Development of anti-bit balling fluids

Patent metadata

Field	Value
Publication number	US-2018223161-A1
Application number	US-201815922065-A
Country	US
Kind code	A1
Filing date	Mar 15, 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 at least one of a surfactant having the formula: R—(OC2H4)x—OH, where R is a hydrocarbyl group having from 10 to 20 carbon atoms and x is an integer from 1 and 10, or a polyethylene glycol having the formula: H—(O—CH2—CH2)n—OH, where n is an integer from 1 to 50. Methods of making and using these drilling fluids are also provided.

First claim

1 . A method of producing a drilling fluid, the method comprising:
mixing water, a clay-based component, and at least one of a surfactant comprising Formula (I):
R—(OC 2 H 4 ) x —OH  Formula (I)

where R is a hydrocarbyl group having from 10 to 20 carbon atoms,
x is an integer from 1 and 10, or
a polyethylene glycol comprising Formula (II):

where n is an integer from 1 to 50, to produce the drilling fluid.

2 . The method of claim 1 , where the surfactant has an HLB of from 8 to 16.

3 . The method of claim 1 , where R is:
an alkyl group comprising 12 to 15 carbons; or an alkenyl group comprising from 12 to 15 carbon atoms.

4 . The method of claim 1 , where x is from 5 to 10.

5 . The method of claim 1 , where the surfactant has an HLB of from 13 to 15.

6 . The method of claim 1 , where the surfactant comprises ethylene oxide condensate of branched isotridecyl alcohol.

7 . The method 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.

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

9 . The method 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.

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

11 . The method 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.

12 . The method of claim 1 , further comprising mixing 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, xanthum gum polymers, other specialty additives, and combinations thereof.

13 . The method 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

• C10N2050/013

  Water-in-oil · CPC title

• C10N2040/22

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

• C10N2020/02

  Viscosity; Viscosity index · CPC title