A kind of underground is given up method and deviceTechnical field
Given up method and device the present invention relates to a kind of underground, when belonging to water injection well Operating Pressure during plugging tubing string, deliver the separation technology field between instrument and closure seal section.
Background technology
Oil field Operating Pressure is to keep certain pressure in pit shaft, in no killing well, do not bleed off pressure in the case of carried out a kind of advanced underground work technology of lower tubular column.Spillway discharge is larger during water injection well Operating Pressure, needs to contain pit shaft overflow during operation, main to use tubing string blocking technology.It can realize that optional position is blocked completely in tubing string in Operating Pressure construction using cable direct reading formula capping tools, but cable direct reading formula capping tools needs a kind of quick, reliable, structure of accurately giving up, realized after the completion of closure and deliver instrument and block the separation between seal section, and prior art is not met by this needs.
The content of the invention
The method and device it is an object of the present invention to provide a kind of underground is given up, so as to quick after the completion of closure, accurately and reliably realization delivery instrument and closure seal section separation, so as to overcome the deficiencies in the prior art.
The technical proposal of the invention is realized in this way：
The present invention a kind of underground method of giving up be, this method drives the screw rod on closure seal section axis to rotate by delivering the motor shaft in instrument, screw thread pair fit system is used between pushing block in screw rod and closure seal section, the rotation of screw rod is converted into pushing block and moved axially upward；When sliding block in pushing block promotion closure seal section is moved upwards, sliding block through connecting rod is promoted to be rotated with the pull bar that is hinged of closure seal section, expands outwardly pull bar bottom, and the grab on pull bar top is to contract, bayonet socket of the grab on pull bar top with delivering on instrument is disengaged, operation of giving up is realized.
Give up in method foregoing underground, the motor shaft and screw rod are externally provided with stage clip, before motor is not actuated, because stage clip plays the role of to push up downwards to sliding block, sliding block through connecting rod pulls the pull bar being hinged with closure seal section to rotate, make pull bar bottom to contract, the grab on pull bar top is expanded outwardly, making the grab on pull bar top can not disengage with delivering the bayonet socket clamping on instrument.
It is that the device includes delivering to the deliverys instrument at down-hole plugging and staying in closure seal section two parts at closure after giving up closure seal section according to a kind of give up underground releasing device of the invention of method composition of foregoing underground；The delivery instrument bottom, which is provided with the top of pull rod slot, pull rod slot, is provided with bayonet socket, and bayonet socket is vertically arranged with delivering the axis of instrument；Deliver and motor is provided with instrument, motor shaft stretches out from instrument bottom is delivered；The closure seal section top, which is provided with crank-guide way, crank-guide way, is provided with sliding block, and sliding block is hinged through a pair of links with a pair of symmetrically arranged pull bar bottoms, is hinged in the middle part of pull bar with closure seal section, pull bar top is provided with grab；Block below the crank-guide way of seal section is partly tubulose, pushing block is provided with pipe, pushing block is provided with chute, chute is slidably connected with the feather key in closure seal section pipe, pushing block center is provided with screwed hole, screwed hole is connected to form screw thread pair connected mode with screw flight, and pushing block top contacts connection with sliding block bottom surface；Screw tip is provided with connecting key, and connecting key and the link slot of motor shaft bottom are connected；Screw rod and motor outer shaft sleeve have stage clip.
In foregoing underground releasing device, described connecting rod one end is hinged through bearing pin with sliding block, and the connecting rod other end is hinged through bearing pin with pull bar bottom.
In foregoing underground releasing device, one end that the screw rod is connected with pushing block is provided with screw thread, and remainder is polished rod.
By adopting the above-described technical solution, the present invention is compared with prior art, the present invention completes the process of giving up using automatically controlled mode, and control is accurate, gives up quick, accurate, reliable.In addition, the present invention also has the advantages that back-off sub is simple in construction, it is easy to connect, quick with closure seal section to deliver instrument.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the outward appearance of the present invention and the cutting plane schematic diagram of subsequent view；
Fig. 3 is the internal structure schematic diagram after cutting in Fig. 2；
Fig. 4 is structural representation when giving up in Fig. 3；
Fig. 5 is the partial structural diagram for delivering instrument bottom；
Fig. 6 is to block the partial structural diagram at the top of seal section；
Fig. 7 is the structural representation of pushing block；
Fig. 8 is the structural representation of sliding block；
Fig. 9 is the schematic diagram of motor shaft bottom；
Figure 10 is the structural representation of screw rod.
Mark in figure for：1-closure seal section, 2-deliver instrument, 3-pull rod slot, 4-bayonet socket, 5-motor shaft, 6-crank-guide way, 7-sliding block, 8-connecting rod, 9-pull bar, 10-grab, 11-pushing block, 12-chute, 13-feather key, 14-screwed hole, 15-screw rod, 16-connecting key, 17-link slot, 18-stage clip, 19-bearing pin.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples, but not as any limitation of the invention.
Give up method a kind of underground of the present invention, as Figure 1-4, this method drives the screw rod 15 on the closure axis of seal section 1 to rotate by delivering the motor shaft 5 in instrument 2, screw thread pair fit system is used between pushing block 11 in screw rod 15 and closure seal section 1, the rotation of screw rod 15 is converted into pushing block 11 and moved axially upward；When sliding block 7 in the promotion closure seal section 1 of pushing block 11 is moved upwards, the through connecting rod 8 of sliding block 7 promotes the pull bar 9 being hinged with closure seal section 1 to rotate, expand outwardly the bottom of pull bar 9, the grab 10 on the top of pull bar 9 is to contract, the grab 10 on the top of pull bar 9 is disengaged with delivering the bayonet socket 4 on instrument 2, realize operation of giving up.Motor shaft 5 and screw rod 15 are externally provided with stage clip 18, before motor is not actuated, because stage clip 18 plays the role of to push up downwards to sliding block 7, the through connecting rod 8 of sliding block 7 pulls the pull bar 9 being hinged with closure seal section 1 to rotate, make the bottom of pull bar 9 to contract, the grab 10 on the top of pull bar 9 is expanded outwardly, and is made the grab 10 on the top of pull bar 9 and can not be disengaged with delivering the clamping of bayonet socket 4 on instrument 2.
A kind of underground releasing device of the invention for method composition of being given up according to above-mentioned underground, as Figure 1-4, the device include closure seal section 1 delivering to the delivery instrument 2 at down-hole plugging and stay in two parts of closure seal section 1 at closure after giving up；It is characterized in that：Delivery instrument 2 bottom is provided with pull rod slot 3（See Fig. 5）, the top of pull rod slot 3 is provided with bayonet socket 4, and the axis of bayonet socket 4 and delivery instrument 2 is vertically arranged；Deliver and motor is provided with instrument 2, motor shaft 5 stretches out from the bottom of instrument 2 is delivered；Closure seal section 1 top is provided with crank-guide way 6（See Fig. 6）, crank-guide way 6 is interior to be provided with sliding block 7, and sliding block 7 is hinged through a pair of links 8 with a pair of symmetrically arranged bottoms of pull bar 9, and the middle part of pull bar 9 is hinged with closure seal section 1, and the top of pull bar 9 is provided with grab 10；The crank-guide way for blocking seal section 1 is partly to be provided with pushing block 11 in tubulose, pipe below 6, and pushing block 11 is provided with chute 12（See Fig. 7）, chute 12 is with blocking the feather key 13 in the pipe of seal section 1（See Fig. 6）It is slidably connected, the center of pushing block 11 is provided with screwed hole 14, screwed hole 14 is threadedly coupled to form screw thread pair connected mode with screw rod 15, and the top of pushing block 11 contacts connection with the bottom surface of sliding block 7；The top of screw rod 15 is provided with connecting key 16（See Figure 10）, the link slot 17 of connecting key 16 and the bottom of motor shaft 5（See Fig. 9）Drive connection；Stage clip 18 is cased with outside screw rod 15 and motor shaft 5.The one end of connecting rod 8 is through bearing pin 19（See Fig. 8）It is hinged with sliding block 7, the other end of connecting rod 8 is hinged through bearing pin 19 with the bottom of pull bar 9.As shown in Figure 10, one end that screw rod 15 is connected with pushing block 11 is provided with screw thread, and remainder is polished rod.
Embodiment
In this example, pull bar 9, connecting rod 8, sliding block 7 are hinged by bearing pin 19, form linkage.Crank-guide way 6 is radially provided with closure seal section 1 top, crank-guide way 6 is groove.The middle part of pull bar 9 is fixed on by bearing pin 19 on the outer tube of closure seal section 1, and pull bar 9 can be rotated around bearing pin 19.Pull rod slot 3 and bayonet socket 4 are provided with the outer tube of instrument 2 is delivered, the grab 10 on the top of pull bar 9, which can be inserted into, delivers the outer tube of instrument 2, and hooked with delivering the step surface of bayonet socket 4 of the outer tube of instrument 2 radially, stage clip 18 locks mechanism, and pull bar 9, which is tensed, delivers the connection that the outer tube of instrument 2 completes delivery instrument 2 and closure seal section 1.Give up process：Rotated by motor control screw rod 15, screw rod 15 coordinates with pushing block 11 for screw thread pair, and pushing block 11 axially moves under screw thread pair gearing.Pushing block 11 promotes sliding block 7 to move, and sliding block 7 drives whole linkage to act when moving upwards, receives and is disengaged with delivering the bayonet socket 4 on the outer tube of instrument 2 in the grab 10 at the top of pull bar 9, realization is given up.