Cseh Valentin szerk.: „70 éve alakult a MAORT” – tanulmányok egy bányavállalat történetéből (2009)

Valentin Cseh: Allied Air-strikes against MAORT's Facilities in 1944

Annex no. I. DUPLICATE Hungarian-American Oil Industries Ltd. Budafapuszta. Kerettye, 1939. I. 18. Technical description of the lowering of the Christmas-tree. The Christmas-tree is located in a concrete basement 2.5 times 2.5 m in size, constructed around the well bore. Within cost-efficiency, the depth oi the basement was specified by the circumstance whereby equipment to prevent blow-outs had to fit under the table, taking the height of the derrick frame while drilling into consideration. This circumstance needed to be taken into account every time we drilled exploratory bores of greater depth, when two larger size gate valves had to be integrated in addition to the several series of casing Hanges. This circumstance demanded increased basement depth, and a larger Christmas-tree structure as well. This solution can be found at our wells marked B1-B2-B3-B4. After well marked B-2 was drilled, a request arose, namely that we had to reduce the basement's depth by means ot building another, iron framework structure under the derrick frame, which could be used for all subsequent drilling, and would also save us the cost of building a deeper basement. This is how the less deep basements came about; the structure of the Christmas-tree extended above the basement wall. Covering up the wells for air-defence purposes caused a lot of trouble, and after lengthy- contemplation, the solution shown on drawing no. 1. appeared to be the most favourable one. A brick wall was erected to correspond with the basement's floor profile, 3-4 beams were laid on top, and the entire area of the basement was covered using 2" planks. We then shovelled earth on those, at a height of around 1 m. The brick wall's height varied according to the Christmastree's height, so that we still had enough room for manipulation. A part ventilation opening, part manhole required for mounting the bottom-hole pressure metering device was built directly above the Christmas-tree, using a 10" pipe. This solution is still used to cover our wells. We intend to make the rest of our wells splinter-proof - in case the esteemed Mining Authority grants permission - in the manner illustrated on outline no. 2. We are going to lower the basement to a depth corresponding to the structural height of the Christmas-tree. In order for us to be able to reduce basement depth as much as possible, we intend to construct the (diristmas-trees in the manner shown on drawing no. 2. The Chirstmas-tree's structural height would be reduced bv means of the subs. Thus the basement would be some 2 m deep. We would lower the oil pipe some 80 cm below surface at the basement already, and take it to the tank station even bv way of the basement ladder. The basement's top opening is going to be covered with 2" planks, and an approximately 40-50 cm thick banking would be set on top, which would offer adequate protection against shrapnel incoming from the side. In case of bottom-hole pressure metering, work could be done smoothly by removing a couple of planks above the Christmas-tree. It could be covered with turf sod for camouflaging. signed Ferenc Benedek plant manaeer Source: MOIM Arch. PS 47. d. 1.1. 1 *