An oilfield worker walks next to pipelines at PDVSA’s Jose Antonio Anzoategui industrial complex in the state of Anzoategui, Venezuela, April 15, 2015. REUTERS/Carlos Garcia Rawlins/File Photo PDVSA’s new senior executive line-up includes a Venezuelan navy rear-admiral, Hugo Chavez’s former Twitter manager and a leader of the late leftist president’s failed 1992 coup. The selections, announced as part of a sweeping executive shakeup of Venezuela’s struggling state oil company on Sunday, suggest former President Chavez’s unpopular successor Nicolas Maduro is strengthening his grip on the enterprise that powers the OPEC country’s economy. Maduro said the overhaul was aimed at stamping out corruption at the company that oversees the world’s biggest oil reserves and has been linked to major bribery cases in the United States. PDVSA [PDVSA.UL] President Eulogio Del Pino, a Stanford-educated engineer, was kept on, but most of his top executives, several with long oil careers, were removed. […]