EP2513409B1 - Dämpfersystem für ein vorbohrloch - Google Patents

Dämpfersystem für ein vorbohrloch Download PDF

Info

Publication number
EP2513409B1
EP2513409B1 EP10798772.9A EP10798772A EP2513409B1 EP 2513409 B1 EP2513409 B1 EP 2513409B1 EP 10798772 A EP10798772 A EP 10798772A EP 2513409 B1 EP2513409 B1 EP 2513409B1
Authority
EP
European Patent Office
Prior art keywords
deck
pipe
tubular
flange
guide tube
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.)
Not-in-force
Application number
EP10798772.9A
Other languages
English (en)
French (fr)
Other versions
EP2513409A2 (de
Inventor
Dag Magnus Holen
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.)
TTS Sense As
Original Assignee
TTS Sense As
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 TTS Sense As filed Critical TTS Sense As
Priority to EP14167290.7A priority Critical patent/EP2792839B1/de
Publication of EP2513409A2 publication Critical patent/EP2513409A2/de
Application granted granted Critical
Publication of EP2513409B1 publication Critical patent/EP2513409B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • E21B19/14—Racks, ramps, troughs or bins, for holding the lengths of rod singly or connected; Handling between storage place and borehole

Definitions

  • the present invention relates to a device to dampen impacts when a pipe or a pipe stand falls down into a so-called mouse hole.
  • a mouse hole is used to temporarily place pipes in connection with drilling operations and is also used to build up pipe stands. This is described in detail in NO 322116 which belongs to the applicant.
  • Mouse holes have developed from one single hole in the ground on land-based rigs to sophisticated solutions, such as the above mentioned, placed on offshore installations.
  • a problem that has existed almost from the start is that pipes that shall be placed in the mouse hole are sometimes dropped down into the hole, either because the operator is careless or because an accident happens. If this occurs the pipe will go straight through the mouse hole, and also what may be underneath, and could cause serious damages to, for example, a floating installation, or even to the wellhead on the ocean bed. This can again lead to release of well fluid and consequent serious discharge damages.
  • This dampening mechanism may function satisfactorily if the pipe is not too solid or is not dropped from too great a height.
  • long pipe lengths stands
  • these days encompassing three or four individual pipes. This means that the pipe body has a considerable mass in total.
  • the pipe body is also fitted with a weight pipe or other components that increase the mass considerably.
  • a dampening mechanism as in the above mentioned US 3,689,060 will then be too weak.
  • US 5,468,121 shows another example of a dampening device.
  • an air-filled bellows is used to dampen the impact.
  • the bellows would not be able to withstand the large forces exerted by the pipe body either.
  • US 4160060 describes a device for catching a falling object that comprises a large box-like structure to be placed under the deck.
  • this structure must have a relatively large extent to be able to absorb the impact force. Hence it occupies a large valuable space. A space which could have been used for other types of necessary equipment.
  • Figure 1 shows a mouse hole device, denoted only as a mouse hole in the following for the sake of simplicity, according to a first embodiment of the invention. It comprises a main tube 1 that stretches from the bottom part of the device up to the underside of a deck 2. The upper end of the main tube 1 lies against the underside of the deck 2, but is not fastened to it. An opening 3 is made in the deck 2, which in figure 1 is closed by a cover 4. A guide tube 5 is placed outside the main tube 1. A lower flange 6 is placed just below the guide tube 5 and is, for example, welded to the main tube 1, but not to the guide tube 5. The guide tube 5 is fastened, for example, welded at its upper end to the underside of the deck 2.
  • the guide tube 5 is also fitted with an intermediate support flange 7 which serves as a guide for the tension struts 8, as these pass through the flange 7 with a narrow clearance.
  • tensions struts 8 are placed outside the guide tube 5.
  • the number of tension struts 8 is not critical, but four tension struts give a good balance and distribution of the forces.
  • the tension struts 8 are fastened to the lower flange 6 in that the tension struts are fitted with threads at the bottom onto which nuts are screwed. At their upper ends, the tension struts 8 are fastened to the deck 2 in a corresponding way.
  • the main tube 1 is thereby suspended in the tension struts 8 from the deck 2.
  • Figure 2a shows a section through the device in figure 1 with a pipe length 25 placed in the device.
  • a dampening mechanism 26 is placed at the bottom of the main tube 1 to dampen small knocks from the pipe 25.
  • Figure 2b shows the guide tube 5 separately.
  • the guide tube 5 in this embodiment is fitted with an upper flange 27 that can be screwed securely to the deck 2 via a recess in the deck as will be explained in more detail in connection with figure 4 .
  • the tension struts (see figure 2a ) are screwed securely to the upper flange 27.
  • the intermediate flange 7 is preferably secured by welding.
  • triangular ribs 28 are secured by welding, which are set up to lie against the lower flange 6 (see figure 2a ) on the main tube 1, so that a good contact surface is made and to prevent that the mouse hole gets stuck when hoisted up or lowered down through the hole 3 in the deck 2.
  • Figure 2c shows the main tube 1 separately. It has an upper part 1a, above the flange 6, which is set up to be led into the guide tube 5 and a lower part 1b, below the flange 6, which is set up to be located below the guide tube 5. At its bottom end a bottom assembly 29 is arranged, which contains the dampening mechanism 26.
  • the tension struts 8 have preferably a somewhat larger diameter at their upper and lower ends than in the middle section. This ensures that the extension occurs in the middle section and that the tension struts do not break at the fastening points.
  • Figure 4a shows a section through the device at the deck 2.
  • Figure 4b shows a plane outline of the same.
  • two mouse hole devices according to the invention are shown placed next to each other.
  • the guide tube 5 and the tension struts 8 are not directly fastened to the deck, but via a structure 11.
  • This structure comprises in general a recess in the deck 2 that carries the upper flange 27 from which the tension struts 8 are suspended and to which the guide tube 5 is securely welded.
  • the main tube 1 is received inside the guide tube 5 but not fastened to this.
  • the upper flange 27 also carries a centring device 13, which is not part of this invention and shall therefore not be explained in more detail.
  • the upper flange 27 is carried by a deck section or collar 14. This rests on its side on two beams (not shown) that form a part of the carrying construction of the deck 2.
  • the structure 11 forms a box-like structure that has an upper surface 18 that joins the surface of the deck 2.
  • an opening is formed for pipe 25.
  • a funnel 19 is arranged on the underside of the opening and contributes to guiding the pipe 25 down into the mouse hole.
  • FIG. 5 shows the lower part of the mouse hole.
  • a dampening mechanism 26 is arranged here, which is capable of absorbing smaller knocks as a consequence of the normal setting down of pipes. This is formed to prevent damage to the threads of the pipe if it is put down too hard in the mouse hole. At the same time the pipe is centred and it is formed to drain any sludge or oil residues.
  • the dampening mechanism 26 comprises a thick rubber body that shall dampen the impact from knocks. The rubber body is covered with a soft stainless steel plate onto which the pipes are placed. If a heavy pipe should fall down in the mouse hole, this dampening mechanism will only absorb a very small part of the kinetic energy. If this is exceeded the dampening device according to the invention will take over the absorption of the impact.
  • the diameter and ductility of the tension struts are adjusted so that they are capable of absorbing the largest expected kinetic energy from the falling pipe without breaking and with a good safety margin. As these extensions absorb the forces from the pipe it will be only these forces that are led further out in the system. Thus, it is easy to dimension the struts so that the forces from these will not lead to appreciable, incidental damage to the mouse hole construction.
  • the guide tube 5 and the intermediate flange 7 are set up to guide the main tube 1 and ensure that the tension struts are stretched evenly and no lopsided position occurs. If one of the tension struts has a fault, the other tensions struts will have sufficient capacity to absorb the energy from a maximum falling load.
  • the main tube After the tension struts 8 have been extended plastically, the main tube will have been displaced a distance downwards, as shown in figure 3 .
  • the top of the main tube 1 will then lie a distance from the upper flange 27 and the lower flange 6 will lie a corresponding distance from the lower end of the guide tube 5. This distance can be detected so that one can get a clear indication that the tension struts 8 have gone through a plastic deformation.
  • the tension struts are relatively cheap components that are made from a cheap material. They are preferably manufactured from a soft stainless steel, such as, for example, 316L.
  • the dampening device is also used in mouse holes of a variable length, for example, a telescopic mouse hole.
  • the tension struts will then preferably be connected to the uppermost of the telescopic tubes, which are secured to the deck.
  • the number of tension struts can be varied. It is an advantage if the number can be chosen so that there is redundancy in the system i.e. that even if one or more of the tension struts should accidentally break, the others will have sufficient capacity to be able to absorb the forces.
  • tension struts in the form of rods, the tension struts can also have different forms, for example, tubes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Supports For Pipes And Cables (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Exhaust Silencers (AREA)
  • Vibration Dampers (AREA)
  • Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)

Claims (9)

  1. Vorrichtung zum Dämpfen des Aufpralls, wenn eine Röhre (25) oder ein Röhrenständer in eine Vorbohrlochanordnung fällt, wobei die besagte Vorbohrlochanordnung zumindest ein Röhren aufnehmendes Rohrelement (1) mit einem Boden (26) umfasst, welches Rohrelement (1) angepasst ist, eine Röhre (25) oder einen Röhrenständer aufzunehmen, dadurch gekennzeichnet, dass das zumindest eine Rohrelement (1) mit einem ersten Ende von zumindest einem Dehnungselement (8) verbunden ist, welches an einem zweiten Ende mit einem Deck (2) oder einer Struktur verbunden ist, das bzw. die permanent mit dem Deck (2) verbunden ist und, dass das zumindest eine Dehnungselement (8) angepasst ist, die kinetische Energie von der fallenden Röhre (25) oder dem Röhrenständer zu absorbieren, indem es eine plastische Verformung durchmacht, ohne zu brechen.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass ein Führungsrohr (5) konzentrisch mit zumindest einem Rohrelement (1) angeordnet ist und, dass das Führungsrohr (5) an das Deck (2) oder eine Struktur befestigt ist, die am Deck (2) befestigt ist.
  3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass das zumindest eine Rohrelement (1) mit einem Flansch (6) zur Befestigung des ersten Endes des zumindest einen Dehnungselements (8) versehen ist.
  4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass der Flansch (6) am zumindest einem Rohrelement (1) derartig angeordnet ist, dass ein beträchtlicher Teil des Rohrelements (1) zwischen dem Flansch (6) und dem Deck (2) positioniert ist und, dass das Rohrelement (1) an das Deck (2) oder eine andere Struktur befestigt ist, die an das Deck (2) ausschließlich über das zumindest eine Dehnungselement (8) befestigt ist.
  5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass sie eine Reihe von Dehnungselementen (8) umfasst, die auf der Außenseite des Führungsrohrs (5) verlaufen und gegenseitig beabstandet um die Führungsrohr (5) herum platziert sind.
  6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass das Führungsrohr (5) mit einem Führungsflansch (7) auf halben Weg zwischen dem Flansch (6) zur Befestigung der Dehnungselemente (8) und dem Deck (2) versehen ist, durch welchen Führungsflansch (7) sich die Dehnungselemente (8) mit einem sehr kleinen Spiel erstrecken.
  7. Vorrichtung nach einem beliebigen der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das Dehnungselement (8) ein Zugstab ist.
  8. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass der Zugstab einen größeren Durchmesser an seinen Enden hat.
  9. Vorrichtung nach Ansprüchen 7 oder 8, dadurch gekennzeichnet, dass der Zugstab aus einem duktilen, rostfreien Stahl hergestellt ist.
EP10798772.9A 2009-12-17 2010-12-17 Dämpfersystem für ein vorbohrloch Not-in-force EP2513409B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14167290.7A EP2792839B1 (de) 2009-12-17 2010-12-17 Dämfungssystem und -verfahren für Vorbohrloch

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20093546A NO330793B1 (no) 2009-12-17 2009-12-17 Dempeanordning for musehull
PCT/EP2010/070020 WO2011083028A2 (en) 2009-12-17 2010-12-17 Mouse hole dampening system

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP14167290.7A Division EP2792839B1 (de) 2009-12-17 2010-12-17 Dämfungssystem und -verfahren für Vorbohrloch
EP14167290.7A Division-Into EP2792839B1 (de) 2009-12-17 2010-12-17 Dämfungssystem und -verfahren für Vorbohrloch

Publications (2)

Publication Number Publication Date
EP2513409A2 EP2513409A2 (de) 2012-10-24
EP2513409B1 true EP2513409B1 (de) 2014-06-11

Family

ID=44059091

Family Applications (2)

Application Number Title Priority Date Filing Date
EP14167290.7A Not-in-force EP2792839B1 (de) 2009-12-17 2010-12-17 Dämfungssystem und -verfahren für Vorbohrloch
EP10798772.9A Not-in-force EP2513409B1 (de) 2009-12-17 2010-12-17 Dämpfersystem für ein vorbohrloch

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP14167290.7A Not-in-force EP2792839B1 (de) 2009-12-17 2010-12-17 Dämfungssystem und -verfahren für Vorbohrloch

Country Status (3)

Country Link
EP (2) EP2792839B1 (de)
NO (1) NO330793B1 (de)
WO (1) WO2011083028A2 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO20111133A1 (no) * 2011-08-17 2013-02-18 Aker Mh As Et musehullapparat
NO341038B1 (no) * 2013-08-12 2017-08-07 Mhwirth As Dempeanordning for fallende rør i musehull
KR101563672B1 (ko) * 2014-03-25 2015-10-27 삼성중공업 주식회사 해양구조물
EP3898403A4 (de) * 2018-12-21 2023-02-22 Zentech, Inc. Socke für schwimmendes schiff

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US690676A (en) * 1901-09-20 1902-01-07 George F Tait Tubing-protector for oil-wells.
US3689060A (en) * 1970-08-19 1972-09-05 William Burton Hensley Jr Retainer device
US3966054A (en) * 1975-05-22 1976-06-29 Bj-Hughes Inc. Shock absorber for tubular storage or drill stands on a drilling ship
US4160060A (en) * 1978-01-23 1979-07-03 Continental Oil Company Platform safety barrier
US5468121A (en) * 1994-02-08 1995-11-21 Stogner; Huey Apparatus and method for positioning drill pipe in a mousehole
NO309537B1 (no) 1999-03-03 2001-02-12 Eng & Drilling Machinery As Anordning ved et boredekk pa en boreplattform
NO322116B1 (no) 2004-12-01 2006-08-14 Sense Edm As Anordning for a bygge opp og ned rorseksjoner
NO333743B1 (no) * 2005-10-12 2013-09-09 Nat Oilwell Norway As Anordning ved boredekk

Also Published As

Publication number Publication date
NO20093546A1 (no) 2011-06-20
EP2513409A2 (de) 2012-10-24
WO2011083028A3 (en) 2011-10-20
NO330793B1 (no) 2011-07-18
WO2011083028A2 (en) 2011-07-14
EP2792839B1 (de) 2018-05-02
EP2792839A1 (de) 2014-10-22

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