FIELD: drilling means, particularly couplings and joints, namely ones arranged between rod and bit, or between rod and rod.
SUBSTANCE: connection assembly for downhole instrument connection to create instrument string comprises the first sub provided with instrument end to be attached to the first downhole instrument, and aligning end. The assembly also has mandrel with joint-pin end and opposite end. Joint-pin end may be brought in register with aligning end of the first sub. The second sub having adapting end connected to the second downhole instrument and the second end to be secured to opposite mandrel end is also provided. Bush having the first opened end and the second opened end may slide along mandrel and may be connected therewith. The second opened end is secured to leveling end of the firs sub to provide mutual connection of the first sub with the second one.
EFFECT: increased ability of instrument string connection and disconnection.
16 cl, 4 dwg
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