DE102017211457B4 - Drill pipe, mobile unit as well as method - Google Patents

Abstract

Drill rods (1) with several rod elements (1a-1c; 2; 3), a coupling element (20) being provided in the region of the interface between two rod elements (1a-1c; 2; 3), which coupling element (20) has: a first connecting element (30) and a second connecting element (40) which can be rotated relative to one another, the first connecting element (30) having a first rod element (1a-1c; 2; 3) of the drill rod (1) and the second connecting element (40) a second rod element (1a-1c; 2; 3) of the drill rod is connectable, wherein the coupling element (20) has an inclination measuring system (50), wherein one or more rod elements (1a-1c; 2; 3) a detection point, a magnet or have a profile that can be detected by an orientation clamp (110).

Description

Technical area

The present invention relates to a drill rod which is used, for example, in the field of civil engineering. Such drill rods are used to produce a borehole and, for example, a so-called nozzle jet column in the subsurface. A drill rod is also used in a so-called soil freezing process. The invention also relates to a mobile unit and a method.

State of the art

The state of the art is DE 10 2013 205 319 A1 known, which shows a drill and jet pipe. This comprises an air duct running in the drill and jet pipe and a pressure duct. A cable routing channel for receiving a cable section is arranged within the pressure channel. The cable can have a connection that engages in a corresponding counterpart in the adjacent element when individual elements of the drilling and jet assembly are screwed together. In this way it is possible to transmit data from the drill bit of the drill and jet pipe to the surface.

When the drilling and nozzle jet rods are brought in, they are rotated and the rotation of the rods is recorded by an incremental stator / rotor. In the area of the drill bit, an inclination sensor is provided which shows the inclination of the rod in a certain position. After the rotary position of the rods and the inclination position in the area of the drill bit are recorded step by step during the drilling process, the course of the borehole can be traced.

Furthermore, the document is US 2007/0194946 A1 is known in which an apparatus is described having a signal coupler disposed at one end of a tubular drilling component.

The publication US 2005/0095827 A1 Figure 10 shows a connector for a coaxial cable, the connector being in electrical contact with an inductive transducer.

Subject of the invention

The aim of the present invention is to further refine the detection options for determining the borehole course, to simplify the measuring process and to provide the greatest possible flexibility for the design of a drill string.

The subject matter of claim 1 provides a drill string with which the stated objects can be achieved. Further preferred embodiments can be found in the dependent claims. The invention also relates to a mobile unit and a method for determining the course of a borehole.

One idea according to a first aspect of the invention is to provide a coupling element for a drill pipe, in particular a drill and jet pipe, with which the inclination of a pipe element can be determined. If corresponding coupling elements are attached to several interfaces of rod elements of the drill rod, the borehole course can be determined on the basis of several measuring points.

The drill rod according to the invention has several rod elements, a coupling element being provided in the region of the interface of two rod elements, which coupling element has: a first connecting element and a second connecting element which can be rotated relative to one another, the first connecting element with a first rod element of the drill rod and the second connecting element can be connected to a second rod element of the drill rod, wherein the coupling element has an inclination measuring system (for detecting the spatial orientation). Furthermore, one or more linkage elements have a detection point, a magnet or a profile that can be detected by an orientation clamp.

Thus, in the area of the coupling element, the inclination can be determined which, when the coupling element is mounted on a linkage element, corresponds to the inclination of the linkage element in this area.

The claimed device also has the advantage that an exact determination of the borehole course is made possible, while waiting and reading times are avoided during the drilling process. Furthermore, the use of a coupling element enables the system to be expanded as desired. Coupling elements can also be implemented as a retrofit solution.

According to a preferred embodiment, it is provided that at least one contact element, preferably a plurality of contact elements, is provided on the first connection element, which contact element rests against a section of the second connection element. In this way, an electrically conductive connection can be provided between the first connecting element and the second connecting element. Thus, data and / or electrical energy can be transferred from the first Connecting element are transmitted to the second connecting element. Furthermore, actuators such as pumps, motors or sensors can be operated and / or read out via the coupling elements.

The contact element can rest elastically against a section of the second connecting element, and / or a sliding contact can be established by the contact element.

The contact of the connecting elements by means of the contact element makes it possible to transmit electrical energy and / or data from one connecting element to another, and thus from one linkage element to the next. At the same time, it is ensured that the rod elements can be screwed together during assembly. The data transmission can take place by triggering the current transmission.

It is preferred that the second connecting element is introduced in sections into an opening area of the first connecting element. In this way, the connecting elements can be combined with one another without any effort.

It is preferred that the at least one contact element is a wire-shaped contact clip, the contact clip preferably having two connection ends and a contact area connecting them. Contact can thus be guaranteed with a high degree of security.

It is preferred that the first connection element and / or the second connection element comprise a connection area for a line, the line establishing a connection to a further coupling element. In particular, the line is guided within a linkage element.

It is preferred that the inclination measuring system (for detecting the spatial orientation) has a first inclination sensor and a second inclination sensor, it being preferred that the inclination sensors are mounted on circuit boards. Since the spatial alignment of an area of the rod element can be documented, it is possible to determine the borehole course when using several inclination measuring systems.

It is further preferred that a first inclination sensor of the inclination measuring system is received in a circumferential groove of a base body of the first connecting element. A robust and at the same time functional arrangement can thus be provided.

According to a further embodiment, it is provided that the first connecting element has a base body and a cover attached, in particular screwed, to its outer circumference, the cover preferably being designed as a cylindrical tube.

According to a further aspect, the invention relates to a drill rod with several rod elements, wherein a coupling element is provided in the area of the interface of two rod elements, which coupling element has: a first connecting element and a second connecting element, which can be rotated relative to each other, the first connecting element with a first Rod element of the drill rod and the second connection element can be connected to a second rod element of the drill rod, with at least one contact element, preferably several contact elements, being provided on the first connection element, which contact element rests, in particular elastically, against a section of the second connection element. Furthermore, one or more linkage elements have a detection point, a magnet or a profile that can be detected by an orientation clamp.

By contacting the connecting elements by means of the contact element, it is possible to transmit electrical energy and / or data from one connecting element to another, and thus from one linkage element to the next. At the same time, it is ensured that the rod elements can be screwed together during assembly. The data transmission can take place by triggering the current transmission.

The aforementioned aspects or individual subclaims can be combined with the coupling element according to this further objective.

According to a preferred embodiment it is provided that a coupling element is provided in the end region of a linkage element, the coupling elements being connected by means of a line for data and / or energy transmission.

The coupling elements should preferably be integrated into the drill pipe. In this way, the coupling can be made robust for use on the construction site.

The invention further relates to a mobile unit with a drill pipe according to one of the aforementioned aspects and a holding device for the drill pipe, which drill pipe has coupling elements, the coupling elements each having a contact element, preferably a plurality of contact elements, in order to provide a contact for the transmission of electrical energy and / or data. The mobile unit has an orientation clamp to detect an offset angle between string elements of the drill string by detecting a detection point.

As an alternative or in addition to the contact element, the coupling element can have an inclination measuring system (for detecting the spatial alignment).

According to a further embodiment, the mobile unit has a distance sensor, in particular a laser distance sensor or a cable potentiometer, for determining the drilling depth. The data determined by the distance sensor can be integrated directly into the determination of the borehole course.

The data determined by the orientation clamp can be used to determine the relative rotation of the rod elements with respect to one another. The relative rotation can vary in particular in the case of linkage elements that are screwed together.

The invention also relates to a method for determining a borehole course, in particular a borehole course produced with a drill pipe according to one of the above aspects, comprising the steps: determining an offset angle between the rod elements (for example by means of the aforementioned orientation clamp), determining the (preferably spatial) inclination of each string element, and determining the borehole path based on the offset angles, the length of each string element, and the orientation of each string element. It is preferred that the drilling depth is determined by means of a distance sensor.

It is preferred that an offset angle be mediated between the rod elements during drilling, and / or after the final depth has been reached, the inclination of each rod element and the borehole course are determined. The determination of the borehole course can thus be carried out in a comparatively uncomplicated manner.

Figure list

• 1 shows a drill string according to the present invention in use with a mobile unit,
• 2a is a schematic representation of a cross section of a drilling and nozzle jet rods equipped with several coupling elements according to the invention,
• 2 B is a detailed view of 2a ,
• 2c shows a portion of 2 B ,
• 3 shows an embodiment of the coupling element used in the drill and nozzle jet rods,
• 4th shows that in 3 shown coupling element in partially open state,
• 5a shows the in 1 Orientation clamp shown in detail,
• 5b is another view of the in 5a orientation clamp shown.

Detailed description of the preferred embodiments

A preferred embodiment of the present invention is explained in detail below with reference to the accompanying figures. Further modifications of certain individual features mentioned in this context can each be combined with one another in order to form new embodiments.

1 shows a mobile unit 100 over a vertically erected holding device 101 a drill and nozzle steel rod 1 (also referred to here simply as "drill rods").

The jet linkage 1 comprises several linkage elements 1a-1c , a drill bit 2 and, in the present exemplary embodiment, an additional function module 3 (see also 2a-2c ). Although in 2a only an exemplary number of linkage elements is shown (here: 3 Linkage elements), it can be seen that the system can be expanded as required.

The linkage elements can have the same or different lengths. For example, rod elements have a length of 1 to 3 meters.

With the nozzle steel rod 1 After drilling and after reaching a final depth, a nozzle jet column can be installed D. can be generated by the drill pipe 1 rotated about its axis while rotating the drill string 1 a suspension, in particular cement suspension, is introduced into the surrounding soil under high pressure.

The jet cuts into the subsoil and brings the suspension into a certain circumferential area of the drill rod 1 a. The suspension mixes with the surrounding soil. The nozzle jet column is created by hardening the suspension mixed with the soil D. that are used for a variety of purposes, e.g. as Foundation or as an element for sealing an excavation, can be used.

On the holding device 101 the mobile unit 100 is a so-called stationary box 102 provided, which receives a control device. The stationary box 102 can also be used on the mobile unit 100 or be provided separately.

A rotary encoder 103 is in the present embodiment in the area of the stationary box 102 on the holding device 101 provided in such a way that the rotary encoder 103 a differential angle to the drill pipe 1 can accommodate. During the previously mentioned drilling, the difference angle results from a rotary movement of the drill rod 1 .

It is also on the holding device 101 a distance sensor 104 provided with which the drilling depth based on the position of the distance sensor 104 can be determined in relation to the subsurface. The distance sensor 104 is designed in the present embodiment as a laser distance sensor, so that it is made relatively robust and can be used flexibly. As an alternative to a laser distance sensor, a pull-wire potentiometer can be used.

In a lower area of the holding device in the vertical direction 101 is a so-called orientation clamp 110 provided through which the drill pipe 1 extends in sections. One along the holding device 101 guided connection cable 105 connects the orientation clamp 110 with the stationary box 102 . As an alternative or in addition to a wired connection, data can also be transmitted wirelessly, for example by means of radio, a Bluetooth connection or the like.

The orientation clamp 110 enables the offset angle of the individual linkage elements to be recorded. In particular, it will always be a magnet R1 a rod element when drilling through the orientation clamp 110 is detected, the angle on the rotary encoder 103 queried (see 5a , 5b) . Alternatively or in addition to the detection of the magnet R1 a profile, for example a depression, on the linkage or a geometric recognition point on the surface of the linkage can also be recorded.

The drill pipe 1 can also be equipped with a GPS module in order to determine the position of the borehole in addition to the determined data relating to the course of the borehole. The information about the determined borehole course can thus be combined with the position data of the borehole.

In 2a-2c are the individual elements of the exemplary drill pipe 1 explained.

The drill pipe 1 comprises a variety of linkage elements 1a-1c that are used to form the drill string 1 be connected to each other. In this context, screw or plug connections are known, wherein in the 2a-2c a drill pipe with screw connections is shown.

In 2 B is a first end area of the linkage element 1b with the reference number 1b-1 and a second end portion of the linkage element 1b with the reference number 1b-2 Mistake. At the first end area 1b-1 is an internal thread and at the second end area 1b-2 formed an external thread. Inside the linkage element 1b runs a line 1b-3 who have one at the first end area 1b-1 the linkage element provided coupling element 20th with one at the second end area 1b-2 of the linkage element 1b provided coupling element 20th connects.

The administration 1b-3 can be used to transfer data and / or energy, or several lines are provided for this purpose. The transmission of data along a linkage element can also take place wirelessly according to an alternative variant.

In the area of the tip of the drill pipe 1 is the drill bit 2 arranged, which is provided for forming the drill channel and has one or more lateral openings in addition to a drilling area. Through the openings in the drill bit 2 or a nozzle monitor, a cement suspension can be injected into the subsoil under high pressure, around a nozzle jet column D. to train.

Between the drill bit 2 and a linkage element 1c is a functional module in the illustrated embodiment 3 inserted, which can be equipped with measuring systems, for example. With these measuring systems, for example, samples can be taken from the ground and / or other data can be determined with appropriate sensors. An example of a function module 3 is in the EP 2 543 770 A1 described. Alternatively or additionally, the function module can accommodate an actuator such as a motor or pumps, possibly in combination with certain sensors.

After according to the described embodiment between each of the linkage elements 1a-1c as well as the function module 3 such a coupling element 20th is provided, data and / or energy can be transmitted from one linkage element to the next linkage element. The transmission takes place along the linkage element of data and / or energy by means of a cable (in 2 B using the cable as an example 1b-3 explained.

Furthermore, a coupling element can also be used between the drill bit 2 and the function module 3 , if one is integrated, can be used.

In the schematic representation of 2c is the coupling element 20th in the coupling area between two rod elements 1a , 1b a drill pipe 1 shown in detail. The coupling element 20th is used when assembling the drill pipe 1 connected to a linkage element, in particular introduced into a coupling area.

The coupling element 20th comprises a receiving element 30th (first connecting element) and a cylinder element 40 (second connecting element), the latter being designed as a hollow shaft. On the linkage element 1a is a first line (for example, line 1a-3 ) appropriate. The line provides a connection to an adjacent coupling element 20th forth which adjacent coupling element 20th is arranged at another end portion of the corresponding linkage element.

The cylinder element 40 is in sections in the receiving element 30th (first connecting element) introduced. The cylinder element 40 and the receiving element 30th are rotatable relative to each other. Thus, the coupling element 20th well into a drill pipe 1 to get integrated. The assembly of the individual rod elements by means of a screw connection can be achieved by the relative rotatability of the receiving element 30th and the cylinder element 40 guaranteed.

The cylinder element 40 is with a rod element (e.g. rod element 1a ) connected, and the receiving element 30th with an adjacent rod element (e.g. rod element 1b ).

On a circumferential section 42 of the cylinder element 40 a contact area is provided so that, as described below, energy and / or data transmission between the cylinder element 40 and the receiving element 30th can be guaranteed.

The receiving element 30th includes an opening area 31 into which the cylinder element 40 is rotatably introduced. Thus, the opening area 31 a slightly larger diameter than the outer diameter of the cylinder element 40 .

The opening area 31 when viewed in cross section, extends approximately to the center of the receiving element 30th . Starting from the opening area 31 an opening extends which has a smaller diameter than the opening area 31 .

At one end portion of the receiving element 30th are contact clips 33 (Contact elements) provided that when the cylinder element is inserted 40 elastic against the contact area of the cylinder element 40 issue. The contact bracket 33 comprise two connection ends in the embodiment shown 33a , 33b and a contact area connecting them 33c .

The contact bracket 33 are formed in one piece with a wire in the embodiment shown. In further embodiments (not shown), the contact clip can also be constructed in several parts and / or from one or more elements.

Also, a spring can be received in the receiving element for a contact clip, which preloads the contact clip.

Since the contact bracket 33 elastic at a contact area of the cylinder element 40 contact between the first line (for example in the linkage element 1a ), the contact area of the cylinder element 40 and the contact clips 33 manufactured.

Starting from the receiving element 30th a second line extends (for example, line 1b-3 in the linkage element 1b ) with an adjacent coupling element 20th (of the linkage element 1b ) is in communication.

The receiving element 30th is in the illustrated embodiment with a base body 36 formed, on the outer periphery of a cover 35 is attached by means of screws (not shown). Thus, the receiving element 30th essentially cylindrical.

The receiving element 30th includes two tilt sensors (inclinometers) 51 , 52 that put together an inclination measurement system 50 train to determine the spatial orientation of the linkage element.

A method for determining the borehole course can be carried out as follows, for example.

First, the drill rod is positioned and the position is recorded if necessary. The drilling process then begins, in which the drill head is inserted into the ground with a rotary movement of the drill rod. Using the orientation clamp 110 the offset angle of the linkage elements among each other is recorded: Whenever a magnet R1 is recognized, then the angle is displayed on the rotary encoder 103 queried.

The drilling process is carried out to the final depth. When the final depth is reached, the height of the flushing head is corrected by means of the distance sensor in order to obtain the drilling depth based on the subsurface.

Now the individual coupling elements 20th the inclinations of the linkage elements are determined with knowledge of the offset angle. In this way, the borehole course can be carried out with a measurement after the final depth has been reached.

Claims (22)

Drill rods (1) with several rod elements (1a-1c; 2; 3), a coupling element (20) being provided in the region of the interface between two rod elements (1a-1c; 2; 3), which Coupling element (20) has: a first connecting element (30) and a second connecting element (40) which can be rotated relative to one another, wherein the first connecting element (30) can be connected to a first rod element (1a-1c; 2; 3) of the drill rod (1) and the second connection element (40) can be connected to a second rod element (1a-1c; 2; 3) of the drill rod, wherein the coupling element (20) has an inclination measuring system (50), wherein one or more linkage elements (1a-1c; 2; 3) have a detection point, a magnet or a profile which can be detected by an orientation clamp (110). Drill rod (1) according to Claim 1 , characterized in that at least one contact element (33) is provided on the first connecting element (30), which contact element (33) rests against a section (42) of the second connecting element (40). Drill rod (1) according to Claim 1 or 2 , characterized in that the second connecting element (40) is introduced in sections into an opening region (31) of the first connecting element (30). Drill rod (1) according to one of the Claims 2 - 3 , characterized in that the at least one contact element (33) is a wire-shaped contact bracket, Drill rod (1) according to Claim 4 , wherein the contact clip has two connection ends (33a, 33b) and a contact area (33c) connecting them. Drill rod (1) according to one of the preceding claims, characterized in that the first connecting element (30) and / or the second connecting element (40) comprises a connection area for a line (1a-3, 1b-3, 1c-3), wherein the line (1a-3, 1b-3, 1c-3) establishes a connection to a further coupling element (20). Drill rod (1) according to one of the preceding claims, characterized in that the inclination measuring system (50) has a first inclination sensor (51) and a second inclination sensor (52), the inclination sensors (51, 52) being mounted on a circuit board. Drill rod (1) according to one of the preceding claims, characterized in that a first inclination sensor (51) of the inclination measuring system (50) is received in a recess, for example a circumferential groove, of a base body (36) of the first connecting element (30). Drill rod (1) according to one of the preceding claims, characterized in that the first connecting element (30) has a base body (36) and a cover (35) attached to its outer circumference. Drill rods (1) with several rod elements (1a-1c; 2; 3), a coupling element (20) being provided in the region of the interface between two rod elements (1a-1c; 2; 3), which Coupling element (20) has: a first connecting element (30) and a second connecting element (40) which can be rotated relative to one another, wherein the first connecting element (30) can be connected to a first rod element (1a-1c; 2; 3) of the drill rod (1) and the second connection element (40) can be connected to a second rod element (1a-1c; 2; 3) of the drill rod, wherein at least one contact element (33) is provided on the first connecting element (30), which contact element (33) rests against a section (42) of the second connecting element (40), wherein one or more linkage elements (1a-1c; 2; 3) have a detection point, a magnet or a profile which can be detected by an orientation clamp (110). Drill rod (1) according to Claim 10 wherein the at least one contact element (33) is a wire-shaped contact clip, the contact clip having two connection ends (33a, 33b) and a contact area (33c) connecting them. Drill rod (1) according to one of the preceding claims, characterized in that in each end region of a rod element (1a-1c) a coupling element (20) is provided, the coupling elements (20) being connected by means of a line (1a-3, 1b-3, 1c-3) for data and / or energy transmission. Drill rod (1) according to one of the preceding claims, characterized in that the coupling element or elements (20) is or are integrated into the drill rod (1). Mobile unit (100) with a drill rod (1) according to one of the preceding claims and a holding device (101) for the drill rod (1), which drill rod (1) has coupling elements (20) for connecting rod elements (1a-1c; 2; 3 ) of the drill rod (1), wherein several or all of the coupling elements (20) have an inclination measuring system (50), characterized in that the mobile unit (100) has an orientation clamp (110) to set an offset angle between rod elements (1a-1c; 2; 3) of the drill pipe (1) to be detected by detecting a detection point. Mobile unit (100) with a drill rod (1) according to Claim 13 , wherein the coupling elements (20) each comprise a contact element (33) in order to provide a contact for the transmission of electrical energy and / or data. Mobile unit (100) according to Claim 14 or 15th , characterized in that the mobile unit (100) has a distance sensor (104) for determining the drilling depth. Method for determining a borehole course, comprising the steps: Determining an offset angle between rod elements (1a-1c; 2; 3) of a drill rod (1), Determining the inclination of each linkage element (1a-1c), Determination of the borehole course on the basis of the offset angle, the length of each rod element (1a-1c; 2; 3) and the inclination of each rod element. Procedure according to Claim 17 , characterized in that the drilling depth is determined by means of a distance sensor (104). Procedure according to Claim 17 or 18th , characterized in that an offset angle between the rod elements is determined during drilling, and / or after the final depth has been reached, the inclination of each rod element is determined and the borehole course is determined. Method according to one of the Claims 17 - 19th , characterized in that a rotary encoder (103) determines a difference angle to the drill rod (1). Method according to one of the Claims 17 - 20th , characterized in that the borehole course is determined when or after reaching the final depth. Method according to one of the Claims 18 - 21 , characterized in that the determination of the offset angle during drilling takes place by means of an orientation clamp (110) in order to determine the relative rotation of the rod elements (1a-1c; 2; 3) with respect to one another.

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