CN103993860B - A kind of offshore drilling basal disc - Google Patents
A kind of offshore drilling basal disc Download PDFInfo
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- CN103993860B CN103993860B CN201410166195.7A CN201410166195A CN103993860B CN 103993860 B CN103993860 B CN 103993860B CN 201410166195 A CN201410166195 A CN 201410166195A CN 103993860 B CN103993860 B CN 103993860B
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Abstract
This technology relates to a kind of offshore drilling basal disc, is a kind of deep seafloor probing basal disc that can automatically keep drilling hole axis vertical state when transferring, laying；Including being provided with the basal disc body of drilling hole, it is arranged on the pillar under basal disc body, is arranged on the boom hoisting on basal disc body；The telescopic pillar of at least three is distributed in the outside of drilling hole, and pillar axes is parallel to drilling hole axis；Boom hoisting includes steel wire rope, two lifting pulleys and at least one leading block；Lifting pulley and leading block are all the fixed pulley being positioned at outside drilling hole, two lifting pulley axis in outside are all orthogonal with the face of cylinder with drilling hole axis as axis, leading block axis is parallel with drilling hole axis, when steel wire penetrating lifting pulley and leading block lifting, the axis of steel wire rope vertical portion and drilling hole axis co-planar；During the lifting offshore drilling's basal disc of steel wire rope two ends, the center of gravity of offshore drilling's basal disc is positioned on drilling hole axis.
Description
Technical field
This technology relates to a kind of offshore drilling basal disc, is that one can automatically keep drilling hole axis to erect when transferring, laying
The deep seafloor probing basal disc of straight state.
Background technology
Needs due to marine resources development, it is desirable to deep-sea (300 meters to 3000 meters) seabed (is less than at underwater gradient
When 25 °) drill.A probing basal disc must be transferred to seabed before probing, be bored by probing basal disc drilling hole position
Visit operation.When decentralization process is especially laid, it is difficult to keep drilling hole axis to be in vertical state, due to lacking of boom hoisting
Fall into, interference is also brought along for drilling operation；Because water is too deep, personnel dive cannot be done directly to seabed and transfer operation.
Summary of the invention
The purpose of this technology be to provide a kind of especially can keep when laying when transferring drilling hole axis vertical state,
For offshore drilling's basal disc that drilling operation is glitch-free.
The purpose of this technology is to be achieved through the following technical solutions:
This offshore drilling basal disc, including being provided with the basal disc body of drilling hole, is arranged on the pillar under basal disc body, is arranged on
Boom hoisting on basal disc body；The telescopic pillar of at least three is distributed in the outside of drilling hole, and pillar axes is parallel to probing
Axially bored line；Boom hoisting includes steel wire rope, two lifting pulleys and at least one leading block；Lifting pulley and leading block are all
For being positioned at the fixed pulley outside drilling hole, two lifting pulley axis in outside are all vertical with drilling hole axis, leading block axle
Line is parallel with drilling hole axis, steel wire penetrating lifting pulley and leading block lifting time, the axis of steel wire rope vertical portion with
Drilling hole axis co-planar；During the lifting offshore drilling's basal disc of steel wire rope two ends, the center of gravity of offshore drilling's basal disc is positioned at drilling hole axis
On.
This technology provides the benefit that;
Being lifted by crane by two fixed pulleys with steel wire rope, steel wire rope projection is positioned at the outside of drilling hole, will not be to probing
Operation interferes.
The center of gravity of offshore drilling's basal disc is positioned on drilling hole axis, and far below two Heave Heres, basal disc is at two identical pulling force
Effect under the most automatically keep drilling hole axis be in vertical state.
Using telescopic pillar, when laying, the length automatically adjusting each pillar adapts with sea-floor relief, to ensure to bore
Inspecting hole axis is in vertical state.
This offshore drilling's basal disc is when transferring, and two lifting ropes are the most equal for the moment of offshore drilling's basal disc, it is easy to
Affected by ocean current etc.；This offshore drilling's basal disc in use, can run into owing to each pillar is relative to the power of drilling hole axis
It is unreliable that arm lower rod end not of uniform size, each contacts with seabed, and then brings offshore drilling's basal disc to be difficult to after laying keep being wished
The state hoped；Adjust the problems such as the length difficulty of each pillar is bigger, need this offshore drilling's basal disc is improved.
One of improve, be the improvement to steel wire rope Heave Here:
When steel wire penetrating lifting pulley and leading block lifting, the axis of steel wire rope vertical portion is to drilling hole axis
Apart from equal.The steel wire rope projection making vertical portion is positioned at two point of symmetry, and two lifting ropes are for the moment phase of offshore drilling's basal disc
Deng.
The two of improvement, are the improvement to the pillar structure arranging position and pillar on basal disc body:
The telescopic pillar of at least three is distributed in the outside of drilling hole, and pillar is distributed on the point on drilling hole axis
For on the center of circle and the circumference vertical with drilling hole axis.This improvement, makes offshore drilling's basal disc in use, each pillar relative to
The arm of force of drilling hole axis is equal, improves stability.
Pillar is identical plunger case；The oil inlet and outlet of plunger case communicates；The outer end of plunger case plunger is tapered or wedge shape.
These improve, and the plunger case that oil inlet and outlet communicates constitutes a space hydraulic spring grease cup, if relatively big (the i.e. plunger of plunger case plunger stress
Contact with higher position, seabed), plunger bounces back, and plunger case that is less to stress or that do not stress arranged by hydraulic oil, makes corresponding plunger case
Plunger overhanging, automatically to adapt to the sea-floor relief that height rises and falls, keep drilling hole axis to be in vertical state；Use outer end in
The plunger of the plunger case of taper or wedge shape, overcomes mud for the resistance of plunger, makes plunger be easily inserted seabed, reliable with seabed
Contact, improves stability.
Accompanying drawing explanation
Fig. 1 is the front view of this offshore drilling basal disc
Fig. 2 is the left view of this offshore drilling basal disc
Fig. 3 is the force analysis figure that this offshore drilling basal disc is in poised state
Fig. 4 is the force analysis figure of this offshore drilling basal disc right low left high state by External Force Acting
Fig. 5 be this offshore drilling basal disc by External Force Acting the force analysis figure of the left low state of right height
Detailed description of the invention
Below in conjunction with the accompanying drawings, this technology is illustrated:
See the offshore drilling's basal disc shown in Fig. 1, Fig. 2, this offshore drilling basal disc mainly by basal disc body 1, pillar and
Device for hoisting forms.
This offshore drilling basal disc, including being provided with the basal disc body 1 of drilling hole, is arranged on the pillar under basal disc body 1, arranges
Boom hoisting on basal disc body 1,；The telescopic pillar of at least three is distributed in the outside of drilling hole 10, and pillar axes is parallel
In drilling hole 10 axis；Boom hoisting includes steel wire rope, two lifting pulleys 6 and at least one leading block 9；Lifting pulley 6
Be all, with leading block 9, the fixed pulley being positioned at outside drilling hole 10, two lifting pulley 6 axis in outside all with drilling hole 10
The face of cylinder that axis is axis orthogonal, leading block 9 axis is parallel with drilling hole 10 axis, steel wire penetrating lifting pulley 6
When lifting by crane with leading block 9, the axis of steel wire rope vertical portion and drilling hole 10 axis co-planar；Lifting seabed, steel wire rope two ends is bored
When visiting basal disc, the center of gravity of offshore drilling's basal disc is positioned on drilling hole 10 axis.
In fact:
Offer drilling hole 10 in basal disc body 1, basal disc body 1 be one with the axis of drilling hole 10 as axis, both ends of the surface with
The cylinder that its axis is vertical.
Pillar is arranged on below basal disc body 1, and the quantity of pillar is at least three, typically choose six (be illustrated as six,
It is distributed in regular hexagon).The concrete structure of pillar uses identical plunger case；The setting on basal disc body 1 of the single plunger case
Mode is: plunger cylinder 3 is fixed in basal disc body 1, and cylinder body 3 axis is parallel with drilling hole 10 axis, and plunger 4 moves and is arranged on
In cylinder body 3；Multiple plunger cases portion's mode of putting on basal disc body 1 is: plunger case is distributed on and with the point on drilling hole 10 axis is
On the center of circle and the circumference vertical with drilling hole 10 axis；Plunger case is identical relative to the height of basal disc body 1 upper surface；Multiple plungers
The oil inlet and outlet 2 of cylinder is by being sequentially communicated airtight annular communicating pipe 5, and annular is arranged on the outside of drilling hole 10 communicating pipe 5；Post
Plug 4 outer end is tapered or wedge shape.
Boom hoisting includes that shown in steel wire rope, two lifting pulleys 6 and at least one leading block 9(figure be one)；
Lifting pulley 6 and leading block 9 are all the fixed pulley being positioned at outside drilling hole 10；Outside two lifting pulley 6 axis all with
The face of cylinder with drilling hole 10 axis as axis is orthogonal, and leading block 9 axis is parallel with drilling hole 10 axis；Steel wire penetrating rises
When Hanging roller 6 and leading block 9 lift by crane, vertical portion is lifting rope 7, and the part between leading block 9 and lifting pulley 6 is for leading
To rope 8, the now axis of lifting rope 7 and drilling hole 10 axis co-planar, the axis of lifting rope 7 is to the distance phase of drilling hole 10 axis
Deng.During it is to say, steel wire penetrating lifting pulley 6 and leading block 9 lift by crane, the lifting rope 7 projection on basal disc body 1 is relative
Symmetrical in the diameter shaft of drilling hole 10.When steel wire penetrating lifting pulley 6 and leading block 9 lift by crane, guide rope 8 is away from drilling hole
10。
During the lifting offshore drilling's basal disc of steel wire rope two ends, the center of gravity of offshore drilling's basal disc is positioned on drilling hole 10 axis.Root
According to diagram, it is true that the center of gravity of probing basal disc is positioned at the lower section of basal disc body 1 upper surface.
Below in conjunction with the accompanying drawings, describe in detail and this transfer, when laying offshore drilling's basal disc, automatically keep drilling hole axis to erect
Straight principle, method.
Shown in Figure 3, drilling hole axis vertical is time i.e. offshore drilling's basal disc is in poised state, F be lifting rope for
The pulling force of offshore drilling's basal disc, C is the center of gravity of offshore drilling's basal disc, and G is the gravity that offshore drilling's basal disc is subject to.Then:
M=F L Con α-F L Con α
=F AD-F DB
=0
Shown in Figure 4, offshore drilling's basal disc is by External Force Acting during right low left high, then:
M=F L Con (alpha+beta)-F L Con (alpha-beta)
=F AE-F GB
＜ 0
Offshore drilling's basal disc, by turning anticlockwise moment loading, will be turned back to poised state.
Shown in Figure 5, offshore drilling's basal disc by External Force Acting right height left low time, then:
M=F L Con (alpha-beta)-F L Con (alpha+beta)
=F AI-F HB
＞ 0
Offshore drilling's basal disc, by flywheel moment effect clockwise, will be turned back to poised state.
When transferring, single 6500 meters are used to be wound on two reels independently without lay winding wire ropes, steel wire rope two two ends
On, two winches can work simultaneously, it is also possible to works alone, the most standby, in satisfied 3000 meters of degree of depth drilling operation requirements
While, also improve security reliability.
In installation course, plunger case original state is that six plungers respectively stretch out half.When offshore drilling basal disc fall put to
When plunger just touches seabed, the plunger contacting seabed at first inserts seabed, inwardly bounces back because of stress, and hydraulic oil is by connection
Pipe flow is to the less plunger case of non-stress or stress so that it is plunger is overhanging；Along with offshore drilling's basal disc gradually sinks, offshore drilling
Six plungers of basal disc subject equal power all the time；Although submarine relief is uneven, but basal disc offshore drilling is flatly all the time
Slowly sit at the end, i.e. keep drilling hole axis vertical.
This technology provides the benefit that:
Being lifted by crane by two fixed pulleys with steel wire rope, steel wire rope projection is positioned at the outside of drilling hole, guide rope away from
Drilling hole, annular is also disposed at the outside of drilling hole communicating pipe, will not interfere drilling operation.
The center of gravity of offshore drilling's basal disc is positioned on drilling hole axis, the lower section of two Heave Heres, and basal disc is at two identical pulling force
Effect under the most automatically keep drilling hole axis be in vertical state.
Using telescopic pillar, when laying, the length automatically adjusting each pillar adapts with sea-floor relief, to ensure to bore
Inspecting hole axis is in vertical state.
Use two winches independently, the most standby, improve security reliability.
Claims (7)
1. offshore drilling's basal disc, including being provided with the basal disc body of drilling hole, is arranged on the pillar under basal disc body, is arranged on base
Boom hoisting on disk body, is characterized in that, the telescopic pillar of at least three is distributed in the outside of drilling hole, and pillar axes is parallel
In drilling hole axis；Boom hoisting includes steel wire rope, two lifting pulleys and at least one leading block；Lifting pulley and guiding
Pulley is all the fixed pulley being positioned at outside drilling hole, and two lifting pulley axis in outside are all vertical with drilling hole axis, guides
Pulley axis is parallel with drilling hole axis, when steel wire penetrating lifting pulley and leading block lifting, steel wire rope vertical portion
Axis and drilling hole axis co-planar；During the lifting offshore drilling's basal disc of steel wire rope two ends, the center of gravity of offshore drilling's basal disc is positioned at probing
On axially bored line.
Offshore drilling the most according to claim 1 basal disc, is characterized in that, steel wire penetrating lifting pulley and leading block rise
When hanging, the axis of steel wire rope vertical portion is equal to the distance of drilling hole axis.
Offshore drilling the most according to claim 1 basal disc, is characterized in that, the telescopic pillar of at least three is distributed in probing
The outside in hole is, pillar is distributed on the point on drilling hole axis as the center of circle and on the circumference vertical with drilling hole axis.
Offshore drilling the most according to claim 1 basal disc, is characterized in that, pillar is identical plunger case.
Offshore drilling the most according to claim 4 basal disc, is characterized in that, the oil inlet and outlet of plunger case communicates.
Offshore drilling the most according to claim 4 basal disc, is characterized in that, the outer end of plunger case plunger is tapered.
Offshore drilling the most according to claim 4 basal disc, is characterized in that, the outer end of plunger case plunger is wedge shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410166195.7A CN103993860B (en) | 2014-04-24 | 2014-04-24 | A kind of offshore drilling basal disc |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410166195.7A CN103993860B (en) | 2014-04-24 | 2014-04-24 | A kind of offshore drilling basal disc |
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| CN103993860A CN103993860A (en) | 2014-08-20 |
| CN103993860B true CN103993860B (en) | 2016-08-24 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105587266A (en) * | 2015-12-23 | 2016-05-18 | 浙江海洋学院 | Drilling equipment for ship |
| CN105649535A (en) * | 2015-12-30 | 2016-06-08 | 浙江海洋学院 | Offshore drilling equipment |
| CN117626931B (en) * | 2023-12-18 | 2024-06-18 | 中国电建集团华东勘测设计研究院有限公司 | Self-elevating geological survey platform seabed base plate, retraction device and operation method |
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| US4435108A (en) * | 1981-08-11 | 1984-03-06 | Sedco, Inc. | Method of installing sub-sea templates |
| WO1996006260A1 (en) * | 1994-08-23 | 1996-02-29 | Oil Engineering Consultants Drilling A/S | Template construction for drilling subsea wells for oil and gas |
| US6325158B1 (en) * | 1997-11-03 | 2001-12-04 | Kongsberg Offshore A/S | Method and device for mounting of a seabed installation |
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| CN103993860A (en) | 2014-08-20 |
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