METHOD FOR MEASURING LENGTH OF PIPE COLUMN LOWERED INTO WELL, AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2021 - IPC E21B47/04 

FIELD: oil production.

SUBSTANCE: inventions group relates to a method for measuring the length of a pipe string and a device for its implementation and can be used in the field of oil production to measure the length of a string of elongated bodies, in particular tubing, lowered into an oil well during technological operations therein. The method includes measuring the length of the string, counting the number of revolutions of the measuring roller frictionally connected with the winch rope, the start of measurements is made from the signal of the pressure sensor located on the pneumatic control line of the spider, and the signal about the rotation of the measuring roller, a sequence of signals is formed by which the direction of movement is determined the length and speed of the moving pipe string, the measurements are adjusted. The device contains a cable winch, on which a traveling block with an elevator is installed for gripping and lifting pipes connected into a column, a spider with wedge grips, a mast with a crown block, the function of a measuring roller is performed by a working crown block pulley, on the side surface of which signal sensors are mounted, interacting with sensitive elements located on the crown block frame, and a pressure sensor is installed on the pneumatic control line of the drilling rig spider.

EFFECT: invention provides the ability to calculate and analyze the speed of movement of the pipe string during running, with the reflection of the number of pipes in the string.

2 cl, 3 dwg