Double Action Hydraulic Hammer
The Hydraulic Double Action Hammer (HJDA) is a bi-directional hammer with hydraulic retardation without a mechanical safety mechanism. This hammer allows the operator to apply variable impact force up and down. The HJDA hammer is intended for use in highly deviated or high-friction wells where conditions may prevent the application of sufficient force to activate the mechanical latch.
Constructed to strict CSA, API, and ASTM design, test, and manufacturing standards and supplied in long-length continuous spools or standard-length bars, our line pipe is simple and quick to install and deploy.
- The HJDA hammer is hydraulically controlled in both directions, with the impact force controlled by the operator.
- Impact force is controlled by a metering mechanism that ensures consistent lag times over a wide range of operating temperatures.
- The HJDA hammer operates in a simple up and down motion and is not affected by pipe torque.
- Standard seals are effective up to 120°C. The HMJ hammer can be configured with high temperature seals up to 200°C. External seal surfaces are coated with tungsten carbide to improve corrosion and wear resistance.
With the hammer in the neutral position, apply the desired pull on the free weight of the string, beginning the hydraulic retardation sequence. At the end of the hydraulic delay, the hammer will activate causing an upward impact force.
If necessary, lower the string enough to close the hammer to the neutral position and ready it for the next cycle.
- With the hammer in the neutral position, lower the string to apply the necessary downward force, beginning the hydraulic lag sequence. At the end of the hydraulic delay, the hammer will activate causing a downward impact force.
- If necessary, raise the string enough to open the hammer to the neutral position and ready it for the next cycle.