CN206830123U - A kind of HTHP packer of band elasticity deblocking ratchet and balance bypass - Google Patents

Abstract

The utility model belongs to oil gas field equipment technical field, the HTHP packer of specifically a kind of band elasticity deblocking ratchet and balance bypass, its center pipe outer wall is provided with one section of pressure balance groove, pressure balance groove is separated out the deblocking stroke groove that one section of confession splits ring slip at least provided with bulge loop at one in the pressure balance groove, the by-pass connection and adapter sleeve for being mutually threadedly coupled and being fixedly connected with splitting ring are arranged outside pressure balance groove, high-temp glue cartridge module, hydraulic setting mechanism and anchor mechanism are sequentially provided with adapter sleeve.Sealing ring quantity of the present utility model is few, pressure difference can be voluntarily balanced before deblocking, setting, solving sealing mechanism with uniqueness, can bear the harsh environments of pressure difference above and below 204 DEG C of temperature and 85MPa packer, suitable for the well workover and completion practice of deep-well, ultradeep well, high angle hole and horizontal well.

Description

A kind of HTHP packer of band elasticity deblocking ratchet and balance bypass

Technical field

The utility model belongs to oil gas field equipment technical field, specifically a kind of band elasticity deblocking ratchet and balance bypass HTHP packer.

Background technology

Packer is widely used in hydrocarbon test, squeeze method, note as one of downhole tool important in oil exploration In the operations such as water, oil recovery, gas production, pressure break and acidifying, the quality of its service behaviour directly affects production cost and the warp of enterprise Ji benefit.

As people go deep into demand to oil exploration, it has in the increasingly complexity such as rugged environment-HTHP Underground carry out drilling well, completion and workover treatment.Because tubing string is too deep in deep-well, machinery rotation sets the packer of mode not Moment of torsion progress packer can be transmitted well sets operation, the machinery rotation side of setting in the operation of high angle hole and horizontal well The packer of formula can not equally transmit tubing string moment of torsion well and carry out set packer；The hydraulic packer of normal temperature and pressure is using normal Three packing element combining structures of rule can not meet the needs of HTHP, and O-ring quantity is more causes whole packer to be missed It is more at hidden danger, lose the accidents such as envelope, leakage envelope, wrong envelope caused by packer reason in oil gas field and happen occasionally.Therefore, often The packer of normal temperature and pressure does not adapt to increasingly rugged environment.

The content of the invention

A kind of the purpose of this utility model is to overcome above-mentioned deficiency, there is provided height of band elasticity deblocking ratchet and balance bypass Warm high-pressure packer, sealing ring quantity is few, and pressure difference can be voluntarily balanced before deblocking, has setting, solving sealing mechanism for uniqueness, can bear The harsh environments of 204 DEG C of temperature and 85MPa packer pressure difference up and down, suitable for deep-well, ultradeep well, high angle hole and The well workover and completion practice of horizontal well.

To realize above-mentioned technical purpose, scheme provided by the utility model is：A kind of band elasticity deblocking ratchet and balance are other Logical HTHP packer, including both ends connect the central tube of top connection and lower contact respectively, and the center pipe outer wall is provided with One section of pressure balance groove, pressure balance groove is separated out one section of confession at least provided with bulge loop at one in the pressure balance groove and splits ring slip Stroke groove is unsealed, the by-pass connection and adapter sleeve for being mutually threadedly coupled and being fixedly connected with splitting ring are arranged outside pressure balance groove, even High-temp glue cartridge module, hydraulic setting mechanism and anchor mechanism are sequentially provided with female connector.

High-temp glue cartridge module includes upper lead ring, high temperature packing element and lower lead ring, upper lead ring and is threadedly coupled with by-pass connection successively.

Hydraulic setting mechanism includes ratchet mandrel, cylinder sleeve, locked component and shear sleeve, the head end of ratchet mandrel and lower lead ring Contact, tail end are threadedly coupled with shear sleeve；Locked component includes the lock ring seat of built-in lock ring, and lock ring is with lock ring seat by lock ring tightening Sell and fix, there is unidirectional zigzag screw thread directed downwardly in the interior outside of lock ring, has what is be adapted with lock ring outside on the inside of lock ring seat Unidirectionally zigzag screw thread upward, the unidirectional zigzag screw thread upward that ratchet mandrel outside has and lock ring inner side is adapted； Cylinder sleeve is sheathed on the outside of ratchet mandrel, and the head end of cylinder sleeve is threadedly coupled with lower lead ring, and the head end screw thread of tail end and lock ring seat connects Connect, the tail end of lock ring seat is connected by starting shear pin with shear sleeve.

Anchor mechanism includes ratchet set, upper cone, monolithic bi-directional slip, slip sleeve, lower cone and slip sleeve back-up ring, ratchet The head end of set is threadedly coupled with adapter sleeve, and tail end is threadedly coupled with the head end of lower cone, and upper cone and lower cone are single to arrangement Between two cones, slip sleeve is connected piece bi-directional slip by shear pin with upper cone, and slip sleeve with it by being threadedly coupled Slip sleeve back-up ring be connected with lower cone, the tail end of lower cone is connected by unsealing shear pin with central tube, monolithic bi-directional slip It is interior to be provided with back-moving spring.

Moreover, the ring of splitting is that the C-shaped ring for being split into two points of valves by a closed ring barrel saw is formed.

Moreover, the chamfering split ring and 15 ° are respectively equipped with unsealing the both ends that contact of stroke groove, the both ends of stroke groove are unsealed Provided with chamfering adaptable therewith.

Moreover, being the rubber of AFLAS materials in the middle part of the high temperature packing element, both ends are the super heated rubber gears of AFLAS materials Circle, super heated rubber inner retainer have the cellular super-elastic metal twine of knitting forming.

Moreover, the lock ring is opened the groove of an axial direction by a monoblock type tubbiness ring milling, a c-type open loop tubbiness is formed Body.

Moreover, the central tube is located at ratchet set and the junction of lower cone is provided with deblocking release groove, the middle part of ratchet set Until the uniform long hole milling vertically of tail end, the screw thread of ratchet set tail end is the ramped shaped trapezoidal thread to sloped-end.

Moreover, the ramped shaped trapezoidal thread chamfering of the ratchet set tail end is 3 °.

Moreover, the junction of the top connection and central tube is provided with the company of No. 1 O-ring seal, by-pass connection and central tube Meet place and be provided with No. 2 O-ring seals, the junction of by-pass connection and adapter sleeve is provided with No. 3 O-ring seals, lower lead ring and adapter sleeve Junction be provided with No. 4 O-ring seals, the junction of lower lead ring and cylinder sleeve is provided with No. 5 O-ring seals, and ratchet mandrel is with being connected The junction of set is provided with No. 6 O-ring seals, and the junction of ratchet mandrel and cylinder sleeve is provided with No. 7 O-ring seals, and adapter sleeve is with The junction of heart pipe is provided with No. 8 O-ring seals, and the junction of lower contact and central tube is provided with No. 9 O-ring seals.

The beneficial effects of the utility model are：Hydraulic setting is realized without rotation or lifting；Monolithic bi-directional slip is effective Grappling, prevent packer caused by the moving up or move down of various construction stages packer unbalance stress and caused deblocking is existing As；Anti-back locking collar combination mechanism can effectively lock the setting force of high temperature combination packing element, prevent the resilience of high temperature combination packing element； The ratchet of particular design is enclosed on set after can bear tensile load, deblocking when can effectively bounce back dropout so as to unseal envelope Every device；By-pass connection mechanism can provide the balance of the pressure difference up and down of high temperature combination packing element in deblocking so that packer top The mechanism can that other balance tubing string pressure differences need not be added easily unseals, and combines high temperature packing element and high-temperature seal ring can be effective 204 DEG C of resistance underground high temperature and 85MPa pressure differences；Combination high temperature packing element is located at slips top, prevents packer by the wind of sand card Danger.It is simple in construction, it is easy to operate, HTHP is born, low is required to workover rig, is primarily adapted for use in mechanical setting type inconvenience In high angle hole or horizontal well, and it can solve the problem that conventional packer can not bear HTHP and without deblocking pressure balance machine It is configured to the difficult problem of deblocking.

Brief description of the drawings

Fig. 1 is structural representation of the present utility model.

Fig. 2 is part A enlarged drawing in Fig. 1.

Fig. 3 is part B enlarged drawing in Fig. 1.

Fig. 4 is C portion enlarged drawing in Fig. 1.

Fig. 5 is D magnified partial views in Fig. 1.

Fig. 6 is enlarged drawing at E in Fig. 3.

Fig. 7 is enlarged drawing at F in Fig. 4.

Fig. 8 is the structural representation of lock ring.

Fig. 9 is Fig. 8 axial sectional view.

Figure 10 is ratchet nested structure schematic diagram.

Figure 11 is ratchet set axial section.

Wherein, 1, top connection, 2, No. 1 O-ring seals, 3, No. 2 O-ring seals, 4, by-pass connection, 5, split ring, 6, No. 3 O Type sealing ring, 7, upper lead ring, 8, adapter sleeve, 9, high temperature packing element, 9.1, super heated rubber back-up ring, 10, lower lead ring, 11, No. 4 are O-shaped close Seal, 12, No. 5 O-ring seals, 13, cylinder sleeve, 14, No. 6 O-ring seals, 15, No. 7 O-ring seals, 16, ratchet mandrel, 17, Lock ring seat, 18, lock ring, 19, lock ring tightening pin, 20, start shear pin, 21, shear sleeve, 22, upper cone, 23, No. 8 O-shaped sealings Circle, 24, shear pin, 25, ratchet set, 26, monolithic bi-directional slip, 27, back-moving spring, 28, slip sleeve, 29, lower cone, 30, Slip sleeve back-up ring, 31, deblocking shear pin, 32, central tube, 33, lower contact, 34, No. 9 O-ring seals, 35, deblocking stroke groove, 36th, pressure balance groove, 37, deblocking release groove, 38, long hole milling, 39, ramped shaped trapezoidal thread.

Embodiment

Below in conjunction with the accompanying drawings and embodiment the utility model is described in further detail.

The present embodiment provides a kind of HTHP packer of band elasticity deblocking ratchet and balance bypass, as shown in Fig. 1 ~ 5, Connect the central tube 32 of top connection 1 and lower contact 33 respectively including both ends, the outer wall of central tube 32 is provided with one section of pressure balance Groove 36, pressure balance groove 36 is separated out the deblocking row that one section of confession splits ring slip at least provided with bulge loop at one in the pressure balance groove 36 Journey groove 35, pressure balance groove 36 are arranged the by-pass connection 4 and adapter sleeve 8 for being mutually threadedly coupled and being fixedly connected with splitting ring outside, even High-temp glue cartridge module, hydraulic setting mechanism and anchor mechanism are sequentially provided with female connector 8.

High-temp glue cartridge module includes upper lead ring 7, high temperature packing element 9 and lower lead ring 10, upper lead ring 7 and the spiral shell of by-pass connection 4 successively Line connects.

Hydraulic setting mechanism includes ratchet mandrel 16, cylinder sleeve 13, locked component and shear sleeve 21, the head end of ratchet mandrel 16 Contacted with lower lead ring 10, tail end is threadedly coupled with shear sleeve 21；As shown in fig. 6, locked component includes the lock ring of built-in lock ring 18 Seat 17, lock ring 18 is fixed with lock ring seat 17 by lock ring tightening pin 19, and there is unidirectional zigzag spiral shell directed downwardly in the interior outside of lock ring 18 Line, the inner side of lock ring seat 17 have the unidirectional zigzag screw thread upward being adapted with the outside of lock ring 18, and the outside of ratchet mandrel 16 has There is the unidirectional zigzag screw thread upward being adapted with the inner side of lock ring 18；Cylinder sleeve 13 is sheathed on the outside of ratchet mandrel 16, cylinder sleeve 13 head end is threadedly coupled with lower lead ring 10, and tail end is threadedly coupled with the head end of lock ring seat 17, and the tail end of lock ring seat 17 is by opening Dynamic shear pin 20 is connected with shear sleeve 21.

Anchor mechanism includes ratchet set 25, upper cone 22, monolithic bi-directional slip 26, slip sleeve 28, lower cone 29 and slips Back-up ring 30 is covered, the head end of ratchet set 25 is threadedly coupled with adapter sleeve 8, and tail end is threadedly coupled with the head end of lower cone 29, upper cone 22 and lower cone 29 to arrangement, for monolithic bi-directional slip 26 between two cones, slip sleeve 28 passes through shear pin 24 and epicone Body 22 is connected, and slip sleeve 28 is connected by the slip sleeve back-up ring 30 being threadedly coupled with it with lower cone 29, the tail end of lower cone 29 It is connected by unsealing shear pin 31 with central tube 32, back-moving spring 27 is provided with monolithic bi-directional slip 26.

Further, the ring 5 of splitting is that the C-shaped ring for being split into two points of valves by a closed ring barrel saw is formed.

Further, the chamfering split ring 5 and 15 ° are respectively equipped with unsealing the both ends that stroke groove 35 contacts, unseals stroke The both ends of groove 35 are provided with chamfering adaptable therewith.

Further, the middle part of the high temperature packing element 9 is the rubber of AFLAS materials, and both ends are the high temperature rubbers of AFLAS materials Glue back-up ring 9.1, when preventing that high temperature packing element 9 from compressing, corner stress tears phenomenon caused by concentrating.Super heated rubber back-up ring 9.1 Inside has the cellular super-elastic metal twine of knitting forming.

Further, the lock ring 18 is opened the groove of an axial direction by a monoblock type tubbiness ring milling, forms a c-type open loop Barrel so that lock ring has diastolic in radial direction, as shown in Figure 8 and Figure 9.

Further, as shown in fig. 7, the junction that the central tube 32 is located at ratchet set 25 and lower cone 29 is provided with deblocking Release groove 37, the middle part of ratchet set 25 is until the uniform long hole milling 38 vertically of tail end, the screw thread that ratchet covers 25 tail ends are to end The inclined ramped shaped trapezoidal thread in portion, as shown in Figure 10 and Figure 11.

Further, the chamfering of ramped shaped trapezoidal thread 39 that the ratchet covers 25 tail ends is 3 °.

Further, the junction of the top connection 1 and central tube 32 is provided with No. 1 O-ring seal 2, and by-pass connection 4 is with The junction of heart pipe 32 is provided with No. 2 O-ring seals 3, and the junction of by-pass connection 4 and adapter sleeve is provided with No. 3 O-ring seals 6, under The junction of lead ring and adapter sleeve is provided with No. 4 O-ring seals 11, and the junction of lower lead ring and cylinder sleeve 13 is provided with No. 5 O-ring seals 12, the junction of ratchet mandrel 16 and adapter sleeve 8 is provided with No. 6 O-ring seals 14, and the junction of ratchet mandrel 16 and cylinder sleeve 13 is set There are No. 7 O-ring seals 15, the junction of adapter sleeve 8 and central tube 32 is provided with No. 8 O-ring seals 23, lower contact 33 and central tube 32 junction is provided with No. 9 O-ring seals 34.

The assemble sequence of this programme is：No. 8 O-ring seals 23 are loaded on the inside of the tail end of adapter sleeve 8, the tail of adapter sleeve 8 End covers 25 ramped shaped trapezoidal threads 39 with ratchet and is connected, and the head end internal thread of lower cone 29 and ratchet are covered into 25 tail end external screw threads connects Connect, deblocking shear pin 31 is fitted into the shearing perforation on central tube 32 by lower cone 29, upper cone 22 is inserted in slip sleeve 28 Inside, back-moving spring 27 and monolithic bi-directional slip 26, the tail end internal thread of slip sleeve 28 and slip sleeve are loaded onto inside slip sleeve 28 The external screw thread of back-up ring 30 is connected by angular thread, the shear pin that shear pin 24 is loaded on upper cone 22 by slip sleeve 28 In groove, shear sleeve 21 is connected in the head end of upper cone 22, lock ring 18 is screwed in into lock ring seat 17, centering lock ring 18 by buttless thread On kerf hole and lock ring seat 17 shearing tightening pin screwed hole, lock ring tightening pin 19 is screwed in, inside and outside the head end of ratchet mandrel 16 Seal groove loads onto No. 6 O-ring seals 14 and No. 7 O-ring seals 15 respectively, and ratchet mandrel 16 is loaded from the tail end of cylinder sleeve 13, will The threads of cylinder sleeve 13 are threadedly coupled with the head end of lock ring seat 17, find the startup shear pin 20 and shear sleeve of the tail end of lock ring seat 17 Start pin hole position corresponding to 21, shear pin 20 will be started and screwed in, will be filled respectively in seal groove inside and outside the lower tail end of lead ring 10 Upper No. 4 O-ring seals 11 and No. 5 O-ring seals 12, the lower tail end external screw thread of lead ring 10 is connected with the external screw thread of cylinder sleeve 13 Come, high temperature packing element 9 and upper lead ring 7 are inserted in from head end successively on adapter sleeve 8, by No. 2 O-ring seals 3 and No. 3 O-ring seals 6 It is fitted into seal groove corresponding to by-pass connection 4, the head end for splitting the Snap joint of ring 5 set 8 of valve will be divided, by the tail end of by-pass connection 4 Internal and external threads are connected with adapter sleeve 8 and upper lead ring 7 respectively, No. 1 O-ring seal 2 will be loaded in the tail end interior sealing groove of top connection 1, Its right-hand member internal thread is threadedly coupled with the head end of central tube 32, No. 9 O-ring seals will be loaded in the seal groove of lower contact 33 34, its left end internal thread and the tail end external screw thread of central tube 32 are connected, complete assembling.

The operation principle of this programme is as follows.

When setting, the lower contact of packer connects to packer is special to be suppressed blanking plug or suppress plug, top connection 1 is connected Plug is suppressed well, tubing string is placed in high temperature and pressure test well, starts to suppress from upper end, reaches that packer is specified to set pressure When, remove and suppress pipeline, suppress and set, cut and start pin 20, lower lead ring moves to left compression packing element, and ratchet mandrel moves to right, and cuts Pin 24, upper centrum promote slips, and slips anchoring is in internal surface of sleeve pipe, and lower lead ring 10 promotes and compresses high temperature packing element 9 during this, Piston force is acted on by-pass connection 4 and adapter sleeve 8 simultaneously, and adapter sleeve 8 most acts on lower cone 29 by ratchet set 25 at last On, lower cone 29 is acted on power on monolithic bi-directional slip 26 by inclined-plane, is finally anchored on the inside pipe wall of slip sleeve 28, simultaneously For action of hydraulic force on ratchet mandrel 16, ratchet mandrel 16 pushes down on that upper cone 22 is descending to act on monolithic bi-directional slip 26 On, and power is delivered on the inside pipe wall of slip sleeve 28 by the ratchet of monolithic bi-directional slip 26.

When testing annular space, action of hydraulic force is delivered to lock on by-pass connection 4 and high temperature packing element 9, by the power of lower cone 10 In ring seat 17, the inside buttless thread of lock ring seat 17 transmits the force to lock ring 18, and lock ring 18 transmits the force to ratchet mandrel 16, ratchet Mandrel 16 promotes upper cone 22, is ultimately applied on monolithic bi-directional slip 26, and monolithic bi-directional slip 26 is engaged on internal surface of sleeve pipe, Prevent packer from moving, so as to prevent the resilience of high temperature packing element 9, maintain the setting force of packer.

When testing lower annular space, and then hydraulic coupling is delivered to bypass and connect by the way that on high temperature packing element 9, power is delivered on lead ring 7 First 4, the adapter sleeve 8 being connected with by-pass connection 4 is transmitted the force to, by-pass connection 4 is with pawl set 25, ratchet set 25 and lower cone Piston force, is delivered on monolithic bi-directional slip 29, monolithic bi-directional slip 29 is anchored on set by 29 connections eventually through lower cone 29 On inside pipe wall, prevent packer from moving, so as to ensure that packer bears lower pressure difference.

During removing seal for packer, central tube 32 is above carried, deblocking shear pin 31 is cut, central tube 32 moves up, by central tube 32 The deblocking release groove 37 of bottom is moved on the remodeling trapezoidal thread for the specific ramp angles of band that ratchet covers 25 afterbodys, slope elasticity Screw thread is shunk, and the slope screw thread that screw thread is connected with lower cone is threaded off, and the top of central tube 32 deblocking stroke groove 35 is with respect to by-pass connection 4 Move up so that liquid can be by the gap between No. 2 sealing rings 3 and central tube pressure balance groove 36, it is achieved thereby that packing The balance of the pressure difference up and down of device, central tube 32, which drives, splits ring 5, drives by-pass connection 4, upper lead ring 7, adapter sleeve 8 up, gives The resilience axial space of high temperature packing element 9, so as to the deblocking of the packer of realization.

Described above is only preferred embodiment of the present utility model, it is noted that for the common skill of the art For art personnel, on the premise of the utility model principle is not departed from, some improvement or deformation can also be made, these improve or Deformation also should be regarded as the scope of protection of the utility model.

Claims (8)

1. the HTHP packer of a kind of band elasticity deblocking ratchet and balance bypass, including both ends connect top connection with respectively The central tube of joint, it is characterised in that：The center pipe outer wall is provided with one section of pressure balance groove, is at least set in the pressure balance groove There is bulge loop at one that pressure balance groove is separated out to the deblocking stroke groove that one section of confession splits ring slip, mutual screw thread is arranged outside pressure balance groove Connection and the by-pass connection and adapter sleeve that are fixedly connected with splitting ring, high-temp glue cartridge module, hydraulic setting are sequentially provided with adapter sleeve Mechanism and anchor mechanism；

High-temp glue cartridge module includes upper lead ring, high temperature packing element and lower lead ring, upper lead ring and is threadedly coupled with by-pass connection successively；

Hydraulic setting mechanism includes ratchet mandrel, cylinder sleeve, locked component and shear sleeve, and the head end of ratchet mandrel connects with lower lead ring Touch, tail end is threadedly coupled with shear sleeve；Locked component includes the lock ring seat of built-in lock ring, and lock ring is with lock ring seat by lock ring tightening pin Fixed, there is unidirectional zigzag screw thread directed downwardly in the interior outside of lock ring, has on the inside of lock ring seat and list adaptable on the outside of lock ring To zigzag screw thread upward, there is the unidirectional zigzag screw thread upward with being adapted on the inside of lock ring on the outside of ratchet mandrel；Cylinder The outside of ratchet mandrel is sheathed on, the head end of cylinder sleeve is threadedly coupled with lower lead ring, and tail end is threadedly coupled with the head end of lock ring seat, The tail end of lock ring seat is connected by starting shear pin with shear sleeve；

Anchor mechanism includes ratchet set, upper cone, monolithic bi-directional slip, slip sleeve, lower cone and slip sleeve back-up ring, ratchet set Head end is threadedly coupled with adapter sleeve, and tail end is threadedly coupled with the head end of lower cone, and upper cone and lower cone are to double to arrangement, monolithic To slips between two cones, slip sleeve is connected by shear pin with upper cone, and slip sleeve passes through the card that is threadedly coupled with it Watt set back-up ring be connected with lower cone, the tail end of lower cone is connected by unsealing shear pin with central tube, is set in monolithic bi-directional slip There is back-moving spring.

2. the HTHP packer of a kind of band elasticity deblocking ratchet according to claim 1 and balance bypass, its feature It is：The ring of splitting is that the C-shaped ring for being split into two points of valves by a closed ring barrel saw is formed.

3. the HTHP packer of a kind of band elasticity deblocking ratchet according to claim 1 or 2 and balance bypass, it is special Sign is：The chamfering split ring and 15 ° are respectively equipped with unsealing the both ends that contacts of stroke groove, unseal the both ends of stroke groove provided with Adaptable chamfering.

4. the HTHP packer of a kind of band elasticity deblocking ratchet according to claim 1 and balance bypass, its feature It is：It is the rubber of AFLAS materials in the middle part of the high temperature packing element, both ends are the super heated rubber back-up rings of AFLAS materials, high temperature rubber Glue inner retainer has the cellular super-elastic metal twine of knitting forming.

5. the HTHP packer of a kind of band elasticity deblocking ratchet according to claim 1 and balance bypass, its feature It is：The lock ring is opened the groove of an axial direction by a monoblock type tubbiness ring milling, forms a c-type open loop barrel.

6. the HTHP packer of a kind of band elasticity deblocking ratchet according to claim 1 and balance bypass, its feature It is：The central tube is located at ratchet set and the junction of lower cone is provided with deblocking release groove, and the middle part of ratchet set is until tail end Uniformly long hole milling vertically, the screw thread of ratchet set tail end are the ramped shaped trapezoidal thread to sloped-end.

7. the HTHP packer of a kind of band elasticity deblocking ratchet according to claim 6 and balance bypass, its feature It is：The ramped shaped trapezoidal thread chamfering of the ratchet set tail end is 3 °.

8. the HTHP packer of a kind of band elasticity deblocking ratchet according to claim 1 and balance bypass, its feature It is：The junction of the top connection and central tube is provided with No. 1 O-ring seal, and the junction of by-pass connection and central tube is provided with 2 The junction of number O-ring seal, by-pass connection and adapter sleeve is provided with No. 3 O-ring seals, and the junction of lower lead ring and adapter sleeve is set There are No. 4 O-ring seals, the junction of lower lead ring and cylinder sleeve is provided with the junction of No. 5 O-ring seals, ratchet mandrel and adapter sleeve Provided with No. 6 O-ring seals, the junction of ratchet mandrel and cylinder sleeve is provided with No. 7 O-ring seals, the connection of adapter sleeve and central tube Place is provided with No. 8 O-ring seals, and the junction of lower contact and central tube is provided with No. 9 O-ring seals.