Bumping and jarring tool

Details Bumping and jarring tool Bumping and jarring tool

1978-10-24

1980-10-28

Pate, III, William F.

Boring or penetrating the earth

Below-ground impact members

Fluid-operated

E21B 110

Patent

active

042301971

ABSTRACT:
A bumping and jarring tool for a well drill string is provided having a telescoping housing and mandrel with an annular hydraulic chamber therebetween divided into two portions. The lower portion is exposed to the ambient hydrostatic well pressure and the upper portion varies in volume as the tool opens and closes. When the tool is opened a jar is produced by a valve between the chamber portions which restricts hydraulic fluid flow between the chamber portions resulting in a pressure drop in the upper portion and by a pressure increasing element in the lower portion which increases the pressure therein while the pressure drops in the upper portion. When the valve permits unrestricted flow again, the sudden return to pressure equilibrium produces the jar stroke.

REFERENCES:
patent: 3087559 (1963-04-01), Hazen et al.
patent: 3562807 (1971-02-01), Slator et al.
patent: 3987858 (1976-10-01), Slator et al.
patent: 4098338 (1978-07-01), Perkins

Affiliated with

Also associated with

Rating

Bumping and jarring tool does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Bumping and jarring tool, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bumping and jarring tool will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-263872