# Internal injuries to organs and blood vessels of the trunk at Pioneer Well Service
> OSHA SIR `2015020759` · 2/25/2015 · WILLISTON, NORTH DAKOTA
## Severity
- **2 hospitalizations**
- **Body part:** Chest, except internal location of diseases or disorders
- **Nature of injury:** Internal injuries to organs and blood vessels of the trunk
## Cause
- **Event:** Struck by falling object or equipment, unspecified
- **Source:** Derricks and related equipment
## Employer
- **Name:** Pioneer Well Service
- **Location:** 119 Well Street East, WILLISTON, NORTH DAKOTA, 58801
- **NAICS:** 213112
- **Jurisdiction:** 1
## Narrative

Two employees were hospitalized due to injuries sustained during maintenance operations on a workover rig in the maintenance shop. One employee suffered a crushing injury when a derrick floor fell on his chest, breaking ribs and causing a collapsed lung.  A second employee suffered a broken elbow due to a fall sustained while attempting to hold the falling rig floor.

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*Source: [OSHA Severe Injury Reports](https://www.osha.gov/severe-injury-reports) · MORVS · CC0 1.0*