---------------------------------- 4295 **************** SANDVIK, DIAMANT BOART IN ACCORD ON JOINT VENTURE BRUSSELS, March 13 - and Belgian group <Diamant Boart SA> have completed preliminary negotiations on forming a joint venture which will combine their oil and gas drilling tools activities, Diamant Boart said in a statement. The two companies announced in January that they had signed a letter of intent to form a venture in which each would have equal stakes and which would have annual turnover of about 75 mln dlrs. In today's statement Diamant Board said "The results of the negotiations support strong synergy between the two units involved." Diamant Boart is a wholly owned subsidiary of Sibeka SA in which Societe Generale de Belgique <BELB.BR> has a 52 pct stake.