DE102011101570A1 - Pipe guide device for use as e.g. pipe slider for guiding product pipe inserted into substrate, has auxiliary frame attached to main frame and rotatable around axis in relation to main frame, and guide elements for engaging and guiding pipe - Google Patents

Abstract

The device e.g. support (22), has a main frame (29) e.g. steel frame, for holding components of the device, and guide elements (31, 32) for engaging and guiding a pipe and defining a passage opening (301). The passage opening has an axial axis, which corresponds to an axial direction of the pipe. The guide elements are attached to an auxiliary frame (30) that is attached to the main frame. The auxiliary frame is rotatable around the axial axis in relation to the main frame. The guide elements are designed as supporting elements e.g. roller, for supporting the pipe. One of the guide elements is designed as a thrust element e.g. endless conveying element such as a track or a profiled rubber strip.

Description

The present invention relates to a method and thereby usable devices for laying pipelines.

State of the art

In the past, numerous methods and devices have been developed to lay pipelines in wellbores, thus traversing sensitive areas on the terrain surface for which laying in the open trench was not possible or advisable for technical, environmental, legal or economic reasons. Such a trenchless installation can z. B. where the surface in the laying area with heavy construction machinery can not be used (eg Moore, waters) or where from an ecological point of view, no planning permission can be granted (eg in nature reserves) or where the use of conventional laying techniques would be too expensive (eg for large laying depths and high groundwater level).

The literature provides comprehensive information on the already used and proven installation methods. Here, a classification of the methods on the basis of controllability (controlled / uncontrolled procedure), the soil treatment (soil displacement / soil removal), the cuttings transport (mechanical, hydraulic) and the number of steps (pilot hole, expansion hole, retraction or insertion process) has proven , Further distinguishing features are z. B. the basic geometric design of the drilling axis (straight, curved) and to be laid by means of the respective method pipe materials (eg., Concrete, PE, cast iron, steel, etc.).

With regard to the method according to the invention, the state of the art is best represented by the so-called "direct pipe" method ("DP method"), as is the case in principle in the patent application DE 10 2006 020 339.9 is disclosed.

The DP process has since been used successfully in practice worldwide. With this single-phase installation method, steel pipelines with a length of up to 1,500 m and a pipe diameter of between about 800 mm and 1,400 mm can be installed.

To be regarded as particularly advantageous in the DP process is that it is a one-step process, in which the working steps pilot drilling, expansion bore and laying process are carried out in one step. Furthermore, it is very favorable that in the DP process only a larger work surface at the starting point for the drilling device and the pipe construction is required. At the destination point, only a very small work surface is needed to disassemble the drill head.

However, the DP method also has disadvantages or limitations. In particular, the achievable laying lengths for technical reasons (supply of the drill head with hydraulic energy of overground etc.) for smaller pipe diameters are very limited (about 80-250 m). Furthermore, the measurement and the operation of the control and drilling device are relatively complicated. This high level of complexity in the DP process also requires high investment in machine equipment.

Technical task

The present invention has for its object to provide a method and thereby deployable devices, with the help of smaller pipelines (about 100 mm to 600 mm diameter) over long lengths in a single step and with only a larger work surface at the starting point are laid economically and environmentally friendly can.

Solution of the technical task

The technical problem is solved by the pipe to be laid firmly connected to an (angled) Bohrgarnitur and then pressed by a drilling device in the ground, wherein the drive of the drill head via a driven by the pumped through the interior of the pipeline drilling fluid drilling motor takes place and the bottom of the drilling fluid released from the drilling fluid is discharged through the annulus from the wellbore. The control of the drill set and thus the curve is achieved by turning the pipe (and thus the drill set) by means of the drilling device.

Differentiation from existing procedures

The combination of features described above is not met by any of the existing methods of trenchless piping in wellbores. This applies both to the Direct Pipe method discussed in more detail here and to the known HDD method (HDD = Horizontal Directional Drilling).

Compared with the DP method, the method according to the invention is distinguished, inter alia, by the fact that the structure, control and energy supply of the drill set are considerably simpler. The DP process essentially uses the known from microtunnelling or the controlled pipe jacking drills, where the Drive the drill head via hydraulic motors and control the drill head via hydraulic cylinders. These components are relatively sensitive and complicated in the controller. In addition, they must be connected to a suitable hydraulic circuit (pressure-volume requirements), ie either the hydraulic unit is located directly in the drill string (large diameter of the pipeline required, at least 800 mm) or it is made by appropriate hose connections from above supplied (length limitation to approx. 80-250 m). Both variants are susceptible to interference and complicated in construction and operation, whereas the inventive use of the proven wellbore motors and the power supply on the pumped drilling fluid represent a very significant simplification.

Compared with the DP method (as well as the HDD method), the method according to the invention is further distinguished by the rotatable mounting of the pipeline on the terrain surface, whereby the pipeline can be used not only for power transmission for the drilling operation but also for controlling the drill set.

Another important distinguishing feature compared to the DP method is that with the method according to the invention diameter-length combinations can be laid which can not be covered by the DP method (small pipe diameters, large bore lengths).

Thus, the method according to the invention differs from the DP technology, in particular with regard to laying lengths and pipe diameters, as well as the control of the drilling set.

Advantages of the invention

• • Umweltverträglichkeit (geringer Platzbedarf, nur eine Arbeitsfläche).
• • Schnelligkeit (nur ein Arbeitsgang).
• • Wirtschaftlichkeit (geringe Investitionen in Maschinen und Ausrüstungen).
• • Sicherheit (permanente Bohrlochstützung).
• • Robustheit (Nutzung bewährter und einfach aufgebauter Einzelkomponenten).

The basic advantages of the invention are:

• • Environmental compatibility (low space requirement, only one working surface).
• • Speed (only one operation).
• • Economy (low investment in machinery and equipment).
• • Safety (permanent well support).
• • Robustness (use of proven and simply constructed individual components).

drawings

The method according to the invention and devices which can be used in the process are illustrated with reference to drawings and explained below, wherein the features shown there have exemplary character. The drawings show:

1 : Exemplary representation of the method according to the invention with essential devices.

2 : Exemplary representation of the method according to the invention with a rotating device at the pipe end.

3 : Exemplary representation of the drill set for small pipes (up to approx. 300 mm diameter).

4 : Exemplary representation of the drill set for larger pipes (larger approx. 300 mm diameter).

5 : Exemplary representation of a roller block according to the invention.

In 1 are shown by way of example the essential elements of the method according to the invention with its essential mechanical devices. One will be on the terrain surface 19 prepared pipeline 10 from a drilling device 13 along a planned drilling line 4 from an entry point 2 to an exit point 3 pushed. The along the drilling line 4 upcoming ground 16 is from a drill head 6 solved. The drill head 6 is doing by a drill motor 7 powered by his energy from a flowing drilling fluid 17 receives. This drilling fluid 17 is from a pump 27 through a hose 28 , a rotary union 12 , a cable conduit 11 , the pipeline 10 and a measuring tube 9 and an elbow 8th pumped. The in the measuring tube 9 arranged measuring probe 21 transmits the position data via a inside the pipeline 10 running cable 25 to the helm 26 at the terrain surface 19 , The from the drill head 6 dissolved soil 16 is from the at the drill head 6 in the borehole 1 entering drilling fluid 17 through the annulus 18 to the entry point 2 transported. The necessary for the drilling process feed forces are from the drilling device 13 generated and over in the drilling device 13 arranged feed unit 14 on the pipeline 10 transfer. For controlling the drill head 6 along the drilling line 4 It is necessary, the working direction of the drill head 6 to change. This is done by small rotational movements of the pipeline 10 , performed by the rotary device 15 within the drilling device 13 , The rotational movements of the pipeline 10 Be aware of the tightness with the pipeline 10 connected drill string 5 transferred, in which the elbow 8th is arranged. At the end of the pipeline is the cable tube 11 attached, from which the cable from the pipeline 10 is led out without the drilling fluid leaking. The connection between pipeline 10 and hose 28 via the rotary feedthrough 12 ,

In 2 is in principle once again the structure of the method according to the invention (analog 1 ) shown with its essential mechanical equipment. As a further advantageous embodiment, however, a two-part embodiment of the drilling device is here 13 shown, wherein the feed unit 14 again near the entry point 2 is built while the turning device 15 at the end of the pipeline 10 (between cable tube 11 and rotary feedthrough 12 ) is installed. While a part of the drilling device 13 with the feed device 14 is stationary, moves the other part of the drilling device 13 with the turning device 15 during drilling and laying work with the pipeline 10 , This separation allows the simultaneous transmission of feed forces and torques to the pipeline 10 be implemented structurally particularly simple.

In 3 For example, a drill set for smaller pipes (up to approx. 300 mm diameter) is shown. At the front end of the drill set 5 is the drill head 6 which is the one along the drill line 4 upcoming ground 16 essentially mechanically released, supported by the drill head 6 emerging drilling fluid 17 , This drilling fluid 17 takes the dissolved soil 16 and transports him through the annulus 18 through the borehole 1 , The drill head 6 is from the drill motor 7 powered by its energy from the drilling fluid flowing through it 17 extracts. The drill motor 7 is fixed to the elbow 8th connected. This elbow 8th indicates, depending on the Bohr radius of the intended drilling line 4 an angulation of about 0.5 ° to 2.5 °. By turning the drill set 5 (and thus the elbow 8th ) becomes the working direction of the drill head 6 changed and thus the curve of the Bohrgarnitur 5 allows. Behind the elbow 8th the measuring tube closes 9 on, in which the measuring probe 21 located. At the measuring probe 21 In a preferred embodiment, this is a device known from the HDD (HDD = Horizontal Directional Drilling) method and the deep hole drilling technique for oil and gas for determining the respective position of the drill set 5 in the ground 16 , The measurement method of this measuring probe can be used as a reference both the magnetic field and the gravitational field of the earth, but it can also be based on the measuring principle of a gyrocompass. It is also possible that this measuring probe is based on the transmitter-receiver principle, as it is also known from the HDD industry.

In 4 is a drill set 5 for larger pipelines (larger approx. 300 mm diameter). In this case, the torques of commercially available drilling motors are sufficient 7 for driving the drill head 6 sometimes not (eg when drilling in rock), so that between drilling motor 7 and drill head 6 a gearbox 23 is provided, which is the speed of the drill motor 7 reduces and at the same time that for the drive of the drill head 6 available torque increased. The gear 23 is via a transmission mount 24 with the elbow 8th connected to the resulting torques in the gearbox 23 be able to catch. in a preferred embodiment, the measuring probe 21 in the gearbox mount 24 integrated, whereby the spatial distance to the drill head 6 reduces and the accuracy of the positioning of the drill head 6 is increased. The supply of drilling fluid 17 to the drill motor 7 takes place via a feed line 20 , which are inside the pipeline 10 runs. The transmission of the measuring data of the measuring probe 21 takes place analogously to the corresponding description 3 ,

The measuring data of the measuring probe 21 in turn, via a cable connection 25 be transmitted.

In is an example of an embodiment of a roller block 22 shown, both axial movements of the pipeline 10 as well as rotational movements of the pipeline 10 allows. The pipeline 10 is doing roles 32 stored, which are about roll holders 31 on the roller block turned part 30 support. This roller block turned part 30 is rotatable Within the roller frame 29 stored. The roles 32 thus allow the translational movement of the pipeline 10 through the roller block 22 while the roller block turning part 30 a rotation of the pipeline 10 allows.

LIST OF REFERENCE NUMBERS

1

well

2

entry point

3

exit point

4

drilling line

5

bottom hole assembly

6

wellhead

7

drill motor

8th

elbow

9

measuring tube

10

pipeline

11

conduit

12

Rotary union

13

drilling

14

feeder

15

rotator

16

ground

17

drilling fluid

18

annulus

19

ground surface

20

feeder

21

probe

22

Rollenbock

23

transmission

24

transmission mount

25

electric wire

26

helm

27

pump

28

tube

29

Rollenbock frame

30

Roller block rotating part

31

roll holder

32

roll

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102006020339 [0004]

Claims (10)

Method for laying a pipeline in a borehole, characterized in that - the borehole ( 1 ) an entry point ( 2 ) and an exit point ( 3 ) and between these two points along a drill line ( 4 ) through the ground ( 16 ), - the pipeline ( 10 ) before starting the laying in one piece on the terrain surface ( 19 ) and fixed at its front end with a rigid drilling set ( 5 ) consisting at least of measuring tube ( 9 ), Elbow ( 8th ), Drill motor ( 7 ) and drill head ( 6 ), - the borehole ( 1 ) from the drill set ( 5 ) along the planned drilling line ( 4 ) by: • the feed force for the drilling operation of a feed device ( 14 ) a drilling device ( 13 ) and via the pipeline ( 10 ) on the drill set ( 5 ) with the drill head ( 6 ), the control of the drilling process is carried out by a rotating device ( 15 ) of the drilling device ( 13 ) the pipeline ( 10 ) and the Bohrgarnitur ( 5 ) with the contra-angle handpiece ( 8th ) and thus the working direction of the drill head ( 6 ), • the drill head ( 6 ) from the drill motor ( 7 ), wherein the drilling motor ( 7 ) its drive energy from one through the pipeline ( 10 ), the measuring tube ( 9 ) and the angle piece ( 8th ) supplied drilling fluid ( 17 ) along the drill line ( 4 ) pending ground ( 16 ) from the drill head ( 6 ) and from the at the drill head ( 6 ) exiting drilling fluid ( 17 ) via an annulus ( 18 ) from the borehole ( 1 ), whereby the drilling fluid ( 17 ) through the pipeline ( 10 ), the measuring tube ( 9 ), the elbow ( 8th ) and the drill motor ( 7 ) to the drill head ( 6 ), - the pipeline ( 10 ) simultaneously with the creation of the borehole ( 1 ) in the borehole ( 1 ) by placing the pipeline ( 10 ) directly to the drill set ( 5 ) through the borehole ( 1 ), until the front end of the pipeline ( 10 ) the exit point ( 3 ) of the borehole ( 1 ) and the pipeline ( 10 ) from the entry point ( 2 ) of the borehole ( 1 ) along the drill line ( 4 ) to the exit point ( 3 ) of the borehole ( 1 ) runs. Method according to claim 1, characterized in that the drilling fluid ( 17 ) through an inside of the pipeline ( 10 ) running, separate feed line ( 20 ) the drill motor ( 7 ) is supplied. Method according to claims 1 and 2, characterized in that between the drill head ( 6 ) and drilling motor ( 7 ) a gearbox ( 23 ) is mounted, which via a transmission mount ( 24 ) firmly with the contra-angle handpiece ( 8th ) connected is. Method according to Claims 1 to 3, characterized in that the measuring probe ( 21 ) the measurement data on an inside of the pipeline ( 10 ) running cable ( 25 ) to the steering position ( 26 ) on the terrain surface ( 19 ) transmits. Method according to Claims 1 to 3, characterized in that the measuring probe ( 21 ) the measured data wirelessly to the control station ( 26 ) on the terrain surface ( 19 ) transmits. Method according to claims 1 to 5, characterized in that the pipeline ( 10 ) consists of at least two individual pieces, wherein the first section at the start of drilling to the drill set ( 5 ) is grown and after this length has been drilled, the second section is attached to the first section before the drilling process is continued. Apparatus according to claim 1 to 6, characterized in that the feed device ( 14 ) and the rotary device ( 15 ) so in the drilling device ( 13 ) are mounted that axial movement and rotation of the pipeline ( 10 ) can be executed simultaneously. Apparatus according to claim 1 to 7, characterized in that the drilling device ( 13 ) is made in two parts, wherein the feed device ( 14 ) near the entry point ( 2 ) and the rotary device ( 15 ) at the end of the pipeline ( 10 ) is installed. Apparatus according to claim 1 to 8, characterized in that the measuring probe ( 21 ) within the gearbox mount ( 24 ) and outside the drill motor ( 7 ) is attached. Apparatus according to claim 1 to 9, characterized in that the pipeline ( 10 ) on the terrain surface ( 19 ) so on roller blocks ( 22 ), that axial movement and rotation of the pipeline ( 10 ) in roller block ( 22 ) can be executed simultaneously.

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