The invention discloses an
oil field underground
pipe column anti-falling device, and relates to the technical field of anti-falling tools, the
oil field underground
pipe column anti-falling device comprises an
upper joint, and a self-lubricating
assembly used for guaranteeing the smooth rolling effect of a centralizing ball is arranged in a counterweight steel block and a lower joint. According to the
oil field underground
pipe column anti-falling device, a
weightlessness sensor on an outer cylinder is in linkage with an
electromagnetic valve to be opened, lubricating oil in a liquid cavity in a balance weight steel block is guided into a telescopic
liquid storage pipe, the
self weight of the balance weight steel block is effectively reduced, the elastic
potential energy of a balance weight spring is increased in a disguised mode, and the upward pushing force of the balance weight steel block is enhanced; through switching of the adjustable power pump between low power and medium power, the stirring piece sealing plate in the liquid passing channel is driven to stir in a reciprocating mode, the flowing speed of lubricating oil is increased on the premise that a main injection opening of an
oil distribution branch is not closed, the lubricating operation on the centralizing ball is efficiently completed, the
friction force between the centralizing ball and a counter weight steel block caulking groove is remarkably reduced, and the service life of the centralizing ball is prolonged. And the blockage of the counterweight steel block in the ascending process is avoided.