20 © TechSci Research Research Methodology 20 Data triangulation techniques were applied to fill the gaps and to present a more meaningful picture of the market . To forecast the Global Directional Drilling Market, TechSci Research used various forecast techniques such as : o Moving Average o Time Series Analysis o Regression Analysis o Econometric and Judgmental Analysis TechSci Research used its own forecast tool, which is based on the growth of various allied industries in respective regions . TechSci Research also used the impact analysis during short, medium and long term period to estimate and analyze market demand scenario . Note : (a) : Sum of some shares may not be 100 % due to round off till two decimal places . (b) The market data for 2021 is actual only for 9 months (till Sep 2021 ), for rest 3 months (Oct 2021 - Dec 2021 ), the data is estimated . (c) The scope of the report is limited to Oil & Gas Directional Drilling only . Partial List of Companies Interviewed Halliburton Co . , Schlumberger Limited, Scientific Drilling International, Leam Drilling Systems, Inc . , NOV Inc . , Baker Hughes Holdings LLC, Weatherford International plc, and Jindal Drilling & Industries Limited, among others . Partial List of Secondary Sources Company Annual Reports, Press Releases, Industry Magazines, Industry Reports, Company Websites, TechSci Research Proprietary Database & Knowledge Repository, etc .