CN204716194U - A kind of bridging plug and releasing gadget thereof - Google Patents

A kind of bridging plug and releasing gadget thereof Download PDF

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Publication number
CN204716194U
CN204716194U CN201520395886.4U CN201520395886U CN204716194U CN 204716194 U CN204716194 U CN 204716194U CN 201520395886 U CN201520395886 U CN 201520395886U CN 204716194 U CN204716194 U CN 204716194U
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CN
China
Prior art keywords
plug
jack
ball seat
lance
giving
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201520395886.4U
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Chinese (zh)
Inventor
秦世群
张峰
张季民
杨芳
刘庆云
武萍妹
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Petroleum and Chemical Corp
Sinopec Henan Oilfield Branch Co No 1 Oil Production Plant
Original Assignee
China Petroleum and Chemical Corp
Sinopec Henan Oilfield Branch Co No 1 Oil Production Plant
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Petroleum and Chemical Corp, Sinopec Henan Oilfield Branch Co No 1 Oil Production Plant filed Critical China Petroleum and Chemical Corp
Priority to CN201520395886.4U priority Critical patent/CN204716194U/en
Application granted granted Critical
Publication of CN204716194U publication Critical patent/CN204716194U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a kind of bridging plug and releasing gadget thereof.The limited connection of ball seat of giving up of releasing gadget or be fixedly connected with or be integrally connected to fishing joint connection jack below part on, the ball seat plug at ball seat top of giving up stretches into or through connecting jack, the outer peripheral face of ball seat plug surrounds annular slot with the wall surface of the hole being connected jack, and the docking structure that can mutually be connected is set at the connection wall surface of the hole of jack and the outside wall surface of lance pawl plug, when needs are salvaged, the core lance of giving up extracted out is once turned back to annular slot again, pass through docking structure again, make to give up core lance and fishing joint is fixed together, fishing joint so just can be made upwards to be mentioned in company with core lance of giving up, realize deblocking to salvage, therefore in the utility model, the fishing difficulty of releasing gadget is lower, simple to operate, and also eliminate and to reinstall the waste that ball seat of giving up causes in core lance giving up, decrease the loss of component, reduce operating cost.

Description

A kind of bridging plug and releasing gadget thereof
Technical field
The utility model relates to a kind of bridging plug and releasing gadget thereof.
Background technology
At present, most of oil field all adopts the method for separate zone production to recover the oil, and is production control layer position, needs entering packer under oil well or bridging plug carries out separate zone production, to producing zone position and not producing zone position separate.Under when entering packer, packer and flow string are linked togather, and often occur because tubing string produces wriggling in process of production, packer being lost efficacy, again because the setting pressure on packer provides by tubing string on pump, therefore cause oil pipe bend by pressure on pump, occur pipe, bar, pump eccentric wear problem; Under when entering bridging plug, need to lose bridging plug tubing string for one time and pick up bridging plug tubing string one time, operating cost be high, to account for the product time long.
Chinese patent literature CN201092845Y discloses a kind of hydraulic pressure, double back-off hand type dragable bridge plug, comprise setting piston, fishing joint, central tube, urceolus, intervalve, packing element, to be given up core by left-handed screwed connection in the upper end of central tube, give up the top of core by dextrorotation screwed connection top connection, the simultaneously bottom of central tube and lower cone screwed connection, lower cone also with lower contact screwed connection, to give up core, central tube and lower cone are arranged on urceolus respectively, packing element, in slips support, slips is connected in the slip groove of slips support, lower cone and upper cone are connected to bottom and the top of slips support by lock ring.In use, utilize tubing string can drag for projected depth in bridging plug lower going-into-well cylinder, the steel ball throwing in corresponding size is sitting on ball seat, then suppress with pump, pressure passes to setting piston by central tube hand-hole, force its descending compressing urceolus, compressive force main frame is delivered on packing element and upper cone, such slips under the compressing of upper cone only be stuck on the tube wall surface of pit shaft, packing element Seal Oil cover annular space simultaneously, realize the effect of Seal Oil cover annular space, continue again to suppress and pin is cut off, the ball seat of giving up of in-core of giving up is descending, core lance of giving up like this shrinks and automatically disengages lower center tube and give up, if need to drag for bridging plug reclaims when pulling out from pit shaft, under in pit shaft, enter the top connection part with ball seat of giving up, after namely reloading ball seat of giving up in the core lance of giving up of taking-up part, then insert in fishing joint and carry out fishing.But in real work, by giving up, the factor such as the distortion of core lance, the distortion of pin hole affects, be difficult to again the ball seat of giving up of standard configuration be reloaded give up in core lance, this just makes the connection reliability of giving up between core lance and fishing joint not to be guaranteed, cause the phenomenon easily occurring in the salvaging process of bridging plug getting loose, increase the salvaging difficulty of bridging plug, reduce operating efficiency; Meanwhile, each is given up and the salvaging cycle will lose at least one ball seat of giving up, thus causes raw-material waste, increases operating cost.
Utility model content
The purpose of this utility model is to provide a kind of convenient releasing gadget salvaged, and the utility model additionally provides a kind of bridging plug using this salvaging mechanism simultaneously.
In order to realize above object, in the utility model, the technical scheme of releasing gadget is as follows:
Releasing gadget, comprise give up core lance and fishing joint opposing upper and lower, giving up that the bottom of core lance is provided with can the lance pawl plug that actuates of radial elastic, the top of fishing joint is provided with the connection jack inserted for lance pawl plug, be provided with in fishing joint and be connected jack with the spacing connection of lower part or be fixedly connected with or the ball seat of giving up that connects of one, the give up top of ball seat is provided with and stretches into or through connecting jack, for inserting the ball seat plug strutting lance pawl plug in lance pawl plug, outer peripheral face and the wall surface of the hole being connected jack of ball seat plug surround the annular slot inserted for lance pawl plug, and the docking structure that can mutually be connected is provided with on the connection wall surface of the hole of jack and the outside wall surface of lance pawl plug.
Docking structure is connecting thread, and the connection wall surface of the hole of jack and the outside wall surface of lance pawl plug are from the top down the intilted conical surface gradually.
In part below the spacing connection jack being connected to fishing joint of ball seat of giving up, the periphery of ball seat of giving up is convexly equipped with limiting block edge, in fishing joint, is provided with block at the limited step of limiting block along below in the part connecting below jack.
Give up ball seat be inserted in limiting block along following stapled section fishing joint in connecting in the part below jack, and be provided with all surface seal structures between the side face of the mutual inserting of give up ball seat and fishing joint.
The periphery of the bottom of fishing joint is provided with for wedging the wedge shape conical surface outwards strutting slips inside slips.
In the utility model, the technical scheme of bridging plug is as follows:
Bridging plug, comprise the anchor mechanism of releasing gadget and below connection thereof, releasing gadget comprises give up core lance and fishing joint opposing upper and lower, giving up that the bottom of core lance is provided with can the lance pawl plug that actuates of radial elastic, the top of fishing joint is provided with the connection jack inserted for lance pawl plug, be provided with in fishing joint and be connected jack with the spacing connection of lower part or be fixedly connected with or the ball seat of giving up that connects of one, the give up top of ball seat is provided with and stretches into or through connecting jack, for inserting the ball seat plug strutting lance pawl plug in lance pawl plug, outer peripheral face and the wall surface of the hole being connected jack of ball seat plug surround the annular slot inserted for lance pawl plug, and the docking structure that can mutually be connected is provided with on the connection wall surface of the hole of jack and the outside wall surface of lance pawl plug.
Docking structure is connecting thread, and the connection wall surface of the hole of jack and the outside wall surface of lance pawl plug are from the top down the intilted conical surface gradually.
In part below the spacing connection jack being connected to fishing joint of ball seat of giving up, the periphery of ball seat of giving up is convexly equipped with limiting block edge, in fishing joint, is provided with block at the limited step of limiting block along below in the part connecting below jack.
Give up ball seat be inserted in limiting block along following stapled section fishing joint in connecting in the part below jack, and be provided with all surface seal structures between the side face of the mutual inserting of give up ball seat and fishing joint.
The periphery of the bottom of fishing joint is provided with for wedging the wedge shape conical surface outwards strutting slips inside slips.
Give up in the utility model the limited connection of ball seat or be fixedly connected with or be integrally connected to fishing joint connection jack below part on, the ball seat plug at ball seat top of giving up stretches into or through connecting jack, the outer peripheral face of ball seat plug surrounds annular slot with the wall surface of the hole being connected jack, and the docking structure that can mutually be connected is set at the connection wall surface of the hole of jack and the outside wall surface of lance pawl plug, when giving up, by suppressing to pitching on ball seat of giving up, salvage plug with the ball seat compressing that makes to give up to move down, the ball seat plug at ball seat top of giving up exits from the lance pawl plug of core lance of giving up, now lance pawl plug can elasticity adduction and realize giving up, when needs are salvaged, the core lance of giving up extracted out is once turned back to annular slot again, pass through docking structure again, make to give up core lance and fishing joint is fixed together, fishing joint so just can be made upwards to be mentioned in company with core lance of giving up, realize deblocking to salvage, need in the scheme reloading ball seat of giving up in core lance of giving up compared to existing technology, in the utility model, the fishing difficulty of releasing gadget is lower, simple to operate, and also eliminate and to reinstall the waste that ball seat of giving up causes in core lance giving up, decrease the loss of component, reduce operating cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of bridging plug of the present utility model;
Fig. 2 is the partial enlarged drawing at A place in Fig. 1.
Detailed description of the invention
The embodiment of bridging plug in the utility model: as depicted in figs. 1 and 2, this bridging plug is that certainly losing in the oil well production string adopted under being applicable to envelope in a kind of oilfield exploitation technical field drags for formula bridging plug, primarily of releasing gadget, upper anchor mechanism, setting mechanism, lower anchor mechanism and changement composition, wherein changement is made up of fairlead 23 and guide finger 24, lower anchor mechanism is by lower steady nail 2215, centralizer body 21, friction plate, spring 19, "down hinge 18, lower slips 17, lower cone 16 forms, setting mechanism is by upper steady nail 15, shear pin 14, setting circle 13, middle packing element 12, upper packing element 10, lower rubber cylinder, spacer ring 9, variable buckle joint 8 forms, changement, lower anchor mechanism, the periphery that setting mechanism is assemblied in central tube 11 forms Y221 type anchor packer, the bottom of central tube 11 connects lower contact 25, upper anchor mechanism forms primarily of upper slips 7, releasing gadget is made up of fishing joint 6, ball seat 5 of giving up, core lance 3 of giving up, lock ring 4, the lower side member of releasing gadget and upper anchor mechanism are all assemblied in the top of variable buckle joint 8, the screw top of the core lance 3 of giving up of back-off sub is connected in top connection 1, the periphery of top connection 1 to be connected urceolus 2 by pin, urceolus 2 is sleeved on gives up on the periphery of core lance 3, and the lower end of urceolus 2 is docked at the top of variable buckle joint 8.
Giving up that the bottom of core lance 3 is provided with can the lance pawl plug 31 that actuates of radial elastic, the top of fishing joint 6 is provided with the connection jack 61 inserted for lance pawl plug 31, and the bottom of ball seat 5 of giving up is spacing to be connected in fishing joint 6 in the part connecting jack less than 61, the give up top of ball seat 5 is provided with from connecting the ball seat plug 51 passed in jack 61, lance pawl plug 31 is outwards strutted in the lance pawl plug 31 that this ball seat plug 51 can insert core lance 3 of giving up, and the outer peripheral face of ball seat plug 51 and the wall surface of the hole being connected jack 61 surround the annular slot inserted for lance pawl plug 31, connect and correspondingly in the wall surface of the hole of jack 61 and the outside wall surface of lance pawl plug 31 be provided with coupling mutually and the docking structure that is connected, this docking structure is connect the outer connecting thread that the outside wall surface of interior connecting thread and the lance pawl plug 31 that the wall surface of the hole of jack 61 is processed is processed, the connection wall surface of the hole of jack 61 and the outside wall surface of lance pawl plug 31 are again from the top down the intilted conical surface gradually.In the part of the spacing connection jack less than 61 being connected to fishing joint 6 of ball seat 5 of giving up, the periphery of ball seat 5 of giving up is convexly equipped with limiting block edge, in fishing joint 6, is provided with block at the limited step of limiting block along below in the part connecting jack less than 61.Give up ball seat 5 be inserted in limiting block along following stapled section fishing joint 6 in the part connecting jack less than 61, and be provided with all surface seal structures between the side face of the mutual inserting of give up ball seat 5 and fishing joint 6.
The periphery of the bottom of fishing joint 6 is provided with for wedging the wedge shape conical surface outwards strutting slips inside slips, in this wedge shape conical surface and upper anchor mechanism, the interior sidewall surface of upper slips 7 coordinates, with when fishing joint 6 is descending, to be inserted by this wedge shape conical surface in the interior sidewall surface of upper slips 7 and relatively wedging, be anchored on the internal face of pit shaft to make upper slips 7 outwards open.
In the present embodiment, bridging plug is in use, and under being connected in oil well pump, under oil well pump, inlet valve is can input type oil feeding valve or can pouring-in inlet valve, and specific works process is as follows:
Time under tubing string to destination locations, setting: upper lifting pipe post, rotating forward 5-8 circle, slowly transfer, centralizer body 21 relies on the tension force of spring 19 to cause the orbiting motion of frictional force along fairlead 23 of itself and well bore wall, guide finger 24 skids off along the top dead-centre of groove on fairlead 23, lower slips 17 is just by lower cone distending, and card jail is on shaft in wall, and now the weight of tubing string is just compressed packing element and realized setting.
Give up: suppress and make fishing joint 6 descending, promotion upper slips 7 outwards opens and is anchored on well bore wall, because the conical surface of fishing joint 6 is less than Self-locking angle, upper slips 7 is pinned, ball seat 5 of simultaneously giving up no longer retrains the bottom of the lance pawl plug of core lance 3 of giving up, inwardly can shrink with the bottom of the lance pawl that makes to give up and depart from lock ring 4, the upper hole of relative fishing joint 6 inside no longer surrounds lock ring 4, lock ring 4 can outwards movement, lock ring 4 loses the locking action to core lance 3 of giving up, making can throw off from losing the upper and lower of dragging for formula bridging plug, realizing giving up.
Deblocking and salvaging: by descending for former tubing string, visit top of fish and rotate forward, and make to give up core lance 3 lower thread and fishing joint 6 internal whorl screw, upper lifting pipe post, and fishing joint 6 is up, and upper slips 7 is regained from well bore wall; Central tube 11 moves, and guide finger 24 moves to the bottom dead centre of fairlead 23, and lower cone exits lower slips 17, and lower slips 17 reclaims, and meanwhile, packing element also regains deblocking, and tubing string can take out from pit shaft.
In the above-described embodiments, the upper cone of fishing joint and driving upper slips unites two into one, both in releasing gadget, the effect connecting core lance of giving up had been played to make this fishing joint, the effect strutting upper slips is played again in upper anchor mechanism, in other embodiments, fishing joint also can be arranged with upper cone split, and namely fishing joint is simple coordinating with core lance of giving up.
In the above-described embodiments, achieved a butt joint by the connecting thread on the conical surface between lance pawl plug and connection jack, in other embodiments, this connecting thread also can be in and face directly, and even the docking of the form such as the docking structure of this connecting thread formula also can connect with interference, buckle connection, spinner connection is connected.
In the above-described embodiments, giving up to be coordinated by block between ball seat and fishing joint realizes spacing assembling, and in other embodiments, give up ball seat and fishing joint also can directly be connected or be wholely set.
The embodiment of releasing gadget in the utility model: in the present embodiment, the structure of releasing gadget is identical with the structure of releasing gadget in above-described embodiment, therefore repeats no more.

Claims (10)

1. releasing gadget, comprise give up core lance and fishing joint opposing upper and lower, giving up that the bottom of core lance is provided with can the lance pawl plug that actuates of radial elastic, the top of fishing joint is provided with the connection jack inserted for lance pawl plug, it is characterized in that, be provided with in fishing joint and be connected jack with the spacing connection of lower part or be fixedly connected with or the ball seat of giving up that connects of one, the give up top of ball seat is provided with and stretches into or through connecting jack, for inserting the ball seat plug strutting lance pawl plug in lance pawl plug, outer peripheral face and the wall surface of the hole being connected jack of ball seat plug surround the annular slot inserted for lance pawl plug, and the docking structure that can mutually be connected is provided with on the connection wall surface of the hole of jack and the outside wall surface of lance pawl plug.
2. releasing gadget according to claim 1, is characterized in that, docking structure is connecting thread, and the connection wall surface of the hole of jack and the outside wall surface of lance pawl plug are from the top down the intilted conical surface gradually.
3. releasing gadget according to claim 1 and 2, it is characterized in that, in part below the spacing connection jack being connected to fishing joint of ball seat of giving up, give up ball seat periphery on be convexly equipped with limiting block edge, be provided with block at the limited step of limiting block along below in the part connecting below jack in fishing joint.
4. releasing gadget according to claim 3, it is characterized in that, give up ball seat be inserted in limiting block along following stapled section fishing joint in connecting in the part below jack, and be provided with all surface seal structures between the side face of the mutual inserting of give up ball seat and fishing joint.
5. releasing gadget according to claim 1 and 2, is characterized in that, the periphery of the bottom of fishing joint is provided with for wedging the wedge shape conical surface outwards strutting slips inside slips.
6. bridging plug, comprise the anchor mechanism of releasing gadget and below connection thereof, releasing gadget comprises give up core lance and fishing joint opposing upper and lower, giving up that the bottom of core lance is provided with can the lance pawl plug that actuates of radial elastic, the top of fishing joint is provided with the connection jack inserted for lance pawl plug, it is characterized in that, be provided with in fishing joint and be connected jack with the spacing connection of lower part or be fixedly connected with or the ball seat of giving up that connects of one, the give up top of ball seat is provided with and stretches into or through connecting jack, for inserting the ball seat plug strutting lance pawl plug in lance pawl plug, outer peripheral face and the wall surface of the hole being connected jack of ball seat plug surround the annular slot inserted for lance pawl plug, and the docking structure that can mutually be connected is provided with on the connection wall surface of the hole of jack and the outside wall surface of lance pawl plug.
7. bridging plug according to claim 6, is characterized in that, docking structure is connecting thread, and the connection wall surface of the hole of jack and the outside wall surface of lance pawl plug are from the top down the intilted conical surface gradually.
8. the bridging plug according to claim 6 or 7, it is characterized in that, in part below the spacing connection jack being connected to fishing joint of ball seat of giving up, give up ball seat periphery on be convexly equipped with limiting block edge, be provided with block at the limited step of limiting block along below in the part connecting below jack in fishing joint.
9. bridging plug according to claim 8, it is characterized in that, give up ball seat be inserted in limiting block along following stapled section fishing joint in connecting in the part below jack, and be provided with all surface seal structures between the side face of the mutual inserting of give up ball seat and fishing joint.
10. the bridging plug according to claim 6 or 7, is characterized in that, the periphery of the bottom of fishing joint is provided with for wedging the wedge shape conical surface outwards strutting slips inside slips.
CN201520395886.4U 2015-06-10 2015-06-10 A kind of bridging plug and releasing gadget thereof Expired - Fee Related CN204716194U (en)

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105411456A (en) * 2015-12-21 2016-03-23 兰建庄 Rubbing machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105411456A (en) * 2015-12-21 2016-03-23 兰建庄 Rubbing machine

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GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20151021

Termination date: 20190610

CF01 Termination of patent right due to non-payment of annual fee