EP3029263A1 - Drive of a ground drilling device, ground drilling device and method for driving of a ground drilling device - Google Patents

Abstract

The invention relates to a drive for a reciprocally movable carriage (5) of a Erdbohrvorrichtung for moving a linkage, wherein in a frame (6) relative to a cylinder (2) movable rod (7) and Zugübertragungsmittel (1) are present, which engage on the carriage (5), the rod (7) being connected to the frame (6), and deflection rollers (3, 4) for the traction transfer means (1) on the frame (6) and on the cylinder (2).

Description

The invention relates to a drive for a Erdbohrvorrichtung for moving a linkage, a Erdbohrvorrichtung and a method for driving a carriage for moving a linkage of a Erdbohrvorrichtung.

Erdbohrvorrichtungen, in particular horizontal drilling are used to bring in trenchless construction Erdbohrungen, for example, for supply and disposal lines in the ground or already laid old lines trenchless exchange. For the introduction of the well bore usually a Bohrgestängeschüsse exhibiting drill pipe is used, in which the Bohrgestängeschüsse are connected to each other.

It is for example off EP 0 886 034 B1 It is known to use a reciprocating carriage in a frame for advancing and / or pulling a drill pipe. The carriage has a receptacle for a Bohrgestängeschuss, so that the Bohrgestängeschuss can be moved in the direction of a feed axis for, creating the Erdbohrung in the recording. The drive acting on the Bohrgestängeschuss can act rotationally and / or translationally on the Bohrgestängeschuss in the recording.

The drive for moving the carriage in the frame can by means of a rack which is fixedly connected to the frame and a hydraulic motor which a gear, which is mounted on the carriage to be moved. Furthermore, a cylinder pack of adjacent cylinders can be used.

Furthermore, it is off DE 20 64 862 known to move a platform on hawsers and a pulley or rollers. The hawser is placed over a rotatable roller carried by a bracket at one end of the boom and is guided along the boom to run around another roller which is carried by a bracket held on a piston of a double acting hydraulic ram returned to the boom.

A disadvantage of the known from the prior art method is that at low feeds not the full power delivery is implemented, which is particularly the case with the cylinder packs of several adjacent cylinders. Furthermore, the high costs are disadvantageous. The use in a pit is not optimal, since the construction is too large-scale and / or a desired Bohrgestängenutzlänge is not achieved.

The invention therefore an object of the invention to provide an improved drive for a Erdbohrvorrichtung, which is improved over at least one of the aforementioned disadvantages. In particular, a compact design with an increased Bohrgestängenutzlänge should be achieved.

The object is solved by the subject matters of the independent claims. Advantageous developments of the subjects of the independent claims are the subject of the respective dependent claims and will become apparent from the following description.

The core idea of the invention is the combination of an element which can be extended relative to another element and the use of pulley train transmission means, wherein pulley pulley deflection pulleys are arranged on the element which is the element from which the other element extends.

The drive for a reciprocally movable carriage of an earth boring device for moving a drill string has a rod movable in a frame relative to a cylinder and tension transmitting means engaging the carriage. The rod is connected to the frame and pulleys for the traction transfer means are provided on the frame and on the cylinder. The design is simple and inexpensive, with a high efficiency can be achieved even at very low speeds of movement of the carriage. In addition, will saved by the attachment of the pulleys for the train transmission means on the cylinder space, which can allow a compact design of the drive.

Under a "Erdbohrvorrichtung" is in particular any device understood that a Bohrgestängeschüsse having Bohrgestänge moved in an existing or to be created channel in the ground to create a bore, in particular a horizontal bore (HD), or expand lines or other long body in to collect the soil. The earth boring device may in particular be an HD device. An "earth boring device" according to the invention comprises a device which drives a drill pipe and works in a soil-displacing manner, and introduces the drill pipe into the earth in a rotational and / or translatory manner in the longitudinal axial direction of the drill string.

The term "HD" (horizontal drilling, horizontal drilling) in the context of the present invention comprises in particular any type of existing or to be created, preferably horizontal channels in a body, in particular earth channels including earth boreholes, rock holes or ground lines and underground or above-ground pipelines and water channels can be made or retracted by using a corresponding Erdbohrvorrichtung.

The term "at least one" as used in the claims or in the specification, as well as the indefinite article "a" used in the claims or in the specification - also in corresponding grammatical expressions relating to genus and declination - includes in relation to FIG taken consecutive nouns exactly one or more, ie two, three, four, etc., the elements denoted by the noun.

The term "carriage" according to the invention comprises a body with a receptacle for a Bohrgestängeschuss, wherein by means of recording the Bohrgestängeschuss can be driven translationally and / or rotationally. In particular, the carriage may be guided in the frame for a translational movement along a path. The carriage can rest on a frame connected to the support with Aufstandselementen. The support can be profiled and the riot elements can be designed as rollers. There are also possible as uprising elements runners. The carriage can be guided on the frame hanging and / or resting. The carriage can thus be a machine element which can be moved along a path, in particular purely translationally, in the frame.

The term "frame" according to the invention comprises a box-shaped or cuboid structure whose side walls and / or struts or bars pressure, train and can also transmit bends. The frame according to the invention preferably has a quadrangular elevation and can be placed in a pit to create the wellbore. Preferably, drive unit and slide are arranged in the frame. In order to fix the device in the pit, the frame can be provided with horizontally extendable clamping supports, via which the recoil forces can be introduced into the soil.

In a preferred embodiment, the cylinder is a hydraulic cylinder and the rod is a piston rod on the hydraulic cylinder, so that a low-cost hydraulic cylinder can be used. A hydraulic cylinder can be used well under the harsh conditions encountered in earth boring. Hydraulic fluid and pumps required for operation are inexpensive for use.

Preferably, the traction transfer means, short traction means, is a rope or a chain, whereby easily formed, stable traction transfer means, which are selectable according to the respective requirement requirements, can be used.

Preferably, one end of the traction transfer means is attached to the frame, whereby a connection to a particularly stable component contributes to the stability of the drive.

The invention also provides an earth boring device having a carriage arranged in a frame for advancing a drill string and a rod which can be extended relative to a cylinder, with tension transfer means being mounted on the carriage for movement of the carriage. The rod is connected to the frame and the train transmission means are guided over the frame and the cylinder mounted pulleys.

In a particular embodiment, the pulleys mounted on the cylinder are arranged with their axis of rotation fixed to the cylinder. In this case, a double-acting standard cylinder can be used, because the drive can be oriented or oriented so that lower forces are required for the advance in the direction of the earth bore (piston ring space as effective area) than for the withdrawal (entire piston area as effective area). Such a cylinder is referred to as a "differential cylinder" having only a piston rod and thus a piston surface and a smaller piston ring surface. As a result, higher forces for the power collection can be provided. While in a so-called "synchronous cylinder" the applied surfaces are usually the same size for both strokes and thus the forces generated are the same size, this is different in a differential cylinder in the aforementioned manner.

By a suitable choice of the diameter of the pulleys on the cylinder relative to the diameter of the cylindrical rollers which are fixed to the frame, train transmission means can be guided past each other. The rollers arranged on the cylinder preferably have a smaller diameter than the deflecting rollers mounted on the frame, in particular a ratio of the diameters of 1: 1.3 to 1: 1.7, very particularly preferably 1: 1.5 may be selected.

The invention also provides a method of driving a carriage mounted in a frame to move a drill pipe of an earth boring device, the method comprising the steps of: moving a pulley mounted on a cylinder opposite a rod mounted in the cylinder and secured to the frame ; and applying a guided via the pulley train transmission means which engages the carriage, with train.

The above statements as well as the following description of exemplary embodiments do not represent a waiver of certain embodiments or features.

The invention will be explained in more detail with reference to an embodiment shown in the drawings.

Fig. 1

eine isometrische Darstellung einer Erdbohrvorrichtung schräg von der Seite; und

Fig. 2

die Erdbohrvorrichtung gemäß Fig. 1 ohne Schlitten und Umlenkrollen in isometrischer Darstellung schräg von oben.

In the drawings shows:

Fig. 1

an isometric view of a Erdbohrvorrichtung obliquely from the side; and

Fig. 2

the earth boring device according to Fig. 1 without carriage and pulleys in isometric view obliquely from above.

Fig. 1 shows a Erdbohrvorrichtung for performing a well bore. The Erdbohrvorrichtung has a in a frame 6 reciprocable carriage 5, which rests on a support. The support is configured and profiled as a guide for uprising elements of the carriage 5.

To drive the back and forth movable carriage 5 is a relative to a cylinder 2 movable rod 7 is present. The cylinder 2 is a double-acting cylinder, with which work can be performed in both directions. The rod 7 is attached to the frame 6 end.

The drive further comprises tension transmission means 1 in the form of ropes. On the carriage on each side two pull transmission means 1 in the two directions of movement of the carriage 5 at. Each tensile transfer means 1 is guided via a deflection roller 3 on the frame 6 and via a pulley 4 attached to the cylinder 2. The other end of the tension transmission means 1 is in each case firmly connected to the frame 6. There are four traction transfer means 1, two on each side of the carriage 5.

Of the Fig. 1 It can be seen that two pulleys 4 are arranged laterally on the cylinder 2. The pairs of pulleys 4 are opposite each other. The two pulleys 4 one side are arranged side by side. Again Fig. 1 can be seen, the axes of rotation of the two pulleys 4 a side parallel to each other offset. Also is the Fig. 1 it can be seen that the deflection rollers 3 and the deflection rollers 4 on one side are arranged essentially in one plane. The axes of the deflection rollers 3, 4 of a side substantially parallel to each other and the deflection rollers 3, 4 are arranged substantially at the same height, as it Fig. 1 shows. In addition, the articulation or attack points of the train transmission means 1 on the frame 6 and the carriage 5 on one side in a plane with the deflection rollers 3, 4 of the corresponding side, as it Fig. 1 shows.

From the in Fig. 1 shown position of the cylinder 5 in the frame 6, the carriage 5 in a movement of the cylinder 2 to the rod 7 - in movement to the right in the view of Fig. 1 - proceed. The pulleys 4, which are fixedly mounted on the cylinder 2, are used as movable rollers to drive the carriage 5 similar to a pulley. The force on the carriage 5 is half as large as the force of the cylinder 2. The carriage 5 can cover twice the distance traveled by the cylinder 2 with respect to the rod 7.

In Fig. 2 is in a view from the top in Fig. 1 shown Erdbohrvorrichtung without pulleys 4 and carriage 5 shown.

Claims (10)

Drive for a reciprocally movable carriage (5) of an earth boring device for moving a linkage, wherein in a frame (6) there is a rod (7) which can be moved relative to a cylinder (2) and tension transmission means (1) which are mounted on the carriage ( 5), characterized in that the rod (7) is connected to the frame (6), and pulleys (3, 4) for the traction transfer means (1) on the frame (6) and on the cylinder (2) are present. Drive according to claim 1, characterized in that the cylinder (2) is a hydraulic cylinder and the rod (7) is a piston rod on the hydraulic cylinder. Drive according to claim 1 or 2, characterized in that the cylinder (2) is a double-acting cylinder. Drive according to one of claims 1 to 3, characterized in that the tension transmission means (1) are cables and / or chains. Drive according to one of claims 1 to 4, characterized in that one end of the traction transfer means (1) on the frame (6) is fixed. An earth boring apparatus with a in a frame (6) arranged feed carriage for feeding a rod and a with respect to a cylinder (2) extendable rod (7), wherein the feed slide traction transfer means (1) are mounted for movement of the feed slide, characterized in that the rod ( 7) is connected to the frame (6), and the traction transfer means (1) on the frame (6) and on the cylinder (2) mounted deflection rollers (3, 4) are guided. Erdbohrvorrichtung according to claim 6, wherein the deflection rollers (4) mounted on the cylinder (2) are arranged with its axis of rotation fixed to the cylinder. An earth drilling device according to claim 6 or 7, wherein the deflection rollers (4) arranged on the cylinder (2) have a smaller diameter than the deflection rollers (3) mounted on the frame (6). Ground boring device according to claim 6, wherein two deflection rollers (4) are arranged offset parallel to one another on one side of the cylinder (2). A method for driving a carriage (5) arranged in a frame (6) for moving a linkage of an earth boring device, the method comprising the following steps: Moving from a deflection roller (4) mounted on a cylinder (2) opposite a rod (7) mounted in the cylinder (2) and secured to the frame (6); - Applying a train on the pulley (3) guided train transmission means (1) which engages the carriage, with train.

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