TUBING TESTER Russian patent published in 2006 - IPC E21B34/06 

FIELD: mining, particularly valve arrangements for boreholes or wells.

SUBSTANCE: tester comprises testing valve having body. Valve body consists of two parts, namely upper and lower ones, fixer anchoring unit and sealing unit. Tester additionally comprises case for testing valve receiving installed at lower end of tubing interval to be pressure tested. Tubular shoe is arranged under the case. Tubular shoe has inner annular cavity limited in length and having dimension exceeding inner diameter of tubing to be pressure tested. Body parts are mutually spring-loaded. Upper part is movably installed relatively fixed body part and is provided with releasable spring-loaded rod. Rod may cooperate with upper ends of anchoring unit fixers. The anchoring unit is made as a pair of double-armed levers pivotally installed in lower fixed body part and mounted on common axis to cooperate with shoe. Sealing unit packer is arranged between fixed and upper movable body parts. Upper end of movable body part is provided with head for tester catcher receiving to remove the tester from well.

EFFECT: simplified structure and increased reliability.

5 dwg