FIELD: oil and gas industry.
SUBSTANCE: invention relates to oil and gas industry, namely to safety devices of wellhead drives of bottom-hole sucker-rod pumps. Proposed device comprises U-shaped symmetric casing arranged with the possibility of dense symmetric installation from below on drive crossarm with tension and fixation in middle part by tie-rods. Consists of power bridges and side plates located from below, between which above the jumpers symmetrically relative to the vertical axis there are support webs made with possibility of interaction from below with the crossarm in places of least load to provide load distribution.
EFFECT: allows to strengthen structure of crossarm without disassembly and replacement, as well as to protect it against destruction at growth of loads.
1 cl, 3 dwg
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