Patent DE-102011000320-A1 (DE)
Title: Drilling rig for carrying out drilling in soil, comprises drilling frame, and drive unit slidably arranged on frame, where drive unit has rod cartridge for detachably connecting with drilling pipe, and drive motor standing with cartridge
Inventor: JENNE DIETMAR
IPC: E21B7/02
Filed: 2011-01-25
Abstract: The drilling rig comprises a drilling frame (14), and a drive unit (18) slidably arranged on the drilling frame, where the drive unit has: a rod cartridge (28) for detachably connecting with a drilling pipe; a drive motor (24, 25) that stands with the rod cartridge in a torque transmitted connection; a casing tube recording (32) coaxial to the rod cartridge for detachably connecting with a casing tube; and the drive motor and a coupling unit for the torque transmitted connection between the drive motor and the casing tube recording. The drilling rig comprises a drilling frame (14), and a drive unit (18) slidably arranged on the drilling frame, where the drive unit has: a rod cartridge (28) for detachably connecting with a drilling pipe; a drive motor (24, 25) that stands with the rod cartridge in a torque transmitted connection; a casing tube recording (32) coaxial to the rod cartridge for detachably connecting with a casing tube; and the drive motor and a coupling unit for the torque transmitted connection between the drive motor and the casing tube recording. The unit is provided to generate in direction of a longitudinal axis of the drilling pipes of an offset of an end of the drilling pipe lying opposite to the rod cartridge disposed to a drilling tool relative to an end of the casing tube lying opposite to the casing tube recording disposed to the drilling tool and/or to change the offset. The unit of the offset is generated by a relative movement of the casing tube recording and the rod cartridge in direction of the longitudinal axis of the drilling pipe. The unit is formed for generating the offset of the rod cartridge and the casing tube recording such that the offset is continuously adjustable. The unit for generating the offset is formed between the casing tube recording and the rod cartridge such that the offset is adjustable in discrete-sections. The drilling pipe is provided, and comprises linkage sections (30) connected to each other. The casing tube is provided, and comprises casing sections connected to each other. The unit for generating the offset comprises the linkage section and the casing section. The linkage section and the casing section have different length. The drilling tool is connected with the casing tube and the linkage. The casing sections have same length, where a first linkage section has the same length as well as the casing sections. A second linkage section has a shorter length as well as the casing sections and/or a third linkage section has a greater length as well as the casing sections. The linkage sections have the same length, where a first casing section has the same length as well as linkage sections. A second casing section has a shorter length as well as the linkage sections and/or a third casing section has a greater length as well as the linkage sections. The coupling unit comprises a carrier arranged to the rod cartridge, and a rotational stop for intervention arranged at the casing tube recording. The rod cartridge and the casing tube recording are coupled over the rod cartridge with the same drive motor and/or motors. A hole hammer as the drilling tool carries: a drilling head, whose outer diameter is smaller than an inner diameter of the casing tube; and an eccentric drilling head, whose small outer diameter is smaller than the inner diameter of the casing tube and whose large outer diameter is larger than the outer diameter of the casing tube. A transition piece is arranged between the drilling rod and the hole hammer, and is provided with radial centering webs. An axial length of the transition piece is selected so that the length of the drilling tool is connected with the drilling rod formed as the drilling head. The drilling tool is mounted at the casing tube. The casing tube recording comprises a cylindrical tube portion, which is connectable at its distal ends of the drive unit with the casing tube. The cylindrical tube portion is closed at its end facing towards the drive unit by a cover, which has a passage opening for the rod cartridge. The cylindrical tube portion has an outlet opening near its drive-side end for a drilling fluid, and is surrounded by an outlet ring surrounding an outlet opening, which is freely rotatable against the tube portion. The outer ring has a drain outlet for the drilling fluid. The passage opening is sealed in the cover opposite the rod cartridge by a seal. The seal is arranged and/or designed in such a way that it is rotated together with the drilling rod, and arranged in a seal receiver, which is rotated to an outlet ring.