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Dynamic Torque Anchor (DTA)
| The Dynamic Torque Anchor has been developed to provide a simple and reliable solution for tuning back-off when progressing cavity pumps are used. The unique patented design allows for easy running and retrieval in a variety of downhole conditions including: 1. Deep Wells
2. Horizontal Wells
3. Heavy Oil
The Dynamic Torque Anchor allows for full bore configuration, maximum bypass in the annulus and its function is not affected by the presence of produced sand.
The Dynamic Torque Anchor uses wedge shaped anchoring blocks which bite into the casing wall when right hand torque is generated in the tubing string. These anchoring blocks are spring loaded so that transfer of torque to the casing is immediate (clockwise) and the tubing string may be freely rotated to the left (counterclockwise). Due to the original design of the anchoring blocks, only a simple engaging and disengaging procedure is required.
The running procedure of the Dynamic Torque Anchor is as simple as the design itself. The anchor is installed below the pump and can be run in and out of the well freely as shown in Figure 1A. When the anchor has reached the required depth, the application of approximately 300ft-lbs right hand torque, will securely engage the anchoring blocks to the casing wall, as illustrated in Figure 1B. The setting torque may now be locked in and the pump operation started.
To disengage the anchor, simply stop the pump operation and relax initial setting torque.
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