IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0836803
(2001-04-17)
|
우선권정보 |
IT-TO2001A032 (2001-01-17) |
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
7 인용 특허 :
16 |
초록
▼
Boring unit for pile foundations presenting a tracked vehicle facing the mouth of a hole, a mast (5) which is supported by the tracked vehicle, a rotary table (6) which is slidingly mounted along the mast (5), and at least one excavation element (7) which is connected to the table (6) and which pres
Boring unit for pile foundations presenting a tracked vehicle facing the mouth of a hole, a mast (5) which is supported by the tracked vehicle, a rotary table (6) which is slidingly mounted along the mast (5), and at least one excavation element (7) which is connected to the table (6) and which presents a boring tool (8) at its own lower end. The boring unit may also include a handling device (11) which provides for moving the excavation element (7) and for moving further auxiliary excavation elements (19, 20) and which is also provided with a head (12) mounted on a top end of the mast (5) that is equipped with a hoist (13) and a central cable (14) which can be alternatively connected to the excavation element (7) via a drive unit (40) which is suitable for co-operating with the hoist (13) in order to rapidly move the auxiliary excavation elements.
대표청구항
▼
Boring unit for pile foundations presenting a tracked vehicle facing the mouth of a hole, a mast (5) which is supported by the tracked vehicle, a rotary table (6) which is slidingly mounted along the mast (5), and at least one excavation element (7) which is connected to the table (6) and which pres
Boring unit for pile foundations presenting a tracked vehicle facing the mouth of a hole, a mast (5) which is supported by the tracked vehicle, a rotary table (6) which is slidingly mounted along the mast (5), and at least one excavation element (7) which is connected to the table (6) and which presents a boring tool (8) at its own lower end. The boring unit may also include a handling device (11) which provides for moving the excavation element (7) and for moving further auxiliary excavation elements (19, 20) and which is also provided with a head (12) mounted on a top end of the mast (5) that is equipped with a hoist (13) and a central cable (14) which can be alternatively connected to the excavation element (7) via a drive unit (40) which is suitable for co-operating with the hoist (13) in order to rapidly move the auxiliary excavation elements. n the second density is lower than the first density. 5. The method of claim 4, wherein the second density is lower than the density of seawater and the first density is higher than the density of seawater. 6. The method of claim 5, wherein the second density is less than 8.6 PPG and the first density is greater than 8.6 PPG. 7. The method of claim 6, wherein the second density is 6.5 PPG and the first density is 12.5 PPG. 8. The method of claim 1, wherein the second density is lower than the density of seawater. 9. The method of claim 1, wherein the second density is lower than 8.6 PPG. 10. The method of claim 9, wherein the second density is 6.5 PPG. 11. The method of claim 1, wherein the first fluid is introduced into the drill tube at a first flow rate and the second fluid is introduced into the riser at a second flow rate. 12. The method of claim 11, wherein the first flow rate is slower than the second flow rate. 13. The method of claim 12, wherein the density of the combination fluid is determined by the combined densities of the first fluid and the second fluid and the first and second flow rates. 14. An apparatus for generating at the surface a riser fluid for use in a subsea well, said riser fluid having a density different from the drilling fluid, comprising: a. a drilling platform; b. a wellhead on the seabed; c. a drilling string connecting the platform to the well and including a drillstem, drill tube and casing for defining the riser; d. charging lines associated with the riser; e. a source of drilling fluid on the platform, said drilling fluid of a first density for providing drilling fluid to be introduced into the drill tube; and f. a source of additional fluid on the platform, said additional fluid of a second density for providing said additional fluid to be introduced into the charging lines, whereby the first fluid and the second fluid are combined in the riser for producing a combined fluid having a density different from the density of the drilling fluid; and g. a separator on the platform for separating the combined fluid into its components as the combined fluid is discharged from the riser. 15. The apparatus of claim 14, wherein said first density is greater than said second density. 16. The apparatus of claim 14, further including a separator at the platform for separating the drilling fluid from the additional fluid. 17. The apparatus of claim 16, wherein the separator comprises a centrifuge system. 18. The apparatus of claim 14, further including a pump for pumping the drill fluid into the drill tube at a first rate of flow and a pump for pumping the additional fluid into the charging lines at a second rate of flow. 19. The apparatus of claim 18, wherein the first rate of flow is slower than the second rate of t al., 137/556; US-5628489, 19970500, Woodman, 251/029; US-5899277, 19990500, Eisenbeiss et al., 169/046; US-6000473, 19991200, Reilly, 169/017; US-6029749, 20000200, Reilly et al., 169/017; US-6068057, 20000500, Beukema, 169/022; US-6138766, 20001000, Finnerty et al., 169/014; US-6158520, 20001200, Reilly et al., 169/017; US-6293348, 20010900, Reilly, 169/016; US-6378616, 20020400, Reilly, 169/017
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