Nipple capable of achieving infinite plugging while drilling

Abstract

The invention discloses a nipple capable of achieving infinite plugging while drilling, and belongs to the technical field of petroleum operation equipment. The nipple comprises a shell, wherein a bypass water nozzle is in threaded connection with the side wall of the shell, a mandrel is arranged in an inner cavity of the shell, the front end of the mandrel is arranged in a reversing piston core bar, the mandrel at the tail end of the reversing piston core bar is sleeved with a middle core bar, a spring, a spring pocket retainer ring and a locking nut in sequence, the tail part of the mandrelis sleeved with a balance piston and a connecting ring, and a central water nozzle is installed at an inner-hole straight port of the reversing piston core bar. The nipple capable of achieving infinite plugging while drilling is reasonable in structural design, convenient to use and operate, capable of effectively solving well leakage occurring in the drilling process, high in working efficiency,capable of saving manpower, financial resources and time, and capable of avoiding accidents of borehole wall sloughing, sticking of tools and blowout triggered by severe well leakage. Well leakage canbe immediately dealt with once well leakage is found without the trouble of pulling out of the hole, so that escalation of well leakage is avoided. Infinite plugging while drilling can be conducted,and BHAs and downhole instruments are effectively protected without affecting normal work.

Description

technical field [0001] The invention belongs to the technical field of petroleum operation equipment, in particular to an infinite circulation short joint. Background technique [0002] With the development of oil and gas exploration and development, the number of deep wells, complex wells and special craft wells is increasing year by year, and lost circulation is a very difficult problem in the drilling process, which often wastes a lot of manpower, financial resources and time. Serious lost circulation It will cause well wall collapse, pipe sticking and blowout accidents, and even a well will be scrapped, causing huge economic losses. Although people have proposed and applied many plugging technologies and methods, the problem of lost circulation in drilling has not been effectively solved so far. The main reason is that lost circulation has not been dealt with in time, so that lost circulation has become more serious and even out of control. With the development of dril...

AI Technical Summary

Problems solved by technology

With the development of drilling technology, downhole power tools and measurement-while-drilling instruments are widely used. The passage of plugging materials will cause the failure of these downhole tools or instruments. Therefore, it is necessary to trip out of the hole and replace the plugging BHA if the leakage is found, which not only reduces the operation efficiency , increase the operating cost, and also make the lost circulation fail to be dealt with immediately, and the lost circulation gradually expands, which seriously affects the stability of the well wall and the safety of well control

The traditional plugging joint can only switch and bypass once or several times, and the operation effect cannot be effectively improved

Images