Production logging tool and downhole fluid analysis probes deploying method

A production logging tool to analyze at least one property of a multiphase fluid mixture flowing in a hydrocarbon well while said tool is displaced along and within the well, comprising at least one measuring sub-section having an elongated cylindrical housing shape and comprising a central pressure-resistant rigid housing carrying a centralizer arrangement including a plurality of centralizer arms circumferentially distributed about said housing and operable from a retracted position into a radially extended position, said measuring sub-section in frictional engagement with a wall of the well, at least one downhole fluid properties analysis probe being secured on an inner or lateral face of each centralizer arm such as to expose a tip of said, at least one, probe to the multiphase fluid mixture flowing in the hydrocarbon well, wherein the production logging tool further comprises at least one guiding sub-section having an elongated cylindrical body shape along a longitudinal axis and comprising a central rigid stem having a first mechanical connector at one end and a second mechanical connector at an another end, at least one being arranged to be coupled with said measuring sub-section, and carrying a roller deploying arrangement comprising multiple external articulated arms circumferentially distributed about said body, each articulated arm comprising a roller assembly adapted for contact with a wall of the hydrocarbon well and operable from a retracted configuration into a radially extended configuration, the centralizer arms being coupled at a first side to the first mechanical connector and at a second side to a sliding sleeve arranged to slide on the central rigid stem, an axial spring extending around the central rigid stem and being disposed in abutment between the second mechanical connector and the sliding sleeve, wherein the roller assembly comprises:

• an arm hinge coupling a first arm part and a second arm part of each articulated arm and having an arm hinge axis substantially perpendicular to the longitudinal axis;
• a roller bearing secured onto the arm hinge and having a roller axis angled with respect to the hinge axis with an angle α set at a determined value alpha corresponding to a complete 360° tour over a determined displacement of the guiding sub-section along the well;
• and
• an anti-slippage friction roller received onto the roller bearing in a rotation free manner;
• such that running the production logging tool in the hydrocarbon well results in a rotation movement of the guiding sub-section and of the measuring sub-section of the production logging tool about the longitudinal axis.

A method of deploying a production logging tool in a hydrocarbon well, comprising the steps of:

• providing a production logging tool extending along a longitudinal axis comprising a measuring sub-section and a guiding sub-section coupled to said measuring sub-section, the measuring sub-section carrying a centralizer arrangement including a plurality of centralizer arms circumferentially distributed about said longitudinal axis and operable from a retracted position into a radially extended position of engagement with a wall of the well, said measuring sub-section in frictional engagement with a wall of the well, at least one downhole fluid properties analysis probe being secured on an inner or lateral face of each centralizer arm such as to expose a tip of said, at least one, probe to a multiphase fluid mixture flowing in the hydrocarbon well, the guiding sub-section carrying a guiding arrangement including a plurality of articulated arms circumferentially distributed about said longitudinal axis and operable from a retracted position into a radially extended position of engagement with a wall of the well, the articulated arms having respective radially outermost portions comprising roller assemblies configured to frictionally engage the wall of the well,
• running the production logging tool along the well while operating the centralizer arms and the articulated arms to radially extend into engagement with the wall of the well and to cause anti-slippage friction between said outermost portions comprising roller assemblies of the articulated arms and the wall of the well, said outermost portions comprising roller assemblies of the articulated arms are configured to cause the production logging tool to rotate around the longitudinal axis as a result of said friction around an axis angled with respect to the longitudinal axis of the production logging tool and of the running of the production logging tool along the well.