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Control of Well Insurance: What It Is and Why It Matters

In the oil & gas industry, even a seemingly minor incident like a leak or partial loss of well control can trigger significant financial, regulatory, and operational consequences. That’s where Control of Well (COW) insurance comes into play.

Quick Links:

What is Control of Well Insurance?
What Does Control of Well Insurance Cover?
What Are the Key Features to Look for in a Control of Well Insurance Policy?
What are the Benefits of Control of Well Insurance for Oil and Gas Professionals?
Are There Alternatives to Control of Well Insurance?
Why Control of Well Insurance Matters—Especially for Small to Midsize Businesses
How Much Does Control of  Well Insurance Cost?
Why Brokers Should Care

What is Control of  Well Insurance?

COW insurance, also known as Well Control insurance or Operator’s Extra Expense (OEE) coverage, is a highly specialized product that protects oil & gas-related businesses from well-failure expenses, which can extend far beyond just regaining control of the well itself.

At Kinsale, our Control of Well product is designed for small to midsize operators, non-operators, drilling contractors, and well-servicing companies whose annual revenue could be exceeded by a single event in days, or even hours. While sometimes considered a “nice to have” coverage, we know that Control of Well insurance can be a vital safeguard against a potentially devastating loss.

What Does Control of Well Insurance Cover?

Though available features may vary and are subject to policy terms, conditions, exclusions, and limits, Kinsale’s Control of Well policies can help cover:

• Costs to regain control of the well: e.g., shut‑in, kill operations, snubbing, capping, or plugging
• Costs to restore or redrill the well if it has been damaged
• Costs of pollution clean‑up resulting from the event
• Costs of damage to onsite, third-party equipment under the policyholder’s care, custody, and control (CCC) during a well control incident

Our Control of Well coverage can also be tailored to unique risks with optional enhancements, including:

• • Underground COW coverage
  • Extended re-drill or recompletion
  • Making wells safe
  • Wreckage and debris removal
  • Turnkey well coverage
  • Evacuation expenses
  • Deliberate well firing

What are the Key Features to Look for in a Control of Well Insurance Policy?

When evaluating a Control of Well policy, brokers and their clients should consider the following elements:

• Flexibility: Oil & gas businesses come in all sizes. It’s important that the policy can be structured in a way that makes coverage financially accessible to smaller operations.
• Optional endorsements: Every project is unique and optional endorsements, such as underground coverage, extended re-drill, or debris removal, allow for customization.
• A broad appetite: Our Energy team provides coverage for traditional (oil, gas, and saltwater/injection) and non-traditional (geothermal and hydrogen) wells in various stages and zones, including:
  • Drilled
  • Workover
  • Producing
  • Shut‑in
  • Plugged & abandoned
  • Wells in rating areas 1, 2, and 2 wet.
• Coordination with other policies: When COW coverage complements other coverages, it’s easier to build a comprehensive protection strategy. For example, Kinsale’s COW policies are standalone, but work easily alongside our Energy Property and General Liability.

What are the Benefits of Control of Well Insurance for Oil & Gas Professionals?

Control of Well insurance provides benefits through:

• Risk transfer for well failures or redrilling events, ensuring an operator isn’t left with an unmanageable financial hit.
• Enhanced reputation for safety, which is, in turn, attractive for bids
• Coverage for gaps left by other policies

Additionally, while major blowouts may make the biggest well failure headlines, even a small leak can quickly lead to substantial losses with liability often shared among multiple parties. Kinsale’s coverages are designed to benefit:

• Lease operators who carry primary responsibility for controlling a well and can be held directly liable for expenses related to well failures, redrilling, cleanup, and third-party damages.
• Non-operators (working interest owners) who, while not primarily responsible, may be liable for additional expenses not covered by an operator’s policy.
• Drilling contractors, especially those using their own equipment and crews, who could be held liable if a well blowout appears to be due to equipment failure, procedural error, or operational error.
• Well servicing or workover companies, including wireline, coiled tubing, and other specialty crews, who can be held legally responsible for related costs if something goes wrong during a well intervention or maintenance operation.

Are There Alternatives to Control of Well Insurance?

There are other policies that may respond to portions of what COW policies encompass, but Control of Well insurance delivers a highly specific, highly specialized solution for oil and gas professionals exposed to significant financial loss after a well failure event. For example:

• Environmental liability or pollution policies may cover spills/leaks, but typically exclude well control, redrill, or loss of control events.
• Standard General Liability or Property policies often exclude well coverage and create costly gaps. Our Control of Well Quick Guide highlights some of these common coverage gaps.
• Strong risk-management, service-contractor agreements and contingency planning, while essential, don’t replace an insurance program—they complement it.

With a COW policy in place, operators and contractors can have greater confidence that whether an event ends up costing $200,000 or $2 million, they will have the help they need to recover, remediate, and reinstate operations quickly.

Why Control of Well Insurance Matters—Especially for Small to Midsize Businesses

State Regulations

States, particularly major oil & gas-producing states like Texas, New Mexico, Oklahoma, Pennsylvania, and Louisiana, have financial responsibility regulations for oil & gas well projects; however, those regulations vary widely by state, project type, and number of wells.

State requirements may include insurance, such as Control of Well, surety bonds, or financial tests to ensure a company’s ability to cover potentially high-cost well failures or incidents. While large companies may self-insure or establish captive insurance programs, small to midsize operations often lack that level of capital and may be tempted to fulfill only minimum state requirements or go “bare” if legally viable.

For example, in Texas, operators of 10 or fewer wells are required to post a minimum $25,000 blanket performance bond, with higher amounts required if well counts go over the 10-well threshold. While the bond satisfies regulatory requirements, operators that carry only the minimum bond could remain financially responsible for any costs exceeding the bond amount.

What a Well Failure Could Cost a Small Operator

When a well control event occurs, whether it’s a full blowout, a minor leak, or a workover gone wrong, the financial exposure can be severe. Even routine loss of control or remediation events can push costs into the millions. Based on anecdotal industry data from a leading well control remediation provider, many claims from smaller operations come in around or just under $2 million. But it doesn’t take much to reach—or exceed—that number.

Imagine this scenario:

A small operator in the Permian Basin experiences a gas influx event during horizontal completion. The event then escalates to a well control incident lasting nine days.

While the event above is not a billion-dollar blowout, for a small operation without dedicated coverage in place, a multi-million-dollar mishap like the one described could feel the same.

How Much Does Control of Well Insurance Cost?

When determining COW coverage costs, insurance carriers typically start with the Authorization for Expenditure (AFE). The AFE is an important tool for project planning, budget control, and providing financial transparency to stakeholders and investors by outlining expected capital costs, justification for the project, and potential risks.

Traditionally, insurers calculate the required COW limit, and subsequently the premium, at roughly three times the AFE, based on the assumption that a worst-case well failure event could cost triple the anticipated well budget. While that 3x model may work for deep or complex operations, it often overestimates the exposure for smaller wells.

Because most claims from small and midsize operators come in at around $2 million, Kinsale takes a more flexible—and realistic—approach. We can write below the traditional 3x AFE threshold, ensuring that the premium matches the risk. Plus, we offer optional enhancements, allowing insured’s to choose additional policy features, and consequently, control their costs. We offer:

• $5,000 minimum premiums for $1M limits
• $11,000 minimum premiums for $5M limits
• Deductible options ranging from $25,000 to $150,000

*Premiums, limits, and deductibles are subject to underwriting, risk characteristics, and jurisdiction.

Why Brokers Should Care

Given the high costs associated with even moderate well control incidents, adding COW insurance to a client’s risk‑management portfolio is a strategic protection tool. Brokers who can place viable solutions for smaller accounts, which are traditionally underserved, bring meaningful value to their clients, build trust, and increase renewal opportunities.

Understanding the ins and outs, and most importantly, the value, of Control of Well insurance puts brokers in the position of advisor as well. They can help agents and clients grasp how severe the financial consequences of a well failure can be and why this coverage should be prioritized.

In summary, for brokers working in the oil & gas sector, making Control of  Well insurance part of the conversation means helping operators and contractors protect their production, as well as their financial stability, regulatory compliance, and business continuity.