| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 61 | Method, system and tool for reservoir evaluation and well testing during drilling operations | EP08004186.6 | 2001-09-19 | EP1936112B1 | 2009-12-16 | Rester, Stephen; Hunt, James L.; Weimers, Tim; Chacon, Edgar; Baldauff, John; Johnson, Michael H.; Allen, Rob L. |
| 62 | METHOD AND APPARATUS FOR VARYING THE DENSITY OF DRILLING FLUIDS IN DEEP WATER OIL DRILLING APPLICATIONS | EP03811248.8 | 2003-11-03 | EP1558831B1 | 2009-09-09 | De Boer, Luc |
| A method and apparatus for controlling drilling mud density at a location either at the seabed (or just above the seabed) or alternatively below the seabed of wells in deep water and ultra deep water applications are disclosed. The present invention combines abase fluid of lesser density than the mud required at the wellhead to produce a diluted mud in the riser. By combining the appropriate quantities of drilling mud with base fluid, a riser mud density at or near the density of seawater may be achieved. The present invention also includes a wellhead injection device for attachment to the wellhead and for injecting the base fluid into the rising drilling mud at a location below the seabed. The riser charging lines are used to carry the low density base fluid to the injection device for injection into the drilling mud below the seabed. The cuttings are brought to the surface with the diluted mud and separated in the usual manner. The diluted mud is then passed through a centrifuge system to separate the heavier drilling mud from the lighter base fluid. | ||||||
| 63 | METHOD FOR INCREASING PRODUCTION FROM A WELLBORE | EP03707764.1 | 2003-02-06 | EP1497530B1 | 2009-08-05 | PIA, Giancarlo, T. |
| Method for recovering productivity of an existing well. First, an assembly is inserted into a wellbore, the assembly includes a tubular member (135) for transporting drilling fluid downhole and an under-reamer (125) disposed at the end of the tubular member. Next, the assembly is positioned near a zone of interest and drilling fluid (140) is pumped down the tubular member (135). The drilling fluid (140) is used to create an underbalanced condition where a hydrostatic pressure in the annulus (175) is below a zone of interest pressure. The under-reamer (125) is activated to enlarge the wellbore diameter and remove a layer of skin for a predetermined length. During the under-reaming operation, the hydrostatic pressure is maintained below the zone of interest pressure, thereby allowing wellbore fluid (145) to migrate up the annulus (175) and out of the wellbore. Upon completion, the under-reamer (125) is deactivated and the assembly is removed from the wellbore. | ||||||
| 64 | DRILLING RIG AND METHOD FOR INTRODUCING ONE OR MORE DRILLING PIPES INTO AN UNDERBALANCED WELL USING SAME | EP06783925.8 | 2006-09-15 | EP1924756B1 | 2009-05-06 | DE WIT, Lammert; BERGMAN, Cornelis |
| The invention relates to a drilling rig, comprising a mast to be placed above or close to a well and means connected to the mast for carrying drill pipes to be lowered into the well, which carrying means comprise at least three carriers which are connected at different heights to the mast and displaceable in height direction therealong and which are adapted to exert a pulling force or a pressing force as required on the drill pipes. The upper carrier can have means for rotatingly driving the drill pipes, while the lower carrier, which can be connected releasably to the mast, can have flexible means for connecting thereof to a blowout preventer placed on the well. The invention further relates to a method for introducing one or more drill pipes into an underbalanced well while making use of such a drilling rig, comprising of suspending the drill pipe(s) from the carrying means and urging the pipe(s) downward into the well while exerting a pressing force. | ||||||
| 65 | Apparatus and method for return of drilling fluid from a sealed marine riser to a floating drilling rig while drilling | EP05112881.7 | 2000-03-01 | EP1666696B1 | 2008-12-03 | Hannegan, Don, M.; Bourgoyne, Darryl, A. |
| 66 | METHOD FOR VARYING THE DENSITY OF DRILLING FLUIDS IN DEEP WATER OIL AND GAS DRILLING APPLICATIONS | EP06838376.9 | 2006-11-21 | EP1957744A1 | 2008-08-20 | De Boer, Luc |
| A method and system for controlling drilling mud density in drilling operations. The mud required at the wellhead is combined with a base fluid of a different density to produce diluted mud in the riser. By combining the appropriate quantities of drilling mud with base fluid, riser mud density at or near the density of seawater may be achieved, thereby permitting greater control over the pressure in the wellbore and various risers. Blowout preventers may also be used in combination with the process to control these pressures. Concentric risers are disclosed, wherein an annulus defined within one riser is utilized to carry the different density base fluid to the inj ection point for inj ection into the drilling mud, while an annulus defined within another riser is utilized to carry the combination fluid and cuttings back to the drilling rig. Cuttings are separated in the usual manner at the surface. The diluted mud is passed through a centrifuge system to separate drilling mud from the different density base fluid. The centrifuge system may also be utilized to separate the recovered drilling fluid into a substantially barite portion and a substantially drilling fluid portion, wherein the two portions are stored locally at the rig and recirculated during drilling operations. | ||||||
| 67 | Method, system and tool for reservoir evaluation and well testing during drilling operations | EP08004186.6 | 2001-09-19 | EP1936112A3 | 2008-07-23 | Rester, Stephen; Hunt, James L.; Wiemers, Tim; Chacon, Edgar; Baldauff, John; Johnson, Michael H.; Allen, Rob L. |
In one form of the invention, a formation evaluation is made using a direct measurement of the formation's ability to flow fluids. The flow potential of a reservoir during underbalanced well construction is determined as the well is being constructed. The trajectory and path of the wellbore through the reservoir are modified to intersect formation having more desirable permeability and productivity to decrease the time to market of the hydrocarbon reserves within a reservoir without the time delay inherent when conventional formation evaluation techniques are applied. A downhole flow measurement instrument (27) is used to obtain actual flow ratios. The instrument is integrated into a near-bit stabilizer (12) and can be used for early kick and benign "breathing" fractures detection in the open hole wellbore.
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| 68 | UNDERBALANCED WELL DRILLING AND PRODUCTION | EP04806532.0 | 2004-10-25 | EP1700000B1 | 2008-04-23 | HUMPHREYS, Gavin, Ullevi House |
| Underbalanced production and drilling may be achieved by a system which uses a rotating head coupled to surface blowout preventer stack for fluid flow control. A casing connects these surface components to a subsea shutoff assembly with a pair of ram shear devices to cut off the string to the wellhead. Both the casing and an alternate line may be latched so that they may be released if necessary. The alternate line may provide fluid from the surface to the subsea shutoff assembly for purposes of varying the density of the returning mud. The rotating head may include a rubber packer to prevent upward flow of drilling fluid and production hydrocarbons and, at the same time, provide rotation to the drill string. | ||||||
| 69 | Vessel for well intervention | EP04254129.2 | 2004-07-09 | EP1496297B1 | 2007-11-14 | Boyle, John |
| 70 | CLOSED LOOP MULTIPHASE UNDERBALANCED DRILLING PROCESS | EP03763408.6 | 2003-07-09 | EP1532347B1 | 2007-10-03 | CHITTY, Gregory, H.; SAPONJA, Jeffrey, Charles; HOSIE, David, Graham |
| The present invention provides apparatus and methods for handling fluids returning from a well. The fluids are introduced into a separator (110) and a separated gas stream (60) is recovered or recycled. The gas stream may comprise more than one phase. The separated gas stream is urged through a multiphase pump (200) before it is recovered. Alternatively, the return fluids may pass through a multiphase pump before it is introduced into the separator. | ||||||
| 71 | Underbalanced well drilling and production | EP07008662.4 | 2004-10-25 | EP1808569A2 | 2007-07-18 | Humphreys, Gavin |
The invention provides a drilling rig and method comprising coupling a surface blow out preventer (12) to a wellhead using casing; providing a remotely operable subsurface latch (72) to sever the connection between said wellhead and said surface blow out preventer (12); and producing hydrocarbons from a subsea well in an underbalanced condition using a rotating head (10) mounted on the surface blow out preventer (12).
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| 72 | GAS SEPARATOR | EP05787856.3 | 2005-09-20 | EP1792050A1 | 2007-06-06 | KOLLÉ, Jack |
| A combination liquid and gas separator and jetting tool includes a housing (1) containing a rotatable drum (2), a stator (6) in the inlet end of the housing (1) for swirling a liquid/gas mixture, a rotor (9) attached to the drum (2) for rotation by the mixture; whereby the gas and liquid are separated. The liquid and gas are discharged through separate restricted orifices (28, 32) downstream of the drum. Orifices (44, 59) can be located in a rotating head (43) for cleaning, cutting or other downhole operations. | ||||||
| 73 | Underbalanced well completion | EP05075319.3 | 1999-09-01 | EP1536100B1 | 2007-04-04 | Webb, Alan B. |
| 74 | Apparatus and method for return of drilling fluid from a sealed marine riser to a floating drilling rig while drilling | EP05112881.7 | 2000-03-01 | EP1666696A3 | 2006-11-08 | Hannegan, Don, M.; Bourgoyne, Darryl, A. |
A floating rig or structure (S) for drilling in the floor of an ocean using a rotatable tubular includes a seal housing having a rotatable seal (SJ) connected above a marine riser (R) fixed to the floor of the ocean. The seal rotating with the rotating tubular allows the riser and seal housing to maintain a predetermined pressure in the system that is desirable in underbalanced drilling, gas-liquid mud systems and pressurized mud handling systems. A flexible conduit (30,32) or hose is used to compensate for the relative movement of the seal housing and the floating structure (S) since the floating structure moves independent of the seal housing. A method for use of the system is also disclosed.
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| 75 | A METHOD AND DEVICE FOR CONTROLLING DRILLING FLUID PRESSURE | EP04808853.8 | 2004-11-24 | EP1702135A1 | 2006-09-20 | Stave, Roger |
| A method and device for controling drilling fluid pressure during subsea drilling, where drilling fluid is pumped down into a borehole (15) and then flows back to a drilling rig (1) via the lined and/or unlined sections of the borehole (15) and a liner (14), wherein the drilling fluid pressure is controlled by pumping drilling fluid out of the liner (14) at the seabed, and where the liner (14) annulus (30) above the drilling fluid is filled with a riser fluid having a density different from that of the drilling fluid. | ||||||
| 76 | UNDERBALANCED WELL DRILLING AND PRODUCTION | EP04806532.0 | 2004-10-25 | EP1700000A1 | 2006-09-13 | HUMPHREYS, Gavin, Ullevi House |
| Underbalanced production and drilling may be achieved by a system which uses a rotating head coupled to surface blowout preventer stack for fluid flow control. A casing connects these surface components to a subsea shutoff assembly with a pair of ram shear devices to cut off the string to the wellhead. Both the casing and an alternate line may be latched so that they may be released if necessary. The alternate line may provide fluid from the surface to the subsea shutoff assembly for purposes of varying the density of the returning mud. The rotating head may include a rubber packer to prevent upward flow of drilling fluid and production hydrocarbons and, at the same time, provide rotation to the drill string. | ||||||
| 77 | ROTATING BLOWOUT PREVENTER | EP00906522.8 | 2000-03-01 | EP1175549B1 | 2005-12-28 | HANNEGAN, Don, M.; BOURGOYNE, Darryl, A. |
| A floating rig or structure for drilling in the floor of an ocean using a rotatable tubular includes a seal housing having a rotatable seal connected above a marine riser fixed to the floor of the ocean. The seal rotating with the rotating tubular allows the riser and seal housing to maintain a predetermined pressure in the system that is desirable in underbalanced drilling, gas-liquid mud systems and pressurized mud handling systems. A flexible conduit or hose is used to compensate for the relative movement of the seal housing and the floating structure since the floating structure moves independent of the seal housing. A method for use of the system is also disclosed. | ||||||
| 78 | Underbalanced well completion | EP05075319.3 | 1999-09-01 | EP1536100A3 | 2005-09-28 | Webb, Alan B. |
A method of completing a subterranean well. The method comprising the steps of: separating first and second wellbore portions (258, 254) of the well by positioning a first valve (260) therebetween, the first valve (260) selectively permitting and preventing fluid flow between the first and second wellbore portions (258, 254); and conveying a production assembly (280) and a shifting device (34) releasably secured thereto into the well, the shifting device being releasable from the production assembly in the well, and at least a portion of the production assembly (280) passing through the first valve (260) and automatically opening the first valve (260) as the production assembly (280) passes therethrough. |
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| 79 | METHOD AND APPARATUS FOR VARYING THE DENSITY OF DRILLING FLUIDS IN DEEP WATER OIL DRILLING APPLICATIONS | EP03811248.8 | 2003-11-03 | EP1558831A2 | 2005-08-03 | De Boer, Luc |
| A method and apparatus for controlling drilling mud density at a location either at the seabed (20) (or just above the seabed (20)) or alternatively below the seabed of wells (40) in deep water and ultra deep water applications are disclosed. The present invention combines abase fluid of lesser density than the mud required at the wellhead (300) to produce a diluted mud in the riser (80). By combining the appropriate quantities of drilling mud with base fluid, a riser mud density at or near the density of seawater may be achieved. The present invention also includes a wellhead injection device (32) for attachment to the wellhead (300) and for injecting the base fluid into the rising drilling mud at a location below the seabed (20). The riser charging lines (100) are used to carry the low density base fluid to the injection device (32) for injection into the drilling mud below the seabed (20). The cuttings are brought to the surface with the diluted mud and separated in the usual manner. The diluted mud is then passed through a centrifuge system to separate the heavier drilling mud from the lighter base fluid. | ||||||
| 80 | SYSTEM TO REDUCE HYDROSTATIC PRESSURE IN RISERS USING BUOYANT SPHERES | EP02761843.8 | 2002-09-27 | EP1552104A1 | 2005-07-13 | BOYADJIEFF, George |
| A pumping system (10) for injecting buoyant spheres (12) into an oil or gas well (14) having a feeder (26) containing a plurality of buoyant spheres (12); and a sphere pump (24) in proximity to the feeder (26), having first and second rotatable wheels (30, 32), wherein the first wheel (30) has a plurality of notches (33) and the second wheel (32) has a corresponding plurality of notches (34), such that during rotation of the wheels (30, 32) the first and second wheel notches (33, 34) temporarily combine to form a plurality of pockets (40), wherein each pocket (40) receives then ejects one of the plurality of buoyant spheres (24) from the feeder (26) during rotation of the first and second wheels (30, 32). | ||||||
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