Fluid Calipers Benefits & Use



A fluid caliper is a survey to determine the volume of cement needed to circulate cement, to bring top of cement (TOC) to any desired height, or to circulate a liner on any stage of the well. Fluid calipers can be run to determine volumes on the surface, intermediate, or production strings of vertical and horizontal wells. It is effective, accurate, and pays for itself.


The Process:  

- While making a connection or circulating at TD we connect our calibrated flow meter and volume totalizer to the vibrating hose of the mud pump and insert the traceable marker (Oats).  Drilling or circulating may resume.  Once we retrieve the marker at flow line or shaker we are able to finalize our calculations.  

- We will deliver annular volumes in cubic feet, the average hole size, percent of hole washout, pump efficiency, and circulation time required.


Save Time and Money:   

- The fluid caliper pays for itself by accurately determining the volume needed for the job.  

- Prevents 1 inching and the rig time associated with them.  More affordable than open hole logs with no rig time needed.   


Two-Stage Cementing:  

- Run 2 fluid calipers -- 1st caliper at TD and 2nd caliper at depth of stage tool to determine volumes for top and bottom stages.



- Horizontal bores pose challenges for logging, but our fluid caliper can determine volumes beyond the curve.


Drilling in NM or other environmentally sensitive areas? 

- Run a fluid caliper to prevent circulating too much cement into the limited capacities of solid waste disposal pits.



Expert Calipers vs. Do-it-yourself Calipers:

Expert.  Our process and tools are specifically designed to give accurate results.  Hole Diameter, Pump Size, Mud Viscosity, Mud Weight, and Flow Rate will affect the fluid caliper and need to be factored into final calculations.  The flow meter and totalizer tally actual mud-pump volumes and pump efficiencies resulting in verifiable information.  


 Don’t fall for the do-it yourself caliper.  Untrained well-site personnel using stroke counters and sweeps or other “markers” could lead to costly mistakes.  Don’t come up short.  Let an expert do it!


Out performs open-hole logs:  

- Fluid calipers can determine volumes greater than that of the caliper log in areas with large amounts of washout.

- Hassle Free -- Logs can be stubborn to get down-hole and may even malfunction resulting in a fluid caliper anyway. Logs cannot be utilized past the curve of horizontal wells.