USA has imposed restrictions against Gazprom's joint projects. Restrictions were imposed on Achimgaz, a joint venture with Germany's Wintershall Dea GmbH; RusGazAlliance, a joint venture between Gazprom and RusGazDobycha; Layavozhneftegaz, a joint venture with Lukoil; Frakjet Volga, a service contractor; and Gazprom Shelfproekt, which provides services for offshore oil and gas projects.