AU2019100232A4 - A new device to reduce vortex-induced vibration for marine drilling riser - Google Patents
A new device to reduce vortex-induced vibration for marine drilling riser Download PDFInfo
- Publication number
- AU2019100232A4 AU2019100232A4 AU2019100232A AU2019100232A AU2019100232A4 AU 2019100232 A4 AU2019100232 A4 AU 2019100232A4 AU 2019100232 A AU2019100232 A AU 2019100232A AU 2019100232 A AU2019100232 A AU 2019100232A AU 2019100232 A4 AU2019100232 A4 AU 2019100232A4
- Authority
- AU
- Australia
- Prior art keywords
- induced vibration
- marine drilling
- drilling riser
- new device
- reduce vortex
- 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.)
- Ceased
Links
- 238000005553 drilling Methods 0.000 title abstract description 6
- 238000000034 method Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/01—Risers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
- B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
- B63B21/502—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers by means of tension legs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
- B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
- B63B21/502—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers by means of tension legs
- B63B2021/504—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers by means of tension legs comprising suppressors for vortex induced vibrations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
- F15D1/00—Influencing flow of fluids
- F15D1/10—Influencing flow of fluids around bodies of solid material
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Earth Drilling (AREA)
Abstract
Abstract A device to reduce vortex-induced vibration by using four small piles around a main marine drilling riser. C20' 0 C, d C0 C4* Fig. 1 Fig. 2
Description
Due to the alternate vortex shedding and consequently the large amplitude lift fluctuation, the marine drilling riser generally suffer from undesirable Vortex-Induced Vibration (VIV), which may severely threat the safety of marine drilling riser in the ocean engineering. In order to reduce the VIV, many methods have been proposed including the active flow control, for example the rotationally oscillating cylinders, and the passive methods, such as the helical strake, splitter plate and rotating circular cylinder.
As far as the practical applications of drilling risers in deep water are concerned, the cylindrical risers are generally attached by several auxiliary lines, such as the choke and kill lines, blowout preventer (BOP) lines and rotary lines. These facilities can be referred to as control rods, i.e., the secondary, much smaller cylinders placed near the primary cylinder, which is expected to reduce the VIV by optimal arrangement. A new device is invent using those control rods to reduce vortex-induced vibration for marine drilling rise By using this device, the maximum reductions of the RMS lift force, mean drag force and the amplitude of VIV reach up to 100%, 40% and 70%,
Fig. 1 shows the plane sketch of this device. The primary riser denoted by CO, is located at the center of this device. Four identical small piles, i.e., the control rods are denoted by Cl, C2, C3 and C4.
Fig. 2 shows the three dimensional view of this device. Four small piles are placed around the main riser. A
Claims (2)
1. A device to reduce vortex-induced vibration by using four small piles around the main riser.
2. The diameters of the small piles are 0.24 times of the main riser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2019100232A AU2019100232A4 (en) | 2019-03-05 | 2019-03-05 | A new device to reduce vortex-induced vibration for marine drilling riser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2019100232A AU2019100232A4 (en) | 2019-03-05 | 2019-03-05 | A new device to reduce vortex-induced vibration for marine drilling riser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2019100232A4 true AU2019100232A4 (en) | 2019-04-18 |
Family
ID=66108066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2019100232A Ceased AU2019100232A4 (en) | 2019-03-05 | 2019-03-05 | A new device to reduce vortex-induced vibration for marine drilling riser |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU2019100232A4 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112966418A (en) * | 2021-03-11 | 2021-06-15 | 西南石油大学 | Method for analyzing power characteristics of marine natural gas hydrate exploitation riser |
-
2019
- 2019-03-05 AU AU2019100232A patent/AU2019100232A4/en not_active Ceased
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112966418A (en) * | 2021-03-11 | 2021-06-15 | 西南石油大学 | Method for analyzing power characteristics of marine natural gas hydrate exploitation riser |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FGI | Letters patent sealed or granted (innovation patent) | ||
| MK22 | Patent ceased section 143a(d), or expired - non payment of renewal fee or expiry |