WO2013000764A2 - A fluid diverter system for a drilling facility. - Google Patents
A fluid diverter system for a drilling facility. Download PDFInfo
- Publication number
- WO2013000764A2 WO2013000764A2 PCT/EP2012/061711 EP2012061711W WO2013000764A2 WO 2013000764 A2 WO2013000764 A2 WO 2013000764A2 EP 2012061711 W EP2012061711 W EP 2012061711W WO 2013000764 A2 WO2013000764 A2 WO 2013000764A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- diverter
- mgs
- valve
- fluid
- gas
- Prior art date
Links
- 239000012530 fluid Substances 0.000 title claims abstract description 50
- 238000005553 drilling Methods 0.000 title claims abstract description 34
- 239000007788 liquid Substances 0.000 claims description 37
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000005484 gravity Effects 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 69
- 229930195733 hydrocarbon Natural products 0.000 description 7
- 150000002430 hydrocarbons Chemical class 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 6
- 238000005755 formation reaction Methods 0.000 description 6
- 230000003068 static effect Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 238000011835 investigation Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- JZUFKLXOESDKRF-UHFFFAOYSA-N Chlorothiazide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC2=C1NCNS2(=O)=O JZUFKLXOESDKRF-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000008186 active pharmaceutical agent Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000007872 degassing Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000002151 riboflavin Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
- 239000003643 water by type Substances 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/001—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor specially adapted for underwater drilling
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/01—Arrangements for handling drilling fluids or cuttings outside the borehole, e.g. mud boxes
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/06—Arrangements for treating drilling fluids outside the borehole
- E21B21/063—Arrangements for treating drilling fluids outside the borehole by separating components
- E21B21/067—Separating gases from drilling fluids
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/08—Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/12—Underwater drilling
Definitions
- the invention relates to the extraction of hydrocarbons from subsea, subterranean, wells. More specifically, the invention relates to a system for handling fluids from a wellbore, as specified in the preamble of the independent claim 1.
- BOP Blow-Out Preventer
- a kick is a situation where hydrocarbons, water, or other formation fluid enters the wellbore during drilling, because the pressure exerted by the column of drilling fluid is not great enough to overcome the pressure exerted by the fluids in the formation being drilled.
- Hydrocarbons in liquid or dense phase are much less compressible than hydrocarbons in gas phase.
- a typical natural gas will go into dense phase if the pressure is above 153,5 bara (Cricondenbar) and temperature between - 29 °C (Critical temperature) and + 99 °C (Cricondentherm). As the gas (in liquid or dense phase) travels up the marine riser, the static pressure is reduced, and the gas goes from liquid/dense phase to gas/vapour phase and expands several hundred times.
- MCS mud/gas separator
- an extra high level trip in the MGS and/or high pressure trip in the diverter housing has been installed to automatically open the diverter overboard line on high level in MGS or high pressure in the diverter housing.
- the dangerous part is that the available time in which to take the appropriate action, i.e. before the vent line of the MGS is completely filled, is very limited.
- the mud returning from the riser is in a highly accelerating mode and the time available for opening the diverter valve is very limited.
- a slug of heavy mud accelerating up the MGS vent line followed by a two phase flow and finally a large gas release will create an increased pressure in the diverter housing and possible leakage in the slip joint resulting in gas being release under the rig at the slip joint connection.
- a worst case scenario of such an event is the Deepwater Horizon disaster.
- a fluid diverter system for a drilling facility, comprising a diverter housing fluidly connected to a tubular extending to a subsea well; the diverter housing comprising a movable diverter element for closing off the diverter housing, a first fluid conduit connected to a mud system and comprising a first valve, at least one second fluid conduit leading from an outlet in the diverter housing to an outlet at an overboard location and comprising a second valve, and a third fluid conduit connected to a mud/gas separator (MGS) and comprising a third valve, characterized in that the MGS is arranged below the outlet of the diverter line, whereby riser fluids may be fed from the diverter housing to the MGS by means of gravity flow.
- MGS mud/gas separator
- an inlet into the MGS from the third fluid conduit is arranged a vertical distance below the outlet from the diverter housing.
- the MGS is preferably fluidly connected to mud treatment facilities via a liquid seal.
- the MGS further comprises a first pressure transmitter
- the liquid seal comprises second and third pressure transmitters, arranged a vertical distance apart, and a monitoring and control system, whereby the liquid seal density may be determined.
- the third valve is interlocked with a level indicator for the liquid seal.
- the second fluid conduit slopes upwards such that its outlet is at a higher elevation that its inlet.
- the diverter valve on a leeward side of the drilling facility is configured to be open before the diverter element closes around the tubular.
- the invention allows an MGS to receive riser fluid in a safer way than with the known systems.
- riser fluids are routed to the MGS by means of gravity flow, allowing the diverter valve to the leeward side being open and diverter element closed at the same time.
- This is solved by installing a MGS at a lower level than the divert line outlets.
- the gas is vented safely overboard while the drilling fluid is returned to the mud system.
- this MGS may be a second MGS and especially designated for taking the fluids from the marine riser. It is thus provided that any gas that may have entered the riser after the BOP is shut-in on a kick is vented safely overboard and at the same time mud can be returned to the system in a safe way.
- Drilled gas can be routed safely to the MGS separator from the diverter keeping the diverter element closed preventing gas breaking out through the diverter housing and escaping on drill floor.
- degasser mode When running the system in degasser mode, it will allow the gas cut mud to go through a two stage separating process.
- the MGS will take out the gas that normally would escape to drill floor and the shakers, while the second stage is done by the degassers in the mud treatment tanks. Degassers are used to separate entrained gas bubbles in the drilling fluid which are too small to be removed by the MGS.
- Figure 1 is a simplified schematic representation of the BOP rams, diverter element and valves position according to the prior art, also representing a typical arrangement on drill ships or semi- submersible drilling rigs. The figure is copied from page 1 14 of the BP public report entitled "Deepwater Horizon Accident Investigation Report” (published September 8 th , 2010);
- Figure 2 is a simplified schematic representation of the invented system
- Figure 3 is a simplified schematic representation of an alternative embodiment of the invented system.
- Figure 4 is a simplified schematic representation of an alternative embodiment of the invented system, used in a Hydril ® Marine Riser Diverter system.
- a drill string 3 extends between a topsides drill floor (not shown) and a seabed BOP (not shown), extending in a telescopic so-called “slip-joint" 42 and a marine riser 47 thus defining an annulus 43.
- This arrangement is well known in the art, and need therefore not be described further.
- a diverter housing 15 is arranged in fluid communication with the annulus 43 and a diverter line 20 which extends from an outlet 46 in the diverter housing and to an outlet 50 at an overboard location.
- a diverter housing normally has two diverter lines, extending to the port and starboard sides, respectively, of the vessel, such that the diverter line on the leeward side may be used, as explained above. For illustration purposes, however, only one diverter line is shown.
- a diverter valve 1 is arranged in each diverter line 20. In the figures, the diverter valve 1 is shown in an open state (white typeface).
- the diverter housing 15 is also connected to the vessel's mud system (not shown) via a flow line 44, the flow in which is controlled by a flow line valve 5.
- the flow line valve 5 is shown in a closed state (grey typeface).
- a diverter element 2 is arranged to close around the drill string 3, and is in figures shown in a closed state.
- Reference number 14 indicated the fluid level in the diverter housing 15.
- the diverter housing 15 is fluidly connected to an MGS 13 via an MGS line 16.
- the flow in the MGS line 16 is controlled by an MGS valve 4, which in the figures is shown in an open state (white typeface).
- a vent line 21 extends from the MGS. Normally, this vent line 21 extends to a distance (typically 4 meters) above the top of the derrick (not shown).
- the MGS is furthermore fluidly connected to the shakers 24 via an outlet line 45, and the shaker 24 feeds into a sand trap 18 and a degasser 19, in a known fashion.
- the outlet line 45 effectively forms a liquid seal 6 by running a downward distance hi before it loops back up to a level A which is higher than the connection point of the outlet line to the MGS 13.
- an inspection and draining device 22 is arranged (only schematically illustrated), by means of which any blockage or cuttings may be monitored and removed from the line.
- the MGS 13 is arranged at level which is lower than the diverter housing, such that riser fluids flow in the MGS line 16 by the influence of gravity. More specifically, the MGS line inlet 17 is at a lower level than the diverter line 20 outlet from the diverter housing, and the outlet 50 of the diverter line, and the liquid level in the diverter housing. In figure 2, these height differences are indicated by the reference letters 3 ⁇ 42 and 3 ⁇ 44, respectively. With this arrangement, any gas that may have entered the riser after the BOP has been shut-in on a kick, is vented safely overboard and at the same time mud can be returned to the system in a safe way.
- Figure 3 shows an alternative embodiment, in which the diverter line(s) 20' is (are) sloping upwards to an outlet 50 and thus may be partly filled with liquid, since the outlet to the MGS line 16 is at the same or at a higher level than the outlet(s) to the diverter line(s) 20' . If the outlet to the MGS line 16 is kept at a higher level than the outlet(s) 46' to the diverter line(s) 20 ', a liquid seal will form in the diverter line reducing the amount of gas being vented in the diverter line when the system is run in "Degasser mode". This alternative provides a more compact arrangement and will thus require less height between the drill floor level and the shaker deck, compared to the embodiment shown in figure 2.
- the diverter line 20 ' preferably comprises heat tracing (not shown) or similar heating means to prevent rain water from freezing and hence blocking the diverter line.
- Figure 4 shows yet an alternative embodiment, where the invented system is used in a Hydril ® Marine Riser Diverter system 15 ', which is known per se. In this alternative there are no external diverter valves, but only a flow selector 48 routing the diverted flow to the leeward diverter line 20' .
- the outlet to the MGS line 16 is taken from the diverter line before the flow selector, and the diverter lines 20' are sloping upwards to the outlet as in figure 3.
- the flow selector 48 may be of a known type, e.g. such as the Hydril ® Pressure Control Flow Selector.
- a vacuum breaker line 23 is fluidly connected to the outlet line 45, in order to avoid siphon effects emptying the outlet line 45.
- a first pressure transmitter 9 is arranged in the upper region of the MGS 13, and second and third pressure transmitters 7, 8 are arranged in the lower region of the liquid seal 6.
- the second 7 and third 8 pressure transmitters are arranged with a vertical spacing h 3 , thus facilitating the calculation of the liquid seal density.
- a liquid level indicator 10 receives signals (dotted lines) from the pressure transmitters 7, 8, 9 and is also connected to a driller's control system DCS.
- the diverter valve 1 , diverter element 2, MGS valve 4 and flow line valve 5 are all interconnected (control and activation lines not shown) via the DCS/BOP control system. Such control systems are well known, and need therefore not be described further.
- Reference number 1 1 indicates a high level reading HH in the MGS 13, and reference number 12 indicates a low level reading LL in the liquid seal 6.
- the invented system is useful in the following modes: a) Diverter mode, b) Degasser mode, and c) Trip gas mode.
- the Deepwater Horizon disaster is an ultimate example of this operational mode, and what potential disaster that can happen if this is not routed safely overboard.
- BP's publication, "Deepwater Horizon Accident Investigation Report", (published September 8 th , 2010), indicates that hydrocarbons entered the riser at approximately 21 :38 hours (page 98) and the first BOP ram was shut-in at approximately 21 :41. I.e. the BOP was actuated at approximately 3 minutes too late to stop hydrocarbons entering into the riser. The report also shows that the first ram did not seal 100% and a second ram was activated at approximately 21 :46 (Table 2, page 103). At approximately 21 :47 the BOP was 100%) sealed.
- a significant feature of the invention is that the diverter valves are interlocked with the diverter valve and diverter element such that the diverter valve 1 which is being used (i.e. on the leeward side) is open before the diverter element 2 closes around the drill string 3. At the same time, mud may be allowed to return safely to the MGS 13 by gravity through MGS valve 4 and line 16.
- the invented system complies with the "ABS GUIDE FOR THE CLASSIFICATION OF DRILLING SYSTEMS 201 1", which in section 3.7.3 (Control Systems for Diverters) states:
- control systems are to have interlocks so that the diverter valve opens before the annular element closes around the drill string.
- the invented system also complies with "DNV-OS-E101 DRILLING PLANT, October 2009", which in chapter 2, section 5 (303 Control and monitoring, item .2.) states:
- the diverter control system shall be equipped with an interlock to ensure that the valve in the diverter pipe which leads out to the leeward side is opened before the diverter closes around the drilling equipment.
- a first step to prepare for a "riser blow-out” is to check that the liquid seal 6 in the MGS is filled up.
- Mud filling means (not shown) for filling the liquid seal 6 is provided.
- the liquid seal 6 is fitted with the two pressure transmitters 7, 8 described above, located near the bottom of the liquid seal 6 and at a vertical distance 13 ⁇ 4 apart in order to calculate fluid density in the seal.
- a suitable value for 13 ⁇ 4 is 0.5 meter.
- the liquid seal integrity is to be corrected against the reading from the first pressure transmitter 9, by the control system DCS in order to get a true reading of the liquid seal integrity (i.e. level indication), provided by the level indicator 10 also when gases are being vented out.
- the MGS valve 4 will close on high level 1 1 in the MGS 13 or low level 12 in the liquid seal 6.
- the MGS valve 4 can be opened and the level in the diverter housing 14 be drained down to a level below the outlet to the diverter valve 1 and the outlet to the flow line valve 5. Confirmation that the level 14 has been drained down is obtained by observing the flow in flow line 44 going down to zero.
- a level transmitter (not shown) can be mounted in the diverter housing 15 in addition.
- the MGS line 16 from the diverter housing 15 to the MGS 13 is preferably sized for maximum 80% of total degasser capacity, in order not to exceed the capacity of the MGS and the downstream sand trap 18.
- the degasser (not shown) in the degasser tank 19 can either be of centrifugal or vacuum type..
- a large capacity MGS line 16 will not avoid drilling fluid being disposed to sea in the event of a "riser blow-out"; it will only reduce the amount being disposed to sea in a safe manner avoiding gas breaking out of the drilling fluid being disposed to drill floor, but safely being vented overboard.
- Sizing criteria for the MGS line 16 will typically be in the order of maximum 1000 to 1500 gpm.
- the MGS line 16 is preferably sized for pipe running liquid full and the driving force will be the total available static pressure head between the level 14 in the diverter housing 15 and the inlet elevation of the MGS inlet 17, shown as .4 in figure 2 and figure 3.
- the outlet of the diverter housing 15 and the MGS valve 4 should have the next larger pipe diameter compared to pipe diameter for the MGS line 16, for the first ten pipe diameter lengths (for example, if the pipe diameter is 0.25 meter (DN250), then this diameter is to be used in the first 2.5 meters before reducing pipe diameter to 0.2 meter (DN200)).
- MGS line 16 is running full of liquid.
- the total capacity of the MGS line 16 will depend of the line size and the total available static pressure head, depending on the layout. Typical values for .4, i.e. difference in elevation between the level 14 in the diverter housing and the elevation of the MGS inlet 17, are between 2 and 5 meters.
- the MGS 13 will overfill but the MGS vent line 21 will not, since the diverter valve 1 is open. In this case the MGS valve 4 will close as an extra level of safety on HH level 1 1 and to prevent further riser fluids being diverted to the blocked MGS 13.
- the height hi of the liquid seal 6 should be sized to prevent gas blow-by to the treatment tanks.
- a minimum liquid seal of hi 6 meters (20 ft) is recommended for drill ships or semi-submersible drilling rigs operating on deep water.
- the maximum blow-by case to be considered should be based on the peak gas flow rate from the Deepwater Horizon accident of 165 mmscfd (approx. 200 000 Sm3/h) (c.f. figure 1 on page 1 13 in BP public report "Deepwater Horizon Accident Investigation Report", (published September 8 th , 2010)).
- the gas peak flow rate will be vented proportionally between the diverter line 20 and the MGS vent line 21 via the MGS line 16. Line size of diverter line 20 and MGS vent line 21 to be set to keep backpressure in MGS 13 below an acceptable level to prevent gas blow-by to the shakers 24.
- diverter line 20 and the MGS vent line 21 are sized to prevent gas blow-by to the treatment tanks, an extra level of safety is built in to automatically close the MGS valve 4 on LL level 12 if the integrity of the liquid seal 6 are lost for some reason.
- the liquid seal top to be fitted with a vacuum breaker 21 as described above.
- Drilled Gas Even though the hydrostatic pressure exerted by the mud column is greater then the formation pressure, gas showing on the surface by this mechanism always happens. It is not practicable to increase mud weight sufficiently to make it disappear.
- the drilling should stop and gas cut mud should be circulated at a reduced rate through the MGS valve 4 and via the MGS 13 to the degasser tank 19, in a two stage separating process. In this way the entire mud volume in the annulus 43 including the marine riser can be degassed until it reaches an acceptable level prior to drilling ahead.
- the diverter element 2 can be closed after the level 14 in the diverter 15 has been drained down through the MGS valve 4, and the diverter valve 1 has been opened. In this way the gas from the gas cut mud can safely be vented overboard away from drill floor and the rig.
- the important embodiment of the invention is this degassing of the gas cut mud can be run in a two stage separating process without pressurising the diverter housing 15 and to jeopardise getting in conflict with the ABS GUIDE FOR THE CLASSIFICATION OF DRILLING SYSTEMS - 201 1 and DNV standard DNV-OS-E101.
- Trip gas is caused by swabbing effect while tripping out of the hole. Gas will be seen at the surface while circulating "bottom up” after tripping back in the hole again.
- the invention can be used for circulating out trip gas by opening the MGS valve 4 and diverter valve 1 have been opened allowing the diverter element 2 to be closed.
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- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
- Branch Pipes, Bends, And The Like (AREA)
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/129,452 US9163466B2 (en) | 2011-06-27 | 2012-06-19 | Fluid diverter system for a drilling facility |
BR112013033437-1A BR112013033437B1 (en) | 2011-06-27 | 2012-06-19 | fluid diverter system for a drilling installation |
AU2012278025A AU2012278025B2 (en) | 2011-06-27 | 2012-06-19 | A fluid diverter system for a drilling facility |
CA2839620A CA2839620A1 (en) | 2011-06-27 | 2012-06-19 | A fluid diverter system for a drilling facility |
CN201280032299.8A CN103649452B (en) | 2011-06-27 | 2012-06-19 | Fluid diverter system for drilling equipment |
EP12727884.4A EP2723969B1 (en) | 2011-06-27 | 2012-06-19 | A fluid diverter system for a drilling facility. |
KR1020147002338A KR20140051274A (en) | 2011-06-27 | 2012-06-19 | A fluid diverter system for a drilling facility |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO20110918 | 2011-06-27 | ||
NO20110918A NO20110918A1 (en) | 2011-06-27 | 2011-06-27 | Fluid diverter system for a drilling device |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2013000764A2 true WO2013000764A2 (en) | 2013-01-03 |
WO2013000764A3 WO2013000764A3 (en) | 2013-06-13 |
Family
ID=46317419
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2012/061711 WO2013000764A2 (en) | 2011-06-27 | 2012-06-19 | A fluid diverter system for a drilling facility. |
Country Status (9)
Country | Link |
---|---|
US (1) | US9163466B2 (en) |
EP (1) | EP2723969B1 (en) |
KR (1) | KR20140051274A (en) |
CN (1) | CN103649452B (en) |
AU (1) | AU2012278025B2 (en) |
BR (1) | BR112013033437B1 (en) |
CA (1) | CA2839620A1 (en) |
NO (1) | NO20110918A1 (en) |
WO (1) | WO2013000764A2 (en) |
Cited By (4)
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---|---|---|---|---|
US9500053B2 (en) | 2013-12-17 | 2016-11-22 | Managed Pressure Operations Pte. Ltd. | Drilling system and method of operating a drilling system |
US10435966B2 (en) | 2013-12-17 | 2019-10-08 | Managed Pressure Operations Pte Ltd | Apparatus and method for degassing drilling fluids |
GB2572827A (en) * | 2018-04-15 | 2019-10-16 | Ramsay French Frank | Mud gas separator design which prevents gas from being discharged into shaker and mud pit rooms |
CN113669050A (en) * | 2021-09-02 | 2021-11-19 | 中国石油大学(北京) | Gas invasion detection device and method for marine riser |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104453769B (en) * | 2014-11-17 | 2017-02-22 | 中国海洋石油总公司 | Method for treating trapped gas in deepwater blowout preventer stack |
WO2017115344A2 (en) | 2016-05-24 | 2017-07-06 | Future Well Control As | Drilling system and method |
CN106194085B (en) * | 2016-09-27 | 2018-08-10 | 吉林大学 | A kind of floating type quantitative degasser |
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US9500053B2 (en) | 2013-12-17 | 2016-11-22 | Managed Pressure Operations Pte. Ltd. | Drilling system and method of operating a drilling system |
US9845649B2 (en) | 2013-12-17 | 2017-12-19 | Managed Pressure Operations Pte. Ltd. | Drilling system and method of operating a drilling system |
US10435966B2 (en) | 2013-12-17 | 2019-10-08 | Managed Pressure Operations Pte Ltd | Apparatus and method for degassing drilling fluids |
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GB2572827B (en) * | 2018-04-15 | 2020-04-15 | Ramsay French Frank | Mud gas separator design which prevents gas from being discharged into shaker and mud pit rooms |
CN113669050A (en) * | 2021-09-02 | 2021-11-19 | 中国石油大学(北京) | Gas invasion detection device and method for marine riser |
Also Published As
Publication number | Publication date |
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AU2012278025B2 (en) | 2016-11-17 |
CN103649452B (en) | 2016-09-07 |
EP2723969B1 (en) | 2016-04-13 |
KR20140051274A (en) | 2014-04-30 |
BR112013033437B1 (en) | 2020-12-08 |
NO20110918A1 (en) | 2012-12-28 |
CN103649452A (en) | 2014-03-19 |
AU2012278025A1 (en) | 2014-01-16 |
BR112013033437A2 (en) | 2017-01-31 |
EP2723969A2 (en) | 2014-04-30 |
US9163466B2 (en) | 2015-10-20 |
US20140166360A1 (en) | 2014-06-19 |
CA2839620A1 (en) | 2013-01-03 |
WO2013000764A3 (en) | 2013-06-13 |
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