IADC/11-01 Sand Line flagging operation results in a fatality
A completions rig crew was attempting to attach flags to the rig sand line. After they had installed the third set of flags, the rig operator reached into the drum area to help one of the rig floor crewmen remove his pipe wrench from the sand-line. While reaching in, his stomach area came in contact with the sand-line drum clutch lever and engaged the drum resulting in the drum turning several revolutions. One of the rig crewmen became entangled, resulting in his death.
IADC/11-02 Lifting operation results in a fatality
A Service Company Supervisor (Independent Party [IP]) was fatally injured by a load during a lifting operation. The IP was present during the lifting operation to observe the movement of equipment. The Deck Foreman directed the IP to a safe location prior to commencing the lift.After the lift began, one of the Roustabouts holding a tag line queried an aspect of the rigging arrangement with the IP. During this brief exchange, one leg of the sling became caught under the cantilever stairway. The IP was out of the direct line-of-sight of the Deck Foreman and for unknown reasons moved into the lift area. When the sling became free, the load swung towards a nearby container and the IP was caught between the load and the container.
IADC/11-03 Laying down joint of casing results in a fall
After running casing, a floor plate was removed from the rig floor to access the cellar. A 20 foot piece of casing was cut off and hoisted with the rig floor air winch. Two rig floor workers were attempted to push the20 foot piece of 16” out the V-door. The load was too heavy for the two workers to handle and it started swinging back towards the rotary table. As the load came back, one of the workers fell through the opening in the rig floor. The worker fell approximately 22 feet and suffered a fracture at the base of his skull, a fractured right thigh and multiple bruising.
IADC/11-04 Transfer Pumps (Primer cap hazards)
A transfer pump on the reserve pit had stopped working.The driller alerted a crew member to shut down the pump and take the primer cap off to re-prime the pump if needed. The injured person (IP) shut off the transfer pump and began to open the primer cap by loosening the bolts on the top cap. Pressure from the pump blew the cap off resulting in super-heated mud spraying the crew member in the face. The injury resulted in 3rd degree burns to the IP’s face and neck with permanent injuries.
IADC/11-05 Fall incident during rig up results in fatal injuries
A drilling rig was being re-assembled on a new well location. The driller was working with a crane operator and another drilling rig employee to properly position the doghouse on the rig platform. To ensure the doghouse was in its proper position, the driller laid down on a folding work platform adjacent to the doghouse. The platform had been placed on the rig supports, but was not secured in place. As the driller moved out onto this platform it tilted and fell, causing him to fall 5 meters (16.5 feet) with the platform landing on top of him. The other drilling rig employee immediately summoned help. The platform was removed from on top of the employee and first aid was rendered. Following arrival of the emergency services, the driller was confirmed to have died.
IADC/11-06 Near-Hit Incident – Dropped Object pipe handling Push-Arm fell to the rig floor
While drilling a 12 ¼” hole, the driller observed the unused Safety Push Arm fall 15 feet (4.5 meters) onto the rig floor just in front of the Driller’s cabin. The arm caused dents to the rig floor cover plates. There were five (5) rig floor workers in the vicinity working near the V-Door, but luckily no one was injured and no other equipment was damaged. The piece of equipment that fell measured 12’ 6” long and 8” X 8” wide, weighing 882lbs. It had the potential to cause fatalities.
IADC/11-07 Adjusting the link Assembly on Pipe Spinner results in a Restricted Work Case (RWC)
The motorman (Injured Person [IP]) was requested to inspect and adjust the adjustable link assembly on the pipe spinner. The motorman (IP) was lining up the hole on the clevis of the adjustable link assembly with the hole on the operating arm using his left hand. At the same time he turned the air supply back on in order to move the operating arm into position. The IP operated the control valve with his right hand. The pressurized operating arm of the pipe spinner moved forward and contacted with the clevis of the adjustable link assembly. This caused in the clevis link to kick towards the main body of the pipe spinner. The IP’s ring finger was caught between the clevis link and the main body of the spinner which resulted in the tip of his ring finger being severed.
IADC/11-08 Unsecured guard results in MTO
While investigating a noise coming from the liner of mud pump #2, the Injured Person (IP) picked up the pony rod cover for the port side pony rod (each pony rod has its own cover). The liner cover dropped and fell inside the area where the pony rods are. While the pump was still running, the IP tried to remove the cover and the pony rod pushed the cover, pinching his finger between the cover and the pump body. The end of the right ring finger was pinched, breaking the skin and required stitches to close the wound.
IADC/11-09 Improperly mounted rig floor winch results in Hi-Potential Near Hit
During operations on the drill floor the crew was in the process of picking up riser through the V-door. They were using the 4500 kg winch for pulling back the riser to permit racking of the riser into the V-door. As the riser was being picked up, the winch bolts holding the winch to the pedestal failed and the winch broke free from its pedestal. When the winch broke free from its mount and was suspended by its wire rope, it swung sideways and smashed the glass on the doghouse door. The riser then slid back down the V-door and came to rest on the V-door stopper.
IADC/11-10 Improper use of sledhgehammer results in a Lost Time Accident
Employees were attempting to remove a valve seat from a mud pump module that was to be used as a spare. The valve seat puller being used was damaged while trying to remove the valve seat and the welder heated the seat in an attempt to loosen it. A sledgehammer was used to strike another sledgehammer face that was placed on the valve seat in an attempt to loosen and remove the seat when a piece of both the valve seat and sledgehammer face broke off. The broken piece of metal from the sledge hammer face penetrated the leg of the employee who was standing approximately 9 feet (3 meters) away performing fire watch duties.
IADC/11-11 Finger pinched in closing tong gate results in a Restricted Work Case
While closing the power tong gate on the rig floor the injured person’s (IP’s) right ring finger tip was pinched between the inner and outer power tong gates. The job was stopped immediately by the Tour pusher in charge and sent IP to see the rig medic for further treatment. IP was examined and sent to town for further medical examination and treatment.
IADC/11-12 Dropped Object – Low Pressure riser dropped 50 feet
A low pressure riser weighing four (4) tons dropped 50 feet (15 meters) from the diverter onto the platform below. The 25 foot (7.84 meter) long extension joint, or low pressure riser was secured in the rotary table in the diverter spider clamp and the diverter housing was mated to the extension and the securing ring made uptight using the C- spanner and hammer. Once it was secure, the complete assembly was picked up enough to release the spider clamp. The assembly was raised through the rotary table with two roughnecks guiding it to avoid any possible hang ups. No hang ups were noted and the weight indicator was closely monitored.At approximately four feet from clearing the rotary table, part of the assembly dropped down through the rotary table landing 50 feet (15 meters) to the platform below.
IADC/11-13 Rig Move – caught between Truck and Load
The rig moving crew was loading rig equipment in order to move to a new location. A Pre-Tour meeting had been held with both crews. A floorman (injured person[IP]) was caught between the generator house skid and the truck that was backing up to prepare to load the generator house. Another driver observed the IP caught between the truck and generator house and shouted for the truck driver to stop. Due to this driver’s attention, the IP avoided more serious injury. The IP was taken to the hospital for precautionary X-rays,which came back negative and he was released to return to duty. The worker suffered some pain at his chest area and minor bruising.
IADC/11-14 High Potential Near Miss - Dropped Object
The drill crew was tripping in the hole with 5 ½ inch drill pipe. The derrickman attempted to place a stand of drill pipe in the elevators but missed and the stand was dropped across the derrick. When the stand was being recovered it was pulled back to the fingers, it struck the fingers causing shaking and vibration to the derrick and monkey board. The motion caused a 12 lb.(5.4kg) speaker mounted at the back of the monkey board to break loose at the junction box. The derrickman was standing next to the speaker at the time the stand struck the fingers and was able to catch the speaker as it fell and it was brought down to the rig floor.
IADC/11-15 Welding operation results in a fire in the store room
Welders were trimming a guidepost located on the roof of the rig’s storeroom. The insulation installed on the underside of the storeroom roof that was located below the area of hot work ignited and began to smolder,emitting a large volume of toxic smoke. The store room sustained extensive smoke damage but, more importantly, there was a potential loss of rig equipment, materials and loss of life.
IADC/11-16 High Potential near miss – hoisting line disconnected from drawworks drum
During well service operations the hoisting line (tubing line) disconnected from the drawworks on a well service rig. There were no injuries or equipment damage but severity potential was high. Loss of the hoisting line clamp could have resulted in dropping the traveling block. Fortunately the traveling blocks were in an elevated position in the mast with twenty plus wraps of hoisting line on the drum.