Ultra-short-radius radial lateral drilling method for horizontal wells

A sidetracking horizontal well, ultra-short radius technology, applied in directional drilling, earthwork drilling, wellbore/well components, etc., can solve the problems of short drilling time, low construction cost, poor safety, etc., and reduce downhole complex situations , low drilling cost and good promotional value

Inactive Publication Date: 2015-11-18
DAQING HENGDELI PETROLEUM TECH SERVICE
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiencies of the existing radial sidetracking horizontal well method, such as irregular wellbore, small horizontal distance, high cost, and poor safety, the present invention provides an

Method used

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  • Ultra-short-radius radial lateral drilling method for horizontal wells
  • Ultra-short-radius radial lateral drilling method for horizontal wells
  • Ultra-short-radius radial lateral drilling method for horizontal wells

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the accompanying drawings:

[0026] Depend on Figure 1 to Figure 4 As shown, an ultra-short radius radial sidetracking horizontal well method includes the following steps:

[0027] (1), wellbore preparation

[0028] (1) Open the well to make the wellbore unobstructed;

[0029] (2) Measure by gyroscope to master the trajectory of the old well;

[0030] (3) Pressure test of the upper casing to understand the integrity of the casing;

[0031] (4) Check the relevant information of the old well, understand the cementing quality, and provide the pressure coefficient of the offset well;

[0032] (5) Clean the inner wall of the casing.

[0033] (2), lowering the inclined device

[0034] Use the Ф73 positive buckle drill pipe to lower the tilter to the specified well depth, use the logging truck to lower the gyroscope into the positioning joint above the tilter, and determine the angle required by t...

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Abstract

The invention relates to an ultra-short-radius radial lateral drilling method for a horizontal well. Problems that in the existing horizontal well ultra-short-radius radial lateral drilling method, boreholes are irregular, a horizontal distance is short, cost is high, and safety is poor are solved. The ultra-short-radius radial lateral drilling method for horizontal wells is characterized by comprising the following steps of (1) borehole preparation, (2) whipstock tripping-in, (3) window opening, (4) deflecting flexible drill pipe tripping-in for deflecting, (5) open hole logging, (6) horizontal drilling, and (7) well completion. After a horizontal well is drilled by the method, a radius is small, a borehole is regular, a horizontal distance is long, drilling time is short, construction cost is low, and safety is high.

Description

technical field [0001] The invention relates to the field of oil fields, in particular to an ultra-short radius radial sidetracking horizontal well method. Background technique [0002] At present, the following two methods are usually used to drill ultra-short radius horizontal wells in small wellbore: one is to use high pressure jet to break rock, which is characterized by non-rotating drilling tools, irregular wellbore, small size, inability to measure wellbore, and limited horizontal distance The second is to use downhole power drilling tools, which must be hinged screws or turbines, which are characterized by easy damage to power drilling tools, high production and maintenance costs, limited build rate, and low safety. SUMMARY OF THE INVENTION [0003] In order to overcome the shortcomings of the existing radial sidetracking horizontal well method with irregular wellbore, small horizontal distance, high cost and poor safety, the present invention provides an ultra-sho...

Claims

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Application Information

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IPC IPC(8): E21B7/04E21B29/06
Inventor 王炳坤
Owner DAQING HENGDELI PETROLEUM TECH SERVICE
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