Sectioning type slips centralizing protector for continuous oil pipe
A split type, protector technology, applied in drill pipe, casing, production fluid and other directions, can solve the problems of easy bending, easy breakage, non-centering, etc., to achieve the effect of simple structure, easy installation and disassembly
Active Publication Date: 2020-08-21
PETROCHINA CO LTD +1
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Problems solved by technology
[0004] In order to overcome the shortcomings of the existing coiled tubing that are not centered, easy to bend and easy to be damaged after being lowered into the horizontal section during multi-cluster fracturing, the present invention provides a split-type slip centralizer for coiled tubing. The petal-type slip backing protector can ensure that the coiled tubing is centered in the horizontal section, and the coiled tubing will not be eroded during fracturing, and cooperate with the fracturing string to realize coiled tubing bottom seal drag multi-cluster perforation volume fracturing
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[0018] The present invention will be further described below in conjunction with accompanying drawing:
[0019] Depend on Figure 1 to Figure 4 As shown in the figure, a split-flap type slip righting protector for coiled tubing includes an upper joint 1 and a lower joint 10. The upper joint 1 is formed by inserting two monomers through a T-shaped slot, and the lower joint 10 is connected to the upper joint. Joint 1 has the same structure and opposite directions, and is also formed by plugging two monomers. The upper joint 1 is provided with an upper extruding ring 2, the upper extruding ring 2 is provided with an upper deformation ring 3, and the inner wall of the upper deformation ring 3 is provided with clamping teeth, and the upper extruding ring 2 and the upper deformation ring 3 are composed of two monomers with the same structure, which are placed inside the upper joint 1 to form a whole. The lower part of the upper deformation ring 3 is evenly distributed with several...
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The invention discloses a sectioning type slips centralizing protector for a continuous oil pipe. The problems that during multi-cluster fracturing, after an existing continuous oil pipe is lowered into a horizontal section, centralizing cannot be achieved, and bending and damage are likely to happen are mainly solved. The sectioning type slips centralizing protector is characterized in that an upper extrusion ring (2) is arranged in an upper connector (1), an upper deformation ring (3) is arranged in the upper extrusion ring (2), the bottom of the upper connector (1) is in threaded connectionwith an upper fastening connector (5), the bottom of the upper fastening connector (5) is connected with a connecting connector (7), and the bottom of the connecting connector (7) is sequentially connected with a lower fastening connector (9) and a lower connector (10); and centralizing blocks (8) are welded to the exteriors of the upper connector (1), the lower connector (10) and the connectingconnector (7). By means of the sectioning type slips centralizing protector for the continuous oil pipe, it can be guaranteed that the continuous oil pipe is in a center state at the horizontal section position, it is guaranteed that the continuous oil pipe is not abraded and corroded during fracturing, and continuous oil pipe bottom seal dragging multi-cluster jet hole volume fracturing is achieved in cooperation with a fracturing pipe column.
Description
technical field [0001] The invention relates to the field of oil fields, in particular to a split type slip centralizing protector for coiled tubing. Background technique [0002] With the deepening of oilfield exploration and development, the reservoir conditions are getting worse year by year, and the fracturing ideas are constantly being adjusted. Exploration and development of horizontal wells are all developing in the direction of close-cut volume fracturing and large-scale volume fracturing. The volume fracturing of peripheral tight oil horizontal wells used to be multi-cluster staged fracturing with composite bridge plugs. The construction time efficiency is low, the construction process is cumbersome, multiple processes are required, and the construction cost is high. Therefore, the coiled tubing bottom seal drag multi-cluster perforation volumetric fracturing technology was developed. This technology reduces the construction process, improves the construction time e...
Claims
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Login to View More IPC IPC(8): E21B17/10E21B43/26
CPCE21B17/1078E21B43/26
Inventor 刘玉喜尹从萍刘岩贾岩学刘鹏孟繁志
Owner PETROCHINA CO LTD