Anti-bit balling drilling fluids, and methods of making and use thereof

Patent metadata

Field	Value
Publication number	US-2018223160-A1
Application number	US-201815920879-A
Country	US
Kind code	A1
Filing date	Mar 14, 2018
Priority date	Feb 3, 2017
Publication date	Aug 9, 2018
Grant date	—

Abstract

Anti-bit balling drilling fluids and methods of making and using drilling fluids are provided. The anti-bit balling drilling fluid contains water, a clay-based component, and a polyethylene glycol having the formula: H—(O—CH2—CH2)n—OH, where n is an integer from 1 to 50.

First claim

1 . A drilling fluid comprising:
water; a clay-based component; and a polyethylene glycol comprising Formula (I):

where n is an integer from 1 to 50.

2 . The drilling fluid of claim 1 , where the polyethylene glycol has a weight average molecular weight of from 300 grams per mol (g/mol) to 500 g/mol, as measured according to GPC.

3 . The drilling fluid of claim 1 , where the drilling fluid comprises from 28 to 850 lb/bbl water based on total weight of the drilling fluid.

4 . The drilling fluid of claim 1 , where the drilling fluid comprises from 28 to 720 lb/bbl of the clay-based component based on total weight of the drilling fluid.

5 . The drilling fluid of claim 1 , where the drilling fluid comprises from 0.02 to 180 lb/bbl of the polyethylene glycol, based on total weight of the drilling fluid.

6 . The drilling fluid of claim 1 , where the clay-based component comprises one or more components selected from the group consisting of lime (CaO), CaCO 3 , bentonite, montmorillonite clay, barium sulfate (barite), hematite (Fe 2 O 3 ), mullite (3Al 2 O 3 .2SiO 2 or 2Al 2 O 3 .SiO 2 ), kaolin, (Al 2 Si 2 O 5 (OH) 4 or kaolinite), alumina (Al 2 O 3 , or aluminum oxide), silicon carbide, tungsten carbide, and combinations thereof.

7 . The drilling fluid of claim 1 , further comprising at least one or more additives selected from the group consisting of weighting agents, fluid loss control agents, lost circulation control agents, viscosifiers, dispersants, pH buffers, electrolytes, glycols, glycerols, dispersion aids, corrosion inhibitors, defoamers, deformers, starches, xanthan gum polymers, other specialty additives, and combinations thereof.

8 . The drilling fluid of claim 1 , where the drilling fluid has an accretion percentage of less than or equal to 18%.

Assignees

• Saudi Arabian Oil Co

Inventors

• Al-Yami Abdullah
• Ba Hamdan Abdulaziz A
• Haidary Saleh A
• Wagle Vikrant
• Albahrani Hussain
• Safran Ali
• Alhareth Nasser
• Awadh Abdulla H

Classifications

• C09K8/514

  of natural origin, e.g. polysaccharides, cellulose (C09K8/512 takes precedence) · CPC title

• C09K8/035

  Organic additives · CPC title

• C10N2020/017

  Specific gravity or density · CPC title

• C10N2020/02

  Viscosity; Viscosity index · CPC title

• C10N2040/22

  with essential removal of material {, e.g. cutting, grinding or drilling} · CPC title