Pressure measuring instrument for oil and water well. The utility model mainly solves the problem that the existing wellhead pressure taking device is easy to leak. It is characterized in that the main body (1) has stepped hole (3), the lower end of the axial stepped hole (3) having a long neck through the built-in piston (4), a piston (4) through the upper end of the ring-shaped convex table (7), the lower part of the outer annular groove and a seal ring, a piston (4) through the upper end of the step hole (3) in spring (5), (5) the upper end of the pressure spring and the stepped hole (3) connected to the spring cap (6). The utility model has the advantages of no leakage, no leakage, simple structure and low cost under the condition of high pressure.
【技术实现步骤摘要】
【技术保护点】
１．一种油水井取压测压器，包括下部外有螺纹上端连接有压力表短接（２）的主体（１），其特征在于：主体（１）内轴向有阶台孔（３），下端阶台孔（３）内置有长颈直通活塞（４），长颈直通活塞（４）上端有环形凸台（７），下部外环形凹槽内有密封圈，长颈直通活塞（４）上端阶台孔（３）内有压簧（５），压簧（５）上端有与阶台孔（３）相连的簧帽（６）。
【技术特征摘要】
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