A production logging tool (1) to analyze at least one property of a multiphase fluid mixture (MF) flowing in a hydrocarbon well (2) has an elongated cylindrical housing (10, 12, 13, 14) shape and comprises a central pressure-resistant rigid housing (10, 12, 13, 14) carrying a centralizer arrangement (11) comprising multiple external centralizer arms (15, 16) circumferentially distributed about said housing (10, 12, 13, 14) and adapted for contact with a production pipe wall (6) of a hydrocarbon well (2) and operable from a retracted configuration into a radially extended configuration, the centralizer arms (15, 16) being coupled at a first side to the housing (10, 12, 13, 14) and at a second side to a first sliding sleeve (21) and a first spring (24). The production logging tool (1) further comprises a deploying arrangement (30) nested within the centralizer arrangement (11), the deploying arrangement (30) comprising: a plurality of deploying arms (31, 32) circumferentially distributed about said housing (10, 12, 13, 14) and being coupled at a first side to the housing (10, 12, 13, 14) and at a second side to the centralizer arrangement (11) by means of at least one second sliding sleeve (36) such that each deploying arm (31, 32) is circumferentially positioned between two centralizer arms (15, 16) whatever the retracted or radially extended configuration of the centralizer arrangement (11), at least one downhole fluid properties analysis probe (55, 55A-55H) being secured on each deploying arm (31, 32) such as to expose a tip (51) of said, at least one, probe to the multiphase fluid mixture (MF) flowing in the hydrocarbon well (2).

The second sliding sleeve (36) comprises a mechanical coupler (39) coupled to the first sliding sleeve (21) such that the deploying arrangement (30) follows radial movements imposed by the centralizer arrangement (11) to radially and/or angularly position the tip (51) of said, at least one, probe (55, 55A-55H) associated with each deploying arm (31, 32) in a first circumferential zone (CZ1) of a hydrocarbon well section substantially perpendicular to a longitudinal axis (XX′) of said well (2).

A system includes a wear bushing retrieval tool. The wear bushing retrieval tool an annular main body configured to be disposed about a tubular string, a plurality of locking dogs, wherein each locking dog of the plurality of locking dogs is pivotably coupled to the annular main body, a first axial securement feature coupled to the annular main body, and a second axial securement feature coupled to the main body, wherein the first and second axial securement features are configured to cooperatively axially capture a coupling of the tubular string when the annular main body is disposed about the tubular string.

A system includes a wear bushing retrieval tool. The wear bushing retrieval tool an annular main body configured to be disposed about a tubular string, a plurality of locking dogs, wherein each locking dog of the plurality of locking dogs is pivotably coupled to the annular main body, a first axial securement feature coupled to the annular main body, and a second axial securement feature coupled to the main body, wherein the first and second axial securement features are configured to cooperatively axially capture a coupling of the tubular string when the annular main body is disposed about the tubular string.

A system for fluid monitoring in a borehole for extracting hydrocarbons includes a casing to transport hydrocarbons, the casing defining an annulus between the casing and borehole wall. The system further includes a centralizer, coupled to the casing, to center the casing within the borehole. The system further includes a sensor unit, including a radio frequency identification (RFID) interrogator, positioned on the centralizer to monitor one or more fluids, including RFID tags, in the annulus.

A shaft enlargement arrangement for a boring system is provided, the shaft enlargement arrangement comprising a hollow column proximate a lower end of the boring system; a first cutter head that is rotatably fitted to the hollow column, with first drive means being provided to rotate the first cutter head relative to the hollow column so as to bore downwardly a hole having a diameter corresponding substantially to the diameter of the first cutter head; and a boring head arrangement fitted to an operatively lower end of the column, the boring head arrangement terminating in a second cutter head to bore a leading hole as the boring system proceeds to bore downwardly. In an embodiment, the first cutter head comprises a support body carrying a winged arrangement, the support body being rotatably fitted to the column, the winged arrangement comprising a plurality of wings extending from the support body, each wing being fitted with, or comprising, a plurality of first cutter elements.

A well tool for sensing seismic activity at a downhole location has an anchoring mechanism for mechanically coupling the tool to a formation by contact engagement with a wall of a subterranean cavity in which the well tool is located. The anchoring mechanism is deployable by a pressure-triggered hydraulic actuator incorporated in the tool. The actuator is configured for pressure-triggered activation and for hydraulic actuation by agency of borehole fluids (e.g., drilling mud). The actuator can provide a persistent contacting force urging the anchoring mechanism into contact with the cavity wall, to promote firm coupling with the formation for seismic sensoring purposes.

The invention provides a downhole borehole traction apparatus (10) and method of use. The apparatus comprises a body comprising a borehole engaging section wherein the borehole engaging section comprises an outer surface comprising at least one thread. The at least one thread comprises a crest surface (32), a leading surface (30), and a trailing surface (28) having a curvilinear shape. The at least one thread has a low pressure generation means comprising one or more formations.

A centralizer for use in a wellbore includes a body for disposing around a periphery of a downhole tubular. The body has a plurality of bow springs biased toward an expanded position and a pair of end rings connecting the bow springs. The centralizer further includes an indentation or row of indentation segments formed in a surface of and along each bow spring. The indentations or indentation segments are operable to reduce a stiffness of the centralizer as the bow springs move from the expanded position to a restricted position.

A downhole tool includes a tool body and an actuator coupled to and selectively extendible relative to the tool body. The actuator has a working face that contacts a downhole formation, and which includes an upper portion and a lower portion. The lower portion has a tapered surface that is directed radially inwardly and axially downwardly relative to the first portion, with at least a portion of the tapered surface including an ultrahard material having a different coefficient of friction as compared to a first material of the upper portion.

A modular anti-rotation device for preventing rotation with respect to the central axis of a drilling tool in a borehole and for producing a notch in a borehole surface. The anti-rotation device includes an upper fixture portion and a lower fixture portion in axial alignment. The upper fixture portion and the lower fixture portion are connected by yoke assemblies. Each yoke assembly is connected to the fixture portion and fixture portion at one end, and forming an articulated joint of the upper yoke assembly and the lower yoke assembly at a distal end opposite the first end. A roller is connected at each joint, connecting the upper and lower yoke assemblies. The rollers engage vertically with a borehole surface, the rollers travelling axially, as a drill shaft penetrates into the borehole, the rollers simultaneously preventing radial movement of the anti-rotation device and prevent rotation with respect to the central axis of the borehole.