A device and method for downhole bed clutch detection
A detection device and installation head technology, applied in surveying, earthwork drilling, wellbore/well components, etc., can solve problems such as inability to accurately judge the downhole state of the instrument, no intuitive seat layer for the instrument, clutch inspection, and affecting the efficiency of testing. , to achieve the effect of improving reliability and operability, improving test success rate, and precise indexing control
Active Publication Date: 2019-04-02
贵州航天凯山石油仪器有限公司
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Problems solved by technology
However, due to the complex environment in the well, there are scaling, dead oil, sand accumulation, etc., the instrument is not really seated on the correct layer, and the currently used instrument has no intuitive and effective method to check the seat layer and clutch, resulting in Ground operators cannot accurately judge the downhole state of the instrument, which affects the test work efficiency or leads to test failure
Method used
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Embodiment 1
[0017] Such as figure 1 As shown, the downhole seat layer clutch detection device of the present invention consists of a motor 1, an index encoder 2, a sealing ring one 3, a transmission shaft 4, a Hall device 5, a sealing ring two 6, a magnetic permeable cover 7, a magnetic steel 8, Support 9, screw rod 10, thread pair 11, spring 12, boss 13, pressure sensor 14, mounting head 15, positioning claw 16, torsion spring 17, rotating shaft 18, shell 19 etc. are formed.
[0018] Housing 19 in figure 1 Not shown in main view, only in figure 2 Shown in , its left end is connected to the screw thread on the right end of the mounting head 15 . The motor 1 is connected with the transmission shaft 4 through a coupling, a bearing structure, etc., and outputs torque externally. The transmission shaft 4 is equipped with a sealing ring 3, which cooperates with the inner hole of the installation head 15 to seal the external high pressure.
[0019] An index encoder 2 is installed on the sh...
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The invention discloses a downhole layer setting, engagement and disengagement detection device and method. Whether layer setting, engagement and disengagement of an instrument succeed or not is accurately and visually judged through changes of output signals of a Hall device, and the testing success rate is increased. Whether layer setting, engagement and disengagement succeed or not can also be judged according to whether a reversing rotary motor retracts claws and stalls or not after layer setting. Pulse is output by a transposition encoder to carry out precise transposition control over the motor and a transmission shaft, guarantees that a thread pair is released during layer setting and prevents threads from being damaged. Through a layer setting thread release engagement and disengagement mode, the requirement that a motor controls the retraction and stretching action of positioning claws and the two-way adjustment action is met, and the two actions does not interfere with each other. The Hall device is used for engagement and disengagement judgment, and the reliability and operability of the instrument are improved. The downhole layer setting, engagement and disengagement detection device and method are suitable for oil and water well testing instruments, and are especially suitable for concentric water well testing and adjusting and seal instrument examining.
Description
technical field [0001] The invention relates to a downhole bed formation clutch detection device and method, and belongs to the technical field of downhole instrument structures. Background technique [0002] The direct-reading instruments such as the measuring and adjusting instrument for the (empty) well and the water well seal inspection instrument all adopt the method of controlling the rotation of the downhole motor above the water distributor to open the positioning claw, and the lowering of the instrument depends on the positioning claw and the positioning step of the inner hole of the water distributor. Realize instrument positioning and seat layer. However, due to the complex environment in the well, there are scaling, dead oil, sand accumulation, etc., the instrument is not really seated on the correct layer, and the currently used instrument has no intuitive and effective method to check the seat layer and clutch, resulting in Operators on the ground cannot accur...
Claims
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IPC IPC(8): E21B47/00E21B47/06
CPCE21B47/00E21B47/06
Inventor 冯贵洪魏炎红
Owner 贵州航天凯山石油仪器有限公司