IADC/13-01 Fall from V door results in near miss
The crew was in the process of preparing to lay down the directional tool. One crew member was running the hoist while the other was unchaining the snatch block from the handrail next to the V-door post. The crew member running the hoist was pulling slack from the lay-down line when it snagged on the substructure pulling the line tight and against the crew member standing next to the V-door post and the open V-door gate. The now tightened lay-down line pushed the crew member out of the open V-door and down the V-door slide where he hit the pipe stop and rolled onto the catwalk. The injured person sustained some minor swelling and discomfort to his back.
IADC/13-02 Lack of coordination during rig-up leads to injuries
During rig -up, rig personnel were attempting to install a diagonal stabilization brace on the substructure; however, the brace would not fit into place. A forklift was used to push the substructure which would allow the brace to line up and be pinned. At the same time, two employees were attempting to install the rolling catwalk directly over the open cellar (approximately15 feet/4.5m above ground level). When the forklift pushed on the substructure, the wheels of the catwalk, which the employees were standing on, sheared off. Both employees and the catwalk fell to the ground. One employee fell to the ground and the other fell into the cellar. Both employees suffered injuries.
IADC/13-03 Vessel to vessel transfer hose whiplash results in fatality
A vessel was instructed to supply base oil to a drillship working offshore. While completing the connection on the vessel’s manifold, the transfer hose was suddenly tensioned and snatched off the vessel’s manifold. The hose whiplashed around and struck an Able-Bodied Seaman(AB), which knocked him overboard. General alarms on both vessels were raised. The AB was recovered by the drillship’s rescue boat and was noted to have been suffering from multiple injuries. The injured AB was evacuated, by helicopter, to the nearest hospital where he passed away.
IADC/13-04 Lower Marine Riser Package (LMRP) Connector Failure
The U.S. Bureau of Safety & Environmental Enforcement has issued a Safety Alert as the result of a number of incidents on rigs caused by a loss of integrity of LMRP H-4 connector bolts. BSEE instructed the operators of affected rigs to secure current well operations and to retrieve the LMRP and/or BOP to the surface. These operators were directed to suspend operations until the existing bolts on the LMRPconnector / wellhead connector could be replaced or re-certified. Replacement bolts must be certified by an independent third-party to be in compliance with recommended heat treatment practices, or the existing bolts have been examined and certified by an independent third-party that they are fit for purpose.
While the BSEE Alert only affects rigs operating in the US Gulf of Mexico, IADC has been informed of at least one other similar failure occurring elsewhere. Contractors with rigs using H-4 connectors should take steps to ensure the integrity of these connectors to avoid potential failure.
IADC/13-05 Drill pipe dislodged from pipe bin during drifting operations
While using a drift mandrel to determine the inside diameter of the drill pipe and check for obstructions (rabbiting), a joint of drill pipe was knocked out of a vertical storage bin. To assist in the drifting operations, an employee was suspended in a man-cage above the pipe racks. The top of the joint of pipe came in contact with the cage-suspended employee’s foot. The contact dislodged the pipe from the vertical pipe storage bin and it fell outward towards the cab of the crane below where it entered the front of the windscreen and landed between the legs of the crane operator. The crane operator was unable to exit the crane cab prior to impact and sustained slight abrasions to his left calf
IADC/13-06 Poor communication amongst crew results in injury
The crew had just finished cutting the drill line and was preparing to lower the loose piece of drill line to the ground. The loose piece of drill line was tied off on one end to keep it from free falling to the ground, while the other end was lying on the rig floor on the off drillers’ side. The crew members on the rig floor were told to stay clear of the area in preparation for the drill line to be lowered to the ground. The Rig Manager was preparing the hoist line and a strap, which was to be used for this procedure, when another crew member mistakenly cut the rope that, was holding the drill line, thereby allowing the drill line to free fall to the ground. An employee, who was standing under the substructure, was struck with the piece of drill line as it fell to the ground. The injured employee suffered a cut/scrape from this incident that required first aid treatment only.
IADC/13-07 Improper hand placement results in minor injury
While drilling ahead, two employees were assigned to rig up the wire line machine. The attachment point for the wire line sheave is located under the transition plate between the hydraulic catwalk and rig floor (the plate hinges away from the floor). The two employees, together, lifted the transition plate so that one employee could show the other where to hook up the wire line sheave. After showing his co-worker where to install the sheave, they began to lower the transition plate back down. One employee decided to let go of the plate as it was getting close to the floor. The other employee had his right hand on the catwalk side of the plate and his left hand on the floor side. To keep from mashing his fingers between the plate and floor, he removed his left hand and continued to lower the plate. As he did, he felt a "pinch" to his right pinky finger, so he jerked his hand out and told the other employee that he thought he had injured his finger. It was found that his finger got caught between the transition plate and the metal plate supporting a bearing housing.
IADC/13-08 Caught between incident results in First Aid injury
While rigging down, the crew was preparing to disassemble the top drive track. An employee was to be hoisted to the crown to verify positioning and assist the carriage attachment to the top drive track. To accomplish his task, the employee needed to be hoisted up the mast on the driller’s side. After reaching the board area, the employee did not clear his foot from the approaching girt. His foot was caught between the girt, which subsequently pulled his boot off before freeing his foot from the girt. This resulted in minor swelling and discomfort to the employee’s foot, but the consequence for injury was much greater.
IADC/13-09 High pressure release results in injury
The maintenance team, consisting of three crew members, had been involved in stripping a pulsation damper’s bottom plate, which had a damaged seal groove. Prior to starting the task, the crew checked the pulsation damper gauge for pressure and verified a zero pressure reading. After unscrewing all flange mounting studs and Allen-screws from the bottom plate, the crew started to remove the bottom plate with the extractor studs, which enabled them to move the bottom plate slightly. As per the advice of the crew supervisor and in order to remove the stuck bottom plate, it was decided to utilize the two inserts in the gap between the bottom plate and dampener body in combination with the extractor studs.While two of the crew members forced the bottom plate open with wedges from opposing sides, another crew member (injured person), who was positioned in front of the bottom plate, was using the pneumatic spanner to screw-in the extractor studs.Without warning, the diaphragm burst out due to the pressure inside, resulting in the bottom flange being discharged from the pulsation dampener. The bottom plate struck the injured person on the thigh of his right leg, throwing him approximately 6 meters (20 feet) due to the differential pressure wave, and causing serious injury to his right leg.
IADC/13-10 Hot work operations results in dropped object
A third party construction company was carrying out the removal of various sections of grating from the derrick crown platform. The area had been prepared for the removal by setting up a pulley system and the grating was lashed through the perforations using retaining wire (the same type as would be used to lash scaffolding boards on to scaffolding). After the preparation work had been carried out the section of grating was cut free in order to lower it to the drill floor. At this point a section of grating measuring 70 x 37cm (2 ft x1 ft) and weighing 5.7Kg (13lbs) broke free and fell a distance of 52m (171ft) to the drill floor. The grating struck a section of the accommodation, fragmented into three sections and then all sections landed on the port side box girder of the rig.
IADC/13-11 Failure to properly make up the top drive/saver sub connection results in employee injury
After making up the Bottom Hole Assembly to spud in the well, the crew made up the first stand of drill pipe in the mouse-hole. The stand was then picked up, made up to the drill string and then the top drive was connected. As the drill string was picked up off the slips, the pumps were engaged to test the MWD tool. At this point the drill string pulled loose from the top drive saver sub and dropped approximately 3 feet (91cm)into the elevators. As the drill string dropped, the drill pipe screen came out of the top of the drill pipe and fell approximately 90 feet (27m) to the rig floor striking an employee in the left forearm, which resulted in a fracture.
IADC/13-12 Employee standing in line of travel results in injury
In order to replace the back pinon an iron roughneck, the rig crew was in the process of pulling the jaws loose from the body. To pull the jaw loose, the crew had connected the boom pole hoist line to the jaw in an attempt to pull it from the iron roughneck. Due to the angle of the hoist line,the load was in a bind and was pulling on the jaw in a way that did not allow the jaw to free itself. The crew continued working with the jaw and the hoist line trying to free the jaw. Suddenly, the jaw came free and shot across the drill floor, which resulted in it striking an employees’ lower leg which then struck the boom pole hoist.
IADC/13-13 Unsecured basket pin results in dropped objects
The traveling block struck the rod basket pin, knocking it out and causing it to fall to the rig floor. One side of the rod basket fell approximately 1 ½feet (46cm) to 2 feet (61cm) causing 4 stands of rods to fall out of the rod basket.
IADC/13-14 Mis-handled sub results in First Aid
While the crews were picking up the bottom hole assembly, two employees were trying to put a lifting strap on a handling sub to place it back in its storage area. While in an upright position,and not supported, the sub fell over striking one of the employees on the foot. The injured employee was treated with first aid and returned to work.
IADC/13-15 Unexpected Movement of Cargo Basket Results in First Aid Case
The Deck Crew was preparing a basket for back load and was loading it with guideposts. The guide posts were lowered in to the basket, but they were not sitting correctly. A crew member, injured person (IP), asked the Crane Operator to lift the load so as to allow for adjustment of the guideposts in the basket. As the load was lifted, it swung and knocked against the basket thereby dislodging it from the timber on the pipe deck beam. The basket came down to rest on the crew member’s foot. Instructions were then given to the Crane Operator to pick up the load and the crew member was able to remove his foot from his boot. The IP was Medevac’d from the rig on the day of the incident and x-rays confirmed that there were no broken bones.