E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
255/29
E21B 4/00 (2006.01) E21B 31/107 (2006.01) E21B 31/113 (2006.01)
Patent
CA 1056365
Abstract of the Invention A well jar has telescoping inner and outer elements having a torque transmitting connection therebetween. An intermediate member is rotatably mounted relative to the telescoping elements and is affixed in a longitudinal direction to one of the teles- coping elements. A releasable latch is connected between the intermediate member and one of the telescoping elements. The intermediate member is rotatable relative to the telescoping elements upon a predetermined minimum longitudinal force applied between the telescoping elements. The rotation causes a release of the latch and movement of the telescoping elements to an impact of coacting impact faces on the telescoping elements. An improve- ment involves a time delay section connected between the intermed- iate member and at least one of the telescoping elements for restraining such relative rotation for a preselected time interval of application of at least such minimum longitudinal force. In addition the preferred embodiment has the time delay section and the latch located in a common chamber, and the time delay section includes a hydraulic time delay device that makes use of the same fluid as that used for lubricating the latch. A method is disclosed for filling the common chamber and a method is dis- closed for forming a well jar having such a fluid chamber.
269709
Perkin Gregg S.
Robinson Glen
Thometz Theodore G.
LandOfFree
Well jar having a time delay section does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Well jar having a time delay section, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Well jar having a time delay section will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-504572