Pumping unit for oil drilling, with a movement control mechanism and a mobile body within a rotating head

2- “PUMPING UNIT FOR OIL DRILLING” wherein the fixed body (10) is fitted with a peripheral support for fixing the steel cables (11) which are coupled to the head (110) of the pumping unit (100), where guides (12) are attached to the fixed body (10) periphery, where the peripheral support is displaced, a position sensor (121) being provided on the top end of said guide (12);

3- “PUMPING UNIT FOR OIL DRILLING” wherein the telescopic mobile body (13) on the inner position of the fixed body has its course defined according to the movement of the pumping unit (PU) head (11), moving in the same proportion as the movement of such head (110), such mobile body (13) with movement driven by an electrical-hydraulic unit (20), so that, when the pumping course is shifted, an electronic system detects the new position that the mobile body (13) should reach (13) so as to set-off the movement, and drives the electrical-hydraulic unit (20) which commands movement of the mobile body (13) so that it causes displacement thereof until it reaches the desired position as identified by the position sensor (121).

4- “PUMPING UNIT FOR OIL DRILLING” wherein the stem top (120) stays on the same point even when the head (110) descends due to a shifting of the course, with the automatic halter adjustment mechanism altering the length of the stem (120), so that the stem top (120) is always in the same position.

5- “MOVEMENT CONTROL MECHANISM OF A MOBILE BODY WITHIN A ROTATING HEAD” comprising an equipment composed of a fixed portion (31) and a mobile portion (36), with the fixed portion (31) being composed of a reducer set (32), with a differential gear box (33) and its engine (40) and a control system (38), and the mobile portion (36) being composed of a rotating head (35) on which a mobile body is placed (39), a worm gear (37), a master gear (34), transfer gears (41), (42) and (43), and a movement system (44);

6- “MOVEMENT CONTROL MECHANISM OF A MOBILE BODY WITHIN A ROTATING HEAD” according to claim 5, wherein the reducer (32) rotates the mobile portion (36) entirely on the axle (45), the gear (34) being fixed on the axle (45) and rotating together driving the differential (33) through the transfer gear (42), with the differential (33) transferring the rotation to the gear (41) which rotates in the same direction as the gear (42);

7- “MOVEMENT CONTROL MECHANISM OF A MOBILE BODY WITHIN A ROTATING HEAD” according to claim 5, wherein the worm gear (37) is not fixed to the axle (45), but transfers the traction to the transfer gear (43) which, through the movement system (44) moves the mobile body (39), where, when the differential (33) engine (40) is turned off the master gear (34) and the worm gear (37) rotate at the same rate and in the same direction, and thus the gear (43) and the system (44) are not driven, and the mobile body (39) does not move on the rotating head (35);

8- “MOVEMENT CONTROL MECHANISM OF A MOBILE BODY WITHIN A ROTATING HEAD” according to claim 5, wherein when the differential (33) engine (40) is not turned on, the mobile body (39) will not be displaced along the rotating head (35), with the mobile portion (36) either rotating or still;

• when the engine (40) is turned on, the gear (41) rotates at a different rate (42) causing the worm gear (37) to rotate at a different rate than the master gear (34), so that such rate difference moves the gear (43) which through the movement system (44) displaces the mobile body (39) along the rotating head (35). By inverting the direction of the engine (40) rotation the mobile body (39) will be displaced towards the opposite direction, so that such displacement takes place both when the mobile portion (36) is rotating and when it is still.

9- “MOVEMENT CONTROL MECHANISM OF A MOBILE BODY WITHIN A ROTATING HEAD” according to claim 5, wherein the differential gear box (33) transfers the rotation of its engine (40) completely if the mobile portion (36) is still, however, if the mobile portion (36) is rotating driven by the reducer (32), the differential (33) sets-off the rotation of its engine (40) adding to or subtracting from the rotation of the mobile portion (36) so that the displacement of the mobile body (39) always takes place at the same rate, so that the differential (33) sets-off the rotation, receiving the rotation of the gear (42) that is being moved by the master gear (34).

10- “MOVEMENT CONTROL MECHANISM OF A MOBILE BODY WITHIN A ROTATING HEAD” according to claim 5, wherein the control system (38) for recording the relative position of the mobile body (39) reports to the engine (40), when it is time to stop and the necessary rotation direction for achieving another desired position.