Schlumberger Ltd. (NYSE: SLB) and Cameron (NYSE: CAM) have reached a definitive merger agreement in which the companies will combine in a stock and cash transaction, the companies said in a joint statement.

The deal is valued at $14.8 billion. The agreement was unanimously approved by the boards of directors of both companies.

“This agreement with Cameron opens new and broader opportunities for Schlumberger. At our investor conference in June 2014, we highlighted how the E&P industry must transform to deliver increased performance at a time of range-bound commodity prices,” Schlumberger CEO Paal Kibsgaard said. "With oil prices now at lower levels, oilfield services companies that deliver innovative technology and greater integration while improving efficiency, which our customers increasingly demand, will outperform the market.

Under the terms of the agreement, Cameron shareholders will receive 0.716 shares of Schlumberger common stock and a cash payment of $14.44 in exchange for each Cameron share, the release said.

Based on the closing stock prices of both companies on Aug. 25, 2015, the agreement places a value of $66.36 per Cameron share, representing a 37.0% premium to Cameron's 20-day volume weighted average price of $48.45 per share, and a 56.3% premium to Cameron's most recent closing stock price of $42.47 per share. Upon closing, Cameron shareholders will own approximately 10% of Schlumberger's outstanding shares of common stock, according to the release.

Schlumberger expects to realize pretax synergies of about $300 million and $600 million in the first and second year, respectively, the company said in the release. Initially, the synergies are primarily related to reducing operating costs, streamlining supply chains and improving manufacturing processes, with a growing component of revenue synergies in the second year and beyond. Schlumberger also expects the combination to be accretive to earnings per share by the end of the first year after closing.

The companies said the transaction combines two complementary technology portfolios into a "pore-to-pipeline" products and services offering to the global oil and gas industry. On a pro forma basis, the combined company had 2014 revenues of $59 billion.

“We believe that the next industry technical breakthrough will be achieved through integration of Schlumberger's reservoir and well technologies with Cameron's leadership in surface, drilling, processing and flow control technologies,” Kibsgaard said. “Deep reservoir knowledge further enabled by instrumentation, software and automation, will launch a new era of complete drilling and production system performance.

"In addition, we will achieve significant efficiency gains through lowering operating costs, streamlining supply chains, and improving manufacturing processes while leveraging the Schlumberger transformation platform,” Kibsgaard said. “We look forward to welcoming the talented employees of Cameron and are pleased that they will be joining the Schlumberger team as our fourth product group."

Cameron CEO Jack Moore added, “This exciting transaction builds on our successful partnership with Schlumberger on OneSubsea and will position Cameron for its next phase of growth. For our shareholders, this combination provides significant value, while also enabling them to own a meaningful share of Schlumberger.”

The transaction is subject to Cameron shareholders' approval, regulatory approvals and other customary closing conditions. It is anticipated that the closing of the transaction will occur in the first quarter of 2016, the release said.

Goldman, Sachs & Co. is acting as financial advisor, and Baker Botts LLP and Gibson Dunn & Crutcher LLP are serving as legal counsel, to Schlumberger. Credit Suisse is acting as financial advisor and Cravath, Swaine & Moore LLP is serving as legal counsel to Cameron.