Water retention and pressure relief device and method suitable for deep water level drilling ground stress test
A pressure relief device and ground stress technology, which is applied in the directions of surveying, earthwork drilling, and mining fluids, etc., can solve the problems of ultra-high water level drilling during the test time, long occupation, low efficiency, etc., and reduce the risk of repeated drilling up and down , saving test time and improving test efficiency
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[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0030] see figure 1 ~ Fig. 3, one embodiment of the water retention and pressure relief device suitable for deep-water level drilling in-situ stress testing according to the present invention, including a push-pull water retention and pressure relief device, an upper packer 12 and a lower packer located on the same vertical axis 15. The cent...
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