公开(公告)号：NO332667B1

公开(公告)日：2012-12-03

申请号：NO20034551

申请日：2003-10-10

Applicant: WEATHERFORD LAMB

Inventor： PEDERSEN GERALD DEAN ,  HIRTH DAVID E

IPC: E21B33/05 ,  E21B33/068 ,  E21B33/16 ,  E21B34/14

Abstract: A ball dropping assembly for dropping a plurality of objects, such as spherical balls, into a wellbore. The assembly first comprises a seat for retaining a ball before it is released. The assembly also comprises a ball-feeding channel for feeding additional balls onto the seat. A ball-retaining lever is provided to selectively receive and retain balls onto the seat, and then to release the balls individually into the wellbore. In one embodiment, the assembly is attached to a side bore in fluid communication with a main bore in a cementing head. The ball-retaining lever rotates into the bore when releasing a ball. When a plug is released into the bore from a cementing head, the plug will trip the lever, causing the ball-retaining lever to rotate back towards the ball-retained position. Thus, the ball dropping assembly also serves as a plug release indicator.

公开(公告)号：CA2554066C

公开(公告)日：2010-06-08

申请号：CA2554066

申请日：2003-09-26

Applicant: WEATHERFORD LAMB

Inventor： GUDMESTAD TARALD ,  HIRTH DAVID E ,  PEDERSEN GERALD D

IPC: E21B34/10 ,  E21B23/08 ,  E21B34/00 ,  E21B34/06 ,  E21B34/12

Abstract: A method and apparatus for obstructing the passage of fluid within a fluid flow conduit and subsequently reconfiguring the tool to allow substantially full- bore passage therethrough. Pressure developed upstream of the obstruction can be utilized to operate pressure actuated tools such as liner hangers. Equipment used in subsequent wellbore operations such as drill pipe darts can pass undamaged through the opened port. In an embodiment, the flow through a tubular is obstructed by placing a ball on an expandable ball seat, developing a pressure differential across the ball seat, equalizing the pressure after the hydraulically actuated tool completes its function, and mechanically manipulating the drill string to open the expandable ball seat and allow the ball to pass through.

公开(公告)号：NO327967B1

公开(公告)日：2009-11-02

申请号：NO20040183

申请日：2004-01-16

Applicant: WEATHERFORD LAMB

Inventor： PEDERSEN GERALD DEAN ,  GUDMESTAD TARALD ,  MURRAY MARK J ,  HIRTH DAVID E

IPC: E21B17/043 ,  F16L15/08

公开(公告)号：CA2452238C

公开(公告)日：2009-04-07

申请号：CA2452238

申请日：2003-12-04

Applicant: WEATHERFORD LAMB

Inventor： MAGUIRE PATRICK G ,  HIRTH DAVID E

IPC: E21B17/08 ,  E21B17/043 ,  E21B43/10

Abstract: The present invention generally relates to a connector arrangement for connecting a first tubular to a second tubular. In particular, the present invention relates to methods and apparatus for connecting the tubulars in such a way that the connection is prevented from becoming unmade in response to expansion of the tubulars. A connector mechanically mates a box end and a pin end of the tubulars together to form the connection. Additionally, mating castellations, surface finishes on the pin end and the box end, torque screws, and a variable pitch groove c an provide resistance to relative rotation between the tubulars at the connection.

公开(公告)号：GB2419908A

公开(公告)日：2006-05-10

申请号：GB0523626

申请日：2004-05-20

Applicant: WEATHERFORD LAMB

Inventor： HIRTH DAVID E ,  MAGUIRE PATRICK G

IPC: E21B43/10 ,  E21B23/04 ,  E21B23/06

Abstract: Embodiments of the present invention relates to hydraulically actuated tools, which may be used to actuate a liner hanger assembly. In one embodiment, the present invention provides a hydraulic setting tool (113) for use in wellbore operations. The setting tool includes a first tubular member (130) and a second tubular member (120) disposed around the outer diameter of the first tubular member. A piston (110) is mechanically attached to an upper portion of the second tubular member and adapted to move axially in relation to the first tubular member. The piston acts to transmit a force to the second tubular member A slip assembly (162) is operatively connected to the second tubular member and the second tubular member transmits the force to the slip assembly thereby actuating the slip assembly.

公开(公告)号：GB2396174B

公开(公告)日：2005-10-05

申请号：GB0327787

申请日：2002-11-26

Applicant: WEATHERFORD LAMB

Inventor： HIRTH DAVID E

IPC: E21B43/10

公开(公告)号：GB2392965B

公开(公告)日：2005-03-23

申请号：GB0400469

申请日：2002-10-22

Applicant: WEATHERFORD LAMB

Inventor： PEDERSEN GERALD DEAN ,  HIRTH DAVID E ,  GUDMESTAD TARALD ,  MURRAY MARK J

IPC: E21B17/043 ,  F16L15/08 ,  E21B17/046 ,  E21B19/16 ,  F16L15/00 ,  F16L21/08

Abstract: A connector arrangement used for connecting and locking tubular members. The connector consists of two tubular members and a coupling member. The tubular members are threaded together to create a threaded connection. The locking arrangement is provided by a pathway formed on the tubular member whereby a locking member can be inserted in to the pathway to lock the threaded connection. The locking arrangement is also provided by a plurality of castellation members disposed on each tubular member. The connector also has a separate coupling member which has opposite right-hand and left-hand threaded ends to threadedly mate with the threads of the two tubular members.

公开(公告)号：GB2401621A

公开(公告)日：2004-11-17

申请号：GB0410879

申请日：2004-05-14

Applicant: WEATHERFORD LAMB

Inventor： HIRTH DAVID E ,  GUDMESTAD TARALD

IPC: E21B33/12 ,  E21B33/128

Abstract: An expandable packer 318 comprises elastomeric 346A, B and non-elastomeric (preferably a metallic component) 344A, B, C sealing elements. The expandable packer 318 is constructed from a non-eleastomeric tubular body 340 having a frustoconical shaped inner surface 352A for contacting a wedge 308; a hollow mid section forming voids / cavities 358A, B; and a smooth outer surface 342 for carrying the elastomeric seals 346A, B. Upon activation, the wedge 308 expands the packer 318 and causing it to contact a casing 106. The expansion process forces the voids / cavities 358A, B to collapse to allow elastomeric seals 346A, B to sit within the tubular body 340 so that both the elastomeric 346A, B and non-elastomeric 344A, B, C sealing elements contact the casing 106.

公开(公告)号：NO20141195A1

公开(公告)日：2004-11-16

申请号：NO20141195

申请日：2014-10-07

Applicant: WEATHERFORD LAMB

Inventor： HIRTH DAVID E ,  GUDMESTAD TARALD

IPC: E21B33/124 ,  E21B33/12

Abstract: Oppfinnelsen vedrører en tetningsring for tetning av et ringformet område i et brønnhull, som omfatter en indre tetningsoverflate som har minst to innover radialt utvidende ribber som danner en kavitet derimellom; og en ytre tetningsoverflate som inkluderer minst ett hevet elastomerisk forseglingselement, idet elementet er anordnet på den ytre tetningsoverflaten motsatt av kaviteten hvorved, når forseglingselementet er sammentrykket, den ytre overflaten er deformert i området av forseglingselementet ved kaviteten. Oppfinnelsen vedrører også en tetning for en tetningsoperasjon for et brønnhull, som omfatter en rørformet kropp som har en ytre overflate, langs minst en del av den rørformede kroppen, som er hovedsakelig glatt og sylindrisk i en ikke-herdet posisjon av tetningen; og et elastomerisk forseglingselement anordnet på den ytre overflaten. Oppfinnelsen vedrører videre en tetningssammenstilling for anvendelse i en tetningsoperasjon for et brønnhull, og en fremgangsmåte for dannelse av et segl i et borehull.

公开(公告)号：GB2401128A

公开(公告)日：2004-11-03

申请号：GB0409692

申请日：2004-04-30

Applicant: WEATHERFORD LAMB

Inventor： HIRTH DAVID E

IPC: E21B23/01 ,  E21B33/129

Abstract: Apparatus for anchoring tools in a wellbore comprises an expandable cone 102 having an integral shoulder 140, a recess 106 on the cone surface and a slip 104 located in the recess. Axial travel of the slip is limited by the shoulder. In an alternative embodiment, a wedge shaped gap 108 may also be provided in the cone, along with a wedge shaped member 116 in the gap, the member featuring the same recess, shoulder and slip arrangement as the cone. Also disclosed is a method of anchoring a wellbore by radially expanding a cone with a wedge shaped gap by urging a wedge shaped member through the gap. Alternatively, the cone can be compressed, the wedge shaped member fixed to the cone to hold the cone in compression during run in to the hole, before force is applied to the member to break the connection.