Spotting Fluid Supplier and Manufacturer

Spotting Fluid


SPOTTING FLUID is used in diesel oil or in oil-base muds to form a highly effective stuck-pipe spotting fluid. Spotting Fluid enables spotting fluids to penetrate and “crack” the water-base-mud filter cake with an extremely high-fluid-loss and solids-free filtrate. These features allow the Spotting Fluid and oil solution to pass through the waterbase mud filter cake between the stuck pipe and wellbore wall to facilitate freeing differentially stuck pipe. 


SPOTTING FLUID is a convenient and easy to use liquid product that is effective in very small concentrations and has an excellent success record. The recommended concentration is 1 gal (3.8 l) Spotting Fluid for each bbl (0.16 m3) of spotting fluid to be prepared. Laboratory data indicates that Spotting Fluid does not become more effective at concentrations higher than this 1-to-1 ratio. This easy-to-use product, with its convenient 1-gallon-to-1-barrel ratio, is preferred over sacked spotting fluid products which require more time to mix, with more detailed formulations and mixing instructions.
The unique properties of Spotting Fluid (mixed with mineral oil, diesel oil, crude oil or oil-base drilling fluid) make it a superior product for preparing a spotting fluid or soak solution for freeing pipe that is differentially stuck. It forms a spotting fluid with a high-fluid-loss, solids free filtrate that penetrates and "cracks" the water-base filter cake, allowing the lubricating solution to equalize differential pressure rapidly and reduce the forces required to free differentially stuck pipe.


Specific Gravity                0.9 (S.G)
pH (1% Solution)              5.6 – 6.6
Flash Point                      140°F (60°C) (PMCC).
Pour Point                       <15°F (<-9°C).
Physical State : The Material shall be homogeneous free flowing liquid at 24 ± 2 °C ,Dark brown liquid free from visible impurities.
Miscibility with HSD Oil                                                                                                            : Completely                                                                                                                                                  miscible.
Interfacial Tension    of Distilled Water — HSD Oil containing 2.5%(w/v) Spotting Fluid, dynes / cm   : 13 (Maximum).

Lubricity Coefficient of Treated Bentonite Suspension:
A Bentonite Suspension (prepared by dilution of Pre- hydrated Bentonite with Distilled Water) having Apparent Viscosity of 15 cP is treated with 1%    (w/v) of the Additive and its Lubricity Coefficient is measured on a Lubricity Tester.
Lubricity Coefficient of the treated bentonite suspension should not be more than 0.11.
Mud Cake Cracking Test:
Prepare a Bentonite Suspension having Apparent Viscosity 15 cP by diluting Bentonite gel (pre-hydrated at 90 ± 2°C for 72 hours) with Distilled Water and load it to Specific Gravity 1.20 with Barytes. Obtain a Filter Cake of this Mud in the API Filter Loss Apparatus by carrying out filtration for 30 minutes at 100 psi pressure (use Whatman No. 1 filter paper).
Throw the Mud away, wash the Mud Cake with a slow stream of water without removing the Mud Cake from the Cell and fill the Cell with 100 m/HSD oil containing 2.5% (w/v) Spotting Fluid. Apply 100 psipressure, after closing the Cell and determine the Time required for collection of 100 ml filtrate.
Filtration time should not be more than 50 minutes.
Sticking Test:
Prepare loaded Bentonite Suspension of Specific Gravity 1.20 as in the case of Mud Cake Cracking Test and fin it in a Sticking Tester. Form a Filter Cake by applying 500    psi pressure for 30 minutes. Stick the plate by pressing it on the cake for 5 minutes and leave for 1 hour under 500 psipressure. Then release the pressure, drain off Mud from the cell by opening the bottom and top stoppers. Replace the bottom stopper and fin the cell with 100 mlof HSD Oil containing 2.5% (w/v) of the Sample of Spotting Fluid. Close the top stopper and again apply 500    psipressure. Note the time for release of stuck plate and if not released in 20 minutes , apply torque with a Torque Wrench.
Torque required for release of the stuck plate should not be more than 65 inch-pounds.


May be used in diesel oil, mineral oil, crude oil and oil-base muds
May be used in weighted oil-base fluids where well control considerations require weighted fluids
Convenient liquid additive, quick and easy to mix at the rigsite
Easy to remember 1-gallonto- 1-barrel ratio
Has an approximate 85% success ratio
Results in less time lost due to stuck pipe


Although unweighted spotting fluids are more effective, the reduction in hydrostatic pressure with an unweighted spotting fluid may be intolerable due to well control or regulatory requirements. For these instances, a weighted spotting fluid of SPOTTING FLUID in oil-base mud should be used.
Environmental restrictions concerning the use of oils and oil-base fluids should be considered, since SPOTTING FLUID is used in conjunction with oil.


Bioassay information is available upon request. Handle as an industrial chemical, wearing protective equipment and observing the precautions as described on the Transportation and Material Safety Data Sheet (MSDS). Because SPOTTING FLUID contains refined oil and is used in oil and oil-base fluids, this product and the spotting fluids formulated with this product should be used in accordance with applicable environmental regulations and considerations.

WARNING! Combustible liquid and vapor. Contains diesel fuel oil, inhalation of which may cause cancer. Material is an irritant.


Spotting Fluid is packaged in 55‐gal (208‐L) drums. Store in dry, well ventilated area. Keep container closed Store in a location away from sources of heat or ignition. Store away from incompatibles. Follow safe warehousing practices regarding palletizing, banding, shrink wrapping and/or stacking.

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