Solids in borehole fluids
A wellbore fluid and drilling fluid technology, applied in the direction of flushing wellbore, wellbore/well components, drilling composition, etc., can solve problems such as formation fracture, hydrostatic pressure drop, drilling fluid loss, etc.
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Embodiment 1
[0087] The drilling fluid contains approximately 100 g / L of inorganic solids having an average particle size of 100 microns to 500 microns. The liquid also contains:
[0088] (a) 10 grams per liter of organic polymer objects passed as referenced above Figure 5 and 6 Described as being cut from recycled plastic and having dimensions to fit in a 2mm diameter sphere but too large to fit in a 1mm diameter sphere, along with
[0089] (b) 10 g / l of organic polymer objects also passed as referenced above Figure 5 and 6 The described was made from recycled plastic sheared, but was of a size that would fit in a 5mm diameter sphere but was too large to fit in a 3mm diameter sphere.
[0090] as by figure 1 Illustratively, drilling fluids are used in drilling. If a fracture with a width of 1 to 4 mm is encountered or formed as a result of pressure in the wellbore, the polymer object (a) will be transported into the fracture but will form a plug at the fracture entrance. Shapes wi...
Embodiment 2
[0093] Another drilling fluid also contained about 100 grams / liter of inorganic solids having an average particle size of 100 microns to 500 microns. This liquid also contains:
[0094] (a) 10 grams per liter of organic polymer objects passed as referenced above Figure 5 and 6 Described as being cut from recycled plastic and having dimensions to fit in a 2mm diameter sphere but too large to fit in a 1mm diameter sphere, along with
[0095] (b) 5 g / L as shown in Figure 10 An organic polymer object in , having a size that fits into a 6 mm diameter sphere but is too large to fit into a 3 mm diameter sphere.
[0096] Again, if a larger fissure with a width of 4 to 8 mm is encountered or formed, object (b) will be transported into the fissure but will form an embolism at the fissure entrance. The smaller objects (a) will get stuck in the gaps between the larger objects (b) forming porous bridges which will then retain the smaller inorganic particles and thus form further leak...
Embodiment 3
[0098] Another drilling fluid also contained about 100 grams / liter of inorganic solids having an average particle size of 100 microns to 500 microns. This liquid also contains:
[0099] (a) 5 g / L as shown in Figure 11 An organic polymer object in , having a size that fits into an 8 mm diameter sphere but is too large to fit into a 5 mm diameter sphere,
[0100] (b) 5 g / L as shown in Figure 10 An organic polymer object in , having a size that fits into a 6mm diameter sphere but is too large to fit into a 4mm diameter sphere, and
[0101] (c) 10 g / l of organic polymer objects passed as referenced above Figure 5 and 6 The described ones were cut from recycled plastic and were of a size that would fit in a 2 mm diameter sphere but were too large to fit in a 1 mm diameter sphere.
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Abstract
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