A Coiled Tubing Drilling Auxiliary Tool
An auxiliary tool and drilling technology, which is applied in the direction of earthwork drilling, rotary drilling rig, wellbore/well components, etc., can solve the problems of poor adaptability to well diameter changes, low pressure-on-bit in coiled tubing drilling and grinding operations, and poor crawler operation. Continuous and other issues, to achieve the effect of not easy to slip, strong adaptability, and large pressing force
Inactive Publication Date: 2018-01-23
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology
[0007] Purpose of the present invention: In order to overcome the disadvantages of discontinuous work of existing crawlers and poor adaptability to well diameter changes, and at the same time solve the problem of low pressure-on-bit in coiled tubing drilling and grinding operations, a coiled tubing drilling auxiliary tool is specially provided
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[0022] The present invention is not limited by the following implementation examples, and specific implementation manners can be determined according to the technical solutions of the present invention and actual conditions. Combine below Figure 1~5 The present invention is described below. The positional relationship of up, down, left, right, etc. is based on the attached figure 1 determined by the layout direction.
[0023] A transfer case is arranged on the upper end of the central cylinder 23, and a spring seat 22 is arranged between the central cylinder 23 and the transfer case and connected with a taper buckle. Turbodrill housing 29 .
[0024] Rotating cylinder 26 is arranged in the central cylinder 23, and torsion spring 24 is arranged between rotating cylinder 26 and spring seat 22. For flow holes, three spiral grooves are arranged outside the drum 26 and are evenly distributed. A sliding sleeve 25 is installed outside the center cylinder 23, and the sliding slee...
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The invention relates to a coiled tubing drilling auxiliary tool which can convert the torque of a turbine drill into the drilling pressure and torque of a front end tool. According to the technical scheme, a rotating cylinder is arranged in a central cylinder, the rotating cylinder is driven by the turbine drill to rotate, a spiral groove is formed in the outer side of the rotating cylinder to drive a slide sleeve to axially move and wheel axles to stretch out so that wheels can be tightly pressed on a well wall or a sleeve, and the turbine drill drives the three wheels to rotate through a transfer case. The coiled tubing drilling auxiliary tool can automatically adjust the stretch-out angles of the wheel axles in a stepless mode, and is high in adaptability to well diameter change; the torque of the turbine drill can be increased through the transfer case, and then better conditions are provided for the front end drilling tool.
Description
technical field [0001] The invention relates to an auxiliary tool for coiled tubing drilling, which is specifically applied to coiled tubing operations in oil and gas wells, especially operations such as coiled tubing drilling, grinding, and well washing. Background technique [0002] Coiled tubing is a complete slender pipe with a length of thousands of meters. It is coiled on the reel on land, and the whole string can be sent downhole; it is widely used in workover, drilling bridge plugs after fracturing, and falling Fish salvage, well logging, drilling and other operations. Due to its continuous structure, the coiled tubing has short tripping time, and its working efficiency is 3~5 times that of ordinary drill pipe, tubing and casing. [0003] Coiled tubing has too much deflection, can only bear axial tension, and can hardly bear torque and axial pressure. Therefore, the operation of coiled tubing in inclined wells and horizontal wells needs to add a feeding device that...
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IPC IPC(8): E21B23/00E21B19/08
CPCE21B19/08E21B23/00
Inventor 张梁邓严刘稳邓兰何虹钢
Owner SOUTHWEST PETROLEUM UNIV