Abstract: A method of producing a fluid from an earth formation is disclosed having a first fluid zone, a second fluid zone extending at a horizontal distance from the first fluid zone and a barrier zone located between said fluid zones. The fluid is produced through a production wellbore having a fluid inlet located in the first fluid zone. The method includes creating an inclined wellbore section being part of an auxiliary wellbore formed in the earth formation, the inclined wellbore section extending through the first fluid zone, the barrier zone and the second fluid zone so as to provide fluid communication between the fluid zones, closing the auxiliary wellbore at a selected location so as to prevent flow of fluid from the fluid zones through the auxiliary wellbore to the earth surface, and producing fluid flowing from the second fluid zone via the inclined wellbore section into the first fluid zone and through the production wellbore.

Abstract: Vibrations in borehole equipment are controlled by defining the energy flow through the equipment as the product of an "across" variable and a "through" variable, wherein fluctuations in one variable are measured and the energy flow is controlled by adjusting the other variable in response to the measured fluctuations in said one variable. Suitable variables for defining the energy flow are voltage times current of an electrical drive, pressure times flow rate of a hydraulic drive, or torque times angular velocity of any rotary drive.

Abstract: A jarring apparatus is provided for vibrating a pipe string in a borehole. The apparatus thereto generates at a downhole location longitudinal vibrations in the pipe string in response to flow of fluid through the interior of said string.