论文部分内容阅读
我队在某地区所施工的水文鑽探工程,地层具系第四紀冲积层,含有大量的流砂礫石,一般鑽孔皆是地表以下45～50米以下便是礫石和流砂,其厚度有8～10米,且是含水层中湧水量最大的一层。这給用套管护孔带来了很大的困难,其费时费工,达不到予期的效果,並損坏了大批的套管和取粉管接手(代替上打箍之用)、鑽杆及鑽杆接手。我們提出一种新的办法,並获得了成功,使生产效率提高了5～7倍,且节约了管材,降低了工人的劳动强度,现将具体方法分述如下,仅供参考。 (一)在礫石层降下套管的方法
My team in a certain area of hydrological drilling project, the strata with Quaternary alluvial layer, containing a lot of glulam sand, the general drilling are below the surface of 45 to 50 meters below the gravel and sands, the thickness of 8 ~ 10 meters, and is the highest water in the aquifer layer. This poses great difficulties for casing protection, which is time-consuming and labor-intensive, does not achieve the desired effect, and has damaged a large number of casing and powder take-overs (instead of hoop), drilling Rod and drill pipe take over. We propose a new approach, and achieved success, the production efficiency increased by 5 to 7 times, and save the pipe, reducing the labor intensity of workers, the specific methods are described below, for reference purposes only. (A) in the gravel layer casing down method