Drilling Crew
A drilling crew is the team of personnel assigned to operate a drilling rig on a continuous shift basis — typically organized into day and night tours of eight or twelve hours — comprising the driller, assistant driller (or derrickman on some configurations), motorman, and floorhand (roughneck) positions under the supervision of the company man (company representative) and the toolpusher (rig superintendent), with each position carrying defined responsibilities for the safe and efficient operation of the drilling rig and the protection of personnel, equipment, and the wellbore.
Key Takeaways
- The driller is the crew member directly responsible for operating the drawworks, rotary table or top drive, and mud pump controls from the driller's console, making real-time decisions about weight on bit, rotary speed, and pump rate that govern drilling performance and respond first to any indications of wellbore problems such as gas kicks or lost circulation.
- The derrickman (or assistant driller) works in the derrick at the monkey board (pipe racking platform) approximately 90 feet above the rig floor during tripping operations, guiding drill pipe stands into the fingerboard and handling top connections, and also monitors the mud pit levels and mud system from the mud pits during drilling — making this position one of the most physically hazardous on the rig.
- Roughnecks (floorthands) perform the physical work on the rig floor — making and breaking drill pipe connections using tongs and iron roughnecks, handling drill collars, running casing, and operating the floor equipment — and represent the entry-level professional position in drilling from which crew members progress through the drilling career ladder.
- Shift handover (tour change) is a critical safety moment in drilling operations, requiring a formal verbal and written briefing from the outgoing driller to the incoming driller covering current well depth, mud weight, pit levels, last survey, any wellbore events, pending operations, and equipment status — inadequate handover has been identified as a contributing factor in multiple well control incidents.
- Modern integrated drilling crews also include specialized personnel who may or may not be counted as part of the "drilling crew" depending on the operator's structure: the mud engineer (monitors and treats the drilling fluid), the mud logger (monitors cuttings, gas, and drilling parameters), the directional driller (operates MWD/LWD tools and steers the wellbore), and the service company specialists for logging, cementing, and completion operations.
Fast Facts
A standard land drilling rig typically operates with two shifts (tours) of 4 to 6 crew members each, plus supervisory personnel (toolpusher, company man), for a total rig site population of 10 to 20 people including service company specialists. Offshore drilling rigs, which are larger and more complex, have larger crews — a semisubmersible or jackup typically employs 100 to 200 personnel per hitch covering all departments (drilling, mechanical, electrical, catering, safety, management). Crew rotations vary by jurisdiction and company: common patterns are 14 days on / 14 days off (offshore in many regions), 21/21, 28/14, or various shift rotations for land rigs where crew changes can be daily or weekly depending on proximity to the rig location.
What Is a Drilling Crew?
Drilling a well requires continuous 24-hour-per-day operations — the hole is always open and can deteriorate if drilling stops, kicks can occur at any time, and the rig investment justifies constant utilization. Drilling crews make this continuous operation possible by working in rotating shifts, with each crew fully responsible for safe rig operation during their tour of duty.
The crew hierarchy reflects both functional specialization and a career progression: roughnecks who learn the basics of rig floor work and pipe handling progress to motorman (maintaining and operating engines and mechanical equipment), then to derrickman (the pipe racking and mud monitoring role requiring more skill), then to assistant driller, and eventually to driller — a career arc that typically requires five to ten years of field experience before reaching the driller position on a complex rig.
The drilling crew works under the direction of two supervisory levels: the toolpusher (rig superintendent), an experienced drilling professional who oversees all operations on the rig site and reports to the operator's drilling engineer; and the company man (company representative or well site supervisor), employed by the operator company who is ultimately responsible for all decisions about the well — mud weight, casing points, testing procedures, and well control responses.
Drilling Crew Roles and Responsibilities
The driller occupies the most operationally critical position on the drilling crew, sitting at the driller's console and directly controlling the drawworks brake, top drive or rotary table, and communicating with the pump room to adjust mud pump rates. The driller monitors drilling parameters — weight on bit, torque, rotary speed, rate of penetration, standpipe pressure, and pit volume — in real time and is the first responder to any indication of a well control event. The driller's situational awareness and response time in the first minutes of a gas kick are the critical factors that determine whether the well can be safely closed in before the kick becomes an uncontrolled blowout.
The motorman is responsible for the rig's mechanical and power systems: engines, generators, mud pumps, and ancillary equipment. On modern rigs with integrated power management systems, the motorman's role has evolved toward monitoring and maintaining the mechanical plant rather than manually controlling power distribution. The motorman typically works in the pump room and engine room rather than on the rig floor during routine operations.
Roughnecks perform the most physically demanding rig floor work: making and breaking connections using manual tongs or iron roughnecks (automated tong systems), handling the drill string as it is tripped in and out, working around the rotary table, and assisting with running casing and completion equipment. Entry-level roughneck positions are the traditional starting point for a drilling career and require physical fitness, situational awareness around suspended loads and rotating equipment, and ability to work effectively in demanding weather and environmental conditions.
Drilling Crews Across International Jurisdictions
Canada (AER / CAOEC): The Canadian Association of Oilwell Drilling Contractors (CAOEC) sets training standards and safety performance benchmarks for WCSB drilling crews. AER Directive 036 (Drilling Blowout Prevention Requirements and Procedures) specifies the well control training and certification requirements for drillers and key crew members. Most WCSB land rig crews operate on 7-day or 14-day rotation schedules from rural Alberta base towns to the rig site. The WCSB drilling sector has been significantly mechanized — automated pipe handling and iron roughnecks have reduced rig floor manual labor requirements and improved safety for floor crews, though crew sizes remain relatively stable because more monitoring and technical roles have been added.
United States (IADC / BSEE): The International Association of Drilling Contractors (IADC) provides the most widely used well control certification program globally — WellSharp — which specifies training requirements for drillers and supervisors at different levels (Operations, Supervisory, Advanced) appropriate to their well control responsibilities. BSEE offshore regulations under 30 CFR Part 250 specify well control training and certification requirements for offshore drilling crew members, with the driller and company man required to hold current well control certificates. Texas and other land-drilling states have state-specific requirements administered through the Railroad Commission (Texas) and equivalent agencies.
Norway (Sodir / Equinor): NCS offshore drilling crews operate under the PSA Norway workforce regulations that specify competency requirements, working hours, rest period rules, and emergency response training for all offshore personnel. Equinor and other NCS operators require offshore drilling crew members to hold NOGEPA (Netherlands Oil and Gas Exploration and Production Association) or equivalent offshore safety training certificates and current BOSIET (Basic Offshore Safety Induction and Emergency Training) certificates for helicopter underwater escape. NCS drilling crews typically rotate on a 2-weeks-on / 4-weeks-off schedule for Norwegian nationals, reflecting the Norwegian offshore labor agreement.
Middle East (Saudi Aramco): Saudi Aramco drilling operations employ a large international drilling workforce supplemented by Saudi national employees in a nationalization program (Saudization) that targets progressive replacement of expatriate positions with Saudi nationals at all crew levels. Aramco's drilling contractor management system specifies minimum crew competency standards for all positions, with drillers and company men required to hold IADC WellSharp certifications. Crew rotations on Aramco rigs vary by contractor agreement — typically 28/28 for expatriate personnel, with different arrangements for Saudi national crew members based closer to the work sites.
Synonyms and Related Terminology
Drilling crew is also called the rig crew or tour crew. A single shift is called a tour (pronounced "tower" in oilfield usage). Related terms include driller, toolpusher, company man, roughneck, derrickman, tour, well control, and rig floor. The term "roustabout" refers to general labor on the rig site who performs maintenance, cleaning, and material handling but is not part of the drilling crew in the operational sense; roustabouts typically work for the rig contractor rather than having well-specific operational responsibilities.
Tip: The quality of shift handover is one of the most underrated factors in drilling safety and efficiency. A structured handover protocol — where the outgoing driller sits with the incoming driller at the console and walks through current depth, mud weight, the last 30 minutes of drilling parameters, any trends (increasing torque, pit level changes, gas shows), pending operations for the next tour, and any equipment concerns — takes 10 to 15 minutes but dramatically reduces the risk of the incoming driller being blindsided by a situation that developed on the previous tour. Many incidents have occurred within the first hour of a new tour because critical information was not transferred. Make the handover verbal AND written — a tour report in the company man's log that the incoming driller signs acknowledging they received the briefing.
FAQ
What is the difference between a toolpusher and a company man?
The toolpusher (rig superintendent) is employed by the drilling contractor and is responsible for the operation and maintenance of the rig — the equipment, the crew competency, and the mechanical efficiency of the operation. The company man (well site representative) is employed by the operator (the company whose name is on the exploration license) and is responsible for all decisions about what to do with the well — where to set casing, what mud weight to run, when to test the blow-out preventer, and how to respond to any wellbore event. The company man has authority over the program; the toolpusher has responsibility for executing the program safely with the rig and crew resources available. Both are present on the rig 24 hours per day, typically working 12-hour shifts with relief toolpushers and company men rotating to provide coverage.
How has automation changed drilling crew composition?
Automated pipe handling systems (iron roughnecks, pipe racking machines, automated catwalk systems) have reduced the manual labor on the rig floor and in the derrick, improving safety by removing crew members from the most hazardous positions during tripping operations. Modern automated rigs with top drives and automated connections can trip pipe with two floor crew members instead of the traditional four, and derrick work during tripping has been largely replaced by automated racking boards on the most modern rigs. However, crew sizes have not reduced proportionally because monitoring and intervention roles have grown: MWD/LWD data interpretation, integrated drilling optimization, and the increasing complexity of modern well construction programs require more technical specialists on the rig site than was typical in earlier eras of conventional drilling.