Oil-based mud surfactant
Oil-wet barite and drill solids and reduce the adverse effects of water contamination.
Stuck-pipe spotting fluid
PIPE-LAX W EH stuck-pipe spotting fluid is a liquid one-drum product for preparing weighted oil-based spotting fluids. It contains gellants, emulsifiers, wetting agents and filtercake-breaking materials. PIPE-LAX W EH spotting fluid can be mixed in diesel oil or mineral oil without special rig or mixing equipment.
|Typical Physical Properties|
|Physical appearance||Dark-brown, oily liquid|
|Pour point||<32 degF [0 degC]|
|Flash point||84 degF [29 degC] (Pensky–Martens closed cup)|
Success in freeing differentially stuck pipe is greatest when the soaking solution is spotted in the minimum amount of time after the pipe becomes stuck. A soak solution that can be quickly mixed and spotted often frees the drillstring before fishing operations are required. Because PIPE-LAX W EH spotting fluid is a single-package liquid blend, it is easy to mix and prepare quickly.
PIPE-LAX W EH spotting fluid yields excellent oil-wetting characteristics and is formulated to ensure rapid penetration through the filtercake to the formation. The quantity of the PIPE-LAX W EH spotting fluid (50–200 bbl [8–32 m3]) should be placed in the annulus around the suspected stuck pipe area, and one or two barrels of fresh spotting fluid should be pumped every hour. PIPE-LAX W EH spotting fluid remains effective when contaminated by water-based mud.
The chart below lists the required quantities for formulating one barrel of PIPE-LAX W EH solution in diesel oil with M-I BAR barite. This formulation is designed to produce the minimum viscosity required to support weight material. The concentration of PIPE-LAX W EH stuck- pipe additive should be increased from 3.36 galUS/bbl [80 L/m3] to 4.0–4.5 galUS/bbl [95–107 L/m3] when higher viscosities are required or if mineral oil is being used. If it is necessary to reduce the viscosity of PIPE-LAX W EH fluid, dilution with oil or the addition of 0.25–0.5 lbm/bbl [0.71–1.43 kg/m3] of VERSAWET oil-based mud surfactant is recommended.
|Mud Weight, ppg||Diesel Oil, bbl||PIPE-LAX W Fluid, galUS||Freshwater, bbl||M-I BAR Barite, lbm|
|Mud Weight, sg||Diesel Oil, L||PIPE-LAX W Fluid, L
||Freshwater, L||M-I BAR Barite, kg|
More spotting fluid may be required in low-toxicity mineral oils to obtain the desired rheological properties and gel strengths.
Preparing PIPE-LAX W EH fluid is quick and simple.
Most frequently, it is the drill collars that become differentially stuck. The placement of a PIPE-LAX W EH fluid is relatively simple.
Bioassay information is available upon request. Handle as an industrial chemical, wearing protective equipment and observing the precautions described in the safety data sheet.
PIPE-LAX W EH spotting fluid is packaged in 55-galUS [208-L] drums.
Keep away from heat, sparks, and open flame. Keep in cool, dry, ventilated storage area and in closed containers. Keep in original container.