双层套管段铣器

Abstract

本实用新型涉及钻井设备附属装置的技术领域，特别是涉及一种双层套管段铣器，能够便利的完成种能够完成双层套管段铣作业，以满足双层段铣作业，从而提高了进行作业的工作效率和效果，因此增强了实用性；包括刀体、刀片、引导销、导轨、中心轴、推块、外管、中心杆、活塞件、活塞杆、活塞筒、弹簧帽、弹簧管、水眼、钢球、挡块、弹簧体和剪钉，所述刀体上面设有三道横切槽，横切槽侧壁装有七排引导销；所述刀片本体上有七排斜槽，与刀体上的引导销配合起导向作用；所述导轨安装在刀体三道横切槽内部，通过螺钉与刀体固定，导轨上有T型槽与刀片配合；所述挡块安装在刀体上，挡块上有限位点，限制刀片张开最大尺寸。

Claims

1. A dual casing segment miller characterized by, The device includes a blade body (1), a blade (2), a guide pin (3), a guide rail (4), a central shaft (5), a push block (6), an outer tube (7), a central rod (8), a piston (9), a piston rod (10), a piston cylinder (11), a spring cap (12), a spring tube (13), a water eye (14), a steel ball (15), a stop block (16), a spring body (17), and shear pins (18). The blade body (1) has three transverse cutting grooves, and the side walls of the transverse cutting grooves are equipped with seven rows of guide pins (3). The blade (2) has seven rows of oblique grooves on its body, which are connected to the blade body (1). The guide pin (3) cooperates to provide guidance; the guide rail (4) is installed inside the three transverse cutting grooves of the cutter body (1) and fixed to the cutter body (1) by screws. The guide rail (4) has a T-slot that cooperates with the blade (2); the stop block (16) is installed on the cutter body (1) and has a limiting point to limit the maximum opening size of the blade (2); the central shaft (5) is installed into the cutter body (1) and fixed by screws; the inner hole of the push block (6) is fitted into the outer shaft of the right end of the central shaft (5) and there are two O-ring seals in the middle; the central rod (8) and the push block (6) The outer tube (7) is connected by threads, and the ends are sealed by O-rings; the inner hole of the outer tube (7) is sealed with the push block (6) and the center rod (8) by O-rings, and is connected to the knife body (1) by threads; the piston (9) is connected to the right end of the center rod (8) by threads, and the end is sealed by O-rings; the piston rod (10) is connected to the right end of the piston (9) by threads, and the end is sealed by O-rings; the piston cylinder (11) is sealed with the piston (9) and the piston rod (10) by O-rings, and is connected to the outer tube (7) by threads; the spring body (17) is fitted into The piston rod (10) is positioned on the inner end face of the right end of the piston cylinder (11); the spring cap (12) compresses the spring body (17) and is connected to the piston rod (10) by threads, with the end sealed by an O-ring; the water eye (14) is inserted into the root of the inner hole of the spring tube (13) and sealed by an O-ring; the spring tube (13) is fitted with the spring cap (12), the spring element and the piston rod (10), and is connected to the piston cylinder (11) by threads; the shear pin (18) is screwed into the threaded hole on the side wall of the spring tube (13) and placed in the annular groove of the spring cap (12).

2. The bi-level casing segment mill of claim 1, wherein, The blade (2) can be either a window-breaking blade (2) or a segment milling blade (2). The window-breaking blade (2) is used to cut the casing wall in sections. Its weld alloy length is relatively short, and the torque during cutting is less than that of the segment milling blade (2). The segment milling blade (2) is used to perform segment milling on the casing wall after segment cutting. Its weld alloy length is relatively long, and the segment milling depth is relatively long. The double-layer casing segment milling machine can be equipped with either the window-breaking blade (2) or the segment milling blade (2) for different operations.

3. The bi-level casing segment mill of claim 2, wherein, The push block (6) has three protrusions. The protrusions of the push block (6) cooperate with the plane of the central shaft (5) to play a guiding role, and the end face of the protrusion of the push block (6) is placed on the root of the blade (2).

4. The bi-level casing segment mill of claim 3, wherein, As the central rod (8) moves upward, the through hole on its side wall will leave the sealing position of the outer tube (7) to open the through hole. Water flows through the water passage (14) inside the push block (6) and is sprayed onto the blade (2) to return the iron filings generated by the blade (2) during the cutting operation to the wellhead.

5. The bi-level casing segment mill of claim 1, wherein, The blade body (1), outer tube (7), central shaft (5), central rod (8), piston (9), piston rod (10), piston cylinder (11), spring tube (13), and stop block (16) are all made of high-strength alloy steel to improve the overall structural strength and meet the stress requirements in complex working environments.

6. The bi-level casing segment mill of claim 1, wherein, The surfaces of the guide pin (3) and guide rail (4) are all treated with wear-resistant material to reduce the coefficient of friction with the blade (2), improve its service life, and ensure the smoothness of the blade (2) during the guiding process.

7. The bi-level casing segment mill of claim 1, wherein, The O-rings are made of high-temperature and high-pressure resistant rubber material with good sealing performance to ensure the sealing of the joints of each component and prevent liquid leakage during operation.

8. The double-layer sleeve segment milling tool as described in claim 1, characterized in that, It also includes a connector, which is located on the top of the tool and is used to connect to the drill pipe. The connector has a sealing structure inside to prevent liquid from leaking from the connection point during operation.

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