The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 01, 1986
Filed:
Sep. 12, 1984
Burchus Q Barrington, Duncan, OK (US);
Halliburton Company, Duncan, OK (US);
Abstract
A well tool apparatus includes a housing adapted to be connected in a pipe string. A mandrel is slidably received in the housing and adapted to be selectively telescoped between first and second positions relative to the housing to manipulate an operating assembly of the apparatus. The mandrel is spaced radially inward from the housing to define a longitudinally extending metering chamber in which is received a metering cartridge which divides the metering chamber into first and second chamber portions. The metering cartridge has a fluid passage disposed therethrough joining the first and second chamber portions and has a flow restricter disposed therein. A sliding seal is provided between the metering cartridge and the housing. A selective seal is provided between the metering cartridge and the mandrel for temporarily sealing therebetween when the mandrel slides in a first direction relative to the housing thus requiring any fluid flow between the portions of the metering chamber to be through the fluid passage of the cartridge. The selective seal allows fluid flow between the portions of the metering chamber to bypass the fluid passage of the metering cartridge when the mandrel slides in a second direction opposite the first direction relative to the housing.