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EP-4739878-A1 - APPARATUS FOR SUPPLYING DRILL PIPES TO AND REMOVING THEM FROM A DRILLING DEVICE

EP4739878A1EP 4739878 A1EP4739878 A1EP 4739878A1EP-4739878-A1

Abstract

An apparatus for supplying drill pipe to and removing them from a drilling device, comprising an energy recovery system (40) which has a support cylinder (34) fluidically connected to a storage vessel (38, 61), wherein the support cylinder (34) and the storage vessel (38, 61) form a self-contained system.

Inventors

  • Binder, Jürgen
  • AYALASOMAYAJULA, Sai Kishore
  • FELD, Daniel Josef

Assignees

  • Herrenknecht Vertical GmbH
  • Hydac Technology GmbH

Dates

Publication Date
20260513
Application Date
20240704

Claims (16)

  1. 1 . Device for feeding and removing tubular bodies to a drilling device in a drilling rig, which has a base (11) on which a boom (12) is rotatably arranged so that the boom (12) can be pivoted about a pivot point (13), which has a receiving unit (25) which is designed such that a tubular body can be received at a receiving position and can be released at a delivery position, and which is arranged rotatably relative to the boom (12), and which has at least one lifting cylinder (31) which is rotatably arranged at one end on the base (11) and which is rotatably arranged at its other end on the boom (12), characterized in that at least one energy recovery system (40) is provided which has at least one support cylinder (34) which is connected to at least one first storage vessel (38, 61) in a fluid-conducting manner, that the at least one support cylinder (34) has at least one first space (39, 45) and at least one movable first active surface (47), that the at least one first space (39, 45) can be changed in its volume by a movement of the at least one first active surface (47), that the at least one first space (39, 45) is connected to the at least one first storage vessel (38, 61) in a fluid-conducting manner via at least one first line (37, 62), that the at least one first space (39, 45) in the support cylinder (34) is filled with a first fluid (42), that the first fluid (42) flows via the at least one line (37, 62) between the at least one first space (39, 45) and the at least one first storage vessel (38, 61) when the at least one first active surface (47) of the support cylinder (34) moves, and that the at least one support cylinder (34) and the at least one first storage vessel (38, 61) form a closed system.
  2. 2. Device according to claim 1, characterized in that the first fluid is a compressible gaseous medium.
  3. 3. Device according to claim 1, characterized in that the at least one first storage vessel (38, 61) is a hydraulic accumulator (38, 61), that the first fluid is a substantially incompressible liquid medium, that at least one second compressible fluid (43) is provided in the at least one first hydraulic accumulator (38, 61), and that a pressure of the second compressible fluid (43) changes depending on the flow of the first fluid (42) into or out of the at least one first hydraulic accumulator (38, 61).
  4. 4. Device according to claim 3, characterized in that the second compressible fluid (43) is a gaseous medium (43), preferably nitrogen.
  5. 5. Device according to one of claims 1 to 4, characterized in that the support cylinder (34) is connected to the boom (12) via a swivel joint (36).
  6. 6. Device according to claim 5, characterized in that the boom (12) has a receiving element (36a) in which the rotary joint (36) is provided displaceably.
  7. 7. Device according to claim 6, characterized in that the receiving element (36a) is an elongated hole (51).
  8. 8. Device according to one of claims 3 to 7, characterized in that the at least one support cylinder (34) is a hydraulic cylinder.
  9. 9. Device according to claim 8, characterized in that the hydraulic cylinder is a differential cylinder or a plunger cylinder.
  10. 10. Device according to claim 9, characterized in that the plunger cylinder has at least one first chamber (39, 45) and at least one second chamber (45, 39) which are connected in a fluid-conducting manner.
  11. 11. Device according to one of claims 1 to 10, characterized in that the support cylinder (34) has an extending and retracting component, for example a piston rod (44), and that the extending and retracting component is mechanically connected to a piston rod (46) of the at least one lifting cylinder (31).
  12. 12. Device according to one of claims 1 to 11, characterized in that the at least one support cylinder (34) has at least one second space (45, 39) and at least one second active surface (48) that can be moved therein, that the at least one second space (45, 39) is filled with a third fluid (42a), that the at least one second space (45, 39) can be changed in its volume by a movement of the at least one second active surface (48), that the at least one second space (45, 39) is connected to at least one second storage vessel (61, 38) via at least one second line (62, 37) in a fluid-conducting manner, and that the third fluid (42a) is conveyed via the at least one line (37) between the at least one second space (45, 39) and the at least one second storage vessel (61, 38) when the at least one second active surface (48) of the support cylinder moves. (34), and that the at least one support cylinder (34) and the at least one second storage vessel (61, 38) form a closed system.
  13. 13. Device according to claim 11 or 12, characterized in that the third fluid (42a) is the first fluid (42).
  14. 14. Device according to claim 13, characterized in that the third fluid (42a) is a compressible gaseous medium.
  15. 15. Device according to claim 14, characterized in that the at least one second storage vessel (38, 61) is a hydraulic accumulator (61, 38), that the third fluid (42a) is a substantially incompressible liquid medium, that at least one fourth compressible fluid (43a) is provided in the at least one second hydraulic accumulator (61, 38), and that a pressure of the fourth compressible fluid (43) changes depending on the flow of the third fluid (42) into or out of the at least one second hydraulic accumulator (38, 61).
  16. 16. Device according to claim 15, characterized in that the fourth compressible fluid (43) is a gaseous medium (43), preferably nitrogen.

Description

Device for feeding and removing drill rods to a drilling device The invention relates to a device for feeding and removing tubular bodies to a drilling device in a drilling rig, which device has a base on which a boom is rotatably arranged so that the boom can be pivoted about a pivot point, which device has a receiving unit which is designed such that a tubular body can be received at a receiving position and can be released at a delivery position, and which is rotatably arranged relative to the boom, and which has at least one lifting cylinder which is rotatably arranged at one end on the base and which is rotatably arranged at its other end on the boom. When drilling, particularly deep drilling, for example for the extraction of crude oil and natural gas or for the generation of energy from geothermal energy, a drilling tool is used that is driven by a drill string consisting of drill rods. During the drilling process, it is necessary to change the drilling tool, either because it is worn out or because the geological conditions have changed and a different type of tool is required. To change the drilling tool, the entire drill string must be removed from the borehole and, after a new drilling tool has been provided, reinstalled. To do this, the drill rods of the drill string are removed and installed two or three at a time, for example in large systems, and placed upright in the tower of the drilling rig. If this storage area in the tower is full, the drill rods that still need to be removed or installed must be removed from the drilling rig. During the drilling process itself, once a certain drilling progress has been achieved, additional drill rods must be added to the drill string; the same applies if a standing pipe storage area in the tower of the drilling rig is not possible/planned. These drill rods are fed in from outside. For this purpose, a pipe storage area is provided next to the drilling rig. This pipe storage area is connected to the drilling rig via an inclined plane, for example. The drill rods are transported into the drilling rig via this inclined plane using a lifting device, and are then fed to the drilling rig using the lifting device and installed. This process involves a lot of manual work and carries the risk of injury. Furthermore, the storage area for the drill rods outside the drilling rig means a large drilling area is required, which is not necessarily advantageous for certain applications. For such cases, so-called pipe handlers have been developed which pick up tubular bodies such as drill rods or casings horizontally in the pipe storage and lift them with a lifting/swivelling movement and rotate them by 90 degrees in order to arrange the tubular bodies vertically above the borehole or in the area of the borehole in the drilling rig and transfer them to the lifting mechanism of the drilling rig. The disadvantage of the known pipe handlers is that the energy required for lifting via the lifting cylinders in the pipe handler is lost during the return movement and has to be completely replenished. CN103277058A discloses a hydraulic, energy-saving conveyor for conveying drill pipes. This comprises a hydraulic drive system with a movable weight for energy storage and a transport mechanism. During the return of the transport mechanism, the weight is moved to an upper position. When lifting, the potential energy of the weight is fed back into the system. The drive system uses hydraulic energy to move the drill pipes. The transport mechanism comprises a special mechanism for gripping and moving the drill pipes. During the return of the transport mechanism, the weight is moved to an upper position. When lifting, the potential energy of the weight is fed back into the system. The system is mechanically complex and prone to maintenance. It is an object of the invention to provide a device for feeding and removing tubular bodies to a drilling device in a drilling rig, in which the energy consumption is reduced. The disclosure provides for this according to the invention that at least one energy recovery system is provided which has at least one support cylinder which is connected to at least one first storage vessel in a fluid-conducting manner, that the at least one support cylinder has at least one first space and at least one first active surface which can be moved therein, that the volume of the at least one first space can be changed by a movement of the at least one first active surface, that the at least one first space is connected to the at least one first storage vessel in a fluid-conducting manner via at least one first line, that the at least one first space in the support cylinder is filled with a first fluid, that the first fluid flows via the at least one line between the at least one first space and the at least one first storage vessel when the at least one first active surface of the support cylinder moves, and that the at least one support cylinder and the at leas