Abstract:
A method and apparatus for a drilling with casing includes therewith a drill shoe (10) configured for later drilling through thereof in situ, with cutters retainable thereon in response to the forces encountered during borehole drilling, yet moveable from the envelope through which the later drill shoe will pass when cutting through the in situ drill shoe (10). The drill shoe (10) includes one or more profiles thereon, into which blades (26) carrying the formation drilling cutters are disposed. The profiles include at least one projection thereon, which is received within a mating slot in the blades. The blades (26) also may be configured to have opposed sections which are configured with respect to one another to have an included angle (136) of less than ninety degrees.
Abstract:
The present invention is directed to a method and apparatus of locking out a subsurface safety valve (SSV) in a hydrocarbon wellbore. A lockout (100) tool is provided that is dimensioned to be received within the housing of the safety valve (50). The lockout tool generally comprises an elongated housing (120), and an expander mandrel (170) slidably received within the housing. Together, the housing and expander mandrel are run into the wellbore and landed into the housing (52) of the SSV such that the end of the expander mandrel opens the flapper valve. A portion of the lockout tool housing shoulders against the flow tube (54) in the SSV to drive the flow tube downward, thereby maintaining the flapper of the SSV in its open position. As the expander mandrel moves downward through the hard seat (58) of the SSV, the mandrel engages the flow tube and expands it against the hard seat. In this manner, the flow tube is expanded into permanent, frictional engagement with the hard seat. This, in turn, locks the flapper member (60) of the SSV in its open position.
Abstract:
There is disclosed a method of lining a drilled bore (10) and bore-lining tubing (12). The method comprises providing a first tubular (16); locating the first tubular (16) in the bore (10); providing an expandable, second tubular (22); locating the second tubular (22) in the bore (10) overlapping the first tubular (16); expanding a portion (24) of the second tubular (22) to create a coupling (29) including a flow passage (26) between the first tubular and the second tubular (16, 22).
Abstract:
The present invention generally relates to a valve for use in an oilfield tool. The valve includes a valve body (140) and a valve member (100) disposed in the valve body. The valve member is movable between an open and closed position. The valve member includes an aperture therethrough. The valve further includes a pressure relief member (105) disposed in the aperture, whereby at a predetermined pressure the pressure relief member will permit fluid communication. In another aspect, the invention provides an apparatus and a method for introducing fluid into a tubular.
Abstract:
The present invention provides a method and an apparatus for use in a wellbore tool. The apparatus includes a body (115) and a sliding member (155), wherein the sliding member and a mechanical portion (250) moves between a first position and a second position. A valve assembly (210) causes the sliding member and mechanical portion to shift to its second position at a predetermined flow rate of fluid through the body. The invention also provides an apparatus for a downhole tool that includes a mandrel and a sliding member disposed on the mandrel. The sliding member including a plurality of fingers (285) and a plurality of heads (275), wherein the plurality of fingers are slideably recessed within a plurality of longitudinal grooves (355). The invention further provides a collet assembly that includes a body and at least two extendable members (275), whereby as the members extend outward, the members are rotated.
Abstract:
A non-intrusive pressure sensor (14) for measuring pressures within a pipe (12) includes a displacement based sensor disposed on a surface of the pipe (12). The displacement based sensor (14) measures the radial displacement response of the surface of the pipe (12) to the unsteady pressure. The displacement based sensor may comprise an accelerometer, an absolute velocity sensor, or an absolute displacement sensor. One or more of sensors (14-18) may be axially distributed along the pipe (12) or alternatively the sensors (14-17) may be circumferentially distributed about the pipe (12).
Abstract:
There is disclosed, in one embodiment of the invention an expandable downhole tubular (10) comprising an expandable inner support tube (14) an expandable outer tube (18) ; and a filter tube (22) located between said inner support tube (14) and said outer tube (18), the filter tube (22) comprising at least one filter portion (24) and at least one extendable portion (28) coupling axial edges of said filter portion (24), said extendable portion (28) being extendable to accommodate circumferential expansion of said filter tube (22).
Abstract:
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.
Abstract:
The present invention discloses a whipstock assembly (100) for use in forming a lateral borehole from a parent wellbore. The whipstock assembly comprises a body (122) and a deflection member 120) above the body. The deflection member includes a concave portion (111) for deflecting a milling bit during a milling operation. Disposed on a perforation plate (110) portion of the concave portion is a raised surface feature (116). The raised surface supports a milling bit above the perforation plate portion during a milling operation. This, in turn, substantially prevents frictional contact between the milling bits and the perforation plate portion during a milling operation. The present invention also provides a novel method for manufacturing a whipstock in which a cavity portion is formed behind the perforation plate by milling out the backside of the deflection member and then joining a second back cover member to the whipstock body to complete the assembly.
Abstract:
A universal joint assembly (100) having a shaft and one or more housings. The housing (10) has an opening (35) for coupling with the shaft (20). The shaft pivots against a seat disposed in the opening during articulation. The joint assembly further includes one or more torque transmitting rollers (80) disposed in one or more roller slots (82) formed on the rotating surfaces. The shaft is retained axially using a retaining member (90) disposed beyond the torque section. The joint assembly is sealed from drilling fluids using a seal assembly (110) having a seal member (115) biased against a seal cap (12) disposed on the shaft. The joint assembly further includes a grease fitting (45) axially disposed for introducing grease into the joint assembly.