Petroleum drill string shock absorber
A shock absorber and oil drilling technology, which is applied in the direction of drill pipe, drill pipe, drilling equipment, etc., can solve the problems of poor vibration damping effect of drill pipe, and achieve the effects of stable vibration isolation, buffer performance, stable rigidity and simple structure
Active Publication Date: 2021-04-02
UNIV OF SCI & TECH BEIJING
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Problems solved by technology
Solve the problem that the vibration damping effect of the drill pipe is poor in the prior art
Method used
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[0030] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.
[0031] The invention provides an oil drilling string shock absorber.
[0032] like figure 1 , figure 2 , image 3 and Figure 4 As shown, the shock absorber includes a drill collar nipple 4, a drive unit 7, an outer shell 2, a helical guide rail 8, a drill seat 1, a braided metal ring 6 and a vibration-absorbing composite beam 5, which is made of metal sheet and flexible The material gasket is bonded by adhesive; the drill collar nipple 4 is connected with the spiral guide rail 8; the spiral guide rail 8 is connected with the drill bit seat 1; the driving unit 7 can rotate on the spiral guide rail 8; Connected; the outer shell 2 and the drill collar sub-section 4 are sealed with a metal sealing ring 3, and a sealed space is formed between the drill ...
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The invention provides a petroleum drill string shock absorber, and belongs to the technical field of drilling engineering. The shock absorber comprises a drill collar short section, a driving unit, an outer shell, a spiral guide rail, a drill bit seat, a woven metal circular ring and a shock absorption combined beam. The shock absorption combined beam is formed by bonding a metal sheet and a flexible material gasket through an adhesive; the drill collar short section is connected with the spiral guide rail; the spiral guide rail is connected with the drill bit seat; the driving unit can rotate on the spiral guide rail; the outer shell is connected with the drill bit seat; the outer shell and the drill collar short section are sealed by a sealing ring, and a sealed space is formed among the drill collar short section, the outer shell and the drill bit seat; the woven metal circular ring is placed between the spiral guide rail and the drill bit seat and used for absorbing axial impact vibration; and the shock absorption combined beam is fixedly connected with the driving unit and the spiral guide rail through screws, after a drill bit is subjected to torsional vibration, a phase difference is formed between the driving short section and the spiral guide rail, and then vibration reduction and isolation of the drill bit are achieved through torsional deformation energy consumptionof the shock absorption combined beam.
Description
technical field [0001] The invention relates to the technical field of drilling engineering, in particular to an oil drill string shock absorber. Background technique [0002] During the rapid development of drilling technology in the petroleum industry, the problems of axial, radial and torsional impact vibrations caused by the rock-breaking characteristics of the drill bit are very prominent, especially when there is a hardness change in the drilling formation. Drill string vibration has great hazards, including: drill jumping phenomenon, frequent impact between the drill bit and the drilling well affects the life of the drill bit, unstable drilling pressure reduces work efficiency, damages ground equipment, and increases drilling costs. The application of a shock absorber can absorb vibration and shock loads, thereby increasing drilling speed and footage efficiency, and reducing drilling and production costs. The particularity of drilling and production conditions also p...
Claims
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Login to View More IPC IPC(8): E21B17/07
CPCE21B17/076
Inventor 刘海平吕琦申大山韩东航朱冬梅
Owner UNIV OF SCI & TECH BEIJING