A packer system for a wellbore. The system includes a base packing element mounted to an inner surface of a first tubular and an actuator which actuates the base packing element in a radially inward direction. The system further includes a first trigger element disposed at the inner surface of the first tubular and operatively connected with the actuator, and a second trigger element disposed at an outer surface of a second tubular. The second tubular is displaceable in an axial direction with respect to the first tubular, wherein, upon displacing the second tubular at a predetermined position within the first tubular: the second trigger element engages with the first trigger element; and the first trigger element causes the actuator to actuate the base packing element in a radially inward direction, to bridge a space between the first tubular and second tubulars. Also disclosed and described is a related method.

An aggregate MRC well includes a plurality of maximum reservoir contact (MRC) wells, a plurality of independently operated flow control or completion units installed in each of the plurality of MRC wells, a plurality of pressure regimes corresponding to the plurality of MRC wells, and a single production string connecting each of the plurality of MRC wells. The method includes providing a plurality of maximum reservoir contact (MRC) wells forming an aggregate MRC well, providing a plurality of independently operated flow control valves in each of the plurality of MRC wells, providing a plurality of pressure regimes corresponding to the plurality of MRC wells, and providing a single production string connecting each of the plurality of MRC wells.

A system and method protect a packer during deployment in a borehole. The system comprises a shaft, the packer, a protective member, a movement mechanism, and an expansion mechanism. The shaft has a longitudinal length along a longitudinal axis extending in the borehole having an inner surface. The packer surrounds the shaft at a predetermined position along the longitudinal length. The protective member surrounds the shaft and is vertically positioned above or below the packer. The movement mechanism is configured to move the protective member to the predetermined position in order to surround the packer, thereby protecting the packer. The expansion mechanism is configured to expand the packer and the protective member when positioned around the packer to position the protective member in contact with the inner surface of the borehole. A method comprises steps performed during operation of the system.

A system and method protect a packer during deployment in a borehole. The system comprises a shaft, the packer, a protective member, a movement mechanism, and an expansion mechanism. The shaft has a longitudinal length along a longitudinal axis extending in the borehole having an inner surface. The packer surrounds the shaft at a predetermined position along the longitudinal length. The protective member surrounds the shaft and is vertically positioned above or below the packer. The movement mechanism is configured to move the protective member to the predetermined position in order to surround the packer, thereby protecting the packer. The expansion mechanism is configured to expand the packer and the protective member when positioned around the packer to position the protective member in contact with the inner surface of the borehole. A method comprises steps performed during operation of the system.

A backup including a gage ring having frustoconical surface and a groove in the frustoconical surface, a segment having a nose engaged with the groove, the segment having an overlap finger and a finger receptor, a wedge ring in contact with the segment, and a retainer member disposed to retain the segment. The downhole tool further comprising a second backup also adjacent the element and spaced from the first backup by the element. A borehole system including a borehole in a subsurface formation, a string dispose within the borehole, a backup disposed within or as a part of the string. A borehole system including a borehole in a subsurface formation, a string dispose within the borehole, a tool disposed within or as a part of the string.

A task is to provide a non-aqueous electrolytic solution exhibiting excellent cycle capacity maintaining ratio and excellent low-temperature resistance characteristics and a non-aqueous electrolyte secondary battery using the same. An object of the present invention is to provide a non-aqueous electrolytic solution which improves the cycle capacity maintaining ratio and low-temperature resistance characteristics, and a non-aqueous electrolyte secondary battery using the non-aqueous electrolytic solution. The present invention is a non-aqueous electrolytic solution comprising an electrolyte and a non-aqueous solvent dissolving therein the electrolyte, wherein the non-aqueous electrolytic solution contains a compound represented by formula (1) (wherein X represents an organic group containing a heteroatom, Y represents a sulfur atom, a phosphorus atom, or a carbon atom, n represents an integer of 1 or 2, m represents an integer of 2 to 4, l represents an integer of 1 or 2, and Z represents an organic group having 4 to 12 carbon atoms and optionally having a heteroatom), and a non-aqueous electrolyte secondary battery comprising the non-aqueous electrolytic solution.

The present invention provides a safety system (1) for protecting against a hazard of a drill rod failure in a drilled rock bore (B) above horizontal, and especially a hazard posed by a broken drill rod section (S) lodged within the bore (B). The safety system (1) comprises: a plug member (2) for insertion into a proximal end region (E) of the bore (B) adjacent a rock-face (F), the plug member (2) being configured to be fixed within the proximal end region (E) of the bore (B); and an impact reduction member (5) for reducing an impact of the broken drill rod section (S) striking the plug member (2) within the proximal end region (E) of the bore (B). The impact reduction member (5) is configured to be located within the proximal end region (E) of the bore (B) and to extend within the bore (B) above the plug member (2).

The present invention provides a safety system (1) for protecting against a hazard of a drill rod failure in a drilled rock bore (B) above horizontal, and especially a hazard posed by a broken drill rod section (S) lodged within the bore (B). The safety system (1) comprises: a plug member (2) for insertion into a proximal end region (E) of the bore (B) adjacent a rock-face (F), the plug member (2) being configured to be fixed within the proximal end region (E) of the bore (B); and an impact reduction member (5) for reducing an impact of the broken drill rod section (S) striking the plug member (2) within the proximal end region (E) of the bore (B). The impact reduction member (5) is configured to be located within the proximal end region (E) of the bore (B) and to extend within the bore (B) above the plug member (2).

A downhole sealing device, a well system employing a downhole sealing device, and a method for sealing within a wellbore. The downhole sealing device, in one aspect, includes one or more downhole sealing features, and an elastomeric element comprising a thiourethane/acrylate polymer coupled to the one or more downhole sealing features. In at least one aspect, the elastomeric element is operable to be compressed in a downhole application against a tubular as a seal.

Aspects of the subject technology relate to systems and methods for determining positions of cementing plugs during a cementing process. Systems and methods are provided for determining a length of an optical fiber line deployed into a wellbore for a cementing process, measuring signal intensity data as a function of distance from the optical fiber line, the optical fiber line being attached to a lower cementing plug and an upper cementing plug, the upper cementing plug being attached to the optical fiber line by an attenuation assembly, generating signal intensity profiles based on the signal intensity data as a function of a round trip delay of a light signal in the optical fiber line, and determining positions of the lower cementing plug and the upper cementing plug based on the signal intensity profiles of the optical fiber line.