RU2435922C1 - Device for direction drilling with circulation and soil protection in well construction - Google Patents

Abstract

FIELD: construction. ^ SUBSTANCE: device for direction drilling with circulation and soil protection in well construction comprises a development area for soil working, a casing tube with a cutting tool at the lower end and a throughput device for liquid medium throughput, a collector to receive developed drill fines. The collector is made as a hollow pipe equipped with a drain nozzle placed as capable of longitudinal displacement onto the casing tube and deepened into the development area by depth of 0.5-1.5 metre. The throughput device is a swivel connected via a master pipe to the upper part of the casing pipe, besides, on top the collector is narrowed, which does not prevent casing pipe throughput with couplings. The drain nozzle is made at the distance from the upper end and the diameter, which prevents liquid outflow via the collector's top. The cutting tool is made with the possibility to break the development area by thickness that exceeds the thickness of the casing pipe with the coupling. ^ EFFECT: provides for reliable operation, circulation of washing fluid and protection of soil against spillage of washing fluid in well construction. ^ 1 dwg

Description

The proposal relates to the drilling of wells and is intended to ensure the circulation of flushing fluid and to protect the soil from spills of flushing fluid during well construction.

The well-known "Method of protecting soil from salinization during well construction" (patent RU No. 2058473, IPC ЕВВ 21/06, publ. Bull. No. 11 of 04/20/1996), including the construction of an excavation pit for wastewater and its waterproofing, and before the construction of the excavation pit at the proposed location determines the direction of possible filtration of wastewater by identifying the direction of fall of the permeable formation, then behind the excavation pit, opposite the direction of possible filtration of wastewater, construct waterproof earth tanks for In the area of groundwater excavation and hydroprotective earth tanks, drilling observation pits are drilled in fresh water, while water-proof reservoirs are filled with fresh water and maintain its level above the level of wastewater in the earth pit, and according to the results of sampling and analysis of water samples from observation pits, salinity is monitored the soil.

The disadvantages of this method as a device are the large material and time costs of constructing a sealed pit for wastewater, watertight tanks, observation pits, sampling and analysis of samples, leading to a multiple increase in the cost of well construction.

The closest in technical essence and the achieved result is "Drilling device for drilling with flushing, a method of drilling a well in the ground and a drilling rig" (patent RU No. 22282012, IPC ЕВВ 29/00, Е21В 7/00, publ. Bull. No. 23 from 08/20/2006), including a drilling device for drilling with flushing, containing a development area for excavation and a collector for receiving developed drill fines, as well as a device whose elements provide a pumping effect on the flushing medium, with which the fluid from the area is filled The well can be converted into a stream through which the developed drilling fines can be transported to the collector, moreover, it contains a tubular body, on which are located the bottom of the drill bit, and on top of the lid with at least one flow passage for the passage of fluid, the lid and tubular the housing is surrounded by an internal cavity, a collection box for receiving drill stuff is located on the upper side of the cover, and the passage device is equipped with a valve device that allows passage through the passage through troystvo fluid flow directed into the inner space, while oppositely directed fluid flow locks the throughflow device.

The disadvantages of this device are:

- when drilling with this flushing device, soil contamination occurs due to spillage of flushing fluid in the area of the device, since the fluid is not pumped into a tank or other storage device;

- the cost of time and money for the continuous preparation of flushing fluid for drilling, since collection of flushing fluid and its subsequent use are not provided;

- time spent on periodic cleaning of the drill trifle accumulator, since there is no other way to remove drill trifle.

The technical task of the proposed device is to create reliable in operation and cheap in the manufacture and use of structures that circulate the flushing fluid and protect the soil from the spill of flushing fluid during well construction.

The technical problem is solved by a device for drilling directions with circulation and soil protection during well construction, containing a development area for soil development, a casing with a cutting tool at the bottom end and a throughput device for the passage of fluid, a collection box for receiving the developed drilling stuff.

New is that the collector is made in the form of a hollow pipe equipped with a drain pipe worn with the possibility of longitudinal movement on the casing and deepening into the development area to a depth of 0.5-1.5 meters, the bypass device is made in the form of a swivel connected through a lead pipe with the upper part of the casing pipe, and on top of the collector made narrowing that does not impede the passage of the casing with couplings, and the drain pipe is made at a distance from the upper end and the diameter, which does not allow fluid to flow through the top of the collector and, while the cutting tool is made with the possibility of destroying the development area by a thickness exceeding the wall thickness of the casing with the coupling.

The drawing shows a diagram of a device with an axial section.

A device for drilling direction 1 with circulation and soil protection during well construction (not shown in the drawing), containing a development area 2 for excavation (not shown in the drawing), a casing 3 with a cutting tool 4 at the lower end 5 and a throughput device 6 for a fluid passage (not shown in the drawing), a collection 7 for receiving the developed drilling stuff (not shown in the drawing). The collection 7 is made in the form of a hollow pipe 8, equipped with a drain pipe 9, worn with the possibility of longitudinal movement on the casing 3 and deepening into the development area 2 to a depth of 0.5-1.5 meters. The access device 6 is made in the form of a swivel 10 connected through the lead pipe 11 to the upper part of the casing 3, and on top of the collector 7 a narrowing 12 is made that does not impede the passage of the casing 3 with the couplings 13. The drain pipe 9 is made at a distance from the upper end 14 and diameter d, not allowing the outflow of fluid (not shown) through the top of the collector 7. The cutting tool 4 is configured to destroy the development area 2 by a thickness S exceeding the wall thickness of the casing 3 with the sleeve 13.

The device operates as follows.

On the development area 2, a collector 7 is installed coaxially to the lead pipe 11. Using the casing 3, the collector 7 is pressed into the development area 2 to a depth of 0.5-1.5 meters by the weight of the swivel 10, the lead pipe 11 and the casing 3. Next, screw the casing 3 with the cutting tool 4 at the lower end 5 and through the narrowing 12 of the collector 7 is lowered to the development area 2. Rotate the casing 3 with the cutting tool 4 (for example, the rotor 15) with simultaneous circulation of fluid through the swivel 10 to produce directional drilling. Thanks to the drain pipe 9, the drilling fines together with the flushing fluid are removed from the collector 7 on a vibrating screen (not shown in the drawing), where the flushing fluid is cleaned and re-fed through the swivel 10, the lead pipe 11 and the casing 3 to the development area 2. Due to the fact that the collection 7 is deepened into the development area 2 to a depth of 0.5-1.5 meters, spilling of the washing liquid beyond the development area 2 is excluded. Due to the fact that the cutting tool 4 is made of a thickness S exceeding the wall thickness of the casing 3 with the sleeve 13, it is possible repyatstvennoe capacity casing 3 with the coupling 13.

Thus, the proposed device is reliable in operation and cheap to manufacture and use and provides circulation of the flushing fluid and protecting the soil from the spill of flushing fluid during well construction.

Claims (1)

A device for drilling directions with circulation and soil protection during well construction, comprising a development area for soil development, a casing with a cutting tool at the bottom end and a flow passage for passing fluid, a collection for receiving the developed drilling fines, characterized in that the collection is made in in the form of a hollow pipe equipped with a drain pipe worn with the possibility of longitudinal movement on the casing and deepening into the development area to a depth of 0.5-1.5 m, the throughput device is made in in the form of a swivel connected through the lead pipe to the upper part of the casing, and on top of the collector a narrowing is made that does not impede the passage of the casing with couplings, and the drain pipe is made at a distance from the upper end and with a diameter that does not allow fluid to flow through the top of the collector, the tool is capable of destroying the development area by a thickness exceeding the thickness of the casing with the sleeve.

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