A drilling device and method using supercritical carbon dioxide
A carbon dioxide, supercritical technology, applied in the direction of drilling with liquid/gas jet, can solve the problems of restricting development, low rock cleaning efficiency, affecting drilling efficiency, etc., to protect the formation environment, save costs, improve rock breaking and clearing. The effect of rock efficiency
Inactive Publication Date: 2018-06-19
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology
First, the efficiency of rock breaking and rock cleaning is not high, and the rock breaking pressure needs to be increased; second, the Joule-Thomson effect produced by supercritical carbon dioxide passing through the jet nozzle will reduce the temperature, thereby forming an "ice pack", which seriously affects the drilling efficiency. And greatly shorten the life of drilling equipment;
[0004] To sum up, the use of supercritical carbon dioxide jet technology has incomparable advantages in improving drilling efficiency, but the low efficiency of rock breaking and rock cleaning and the problem of "ice pack" restrict the further development of this technology, which needs to be solved at present The key issue
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[0020] The specific embodiments of the present invention will be described in further detail below in conjunction with the drawings and embodiments. The following examples are used to illustrate the present invention, but not to limit the scope of the present invention.
[0021] Such as Figure 1 to Figure 5 As shown, the drilling device using supercritical carbon dioxide of the present invention includes coiled tube drum 2, inner tube drilling pump 1, outer tube drilling pump 3, injection head 4, outer tube 5, inner tube 6 and drilling body 7, inner tube Both the drilling pump and the outer tube drilling pump are connected to the coiled tube drum. The top input ends of the outer tube and the inner tube are inserted into the injection head. The output end of the inner tube drilling pump passes through the injection head through the first connecting tube and then connects to the inner tube. The output end of the outer pipe drilling pump is connected with the input end of the oute...
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The present invention relates to the technical field of the device and method of oil-gas mining and drilling well jet, more particularly to a drilling rig of utilization supercritical carbon dioxide and method, which prevents 'ice bag' to produce and efficient rock-breaking, bit speed and clear rock ability is improved simultaneously, make drilling in higher efficiency, the lower utilization supercritical carbon dioxide of cost; Drilling rig includes continuous-tube roller, inner tube drilling pump, outer tube drilling pump, injection head, outer tube, inner tube and drilling well main body; Drilling well main body includes screwed union, screwed union is internally provided with outer tube cavity and inner tube cavity, the side wall of screwed union and bottom are respectively arranged with multiple backward nozzles and multiple forward direction nozzles, screwed union is internally provided with self-oscillation chamber and multiple points of chambers, in multiple points of chambers, the inside in each point of chamber is provided with disc spring group, and disc spring group is arranged on sub-chamber inner sidewall by sealing ring.
Description
Technical field [0001] The invention relates to the technical field of devices and methods for oil and gas exploitation and drilling jets, in particular to a drilling device and method using supercritical carbon dioxide. Background technique [0002] As we all know, with the rapid increase in the demand for oil and gas energy in the country's economic development and the implementation of new oil and gas energy strategies, the field of oil and gas exploration and development has continued to expand, ranging from complete installation, high pressure (or normal pressure), medium and high permeability homogeneous sandstone and other good geological conditions The oil fields in China have gradually shifted to complex fault blocks, low permeability, heavy oil reservoirs, pressure-depleted old oil fields, and unconventional oil and gas resources such as shale oil and gas and coalbed methane. Supercritical carbon dioxide drilling technology is a new type of drilling method that uses sup...
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IPC IPC(8): E21B7/18
CPCE21B7/18
Inventor 邓丽王国华秦大伟谭军董学成黄燊熊继有
Owner SOUTHWEST PETROLEUM UNIV