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Movable compensating drill unit

A compensation type, drill bit technology, applied in the direction of drill bit, drill pipe, drill pipe, etc., can solve the problems of reducing the time for tripping and tripping the pipe string, taking a lot of time, wasting manpower, material and financial resources, etc., so as to reduce drilling costs and operations. Cost and effect of reducing working time

Active Publication Date: 2021-01-26
SHENGLI OIL FIELD SHENGHUI OIL TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual production, oil wells are generally hundreds of meters to several thousand meters deep, or even tens of thousands of meters deep. In this process, although the PDC drill bit is wear-resistant and durable, there is still a problem of repeated tripping and unloading of the drill pipe due to the wear of the drill bit. The problem is that at a depth of thousands of meters or even tens of thousands of meters, it takes a lot of time to trip the drill pipe back and forth to replace the drill bit, which reduces the effective drilling time. Most of the time is spent on tripping the drill pipe string, and running it down Drill pipe string, in fact, the time to replace the drill bit is very short, which will waste a lot of manpower, material resources and financial resources
[0003] At present, most of the innovations are used in the improvement of the drill bit, which increases the service life of the drill bit, but no one thinks about how to reduce the time of tripping the pipe string, so as to greatly shorten the time for replacing the drill bit

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0031] Embodiment 1, with reference to attached Figure 1-7 , a kind of movable compensating drill bit device mentioned in the present invention, taking as an example a group of main drill bit devices and a group of spare drill bit devices, its technical solution is: including drill rod advancing body 1, drilling tool carrier 2, center Consumable body 3, main drilling and milling bit 4, spare bit expansion mechanism 6, spare bit rotating shaft 7, spare bit support rod 8, force transmission torque bar 9, circulating fluid channel 10, spare drilling and milling bit 11, drill bit anti-twist sipe 12. Spare drill bit deployment groove 14, the first drill bit deployment groove 15, the first drill bit deployment shaft 16, the first support rod 17, the first drill bit deployment spring 18, the first drill bit rotating shaft 19, in the drill pipe advancing body 1 The rear end is provided with an external thread 13 for connecting the drill pipe, the drill pipe advancing body 1 is provid...

Embodiment 2

[0049] Embodiment 2, the difference between the present invention and embodiment 1 is:

[0050] The standby drill device is provided with two groups, which are assembled on the center consumption body 3 successively. In this way, after the main drill device and the first standby drill device have been scrapped due to drilling and milling failure, the second standby drill device can be used again. The structure is the same as that of the first spare drill device. The drill bit device is the same, only the length of the central consumption body 3 needs to be lengthened.

[0051] Compared with Embodiment 1, its advantage is that it reduces the time for lifting the drill pipe and lowering the drill pipe once more. If it is in a deep well above 5000 meters, it can save a week or even two weeks, which is necessary for deep well drilling. In other words, it greatly saves drilling time and improves drilling efficiency.

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Abstract

The invention relates to a movable compensating drill bit device. The technical solution is: a drilling tool carrier is provided in the central hole of the drill rod advancing body, and a circulating fluid channel is formed between the drilling tool carrier and the drilling rod advancing body; body; the central consumable body is provided with a main drill device and a spare drill device, and the inner surface of the main drilling and milling drill engages with the drill bit anti-twisting sipe provided at the end of the drill rod advancing body. The beneficial effects are: the present invention designs a plurality of spare drill bit devices and the main drill bit device to be installed at one time on the drill pipe to be lowered into the well for drilling operation, and when the main drill bit device fails, the spare drill bit device is removed to form a new drilling and milling bit, It avoids the operation of lifting the drill pipe one or more times to replace the drill bit, thereby greatly reducing the operation time and improving the efficiency of effective drilling; at the same time, it also reduces the operating cost, improves the economic benefits of drilling, and reduces the drilling cost.

Description

technical field [0001] The invention relates to a compensable drilling bit device and method, in particular to a movable compensating drill bit device. Background technique [0002] The drill bit is the main tool for breaking rock during the drilling process, and the wellbore is formed by breaking the rock with the drill bit. Whether a wellbore is formed well or not, the length of time it takes is not only related to the characteristics of the drilled formation rock and the performance of the drill bit itself, but also to the degree of matching between the drill bit and the formation. The reasonable selection of the drill bit plays an important role in increasing the drilling speed and reducing the overall cost of drilling. PDC bit is a rock-breaking tool widely used in the oil and gas exploration and development industry today, which effectively improves mechanical drilling tools and shortens the drilling cycle. However, in actual production, oil wells are generally hundr...

Claims

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Application Information

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IPC IPC(8): E21B10/62E21B10/54E21B10/43E21B10/60
CPCE21B10/00E21B19/00E21B21/00E21B21/10
Inventor 于燕张润泽
Owner SHENGLI OIL FIELD SHENGHUI OIL TECH DEV