-
公开(公告)号：EP0979343B1
公开(公告)日：2001-10-24
申请号：EP98919300.8
申请日：1998-05-01
IPC分类号： E21B17/07
CPC分类号： E21B17/07
摘要： This invention relates to an apparatus for controlling the motion of a string of tubulars in a wellbore. In milling a tubular with a downhole mill, using too much weight on the mill and/or advancing the mill too quickly can result in inadequate milling, inefficient milling, and damage to the mill, its associated equipment, and the item to be milled. In offshore milling operations, a mill lifted away from a tubular being milled, e.g. by a swell at the water's surface that lifts a boat or barge from which the milling system is suspended, can be slammed back into the tubular being milled as the swell passes and the boat is effectively lowered. This is particularly undesirable.
-
公开(公告)号：EP0948700A2
公开(公告)日：1999-10-13
申请号：EP97913291.0
申请日：1997-11-19
CPC分类号： E21B23/04 , E21B7/061 , E21B10/50 , E21B21/10 , E21B23/06 , E21B29/06 , E21B34/10 , E21B34/101 , E21B44/005 , E21B47/091
摘要： A whipstock (10) has a flowchannel (41) therethrough to facilitate the rapid lowering of the whipstock through liquid in an oil well. A whipstock (10) has a guide surface and a sacrificial element (20) spaced from the guide surface. In use, the sacrificial surface prevents the starting mill damaging the guide surface during the formation of the initial opening in a casing. The undamaged guide surface can later be used for accurately guiding tubulars and tools to help ensure that lateral bores are correctly positioned.
-
公开(公告)号：EP1272727B1
公开(公告)日：2006-06-21
申请号：EP01917329.3
申请日：2001-04-05
发明人： BRUNNERT, David, J. , CARTER, Thurman, B. , INGRAM, Gary, D. , TEALE, David , HAUGEN, David, Michael
IPC分类号： E21B1/00
CPC分类号： E21B7/061 , E21B23/06 , E21B34/063
摘要： The invention provides an apparatus (300, 400) for actuating a downhole tool (700) by utilizing a pressure differential created by fluid flowing through a conduit (315). The conduit is in communication with a pressure sensing line (400) that is selectively exposable to areas of the conduit (316, 317) having different pressures. By exposing the pressure sensing line to a portion of the conduit having a predetermined pressure therein, the pressure sensing line causes actuation of a hydraulic tool therebelow.
-
4.发明授权MILLING TOOL, WHIPSTOCK, MILLING SYSTEM AND METHOD OF FORMING A WINDOW IN THE WALL OF A TUBULAR 失效铣削刀具，造斜器，研磨系统和方法，用于创建一个窗口在管中
公开(公告)号：EP0815345B1
公开(公告)日：2002-01-16
申请号：EP96908265.0
申请日：1996-04-01
CPC分类号： E21B47/091 , E21B7/061 , E21B10/50 , E21B29/06 , E21B44/005
摘要： A milling tool (110) is provided with a valve member (122) which can be displaced to inhibit the flow of drilling fluid through the milling tool (110). A whipstock (150) is provided with a stop (155) which the valve member (122) engages as the milling tool (110) moves down the whipstock (150). Further downward movement of the milling tool (110) relative to the whipstock (150) displacing the valve member (122) relative to the milling tool (110) and inhibits the flow of drilling fluid therethrough. This results in a decrease in flow and increase in pressure at the mud pumps signifying that milling should cease. If the milling tool (110) is being driven by a mud motor (156) which exhausts through the milling tool (110) the mud motor (156) will stop when the flow through the milling tool is inhibited.
-
公开(公告)号：EP1034354A1
公开(公告)日：2000-09-13
申请号：EP98952847.6
申请日：1998-11-02
IPC分类号： E21B1/00
CPC分类号： E21B7/061 , E21B7/10 , E21B10/04 , E21B10/46 , E21B10/50 , E21B10/60 , E21B17/02 , E21B21/10 , E21B29/06
摘要： A mill for use in a wellbore, said mill comprising a bore (414) for accomodating a core, characterised in that at least a portion of said bore does not extend axially of said mill to, in use, facilitate separation of the core from a tubular being milled.
-
公开(公告)号：EP0815344A1
公开(公告)日：1998-01-07
申请号：EP96908264.0
申请日：1996-04-01
发明人： CARTER, Thurman, B.
CPC分类号： E21B49/06 , E21B7/061 , E21B10/50 , E21B10/60 , E21B12/04 , E21B23/00 , E21B23/01 , E21B23/02 , E21B29/06
摘要： A whipstock (1) comprises a concave (2) which comprises a tapered support member (3) which accommodates a plurality of spacers (7). The spacers (7) can be moved from an inoperative position to an operative position in which they project outwardly from the tapered support member (3) to support the tapered support member (3). The spacers (7) are shaped and disposed so that when they are moved to project outwardly from the support member (3) they project by different distances from the support member (3).
-
公开(公告)号：EP1159510B1
公开(公告)日：2004-08-04
申请号：EP00907833.8
申请日：2000-03-07
发明人： ROBERTS, John, D. , DRECHSLER, Jan , SALVERSEN, Tom , UNSGAARD, Tom , ENERSTVEDT, Eirik , BLIZZARD, William, A., Jr. , LANGFORD, Dale, A. , CARTER, Thurman, B.
CPC分类号： E21B7/10 , E21B7/061 , E21B10/006 , E21B10/04 , E21B10/08 , E21B10/46 , E21B10/50 , E21B10/567 , E21B10/60 , E21B10/62 , E21B12/04 , E21B17/02 , E21B17/1092 , E21B21/10 , E21B23/00 , E21B23/01 , E21B23/02 , E21B23/04 , E21B23/06 , E21B29/06 , E21B33/127 , E21B33/1275 , E21B34/10 , E21B34/101 , E21B41/0035 , E21B44/005 , E21B47/091 , E21B49/06
摘要： A new wellbore apparatus has been invented which, in certain aspects, has anchor apparatus (42) for anchoring the wellbore apparatus in a bore, the anchor apparatus actuated by fluid under pressure supplied thereto, and sealing apparatus (40) selectively inflatable to close off the bore to fluid flow there through, and temperature compensating apparatus (48) for maintaining a desired fluid pressure in the sealing apparatus to prevent it from bursting or deflating.
-
公开(公告)号：EP1015731B1
公开(公告)日：2002-10-23
申请号：EP98939735.1
申请日：1998-08-21
IPC分类号： E21B29/00
CPC分类号： E21B10/5673 , E21B29/00 , E21B29/002 , Y10T407/245
摘要： A cutting insert (610) for a tool for wellbore milling operations, the cutting insert (610) comprising: a body (612) having a top; a plurality of spaced-apart chipbreaking indentations (614) in the top of the body; and a strengthening ridge (618) projecting from the top of the body between adjacent chipbreaking indentations of the plurality of spaced-apart chipbreaking indentations.
-
公开(公告)号：EP0979343A1
公开(公告)日：2000-02-16
申请号：EP98919300.8
申请日：1998-05-01
IPC分类号： E21B17/07
CPC分类号： E21B17/07
摘要： This invention relates to an apparatus for controlling the motion of a string of tubulars in a wellbore. In milling a tubular with a downhole mill, using too much weight on the mill and/or advancing the mill too quickly can result in inadequate milling, inefficient milling, and damage to the mill, its associated equipment, and the item to be milled. In offshore milling operations, a mill lifted away from a tubular being milled, e.g. by a swell at the water's surface that lifts a boat or barge from which the milling system is suspended, can be slammed back into the tubular being milled as the swell passes and the boat is effectively lowered. This is particularly undesirable.
-
公开(公告)号：EP0948700B1
公开(公告)日：2006-01-18
申请号：EP97913291.7
申请日：1997-11-19
CPC分类号： E21B23/04 , E21B7/061 , E21B10/50 , E21B21/10 , E21B23/06 , E21B29/06 , E21B34/10 , E21B34/101 , E21B44/005 , E21B47/091
摘要： A whipstock (10) has a flowchannel (41) therethrough to facilitate the rapid lowering of the whipstock through liquid in an oil well. A whipstock (10) has a guide surface and a sacrificial element (20) spaced from the guide surface. In use, the sacrificial surface prevents the starting mill damaging the guide surface during the formation of the initial opening in a casing. The undamaged guide surface can later be used for accurately guiding tubulars and tools to help ensure that lateral bores are correctly positioned.
-
-
-
-
-
-
-
-
-
搜索结果
17 条记录 (耗时 0.011 秒)
