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Vibration absorption type downhole hydraulic pulse generation device and well drilling method thereof

A generating device and hydraulic pulse technology, applied in liquid/gas jet drilling, wellbore/well components, earthwork drilling and production, etc., can solve problems affecting drilling construction efficiency, affecting downhole tool performance, drill string fracture and damage, etc. Remarkable use effect, simple principle and structure, high drilling speed

Active Publication Date: 2013-05-22
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It not only affects the construction efficiency of drilling, but also causes accidents such as fracture and damage of the drill string when it occurs frequently and violently, thereby increasing the construction cost and causing relatively large economic losses. Reduce the vibration of the drill string, especially in vertical wells. The significance of the longitudinal vibration becomes non-negligible
The existing method to reduce the vibration of the drill string is to use the shock absorber to convert the vibration energy into the elastic potential energy and internal energy of the hydraulic oil, or to release the friction energy between the springs in the shock absorber. This is not only a waste of energy, but also produces Heat also affects downhole tool performance

Method used

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  • Vibration absorption type downhole hydraulic pulse generation device and well drilling method thereof
  • Vibration absorption type downhole hydraulic pulse generation device and well drilling method thereof
  • Vibration absorption type downhole hydraulic pulse generation device and well drilling method thereof

Examples

Experimental program
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Effect test

specific Embodiment 1

[0020] Specific embodiment one: as Figures 1 to 3 As shown, a vibration-absorbing downhole hydraulic pulse generating device, the device includes a drill string linkage body and a drill string transfer body, wherein the drill string linkage body includes a tool upper joint 1, a mandrel 2 and a sleeve set outside the middle of the mandrel 2 The limit body 6 of the drill string transfer body includes a plunger cylinder, a drill bit 16, a spline outer cylinder 5 set on the upper part of the mandrel 2 and a tool center joint 9 connected with the spline outer cylinder 5, and the plunger cylinder outer cylinder The bottom of 14 is connected with the drill bit 16, and the top is connected with the joint 9 in the tool; the plunger head 11 is installed inside the outer cylinder 14 of the plunger cylinder, and the plunger head 11 is connected with the upper joint 1 of the tool through the mandrel 2, and the plunger head 11 There is a diversion hole in the upper part of the plunger head...

specific Embodiment 2

[0033] Specific embodiment two: a kind of method that utilizes pulse jet to drill well, and its drilling step is: utilize the longitudinal vibration of drill string and the pressure-on-bit fluctuation, produce relative motion through the drilling linkage body of pulse generating device and drill string transfer body, make The relative motion generated by the internal plunger pump periodically compresses the drilling fluid in the plunger cylinder to generate pulsed jets, and uses the generated pulsed jets to improve the stress state at the bottom of the well and the effect of rock cleaning to increase the drilling speed and achieve rapid drilling .

[0034] The process of the pulse generator generating the pulse jet is as follows: when the drill string vibrates downward, that is, when the bit pressure increases, the drill string linkage body moves downward relative to the drill string transfer body, the volume in the plunger cylinder decreases, and the elastic reset The element...

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Abstract

The invention belongs to the field of well drilling of oil and natural gas and relates to a vibration absorption type downhole hydraulic pulse generation device and a well drilling method thereof. The device comprises a drill column linkage body and a drill column transfer body. The device is capable of effectively carrying out periodic compression pressurizing on all downhole drilling fluid, achieving vibration energy transfer of a drill column and generation of pulse jets, and achieving pulse jet modulation of downhole jet flows. Besides, pulse amplitude is high, the principle and the structure are simple, and production, maintenance and application are easy. According to the well drilling method, the pulse generation device is utilized to transfer energy generated by vibration of the drill column, energy generated by vibration of the drill column is effectively utilized, generation of pulse jets is achieved, and drilling speed is high.

Description

technical field [0001] The invention belongs to the field of oil and natural gas drilling, and specifically relates to a device for absorbing the longitudinal vibration energy of a drill string during drilling to generate hydraulic pulses of downhole drilling fluid to improve the efficiency of rock breaking at the bottom of a well and increase the effect of removing debris at the bottom of a well and its drilling methods. Background technique [0002] The oil and gas drilling process can be simply described as a process in which the length of the drill string continues to increase, the drill bit continuously breaks rocks, the bottom hole jet continuously removes cuttings, and the drilling fluid in the annular space continues to carry rocks, so that the well depth continues to increase. The maximum length of the drill string is limited by its own strength and the bearing capacity of the derrick, and currently has relatively little impact on the increase in ROP; while the rock...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/18E21B21/00
Inventor 管志川刘永旺张洪宁史玉才廖华林
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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