CN103993860A - Offshore drilling base plate - Google Patents
Offshore drilling base plate Download PDFInfo
- Publication number
- CN103993860A CN103993860A CN201410166195.7A CN201410166195A CN103993860A CN 103993860 A CN103993860 A CN 103993860A CN 201410166195 A CN201410166195 A CN 201410166195A CN 103993860 A CN103993860 A CN 103993860A
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- basal disc
- probing
- axis
- lifting
- axially bored
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Abstract
The invention relates to an offshore drilling base plate which is a deep sea offshore drilling base plate capable of automatically keeping the verticality of the axis of a drilling hole in the descending and placing processes. The offshore drilling base plate comprises a base plate body with the drilling hole, a supporting pillar arranged under the base plate body and a lifting device arranged on the base plate body, wherein at least three stretchable supporting pillars are distributed on the outer side of the drilling hole, and the axes of the supporting pillars are parallel with the axis of the drilling hole; the lifting device comprises a steel wire rope, two lifting pulleys and at least one guide pulley, wherein the lifting pulleys and the guide pulleys are all fixed pulleys located on the outer side of the drilling hole, the axes of the two lifting pulleys on the outer side are orthogonal with a cylindrical face with the axis of the drilling hole as the axis, the axes of the guide pulleys are parallel with the axis of the drilling hole, and when the steel wire rope penetrates through the lifting pulleys and the guide pulleys for lifting, the axis of the vertical part of the steel wire rope and the axis of the drilling hole are coplanar; when the two ends of the steel wire rope lift the offshore drilling base plate, the gravity center of the offshore drilling base plate is located on the axis of the drilling hole.
Description
Technical field
This technology relates to a kind of off-shore boring basal disc, is a kind of deep seafloor probing basal disc that can automatically keep drilling the vertical state of axially bored line in the time transferring, lay.
Background technology
Due to the needs of marine resources development, require (300 meters to 3000 meters) seabeds, deep-sea (in the time that underwater gradient is less than 25 °) to drill.Before probing, a probing basal disc must be transferred to seabed, carry out drilling operation by probing basal disc probing position, hole.Especially while laying in decentralization process, be difficult for keeping probing axially bored line in vertical state, due to the defect of boom hoisting, also can bring interference for drilling operation; Too dark because of water, personnel cannot dive directly complete and transfer operation to seabed.
Summary of the invention
The object of this technology is to provide a kind ofly especially can keep probing axially bored line vertical state in the time transferring in the time laying, for the glitch-free off-shore boring's basal disc of drilling operation.
The object of this technology is to be achieved through the following technical solutions:
This off-shore boring basal disc, comprises the basal disc body that is provided with probing hole, is arranged on the pillar under basal disc body, is arranged on the boom hoisting on basal disc body; At least three telescopic pillars are distributed in the outside in probing hole, and pillar axes is parallel to probing axially bored line; Boom hoisting comprises wire rope, two lifting pulleys and at least one leading block; Lifting pulley and leading block are all the fixed pulley that is positioned at outside, probing hole, two lifting pulley axis in outside are all vertical with probing axially bored line, leading block axis is parallel with probing axially bored line, when steel wire penetrating lifting pulley and leading block lifting, the axis of wire rope vertical portion is coplanar with probing axially bored line; When off-shore boring's basal disc is lifted by crane at wire rope two ends, the center of gravity of off-shore boring's basal disc is positioned on probing axially bored line.
The beneficial effect of this technology is;
Lift by crane by two fixed pulleys with wire rope, wire rope projection is positioned at the outside in probing hole, can not cause interference to drilling operation.
The center of gravity of off-shore boring's basal disc is positioned on probing axially bored line, and far below two Heave Heres, basal disc automatically keeps all the time probing axially bored line in vertical state under the effect of two identical pulling force.
Adopt telescopic pillar, while laying, length and the sea-floor relief of automatically adjusting each pillar adapt, to ensure drilling axially bored line in vertical state.
This off-shore boring's basal disc is in the time transferring, and two lifting ropes not necessarily equate for the moment of off-shore boring's basal disc, is easy to be subject to the impact of ocean current etc.; This off-shore boring's basal disc in use, can run into because each pillar is unreliable with respect to arm of force pillar not of uniform size, the each lower end seabed interaction of probing axially bored line, and then bring off-shore boring's basal disc to lay the desirable state of rear difficult maintenance; Adjust the problems such as the length difficulty of each pillar is larger, need to improve this off-shore boring's basal disc.
One of improving, is the improvement to wire rope Heave Here:
When steel wire penetrating lifting pulley and leading block lifting, the axis of wire rope vertical portion equates to the distance of probing axially bored line.Make the wire rope projection of vertical portion be positioned at two symmetric points, two lifting ropes equate for the moment of off-shore boring's basal disc.
Two of improvement is improvement of the structure of the setting position on basal disc body and pillar to pillar:
The outside that at least three telescopic pillars are distributed in probing hole is, it is on the center of circle and the circumference vertical with probing axially bored line that pillar is distributed on to drill point on axially bored line.This improvement, makes off-shore boring's basal disc in use, and each pillar equates with respect to the arm of force of probing axially bored line, improves stability.
Pillar is identical plunger case; The oil inlet and outlet of plunger case communicates; Tapered or the wedge shape in the outer end of plunger case plunger.These improvement, the plunger case that oil inlet and outlet communicates forms a space hydraulic spring grease cup, if plunger case plunger stressed large (being that plunger contacts with higher position, seabed), plunger retraction, hydraulic oil is discharged to the stressed less or plunger case that do not stress, make the plunger of respective post plug cylinder overhanging, the sea-floor relief rising and falling automatically to adapt to height, keeps probing axially bored line in vertical state; The plunger that uses the plunger case of the tapered or wedge shape in outer end, overcomes the resistance of mud for plunger, makes plunger be easy to insert seabed, reliably contacts with seabed, improves stability.
Brief description of the drawings
Fig. 1 is the front view of this off-shore boring basal disc
Fig. 2 is the left view of this off-shore boring basal disc
Fig. 3 is the force analysis figure of this off-shore boring basal disc in equilibrium state
Fig. 4 is that this off-shore boring basal disc is subject to External Force Acting and the force analysis figure of right low left high state
Fig. 5 is that this off-shore boring basal disc is subject to External Force Acting and the force analysis figure of the left low state of right height
Detailed description of the invention
Below in conjunction with accompanying drawing, this technology is illustrated:
Referring to the off-shore boring's basal disc shown in Fig. 1, Fig. 2, this off-shore boring basal disc is mainly made up of basal disc body 1, pillar and boom hoisting.
This off-shore boring basal disc, comprises the basal disc body 1 that is provided with probing hole, is arranged on the pillar under basal disc body 1, is arranged on the boom hoisting on basal disc body 1; At least three telescopic pillars are distributed in the outside in probing hole 10, and pillar axes is parallel to probing hole 10 axis; Boom hoisting comprises wire rope, two lifting pulleys 6 and at least one leading block 9; Lifting pulley 6 and leading block 9 are all the fixed pulley that is positioned at probing 10 outsides, hole, two lifting pulley 6 axis in outside are all with orthogonal as the face of cylinder of axis taking the axis in probing hole 10, leading block 9 axis are parallel with probing hole 10 axis, when steel wire penetrating lifting pulley 6 and leading block 9 lift by crane, the axis of wire rope vertical portion is coplanar with probing hole 10 axis; When off-shore boring's basal disc is lifted by crane at wire rope two ends, the center of gravity of off-shore boring's basal disc is positioned on 10 axis of probing hole.
In fact:
In basal disc body 1, offer probing hole 10, basal disc body 1 is that an axis taking probing hole 10 is as axis, the both ends of the surface cylinder vertical with its axis.
Pillar is arranged on below basal disc body 1, and the quantity of pillar is at least three, generally chooses six (are illustrated as six, are regular hexagon and distribute).The concrete structure of pillar adopts identical plunger case; The set-up mode of single plunger case on basal disc body 1 is: plunger case cylinder body 3 is fixed in basal disc body 1, and cylinder body 3 axis are parallel with probing hole 10 axis, and plunger 4 moves and is arranged in cylinder body 3; The deployment mode of multiple plunger cases on basal disc body 1 is: it is on the center of circle and the circumference vertical with probing hole 10 axis that plunger case is distributed on to drill point on 10 axis of hole; Plunger case is identical with respect to the height of basal disc body 1 upper surface; The oil inlet and outlet 2 of multiple plunger cases communicated successively by airtight annular communicating pipe 5, and annular is arranged on the outside in probing hole 10 communicating pipe 5; Tapered or the wedge shape in the outer end of plunger 4.
Boom hoisting comprises that shown in 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 that is positioned at probing 10 outsides, hole; Two lifting pulley 6 axis in outside are all with orthogonal as the face of cylinder of axis taking probing hole 10 axis, and leading block 9 axis are parallel with probing hole 10 axis; When steel wire penetrating lifting pulley 6 and leading block 9 lift by crane, vertical portion is lifting rope 7, part between leading block 9 and lifting pulley 6 is guide rope 8, and now the axis of lifting rope 7 is coplanar with probing hole 10 axis, and the axis of lifting rope 7 equates to the distance of probing hole 10 axis.That is to say, when steel wire penetrating lifting pulley 6 and leading block 9 lift by crane, the projection of lifting rope 7 on basal disc body 1 is with respect to the diameter shaft symmetry in probing hole 10.When steel wire penetrating lifting pulley 6 and leading block 9 lift by crane, guide rope 8 is away from probing hole 10.
When off-shore boring's basal disc is lifted by crane at wire rope two ends, the center of gravity of off-shore boring's basal disc is positioned on 10 axis of probing hole.According to diagram, in fact, the center of gravity of probing basal disc is positioned at the below of basal disc body 1 upper surface.
Below in conjunction with accompanying drawing, describe in detail thisly while transferring, lay off-shore boring's basal disc, automatically keep vertical principle, the method for probing axially bored line.
Shown in Figure 3, probing axially bored line be vertically off-shore boring's basal disc in the time of equilibrium state, F is the pulling force of lifting rope for off-shore boring's basal disc, C is the center of gravity of off-shore boring's basal disc, G is the gravity that off-shore boring's basal disc is subject to.:
M=F﹡L﹡Conα-?F﹡L﹡Conα
=F﹡AD-F﹡DB
=0
Shown in Figure 4, off-shore boring's basal disc is subject to External Force Acting and when right low left high:
M=?F﹡L﹡Con(α+β)-F﹡L﹡Con(α-β)
=F﹡AE-?F﹡GB
＜0
Off-shore boring's basal disc is subject to turning anticlockwise moment loading, will be turned back to equilibrium state.
Shown in Figure 5, off-shore boring's basal disc is subject to External Force Acting and right height is left when low:
M=?F﹡L﹡Con(α-β)-?F﹡L﹡Con(α+β)
=?F﹡AI-F﹡HB
＞0
Off-shore boring's basal disc is subject to clockwise flywheel moment effect, will be turned back to equilibrium state.
While transferring, adopt single 6500 meters without lay winding wire ropes, wire rope two two ends are around two difference independently on reel, two winches can be worked simultaneously, also can work alone, for subsequent use each other, in meeting 3000 meters of degree of depth drilling operations requirements, also improve security reliability.
In installation course, plunger case original state is that six plungers respectively stretch out half.Rigidly connect while contacting seabed when off-shore boring's basal disc falls to put to plunger, the plunger that contacts at first seabed inserts seabed, and because of stressed inwardly retraction, hydraulic oil, by flowing to not stressed or stressed less plunger case communicating pipe, makes its plunger overhanging; Along with off-shore boring's basal disc sinks gradually, six plungers of off-shore boring's basal disc are bearing equal power all the time; Although submarine relief injustice, basal disc off-shore boring flatly slowly sits at the end, keeps probing axially bored line vertical.
The beneficial effect of this technology is:
Lift by crane by two fixed pulleys with wire rope, wire rope projection is positioned at the outside in probing hole, and guide rope is away from probing hole, and annular is also arranged on the outside in probing hole communicating pipe, can not cause interference to drilling operation.
The center of gravity of off-shore boring's basal disc is positioned on probing axially bored line, the below of two Heave Heres, and basal disc automatically keeps all the time probing axially bored line in vertical state under the effect of two identical pulling force.
Adopt telescopic pillar, while laying, length and the sea-floor relief of automatically adjusting each pillar adapt, to ensure drilling axially bored line in vertical state.
Adopt independently winch of two difference, for subsequent use each other, improve security reliability.
Claims (7)
1. off-shore boring's basal disc, comprises the basal disc body that is provided with probing hole, is arranged on the pillar under basal disc body, be arranged on the boom hoisting on basal disc body, it is characterized in that, at least three telescopic pillars are distributed in the outside in probing hole, and pillar axes is parallel to probing axially bored line; Boom hoisting comprises wire rope, two lifting pulleys and at least one leading block; Lifting pulley and leading block are all the fixed pulley that is positioned at outside, probing hole, two lifting pulley axis in outside are all vertical with probing axially bored line, leading block axis is parallel with probing axially bored line, when steel wire penetrating lifting pulley and leading block lifting, the axis of wire rope vertical portion is coplanar with probing axially bored line; When off-shore boring's basal disc is lifted by crane at wire rope two ends, the center of gravity of off-shore boring's basal disc is positioned on probing axially bored line.
2. off-shore boring according to claim 1 basal disc, is characterized in that, when steel wire penetrating lifting pulley and leading block lifting, the axis of wire rope vertical portion equates to the distance of probing axially bored line.
3. off-shore boring according to claim 1 basal disc, is characterized in that, the outside that at least three telescopic pillars are distributed in probing hole is, it is on the center of circle and the circumference vertical with probing axially bored line that pillar is distributed on to drill point on axially bored line.
4. off-shore boring according to claim 1 basal disc, is characterized in that, pillar is identical plunger case.
5. off-shore boring according to claim 4 basal disc, is characterized in that, the oil inlet and outlet of plunger case communicates.
6. off-shore boring according to claim 4 basal disc, is characterized in that, the outer end of plunger case plunger is tapered.
7. off-shore boring according to claim 4 basal disc, is characterized in that, the outer end of plunger case plunger is wedge shape.
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 |
Applications Claiming Priority (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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| Publication Number | Publication Date |
|---|---|
| CN103993860A true CN103993860A (en) | 2014-08-20 |
| CN103993860B CN103993860B (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410166195.7A Active CN103993860B (en) | 2014-04-24 | 2014-04-24 | A kind of offshore drilling basal disc |
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Cited By (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 |
| CN117626931A (en) * | 2023-12-18 | 2024-03-01 | 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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| US3788396A (en) * | 1971-03-10 | 1974-01-29 | Shell Oil Co | Well re-entry tool with bumperhead |
| US4317488A (en) * | 1979-02-15 | 1982-03-02 | The British National Oil Corporation | Apparatus for use in placing a submarine structure on the sea bed alongside an underwater well and method of drilling a plurality of closely spaced underwater wells |
| US4435108A (en) * | 1981-08-11 | 1984-03-06 | Sedco, Inc. | Method of installing sub-sea templates |
| US4830542A (en) * | 1982-10-05 | 1989-05-16 | Mobil Oil Corporation | Subsea template leveling wafer and leveling method |
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Cited By (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 |
| CN117626931A (en) * | 2023-12-18 | 2024-03-01 | 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103993860B (en) | 2016-08-24 |
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