UNPRODUCTIVE TIME ELIMINATION IS ONE OF THE REDUCING WELL CONSTRUCTION CYCLE MEANS

Byalskiy Yuri

Pshychkina Nataly

Poltava Oil and Gas College

Poltava National Yuri Kondratyuk University

Great importance in improving the balance of the calendar time of the well construction is to reduce accidents, downtime, and complications.

They are most often as a result of a malfunction of the material technical supply, violation of the technology of the construction of wells, interruptions in the supply of electricity, lack of the necessary drilling tools, and the necessary chemical reagents for the preparation of washing liquids. In order to achieve effective work, each drilling rig must plan not only the volume of drilling through the well, but also other types of work. It is very important to prepare the necessary materials and tools in advance.

For example: in the case of absorption of washing fluid during well drilling, it is necessary to have an approved list of actions to combat absorption (complications), which includes:

- Priority actions to prevent complications;

- In some way to recognize the complications;

- Technical recommendations for the elimination of complications.

Significant time when drilling a well is spent on fastening walls of a trunk by casing pipes. To save time for this kind of work, it is necessary to transfer at least 10 days to the tampon subunit to carry out a qualitative selection of the formulation of the swab solution, samples of the drilling mud (not less than 5 liters) and water of the formation (not less than 5 liters).

It is necessary to maintain a connection with the tramp unit to find out the time of cementing, in order to avoid finding a column in the wellbore more than the time required for two cycles of circulation, as well as alternation of special equipment on the drilling rig.

When creating a coherent graph of gradients reservoir pressure and hydraulic fracturing pressure, it is necessary to use the most "fresh" and reliable data, especially the hydraulic fracturing pressures. It will make it possible to simplify the design of the well.

The technological policy of the enterprise conducting the drilling operations should be aimed at combating the complications, not by means of the descent of intermediate columns, but by using the appropriate type of drilling mud and their corresponding chemical treatment. It is very important to coordinate the work of the drilling brigade with the work of repair and mechanical workshops.

It is necessary to achieve the planned implementation of preventive repair of equipment, competent and safe operation of equipment, elimination of the pressing of hydraulic cylinders of drill pumps by the piston, removal of valve sockets with electric weld.

The drill master must apply in a mechanical workshop in advance to make the necessary parts or to carry out preventive maintenance.

A large amount of unproductive time in the construction of wells accounts for the elimination of the holes in the drill column. These accidents account for approximately 70% of all types of accidents, and the time to eliminate occupants takes up to 80% of the time to eliminate these types of accidents.

To reduce the time spent on the elimination is necessary:

1. Correctly choose the type of washing liquid. It is necessary to use, if possible, solutions with low solids, treated with surfactants.

2. The density of the washing liquid should eliminate excessive excess pressure on the reservoir no more than it is established by the norms. The geological service of the enterprise must predict the formation of pressure with the highest accuracy.

3. The parameters of the washing liquid must be maintained in strict accordance with the geological and technical outfit.

4. The deviation of the density of the washing family is not more than + -0.02 g / cm3 at an actual density of 1.45 g / cm3 and more than + -0.03 G / cm3 for solutions of higher density.

5. In order to increase the anti-admirable properties, it is necessary to maintain a certain content of lubricants during the entire well cycle drilling cycle. Determine the amount of lubricant in the drilling mud followed by the crust factor (KSK), whose value should not be greater than 0,3.

6. In the enclosed solutions, it is necessary to administer noninogenic surfactants OP-7, OP-10. In order to exclude and prevent the precipitation of particles, it is necessary to add hydrolyzing reagents (PWLR, gipan, CMC) to be weighed. The introduction of suspended drilling solutions of such surfactants as SMAD, especially in conjunction with petroleum is not recommended.

7. Avoid sharp fluctuations of hydraulic pressure during descending operations.

8. It is prohibited to leave the drill column without moving in the open part of the barrel, especially when exposed to unstable layers in productive horizons, strongly porous and penetrated rocks prone to oscillations and crashes. In the case of the forced leaving of the column in the open barrel of the driller, it is prohibited to leave the lever brake lever, and it is necessary to take all steps to carry out the lifting and ensure continuous washing of the hole, if possible with the rotation of the column with the rotor or keys.

In this way, carrying out the listed measures will reduce the accident, complicate the simple process of well drilling and reduce the cycle of well construction.

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