locking spring
2.The connector is made up of upper joint, slotted steel ball, O-ring, locking pin, slotted sliding sleeve, coupling sleeve, setting ball, setting sliding sleeve, adjusting spring and lower joint The string combined with dual-stage and high efficiency connector + differential packer not only can be used to guarantee the full setting of the packer, also can be connected under low pressure ranged from 1.5-3.0 MPa, and better effect is obtained in field application.
