tailieunhanh - IADC Drilling Manual Part 7

Tham khảo tài liệu 'iadc drilling manual part 7', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Chapter J Pumps Figure J4-37 Protection of Studs while using Wedge-type Pullers Figure J4-37. When wedge-type pullers are used on pumps with stud-type valve pet covers a rag inserted in the crotch of the wedge will protect the studs. International Association of Drilling Contractors J-67 IADC Drilling Manual - Eleventh Edition Figure J4-38 Pulling the Valve Seat Figure J4-38. The valve seat is then pulled by striking the wedge with a sledge hammer. J-68 International Association of Drilling Contractors Chapter J Pumps Figure J4-39 Valve Seat Puller Assembly Figure J4-39. This photograph shows the entire valve seat puller assembly immediately after it has been removed from the valve pot. Hydraulic jack pullers employ the same type puller head as the wedge type only the stem is longer for the jack. Place the jack over the stem on the two piece block and install the nut. Insert the C washer between the top of the jack and the nut. Release the fluid return valve to compress puller . and bring the nut up as tight as possible. To prevent injury when the seat releases and pulls out of the deck secure a safety chain around the pulling assembly Figure J4-35. On duplex and single acting L head pumps all the valves are accessible from the top and may be changed easily. However on single acting cylinder head pumps the intake valve is directly below the discharge valve and requires a special pulling tool Figure J4-40. International Association of Drilling Contractors .

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