DD272885A1 - DEVICE FOR SEALING THE HORIZONTAL FILTER FOR THE DRILLING AND INSTALLATION PROCESS - Google Patents

Abstract

The invention "device for sealing the horizontal filter for the drilling and installation process" is used for Entwaesserung and relaxation of aquifers in the industries brown coal, stone and earth and water management. According to the invention the object is achieved in that the standpipe of the horizontal filter is sealed via a vertical bore with a liquid solidifying agent for standpipe bore and in its extension a Rohrstueck with stuffing box, Fuehrungshuelse, slide, pressure gauge and compressed air valve for sealing the wellhead with passage of Bohrgestaenges, a Check valve in the Bohrgestaenge to maintain the excess pressure in the horizontal bore during Gestaengewechsels are arranged. figure

Description

Field of application of the invention

The invention involves sealing the horizontal feeder for the drilling and paving process in a pressure regimen from the embankment in grown loose rock piles in the open pit lignite industry. Further fields of application are in the industrial sectors building industry, stones and earth as well as the water economy possible.

Characteristic of the known state of the art

According to DD-PS 217 216 a seal of a horizontal bore through a standpipe is known, which prevents collapsing dos the front part of the horizontal bore.

Another seal is made after completion of the horizontal bore after pulling the standpipe at the borehole mouth with raw clay.

This solution does not allow sealing of the horizontal bore for drilling and installation of the horizontal filter in the pressure regime. As a result, with increasing depth of the horizontal bore from the pressure gradient between the atmosphere and the water-bearing layer, which has little or no stability, constantly increasing frictional forces result.

It comes to uncontrollable entrainment of San ^? cicles. sc-.vie proper slushing of the drill string or the Filierstranges and thus for the early limitation of Bohrlocnteufe.

Object of the invention

The aim is to provide a secure seal for horizontal filters, in particular for drainage and expansion of pressurized aquifers with cost-effective energy and material savings.

Explanation of the essence of the invention

The object of the invention is to prevent the merger of the horizontal well by maintaining the necessary pressure in the drilling up to completion dos horizontal filter.

ErfindungsgsmäS is the standpipe of the horizontal filter with spacers between the inflatable rubber hose at the borehole mouth and find the standpipe bore via a vertical bore from the embankment with a liquid Verfestigungsrr.ittel provided

At outside of the standpipe bore horausragenden part of the standpipe, a pipe socket with flanged drain valve is arranged on the underside

In the extension of the utand pipe, a pipe section is mounted as a wellhead lock with gland, guide sleeve, slide, pressure gauge and Druckluftvsntil. The drill pipe is equipped with a check valve.

The sealed with liquid hardening medium standpipe allows the prevention of uncontrolled pressure losses in the mountains and the inclusion of the filter string with Bohrpiloten and Vollwandrohrteil before beginning drilling the taut aquifer, which allows the passage of the Bohrgestänge »to Mitnohmerteil the Bohrpiloten.

The flanged on the standpipe piece of pipe as Bohrlochkopfsicherung seals by stuffing box u. J Guide with the slide open, the drill pipe in the borehole process.

The discharge slide occurs for the metered discharge of cuttings / water · and air mixture while maintaining the necessary pressure in function. With necessary withdrawal of the drill string, e.g. defective check valve, allows the slide in the standpipe in Druckluftzutührung dio maintenance of the pressure in the horizontal bore. The check valve in the drill string prevents pressure loss during Bohrgestängewechsol.

embodiment

The invention will be explained in more detail with reference to an embodiment and an accompanying drawing:

The drawing shows a sealed standpipe 3 of the horizontal filter with a piece of pipe as Bohrlochkopfsicherung 13, drain valve 9, built-filter strand 4, Bohrpiloten with driver 10 and drill pipe 17. In a stable layer until just before the tense aquifer, the standpipe hole 1 to «recording of with Spacers 2 provided standpipe 3 made.

The rubber tube 4 inflatable at the borehole mouth forms the end of the space filled with a liquid solidifying agent 7 between the standpipe bore 1 and the standpipe 3, which is introduced from the embankment 6 via a vertical bore 5. The spacers 2 allow the uniform distribution of the liquid solidifying agent. 7

After installation of the sealed standpipe 3 9 is arranged for the metered discharge of cuttings / water and air mixture to the pipe socket 8 at its bottom of the discharge. In the standpipe is built using the entire length of the Bougeüot with entrainment device 10, Filterutrang 11 and solid wall tube 12.

Subsequently, in the further extension of the standpipe 3, a piece of pipe is flanged as a wellhead 13 and with stuffing box 14, guide sleeve 15 and slide 16 for the passage of the drill string 17, pressure gauge M and compressed air valve 19th

After introduction of the provided with a check valve 20 drill pipe 17 through the gland 14, open slide 16 to the non-positive connection of the Bohrpiloten with entrainment device 10, the necessary pressure in the standpipe 3 is made and the rotary drilling process with clear water flushing begins in the pressure regime until the completion of the horizontal filter.

Claims (1)

Sealing of the horizontal filter for the drilling and installation process in a pressure regime, characterized in that the standpipe (3) of the horizontal filter with spacers (2) between the inflatable rubber hose (4) at the borehole mouth and the end of the standpipe bore via a vertical bore with a liquid Solidifying means (7) is sealed, in extension of the standpipe (3) a piece of pipe with stuffing box (14), guide sleeve (15) and slide (16) for the passage of the drill string (17), a Dmckmanometer (18) and compressed air valve (19) is attached, wherein on the underside of the standpipe (3) a pipe socket (8) with discharge slide (9) and in the drill string (17) a check valve (20) are arranged. For this 1 page drawing