VERSAWET
Oil-based mud surfactant
Oil-wet barite and drill solids and reduce the adverse effects of water contamination.
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 |
Specific gravity | 1.0–1.1 |
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 gpb [80 L/m3] to 4.0–4.5 gpb [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, ppg 8 | Diesel Oil, bbl 0.620 | PIPE-LAX W Fluid, galUS 3.36 | Freshwater, bbl 0.280 | M-I Bar Barite, lbm 25.6 |
Mud Weight, ppg 10 | Diesel Oil, bbl 0.580 | PIPE-LAX W Fluid, galUS 3.36 | Freshwater, bbl 0.260 | M-I Bar Barite, lbm 138.6 |
Mud Weight, ppg, 12 | Diesel Oil, bbl 0.540 | PIPE-LAX W Fluid, galUS 3.36 | Freshwater, bbl 0.220 | M-I Bar Barite, lbm 248.5 |
Mud Weight, ppg 14 | Diesel Oil, bbl 0.490 | PIPE-LAX W Fluid, galUS 3.36 | Freshwater, bbl 0.210 | M-I Bar Barite, lbm 349.3 |
Mud Weight, ppg 16 | Diesel Oil, bbl 0.510 | PIPE-LAX W Fluid, galUS 3.36 | Freshwater, bbl 0.110 | M-I Bar Barite, lbm 458.5 |
Mud Weight, ppg 18 | Diesel Oil, bbl 0.440 | PIPE-LAX W Fluid, galUS 3.36 | Freshwater, bbl 0.100 | M-I Bar Barite, lbm 567 |
Mud Weight, sg | Diesel Oil, L | PIPE-LAX W Fluid, L |
Freshwater, L | M-I Bar Barite, kg |
---|---|---|---|---|
Mud Weight, sg 0.96 | Diesel Oil, L 620 | PIPE-LAX W Fluid, L 80 |
Freshwater, L 280 | M-I Bar Barite, kg 73 |
Mud Weight, sg 1.20 | Diesel Oil, L 580 | PIPE-LAX W Fluid, L 80 |
Freshwater, L 260 | M-I Bar Barite, kg 396 |
Mud Weight, sg 1.44 | Diesel Oil, L 540 | PIPE-LAX W Fluid, L 80 |
Freshwater, L 220 | M-I Bar Barite, kg 710 |
Mud Weight, sg 1.68 | Diesel Oil, L 490 | PIPE-LAX W Fluid, L 80 |
Freshwater, L 210 | M-I Bar Barite, kg 995 |
Mud Weight, sg 1.92 | Diesel Oil, L 510 | PIPE-LAX W Fluid, L 80 |
Freshwater, L 110 | M-I Bar Barite, kg 1,310 |
Mud Weight, sg 2.16 | Diesel Oil, L 440 | PIPE-LAX W Fluid, L 80 |
Freshwater, L 100 | M-I Bar Barite, kg 1,620 |
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.