Provided is a drilling-free
cement injecting device for a horizontal well. Connection is carried out procedure by procedure according to the
well cementing procedures. In the well wall washing process, a lengthened two-stage parallel setting casing
pipe outer packer is connected with an inner-
pipe-free and drilling-out-free device and is further connected with a
well cementing pipe column to be lowered to the well bottom. In the
cement injecting and
well cementing processes, a first-stage opening and closing sliding sleeve rubber plug is connected with the inner-pipe-free and drilling-out-free device in a
casting mode and is connected with a packer opening and closing sliding sleeve in a colliding mode under the pumping pressure, the packer opening and closing sliding sleeve descends to open a packer
communication channel and seal the lengthened two-stage parallel setting casing pipe outer packer in an expanding mode, pressure shutting-in continues, and the packer opening and closing sliding sleeve descends to push a
cement grey injecting hole opening and closing sliding sleeve to descend to open a cement grey injecting hole and carry out cement injecting. In the well cementing, pressure shutting-in and cementing waiting processes, a second-stage displacing colliding press rubber plug is connected with the inner-pipe-free and drilling-out-free device in a
casting mode, connected with a colliding press sleeve in a colliding mode under the action of displacing liquid and connected with a colliding slip of the first-stage opening and closing sliding sleeve rubber plug. In the
drill-down and
fishing processes, a self-locking recessing
fishing socket is connected with a slip of the second-stage displacing colliding press rubber plug through a
fishing pipe column to fish out accessories in the inner-pipe-free and drilling-out-free device at a time.