Shengli Oilfield Bohai cementing engineering technology Co., Ltd. business scope: cementing engineering contracting and technical services; class II motor vehicle maintenance (large and medium bus maintenance; large and medium truck maintenance; small vehicle maintenance); general cargo and special cargo transportation; drilling program contracting; downhole tools, expansion agents, retarders, prepositions, drag reducers, fluid loss reducers, Zaoqiang Production and sales of agent, defoamer, low-density modified fly ash, bulk material dry mixed petroleum machinery parts and auto parts; sales of cementing additives (excluding dangerous goods); internal labor output of oil field; petroleum equipment and house leasing; property service and cleaning service; marriage service; travel agency and related services; greening management; stationery, sporting goods and equipment sales; Construction engineering labor subcontracting; special equipment repair.