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Deep drilling KLX 02. Drilling and documentation of a 1700 m deep borehole at Laxemar, Sweden

Abstract

In this report the preparation and execution of the deep core drilling KLX 02 is described. The hole was drilled with the wireline methods, NQ dimension (diameter 76 mm), to a final depth of 1700.5 m. Prior to core drilling a diameter 215 mm pilot hole was pre drilled to 200 m with controlled hammer drilling (DTH). In this hole casing and air-lift equipment was installed with the aim to support the circulation of drilling fluid. During core drilling there was a measurement of major drilling parameters and drilling fluid in and out of hole. As a fluid tracer uranine was used. Each 300 m of core drilling air-lift pump tests were performed. After completion a flow-meter log was run to finalize the project phase. It can be concluded that both the pre drilling and core drilling methods used proved to be successful. No severe technical problem occurred. However, potential risks have been pointed at in the report. The air-lift system functioned only partly and has to be modified for further use. Also the technique for monitoring of drilling parameters needs improvement as does the method for air-lift pump tests with packer. The organisation model for planning and realization functioned  More>>
Authors:
Andersson, O [1] 
  1. VBB VIAK AB, Malmoe (Sweden)
Publication Date:
Aug 01, 1994
Product Type:
Technical Report
Report Number:
SKB-TR-94-19
Reference Number:
SCA: 052002; PA: AIX-26:047918; EDB-95:076116; ERA-20:015040; NTS-96:000199; SN: 95001395685
Resource Relation:
Other Information: PBD: Aug 1994
Subject:
05 NUCLEAR FUELS; ROCK DRILLING; BOREHOLES; CUTTINGS REMOVAL; DRILLING EQUIPMENT; DRILLING FLUIDS; GEOLOGY; RADIOACTIVE WASTE DISPOSAL; UNDERGROUND DISPOSAL
OSTI ID:
50352
Research Organizations:
Swedish Nuclear Fuel and Waste Management Co., Stockholm (Sweden)
Country of Origin:
Sweden
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 0284-3757; Other: ON: DE95628830; TRN: SE9500065047918
Availability:
INIS; OSTI as DE95628830
Submitting Site:
SWDN
Size:
65 p.
Announcement Date:

Citation Formats

Andersson, O. Deep drilling KLX 02. Drilling and documentation of a 1700 m deep borehole at Laxemar, Sweden. Sweden: N. p., 1994. Web.
Andersson, O. Deep drilling KLX 02. Drilling and documentation of a 1700 m deep borehole at Laxemar, Sweden. Sweden.
Andersson, O. 1994. "Deep drilling KLX 02. Drilling and documentation of a 1700 m deep borehole at Laxemar, Sweden." Sweden.
@misc{etde_50352,
title = {Deep drilling KLX 02. Drilling and documentation of a 1700 m deep borehole at Laxemar, Sweden}
author = {Andersson, O}
abstractNote = {In this report the preparation and execution of the deep core drilling KLX 02 is described. The hole was drilled with the wireline methods, NQ dimension (diameter 76 mm), to a final depth of 1700.5 m. Prior to core drilling a diameter 215 mm pilot hole was pre drilled to 200 m with controlled hammer drilling (DTH). In this hole casing and air-lift equipment was installed with the aim to support the circulation of drilling fluid. During core drilling there was a measurement of major drilling parameters and drilling fluid in and out of hole. As a fluid tracer uranine was used. Each 300 m of core drilling air-lift pump tests were performed. After completion a flow-meter log was run to finalize the project phase. It can be concluded that both the pre drilling and core drilling methods used proved to be successful. No severe technical problem occurred. However, potential risks have been pointed at in the report. The air-lift system functioned only partly and has to be modified for further use. Also the technique for monitoring of drilling parameters needs improvement as does the method for air-lift pump tests with packer. The organisation model for planning and realization functioned satisfactory and can be recommended for similar future projects. 9 refs, numerous tabs and figs.}
place = {Sweden}
year = {1994}
month = {Aug}
}