EP0956424B1 - Verfahren und vorrichtung zum niederbringen von bohrlöchern in den meeresboden durch anwendung eines gegenspülverfahrens - Google Patents
Verfahren und vorrichtung zum niederbringen von bohrlöchern in den meeresboden durch anwendung eines gegenspülverfahrens Download PDFInfo
- Publication number
- EP0956424B1 EP0956424B1 EP97951814A EP97951814A EP0956424B1 EP 0956424 B1 EP0956424 B1 EP 0956424B1 EP 97951814 A EP97951814 A EP 97951814A EP 97951814 A EP97951814 A EP 97951814A EP 0956424 B1 EP0956424 B1 EP 0956424B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drill string
- platform
- string portion
- drilling head
- drilling
- 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.)
- Expired - Lifetime
Links
- 238000005553 drilling Methods 0.000 title claims description 30
- 238000000034 method Methods 0.000 title claims description 21
- 238000000605 extraction Methods 0.000 title claims description 7
- 238000007667 floating Methods 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims 1
- 238000007664 blowing Methods 0.000 claims 1
- 239000000969 carrier Substances 0.000 claims 1
- 238000004891 communication Methods 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 claims 1
- 238000005096 rolling process Methods 0.000 claims 1
- 239000013049 sediment Substances 0.000 description 7
- 238000003860 storage Methods 0.000 description 7
- 239000010432 diamond Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000013505 freshwater Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000011001 backwashing Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 230000001141 propulsive effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/08—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods
- E21B19/09—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods specially adapted for drilling underwater formations from a floating support using heave compensators supporting the drill string
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/07—Telescoping joints for varying drill string lengths; Shock absorbers
-
- 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
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/08—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods
-
- 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
- E21B21/001—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor specially adapted for underwater 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/14—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using liquids and gases, e.g. foams
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/29—Obtaining a slurry of minerals, e.g. by using nozzles
-
- 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
- E21B7/12—Underwater drilling
- E21B7/124—Underwater drilling with underwater tool drive prime mover, e.g. portable drilling rigs for use on underwater floors
-
- 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
- E21B7/12—Underwater drilling
- E21B7/128—Underwater drilling from floating support with independent underwater anchored guide base
Definitions
- the invention relates to a method and a device for drilling wells, in particular for prospecting and extraction drilling.
- Digging holes are used for the purpose of investigation from deposits and are supposed to take a sample of the material available in the deposit.
- Excavation holes are drilled in particular when the deposit is at greater depth and / or bodies of water above the deposit such as Lakes or oceans do not have to sink mines allow.
- Extraction wells serve to extract the content of the deposit from soil layers.
- Exemplary for extraction drilling be the degradation of those stored on the seabed marine sediments with diamond inclusions explained.
- Such deposits that contain diamonds have mostly in front of estuaries in the form of not too big, layers formed on rocky ground.
- To break down the diamond-containing sediment material mostly used devices that include a drill head, which with the help of a floating one Platform made of extending, extendable drill pipe is lowered to the sea floor. Under floating Platform is to understand every facility, its amount above the sea floor from the current water level depends. In particular, drill ships come in for this Consideration.
- the overburden loosened during the drilling process becomes mostly by so-called "backwashing" - for example by using the known air lifting method - by conveyed the interior of the drill string down to the platform, where he has one at the top of the drill string provided, related to its internal volume Pipe bend is fed into facilities where the separation of diamonds and overburden in a known manner he follows.
- the platform comprises a device the one caused, for example, by ocean swell allowed vertical movement of the platform without this the propulsive force fluctuates significantly or the Drill head is even lifted off the ground.
- Such facilities usually include with a relatively large compensation volume connected pneumatic or hydro-pneumatic Piston / cylinder devices, for example on the cylinder side with the drill string, on the piston side with a the device carrying the drill string, for example a Derrick. Because of the cylinders connected compensation volume, the platform can be vertical Exercise movements without losing the strength with which Drilling tool on the ground, changed significantly. Is the attachment point of the piston / cylinder devices on the platform side below that on the drill string, this can be done by adjusting the pressure in the expansion tanks the contact pressure of the drill head on the Seabed of maximum the resulting weight can be set to a desired value.
- From US-PS 3,319,726 is a device for Known drilling holes in the seabed in which the drill string to compensate for vertical movement the platform two axially displaceable relative to each other, telescopic interlocking drill string parts includes.
- the storage of the inner and outer drill string part serves an elaborate, several seals and Floating piston device for pressure equalization, the filled with a hydraulic fluid and against that Penetration of sediment completely encapsulated to the outside is.
- the disadvantage of this device is that it is complex in their manufacture and because of the complicated Construction is prone to failure.
- the drill string includes a telescopic part, which, among other things, the Compensate for movement induced by ocean thinning should.
- the drilling material is in these devices over the Interior of the drill string conveyed upwards by fresh water is supplied under pressure to the bore.
- the drill string contains two concentrically arranged tubes, which form an annular gap between them. By the The fresh water supply and removal are carried out in an annular gap of the drilling material through the inner tube.
- the drill strings too these devices are expensive to manufacture.
- the invention is therefore based on the object Method and an apparatus of the type mentioned such further develop that these disadvantages are improved.
- Drill string made of at least two telescopically interlocking Consists of strand parts which with a vertical, for example, motion induced by ocean swell the platform has a relative movement to one another it is no longer necessary for the drill string to be at least half the maximum vertical deflection to be expected the platform protrudes above it, but the upper one The end of the drill string can be directly above the platform surface lie.
- the drill head is rotationally fixed to the drill string arranged.
- a drive is provided on the platform that set the drill string in rotation (claim 2).
- the drill string is rotatably on the Platform stored and the drill head is relative to the drill string set in rotation.
- the drill string Management of electrical, hydraulic, etc. lines serve, without the need for complex rotating unions or coupling required.
- This can also be done on the lower part of the drill string easily an end one to the platform guided rope are attached, making the lower Drill string part including drill head without much energy expenditure for example, raised from the bottom of the hole and to the Location can be relocated to the ground where one further drilling is to be carried out.
- the invention is in terms of its device Aspect reproduced in claim 4.
- the drill string includes an outer and an inner one Drill string part, the inner drill string part - thus the vertical movement of the platform can be compensated can - at least over a length that is the maximum by Ocean swell or similar expected vertical Movement of the platform corresponds to the normal position the platform pushed into the outer and at least by an amount equal to the maximum expected Deflection of the platform from its normal position downwards corresponds, can be pushed further into the outer drill string part is.
- a particularly preferred technical configuration storage based on this principle is the subject of claims 7 to 10.
- the outer part of the drill string with its upper end at the platform and at the lower Arrange the drill head at the end of the inner drill string part.
- the arrangement provided in reverse because the upper, preferably longer, during drilling operations rigidly connected to the platform in the vertical direction upper drill string part from less expensive to manufacture Components.
- Device is a device on the platform provided with which the drill string rotates can be provided around its longitudinal axis.
- the drill head is then rotatably arranged on the drill string.
- the drill string is rotatably mounted on the platform and a rotary drive is provided with which Help the drill head rotate in relation to the drill string is relocatable.
- the non-rotatable mounting of the drill string on the platform takes place in accordance with this preferred embodiment Claim 14 preferably by a non-rotatable, gimbal Interception device ("gimbal").
- gimbal a non-rotatable, gimbal Interception device
- the drill head is preferably driven either electric or hydraulic (claims 15 and 16), the drive means preferably in the drill head integrated or arranged directly above it are.
- the one required to use the air lifting method Pressure line can according to claim 17 on the outer circumference of the Drill string be fixed and parallel to it Longitudinal central axis run.
- the Pressure line as a rollable from a winding drum Pressure hose formed (claim 18).
- This Measure has the advantage that the pressure hose on both upper drill string part as well as on the lower drill string part can be easily connected.
- An advantageous development of the invention Device is the subject of claim 19.
- In this is at least on the drill string part carrying the drill head a buoyancy body arranged.
- the Buoyancy volume of the buoyancy body can in the invention Device the desired contact pressure of the Drill head to be set on the seabed.
- buoyancy body is a part of the weight load on the platform be compensated so that heavier and thus longer drill string parts can be held and the Device also for digging bores in greater depths is suitable.
- the one designated as a whole by 100 in FIGS. 1 to 3 Device includes one on a floating platform 1 arranged mast 2, which is only hinted at in FIGS. 1 to 3 is shown. It is - as in Fig. 1 also only hinted at - equipped with a pulley 3, the raising or lowering of one or more Segments 4, 4 'one designated as a whole by 5 Drill string is used.
- the - as already explained at the beginning - from removable Segments 4, 4 'existing drill string 5 includes a upper drill string part 6 and a lower drill string part 7.
- the upper drill string part 6 opens telescopically at point 8 in the lower drill string part 7 and protrudes accordingly the representation in Fig. 1 up to point 9 in this inside.
- the upper and lower drill string parts 6, 7 are in that for inserting the upper part of the drill string provided length range designed such that the drill string parts 6.7 in this length range with low friction in the longitudinal direction of the drill string relative to each other can move, twisting the two drill string parts 6.7 against each other around the longitudinal central axis of the drill string however is not possible.
- One of these functional features bearing is shown below with reference to FIG. 4 and 5 will be described.
- a Drill head 10 is arranged, which with the help of a the lower drill string part arranged rotary drive 11 relative to that in the embodiment rotatably in the Platform mounted, the reaction torque absorbing Drill string 5 is rotatable.
- a hydraulic motor that via a hydraulic line 12 with pressurized Hydraulic fluid is supplied.
- the hydraulic drive an electric drive to use and instead of the hydraulic line 12 to provide an electrical line.
- Fig. 1 In the phase shown in Fig. 1 is the drill string 5 already by screwing individual segments 4 or 4 'mounted to its full length. At the top The end of the drill string is the outlet of the raised one Exhaust pipe elbows arranged. By synchronous Slackening of the pulley 3 and the winch 16 are the Drill string parts 6, 7 lowered until the upper area 18 of the upper drill string part 6 at the height of a gimbal suspended, in Fig. 1 schematically in the open Intercept device 19 shown in the state (“gimbal”) located.
- the device 100 In the state shown in Fig. 2, the device 100 positioned so that the drill head located above the location of the seabed to be removed.
- the Winch 16 subsided, causing the lower drill string part 7 by sliding down on the protruding into it Part of the upper drill string part 6 further lowered until the Drill head 10 rests on the seabed.
- the ropes 16 ' are now further reduced so that - as in Fig. 3 shown - sag slack in a loop.
- the resulting weight force of the lower drill string part 7 and the components connected to it determine the contact pressure between the face of the drill head and the Seabed.
- the lower drill string part 7 can in the further Penetration of the drill head 10 into the seabed 20 continue to slide freely from the upper drill string part 6.
- a buoyancy unit at the upper end of the lower drill string part 21 arranged.
- the essentially tubular upper one Drill string part comprises a tubular part 23 circular Cross-section that is in by means of flanges with each other screwable segments 4 is divided.
- About its in the lower length of drill string insertable are four Angular profiles 22 evenly distributed over the circumference parallel to the central longitudinal axis L on the tubular part 23 arranged.
- Each angle profile 22 comprises two legs 22 ', 22' 'which form a right angle to one another.
- the Angle profiles 22 are with the free edges of the legs 22 ', 22' 'with the tubular part 23 of the upper drill string part 6 over its length - at least in sections - welded.
- Each Roller assembly 24 includes two pairs of rollers 25, 26, wherein the rollers 25.25 '; 26.26' belonging to a pair in the direction the central longitudinal axis are spaced from each other and whose axes of rotation run parallel to each other, however the axes of rotation of the pairs of rollers 25, 26 of a pair of rollers 24 are aligned perpendicular to each other.
- Fig. 4 illustrated embodiment are in the longitudinal direction of the drill string two sets of four roller assemblies 24, 24 'provided to tilt the upper drill string part prevent in the lower drill string part can.
- Each roll assembly 24 includes a roll holder 27, the one on the outer lateral surface essentially tubular segment 4 'of the lower drill string part 7 are arranged. According to the orientation and number of the rollers 28 belonging to a roller arrangement 24 27 holes in the reel seat for receiving reel shafts 29 incorporated. The holes are like this arranged that the axes of rotation S essentially outside the cross section of the lower drill string part 7 are, but the rollers 28 through machined openings 30 protrude into the inner cross section of the segment 4 ', so that the treads 31 of the rollers accordingly the outer surfaces of the angle profiles 22 are aligned and when the drill string parts are pushed together 6,7 roll on the outer surfaces of the angle profiles.
- This type of storage is low-friction Movability of the upper and lower drill string part in the longitudinal direction relative to each other with simultaneous Transferability of high reaction moments around the central longitudinal axis L of the drill string guaranteed.
- the dissolved sediment penetrates through this measure due to the in the internal volume of the upper drill string part negative pressure prevailing by using the air lifting method through the lower opening of the inner tube 36 into the Interior of the upper drill string part so that it already so far not with the roller assemblies 24 or angle profiles 22 can come into contact. Furthermore, the negative pressure prevailing inside the upper drill string part 6 to the fact that through the annular gap 49 from the upper end of lower drill string part 7 always a certain amount Ambient water is sucked up and the roller assembly 24th and washed around the angle profiles 22, so that any penetrated Sediment parts are always washed out.
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- 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)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Description
Claims (22)
- Verfahren zum Niederbringen von Bohrlöchern, insbesondere von Schürf- und Gewinnungsbohrungen, in den Meeresboden (40), bei dem dieser mit Hilfe eines rotierenden Bohrkopfes (10) gelöst wird, der am unteren Ende eines für die Übertragung eines Drehmoments geeigneten Bohrstranges (5) angeordnet ist, dessen oberes Ende auf einer schwimmenden Plattform (1) gelagert ist, wobei der Bohrstrang (5) aus mindestens zwei teleskopartig ineinandergreifenden Strangteilen (6,7) besteht, die bei einer vertikalen, beispielsweise durch die Meeresdünung induzierten Bewegung der Plattform eine Relativbewegung zueinander ausüben, so daß der Bohrkopf (10) mit im wesentlichen konstanter Kraft an der abzutragenden Oberfläche aufliegt, dadurch gekennzeichnet,
daß gelöster Meeresboden durch Anwendung des Lufthebeverfahrens durch das Innere des Bohrstranges aus der Bohrung gefördert wird. - Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der Bohrkopf (10) drehfest an dem Bohrstrang angeordnet ist und zur Erzeugung der Rotation des Bohrkopfes (10) der Bohrstrang mit Hilfe eines an der Plattform vorgesehenen Drehantriebs (11) in Rotation versetzt wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der Bohrstrang (5) drehfest an der Plattform (1) angeordnet ist und der Bohrkopf (10) relativ zum Bohrstrang (5) in Rotation versetzt wird.
- Vorrichtung zum Niederbringen von Bohrungen, insbesondere Schürf- und Gewinnungsbohrungen, in den Meeresboden,
mit einem zur Übertragung eines Drehmoments geeigneten Bohrstrang, dessen oberes Ende an einer schwimmenden Plattform gelagert ist und dessen unteres Ende einen drehantriebbaren Bohrkopf trägt und der aus mehreren in axialer Richtung des Bohrstranges relativ zueinander reibungsarm verschiebbaren Bohrstrangteilen (6,7) besteht,
dadurch gekennzeichnet,
daß ein mit dem Stranginneren in Verbindung stehender Lufteinlaß vorgesehen ist, durch den über eine Druckleitung zugeführte Druckluft einblasbar ist. - Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß der Bohrstrang (5) einen äußeren und einen inneren Bohrstrangteil (6,7) umfaßt, wobei der innere Bohrstrangteil (6) zumindest über eine Länge, die der maximal durch Meeresdünung oder ähnlichen zu erwartenden vertikalen Bewegungen der Plattform nach oben entspricht, in den äußeren (7) eingreift und zumindest um einen Betrag, der der maximal zu erwartenden Auslenkung der Plattform aus ihrer Normallage nach unten entspricht, weiter in den äußeren Bohrstrangteil (7) hineinverlagerbar ist.
- Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß der innere Bohrstrangteil (6) zumindest über seinen maximal in den äußeren Bohrstrangteil hineinragenden Bereich über seinen Außenumfang verteilt angeordnete Schienen umfaßt, auf denen entsprechend über den Innenumfang des äußeren Bohrstrangteils verteilte Gleitstücke, vorzugsweise Rollen (28) laufen.
- Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß der innere Bohrstrangteil (6) rohrförmig ausgebildet ist und die Schienen aus in Richtung der Längsachse (L) des inneren Bohrstrangteils (6) verlaufenden, mit ihren freien Längskanten auf der Außenfläche des inneren Bohrstrangteils aufgeschweißten Winkelpofilen (22) bestehen.
- Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, daß der äußere Bohrstrangteil (7) in Längsrichtung desselben mindestens ein Laufrollenpaar (25,26'; 25',26') umfaßt, das derart angeordnet ist, daß die beiden Rollen des Laufrollenpaares jeweils einer Außenfläche eines Winkelprofils (22) zugeordnet ist und sich auf dieser rollend abstützt.
- Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß jedes der Winkelprofile zwei einen rechten Winkel zueinander aufweisende Schenkel (22',22") umfaßt und jedem Winkelprofil mindestens zwei in Längsrichtung beabstandete auf jeweils einer Schenkelaußenfläche laufende Rollenpaare zugordnet (24,24') sind.
- Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, daß der äußere Bohrstrangteil (7) rohrförmig ausgebildet ist und auf seinem äußeren Umfang befestigte Rollenhalter (27) umfaßt, die jeweils mindestens eine Rolle (28) derart aufnehmen, daß deren Achse (S) außerhalb des Querschnitts des äußeren Bohrstrangteils (7) liegt und deren Lauffläche durch einen in den äußeren Bohrstrangteil eingearbeiteten Ausschnitt (30) in den inneren Querschnitt des äußeren Bohrstrangteils hineinragt.
- Vorrichtung nach einem der Ansprüche 5 bis 10, dadurch gekennzeichnet, daß der innere Bohrstrangteil (6) mit seinem oberen Ende an der Plattform (1) gelagert ist und der äußere Bohrstrangteil (7) an seinem unteren Ende den Bohrkopf (10) trägt.
- Vorrichtung nach einem der Ansprüche 5 bis 11, dadurch gekennzeichnet, daß an der Plattform (1) eine Einrichtung zum Versetzen des Bohrstranges in eine Rotation um seine Längsachse (Kraftdrehkopf) angeordnet und der Bohrkopf drehfest an dem Bohrstrang angeordnet ist.
- Vorrichtung nach einem der Ansprüche 5 bis 11, dadurch gekennzeichnet, daß der Bohrstrang (5) drehfest an der Plattform (1) gelagert ist und ein Drehantrieb (11) vorgesehen ist, mit dessen Hilfe der Bohrkopf (10) gegenüber dem Bohrstrang (5) in Rotation versetzbar ist.
- Vorrichtung nach Anspruch 13, dadurch gekennzeichnet, daß der Lagerung des Bohrstranges (5) an der Plattform eine kardanische Abfangvorrichtung (19) (Gimbal) dient, die vorzugsweise zweiteilig ausgestaltet ist.
- Vorrichtung nach Anspruch 13 oder 14, dadurch gekennzeichnet, daß der Drehantrieb (11) elektrisch betrieben wird.
- Vorrichtung nach Anspruch 13 oder 14, dadurch gekennzeichnet, daß der Drehantrieb (11) hydraulisch betrieben wird.
- Vorrichtung nach einem der Ansprüche 4 bis 16, dadurch gekennzeichnet, daß die Druckleitung zum Einblasen der Druckluft in das Innere des Bohrstranges an dem Außenumfang des Bohrstranges festgelegt ist und parallel zu dessen Längsmittelachse verläuft.
- Vorrichtung nach einem der Ansprüche 4 bis 16, dadurch gekennzeichnet, daß als Druckleitung ein von einer Wickeltrommel abrollbarer Druckschlauch vorgesehen ist.
- Vorrichtung nach einem der Ansprüche 4 bis 18, dadurch gekennzeichnet, daß an dem den Bohrkopf tragenden Bohrstrangteil eine Auftriebseinheit (21) angeordnet ist.
- Vorrichtung nach Anspruch 19, dadurch gekennzeichnet, daß die Auftriebseinheit (21) nahe des oberen Endes des unteren Bohrstrangteils (7) angeordnet ist.
- Vorrichtung nach Anspruch 19 oder 20, dadurch gekennzeichnet, daß die Auftriebseinheit (21) mindestens einen wahlweise mit Druckluft füllbaren Tank umfaßt.
- Vorrichtung nach einem der Ansprüche 4 bis 21, dadurch gekennzeichnet, daß an dem Bohrstrangteil, dessen oberes Ende an der Plattform gelagert ist, mindestens ein Auftriebskörper (70) vorgesehen ist.
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19651303 | 1996-12-10 | ||
DE19651303 | 1996-12-10 | ||
DE19702984A DE19702984C1 (de) | 1996-12-10 | 1997-01-28 | Verfahren und Vorrichtung zum Niederbringen von Bohrlöchern, insbesondere für Schürf- und Gewinnungsbohrungen, in den Meeresboden |
DE19702984 | 1997-01-28 | ||
PCT/DE1997/002770 WO1998026151A2 (de) | 1996-12-10 | 1997-11-27 | Verfahren und vorrichtung zum niederbringen von bohrlöchern, in den meeresboden durch anwendung eines gegenspülverfahrens |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0956424A2 EP0956424A2 (de) | 1999-11-17 |
EP0956424B1 true EP0956424B1 (de) | 2001-01-24 |
Family
ID=26032067
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97951814A Expired - Lifetime EP0956424B1 (de) | 1996-12-10 | 1997-11-27 | Verfahren und vorrichtung zum niederbringen von bohrlöchern in den meeresboden durch anwendung eines gegenspülverfahrens |
Country Status (4)
Country | Link |
---|---|
US (1) | US6422324B1 (de) |
EP (1) | EP0956424B1 (de) |
AU (1) | AU730041B2 (de) |
WO (1) | WO1998026151A2 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NO315807B3 (no) * | 2002-02-08 | 2008-12-15 | Blafro Tools As | Fremgangsmate og anordning ved arbeidsrorkopling |
US7458425B2 (en) * | 2004-09-01 | 2008-12-02 | Anadarko Petroleum Corporation | System and method of installing and maintaining an offshore exploration and production system having an adjustable buoyancy chamber |
US20060162933A1 (en) * | 2004-09-01 | 2006-07-27 | Millheim Keith K | System and method of installing and maintaining an offshore exploration and production system having an adjustable buoyancy chamber |
CN110159210A (zh) * | 2019-04-25 | 2019-08-23 | 中国地质大学(武汉) | 一种波浪位移补偿装置 |
US10975630B1 (en) | 2020-02-06 | 2021-04-13 | Saudi Arabian Oil Company | Expansion tubing joint with extendable cable |
CN116771352B (zh) * | 2023-07-13 | 2023-12-29 | 中国海洋大学 | 一种垮塌式海砂抽采的采集装备及方法 |
Family Cites Families (24)
Publication number | Priority date | Publication date | Assignee | Title |
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US3259198A (en) | 1963-05-28 | 1966-07-05 | Shell Oil Co | Method and apparatus for drilling underwater wells |
US3387672A (en) | 1964-06-26 | 1968-06-11 | Mobil Oil Corp | Cavitational method for drilling wells |
US3319726A (en) * | 1964-10-29 | 1967-05-16 | Brown Oil Tools | Extensible couplings for well pipes |
US3631932A (en) * | 1968-09-03 | 1972-01-04 | Longyear Co E J | Offshore drilling apparatus and method |
US3603409A (en) | 1969-03-27 | 1971-09-07 | Regan Forge & Eng Co | Method and apparatus for balancing subsea internal and external well pressures |
US3664443A (en) * | 1969-11-28 | 1972-05-23 | Walker Neer Mfg Co | Dual circulation bumper subs |
US3633685A (en) * | 1970-03-09 | 1972-01-11 | Manuel R Piexoto | Deep well drilling apparatus |
US3726546A (en) * | 1970-06-29 | 1973-04-10 | C Brown | Extensible coupling for well pipes |
US3763580A (en) * | 1970-12-10 | 1973-10-09 | Global Marine Inc | Apparatus for dredging in deep ocean |
US3764168A (en) * | 1971-10-12 | 1973-10-09 | Schlumberger Technology Corp | Drilling expansion joint apparatus |
US3823788A (en) * | 1973-04-02 | 1974-07-16 | Smith International | Reverse circulating sub for fluid flow systems |
US3889764A (en) * | 1974-01-14 | 1975-06-17 | Charme Leon Du | Well drilling method and apparatus |
US3919958A (en) * | 1974-06-13 | 1975-11-18 | Global Marine Inc | Deep ocean mining ship |
US3940982A (en) * | 1974-09-16 | 1976-03-02 | The United States Of America As Represented By The Secretary Of The Navy | Subbottom rock mapping probe |
US4055224A (en) * | 1975-07-01 | 1977-10-25 | Wallers Richard A | Method for forming an underground cavity |
US4136633A (en) * | 1977-06-06 | 1979-01-30 | Exxon Production Research Company | Device for restraining lateral movement of subsea equipment |
US4234047A (en) * | 1977-10-14 | 1980-11-18 | Texaco Inc. | Disconnectable riser for deep water operation |
US4448269A (en) | 1981-10-27 | 1984-05-15 | Hitachi Construction Machinery Co., Ltd. | Cutter head for pit-boring machine |
AU555868B2 (en) * | 1982-03-15 | 1986-10-16 | Turkmensky Nauchno-Issledovatelsky Geologorazvedochny Institut | Air lift valve |
GB2163465A (en) | 1984-08-21 | 1986-02-26 | Timothy John Godfrey Francis | Drill rod for drilling boreholes |
FR2617231B1 (fr) * | 1987-06-26 | 1989-11-10 | Inst Francais Du Petrole | Methode et appareillage pour executer depuis une installation de surface flottante des operations de forage et des interventions dans un puits subaquatique |
DE3920392A1 (de) * | 1989-06-22 | 1991-01-10 | Bilfinger Berger Bau | Verfahren zum abbau und zur foerderung einer unter wasser lagernden bodenschicht und vorrichtung zur durchfuehrung des verfahrens |
US5035291A (en) | 1990-07-06 | 1991-07-30 | Amoco Corporation | Seafloor drilling apparatus |
US5139094A (en) * | 1991-02-01 | 1992-08-18 | Anadrill, Inc. | Directional drilling methods and apparatus |
-
1997
- 1997-11-27 WO PCT/DE1997/002770 patent/WO1998026151A2/de active IP Right Grant
- 1997-11-27 US US09/319,657 patent/US6422324B1/en not_active Expired - Fee Related
- 1997-11-27 EP EP97951814A patent/EP0956424B1/de not_active Expired - Lifetime
- 1997-11-27 AU AU55483/98A patent/AU730041B2/en not_active Ceased
Also Published As
Publication number | Publication date |
---|---|
AU5548398A (en) | 1998-07-03 |
WO1998026151A2 (de) | 1998-06-18 |
US6422324B1 (en) | 2002-07-23 |
EP0956424A2 (de) | 1999-11-17 |
AU730041B2 (en) | 2001-02-22 |
WO1998026151A3 (de) | 1998-10-01 |
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