Downhole screw motor two-way vibration cementing tool and method
A screw motor, two-way vibration technology, used in wellbore/well components, vibration generating devices, earth-moving drilling and other directions, can solve problems such as uncontrollable vibration amplitude, and achieve the effect of improving cementing quality
Active Publication Date: 2016-09-14
BC P INC CHINA NAT PETROLEUM CORP +2
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Problems solved by technology
[0005] The invention provides a downhole screw motor two-way vibration cementing tool and method to solve the problem that the hydraulic pulse vibration cementing tool only produces axial vibration and the vibration amplitude cannot be controlled
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[0074] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the present invention will now be described with reference to the accompanying drawings.
[0075] Such as figure 1 and figure 2 As shown, the downhole screw motor bidirectional vibration cementing tool of the embodiment of the present invention includes:
[0076] The upper connector 1 is used for connection;
[0077] The ring-shaped baffle 2 is connected under the upper joint 1 and plays a role in positioning the motor assembly;
[0078] The motor assembly is connected under the baffle;
[0079] an axial throttle assembly, connected below the motor assembly;
[0080] The lower joint 11 is connected below the axial throttle valve assembly; wherein, the motor assembly and the axial throttle valve assembly are both arranged in the outer tube 20; the outer tube 20 is connected between the upper joint 1 and the lower joint 11 , the outer tube 20 is flush w...
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The invention provides a downhole screw motor two-way vibration cementing tool and method. The downhole screw motor two-way vibration cementing tool comprises an upper connector, an annular baffle, a motor assembly, an axial throttle valve assembly and a lower connector, wherein the annular baffle is connected to the position below the upper joint; the motor assembly is connected to the position below the baffle; the axial throttle valve assembly is connected to the position below the motor assembly; the lower connector is connected to the position below the axial throttle valve assembly. The invention further provides a downhole vibration cementing method, and the above-mentioned downhole screw motor two-way vibration cementing tool is adopted. According to the downhole screw motor two-way vibration cementing tool and method, two-way vibration can be generated in the downhole cementing process, the vibration level and vibration frequency are changed by regulating structure parameters, cement slurry under different work conditions can generate most efficient vibration, and thus cementing quality is effectively improved.
Description
technical field [0001] The invention relates to the field of oil and gas well engineering, in particular to a downhole screw motor bidirectional vibration cementing tool and method. Background technique [0002] During the cementing process, vibrating cement slurry is one of the effective technical means to improve the cementing quality. Existing vibration cementing tools can be divided into hydraulic pulse type, mechanical type, magnetostrictive type, piezoelectric ceramic type, audio frequency type, surface annular hydraulic or air pulse type and other vibration cementing tools according to the working principle. Type vibration cementing tools are the most widely used. [0003] The hydraulic pulse vibration cementing tool only produces axial vibration, and the vibration amplitude is uncontrollable. Turbine vibration cementing mainly produces radial vibration, and the eccentric block has a single structure and poor controllability. [0004] To sum up, the following probl...
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IPC IPC(8): E21B28/00E21B33/13
CPCE21B28/00E21B33/13
Inventor 尹宜勇王兆会曲从锋李军鹏王磊
Owner BC P INC CHINA NAT PETROLEUM CORP