Method and apparatus, including hose reel, for cleaning an oil and gas well riser assembly

A method of cleaning an oil and gas well tubular riser section having a first riser section end and a second riser section end and a sidewall with an inner wall surface, comprising the steps of:

• a) providing a cleaning apparatus that comprises:
• a hose and a cleaning tool connected to the hose;
• a container in which the hose is housed, wherein the container has an inner drum having an inner drum sidewall and an inner drum floor, an outer drum having an outer drum sidewall and an outer drum floor, and an annular space between the inner drum and the outer drum wherein the annular space extends vertically to a top and a bottom of the inner drum sidewall and a top and a bottom of the outer drum sidewall;
• a wheeled chassis having a chassis bed, wherein the container is mounted on the wheeled chassis;
• a rotary fluid conveying swivel fitting at said inner drum floor, wherein the hose is connected to the swivel fitting through an opening in the inner drum sidewall;
• b) covering each riser section end with an end fitting having an end fitting opening;
• c) inserting the cleaning tool, which is configured to clean the inner wall surface, into the tubular riser section and through one of said end fitting openings, wherein said cleaning tool cleans the inner wall surface of the tubular riser section with cleaning fluid;
• d) removing the cleaning fluid of step “c” via gravity flow to a drain opening, wherein the removed cleaning fluid has a temperature of between about 100 and 180° F.;
• e) moving the cleaning tool with the hose, wherein a feed tool has rollers configured to selectively push or pull the hose;
• f) wherein the container rotates on a wheeled support in between the outer drum floor and an underlying support surface about a generally vertical axis when paying out or when retrieving said hose and
• wherein the hose moves through and relative to said opening in the inner drum sidewall.