EP4368809A1 - Dispositif de rinçage, notamment pour l'installation dans un train de tiges de forage - Google Patents

Dispositif de rinçage, notamment pour l'installation dans un train de tiges de forage Download PDF

Info

Publication number
EP4368809A1
EP4368809A1 EP22206595.5A EP22206595A EP4368809A1 EP 4368809 A1 EP4368809 A1 EP 4368809A1 EP 22206595 A EP22206595 A EP 22206595A EP 4368809 A1 EP4368809 A1 EP 4368809A1
Authority
EP
European Patent Office
Prior art keywords
flushing device
nozzle
recesses
base body
fluid flow
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.)
Pending
Application number
EP22206595.5A
Other languages
German (de)
English (en)
Inventor
Ernst Fengler
Rainer Hemken
Peter Rubarth
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LMR Drilling GmbH
Original Assignee
LMR Drilling GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by LMR Drilling GmbH filed Critical LMR Drilling GmbH
Priority to EP22206595.5A priority Critical patent/EP4368809A1/fr
Publication of EP4368809A1 publication Critical patent/EP4368809A1/fr
Pending legal-status Critical Current

Links

Images

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
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/08—Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure
    • 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
    • E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
    • E21B41/0078—Nozzles used in boreholes
    • 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
    • E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets
    • 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
    • E21B7/28—Enlarging drilled holes, e.g. by counterboring

Definitions

  • the invention relates to a flushing device, in particular for installation in a drill string which is designed to create boreholes in the ground, wherein the flushing device is intended for installation behind a drill bit of the drill string.
  • the invention further relates to a method for flushing ground.
  • pipes can be laid underground by digging trenches, laying the pipes in the trenches and, once the pipes are finished, filling the trenches with soil.
  • This earthwork is time-consuming, labor-intensive and therefore costly. Particular problems arise with this type of earthwork when pipes are to be laid beneath obstacles.
  • Horizontal drilling methods such as horizontal directional drilling, are known as trenchless installation methods, with which a pipeline can be laid without having to dig a trench.
  • a borehole can be initially drilled diagonally into the ground using a horizontal drilling device until the desired depth is reached in order to guide the pipeline safely beneath an obstacle.
  • a horizontal directional drilling system for example, a pilot hole is drilled in the direction of the target point using a drill head.
  • the drill head can be screwed to a drill rod and thus form the drill string.
  • the drill rod can have a smaller diameter than the drill head, so that an annular space is left between the drill rod and the soil.
  • a drilling fluid can be pumped through the rod to the drill head, where it exits and flushes the soil loosened by the drill head through the annular space.
  • the invention is based on the object of proposing a device with which the return flow of the drilling fluid through the annular space of the borehole can be improved. Furthermore, the device should contribute to the expansion of the borehole.
  • the flushing device in particular for installation in a drill string that is designed to create boreholes in the ground, wherein the flushing device is intended for installation behind a drill head of the drill string, it is essential to the invention that the flushing device has a tubular base body, that the flushing device has at least one nozzle body for dispensing at least one fluid, that the base body has recesses for receiving the at least one nozzle body, and that the at least one nozzle body is detachably connected to the base body.
  • the flushing device is intended for installation in a drill string, wherein the drill string can consist of a drill rod, which can be composed of several drill rods, and at least one drill head, which can be formed by a drill bit, for example.
  • the drill bit can be a pilot bit, in particular a roller bit, for example.
  • the flushing device is installed in the drill string at a distance from the drill head.
  • the distance between the flushing device and the drill head can be
  • the flushing device has a base body in which recesses are arranged, in each of which at least one nozzle body can be accommodated.
  • the base body has several recesses, with a nozzle body preferably being accommodated in each recess.
  • the nozzle bodies are each detachably accommodated in the recesses so that the nozzle bodies are exchangeable.
  • the nozzle bodies can be connected to the respective recess by screw connections.
  • the nozzle bodies each have at least one nozzle opening through which a fluid, in particular the drilling fluid solution, can be released into the annular space between the drill rod and the ground.
  • the fluid is guided through the tubular drill rods to the drill head and the flushing device.
  • a fluid-conducting pipeline is thus formed through the drill rod, at least in sections.
  • the flushing device has connectors arranged at the end on both sides for connection to the drill rod.
  • the connectors can have threads.
  • the nozzle openings are connected in a fluid-conducting manner to fluid openings in the recesses of the base body.
  • the fluid passes through the drill rod into the base body of the flushing device and through the fluid openings in the recesses of the base body to the nozzle openings of the nozzle bodies. If no nozzle body is accommodated in a recess, the respective fluid opening can be closed with a blind plug. A fixed beam angle is specified by the nozzle opening.
  • the fluid can thus be emitted through the nozzle bodies at a flatter or steeper angle to the longitudinal extension of the drill rod, in particular to its longitudinal axis of symmetry.
  • the fluid flow through the nozzle bodies can also be directed essentially in the direction of advance or against the advance direction of the drill string.
  • the advance direction is the direction in which the drill string is moved through the ground to create the borehole.
  • the soil loosened by a drill bit can be flushed out of the borehole through the annular space. This is possible in particular over a longer distance, in particular over 1,000 meters, thanks to the supporting nozzles, without the flushing flow coming to a standstill.
  • the nozzle bodies each have at least one nozzle opening and the jet angle of the fluid is predetermined by the nozzle bodies.
  • the nozzle bodies are detachably connected to the recesses in the base body.
  • the nozzle bodies are thus interchangeable, so that different nozzle bodies with different jet angles of the fluid in relation to the longitudinal extension of the drill string can be used.
  • the fluid can be jetted at a steep angle to the longitudinal extension of the base body so that the fluid flow is directed more in the direction of the surrounding soil, or the fluid can be guided at a shallow angle along the annular space.
  • the flushing device can thus be set up to expand the borehole and thus the annular space more, or the flushing device can be more geared towards flushing the flushing flow of the loosened earth material through the annular space.
  • the base body is rotationally symmetrical.
  • the base body of the flushing device can be rotationally symmetrical, for example, as a hollow cylinder, so that the recesses for receiving the nozzle bodies can be distributed along the circumference. This allows the fluid flow to be generated along the entire circumference of the base body in the annular space between the drill string and the ground.
  • the recesses are evenly distributed along the circumference of the base body.
  • the base body has an at least essentially cylindrical middle section, conically tapered areas adjoin the middle section on both sides and the recesses are arranged on both sides of the middle section in the conically tapered areas.
  • the middle section of the base body is essentially hollow-cylindrical.
  • the base body is constructed essentially mirror-symmetrically. Conically tapered areas adjoin the middle section on both sides, which reduce the diameter of the middle section to a smaller diameter.
  • the conically tapered areas form ring surfaces in which the recesses are arranged at least in sections.
  • the nozzle bodies can thus be accommodated by the base body on both sides of the middle section. This enables fluid flows in the direction of the advancement direction of the drill string and in the opposite direction.
  • the recesses are arranged in the tapered ring surfaces of the tapered regions and the recesses are laterally delimited by tapered side walls.
  • the recesses are arranged in the tapered regions in such a way that their longitudinal extension runs essentially parallel to the longitudinal extension of the base body.
  • the recesses are each delimited on two parallel sides by tapered side walls.
  • Tapered webs are formed between the side walls of two adjacent recesses, which form the ring surface.
  • the nozzle bodies accommodated in the recesses can in particular be accommodated flush in the recesses so that they are flush with the circumference of the central part.
  • the conical ring surfaces each have eight recesses.
  • the tapered areas on the sides of the central part can each have eight recesses, so that the base body has a total of 16 recesses for receiving nozzle bodies.
  • the middle part has a larger diameter than the other areas of the flushing device.
  • the other areas of the flushing device can be, for example, connecting pieces for the rods of the drill string, so that it can be installed in the drill string.
  • the diameter of the middle part is preferably smaller than the diameter of the hole created by the drill bit.
  • nozzle bodies with different angles of attack can be accommodated in the recesses. Because different nozzle bodies with different angles of attack of the nozzle openings can be accommodated in the recesses, the flushing device can be adapted to different purposes. For example, nozzle bodies with steep angles of attack can be used to enlarge a borehole, while nozzle bodies with flatter angles of attack can be used for the longitudinal extension of the base body to improve the return flow through the annular space.
  • the nozzle openings in a first ring surface are directed essentially in the direction of the advance direction of the drill string and the nozzle openings in a second ring surface are directed essentially against the advance direction of the drill string.
  • the nozzle openings of the nozzle bodies in a first conical region, as seen from the drill head, can be directed in the direction of the advance direction of the drill string, while those in a second conical region, as seen from the drill head.
  • the nozzle openings arranged in the conical area behind the central part can be directed against the direction of advance.
  • the nozzle bodies arranged in the second conical area thus support a fluid flow through the annular space in the direction of the starting point of the bore.
  • a further aspect of the invention relates to a method for flushing soil with a flushing device.
  • the flushing device according to the invention with nozzle bodies accommodated in the recesses of the base body can be used for flushing soil.
  • the flushing device when installed in a drill string with a drill bit, it can be used to support a fluid flow, in particular a flow of drilling fluid, in the direction of the inlet side of the drill string.
  • the flushing device therefore transports the sediment loosened by the drill bit in the direction of the inlet opening.
  • the flushing device can be used in a drill string to enlarge the diameter of the borehole, i.e. the annular space.
  • nozzles with a large beam angle to the longitudinal extent of the drill string can be selected.
  • the flushing device By enlarging the borehole, it is possible to adjust the pressure conditions in the annular space, in particular the annular space pressure can be reduced and the occurrence of blowouts can be minimized.
  • a drill hole can also be dammed or cemented by pumping in the appropriate fluids. This is particularly advantageous due to the modular design with interchangeable nozzle bodies, as the nozzle bodies can be easily cleaned or replaced.
  • the flushing device can also be used to cause artificial borehole collapses. By flushing with water, the filter cake on a borehole wall can be softened or dissolved, making the borehole unstable. For example, a high input of drilling fluid or water under high pressure can be used at certain points. The resulting unstable caverns then tend to collapse.
  • the flushing device makes it possible to flush obstacles when it is used as a single tool and not installed in a drill string. Obstacles that are at least partially located underground can be flushed out by means of a fluid flushing stream through nozzles that are set up, without having to come into direct contact with the obstacles.
  • a borehole is created by means of the method, wherein a substantially horizontal borehole is made in the ground by means of at least one drilling device having a drill rod and a drill bit, wherein a drilling fluid flow is generated by the drill bit, wherein the drilling device has the flushing device, wherein at least one fluid is passed through the nozzles of the flushing device and thus a fluid flow is generated, wherein a backflow of a drilling fluid flow in the annular space of the borehole is supported by the fluid flow passed through the nozzles.
  • the drilling device for creating the borehole has a flushing device according to the invention.
  • the method for creating a borehole can be a drilling fluid method.
  • the drilling fluid return flow can be stabilized by enlarging the borehole, so that bore lengths of more than 1,000 meters can be achieved.
  • the use of the flushing device optimizes the cleaning of the borehole, since the return flow of the drilling fluid flow is mainly generated by the flushing device and not by the flushing fluid emerging from the pilot bit.
  • the diameter of the borehole is increased by the fluid flow passed through the nozzles.
  • the borehole created can be significantly enlarged by the additional flushing flow introduced by the flushing device and by the angle of attack of the nozzles.
  • the borehole area flushed with the flushing device can be several times larger than the pilot drilling area.
  • the annular space pressure can be significantly reduced compared to conventional methods and thus the risk of blowouts can be minimized.
  • the fluid flow guided through the nozzles is guided both essentially in the direction of the drilling advance and essentially against the direction of the drilling advance.
  • an optimized return flow of the drilling fluid is achieved.
  • the fluid flow directed through the nozzles flushes away obstacles that are at least partially underground.
  • the fluid flow generated by the flushing device can flush away objects, for example obstacles that are at least partially underground.
  • the nozzles in position generate a flushing flow with a corresponding radial range that is able to flush away obstacles without coming into direct contact with them.
  • a flushing device 1 with a central part 2 and two connecting pieces 3 and 4 is shown in a perspective view.
  • the central part 2 of the flushing device 1 is essentially hollow-cylindrical. Conically tapered areas 5, 6 adjoin the central part 2. Recesses 7 are arranged in the conical areas 5, 6, which are designed to accommodate nozzle bodies 8.
  • the flushing device 1 can be installed in the pipe rod of a drill string 14 using the connecting pieces 3, 4.
  • the nozzle bodies 8 have nozzle openings 9, each of which has a fixed angle of attack to the longitudinal extension of the base body 10 of the flushing device 1.
  • a fluid flow can be generated through the nozzle openings 9, which is directed depending on the angle of attack of the nozzle openings 9.
  • the nozzle openings 9 are connected to the base body 10 via screw connections 11, so that the nozzle bodies 8 are exchangeable and thus nozzle bodies 8 with other angles of attack of the nozzle opening 9 can also be installed.
  • Fig.2 is a side view of the flushing device 1 according to Fig.1 Identical components are provided with the same reference numerals.
  • the conical regions 5, 6 can each, for example, span an angle of 160° with the longitudinal axis of symmetry of the base body 10.
  • the nozzle openings 9 of the nozzle bodies 8 of a first conical region 5 can be directed in the direction of the advance movement of the drilling passage, while the nozzle bodies in the conical region 6 generate a fluid flow opposite to the direction of movement.
  • the fluid flow through the nozzle bodies 8 of the first conical region 5 is thus directed in the direction of the drill head 15, the fluid flow of the nozzle bodies 8 in the conical region 6 is directed away from the drill head 15.
  • Fig.3 is a cross section of the flushing device 1 according to Fig.2 along the section A - A.
  • the recesses 7 are evenly distributed along the circumference of the base body 10.
  • Fig.4 is a longitudinal section at position B - B of the base body 10 according to Fig.2
  • the base body 10 has a continuous pipe 12 in its interior, through which a flushing fluid can be guided in the direction of the drill head 15.
  • the base body 10 has fluid openings 13 through which the fluid to be pumped can reach the nozzle bodies 8 and through the nozzle openings 9.
  • Fig.5 The installation of a flushing device 1 in a drill string 14 with a drill head 15 is shown schematically.
  • the flushing device 1 is arranged at a distance from the drill head 15, which can be designed as a drill bit, in order not to influence the function of the drill head 15, for example a control probe.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (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)
EP22206595.5A 2022-11-10 2022-11-10 Dispositif de rinçage, notamment pour l'installation dans un train de tiges de forage Pending EP4368809A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22206595.5A EP4368809A1 (fr) 2022-11-10 2022-11-10 Dispositif de rinçage, notamment pour l'installation dans un train de tiges de forage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22206595.5A EP4368809A1 (fr) 2022-11-10 2022-11-10 Dispositif de rinçage, notamment pour l'installation dans un train de tiges de forage

Publications (1)

Publication Number Publication Date
EP4368809A1 true EP4368809A1 (fr) 2024-05-15

Family

ID=84331157

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22206595.5A Pending EP4368809A1 (fr) 2022-11-10 2022-11-10 Dispositif de rinçage, notamment pour l'installation dans un train de tiges de forage

Country Status (1)

Country Link
EP (1) EP4368809A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4583603A (en) * 1984-08-08 1986-04-22 Compagnie Francaise Des Petroles Drill pipe joint
EP0494408A1 (fr) * 1990-12-24 1992-07-15 TERRA AG fuer Tiefbautechnik Procédé et appareil pour élargir un puits de forage
DE102015003157A1 (de) * 2015-03-15 2016-09-15 Herrenknecht Ag Bohrstrangelement

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4583603A (en) * 1984-08-08 1986-04-22 Compagnie Francaise Des Petroles Drill pipe joint
EP0494408A1 (fr) * 1990-12-24 1992-07-15 TERRA AG fuer Tiefbautechnik Procédé et appareil pour élargir un puits de forage
DE102015003157A1 (de) * 2015-03-15 2016-09-15 Herrenknecht Ag Bohrstrangelement

Similar Documents

Publication Publication Date Title
DE3035876C2 (fr)
EP3303753A1 (fr) Système et procédé de pose près de la surface de câbles souterrains ou de conduites souterraines dans le sol
DE102013111350A1 (de) Aufweitwerkzeug und Vorrichtung zum Aufweiten einer im Erdreich vorhandenen Durchgangsöffnung
EP2505762A2 (fr) Dispositif de forage et procédé de forage horizontal
DE3718480C2 (de) Bohrvorrichtung für ein Hochdruck-Injektions-Bohrverfahren und Bohrverfahren unter Verwendung der Bohrvorrichtung
EP2900895B1 (fr) Dispositif et procédé de pose d'une canalisation dans un trou de forage
EP2085567A1 (fr) Procédé de déplacement sans tranchée de tuyaux
EP1002932B1 (fr) Procédé et dispositif pour le remplacement de conduites sans excavation
EP4368809A1 (fr) Dispositif de rinçage, notamment pour l'installation dans un train de tiges de forage
DE20306797U1 (de) Hohlbohrkrone für Kernbohrmaschinen
EP3112580B1 (fr) Procédé et dispositif pour la formation d'une canalisation souterraine
DE102015107194A1 (de) Bohranlage zum Erzeugen oder Aufweiten einer Erdbohrung im Erdreich und Verfahren zur Steuerung eines Vorschubantriebs einer solchen Bohranlage
DE10319800A1 (de) Hohlbohrkrone für Kernbohrmaschinen
DE10257392B4 (de) Kanalbohrverfahren und -vorrichtung
EP2927377B1 (fr) Procédé et agencement de nettoyage d'un élément de fondation en béton
DE102007015088B4 (de) Verfahren zum mehrstufigen Herstellen einer Erdbohrung und Vorrichtung zur Durchführung des Verfahrens
EP3387208B1 (fr) Procédé et dispositif de pose sans tranchée d'un câble ou d'un tuyau dans un sol
EP4099525B1 (fr) Dispositif et procédé d'introduction d'un dispositif supplementaire souterrain dans le sol
DE102022209518A1 (de) Bohr- oder Reinigungsgerät und Verfahren zu dessen Verwendung
DE202023101975U1 (de) Hochdruckinjektionsvorrichtung
EP3530871A1 (fr) Dispositif de production ou d'élargissement d'un forage de sol
EP4144952A1 (fr) Procédé de forage horizontal et système de forage horizontal
EP3940192A1 (fr) Procédé de préparation ou de production un forage dans un sol
DE102020127156A1 (de) Vorrichtung zum Bohren einer horizontalen Bohrung
EP3663504A1 (fr) Procédé de terrassement, dispositif de terrassement et installation de terrassement

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20240410

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20240820