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Electromagnetic Extended Reach Tool For Servicing Long LateralWells

IP.com Disclosure Number: IPCOM000250476D
Publication Date: 2017-Jul-24
Document File: 3 page(s) / 43K

Publishing Venue

The IP.com Prior Art Database

Abstract

Use of an electromagnet which has a spring loaded mandrel passing thru the center, where a controller will allow current to flow, energizing the magnet which will cycle the mandrel upwards opening a valve allowing passage of fluid, then shut off allowing the spring to move the mandrel in the opposite direction, closing the valve. This cycling of fluid will create the vibratory motion of the tool allowing it to reduce friction between the drill string and well casing inside diameter (ID) allowing for easier movement of the drill string down into the casing. The controller and power supply for the device are enclosed either in the tool itself or a separate battery sub.

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Electromagnetic Extended Reach Tool For Servicing Long Lateral Wells

Use of an electromagnet which has a spring loaded mandrel passing thru the center,

where a controller will allow current to flow, energizing the magnet which will cycle the mandrel

upwards opening a valve allowing passage of fluid, then shut off allowing the spring to move the

mandrel in the opposite direction, closing the valve. This cycling of fluid will create the

vibratory motion of the tool allowing it to reduce friction between the drill string and well casing

inside diameter (ID) allowing for easier movement of the drill string down into the casing. The

controller and power supply for the device are enclosed either in the tool itself or a separate

battery sub.

Some drill strings, when operated with coiled tubing applications, become "stuck"

downhole in long wells, especially in laterals, due to friction between the drill string and/or

Bottom Hole Assembly (BHA) and the casing ID due to non-rotation of the string. This tool will

incorporate an electromagnet with a hollow core, through which passes a mandrel or shaft, the

end of which has a conical shape to it. This conical end of the mandrel will fit into a mating part

in the tool which acts as a valve, not unlike a large needle and seat type of valve. This mandrel

will be pressed downwards closing this valve with a compression spring. When the

electromagnet is energized, the mandrel will be pulled back against the spring thus opening the

valve allowing fluid to flow through it. The power is then disengaged from the electromagnet

and the spring rapidly closes the valve, causing a vibratory or hammer effect, allowing the tool to

loosen the friction between the BHA and casing ID and move further down the well. The power

to operate the electromagnet can be supplied by a lithium battery in the tool or in a "power sub"

mounted immediately above the tool itself. This sub would have passageways for the fluid to

pass around the battery. Also in this sub would be a controller, which would control the

frequency that the power was supplied to and removed from the electromagnet. This would allow

the rate at which the tool vibrates to be changed, and this would be set either on the surface or

while downhole via some means of communication wit...