Earth boring device for cable-guided drilling and method for drilling a drill string into the ground by means of an earth boring device for cable-guided drilling

Abstract

The invention relates to an earth drilling device for cable-guided drilling with a carriage and a carriage movable back and forth on the carriage for moving a drill string having rod sections along a drill string axis, wherein the earth drilling device has a clamp for the drill string on the carriage, and a cable movement device is provided for moving one end of the cable, by means of which the end of the cable can be moved in a direction along the longitudinal direction of the carriage, wherein the cable movement device is designed for a movement of the end of the cable away from the clamp.

Description

[0001] The invention relates to an earth drilling device for cable-guided drilling and a method for inserting a drill string into the ground using an earth drilling device for cable-guided drilling.

[0002] To precisely control an earth drilling operation, it is necessary to determine the position of one end of the drill string as accurately as possible, especially the drill head or a section of the drill string located near the drill head in the ground. Two main methods are available for this purpose.

[0003] The position of the drill head can be determined, for example, by a transmitter in or on the drill head using an electromagnetic field through the soil. This method is known as the walkover technique. The walkover technique allows for rapid location and is easy to use. Above the soil, the drill head can be located using a signal strength meter (receiver). The maximum signal strength of the transmitter signal in the drill head can be determined as a function of the receiver's position above the soil. The signal strength depends on the transmitter's depth in the soil, thus enabling depth determination. However, the margin of error increases with greater drilling depths.

[0004] For great depths, higher accuracy at shallower depths, and / or under obstructing or completely inaccessible obstacles, cable-guided drilling can be used to locate the end of the drill string in the ground (drill head and / or drill head area). In cable-guided drilling, data from a probe located at the end of the drill string in the ground (drill head or drill head area) is transmitted to the drilling rig via an electrical cable along the drill string. To create this cable path, each section of the drill string, particularly each section, can be fitted with an internal cable during the drilling process, which can be connected to cables of adjacent sections of the drill string, especially other drill sections.The data transmitted by the probe to the area of ​​the earth drilling device can be displayed to an operator to influence the direction of the earth drilling.

[0005] Cable-guided drilling is characterized in particular by the fact that during drilling, each section of drill string to be attached to the drill string already in the ground is equipped with a cable in order to form an electrical conduction path through the drill string section to the section of drill string already in the ground, which in turn may also have a cable.

[0006] Previously known methods for establishing a continuous cable connection to the probe through the drill string sections are complex and require, among other things, at least two operators at both ends of a drill string section being attached to the drill string, and / or an operator who has to walk back and forth between the two ends of the drill string to establish the connection. The procedures currently in place are designed to be time-consuming and costly.

[0007] The object of the present invention is therefore to provide an earth drilling device and a method with which the effort in terms of time and / or costs, in particular during the insertion of the drill string into the ground, can be reduced.

[0008] The problem is solved by the subject matter of the independent claims. Advantageous embodiments are the subject matter of the respective dependent claims and the following description.

[0009] The core concept of the invention is to execute a cable movement at one end of the cable using a device in order to achieve advanced automation. In particular, contrary to what one might expect, this involves a direction that initially contradicts the insertion of the cable into a drill string or borehole. Although the cable should ideally be inserted or pushed into the drill string, the invention takes the seemingly counterintuitive approach of guiding the cable away from a clamp for an already drilled borehole. This movement forms the basis of the invention. The invention, through this cable movement, has pioneered a new method of cable handling. Defined movement at different points during the process of moving the cable within the borehole or drill string, and in between, is only made possible by implementing the core concept of the invention.The invention takes effect precisely where the cable can be cut to initiate another drill string; the end of the cut cable can be handled from the point where the cable is cut. Where the operator must reconnect the end of the cable – after it has passed through the drill string being initiated – to the cable in the drilled section, at least partial automation of the cable movement, which can also include movement in the reverse direction, is possible.

[0010] The invention provides an earth drilling device for cable-guided drilling, comprising a carriage and a carriage movable back and forth on the carriage for moving a drill string with rod sections along a drill string axis. The earth drilling device has a clamp for the drill string on the carriage. A cable movement device is provided for moving one end of the cable. By means of the cable movement device, the end of the cable can be moved in one direction along the longitudinal direction of the carriage, the cable movement device being designed for movement away from the clamp.

[0011] This creates the possibility of handling the cable end in such a way that a controlled or defined movement away from the clamp is possible. In addition to moving the cable end away from the clamp, this controlled movement can also include, at a later point, a movement towards the clamp. The operator can remain in the clamping area to connect the cable end, which is later returned to the clamping area, to the end of the cable already present in the drilled section of the ground. This controlled movement of the cable end away from the clamp lays the foundation for potential automation, allowing the operator to remain in the clamping area, eliminating the need for at least one additional operator, and / or preventing the operator from constantly having to move back and forth between the ends of the drill string being installed.The actual movement of the cable end may be of less interest than knowing its position after moving it away from the clamp. This movement away from the clamp can be designed to move the cable end to a predetermined position, from which further handling, particularly automated handling, is possible, especially for inserting the cable end into a newly started drill string section. This movement away from the clamp can occur, in particular, outside the axis of the drill string. This creates increased added value for the company performing the drilling or the company providing the drilling equipment, as cable-guided drilling can be carried out with less financial expenditure and / or at a faster rate.

[0012] For the purposes of this description, the term "earth drilling device" encompasses a device that moves a drill string comprising drill sections within an existing or newly created channel in the ground in order to create or enlarge a borehole, in particular a horizontal borehole (HD), or to pull pipelines or other long objects into the ground. The earth drilling device may, in particular, be an HD device or an HDD device. An earth drilling device can thus be a device that drives a drill string, displacing soil and driving the drill string translationally into the ground in a substantially longitudinal direction. An additional rotational movement of the drill string about its longitudinal axis may be provided.

[0013] The term "rod section" as used in this description does not exclusively encompass rigid, individual force transmission elements that can be directly or indirectly connected to one another and that can be used in an earth drilling device. A rod section can be, in particular, rod-shaped and / or tubular. A rod section can have a connection point, especially at one end, and most preferably at both ends, by means of which two rod sections can be connected to one another. In particular, the connection point can be a screw thread, part of a plug connection, or another mechanical means of engagement.

[0014] The rod shot can also be a double-tube rod shot, in which there is an inner rod with an inner tube and an outer rod with an outer tube that surrounds the inner rod.

[0015] A drill string consisting of drill sections can be lengthened as drilling progresses (especially during pilot drilling) or shortened after drilling is complete (when withdrawing and removing the drill string from the ground). Lengthening is generally achieved by adding one drill section to the existing drill string already in the ground; the drill string, now extended by one section, is then driven further into the ground by that length. Similarly, the drill string can be shortened, also typically by one drill section. During shortening—the process of withdrawing the drill string from the ground after drilling—the drill string is pulled out of the ground by the length of one drill section, and this section is separated from the remaining section in the ground.

[0016] The drill string may have a drill head and, if present, a drill bit at one end, particularly at the front. The drill string may also have a front-mounted drilling tool.

[0017] The term "drill string axis" refers in particular to the axis formed by the longitudinal axes of the individual drill string sections. For the purposes of this description, the longitudinal axes of the drill string sections located in the immediate vicinity of the drilling rig are considered. Specifically, this includes the last drilled section or the section that will be drilled or connected to the drill string next. The drill string axis is, in particular, the axis with which the drive unit receives the new drill string section and can therefore correspond to the longitudinal axis of the new drill string section. The drill string axis can also coincide with the longitudinal axis of movement of the device that inserts the drill string section into the ground, in particular the carriage and / or the drill head.

[0018] The term "carriage" refers to a frame. Specifically, a carriage is mounted on the carriage and can move back and forth. The frame may be mobile. The carriage provides either straight or linear guidance for the carriage. It can also provide a (guide) plane along which the carriage can move. This (guide) plane can be the surface on which the carriage is guided. A carriage allows for the application of significant forces to the drill string.

[0019] The term "sled" refers to a component that can move back and forth relative to the drill string carriage. The carriage is a stationary part during the insertion of the drill string into the ground; the sled is the movable part relative to the carriage. A "drill shaft" can be attached to or mounted on the sled. The drill shaft can be designed to engage with or be connected to a drill string section at its end in order to exert a translational and / or rotational force on the drill string section. Typically, a drill string section to be connected to the drill string is engaged with the drill shaft. This section is then connected to the last drill string section of the already drilled string, thus moving the entire drill string with the attached drill string section through the ground.The sled typically has a base on / above which, for example, the drill shaft is arranged.

[0020] The term "clamping" refers to a device used to clamp the drill string driven into the ground, for example, to lengthen the clamped drill string by adding another drill section or to shorten it by one drill section. The clamping device is usually located at the end of the drill rig along its length and acts on the drill string to hold it in position, particularly when the drill shaft is no longer connected to the drill string for the purpose of adding or removing a drill section.

[0021] The term "cable movement device," as used in this description, encompasses a device by which the movement of a cable end, particularly along a trajectory, is possible. The term "trajectory" is used essentially synonymously with the terms path, route, or track. A substantially defined movement of the cable end can be enabled. The cable movement device may, in particular, include a receptacle for the cable end and a drive for moving the receptacle. The cable is not simply pulled away from the clamp, but rather guided and moved, so that a control unit, particularly for the drive(s) of the cable movement device, "knows" the location of the receptacle and thus the location of the cable end—when it is in the receptacle—and moves the cable end according to the control unit's instructions.The end of the cable, optionally attached to a receiver, can be moved along a trajectory, which can be sensibly selected, in particular as a straight path of movement. After returning to its original position, the end of the cable, optionally with the receiver attached, can be located at a predetermined position.

[0022] The cable movement device can be designed to be compact, so that it does not need to extend over a large area of ​​the carriage; in particular, elements for guiding the cable along the longitudinal direction of the carriage can be omitted. It is not necessary to provide cable guide elements arranged on the carriage. In a further embodiment of the invention, simple and quick, at least partially automated, handling of the cable end is possible based on the fundamental concept of the invention. The compact design of the cable movement device can be improved or supported by allowing the cable movement device, together with the carriage, to be moved in at least one direction, particularly away from the clamping point.

[0023] The term "end of cable" refers, as described above, to the terminal portion of a cable. This terminal portion, or the end of the cable, can occur when the cable is cut, particularly at the end of the drilled section or in the clamping area, especially when the drill string has been lowered into the ground and another section of the drill string needs to be attached. The end of the cable is specifically the portion of the cable that is not part of the already drilled section and may be part of a supply, particularly on a cable reel.

[0024] The term "cable" as used in this description encompasses a single- or multi-core bundle of conductors sheathed in an insulating material, primarily used for the transmission of energy and / or information. Electrical signals can be transmitted via a cable. If the cable has multiple conductors, parallel or simultaneous transmission of several signals is possible. Cables can be connected by stripping one end of a cable to another stripped end, clamping the cables together, or otherwise mechanically and / or materially bonding them. To protect the connection, the joint can be insulated, particularly with heat-shrink tubing. When a cable is described as such, the drill string used to create an electrical connection using a cable is a series of interconnected conductors.The connection of individual cable segments is shown, all of which are essentially the length of a rod section.

[0025] The term "longitudinal direction of the carriage" refers to a directional or geometric characteristic describing the movement of the cable end. The longitudinal direction of the carriage can coincide with or run parallel to the direction of movement of the carriage. The longitudinal direction of the carriage can also correspond to the direction of advance of the drill string or borehole being drilled, particularly in the area of ​​the earth drilling rig.

[0026] The term "longitudinal" in the sense of a description encompasses an essentially parallel course between two mentioned directions.Deviations from parallelism are also possible, provided that an angle enclosed with the reference direction is in the range of approximately 0° to approximately 45°, preferably between approximately 0° and approximately 40°, more preferably between approximately 0° and approximately 35°, more preferably between approximately 0° and approximately 30°, more preferably between approximately 0° and approximately 25°, more preferably between approximately 0° and approximately 20°, more preferably between approximately 0° and approximately 15°, more preferably between approximately 0° and approximately 10°, particularly preferably between approximately 0° and approximately 8°, particularly preferably between approximately 0° and approximately 6°, particularly preferably between approximately 0° and approximately 5°, particularly preferably between approximately 0° and approximately 4°, particularly preferably between approximately 0° and approximately 3°, most preferably between approximately 0° and approximately 2°, and most preferably between approximately 0° and approximately 1°.Deviations from strict parallelism can result from manufacturing tolerances and a certain flexibility that deliberately allows for deviations.

[0027] The term "away from the clamp" encompasses, for the purposes of this description, a movement directed away from the drilled drill string, in which, in particular, the end of the cable, which will preferably be guided through the drill string section to be attached, can be moved to the rear area of ​​the drill string section to be attached. The term "away from the clamp" can also encompass, for the purposes of this description, a movement that is essentially translational along the drill carriage.

[0028] In a preferred embodiment, the cable movement device is also movable to move the end of the cable in a direction along the longitudinal axis of the carriage, which is a movement in the direction of the clamping. This allows for a higher degree of flexibility, as the movement of the cable end can be achieved for different operations and purposes. Movement of the cable, and in particular of the cable end, is possible in both directions along the longitudinal axis of the carriage.

[0029] In a preferred embodiment, the cable movement device has a receptacle for the end of the cable, which provides a simple, and in particular easily detachable, way to attach or fix the end of the cable to the cable movement device.

[0030] The term "receiver" as used in this description encompasses a component or element with a bore, recess, opening, hole, depression, groove, or the like, into which the end of the cable can be inserted to connect it to the cable movement device. The bore may be designed to completely penetrate the component or element (through hole) or not completely penetrate it (blind hole). In particular, the term "bore" as used in this description refers primarily not to the method of manufacture, but simply to the provision of the recess, opening, hole, depression, or groove.

[0031] The receptacle may have one or more fixing means in the form of one or more screws, one or more pins, and the like, to secure the end of the cable to the receptacle. The receptacle may have one or more internal threads adapted to the screw(s) and / or one or more through holes adapted to the outer diameter of the screw, with one or more nuts being provided to fasten the screw(s). The receptacle may have one or more locating holes for the pin(s) to secure the pin(s).

[0032] The design of the cable holder may take into account the conditions on the construction site. The cable fixing in or on the holder may be designed to simplify handling; for example, the use of tool-requiring fixing devices may be reduced or eliminated entirely.

[0033] It may be possible to fix the cable to or in the receptacle essentially without tools, by simply inserting or pressing the cable into the receptacle. The receptacle can be designed to guide the cable through one or more holes in it. A looped, coiled, or arc-shaped arrangement is possible, in which the cable is at least partially routed back into or along the receptacle ("the cable is present twice in cross-section in a certain area of ​​the receptacle"). A looped, coiled, or arc-shaped routing or arrangement can redirect and reduce any potential tensile force on the cable.

[0034] It is possible for the cable to be guided in or within the receptacle by a guide, which may be groove-shaped. The guide, which may be groove-shaped, can have a loop-shaped, coiled, or arc-shaped profile. It can be advantageous to avoid any overhang of the cable at the receptacle, so that the outer diameter of the receptacle can be kept as small as possible, for example, to allow the cable to be inserted and / or guided into or through a cavity with a small inner diameter.

[0035] The receptacle may be provided with a groove-shaped guide for the cable on its outer surface, into which the cable can be inserted. In a preferred embodiment, at least one barbed arrangement may be provided in the groove-shaped guide, which reduces or prevents movement of the cable out of the guide. Removal of the cable from a guide, particularly one with a barbed arrangement, can be achieved by lifting the cable out of the guide without exerting significant tension on the cable in the direction of action of the barbed arrangement.

[0036] In a guide, particularly a groove-shaped one, for the end of the cable in or on the receptacle, several barbed arrangements can be present which can act in different directions (tension or pressure).

[0037] In a preferred embodiment, the cable movement device comprises one or more drives, which can be controlled by a controller. The drive(s) can also be referred to as motors, and optionally one or more gearboxes may also be present. The drive(s) can be configured as a rotary drive and / or a linear drive.

[0038] The term "control system" as used in this description encompasses an electrical and / or electronic device that can directionally influence the behavior of the cable movement device. In this sense, the term "control system" can refer to a physically present device. However, in the context of its use in this description, it can also refer to the process of controlling the device, particularly by means of a sequence of commands executed by the electrical and / or electronic device. This can achieve at least partially automated movement of the cable end. The control system for the cable movement device can also be configured to control the operations of the earth drilling device. For example, the control system for the earth drilling device can be supplemented by the control system for the cable movement device.Alternatively or additionally, a separate control unit for the cable movement device can be provided for the earth drilling device, with an interface between the two control units optionally available. The control unit(s) can be configured to execute a sequence of commands, particularly within the framework of a program or application. The program can optionally be stored in memory, particularly non-volatile memory. This allows for a high degree of flexibility. Access to the sequence of commands, or to any changes to the sequence of commands, particularly in the form of a program or application, can be restricted to authorized operators only.

[0039] An embodiment in which the control system for the earth drilling device also controls the cable movement device is particularly preferred, since the control of the cable movement device can occur, if necessary, after and during processes effected by the control system of the earth drilling device, for example, moving the drill string section to be inserted into the area of ​​the drill string axis. Thus, the process of controlling the cable movement device and its components can be integrated into the control system of the earth drilling device.

[0040] The drive(s) of the cable movement device enable a high degree of flexibility in handling the cable. It can be provided that the cable, in particular the cable end, can be moved together with the cable movement device or the part of the cable movement device that receives the cable end, by moving the cable movement device or the corresponding part of the cable movement device that receives the cable end in space. The cable end can remain stationary relative to the cable movement device or the corresponding part of the cable movement device. In addition to moving the cable end while the cable movement device itself moves, the drive(s) also allow for an additional movement imprinted on the cable end without moving the cable movement device itself in space.

[0041] It may be provided that one of the drives is designed to impose a movement on the receiver at the end of the cable. In a simplified embodiment, the drive may be configured to impose a substantially linear direction of movement. It may also be provided that the drive for moving the receiver can exert a force essentially only along one axis, whereby the drive may be configured to impose a movement along both directions of the axis.

[0042] The receptacle, particularly when mounted on a shear-resistant element, preferably at its end face, can be moved directly or indirectly by the action of two opposing rollers, between which the shear-resistant element is arranged and one of which is driven. Alternatively or additionally, it is possible to use two chains, between which the shear-resistant element is arranged and one of which is driven, to move the shear-resistant element. A person skilled in the art, with knowledge of the invention, can choose any configuration for how the receptacle and / or the shear-resistant element can be moved. For example, it may be possible to move the receptacle and / or the shear-resistant element alternatively or additionally by means of a "cyclic imprinting" of a movement by a linear motor.

[0043] A drive mechanism for moving the receiver can include a device for determining the length of the receiver's movement. This allows the system to determine, for example, how far the receiver has been pushed forward. The length of the movement can be adapted to the length of the rod section into which the receiver or the end of the cable is to be inserted. Automation of the process is possible.

[0044] It may be provided that one or more drives are available for aligning the fixture. It may be preferred that the entire cable movement device is moved by means of the drive or drives for aligning the fixture. Alternatively or additionally, it may be provided that the drive or drives for aligning the fixture are used to move the drive for moving the fixture relative to the cable movement device.

[0045] In a preferred embodiment, the cable movement device is translationally movable relative to the carriage and / or pivotable relative to the carriage. This allows for a high degree of flexibility. While handling the entire cable movement device initially seems counterintuitive to a simpler design of the device, it offers advantages in cable handling.

[0046] It may be provided that the translational movement relative to the carriage also includes a translational movement relative to the carriage. It may be provided that the pivoting of the cable movement device relative to the carriage also includes a pivoting relative to the carriage.

[0047] The translational movement and / or pivoting of the cable movement device can be used, in particular, to align the receptacle with a connecting rod section to be attached. A drive can be provided that moves the receptacle relative to the carriage and / or the carriage in order to shift the receptacle along its longitudinal axis relative to the longitudinal axis of the carriage while maintaining a substantially equal angle between the longitudinal axis of the receptacle and the longitudinal axis of the carriage (translational movement). A drive can also be provided that pivots the receptacle relative to the carriage and / or the carriage, thereby changing the angle between the longitudinal axis of the receptacle and the longitudinal axis of the carriage.

[0048] If the movement of the cable movement device is described, it may be a movement of the receptacle together with a drive designed for the movement of the receptacle, so that the movement of the cable movement device also results in a movement of the receptacle, without moving the receptacle as such relative to the cable movement device.

[0049] In a preferred embodiment, the cable movement device is movable with the carriage, thus enabling simplified movement indirectly achieved through the movement of the carriage. The cable movement device can be arranged on the carriage. In particular, the cable movement device can be directly or indirectly connected to the carriage. An indirect connection is possible in which the cable movement device is connected to the carriage via a support that, for example, allows movement of the cable movement device relative to the carriage, in order to align the cable movement device, and especially its mounting, with respect to the direction of movement for the mounting. This alignment can simplify the design of the drive for moving the mounting.

[0050] The movement of the cable handling device can result directly from the movement of the carriage if the cable handling device is mounted on the carriage. Since the carriage is used to move the drill string, the simultaneous movement of the cable handling device and the carriage can simplify the components, equipment, devices, and the like that need to be moved. The necessary movement of the carriage can be used to move the cable handling device; the energy required to move the carriage can also be used to move the cable handling device. In particular, it can be provided that the end of the cable is moved away from the clamp by moving the cable handling device. This movement away from the clamp can essentially be achieved by moving the carriage.

[0051] If it is described that the cable movement device is movable with the carriage, it is not excluded that the cable movement device - especially after or before a movement together with the carriage - can move independently of the carriage.

[0052] Furthermore, movement together with the carriage can provide for a further simplification of the design of the cable movement device, since the end of the cable which is moved with the cable movement device can be in the area of ​​the drill shaft and thus an end of a rod shot to be applied, due to the arrangement of the cable movement device on the carriage.

[0053] In a preferred embodiment, the cable movement device comprises a kink-resistant, shear-resistant, and / or flexible element, on which the receptacle for the cable end is preferably arranged, particularly at the end. This allows for easy movement of the cable end by utilizing the element's properties, especially its ability to prevent kinking when inserted into a cavity of a rod section and to follow the longitudinal direction of movement within the cavity. In this respect, the adjectives used to describe the element can be used interchangeably or synonymously, particularly with regard to the element's ability to exhibit high elasticity, especially high shear elasticity. The element can also exhibit high shear stability.Such an element can bring about a further improvement and / or simplification in accordance with the invention, since such an element, which is arranged at the end of the receptacle, allows the receptacle to be advanced without being deflected and to follow the cavity. Those skilled in the art are aware of a wide variety of materials for a shear-resistant and / or bendable element, which, particularly under shear load and in the presence of a possible obstacle, does not buckle but bends in such a way as to avoid the obstacle, whereby a fiber-reinforced composite material, glass fiber, carbon fiber, or similar material can be used in particular. It is known that shear strength can be achieved not only by selecting a suitable material, for example, by using elements or sections of an arrangement that can form the element.This includes components that, when subjected to pressure in one direction, can "lock" together, thus achieving, for example, a positive fit when subjected to pressure in that direction. When subjected to pressure in the other direction ("tension"), the locking / positive fit can be released, and the links or sections of such an element can be unlocked and remain flexibly connected to one another.

[0054] The mounting can optionally be detachable from the element, allowing it to be separated. This accommodates the fact that the element may wear out due to abrasion or other mechanical stress and can be easily replaced. Alternatively, the mounting and the element can be screwed together. Specifically, the mounting can have an internal thread and the element an external thread that matches the internal thread of the mounting. Other connection methods are readily known to those skilled in the art.

[0055] A guide head may be provided for the element, supporting it in a specific position. This position may be part of the drive mechanism for moving the element with the end-mounted receptacle. The guide head may be movable and / or pivotable in space to align itself. The guide head may support an area of ​​the element that is close to the receptacle attached to the element. The receptacle can be indirectly aligned and / or positioned via the element using the guide head.It is possible to simplify the insertion of the receptacle into the cavity of a linkage section by combining the shear stiffness of the element with a suitable positioning of the guide head, in particular by imposing only a movement, especially a linear one, on the element, provided that the guide head with the receptacle and the element is in a corresponding position at the entrance of the cavity of the linkage section and a force for the movement is imposed on the element.

[0056] There are essentially two alternatives. Firstly, the guide head can occupy a defined and fixed position in space without any drives to move it relative to a reference point, which may be defined by a reference point on the carriage. In this case, it is preferred if a linkage section, through which the cable is to be moved, can be positioned in front of the guide head. Such a configuration can be advantageous because the cable movement device can be simple in design, and the alignment of the linkage section with the guide head can be handled by the linkage handling device.

[0057] On the other hand, the guide head can be moved relative to a reference point, which may be defined by a reference point on the slide. In the latter alternative, the guide head can be moved to the end of the newly inserted drill string section, which may already be aligned with the drill string axis. Pivoting, rotation, and / or translational movement of the guide head is possible.

[0058] It is possible for the guide head to have a sensor to determine its position relative to the end of a rod section. For example, the cable movement could be initiated only when there is sufficient alignment with the rod section. Automation of the process is possible.

[0059] In a preferred embodiment, a reservoir for the element, in particular a movable drum for the element, is provided, wherein the element can be wound onto the drum. This allows for a particularly simple design, which can also permit a compact configuration. Although the element can enable directed movement of the receiver, a reduction to a smaller volume and / or smaller dimensions is possible.

[0060] In a preferred embodiment, the cable movement device is arranged in the area of ​​the drill shaft, allowing it to be positioned adjacent to the area into which the drill string section is to be inserted. This position makes it easy to insert the end of the cable from this position into the drill string section to be attached to the drill string. It is particularly preferred that the cable movement device is arranged on the slide in the area of ​​the drill shaft.

[0061] In a preferred embodiment, the cable movement device is arranged outside the drill string axis, thereby achieving increased flexibility, as the available free space outside the drill string axis can be utilized. In particular, the cable movement device does not need to extend any parts through the drill shaft.

[0062] The directional specification "outside the drill string axis" implies that, in particular, the mounting of the cable movement device need not be aligned coaxially with the drill shaft. The cable movement device, especially its mounting and optionally the drive and the element, may be located outside a plane that includes the drill string axis and runs substantially parallel to a (guide) plane of the carriage for the slide and / or the base of the slide on the carriage. In particular, the mounting of the cable movement device may be arranged outside the drill string axis; preferably, the mounting, the drive for moving the mounting, and the optional element may be arranged outside the drill string axis.

[0063] In particular, the cable movement device can be arranged above the drill string axis, most preferably above the drill shaft, whereby the earth drilling device equipped with the cable movement device is extended in a direction in which a disturbance or impairment of other, in particular already existing, facilities, devices and the like is virtually excluded.

[0064] The term "outside the drill string axis" as used in this description includes, in addition to the particularly preferred embodiment "above," an arrangement to the right or left of the drill string axis. An arrangement below the drill string axis is also possible. Despite the preferred embodiment, an arrangement within the drill string axis is not excluded.

[0065] In a preferred embodiment, a cable reel is provided for the cable, allowing for a large supply of cable. Further automation is possible by enabling at least partial automatic access to the cable reel and the unwinding of the required length of cable. The cable supply can be in a manageable, compact form and protected from tangling or knotting. Furthermore, it is possible to determine the length of the cable as it is wound onto the reel and / or to record the used portion of the cable as it is unwound. In a particularly preferred embodiment, the cable supply comprises a cable with a length that corresponds at least to the length of three, four, or more rod sections.The cable stock can consist of a cable with a length of at least 50 m, preferably at least 60 m, preferably at least 70 m, preferably at least 80 m, preferably at least 90 m, preferably at least 100 m. Depending on the length of the borehole to be drilled, cable lengths of more than 100 m from the cable stock are also possible.

[0066] It may be provided that the cable reel is arranged around the drill string axis, thereby creating a particularly simple design and arrangement, which makes handling simpler.

[0067] For the purposes of this description, the term "arranged around the drill string axis" is to be understood as meaning that the central axis of the cable reel containing the cable supply is aligned concentrically with the central axis of the connection, which essentially coincides with the drill string axis. In particular, the cable supply or cable reel can be located externally and surround the drill string axis. Such an external feed may be preferable and allows for a simple design with minimal effort when replacing or refilling the cable reel with cable, as external access facilitates handling. This enables a space-saving design.

[0068] It is preferably possible that a cable feed with at least one guide roller, which may be designed as a deflection roller, is provided to ensure orderly cable feeding. This enables a feed where the cable supply can be arranged independently of the drill string axis and / or where a flexible arrangement of the cable supply is possible.

[0069] It is preferably possible to design the cable feed, particularly in the form of a rotary feedthrough, for axial feeding into the drill string axis. Several guide rollers can be provided to deflect the cable into the desired orientation and / or position.

[0070] A seal at the cable entry point to prevent the introduction of drilling fluid into the drill string is preferably possible. In particular, a seal can be used that essentially permanently closes an entry opening for the cable from the cable supply. Specifically, this opening can be located in a rotary feedthrough, coaxial with the drill string section to be attached, which is connected to the drill shaft. Handling steps can be further simplified by eliminating the need to manually form the seal each time. Drilling fluid – even under pressure – can be supplied to the drill shaft without escaping.

[0071] A rotary union can be used to align the cable axially with the drill string axis. In particular, the cable can be guided through the rotary union in a substantially centered manner, specifically aligned substantially with the central axis of the drill string. The rotary union can have an opening at one end for the cable coming from the cable supply. At the other end, the rotary union can have a connection to a drill string section or to a new drill string section that is to be connected to the already drilled string. The connection can rotate with the drill string, especially when a rotational movement is applied to the drill string. The drill shaft can be connected to the drill string directly or indirectly.

[0072] The cable supply can be arranged at the end of a rotary feedthrough, spaced apart from the drill shaft that comes into direct or indirect contact with a drill string. This allows the cable of the cable supply to pass through the rotary feedthrough or connection from the rear, or to extend at least partially or completely through the rotary feedthrough.

[0073] A tensioning device may be present. This device can be functionally connected to the cable supply and designed to maintain the cable under tension. This largely prevents the cable from being pinched, for example, when connecting the drill string sections. A potentially concentric cable feed allows the cable to be kept outside the area relevant for the mechanical connection of the drill string sections or the sections of the borehole string. The cable can thus be kept outside the elements intended for connecting the drill string sections, preventing cable breakage and / or cable tearing.

[0074] The invention also provides a method for inserting a drill string into the ground using an earth drilling device for cable-guided drilling. The earth drilling device comprises a carriage, a carriage movable back and forth on the carriage for pushing or pulling the drill string, which has sections of the drill string, along a drill string axis, and a clamp on the carriage. One end of the cable is moved in one direction along the longitudinal axis of the carriage by means of a cable movement device, whereby the end of the cable is moved away from the clamp.

[0075] The procedure can be carried out in particular using the control system described in the description.

[0076] The invention is described within the scope of this description by means of the design of a device and the design of a method. The descriptions of the individual aspects of the invention complement each other naturally. Descriptions of the device, which are described with regard to device-related features, also apply to the method, since in particular the method steps carried out by means of the device can be considered part of the method.

[0077] The foregoing statements, as well as the following description of an exemplary embodiment, do not constitute a waiver of certain embodiments or features.

[0078] The invention is explained in more detail below by way of example using an embodiment shown in the figures.

[0079] The drawings show: Fig. 1 The schematic isometric representation shows an earth drilling device for cable-guided drilling with a sled and a drill shaft arranged on the sled; Fig. 2 shows a detailed schematic isometric view of the earth drilling device according to Fig. 1 ; Fig. 3a shows in schematic isometric representation the earth drilling device according to Fig. 1 after the carriage has moved towards a clamp and has drilled the drill string; Fig. 3b shows an excerpt from Fig. 3a in enlarged view; Fig. 4a shows in schematic isometric representation a detailed view after the separation of the drill shaft from the drilled drill string according to Fig. 3 , where a cable is exposed; Fig. 4b shows the detailed view according to Fig. 4a after the cable was cut and one end of the cable was fixed in a holder; Fig. 5 The schematic isometric representation shows a detailed view after the drill shaft and the holder have been moved away from the clamp and a drill string section to be attached to the drill string has been brought into the area of ​​the drill string axis; Fig. 6 A schematic cross-sectional view shows the situation of Fig. 5 , after the recording has been pushed through the drill string with the end of the cable; Fig. 7 The schematic isometric representation shows a detailed view after the end has been connected to the cable in the drill string and the receiver has been moved back by the drill string; Fig. 8 The schematic isometric representation shows a detailed view of the earth drilling device after the drill string section to be attached to the drill string has been inserted. Fig. 7 was moved into the drill string axis; and Fig. 9 shows a detailed schematic isometric view of the earth drilling device according to Fig. 8 after the drill shaft was connected to the drill string and the drilled drill string.

[0080] Figur 1 Figure 1 shows a schematic isometric representation of an earth drilling device 1 for cable-guided drilling. The earth drilling device 1 has a carriage 2 and a carriage 3 that can be moved back and forth on the carriage 2. The carriage 2, together with the guide of the carriage 3, defines a guide plane that runs essentially parallel to a base surface of the carriage 3.

[0081] A drill string can be inserted into or withdrawn from the ground using the carriage 3. The drill string can be assembled from drill rod sections 4 stored in a drill rod magazine 5. A transfer device 7 is provided for transferring a drill rod section 4 from the drill rod magazine 5 into a drill rod axis L, as shown in Fig. 1 The transfer device 7, shown with a dashed line, can be moved. It can also hold a drill string section 4 in an intermediate position between the drill string magazine 5 and the drill string axis L.

[0082] From the in Fig. 1 In the position or location shown, the drill string 4 can be connected to a drill string already in the ground and, together with the drill string already in the ground, can be inserted further into the ground.

[0083] A clamping device 14 is provided, by means of which the already drilled drill string can be clamped in order to detach the drill shaft 6 from the already drilled drill string and, for example, to attach another drill string section 4 to the drill string. Such a situation is in Fig. 1 The drill string section 4, located in the drill string axis L, can be connected to the drill string to extend it and inserted into the ground.

[0084] A drill shaft 6 is arranged on the carriage 3, which can be brought into engagement with the drill string section 4 located in the drill string axis L. The drill shaft 6 can be inserted into the Fig. 1 Engage the right end of the drill string section 4 as shown and connect it to the last drill string section 4 of the already drilled drill string and push it further into the ground.

[0085] Figur 2 shows a detailed view of earth drilling device 1 of Fig.1 , showing a view from the other side of the earth drilling device, with the rod magazine 5 and the transfer device 7 being omitted in particular for better illustration of the other elements. Figur 2 The figure essentially shows the carriage 3 with the drill shaft 6, a cable movement device 8, and a supply for a cable 10. The supply for the cable 10 is designed as a cable reel 9. The cable movement device 8 has a receptacle 11 for one end of the cable 10, an element 12, and a drive 13 for the element 12.

[0086] Figur 3a Figure 1 shows the earth drilling device 1 (essentially reduced to carriage 2 and slide 3) after the insertion of the drill rod 4 into the ground, with the area of ​​the earth drilling device 1 marked with a dashed rectangle Q in Fig. 3b is shown enlarged. In the Fig. 3a and bIn the depicted situation, the drill shaft 6 is still connected to the drill string or the last drill section 4 of the drill string. The cable 10 is routed through drill section 4 and extends through the drill shaft 6 to the cable reel 9.

[0087] In Fig. 4a Figure 1 shows how the drill shaft 6 is separated from the drill string section 4 and the cable 10 is exposed between the end of the drill string and the drill shaft 6 in the area of ​​the clamp 14. The cable 10 can now be handled such that the cable 10 is as shown in Figure 1. Fig. 4b The cable is cut, and the end 15 of the cable 10 connected to the cable reel 9 is fixed in the receptacle 11 of the cable movement device 8. The carriage 3 retracts together with the cable movement device 8, and a drill rod section 4 to be attached to the drilled section is taken from the drill rod magazine 5 into a Fig. 5 The position shown was brought into place. Fig.5 The drill string section 4 shown is in a position outside the drill string axis L, essentially parallel to it, and is held in this position by the transfer device 7.

[0088] The receptacle 11 is located outside the drill string axis L. The receptacle 11 is positioned in front of a guide head 17, which guides the element 12 in the area of ​​the guide head 17. The receptacle 11 is essentially aligned with the end opening of the drill string section 4 and can be inserted into the drill string section 4 longitudinally along the drill string axis L by means of the drive 13 together with the end 15 of the cable 10. Movement of the receptacle 11 or the guide head 17 can lead to a change in the alignment of the receptacle 11 with respect to the drill string section 4.

[0089] The receptacle 11, aligned with the drill string section 4, is driven by the drive 13, which moves the element 12 longitudinally through the guide head. The receptacle 11 moves longitudinally to the drill string axis L through the drill string section 4 together with the end 15 of the cable 10. The element 12 is shear-resistant and wound onto a drum 16. As the receptacle 11 moves through the drill string section 4 towards the clamp 14, the element 12 is unwound from the drum 16.

[0090] Figur 6 Figure 11 shows a cutaway view of the situation when the receptacle 11, with the end 15 of the cable 10, has been passed through the drill string section 4. An operator present in the area of ​​the clamp 14 can connect the end 15 of the cable 10 to the cable 10 located in the drilled section by removing the end 15 of the cable 10 from the receptacle 11 and connecting it to the other cable 10 in the drill string. The receptacle 11 can then be passed through the drill string section 4 again by retracting the element 12, which is done by the drive 13. The receptacle 11 is then moved away from the clamp.

[0091] In Fig. 7 The situation is shown in which the retracted receiver 11 is located outside the drill string section 4 and the cable 10 extends from the drill shaft through the drill string section 4 to the drilled drill string.

[0092] Figur 8 Figure 1 shows the situation after the transfer device 7 has moved the drill string section 4 into the drill string axis L. The cable 10 can be tensioned by means of a tensioning device. The cable 10 runs essentially straight through the drill shaft 11, the drill string section 4, and the already drilled drill string.

[0093] Fig. 9 This shows the situation after the drill shaft 6 has been engaged with the drill string 4 and the drill string 4 can be inserted into the ground together with the already drilled drill string.

Claims

1. Earth drilling device (1) for cable-guided drilling with a carriage (2) and a carriage (3) movable back and forth on the carriage (2) for moving a drill string having rod sections (4) along a drill string axis (L), wherein the earth drilling device (1) has a clamp (14) for the drill string on the carriage (2), characterized by the fact that a cable movement device (8) for moving an end (15) of the cable (10) is provided, by means of which the end (15) of the cable (10) can be moved in a direction along the longitudinal direction (L) of the carriage (2), wherein the cable movement device (8) is designed for a movement of the end (15) of the cable (10) away from the clamp (14).

2. Earth drilling device (1) according to claim 1, wherein the cable movement device (8) is also movable to move the end (15) of the cable (10) in a direction along the longitudinal direction (L) of the carriage (2), which is a movement in the direction of the clamping.

3. Earth drilling device (1) according to claim 1 or 2, wherein the cable movement device (8) has a receptacle (11) for the end (15) of the cable (10).

4. Earth drilling device (1) according to one of claims 1 to 3, wherein the cable movement device (8) has one or more drives (13) which can be controlled by means of a control system.

5. Earth drilling device (1) according to one of claims 1 to 4, wherein the cable movement device (8) is translationally movable relative to the carriage (2) and / or the cable movement device (8) is pivotable relative to the carriage (2).

6. Earth drilling device (1) according to one of claims 1 to 5, wherein the cable movement device (8) is movable with the carriage (3).

7. Earth drilling device (1) according to one of claims 1 to 6, wherein the cable movement device (8) has a kink-resistant, shear-resistant and / or bendable element (12) on which a receptacle (11) for the end (15) of the cable (10) is preferably arranged.

8. Earth drilling device (1) according to claim 7, wherein a supply for the element (12), in particular a movable drum (16) for the element (12), is provided, wherein the element (12) can be wound on the drum (16).

9. Earth drilling device (1) according to one of claims 1 to 8, wherein the cable movement device (8) is arranged in the area of ​​a drill shaft (6) which is arranged on the carriage (3).

10. Earth drilling device (1) according to one of claims 1 to 9, wherein the cable movement device (8) is arranged outside the drill string axis (L).

11. Earth drilling device (1) according to one of claims 1 to 10, wherein a cable reel (9) for the cable (10) is provided.

12. Method for inserting a drill string into soil using an earth drilling device (1) for cable-guided drilling, wherein the earth drilling device (1) comprises a carriage (2), a carriage (3) movable back and forth on the carriage (2) for pushing or pulling the drill string having drill rod sections (4) along a drill rod axis (L), and a clamp (14) for the drill string on the carriage (2). characterized by the fact that one end (15) of the cable (10) is moved by means of a cable movement device (8) in one direction along the longitudinal direction (L) of the carriage (2), whereby the end (15) of the cable (10) is moved away from the clamp (14).

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