I. Introduction

A sand pump bailer is a wireline service tool used to clear debris which has settled on top of the subsurface equipment preventing recovery of the equipment by regular wireline operations. The sand pump bailer is a pump type tool which operates on the conventional lift pump and piston principle.

A double male adapter sub an extension bailer tube are available as optional extras in the event of large volume bailing operations

II. General Technical Parameters 

Note. More customized parts are available upon request

III. Structural features

The sand pump bailer is composed of upper contact, fishing neck, piston rod, barrel, connector (piece 5), lifting rod, piston, pipe shoe, cylindrical pin, steel ball, seal ring, set screw, etc. See the concrete structure in the figure.

When operating it, lift the upper contact and then the piston rod and piston connected with it will move upward. At this moment, the steel ball also will move upward and the rock waste in the well will be sucked up; when lowering the upper contact, the steel ball will fall in the hole of pipe shoe, and the rock waste sucked up will be blocked by the steel ball and kept in the barrel; suck and release it repeatedly until the barrel is filled up with rock waste, and then take out the tool.

The cylindrical pin plays a role of blocking the upward movement of steel ball.