Development of anti-bit balling fluids
AssigneeSaudi Arabian Oil Company
InventorsAbdullah Al-Yami, Abdulaziz A. Ba Hamdan, Saleh A. Haidary, Vikrant Wagle, Hussain AlBahrani, Ali Safran, Nasser AlHareth, Abdulla H. Awadh
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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.
Claims7
A method for using a drilling fluid in drilling operations, the method comprising:
- mixing:
- water,
- from 50 to 700 lb/bbl of a clay-based component based on total weight of the drilling fluid, and
- a polyethylene glycol comprising Formula (II):
- where n is an integer from 1 to 50, and
- optionally, including 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, starches, xanthan gum polymers, and combinations thereof,
- to produce the drilling fluid,
- wherein the drilling fluid consists of the water, the clay-based component, and the polyethylene glycol, and optionally, the at least one or more additives,
- wherein the drilling fluid has an accretion percentage of less than or equal to 18%, and
- introducing the drilling fluid to a subterranean formation.
Dependencies are inferred from the claim text.