆装置和反循环阀的压力动作机构，其特征在于：活塞套内腔的内径具有内径差，形成一个台阶，台阶，台阶上设有剪切片，剪切活塞位于剪切片上，活塞套与剪切活塞之间设有压边圈。本发明以剪切片式压力动作机构，可以替代在原来压力激发式起爆装置和泵压式反循环阀中采用的剪切销式压力动作机构。该剪切片被压边圈压紧在活塞套内，当剪切活塞在压力作用下对剪切片进行剪切时剪切片不会产生任何方向的位移，提高了施加剪切压力精度，减小井口加压误差。
摘要（英）：

The invention relates to a pressure actuating mechanism used for a pressure detonation device and a reverse circulation valve. The pressure actuating mechanism is characterized in that as the inner diameter of an inner cavity of a piston bush has inner diameter difference, a step is formed; the step is provided with a shear blade; a shear piston is located on the shear blade; a blank holder is arranged between the piston bush and the shear piston. According to the pressure actuating mechanism used for the pressure detonation device and the reverse circulation valve provided by the invention, a shear pin-type pressure actuating mechanism adopted in an original pressure excitation-type detonation device and an original pump pressure-type reverse circulation valve can be replaced with a shear blade-type pressure actuating mechanism. The shear blade is compressed in the piston bush by the blank holder, and thus, when the shear blade is sheared by the shear piston under the action of pressure, the shear blade cannot shift in any directions, and therefore, the precision of applied shear pressure is improved, and a wellhead pressurization error is reduced.

0/0