(Bloomberg) Teekay Shipping Corp., the world?s largest oil-tanker owner, bought a 15 percent stake in Petrojarl ASA of Norway, challenging Prosafe ASA as ship and rig owners seek to expand in oil-production services.

Teekay bought 11.25 million Petrojarl shares, the Bahamas- based company said in a statement to the Oslo exchange today, without identifying the price or the seller.

Petroleum Geo- Services ASA, which spun off Petrojarl in June, said it sold its remaining 8.6 percent stake in the company for 60 kroner a share.

Teekay?s acquisition comes two days after Prosafe ASA, the world?s biggest owner of offshore platforms housing oil workers, agreed to buy 29.6 percent in Petrojarl. Prosafe, based near Stavanger, Norway, paid 50 kroner a share.

Shares in Petrojarl jumped as much as 7.25 kroner to 61.5 kroner as of 9:13 a.m. in Oslo, valuing the company at 4.6 billion kroner ($736 million).

Oil-service and shipping companies are seeking to increase their fleets of rigs and oil-production vessels as record oil prices spur producers to spend more on exploration and production.

Trondheim, Norway-based Petrojarl operates four ship-based oil-production ships known as floating production storage and offloading vessels, or FPSOs.

Separately, Bermuda-based Bergesen Worldwide Ltd. said it bought a 10.9 percent stake in Prosafe, raising its holding to 15.3 percent. Prosafe stock jumped as much as 28 kroner, or 7.5 percent, to 404 kroner, valuing the company at 17.7 billion kroner.