METHOD OF WHIPSTOCK ORIENTATION IN DRILLING STRING ASSEMBLY AND RUNNING, AND RELATED DEVICE FOR IMPLEMENTATION THEREOF Russian patent published in 2009 - IPC E21B47/22 E21B7/08 E21B19/00 

FIELD: oil and gas industry.

SUBSTANCE: group of inventions refers to directed and horizontal well-drilling. Method consists that laser beam is directed sideways the whipstock, while on measuring panel, laser incidence point is registered, and angular distance of incidence point and whipstock mark is measured. Laser beam is rotated around and in parallel to the axis of downhole inclinometering system body until angle on the measuring panel between laser incidence point and whipstock mark is equal to zero. Then internal surface of downhole inclinometering system body in its end face is marked so that it lays the same radius of external laser. Then locating fixture designed as rod with its one end resting on removed mark and its another end resting on its antipode is mounted inside of the body within its cross plane. After the first antipode is attached and assembly is run the length of the attached pipe, in the pipe two parallel beams are directed towards the locating fixture along the axis. Then beam plane is rotated until the locating fixture reaches the beam plane, the mark is remove to the internal surface of the first pipe in its face end by position of the beam, illuminating half of the locating fixture resting on the previous mark. The second locating fixture is mounted similarly. After the following pipe is attached, mark removing along the internal surface is performed again on the basis of the previous locating fixture until drilling string is considered to be assembled completely. The device for method implementation contains three laser sources, downhole inclinometering system, prograduated measuring panel perpendicularly to the axis of whipstock turbo-drill in the same plane of whipstock direction mark. Three lasers are mutually parallel in diametral plane of the drilling string on the platform rotating around the drilling string axis. Herewith two of them are symmetrised within the string relative to its axes with one being outside. The device is supplied with locating fixtures designed as rods providing that one rod end rests on the removed mark on the internal surface of pipe drill with its second end resting on the antipode. Furthermore to identify the mark, half of the locating fixture resting on the mark is painted with one bright luminescent colour with another half painted with the other colour. The platform accommodates optical system equipped with monitor and compass on the empty seat of the platform to evaluate whipstock angle when the locating fixture reaches within plane of internal laser beams, as well as internal temperature stabilisation system.

EFFECT: higher accuracy and reduced time to evaluate whipstock orientation in drilling string running.

2 cl, 5 dwg