Petroleum well downhole logging tool with high speed data bus

A memory tool unit (2) connectable into a petroleum well downhole logging tool string (0) comprising a wireline telemetry controller unit (6) with a downhole modem (61) with a first data bitrate (r1) and arranged at least for transmitting data uplink on a wireline (8) to a surface telemetry unit (106) connectable to a surface read-out unit (SRO) with a memory (123), said downhole modem (61) connected to a server toolbus controller (62) connected to an internal toolstring databus (7) operating at a second bitrate (r2) being higher than or equal to said first bitrate (r1),

• said logging tool string further provided with one or more logging tools (4) each with corresponding low data volume sensors (40), and a client toolbus controller (42) connected on said databus (7), for being polled via said server toolbus controller (62) for transmitting sensor data (41a, 41b, 41c) from said sensors,
• said memory tool unit (2), different from the one or more logging tools (4), connected on said databus (7) and comprising a memory section (21) connected via a memory tool client toolbus controller (42m) to said databus (7) and communicating with said server toolbus controller (62),
• wherein said memory tool (2) further comprises:
• an internal local high speed data bus (3) operating at a third bitrate (r3) of 100 MB/s being higher than said second bitrate (r2), said memory section (21) connected to the internal local high speed data bus (3);
• an interface (23) to a corresponding interface (13) on a high data volume producing logging tool (1), different from the one or more logging tools (4) and the one or more memory tool units (2), said high data volume producing logging tool (1) comprising an ultrasound probe array with one or more sensors (1s) which provides a high data volume (11) at a bitrate equal to or lower than said third bitrate (r3) to the internal local high speed data bus (3) of the one or more memory tool units (2),
• said memory tool (2) arranged for transmitting a part (11s) of said high data volume data (11) via said databus (7) online to said server toolbus controller (62) during logging, and
• said memory tool (2) controlled by a uplink capacity indicator device (71) in said surface read-out unit (SRO) or toolbus server controller (62) arranged for negotiating transmission for uploading more parts (11s) of or all of said high data volume (11) via said server toolbus controller (62) to said surface telemetry unit (106) and said surface read-out unit (SRO) if said uplink capacity indicator device (71) indicates available uplink capacity.

A petroleum well downhole logging method comprising the steps of:

• running a logging toolstring (0) on a wireline (8) in a petroleum well and communicating with a server toolbus controller (62) in said logging toolstring (0) at a first bitrate (r1) of 250 kB/s or more from a surface read-out unit (SRO) with a memory (123),
• said server toolbus controller (62) controlling acquisition and uplink transmission of first volume sensor data (41a, 41b, 41c, . . . ) from one or more logging tools (4) connected on a toolstring databus (7) operating at a second bitrate (r2) of between 500 kB/s and 2 MB/s, higher than or equal to said first bitrate (r1), on said server toolbus controller (62),
• wherein said server toolbus controller (62) further controlling acquisition of data (11) from one or more high data volume producing tool (1), which is different from the one or more logging tools (4) and also connected on said databus (7), and controlling uplink transmission of parts (11s) of said high-volume data (11),
• sending said high-volume data (11) on a local high-speed data bus (3) of a corresponding memory tool unit (2) operating at a third bitrate (r3) of 100 MB/s, higher than said second bitrate (r2), from said high data volume producing tool (1) to the corresponding memory tool (2), the corresponding memory tool being different from the one or more logging tools (4) and the one or more high data volume producing tool (1), including a memory section (21) and said local high-speed data bus (3) operating at the third bitrate (r3) of 100 MB/s being higher than said second bitrate (r2), and also connected on said databus (7), and
• while an uplink capacity indicator (71) for said communication on said wireline (8) is positive, uploading more parts (11s) from said memory tool (2) via said toolbus (7) to said surface read-out unit (SRO) with said memory (123).