Drilling speed increase tool capable of forming periodic drill string axial creeping and drilling pressure fluctuation

A periodic, drill string technology, applied in drilling equipment, driving devices for drilling in wellbore, earth-moving drilling, etc. speed and the effectiveness of WOB transfer, etc.

Pending Publication Date: 2020-02-11
SINOPEC SSC +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In recent years, the structure complexity of oil and gas wells in oil and gas drilling projects has gradually increased. The proportion of complex structure wells such as deep wells, ultra-deep wells, long horizontal wells, and multi-branch wells in the actual production process is increasing. The drilling depth Hard rock formations and well wall friction in deep wells due to the increase in the complexity of the wellbore structure have reduced the ROP of rock-breaking drilling and the effectiveness of WOB transmission, and the requirements for drilling methods and technology are also increasing. The traditional impact drilling speed-increasing tools such as hydraulic impactor, torsion impactor, down-the-hole hammer and other tools convert the kinetic energy of the drilling working medium into the hard impact energy of the impact hammer

Method used

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  • Drilling speed increase tool capable of forming periodic drill string axial creeping and drilling pressure fluctuation
  • Drilling speed increase tool capable of forming periodic drill string axial creeping and drilling pressure fluctuation
  • Drilling speed increase tool capable of forming periodic drill string axial creeping and drilling pressure fluctuation

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] Example 1

[0027] See figure 1 As shown, a drilling speed-increasing tool that can form periodic drill string axial creep and WOB fluctuations includes an upper joint 1, a shell 2, and a lower joint 11;

[0028] The upper joint 1 is sleeved on the upper end of the housing 2. The upper joint 1 is used to connect with the upper drill string, and the lower joint 11 is threadedly connected to the lower end of the housing 2. The cavity of the housing 2 is provided with a stepped shaft 3 and the lower joint A pressure ring 5 is connected to the upper end of the cavity of 11 in a sliding and sealing manner.

[0029] The upper end of the stepped shaft 3 is threadedly connected with the lower end of the upper joint 1, and the lower end of the stepped shaft 3 is threadedly connected to the pressure ring 5, and the upper joint 1, the step shaft 3, the pressure ring 5 and the lower joint 11 form a connected flow channel. .

[0030] A disc spring set 4 is sheathed in the middle of the out...

Example Embodiment

[0047] Example 2

[0048] This embodiment is optimized on the basis of embodiment 1, specifically:

[0049] See figure 1 As shown, the inner diameter of the upper limit step 13 of the housing 2 is smaller than the diameter of the upper end of the step shaft 3;

[0050] The inner diameter of the upper limit step 13 of the shell 2 is smaller than the diameter of the middle of the upper joint 1.

[0051] The limit step 13 restricts the stepped shaft 3 and the upper joint 1 from moving in the axial direction, on the one hand, a step fit is formed, which effectively prevents the bottom hole drill bit connected at the lower end from falling, and on the other hand, it can prevent the upper part from excessive weight on bit The disc spring group 4 is crushed, which can play a protective role.

Example Embodiment

[0052] Example 3

[0053] This embodiment is optimized on the basis of embodiment 1, specifically

[0054] See figure 1 As shown, the eccentric flow passage 15 on the impeller guide sleeve 7 is in a closed-end shape;

[0055] By designing the eccentric flow passage 15 into a closed structure, the drilling circulating medium can be gradually pressurized after flowing through the eccentric flow passage 15 of the impeller guide sleeve 7, and the pressurized drilling circulating medium has a greater impact force The impeller 9 is driven to form a stronger pulse.

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PUM

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Abstract

The invention discloses a drilling speed increase tool capable of forming periodic drill string axial creeping and drilling pressure fluctuation. The drilling speed increase tool comprises a shell, the upper end of the shell is sleeved with an upper joint, the lower end of the shell is connected with a lower joint, and a pressure bearing ring is in sliding and sealed connection with the upper endin a cavity of the lower joint; a stepped shaft is arranged in a cavity of the shell, the upper end of the stepped shaft is connected to the lower end of the upper joint, the lower end of the steppedshaft is connected to the pressure bearing ring, the periphery of the stepped shaft is sleeved with a disc spring set, and the two ends of the disc spring set abut against the outer side step face ofthe stepped shaft and the top end ring face of the lower joint; and a pulsating pressure generating component is fixedly installed in the middle of the cavity of the lower joint. The drilling speed increase tool can make a drilling circulating medium to form pulsating pressure with a certain pulsating cycle through the pulsating pressure generating component, the pulsating pressure is converted into the periodic axial creeping of the upper drill string and the periodic undulating drilling on a well bottom drill bit through the pressure bearing ring, the rock breaking drilling efficiency is improved, and the hard impact on the metal surface is fully avoided.

Description

technical field [0001] The invention relates to the technical field of petroleum equipment, in particular to a drilling speed-increasing tool capable of forming periodic drill string axial creep and pressure-on-bit fluctuations. Background technique [0002] In recent years, the structure complexity of oil and gas wells in oil and gas drilling projects has gradually increased. The proportion of complex structure wells such as deep wells, ultra-deep wells, long horizontal wells, and multi-branch wells in the actual production process is increasing. The drilling depth Hard rock formations and well wall friction in deep wells due to the increase in the complexity of the wellbore structure have reduced the ROP of rock-breaking drilling and the effectiveness of WOB transmission, and the requirements for drilling methods and technology are also increasing. The traditional impact drilling speed-increasing tools such as hydraulic impactor, torsion impactor, down-the-hole hammer and ...

Claims

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Application Information

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IPC IPC(8): E21B4/02G06F30/20
CPCE21B4/006E21B4/02
Inventor 许军富杨玉精顾洪成梁明月宿振国王磊刘松王桥马春刚杨双欣孙健张鲁王俊寒魏俊牛继磊廖华林刘东章
Owner SINOPEC SSC
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