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:
Dec. 03, 1991
Filed:
Dec. 10, 1990
William T Taylor, Houma, LA (US);
Other;
Abstract
A mechanical down jar and method for its use in connection with coil tubing and with jointed tubing for releasing stuck objects within a well bore for installing coil tubing within deviated and horizontal well bores and for conducting other downhole servicing operations. The mechanical down jar mechanism incorporates a tubular body of significant mass having fixed anvils and telescoping mandrels at each end. The lower mandrel is adapted for connection to the stuck object. An internal load spring is released upon application of predetermined downward force to the housing by a firing lug and firing ring release mechanism having an adjustable release force. When released the housing with its lower anvil is rapidly moved downwardly by the force of the load spring and an accelerator spring impacts with signficant force against the force transmitting sub of the lower mandrel thus transmitting downwardly directed shock force to the stuck object or to tubing to be moved downwardly. By simple linear reciprocating movement of the jar operating tubing one or more down jars may be repeatedly recooked and fired as many times as is desired to move the object downwardly to the desired location within the well bore.