Abstract: A depth positioning method to position a production logging tool (1) and a measurement log in a hydrocarbon well (3) in production obtained by means of the tool, the depth positioning method comprises: generating (S1, S2, S3, S1?, S2?, S3?, S11, S12, S13) a set of magnetic measurements (MAG1, MAG) of a depth portion of the hydrocarbon well from a first passive magnetic sensor along the depth portion of the hydrocarbon well, the set of magnetic measurements comprising magnitude and/or direction measurements of the magnetic field that forms a characteristic magnetic field pattern representative of a surrounding magnetic environment of the hydrocarbon well all along the depth portion; comparing (S4, S4?, S14) the set of magnetic measurements (MAG1, MAG) to another set of magnetic measurements (MAG_R, MAG2), the other set of magnetic measurements being a reference set of magnetic measurements generated either by a same or similar passive magnetic sensor deployed and run in the hydrocarbon well earlier, or by a

Abstract: A downhole optical chemical compound monitoring device (30) arranged to be integrated in a mandrel (20) of a drilling system, for monitoring a chemical compound in a drilling fluid (14B) circulated through a well (7, 8), the downhole optical chemical compound monitoring device (30) comprising: an analysis cell part (31) comprising an open cavity (40, 140) into which the drilling fluid (14B) is free to flow; a first optical probe (41A, 141A) coupled to a light source (157) and arranged to transmit a light energy into the open cavity (40, 140); a second optical probe (41B, 141B) coupled to a detector (158) and arranged to produce in use a signal resulting from an interaction of the drilling fluid (14B) present in the open cavity (40, 140) with said light energy, indicative of a quantity of chemical compound present in the drilling fluid (14B); each of said optical probes is mounted through a wall (38A, 38B, 138A, 138B) of the analysis cell part (31) in a sealed manner and has a tip (45A, 45B), the tip being

Abstract: A downhole local solid particles counting probe (1) for counting solid particles (101) in a fluid (100) present in a hydrocarbon well in production comprising: an elongated and flexible protective tube (2) defining an internal cavity (5) terminating by a membrane wall (3) defining a tip (4), the protective tube (2) and the membrane wall (3) isolating the internal cavity (5) from the fluid (100) of the hydrocarbon well, the protective tube (2) and membrane wall (3) are made of metal or metal alloy and have a thickness (ei) such as to resist to the downhole hydrocarbon well pressure; a passive acoustic sensor (6) mounted inside the internal cavity (5), the passive acoustic sensor (6) having a front side (7) mechanically coupled on the membrane wall (3) of the tip (4); a characteristic dimension of the passive acoustic sensor (6) is similar to solid particles (101) average characteristic dimension, ranging from 0.5 mm to 1.

Abstract: A downhole optical chemical compound monitoring device (30) arranged to be integrated in a mandrel (20) of a drilling system, for monitoring a chemical compound in a drilling fluid (14B) circulated through a well (7, 8), the downhole optical chemical compound monitoring device (30) comprising: an analysis cell part (31) comprising an open cavity (40, 140) into which the drilling fluid (14B) is free to flow; a first optical probe (41A, 141A) coupled to a light source (157) and arranged to transmit a light energy into the open cavity (40, 140); a second optical probe (41B, 141B) coupled to a detector (158) and arranged to produce in use a signal resulting from an interaction of the drilling fluid (14B) present in the open cavity (40, 140) with said light energy, indicative of a quantity of chemical compound present in the drilling fluid (14B); each of said optical probes is mounted through a wall (38A, 38B, 138A, 138B) of the analysis cell part (31) in a sealed manner and has a tip (45A, 45B), the tip being nee

Abstract: Probe for producing signals indicative of a local phase composition of a fluid flowing in a well, comprising a body of electrically insulating material having a tip adapted for contact with the fluid, at least two electrodes of conductive material located in the body on opposite sides relatively to a central axis of the body and insulated from each other, the electrodes having ends exposed to the fluid located on either side of the tip.

Abstract: A depth positioning method to position a production logging tool (1) and a measurement log in a hydrocarbon well (3) in production obtained by means of the tool, the depth positioning method comprises: generating (S1, S2, S3, S1?, S2?, S3?, S11, S12, S13) a set of magnetic measurements (MAG1, MAG) of a depth portion of the hydrocarbon well from a first passive magnetic sensor along the depth portion of the hydrocarbon well, the set of magnetic measurements comprising magnitude and/or direction measurements of the magnetic field that forms a characteristic magnetic field pattern representative of a surrounding magnetic environment of the hydrocarbon well all along the depth portion; comparing (S4, S4?, S14) the set of magnetic measurements (MAG1, MAG) to another set of magnetic measurements (MAG_R, MAG2), the other set of magnetic measurements being a reference set of magnetic measurements generated either by a same or similar passive magnetic sensor deployed and run in the hydrocarbon well earlier, or by a