Abstract:
Present embodiments are directed to a control system including a controller configured to regulate a drilling fluid flow through a pipe element during installation of the pipe element into a wellbore or removal of the pipe element from the wellbore, wherein the controller is configured to regulate the drilling fluid flow based on feedback from one or more sensors of the control system.
Abstract:
An apparatus for installing two sensing instruments and cables inside of a single tubing string in a wellbore for monitoring well conditions at two different locations includes an upper sensor attached to an inner sleeve seated at a first location in a ported outer sleeve in the tubing string. The upper sensor is allowed to be in pressure communication with the exterior of the tubing string at the first location. A second lower sensor is deployed on a pump down cup (PDC) assembly to a lower depth in the outer sleeve to allow fluid pressures to be monitored at a second location in the wellbore.
Abstract:
A pipe designed to be placed within a well for producing a fluid of interest, a pipe onto the outer face whereof is crimped a tubular metal element, wherein: the inner face of the tubular element exhibits an annular groove wherein is engaged a metal anchoring ring or a pair of anchoring rings set back-to-back; each anchoring ring consists of a ring split transversely at least partially, is provided on its inner face with projecting anchoring members, and exhibits, in cross-section, a base equipped with the projecting members and at least one flank forming an acute angle with the base; the annular groove exhibits a profile that is substantially complementary to that of the ring or of the pair of rings; the depth of the groove being less than the thickness of the ring or of the rings; such that the projecting members are at least partially embedded into the pipe after crimping of the metal element onto the pipe.
Abstract:
A subterranean tool can drop multiple objects to landing locations in a tubular string. The tool can keep at least one ball out of the fluid stream until ready for release. A dart or wiper plug can be kept in the fluid stream with an open bypass until axial mandrel movement allows release of the plug or dart. The tool is rotationally locked at a lower location for run in and then can rotationally lock at an upper location upon release of the dart or ball. Axial movement that releases the dart can continue until the ball aligns with a decreasing depth groove so that relative part rotation cams the ball against a leaf spring detent and into the mandrel flow path.
Abstract:
The present invention relates to a downhole system (100) for sealing an opening (2) in a wall of a well tubular structure in a borehole (4) downhole by means of a downhole tubular assembly (1), comprising the downhole tubular assembly comprising an expandable tubular part (5) having an inner face (6) and an unexpanded expandable tubular thickness in an unexpanded state, and a helical spring (7) having a helical inner diameter, a radial helical spring thickness and a helical outer diameter in an unexpanded state, the helical spring being arranged inside the expandable tubular part and substantially concentrically with the expandable tubular part, an expansion tool (9) for expanding the tubular assembly inside the well tubular structure (3) in one direction, the expansion tool comprising an expansion part having a diameter, and the expansion tool being arranged substantially on an axis which is concentric and longitudinal with the tubular assembly, and positioned in a first position, wherein the expandable tubular part is expanded by moving the expansion tool from the first position through the expandable tubular part and the helical spring so that the helical spring extends the diameter of the expansion part and acts as a distance element when expanding the expandable tubular part to abut the well tubular structure for sealing the opening. Furthermore, the present invention relates to a downhole tubular assembly and a method of sealing an opening in a wall of a well tubular structure in a borehole downhole.
Abstract:
A method is for establishing an annulus barrier in a subterranean well. The method comprises providing a plug in the well and along a longitudinal section thereof, wherein the plug, at least in a portion of the longitudinal section, covers substantially the entire cross-section of the well in such a manner that the plug covers both the inside, and the outside of a casing; removing a central through portion of the plug internally in the casing in such a manner that a through central opening is formed in the plug, and in such a manner that at least a cross-sectional section of the plug remains on the outside of the casing; disposing and anchoring a connection pipe in the well, and internally in the casing, in such a manner that the connection pipe extends at least along, a. length of the remaining cross-sectional section; and sealing, in a fluid-tight manner, an annulus between the casing and the connection pipe.
Abstract:
An apparatus for use in a fluid conduit comprises a plurality of segments arranged along a longitudinal axis, each segment comprising an extendable structure configured for extension in a lateral direction relative to the longitudinal axis, wherein the apparatus is configured for the sequential initiation of lateral extension of the extendable structures of at least two segments. At least two segments may be configured to define different maximum extended dimensions in the lateral direction and may include adjacent support surfaces which provide mutual support for one another when the at least two segments are laterally extended. The apparatus may be configured to form a seal, an anchor, a supporting structure and/or a flow restriction in a fluid conduit.
Abstract:
A fracturing operation is done in open hole without annular space isolation. The annular space is spanned by telescoping members that are located behind isolation valves. A given bank of telescoping members can be uncovered and the telescoping members extended to span the annular space and engage the formation in a sealing manner. Pressurized fracturing fluid can be pumped through the telescoped passages and the portion of the desired formation fractured. In a proper formation, cementing is not needed to maintain wellbore integrity. The telescoping members can optionally have screens. Normally, the nature of the formation is such that gravel packing is also not required. A production string can be inserted into the string with the telescoping devices and the formation portions of interest can be produced through the selectively exposed telescoping members.
Abstract:
A method for drilling and completing multiple wellbores in a subsurface rock formation includes drilling a first wellbore along a first selected trajectory through the rock formation. The first wellbore is fracture treated and then abandoned. A second wellbore is drilled along a second selected trajectory through the rock formation. The second trajectory is laterally spaced from the first trajectory. The second wellbore is then fracture treated and abandoned. A third wellbore is drilled along a third selected trajectory through the rock formation. The third trajectory is disposed between the first and second trajectories. The third wellbore is fractured treated such that a fracture network extending therefrom hydraulically connects to fracture networks extending from the first and second wellbores.