Add independent Nigerian drillers to the list of oil producers itching to supply more crude at a time when OPEC and allies like Russia are trying to restrict output and prop up prices. Domestic Nigerian producers are aiming to pump almost 250,000 barrels a day more crude by 2020 as part of a wider plan for the nation to lift output to 2.5 million a day, Oil Ministry data show. Shoreline Group, the third-biggest independent, wants to double output by December with Seplat Petroleum Development Co., the second-largest, also intending to produce more. (chart on original article) They are planning to add barrels at the same time as Nigeria participates in a global pact to restrict oil supply that’s being led by the Organization of Petroleum Exporting Countries and non-member nations including R...