Event

Operation Type

Incident Description

Incident Type

Potential

Drilling – Jarring

While jarring down hole the cover from the top drive system (TDS) blower motor fell off the top drive approximately 25-feet to the rig floor. The dropped object landed just 1-ft from a floorman who was bent over performing housekeeping duties on the rig floor during jarring operations.

Dropped Object

Potential

Drilling – Tubular Handling with Forklift

Telehandler forklift operator was about to unload 13 3/8” casing from a 3rd party truck. When the forklift operator tried to lift two joints of casing from the upper layer, a joint of casing from the 3rd layer moved to the opposite side of the telehandler, bent the trailer bolsters/side bars and 3 joints dropped to the ground. The casing landed just 3-feet from the truck driver who was on the opposite side of the trailer removing his load binding straps.

Forklift

Potential

Drilling – Rig Down

While preparing to remove pins out of the center steel section of the rig substructure during rig-down, an employee was attempting to utilize the forklift to raise the pin high enough to remove it by hand. As floorman #1 was trying to see where pin was positioned, the pin ejected and struck him above his left eye causing a laceration 1.5 inches in length and a concussion.

Pinning Loads

Potential

Drilling – Cementing

Cementer made up cross over into top of the casing and placed cement head onto cross over. Driller filled 5.5" casing then turned off pump. He turned pump back on at 30 strokes per minute (SPM) in order to burst the air bladder. At 429 PSI the cross over popped out of the top of the casing string about 12 inches. The cross over landed on the floor. Closest person was 15 ft from well center standing at the V-door. No one was injured. The cement head and crossover landed next to the ladder of the mast. Upon inspection the cross over was an 8 round thread instead of the buttress thread on the casing collar. Incompatible thread profiles.

High Pressure

Potential

Drilling – Running Casing

Employee rolled a joint of casing onto the catwalk indexers. The joints behind him started to roll. He turned around to stop the joints from rolling. The catwalk operator engaged the indexers causing the joint on the indexers to roll back and strike employee in the back.

Rolling Tubulars

Potential

Completions

A crew member was in the process of rigging up a night cap (200 lbs.) to remove it from the well head when the device unexpectedly shifted and fell to the ground. The crew members failed to establish a Buffer Zone underneath the area where the object was being lifted.

Dropped Object

Potential

Production

Workers were adjusting the alignment of the pumping unit using a "Porto-Power" hydraulic tool. The worker was standing to the side of the tool while it was pushing the pumping unit into position. The tool unexpectedly kicked out striking the worker.

Rigging-up

Potential

Coil Tubing Operations

During Coiled Tubing operations, a worker reported a power hose fitting failure on the injector head. Closer inspection revealed that the crimped connection on the hose cracked and residual pressure in the system caused the fitting to travel 23’ across location. The closest worker was 6’ away from the fitting at time of incident.

High Pressure

Potential

Pressure Testing

During pressure test for pump down operations, a bonnet separated from the body of a 2” check valve on the flowback iron between the sand trap and a gate valve. The job was shutdown. Upon investigation, it was determined that the 2” check valves’ working pressure was rated for only 2000 psi. The pressure test was to 5000 psi and the failure occurred at 4800 psi. As a result of the failure, the bonnet (weight 1.75 lbs) traveled a distance of 177’ landing off the side of location. Buffer zones were being adhered to at the time of the incident with the closest person being approximately 53’ away at the testing unit. No injuries resulted from the event.

Projectile Under Pressure