A split type slip centralizer for coiled tubing
A split type, protector technology, applied in drill pipe, casing, wellbore/well components, etc., can solve the problems of easy bending, easy breakage, and non-centering, and achieve the effect of simple structure, easy installation and disassembly
Active Publication Date: 2021-08-13
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
Method used
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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, and 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 slips. 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 longitud...
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The utility model relates to a split type slip centralizing protector for coiled tubing. It mainly solves the problems that the existing coiled tubing is not centered, easy to bend and easy to be damaged after being lowered into the horizontal section during multi-cluster fracturing. It is characterized in that: the upper joint (1) is equipped with an upper extrusion ring (2), the upper extrusion ring (2) is equipped with an upper deformation ring (3), and the bottom of the upper joint (1) is threaded with a tightening ring. The fastening joint (5), the bottom of the upper fastening joint (5) is connected with the connecting joint (7), and the bottom of the connecting joint (7) is connected with the lower fastening joint (9) and the lower joint (10) in turn; the upper joint ( 1), the lower joint (10) and the connecting joint (7) are respectively welded with a centralizing block (8). The coiled tubing split type slip uprighting protector can ensure that the coiled tubing is in the center of the horizontal section, and that 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 Volumetric fracturing.
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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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