Abstract:
A plug for use in wellbore operations, which plug is deformable such that, in use, upon fluid pressure reaching a predetermined level, said plug deforms allowing fluid to pass between said plug and a tubular in which said plug is located.
Abstract:
A liner deployment assembly (LDA) for use in a wellbore includes: a crossover tool. The crossover tool includes: a seal for engaging a tubular string cemented into the wellbore; a tubular housing carrying the seal and having bypass ports straddling the seal; a mandrel having a bore therethrough and a port in fluid communication with the mandrel bore, the mandrel movable relative to the housing between a bore position where the mandrel port is isolated from the bypass ports and a bypass position where the mandrel port is aligned with one of the bypass ports; a bypass chamber formed between the housing and the mandrel and extending above and below the seal; and a control module. The control module includes: an electronics package; and an actuator in communication with the electronics package and operable to move the mandrel between the positions.
Abstract:
The present invention generally relates to an apparatus and method for expanding an expandable tubular assembly in a borehole. In one aspect, a system for expanding a tubular (560) having an anchor portion (550) in a borehole is provided. The system includes a running tool (535) configured to position the tubular in the borehole. The running tool including a first expander (520) configured to activate the anchor portion by expanding the tubular (525) to a first diameter. The system further includes a second expander (540) configured to expand the tubular (525) to a second larger diameter, wherein the second expander (540) is movable between a retracted position and an expanded position. In another aspect, a method of expanding a tubular having an anchor portion in a borehole is provided.
Abstract:
Apparatus and methods are provided for a cementing operation for use with a drilling with casing application. In one embodiment, an apparatus (1) is provided for stage cementing using a full opening stage tool (30). In another embodiment, an apparatus is provided for reverse cementing of the casing.
Abstract:
The invention provides a bottom cementing plug (594) which is releasably attached to a top plug (584) by means of a tubular sleeve (550) and shear pins (553). Instead of shear pins a shear ring, which may be segmented, and which is integral with the tubular sleeve, may be arranged. The tubular sleeve (550) comprises first openings (565) which are covered by burst plates (570) for allowing cement to pass after having set the plug on the float shoe at the casing bottom. The tubular sleeve (550) may comprise second openings (554) covered by burst plates (555) to allow the cementing process to be performed in case that the top plug has been launched together with the bottom plug. The invention further provides a dart launching device, where the darts are arranged in a sleeve coaxially with and radially spaced from the housing of the launching device. A fluid diverter is arranged at the top of the launching device for diverting the fluid into the annular space between sleeve and housing in order to prevent pressure overload on the plungers which hold the darts in place before they are launched.
Abstract:
Methods and apparatus for running tubulars into and out of a wellbore. A gripping apparatus is activated with an actuator having a primary actuator and a redundant safety feature. The backup safety feature may include one or more redundant fluid operated pistons. The gripping apparatus may include an integrated safety system adapted to prevent damage to the tubulars while making and breaking out connections between the tubulars and the tubular string. The apparatus may be part of a top drive and comprise a swiver, a cementing plug launcher and/or a sensor.
Abstract:
The present invention provides a simple debris removal apparatus (200) for use in a wellbore. In one aspect of the invention a modular, interchangeable venturi (210) is provided which can be retrofit into an existing debris bailer having a filter and a debris collection container (225). In another aspect of the invention, a venturi is utilised to create a negative pressure in a wellbore sufficient to actuate a retrieval tool for a downhole device. In yet another aspect of the invention, a combination tool is provided which can evacuate debris in a wellbore, thereby uncovering a downhole device which can then be removed in a single trip. In yet another aspect of the invention, a debris removal apparatus is provided with a method for utilising the apparatus in a wellbore on coiled tubing.
Abstract:
The present invention generally relates to an apparatus and method for expanding an expandable tubular assembly in a borehole. In one aspect, a system for expanding a tubular having an anchor portion in a borehole is provided. The system includes a running tool configured to position the tubular in the borehole. The running tool including a first expander configured to activate the anchor portion by expanding the tubular to a first diameter. The system further includes a second expander configured to expand the tubular to a second larger diameter, wherein the second expander is movable between a retracted position and an expanded position. In another aspect, a method of expanding a tubular having an anchor portion in a borehole is provided.
Abstract:
Methods and apparatus for running tubulars into and out of a wellbore. A gripping apparatus is activated with an actuator having a primary actuator and a redundant safety feature. The backup safety feature may include one or more redundant fluid operated pistons. The gripping apparatus may include an integrated safety system adapted to prevent damage to the tubulars while making and breaking out connections between the tubulars and the tubular string. The apparatus may be part of a top drive and comprise a swiver, a cementing plug launcher and/or a sensor.
Abstract:
In one embodiment, a method of forming a wellbore includes running a liner drilling assembly into the wellbore, the liner drilling assembly having a liner, a conveying member, one or more connection members, and a drilling member. The method includes temporarily suspending the liner at a location below the rig floor; releasing the conveying member and the drilling member from the liner; re-connecting the conveying member to the liner; releasing the liner from its location of temporary suspension; and advancing the liner drilling assembly.