Glossary

Drilling fluid is any of a number of liquid and gaseous fluids and mixtures of fluids and solids (as solid suspensions, mixtures, and emulsions of liquids, gases, and solids) used to aid the drilling of boreholes into the earth.

Drilling mud is usually synonymous with drilling fluid.

A drilling rig is a large structure with equipment used to drill oil wells and natural gas extraction wells.

Driver's Privacy Protection Act (DPPA) of 1994 prohibits a state department of motor vehicles from disclosing an individual's personal information, except as specifically allowed by the DPPA.

A drive other car (DOC) endorsement (CA 99 10) is a commercial auto endorsement designed to provide nonowned auto coverage under a commercial auto policy similar to that which would be provided under a personal auto policy (PAP). The Drive Other Car Coverage—Broadened Coverage for Named Individuals (CA 99 10) endorsement is commonly used when an executive officer, for example, does not carry personal auto insurance because he or she is furnished a company auto. Coverage under the endorsement would come into play in the event the individual designated in the endorsement (including his or her resident spouse) is driving a nonowned auto for personal use. Coverage under the endorsement does not apply if the auto in question is owned by that individual or by any member of his or her household; or the auto is used by either of these individuals while working in a business of selling, servicing, repairing, or parking autos.

A drone, or unmanned aircraft, is an aircraft that is operated without the possibility of direct human intervention from within or on the aircraft.

Dropped medical malpractice claims refers to the phenomena that the most frequent outcome of a medical malpractice claim is that it will be "dropped" (i.e., abandoned) by the claimant, rather than either (1) settled or (2) adjudicated in a court of law.

A drop down provision is a clause in umbrella policies providing that the umbrella will "drop down" over reduced or exhausted underlying policy aggregate limits.

Druggist liability insurance is a form of professional liability insurance protecting the druggist against suit arising out of the filling of prescriptions, misdelivery of drugs, and other operations.

A dry pipe sprinkler system is an automatic sprinkler system that can be used in an unheated building without risk of freezing and subsequent bursting of pipes, because the system fills with water only when the sprinkler heads are triggered by the heat of a fire.