EP2150674A2 - Verfahren und vorrichtung zur überprüfung der umhüllung einer rohrleitung während des einzugs in ein mit flüssigkeit gefülltes bohrloch - Google Patents
Verfahren und vorrichtung zur überprüfung der umhüllung einer rohrleitung während des einzugs in ein mit flüssigkeit gefülltes bohrlochInfo
- Publication number
- EP2150674A2 EP2150674A2 EP08773356A EP08773356A EP2150674A2 EP 2150674 A2 EP2150674 A2 EP 2150674A2 EP 08773356 A EP08773356 A EP 08773356A EP 08773356 A EP08773356 A EP 08773356A EP 2150674 A2 EP2150674 A2 EP 2150674A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- pipeline
- pulling head
- pipe
- electrically non
- borehole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000007788 liquid Substances 0.000 title claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 30
- 239000010959 steel Substances 0.000 claims description 30
- 238000005553 drilling Methods 0.000 claims description 19
- 239000012811 non-conductive material Substances 0.000 claims description 14
- 239000004033 plastic Substances 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- 238000012795 verification Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011268 retreatment Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/046—Directional drilling horizontal drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
- E21B7/205—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes without earth removal
Definitions
- the present invention relates to a method and a device which can be used for checking the corrosion protection envelope of a steel pipeline while it is being drawn into a fluid-filled borehole.
- HDD Horizontal Directional Drilling
- this protective covering may be damaged, if e.g. Sharp-edged stones or other obstacles destroy them by pressure or shear. If such a damage has taken place, the pipeline can be adequately protected against corrosion by additional measures (keyword: active corrosion protection) if the damage is not too great. In case of major damage, however, the pipeline must be removed again from the borehole to repair the damaged areas. However, this retreatment of the pipe usually succeeds only if it takes place immediately after the pulling-in process, since otherwise the pipeline settles in the ground and can no longer be moved. In any case, such emergency measures are associated with considerable costs.
- such measurements are made by exposing and cleaning the tubing at both ends so that the tubing does not have an electrically conductive connection to the bottom (e.g., via the drilling fluid).
- To determine the polarizability of the negative pole of a DC voltage source is then connected to the pipe to be tested and the positive pole to a makeshift earth electrode. By switching the current on and off at certain time intervals as well as measuring the associated switch-on and switch-off potentials, it is possible to conclude the condition of the tube envelope.
- the object of the present invention is to enable such measurements already during the laying process, in order to be able to interrupt the drawing process promptly in the event of damage to the casing and to withdraw the pipe from the borehole again.
- This retraction process can be carried out at an earlier time than before, the economic consequences of such a disaster are mitigated and the technical risk that the pipeline may not be able to salvage due to a sedimentation, is reduced.
- the object of the invention is achieved in that the tensile force of a drilling rig is transmitted via a drill pipe and a non-conductive portion having a pulling head on a pipe and during the Einziehvorgangs the integrity of the surrounding in the borehole of a liquid sheath of the pipe from a Measuring apparatus is checked. In this way, it is easy to make the review while retracting.
- the measuring apparatus is located outside of the borehole and / or that the measuring device is arranged mobile and / or is moved during the collection of the pipeline substantially simultaneously with the pipeline.
- a further teaching of the invention provides that the pipeline is stored outside the borehole on roller blocks, and / or that one end of the Pipeline electrically separated from the ground and / or the fluid-filled hole.
- Another teaching of the invention provides that the tensile force of the drilling rig is transmitted via a shaft located in the pulling head, preferably made of steel, on a body, preferably made of steel, which is located in an electrically non-conductive portion within the pulling head and the introduced Traction over the electrically non-conductive portion transmits to a related to the pipeline bearing plate of the pulling head, whereby the pipe connected to the pulling head is subjected to the tensile force required for the pulling operation.
- the electrically non-conductive portion contains an electrically non-conductive material, preferably concrete and / or plastic, with which the tensile force of the drilling device is transmitted to the pipeline.
- an electrically non-conductive material preferably concrete and / or plastic, with which the tensile force of the drilling device is transmitted to the pipeline.
- the object of the invention is achieved by a pulling head for transmitting a pulling force for pulling a pipeline into a hole filled with a liquid from a pulling device on the pipeline, on one side a connection with a drill pipe of a drilling rig for introducing a tensile force for drawing in the pipeline and on the opposite side has a connection possibility with the pipeline to be recovered, and wherein the pulling head has an electrically non-conductive portion which isolates both connection possibilities from each other.
- the electrically non-conductive portion consists of an electrically non-conductive material
- the electrically non-conductive material is pressure-resistant and / or tensile strength
- the electrically non-conductive material concrete and / or a plastic is.
- an advantageous embodiment of the invention provides that the electrically non-conductive portion is protected in the pulling direction by a cover against mechanical damage, wherein preferably the cover has no electrically conductive contact to the pulling head and / or to the pipeline.
- a further teaching of the invention provides that the drawing head has a body connected to a shaft, preferably made of steel, preferably made of steel, and a bearing plate and that the electrically non-conductive portion of the body and the bearing plate when introduced via the shaft in such an operative connection causes the body to exert a pressure on the bearing plate and / or that the pulling head has a body connected to a shaft, preferably made of steel, preferably steel, and a rear bearing plate, and that the electrically non-conductive portion is the body and the rear bearing plate brings in pressure introduction via the pipe in an operative connection in such a way that the rear bearing plate exerts a pressure on the body.
- the technical object is achieved by a device for checking a casing of a pipeline during a collection in a liquid-filled wellbore in which a previously described drawing head is provided, which transmits the pulling force of a drilling rig via a drill pipe to a pipeline and a measuring apparatus is provided which checks, during the drawing process, the integrity of the tubing casing surrounded by a liquid, the measuring device preferably being located outside the borehole.
- FIG. 1 shows a schematic representation of the method according to the invention
- Fig. 2a Basic embodiment of the invention
- Fig. 3 Exemplary embodiment of the invention
- Fig. 4 Exemplary embodiment of the invention
- Fig. 1 the principle use of the method according to the invention and an apparatus thereby usable is shown.
- a liquid well 7 filled hole 6 is first created according to the usual in the horizontal drilling techniques steps (pilot hole, expansion holes).
- the drill string 13 is connected via a reamer 14, various fasteners 15 and the pulling head 2 with the pipe 3.
- the pipeline 3 is mounted on roller blocks 19 outside the borehole.
- the end of the pipe 3 is in air and is thereby electrically separated from the bottom 16 and the well 6 filled with liquid 7.
- a measuring device 5 at the end of the pipeline 3.
- this measuring device 5 is mobile and moves during the Einziehvorgangs substantially simultaneously with the pipe.
- the measuring device 5 is connected to an earth electrode 20 and the pipeline 3. Between the earth electrode 20 and the pipe 3 is a electrical measurement performed. For this purpose, a voltage source (not shown) is provided. If the sheathing 4 of the pipeline 3 is damaged, then this can be detected by the electrical measured values.
- FIG. 2a and Fig. 3 the basic structure of a device according to the invention is shown.
- the tensile force of the drilling rig 1 is transmitted via the drill pipe 13 via a reamer 14 and various connecting elements 15 on a steel shaft 8.
- a steel body 9 At the end of this steel shaft 8 is a steel body 9.
- the steel shaft 8 is partially and the steel body 9 completely surrounded by a pressure-resistant, electrically non-conductive material 10.
- Fig. 2b to Fig. 2g show sectional views through the pulling head 2 and its internal structure.
- the front in the pulling direction of the pulling head 2 is protected in a preferred embodiment by a cover 12 against mechanical damage.
- Steel shaft 8, steel body 9 and cover 12 are connected via the pressure-resistant, electrically non-conductive material 10.
- the applied by the drilling rig 1 tensile force (see Fig. 4) is transmitted via the steel shaft 8 and the steel body 9 and the pressure-resistant, electrically non-conductive material 10 on a bearing plate 11.
- This bearing plate 11 is connected directly to the outer jacket of the pulling head 2 and, in turn, to the pipeline 3.
- the relevant surfaces are shown for power transmission.
- a pipe with an outer diameter of 600 mm is chosen as an example.
- the maximum assumed laying force when using the horizontal drilling technique is assumed to be approx. 2,500 kN. This value is already a special case, because the normal pull-in forces are usually only about 500 - 1,500 kN for very long holes for the considered pipe diameter.
- the area available for the transmission of the forces introduced results from the sectional area of steel body 9 and bearing plate 11. In the example, this area is 141,573 mm 2 .
- the pressure-resistant, electrically non-conductive material 10 has a compressive strength of, for example, 45 N / mm 2 (eg concrete C45 / 55), this results in a maximum possible power transmission of 6,371 kN and thus a multiple of the required 25 force of 2,500 kN.
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
- Basic Packing Technique (AREA)
- Pipeline Systems (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007025917A DE102007025917B4 (de) | 2007-06-02 | 2007-06-02 | Verfahren und Vorrichtung zur Überprüfung der Umhüllung einer Rohrleitung während des Einzugs in ein mit Flüssigkeit gefülltes Bohrloch |
PCT/EP2008/004390 WO2008148514A2 (de) | 2007-06-02 | 2008-06-02 | Verfahren und vorrichtung zur überprüfung der umhüllung einer rohrleitung während des einzugs in ein mit flüssigkeit gefülltes bohrloch |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2150674A2 true EP2150674A2 (de) | 2010-02-10 |
EP2150674B1 EP2150674B1 (de) | 2011-03-30 |
Family
ID=39929129
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08773356A Active EP2150674B1 (de) | 2007-06-02 | 2008-06-02 | Verfahren und vorrichtung zur überprüfung der umhüllung einer rohrleitung während des einzugs in ein mit flüssigkeit gefülltes bohrloch |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2150674B1 (de) |
AT (1) | ATE503909T1 (de) |
DE (2) | DE102007025917B4 (de) |
WO (1) | WO2008148514A2 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014005567A1 (de) * | 2014-04-16 | 2015-10-22 | Rhône Trade and Consulting SA | Verfahren zum grabenlosen Verlegen einer Rohrleitung |
CN112901079A (zh) * | 2021-02-02 | 2021-06-04 | 陕西中科非开挖技术股份有限公司 | 一种管道回拖连接用保护装置 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4319648A (en) * | 1979-09-24 | 1982-03-16 | Reading & Bates Construction Co. | Process for drilling underground arcuate paths and installing production casings, conduits, or flow pipes therein |
EP0059804A1 (de) * | 1981-03-05 | 1982-09-15 | Panhandle Eastern Pipe Line Company | Verfahren und Vorrichtung zur Erfassung von Erdschlüssen in Rohrleitungen mit kathodischem Korrosionsschutz |
DE3808322C1 (en) * | 1988-03-12 | 1989-09-21 | Buderus Bau- Und Abwassertechnik Gmbh, 6330 Wetzlar, De | Method for testing the external corrosion protection of single-pipe lines which are laid in the ground and consist of ductile cast iron, and application of said method |
DE3818998C3 (de) * | 1988-06-03 | 2003-02-27 | Tracto Technik | Verfahren zum Verlegen von Versorgungsleitungen |
IT1230366B (it) * | 1989-08-01 | 1991-10-18 | Eniricerche Spa | Procedimento per il controllo in continuo dell'integrita' del rivestimento protettivo di strutture metalliche interrate e dispositivi per la sua realizzazione. |
US5331286A (en) * | 1989-08-01 | 1994-07-19 | Eniricerche S.P.A. | Method for continuously monitoring the soundness of the protective covering on underground metal structures, and devices for its implementation |
WO2005031109A1 (en) * | 2003-09-30 | 2005-04-07 | Drag'n Skin International Inc. | A pipe assembly and a method for installation in a borehole |
DE202005020808U1 (de) * | 2005-03-23 | 2006-08-24 | Abb Patent Gmbh | Magnetisch-induktiver Durchflussmesser mit elektrisch isoliertem Messrohr |
DE102005036508B4 (de) * | 2005-07-29 | 2007-07-12 | Eupec Pipecoatings Gmbh | Verfahren und Vorrichtung zur Überwachung und Detektierung von Beschichtungsdefekten einer erd- oder wasserverlegten Rohrleitung |
GB0516353D0 (en) * | 2005-08-09 | 2005-09-14 | Tuscan Corrosion Control Ltd | Pipe coating evaluation apparatus and method |
-
2007
- 2007-06-02 DE DE102007025917A patent/DE102007025917B4/de active Active
-
2008
- 2008-06-02 DE DE502008003015T patent/DE502008003015D1/de active Active
- 2008-06-02 WO PCT/EP2008/004390 patent/WO2008148514A2/de active Application Filing
- 2008-06-02 AT AT08773356T patent/ATE503909T1/de active
- 2008-06-02 EP EP08773356A patent/EP2150674B1/de active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2008148514A3 * |
Also Published As
Publication number | Publication date |
---|---|
DE102007025917B4 (de) | 2009-11-12 |
WO2008148514A3 (de) | 2009-02-19 |
DE102007025917A1 (de) | 2008-12-24 |
WO2008148514A2 (de) | 2008-12-11 |
EP2150674B1 (de) | 2011-03-30 |
DE502008003015D1 (de) | 2011-05-12 |
ATE503909T1 (de) | 2011-04-15 |
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