Down-hole annular sucking turbine pump
A turbo pump and annulus technology, applied to pumps, pump devices, non-variable pumps, etc., can solve the problem of difficulty in reducing wellbore fluid column pressure, and achieve the effects of improving drilling efficiency, reducing costs, and increasing drilling speed
Active Publication Date: 2011-09-14
中国石油集团西部钻探工程有限公司吐哈钻井工艺研究院
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Problems solved by technology
[0003] The invention provides a downhole annulus suction turbine pump, which solves the problem that it is difficult to reduce the pressure of the wellbore fluid column in the existing underbalanced drilling
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[0014] The present invention is not limited by the following examples, and specific implementation methods can be determined according to the technical solutions of the present invention and actual conditions.
[0015] Below in conjunction with preferred embodiment and accompanying drawing, the present invention will be further described:
[0016] as attached figure 1 , 2 As shown, the downhole annular suction turbopump includes an upper joint 1, a stator 2, a lower joint 3 and a rotor 4; The lower joint 3, the outer part of the stator 2 is equipped with a rotor 4 that can rotate relative to the stator 2, the upper end of the rotor 4 is installed outside the middle part of the upper joint 1, and the lower end of the rotor 4 is installed outside the middle part of the lower joint 3; the inside of the upper joint 1 has The upper cavity 5, the lower joint 3 has a lower cavity 6 inside, the rotor cavity 7 is formed between the inner wall of the rotor 4 and the outer wall of the ...
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The invention relates to a pump for sucking drilling fluid in the wellbore annuli in the petroleum drilling, and in particular to a down-hole annular sucking turbine pump. The pump comprises an upper joint, a stator, a lower joint and a rotor, wherein the lower end of the upper joint is fixedly connected with the stator or is integrated with the stator into a whole; and the lower end of the stator is fixedly provided with the lower joint; the inner wall of the rotor is provided with at least two inner blades of the turbine, while the outer side is provided with at least two blades of the turbine pump. The down-hole annular sucking turbine pump has reasonable and compact structure, and convenient use, which propels the inner blades of the turbine to rotate the rotator around the stator through the circulating drilling fluid; and the rotor drives the turbine pump blades on the outer side of the rotor to rotate to discharge the wellbore annular fluid to reduce the pressure of the wellbore annular liquid column during the drilling operation so as to achieve the purpose of performing under-balanced drilling and increasing drilling speed. Thus, the down-hole annular sucking turbine pumphas the characteristics of dramatically reducing the use of the chemical agent in the drilling fluid, greatly improving the drilling efficiency, reducing the cost and having simple structure, energy conservation, environment protection and easy manufacturing.
Description
technical field [0001] The invention relates to a pump for sucking drilling fluid in the annulus of the wellbore in oil drilling, and is a turbo pump for sucking the annulus in the well. Background technique [0002] In recent years, due to the absolute advantages of underbalanced drilling technology compared with conventional drilling fluid drilling in protecting and discovering oil and gas layers, increasing drilling speed, and preventing lost circulation, it has developed rapidly in the world. my country also began to vigorously develop underbalanced drilling technology after 2003, and it has been applied on a large scale in 2007 and 2008. Underbalanced drilling technology is a drilling technology in which the liquid column pressure in the wellbore is lower than the pore pressure of the formation during the drilling process. Since the density of the configured drilling fluid is often greater than the equivalent density of formation pressure, especially in low-pressure fo...
Claims
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IPC IPC(8): F04D13/04
Inventor 张克明雷丽何媛媛
Owner 中国石油集团西部钻探工程有限公司吐哈钻井工艺研究院