CN207063949U - A kind of one-trip string completes the instrument set with squeeze method construction of cement retainer - Google Patents

Abstract

The utility model discloses a kind of one-trip string complete cement retainer set with squeeze method construction instrument, including be sequentially connected top connection, set piston mechanism, plunger shaft unlocking mechanism, setting ball seat mechanism, ball seat unlocking mechanism, cement retainer connection and relieving mechanism, squeeze method sealing intubation mechanism.Coiled tubing, drilling rod or coiled tubing tripping in instrument can be used, cement retainer sets, given up and the all-hydraulic manipulation of squeeze method operation, workover rig without large-tonnage, it can be fulfiled assignment without ground rotation tubing string, squeeze method available for the straight well of land, desert and ocean platform, high angle hole and horizontal well is constructed, and one-trip string can complete setting, giving up and constructed with squeeze method for cement retainer.

Description

A kind of one-trip string completes the instrument set with squeeze method construction of cement retainer

Technical field

It the utility model is related to workover tool field in oil gas field underground operation tool, more particularly to a kind of one-trip string Complete the instrument set with squeeze method construction of cement retainer.

Background technology

During the formation testing of oil field development, completion, well workover usually require closure pipe water jacket string, closure nonpay zone position and Permanent type abandoned well.It is domestic at present to be for several operation solutions above：

1. utilizing packer or blank tubing squeeze method, technique is simple, but the resistance to pressure difference of squeeze packer is small, and reliability is not Height, getting up early is crossed after packer squeeze method and goes out packer, squeeze method effect is bad, rise late excessively packer then packer easily by water Slurry curing, risk are very big；Blank tubing squeeze method same bad control lift pipe string opportunity, in horizontal well or high angle hole, Cement mortar easily lies low on the horizontal half section of sleeve pipe, it is not easy to squeezes into purpose of horizon.

2. mechanical setting tool sets cement retainer squeeze method, pass through handling and rotation pipeline or drilling rod one-trip string Complete cement retainer set and squeeze method, it is convenient and reliable, but have limitation, in high angle hole and horizontal well, due to Frictional resistance between tubing string and internal surface of sleeve pipe is too big, and the machinery that can not be effectively transferred torque under several kms on ground sets work On tool, the operation of mechanical setting tool can not be realized, secondly mechanical setting tool, which must above carry very large-tonnage, can just hold cement Device is stayed to set completion, for deep-well, the own wt of tubing string itself is just very big, along with set cement retainer sets force value It is just very big, it is very high to ground lifting equipment requirement, also very high is required to the tensile load of tubing string itself.

3. conventional hydraulic setting tool sets cement squeezing tool, can be used in diameter, inclined shaft and horizontal well, reliability compared with Height, but need one-trip string complete set cement retainer after play out drilling tool, then again tripping in second plow sealing be intubated into Row cement squeeze work, the activity duration is wasted, take rig man-hour, cost is higher, and usually is rising to set tubing string first time Set during plowing squeeze method tubing string with tripping in second because down-hole slurry, sand setting or other junks can be settled and blocked Cement retainer center seal pipe inside switch squeeze method sliding sleeve in, cause second time sealing intubation can not effectively switch water Mud holds the squeeze method sliding sleeve for staying device, and can not realize the phenomenon to cement retainer bottom squeeze method.

The content of the invention

Part in order to overcome the above-mentioned deficiencies of the prior art, a kind of one-trip string completion cement of the utility model offer, which is held, to be stayed The instrument set with squeeze method construction of device, can use coiled tubing, drilling rod or coiled tubing tripping in instrument, the seat of cement retainer Seal, give up and the all-hydraulic manipulation of squeeze method operation, without the workover rig of large-tonnage, can complete to make without ground rotation tubing string Industry, the squeeze method available for the straight well of land, desert and ocean platform, high angle hole and horizontal well are constructed, one-trip string Complete setting, giving up and constructed with squeeze method for cement retainer.

To achieve the above object, the utility model adopts the following technical scheme that：A kind of one-trip string completes cement retainer Set with squeeze method construction instrument, including be sequentially connected top connection, set piston mechanism, plunger shaft unlocking mechanism, sit Blocking seat mechanism, ball seat unlocking mechanism, cement retainer connection and relieving mechanism, squeeze method sealing intubation mechanism；

Central tube, upper piston set, the piston for setting piston mechanism and including being connected with top connection, upper piston are set on Outside central tube, upper piston covers one end and is connected with top connection, the top connection of its other end and piston；

Between the centrally disposed pipe of the plunger shaft unlocking mechanism and upper piston set, including top lock tube, top lock core, on Portion's closing piece, the first shear pin, jump ring back-up ring, top lock tube are set in outside central tube, and top lock core is provided with the lock tube of top, on The perforate for accommodating top closing piece is offered on portion's lock core, central tube is externally provided with the radial direction groove milling for accommodating top lock core, top lock tube The first shear pin is provided with top lock core, is provided with the inside of the lock tube of top and accommodates the first groove milling that top lock core is upspring, jump ring gear Circle is arranged at the inner wall trench of top lock tube end；

The ball seat unlocking mechanism includes adapter sleeve, ball seat locating piece, lower latch set, lower piston set, ball seat positioning lock, The lower piston set is connected with the bottom of piston, and adapter sleeve is connected with center tube end, and lower latch is set on lower piston set Between adapter sleeve, and the second shear pin is provided between lower latch set and lower piston set, ball seat positioning lock is connected to connection Between set and ball seat, lower latch set inwall is provided with the second groove milling for accommodating ball seat positioning lock；

The setting ball seat mechanism includes ball seat and steel ball, and ball seat is arranged in adapter sleeve, and steel ball is arranged on ball seat one end Adapter sleeve in；

The cement retainer connection and relieving mechanism include insertion joint, baffle ring, the ratchet being connected with adapter sleeve end Set, elastic pawl, setting sleeve, shearing ring, setting sleeve are connected by holding screw and lower piston set, and ratchet is set on setting sleeve Inner side and it is connected with setting sleeve by the 3rd shear pin, one end of elastic pawl is connected with inserting the end of joint, the other end It is arranged in ratchet set, baffle ring is set in insertion joint bottom and is arranged in ratchet set, and ratchet set bottom is provided with screw thread, and its End is connected with the shearing ring being set in outside insertion joint；

The squeeze method sealing mechanism includes sealing ring assembly, seal ring seal circle and phase shift joint sealing ring assembly and set In insertion joint bottom outer wall, seal ring seal circle is arranged on sealing ring outer wall with inwall, inserting the bottom connection of joint There is phase shift joint.

In the above-mentioned technical solutions, be provided with the first O-ring seal between the top connection and central tube, top lock tube with it is upper The second O-ring seal is provided between piston bush, is provided with the 3rd O-ring seal between top lock core and central tube, top lock core with The 4th O-ring seal is provided between the lock tube of top, the center pipe outer wall close to top lock tube end is provided with the 5th O-shaped sealing Circle, the 6th O-ring seal is provided between upper piston set and piston, the 7th O-ring seal, center are provided between piston and central tube The 8th O-ring seal is provided between pipe and adapter sleeve, the 9th O-ring seal, ball seat are provided between adapter sleeve and lower latch set The tenth O-ring seal is provided between adapter sleeve, the 11st O-ring seal is provided between lower latch set and adapter sleeve, connects The 11st O-ring seal is provided between set and insertion joint.

In the above-mentioned technical solutions, the radial direction groove milling is the small shape of outer imperial palace, and its inclination angle size is 15 °.

In the above-mentioned technical solutions, the quantity of first groove milling is 4, and the quantity of top closing piece is 4, top closing piece it is interior Wall is provided with the arc surface coordinated with the outer wall of central tube.

In the above-mentioned technical solutions, the end that upper piston set is connected with top connection is provided with the multiple piston bush being axially distributed Groove milling, the end of upper piston set are connected by the top of screw thread and piston, and upper piston set is provided with letting out for pressure release at screw thread Press hole.

In the above-mentioned technical solutions, inwall of the upper piston set at top connection is provided with vertical direction in 15 ° Ramp angle.

In the above-mentioned technical solutions, it is in 30 ° of smooth domatic, ball that the ball seat and steel ball contact position, which are provided with horizontal direction, Seat positioning lock is provided with multiple, same amount of ball seat groove milling of the ball seat provided with receiving ball seat positioning lock, ball seat groove milling two sides It is in 60 ° of angle with horizontal direction, adapter sleeve is provided with corresponding through hole groove milling and is used to assemble ball seat positioning lock, lower latch set The cut groove for being used for the motion of the second shear pin is provided with the second shear pin junction.

In the above-mentioned technical solutions, the quantity of the ball seat groove milling and ball seat positioning lock is 4.

In the above-mentioned technical solutions, described elastic pawl one end is connected by angular thread with insertion joint, elastic pawl Circumference be provided with multiple rectangle groove millings, it is in 75 ° of slope that its other end afterbody, which is provided with horizontal direction, ratchet set bottom Screw thread is left-handed buttless thread.

In the above-mentioned technical solutions, outer wall is provided with annular groove in the middle part of the phase shift joint, and groove both sides are provided with uniform Waist type groove, stop platform provided with reducing at its inner wall of end.

In the above-mentioned technical solutions, the quantity of the sealing ring assembly is at least 2.

The beneficial effects of the utility model are：A kind of one-trip string completes setting and squeeze method construction for cement retainer Instrument, the tubing string that great number is saved for construction remove cost；The instrument for setting hydraulic-pressure bridge plug can be repacked into；Set cement retainer When full name hydraulic control, without lifting or rotating ground line post；Set give up complete cement retainer after hydraulic piston cylinder It is closed, prevents cement from entering cylinder body damage parts so that instrument can maintain use repeatedly；Can be immediately after the completion of setting Open cement retainer sliding sleeve switch and carry out cement squeeze work, prevent underground debris blocks the sliding sleeve of cement retainer from can not open Close；The mud that can be poured after giving up at the top of cement retainer or bridging plug is set, strengthens construction effect；It can be inserted with repeated multiple times Pull out the sliding sleeve for opening or closing cement retainer；Have circulation canal on instrument, when entering well without in lower tubular column toward pouring water in pipe； Low is required to ground lifting and torque apparatus, well can be entered with coiled tubing, oil pipe, drill pipe transmission, available for horizontal well, inclined shaft Constructed with the squeeze method of horizontal well.

Brief description of the drawings

Fig. 1 is the half sectional view of structural representation of the present utility model.

Fig. 2 is to set piston and the enlarged drawing of piston unlocking mechanism in Fig. 1.

Fig. 3 is the enlarged drawing of ball seat unlocking mechanism in Fig. 1.

Fig. 4 is the half sectional view that upper piston covers in Fig. 1.

Fig. 5 is the structural representation of Fig. 1 middle and upper parts closing piece.

Fig. 6 is the structural representation of ball seat positioning lock in Fig. 1.

The structural representation of phase shift joint in Fig. 7 bitmaps 1.

Wherein：1st, top connection, the 2, first O-ring seal, 3, upper piston set, 4, central tube, the 5, second O-ring seal, 6, Top lock tube, the 7, the 3rd O-ring seal, the 8, the 4th O-ring seal, 9, top lock core, 10, top closing piece, the 11, first shear pin It is fixed, 12, jump ring back-up ring, the 13, the 5th O-ring seal, the 14, the 6th O-ring seal, the 15, the 7th O-ring seal, 16, piston, 17, Lower piston set, the 18, the 8th O-ring seal, 19, adapter sleeve, 20, steel ball, the 21, the 9th O-ring seal, 22, lower latch set, 23rd, the second shear pin, 24, ball seat positioning lock, 25, ball seat, the 26, the tenth O-ring seal, the 27, the 11st O-ring seal, 28, Holding screw, the 29, the 12nd O-ring seal, 30, setting sleeve, 31, elastic pawl, 32, insertion joint, the 33, the 3rd shear pin Nail, 34, ratchet set, 35, baffle ring, 36, shearing ring, the 37, first sealing ring assembly, the 38, first seal ring seal circle, 39, second Sealing ring assembly, the 40, second sealing ring number sealing ring, 41, phase shift joint, 42. radial direction groove millings, 43. first groove millings, 44. second Groove milling, 45. piston bush groove millings, 46. grooves, 47. waist type grooves, 48. reducings stop platform.

Embodiment

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

A kind of instrument set with squeeze method construction of one-trip string completion cement retainer as shown in Figure 1, including according to The top connection 1 of secondary connection, set piston mechanism, plunger shaft unlocking mechanism, setting ball seat mechanism, ball seat unlocking mechanism, cement and hold Stay device connection and relieving mechanism, squeeze method sealing intubation mechanism；

As shown in Figure 2 and Figure 4, it is described set piston mechanism include be connected with top connection 1 central tube 4, upper piston cover 3, Piston 16, upper piston are covered outside 3 centrally disposed pipes 4, and upper piston covers 3 one end and is connected with top connection 1, its other end and piston 16 Top connects；

As shown in figure 5, between the centrally disposed pipe 4 of the plunger shaft unlocking mechanism and upper piston set 3, including top lock tube 6th, top lock core 9, top closing piece 10, the first shear pin 11, jump ring back-up ring 12, top lock tube 6 are set in outside central tube 4, on Top lock core 9 is provided with portion's lock tube 6, the perforate for accommodating top closing piece 10 is offered on top lock core 9, central tube 4 is externally provided with appearance Receive the radial direction groove milling 42 of top lock core 9, top lock tube 6 and top lock core 9 are provided with the first shear pin 11, on the inside of top lock tube 6 The first groove milling 43 upspring provided with receiving top lock core 9, jump ring back-up ring 12 are arranged at the inner wall trench of the end of top lock tube 6； The left side of jump ring back-up ring 12 contacts with the right side of top lock core 9, and setting can prevent top lock tube 6 from moving up when suppressing. Set process to complete after ball seat 25 shot down, upper piston set 3 moves down the left sides for hitting top lock tube 6, by the first shearing Pin 11 is cut, and top lock tube 6 moves down, and first groove milling 43 at the middle part of top lock tube 6 is alignd with top closing piece 10, top lock core 9 It can be moved up in the presence of hydraulic coupling, the lower-left of top closing piece 10 is along inclined-plane stress, its axial direction radially upward being subject to Component can cause top closing piece 10 to upspring radially upward, and leave the locking limitation of the radial direction groove milling 42 of central tube 4, and playback is arrived In the first groove milling 43 inside top lock tube 6, now the part such as top lock tube 6, top lock core 9 and top closing piece 10 is in hydraulic coupling In the presence of overall motion upwards, the piston bush milling for contacting until the left end of top lock tube 6 is cylindrical and promoting upper piston to cover 3 ends At groove 45.

As shown in Figure 3 and Figure 6, the ball seat unlocking mechanism includes adapter sleeve 19, ball seat locating piece 24, lower latch set 22nd, lower piston set 17, ball seat positioning lock 24, the lower piston set 17 are connected with the bottom of piston 16, adapter sleeve 19 and central tube 4 End is connected, and lower latch set 22 is arranged between lower piston set 17 and adapter sleeve 19, and lower latch set 22 and lower piston set The second shear pin 23 is provided between 17, ball seat positioning lock 24 is connected between adapter sleeve 19 and ball seat 24, lower latch set 22 Inwall is provided with the second groove milling 44 for accommodating ball seat positioning lock 24；

The setting ball seat mechanism includes ball seat 25 and steel ball 20, and ball seat 25 is arranged in adapter sleeve 19, and steel ball 20 is set In the adapter sleeve 19 of the one end of ball seat 25；The seat radial motion of positioning lock 24 relieves the locking of ball seat 25, and ball seat is shot down by hydraulic pressure In to the right-hand member of phase shift joint 41 on step, liquid can be sprayed from the waist type groove of phase shift joint 41, and now cement is held and stayed Device bottom carries out cement squeeze work, and cement job can be equally carried out down at the top of cement retainer.The structure of phase shift joint 41 Schematic diagram is as shown in Figure 7.

The cement retainer connection and relieving mechanism include insertion joint 32, the baffle ring being connected with the end of adapter sleeve 19 35th, ratchet set 34, elastic pawl 31, setting sleeve 30, shearing ring 36, setting sleeve 30 are connected by holding screw 28 and lower piston set 17 Connect, ratchet set 34 is arranged on the inner side of setting sleeve 30 and is connected with setting sleeve 30 by the 3rd shear pin 33, elastic pawl 31 One end is connected with inserting the end of joint 32, and the other end is arranged in ratchet set 34, and baffle ring 35 is set in insertion joint 32 bottom And be arranged in ratchet set 34, ratchet covers 34 bottoms and is provided with screw thread, and its end is with being set in the shearing ring inserted outside joint 32 36 connections；Pressure after the completion of setting inside hydraulic cavities being still present, upper piston set 3, lower piston set 17 are overall moved axially upward, 45 ° of chamfering slopes that lower piston is covered inside 17 right-hand members can hit lower latch set 22 and move axially upwards, when lower latch set When groove milling moves to ball seat 24 radially aligned of positioning lock in 22 middle parts, radial component of the ball seat locating piece 24 on the inclined-plane of ball seat 25 is made Under so that ball seat locating piece 24 be radially moved into lower latch set 22 middle part the second groove milling 44 in, now upper piston set 3, Piston 16, lower piston set 17 and overall axially move up of lower latch set 22 are contradicted to center until lower latch covers 22 left end steps Stop on the cylindrical step of the low order end of pipe 4, while the sealing surface of the left end inwall of piston 16 is moved at the 5th O-ring seal 13, Prevent liquid (mud or cement) from going successively to hydraulic cavities, be now effectively prevented cement mortar when carrying out cement squeeze work and pollute With the parts in solidification hydraulic pressure intracavitary portion.

It is total that the squeeze method sealing mechanism includes the first sealing ring assembly 37, the first seal ring seal circle, the second sealing ring Into the 39, second seal ring seal circle 40 and phase shift joint 41, the first sealing ring assembly 37, the second sealing ring assembly 39 are arranged on slotting Enter in the bottom outer wall of joint 32, the bottom of insertion joint 32 is connected with phase shift joint 41.First installed on insertion joint 32 is close Seal ring assembly 37, the first seal ring seal circle 38, the second sealing ring assembly 39 can be removed, and phase shift joint 41 is substituted for into screw thread Protection ring is connected with inserting the external screw thread of the afterbody of joint 32, will thus be set cement retainer squeeze method hydraulic tool and be repacked into The instrument of hydraulic bridging plug is set, equally can be after hydraulic bridging plug have been set, pour mud at the top of the bridging plug set Pulp, strengthen sealing effectiveness.

In the above-mentioned technical solutions, the first O-ring seal 2, top lock tube 6 are provided between the top connection 1 and central tube 4 The second O-ring seal 5 is provided between upper piston set 3, the 3rd O-ring seal 7 is provided between top lock core 9 and central tube 4, on The 4th O-ring seal 8 is provided between portion's lock core 9 and top lock tube 6, the outer wall of central tube 4 close to the end of top lock tube 6 is provided with 5th O-ring seal 13, the 6th O-ring seal 14 is provided between upper piston set 3 and piston 16, between piston 16 and central tube 4 Provided with the 7th O-ring seal 15, the 8th O-ring seal 18 is provided between central tube 4 and adapter sleeve 19, adapter sleeve 19 is locked with bottom The 9th O-ring seal 21 is provided between retaining ring 22, the tenth O-ring seal 16, bottom lock are provided between ball seat 25 and adapter sleeve 19 The 11st O-ring seal 17 is provided between retaining ring 22 and adapter sleeve 19, the 12nd O is provided between adapter sleeve 19 and insertion joint 32 Type sealing ring 29.

In the above-mentioned technical solutions, the small shape of described 42 outer imperial palaces of radial direction groove milling, and its inclination angle size is 15 °.

In the above-mentioned technical solutions, the quantity of first groove milling 43 is 4, and the quantity of top closing piece 10 is 4, top closing piece 10 inwall is provided with the arc surface coordinated with the outer wall of central tube 4.

In the above-mentioned technical solutions, the end that upper piston set 3 is connected with top connection 1 is provided with the multiple pistons being axially distributed Groove milling 45 is covered, is easy to well liquid during well to flow into the chamber between upper piston set 3 and central tube 4, avoids the formation of vacuum chamber and lead Cause because the static pressure difference of fluid column causes piston mechanism pre-cooling during into well, the end of upper piston set 3 passes through screw thread and piston 16 Top connection, upper piston set 3 at screw thread be provided with pressure release relief holes.

In the above-mentioned technical solutions, it is in 15 ° that the upper piston, which covers 3 inwall at top connection 1 and is provided with horizontal direction, Ramp angle upper piston set 2 set after the completion of upwards retract when, prevent and the right-hand member outer step of top connection 1 produce scratching.

In the above-mentioned technical solutions, the ball seat 25 and the contact position of steel ball 20 are provided with the smooth slope for horizontal direction being in 30 ° Face, ball seat positioning lock 24 are provided with 4, and ball seat 25 is provided with the same amount of ball seat groove milling for accommodating ball seat positioning lock 24, ball seat Groove milling two sides and the angle that horizontal direction is in 60 °, adapter sleeve 19 are provided with corresponding through hole groove milling and are used to assemble ball seat positioning Lock 24, lower latch set 22 and the junction of the second shear pin 23 are provided with the cut groove for being used for the motion of the second shear pin 23.

In the above-mentioned technical solutions, described one end of elastic pawl 31 is connected by angular thread with insertion joint 32, elasticity The circumference of ratchet 31 is provided with multiple rectangle groove millings, makes it have elasticity, and it is in 75 ° that its other end afterbody, which is provided with horizontal direction, Slope, ratchet cover 33 bottoms screw thread be left-handed buttless thread.

In the above-mentioned technical solutions, the middle part outer wall of phase shift joint 41 is provided with the annular groove 46 of groove 46 and is used for opening The bottom sliding sleeve of cement retainer is closed, the both sides of groove 46 are provided with uniform waist type groove 47, and waist type groove 47 is used for connecting ground line post With set after cement retainer bottom squeeze method passage, stop platform 48 provided with reducing at its inner wall of end, reducing stops platform 48 Effect is undertaking steel ball 20 after suppressing.

The application method of the instrument is：The shear pin 33 of holding screw 28 and the 3rd is dismantled, by the left end spiral shell of setting sleeve 30 Right-hand member screw thread to the left turn of the line along lower piston set 17 so that ratchet set 34 exposes retaining part, by cement retainer center Pipe insertion phase shift joint 41, when running into sealing ring assembly, cement retainer afterbody can be firmly tapped, when cement retainer center Inside pipe during the contact of left-hand thread screw tip, clamping ratchet set 34, and the afterbody of derotation cement retainer, until upper full screw thread, this When cement retainer squeeze method sliding sleeve be shifted by joint 41 and open, then the setting sleeve 30 that circles round is until its right side contact cement is held The left side of device top slips is stayed, the shear pin 33 of holding screw 28 and the 3rd is now installed.

Cement retainer process is set, when whole instrument is lowered into predetermined level, reacting cycle well-flushing is miscellaneous by ball seat upper end Thing or silt clean up, and put into the steel ball 20 that sets, connect ground high pressure pipe joint, start segmentation and suppress to set cement and hold Device is stayed, when shearing ring 36 is cut, cement retainer, which is set, to be finished, and setting tool departs from cement retainer, ratchet set 34 It can stay in cement retainer.

Closure piston chamber process, keeps the pressure in tubing string, and upper piston set 3 continues traveling downwardly the left end for hitting top lock tube 6 Face, the first shear pin 11 is cut, first groove milling 43 of the inside of top lock core 9 alignment top closing piece 10, top closing piece 10 is dividing Radially upspring under power effect, because unlocking mechanism right-hand member annulus area is more than the annulus area of the left end of piston 16, onesize Action of hydraulic force under, left end stress is more than right-hand member, and unlocking mechanism is moved to the left, and promote upper piston cover 3 inner end portions platform Rank, whole piston mechanism system is driven and moved to left, piston 16 is and then moved to the left, until the 5th O-ring seal 13 is by piston 16 Left end inwall covers stroke sealing, and now plunger shaft is closed, and stops feed liquor.

Ball seat is by the process of shooting down, when piston-cylinder mechanism integrally moves to left, 45 ° of slope chamferings generals of right-hand member of lower piston set 17 Lower latch set 22 is carried out to the left, and until the second groove milling 44 alignment ball seat positioning lock 24, now ball seat 25 is unlocked, and is shot down In the bottom of phase shift joint 41.

After squeeze method process, steel ball 20 and ball seat 25 are shot down, the waist type groove of the right-hand member afterbody of phase shift joint 41 is by ground line Post is connected with cement retainer squeeze method sliding sleeve, and now hydraulic chamber is closed, and tubing string is depressed on cement retainer, Phase shift joint 41 open cement retainer squeeze method sliding sleeve, now can safety carry out squeeze method operation.

Squeeze method epilog, after squeeze method, tubing string is proposed to several feet of distance, phase shift joint 41 holds cement Stay the squeeze method sliding sleeve on device to close, rinse whole tubing string, by pit shaft at unnecessary cement mortar backwash.

One-trip string is set and repacks the simple process for setting hydraulic pressure (or cable) bridging plug into squeeze method hydraulic tool, Phase shift joint 41, the first sealing ring assembly and the second sealing ring assembly are disassembled, protecting sleeve for thread is arranged on insertion joint 32 Right-hand member external screw thread on, connect and set bridging plug process and connection and operated as setting the mode of cement retainer.

It is described above, the only preferable embodiment of the utility model, but the scope of protection of the utility model is not This is confined to, any one skilled in the art can readily occur in the technical scope that the utility model discloses Change or replacement, should all cover within the scope of protection of the utility model.

Claims (11)

1. a kind of one-trip string completes the instrument set with squeeze method construction of cement retainer, it is characterized in that：Including connecting successively The top connection that connects, set piston mechanism, plunger shaft unlocking mechanism, setting ball seat mechanism, ball seat unlocking mechanism, cement retainer and connect Connect and relieving mechanism, squeeze method seal intubation mechanism；

Central tube, upper piston set, the piston for setting piston mechanism and including being connected with top connection, upper piston are set on center Pipe is outer, and upper piston covers one end and is connected with top connection, the top connection of its other end and piston；

Between the centrally disposed pipe of the plunger shaft unlocking mechanism and upper piston set, including top lock tube, top lock core, top lock Block, the first shear pin, jump ring back-up ring, top lock tube are set in outside central tube, and top lock core, top lock are provided with the lock tube of top Offered on core accommodate top closing piece perforate, central tube be externally provided with accommodate top lock core radial direction groove milling, top lock tube with it is upper Portion's lock core is provided with the first shear pin, is provided with the inside of the lock tube of top and accommodates the first groove milling that top lock core is upspring, and jump ring back-up ring is set Put at the inner wall trench of top lock tube end；

The ball seat unlocking mechanism includes adapter sleeve, ball seat locating piece, lower latch set, lower piston set, ball seat positioning lock, described Lower piston set is connected with the bottom of piston, and adapter sleeve is connected with center tube end, and lower latch is set on lower piston set and connected Between female connector, and lower latch set and lower piston cover between be provided with the second shear pin, ball seat positioning lock be connected to adapter sleeve and Between ball seat, lower latch set inwall is provided with the second groove milling for accommodating ball seat positioning lock；

The setting ball seat mechanism includes ball seat and steel ball, and ball seat is arranged in adapter sleeve, and steel ball is arranged on the company of ball seat one end In female connector；

The cement retainer connection and relieving mechanism include insertion joint, baffle ring, ratchet set, the bullet being connected with adapter sleeve end Property ratchet, setting sleeve, shearing ring, setting sleeve connected by holding screw and lower piston set, and ratchet is set on the inside of setting sleeve And be connected with setting sleeve by the 3rd shear pin, one end of elastic pawl is connected with inserting the end of joint, and the other end is set In ratchet set, baffle ring is set in insertion joint bottom and is arranged in ratchet set, and ratchet set bottom is provided with screw thread, and its end It is connected with the shearing ring being set in outside insertion joint；

The squeeze method sealing mechanism includes the first sealing ring assembly, the first seal ring seal circle, the second sealing ring assembly, second Seal ring seal circle and phase shift joint, the first sealing ring assembly, the second sealing ring assembly are arranged in insertion joint bottom outer wall, The bottom of insertion joint is connected with phase shift joint.

2. one-trip string according to claim 1 completes the instrument set with squeeze method construction of cement retainer, it is special Sign is：The first O-ring seal is provided between the top connection and central tube, the 2nd O is provided between top lock tube and upper piston set Type sealing ring, the 3rd O-ring seal is provided between top lock core and central tube, the 4th is provided between top lock core and top lock tube O-ring seal, the center pipe outer wall close to top lock tube end is provided with the 5th O-ring seal, between upper piston set and piston Provided with the 6th O-ring seal, the 7th O-ring seal is provided between piston and central tube, the is provided between central tube and adapter sleeve Eight O-ring seals, the 9th O-ring seal is provided between adapter sleeve and lower latch set, the tenth O is provided between ball seat and adapter sleeve Type sealing ring, the 11st O-ring seal is provided between lower latch set and adapter sleeve, provided with the between adapter sleeve and insertion joint 12 O-ring seals.

3. one-trip string according to claim 1 completes the instrument set with squeeze method construction of cement retainer, it is special Sign is：The small shape of imperial palace outside the radial direction groove milling position, and its inclination angle size is 15 °.

4. one-trip string according to claim 1 completes the instrument set with squeeze method construction of cement retainer, it is special Sign is：The quantity of first groove milling is 4, and the quantity of top closing piece is 4, and the inwall of top closing piece is provided with the outer wall with central tube The arc surface of cooperation.

5. one-trip string according to claim 1 completes the instrument set with squeeze method construction of cement retainer, it is special Sign is：The end that upper piston set is connected with top connection is provided with the multiple piston bush groove millings being axially distributed, the end of upper piston set Connected by the top of screw thread and piston, upper piston set is provided with the relief hole of pressure release at screw thread.

6. one-trip string completes the instrument set with squeeze method construction of cement retainer according to claim 1 or 5, its It is characterized in：Inwall of the upper piston set at top connection is provided with the ramp angle for vertical direction being in 15 °.

7. one-trip string according to claim 1 completes the instrument set with squeeze method construction of cement retainer, it is special Sign is：The ball seat and steel ball contact position are provided with smooth domatic in 30 ° with horizontal direction, and ball seat positioning lock is provided with 4, ball seat The same amount of ball seat groove milling for accommodating ball seat positioning lock, ball seat groove milling two sides and the angle that horizontal direction is in 60 ° are provided with, Adapter sleeve is provided with corresponding through hole groove milling and is used to assemble ball seat positioning lock, and lower latch set is set with the second shear pin junction There is the cut groove for the motion of the second shear pin.

8. one-trip string according to claim 1 completes the instrument set with squeeze method construction of cement retainer, it is special Sign is：The quantity of the ball seat groove milling and ball seat positioning lock is 4.

9. one-trip string according to claim 1 completes the instrument set with squeeze method construction of cement retainer, it is special Sign is：Described elastic pawl one end is connected by angular thread with insertion joint, and the circumference of elastic pawl is provided with multiple rectangular Shape groove milling, makes it have elasticity, and its other end afterbody is provided with the slope for horizontal direction being in 75 °, the screw thread of ratchet set bottom Left-handed buttless thread.

10. one-trip string according to claim 1 completes the instrument set with squeeze method construction of cement retainer, it is special Sign is：Outer wall is provided with the groove of annular in the middle part of the phase shift joint, and groove both sides are provided with uniform waist type groove, its inner wall of end Stop platform provided with reducing in place.

11. one-trip string according to claim 1 completes the instrument set with squeeze method construction of cement retainer, it is special Sign is：The quantity of the sealing ring assembly is at least 2.