China Oilfield Services Limited (COSL)

COSL’s current credit quality has a higher credit floor than an ordinary oilfield services company because it is a core services company under a Chinese central SOE group, but it does not have the standalone financial headroom of CNOOC Limited itself or Chinese policy-driven infrastructure issuers. Directionally, given full-year 2025 profit growth and strong operating cash flow, the near-term view appears stable to slightly positive. However, the 1Q 2026 negative operating cash flow, rising receivables, and higher capex mean that the interim results need to be reviewed before concluding that credit quality is improving. The probability of rapid credit deterioration is not high, assuming demand from the CNOOC group and current liquidity continue. But if a sharp oil-price decline, customer investment cuts, lower well-services margins, capex overruns, and working-capital deterioration occur simultaneously, the pace of change could be fast, as is typical for an oilfield services company.

The first support for COSL’s credit quality is the capital relationship with CNOOC and the large revenue base from CNOOC Limited Group. The fact that 78% of 2025 revenue came from related major customers is a constraint in terms of limited revenue diversification, but it is strong in terms of demand quality. As long as China’s offshore oil and gas development remains strategically important, COSL’s equipment, technology, and personnel are necessary functions for the group. This support expectation also affects access to bank and bond markets and refinancing capacity.

The second support is the 2025 financial performance. Revenue and operating profit increased, and operating cash flow comfortably exceeded capex. The total liability ratio was contained, and net interest-bearing debt was not excessive. The fact that a high-margin technical segment, well services, is the profit pillar also makes credit quality stronger than that of a simple equipment rental company.