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It is composed of valve body, valve core, valve sleeve, spring, end cap and filter plate.It has two position:by-pass and close. It is in by-pass position during trip operation, and circulates mud fluid in the drill string into the annular space by-passing the idle motor, so that no mud may spay out onto the platform during the drip operation. When mud flow rate and pressure reach the setting value, the valve core moves down and close the valve. Meanwhile,mud stream flows through the motor, and converts the pressure energy into mechanical energy. As mud flow rate is too low, or mud pump stops, and as the pressure produced is not enough to overcome the spring force and the static friction force, the spring presses the valve core upward, and by-pass is in open position. In general, the cross-over subs are used in deep well, large angle well, horizontal well or when hollow rotor is selected.
Weifang Shengde Petroleum Machinery Manufacturing Co., Ltd., founded in 2005, is a private joint-stock enterprise. The company is located in the international kite capital, with a covering area of 32,000 square meters and building area of 18,000 square meters. It is adjacent with the national Bailanghe Wetland Park, and has a good geographical location with convenient traffic and beautiful environment.
Weifang Shengde Petroleum Machinery Manufacturing Co., Ltd., is a specialized company who integrates the resratch and development, design and production as a whole. It is one of the Tier one suppliers for China National Petroleum (Group) Corporation, China Petroleum & Chemical (Group) Corporation in petrol drilling machinery manufacturing.
The company always adheres to the principle of technology, integrity, people-oriented, which makes us achieve a leap in the development. The company has passed ISO9001 certification and API certification in 2006 with the honor of "Shandong Province High-tech Enterprise","Advanced company in abiding by the contract and keeping promises","Business model in self-innovation","Patent star enterprise" and so on. The company has made dozens of national patents, some of which obtains the provincial and municipal outstanding new product award. In 2010, it got the National Technology Innovation Fund for Small and Middle Enterprise.
The company now has more than 200 employees, in which there are more than 40 engineers and technicians. The company has all kinds of advanced production and testing equipments with main products of series of down-hole motors, screw oil pumps and PDC bits. The quality of products is leading at home and abroad. The production capacity has reached 2,000 sets of down-hole motors series, 800 sets of screw oil pumps series. Products are sold to domestic and foreign markets with widely praise and recognition from customers.
Product Categories : Components And parts For Downhole Motors > By-pass Assembly And Parts
