TORQUE TRANSMISSION SYSTEM FOR HELICAL DRILLING TOOLS

Abstract: The application refers to equipment for soil engineering, to a system that makes easy the procedures of soil drilling by helical tools, increasing the performance of the machines, speeding up its operation and improving its performance, being based on the introduction of notches (2) in the blades of the helix (3), disposed to 120th degrees one of the other ones and aligned along the helix (3) for insert in cotters (4), diametrically disposed in a central axis (5) inside the rotator (6) through gearing (7, 8), powered by electric or hydraulic motor; being still, the notches (2) are aligned consisting on one, two or more rows, as it is necessary to resist to the torque of the rotator.

Description: Patent Descriptive Report of the I nvention "TORQUE TRANSMISSION SYSTEM FOR HELICAL DRILLING TOOLS" . The present patent refers to an equipment for soil engineering , to a system that facilitates the procedures of soil drilling by helical tools, increasing the performance of the machines, speeding up its operation and improving its performance. It is known that in the conventional system for soil d rilling by helical tools, a tool of helical perforation , also simply denominated helix, is rotated and , for its own weight or for the action of an axial force of the machine it penetrates the soil . I n that system, the tool is put in action by a rotator or the like, a reducer or a gearbox of rotary reduction . Because the helical form with segments in steps, like a thread , as the helix rotates, it is pulled inside the soil . The rotation determines a component of axial down force that at the same time the soil is drilled , the helix penetrates it, as a corkscrew. Some of the d rilled soil is taken upward . When reaching the wanted depth , the helix is removed by the action of an axial force of extraction . If the soil material is very resistant, it is necessary an extra force to push the helix from the inner soil . I n this case the force is applied on its head and consequently redirected to the helix by the joining . The known drilling equipments transmit the power (rotation) to the perforation helix through a joining that connects the rotator to the top of the helix. The rotator goes with the helix as it penetrates the soil , guided by the tower. The rotator, in this case, should be mobile along the tower and pulled by a crab and a cable. I n the present torque transmission system for helical d rilling tools, notches were introduced in the helix segments by cotters , aligned and constituting one, two or more rows, according to the resistance needs of the rotator torque. Thus the equipment rotates the helix by those notches. I n this case the rotator contains a central axis with enough internal d iameter to allow the passage of the helix. The cotters fit inside the notches of the helix to transmit the torque, rotating the helix. I n a similar way of the conventional system, when being rotated , the helix is pulled inside the soil slid ing inside the upper head , touching the cotters. The moving cables and pulleys of the helix have a twist-off device. The rotator is fixed in the base wall of the tower and may also be fixed in any point of the tower, accord ing to the convenience of the project and it may also move along all the tower or not. I n hard soils, that needs extra strength , on the helix for better penetration , the energy can be applied on the twist-off device in the top of the helix, or on the rotator, whose cotters are in touch with the helix. With that the system allows the placement of the rotator in any position giving several advantages, depending on the applications, demands, etc. , such as, for example, in the placement of the fixed rotator in the lower part of the tower. While in the conventional system, in the example described above, the rotator is positioned above the helix, elevating the center of gravity of the group, for being weighed , and generating great instability and imposing that the perforation device is wide and weighed for it had compensated instability caused by the rotator. The figure 1 is an elevation view of a drilling device, with the present system built. The figure 2 is a detail in perspective of the hel ical tool (helix) with the new system. The figure 3 is a view in longitudinal section of the rotator. The figure 4 is a section of a segment of the central axis with the helix in court. According with these figures and its numeric references, the present system of torque transmission for helical d rilling tools is based on the introduction of notches (2) in the blades of the helix (3), disposed to 120 th degrees one of the other ones and aligned along the helix (3) to be inserted in the cotters (4), diametrically disposed in a central axis (5) inside the rotator (6). The central axis (5) rotates inside the rotator (6) through gearing (7 and 8), powered by electric or hyd raulic motor. This way the rotator (6) can be in the lower part of the tower (9) while the helix (3) rotates and moves forward down to perforate the soil sustained by cables (10) and pulley (1 1 ), placed in the upper part of the tower (9) with a twist-off device. The notches (2) are aligned and consist of one, two or more rows, as it is necessary to resist to the torque of the rotator. The drilling device ( 1 ) rotates the helix through the notches (2) going by the cotters (4); the central axis (5) has enough internal d iameter to allow the passage of the helix (3). The rotator (6) for being settled can be in any position in the tower (9) and serves any project convenience, also to move along it. The present invention make easy the work of soil drilling by helical tools of perforation , increasing the capacity of the machines that use it, speeding up its operation , moreover reducing the costs of production of these machines. Its use facilitates larger revenue and efficiency in the most several perforations, such as: in the execution of dug stakes and moulded in site, in the execution of anchored retaining cables for contention; in the execution of wells for watching the underwater level ; in the soil extraction for surveys and sampling ; in the execution of wells to get water; in the drain execution for lowering of underwater level; in the installation of geophysical and seismic instruments; in the installation of explosive and etc.

Claims: C L A I M S 1 "TORQUE TRANSMISSION SYSTEM FOR HELICAL DRILLING TOOLS" , a system that make easy the procedures of soil drilling by helical tools, increasing the performance of the machines, speeding up its operation and improving its performance, characterized by being based on the introduction of notches (2) in the blades of the helix (3), disposed to 120 th degrees one of the other ones and aligned along the helix (3) for insert in cotters (4), diametrically disposed in a central axis (5) inside the rotator (6); being central axis (5) rotates inside the rotator (6) through gearing (7 and 8), powered by electric or hyd raulic motor; being still, the notches (2) are aligned consisting of one, two or more rows. 2. "TORQUE TRANSMISSION SYSTEM FOR HELICAL DRILLING TOOLS", according to claim 1 , characterized by the rotator (6) can be in the lower part of the tower (9) while the helix (3) rotates and moves forward down to perforate the soil sustained by cables ( 10) and pulley (1 1 ), placed in the upper part of the tower (9) with a twist-off device; the d rilling device (1 ) rotates the helix through the notches (2) going by the cotters (4); the central axis (5) has enough internal diameter to allow the passage of the helix (3). 3. "TORQU E TRANSMISSION SYSTEM FOR HELICAL DRILLING TOOLS", according to claim 1 , characterized by to be the rotator (6) for being settled can be in any position in the tower (9) and serves any project convenience, also to move along it; in hard soils, that need power on the helix (3) for better penetration , allowing an application of an extra force, that can be applied on the twist-off in the top of the helix (3), or on the rotator (6), whose cotters (4) touch the helix (3).

Inventors: FELICIANO DE SOUZA MARCO ANTON, TEIXEIRA CLO DALVIO EMILIO, TEIXEIRA CLO MARCOS EUGENIO, FELICIANO DE SOUZA, MARCO, ANTONIO, TEIXEIRA CLO, DALVIO, EMILIO, TEIXEIRA CLO, MARCOS, EUGENIO
Applicants: FELICIANO DE SOUZA MARCO ANTON, TEIXEIRA CLO DALVIO EMILIO, TEIXEIRA CLO MARCOS EUGENIO, FELICIANO DE SOUZA, MARCO, ANTONIO, TEIXEIRA CLO, DALVIO, EMILIO, TEIXEIRA CLO, MARCOS, EUGENIO
Application year: 2000
Main classification: F16H
IPC codes: E21B3, E21B7, E21B17