Steel wire pre-embedded integrated full-bore acid fracturing hose assembly and preparation method thereof

A steel wire pre-embedded integrated full-bore acid fracturing hose assembly, comprising:

• a hose;
• and
• a joint;
• wherein,
• the hose comprises an inner liner layer, an inner rubber layer, an inner ply layer, a steel wire layer, an outer ply layer and an outer rubber layer from inside to outside;
• and
• the joint comprises:
• an outer sleeve,
• a plurality of locking sleeves, being disposed inside the outer sleeve, and
• a protective sleeve;
• wherein,
• a first portion of the protective sleeve is disposed inside and overlapped by the outer sleeve;
• a second portion of the protective sleeve is disposed between the outer rubber layer and the steel wire layer of an end portion of the hose connecting to the joint;
• the plurality of the locking sleeves are sleeved sequentially along a radial direction of the joint outside the inner ply layer of an inserting part of the end portion of the hose inserting into the joint,
• an outer diameter of one of the plurality of the locking sleeves is greater than an outer diameter of the steel wire layer,
• a first end face of the one of the plurality of the locking sleeves abuts against a first end face of the protective sleeve,
• an outer circumferential surface of each of the plurality of the locking sleeves is provided with tooth grooves, and steel wires in the steel wire layer are embedded and locked in the tooth grooves;
• the inner liner layer of the inserting part of the end portion of the hose is disposed to abut against an inner surface of a first end portion of an interior of the outer sleeve opposite to the hose, and the plurality of the locking sleeves and the protective sleeve are connected to the interior of the joint through threading;
• the tooth grooves are arranged radially on the outer circumferential surface of each of the plurality of the locking sleeves,
• the steel wires are installed radially in the tooth grooves of each of the plurality of the locking sleeves, and winding directions of the steel wires of two layers in the tooth grooves are opposite;
• and
• each of the tooth grooves is provided with a thread arranged radially, the steel wires of the two layers in the tooth grooves are placed at roots of the tooth grooves, wherein set screws installed in the threads of the tooth grooves abut against the steel wires of the two layers placed at the roots of the tooth grooves to fix the steel wires.