At the heart of Ziebel’s proprietary technology is the
Z-Rod® is manufactured in a tightly controlled continuous process to achieve consistent properties over the typical finished length of 20,000ft. The rod is semi-stiff and has no “memory”, which means it can be coiled on a 12’ drum, but when uncoiled it will straighten without trying to hold its previous bend like steel coil tubing.
Z-Rod® is stiff enough to be pushed out into the horizontal sections of wells until frictional forces cannot be overcome. The reach limits are determined by the internal diameter of the pipe, the condition and roughness of the internal surface and the amount of debris in the hole. Ziebel simulates the expected horizontal reach of the rod by running IDEX software model which predicts when the available push (compressive load) from the surface will be unable to overcome the frictional resistance and the rod lock-up in a similar manner to coil tubing. Unless there are obstructions in the well this typically produces accuracies of 95% in reach estimates.
The carbon rod has been tested for compatibility with 15% HCL acid wash and with scale inhibitor chemical cocktails, which offers the possibility of real-time stimulation monitoring while these treatments are bull-headed from the surface, to confirm the effectiveness of any diversion methods employed and that the fluids are being delivered to their target zones correctly. It is also immune to H2S.
|Carbon fiber reinforced polymer|
|Length||Up to 20,500’|
|Weight in air||188 lbs / 1000 ft|
|Tensile load capacity||>10 tons|
|Compression load capacity||1100 - 2200lbs|
|RIH/POOH speeds||0-130 feet/minute|
|Fibre Optics within the carbon rod||2 x Multi-mode|
4 x Single-mode
|Operating temperature rating||275⁰F Maximum|
|Operating pressure rating||10,000 psi|
|Chemical Resistance||H2S, HCL, CO2 and Scale Inhibitor|