High-coverage-rate multi-arm sidewall contact device for slim hole
A pusher and coverage technology, which is applied in the field of petroleum exploration, can solve the problems of small wellbore size and can not meet the requirements, etc., and achieve the effect of improving the coverage.
Active Publication Date: 2016-06-15
CHINA NAT OFFSHORE OIL CORP +1
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Problems solved by technology
The coverage rate of the 8.5-inch borehole is 60% when the current pusher uses six arms, which is increasingly unable to meet the current geological interpretation requirements for imaging instruments; at the same time, the deeper the well is drilled, the smaller the borehole size , the pusher is also facing the imaging requirements of high temperature and high pressure slim hole
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[0033] In order to make the purpose of the invention, technical solutions and beneficial effects of the present invention more clear, the embodiments of the present invention will be described below in conjunction with the accompanying drawings. The features in can be combined arbitrarily with each other.
[0034] Such as figure 1 and figure 2 As shown, among them, figure 1 is the front view of the pusher; figure 2 for figure 1 The A-A sectional view of A-A is the sectional view of the centerline position; the slimhole high coverage dobby thruster shown in the figure is connected from top to bottom by a balance part 1, a transmission part 2, a push base 3 and a push arm 4, The top of the balance part 1 is fixedly connected to the plug with the built-in 68-pin socket 7 . Wherein, the balance part 1, the transmission part 2, and the pushing base 3 are connected and fixed by screws, and the push rod of the pushing arm 4 pushes deeply against the base 3 and is connected wit...
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The invention relates to a high-coverage-rate multi-arm sidewall contact device for a slim hole. The device is composed of a balancing part, a transmission part, a sidewall contact base body and sidewall contact arms from top to bottom in sequence, wherein the balancing part, the transmission part and the sidewall contact base body are fixedly connected in sequence, and the sidewall contact arms are coupled onto the sidewall contact base body and expand or retract under the driving of the transmission part; the multiple sidewall contact arms are arranged in two layers, and the sidewall contact arms on the upper layer and the sidewall contact arms on the lower layer are arranged in a staggered mode; furthermore, sidewall contact device wires are arranged in the way that inner wires are arranged at the center and outer wires are arranged in a bridging mode. The device solves the problems of exiting sidewall contact devices that coverage rate is low, diameter is large, and the degree of attachment to a well wall is low, and can be widely applied to slim hole exploration projects.
Description
technical field [0001] The present application relates to the technical field of petroleum exploration, in particular to a thruster in the technical field of petroleum exploration. Background technique [0002] With the improvement and deepening of oil exploration technology, high temperature, high pressure, high coverage and high definition are the development trend of thrusters. High coverage imaging can make the wellbore strata details more or even completely displayed, and the fractured and vug reservoirs The evaluation of complex lithology reservoirs such as thin beds, thin beds, and thin interbeds is of great significance. The coverage rate of the 8.5-inch borehole is 60% when the current pusher uses six arms, which is increasingly unable to meet the current geological interpretation requirements for imaging instruments; at the same time, the deeper the well is drilled, the smaller the borehole size , the thruster is also facing the imaging requirements of high temper...
Claims
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Login to View More IPC IPC(8): E21B49/00E21B47/002
CPCE21B47/002E21B49/00
Inventor 廖胜军于增辉王蕙王芝江
Owner CHINA NAT OFFSHORE OIL CORP