CN202100221U - Coiled tubing fracturing string suspension tripping device - Google Patents

Coiled tubing fracturing string suspension tripping device Download PDF

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Publication number
CN202100221U
CN202100221U CN2011202150611U CN201120215061U CN202100221U CN 202100221 U CN202100221 U CN 202100221U CN 2011202150611 U CN2011202150611 U CN 2011202150611U CN 201120215061 U CN201120215061 U CN 201120215061U CN 202100221 U CN202100221 U CN 202100221U
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CN
China
Prior art keywords
coiled tubing
ring
string
outer tube
fracturing
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 - Lifetime
Application number
CN2011202150611U
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Chinese (zh)
Inventor
吴志俊
陈曙光
陈辽望
宋翔虎
周坤
张景利
韩冬深
张子明
宋新民
杨生文
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Petrochina Co Ltd
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Petrochina Co Ltd
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Publication date
Application filed by Petrochina Co Ltd filed Critical Petrochina Co Ltd
Priority to CN2011202150611U priority Critical patent/CN202100221U/en
Application granted granted Critical
Publication of CN202100221U publication Critical patent/CN202100221U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model relates to a coiled tubing fracturing string suspension disconnecting device, which consists of a hanger and a disconnecting device; the hanger is fixedly arranged below the wellhead hanging sealing device; the upper end of the disconnecting connector is connected with a continuous oil pipe, and the lower end of the disconnecting connector is connected with a fracturing pipe string; the utility model discloses a coiled tubing fracturing string hangs disconnect-connect device can be at the well head smoothly with fracturing string and coiled tubing throw off, make coiled tubing can take out from well head and preventer to hang the fracturing string below the well head, solved coiled tubing fracturing tool string overlength effectively, can not play in time after the stratum fracturing and influence the problem of production; the utility model discloses not only can realize taking the pressure operation, the protective stratum, the length of fracturing tool string will not receive the restriction of height between preventer and the wellhead main gate moreover, can adjust at will, makes the card between the tool string packer apart from greatly increased, the oil gas layer scope that can reform transform also greatly increased.

Description

Coiled tubing fracturing string suspension uncoupling device
Technical field
The utility model is about coiled tubing fracturing tool in a kind of oil field development, relate in particular to a kind of can coiled tubing and fracturing tool pipe string be thrown off at the well head place and will manage go here and there the suspension uncoupling device of staying the well head place.
Background technology
In existing coiled tubing fracturing technology, fracturing tool pipe polyphone is connected on the coiled tubing and with constructing in the oil pipe lower going-into-well; After pressure break finished, the fracturing tool string tripped out with coiled tubing simultaneously; But because after the pressure break, the flow conductivity on stratum improves greatly, flow quantity increases in the well thereby cause, and pressure increases substantially; In order to prevent the well head blowing, the scene has two kinds of schemes to solve, and first kind of scheme is exactly Operating Pressure, and the external diameter of external coiled tubing fracturing tool pipe string is less than the internal diameter of well head; Greater than the preventer internal diameter, can when treating that the pipe string all trips out the well head main shutter, turn off main shutter with mentioning the preventer below on the pipe string; Lay down preventer, take out the tool pipe string, but owing to receive the restriction of height between preventer and the well head main shutter; The length of pressure break pipe string can only be less than 7.6m, and like this, the card of packer is apart from just also little than 7.6m; Can only transform the very thin oil reservoir of 1.5-6.1m, and at the scene, the oil reservoir that needs to transform much all is thicker oil reservoir; The packer card of fracturing tool pipe string is far longer than 7.6m apart from needs, so just can not turn off the well head main shutter, extraction tool pipe string; The result who causes be exactly not only coiled tubing rise to come out and influence production, and the coiled tubing car rests on the scene all the time, caused the waste of great amount of manpower and material resources.Second kind of scheme is to use the mode of kill job to take out fracturing tool pipe string, but does easy destruction stratum like this, makes the oil recovery DeGrain.
In view of this, the inventor relies on relevant design and manufacturing experience for many years, proposes a kind of coiled tubing fracturing string suspension uncoupling device, to overcome the defective of prior art.
The utility model content
The purpose of the utility model is to provide a kind of coiled tubing fracturing string suspension uncoupling device; Can smoothly pressure break pipe string and coiled tubing be thrown off at well head; Coiled tubing is extracted out in well head and preventer; And pressure break pipe string is suspended on well head below, and do not influence ordinary production to reach, effectively solve the long problem that behind formation breakdown, can not in time trip out of coiled tubing fracturing tool pipe string.
The purpose of the utility model is achieved in that a kind of coiled tubing fracturing string suspension uncoupling device, and said suspension uncoupling device is made up of a hanger and an on-off connector; Said hanger is fixedly installed on the below of well head suspension sealing device; Said on-off connector upper end connects coiled tubing, and the on-off connector lower end connects pressure break pipe string; Said on-off connector comprises an outer tube; The outer tube bottom is fixedly connected a lower contact; In outer tube, wear an inner central tube by outer sleeve upper, outer tube is tilted to outer wall by inwall and is provided with oblique open-work, and the outside wall surface of the inner central tube corresponding with oblique open-work is provided with groove; One lock dog passes said oblique open-work and is fastened in the groove of inner central tube, so that outer tube is connected with inner central tube; One sheath is arranged on the outer tube outer wall in the said lock dog outside; Said sheath upper end is inboard to connect an adjustable ring by shear pin, and adjustable ring extends setting to outer sleeve upper, and the outer sleeve upper outside is fixed with a relay ring, on the outer tube outer wall between said relay ring and the adjustable ring, is provided with jump ring; Said hanger is made up of the force bearing ring that a tubulose catching device and catching device inside lower end fixedly install; The internal diameter of said force bearing ring is greater than the external diameter of relay ring and less than the external diameter of jump ring and sheath; The bottom of said force bearing ring forms first inclined-plane of flaring from inside to outside, and the top of said jump ring forms second inclined-plane corresponding with first inclined-plane.
In a preferred embodiments of the utility model, the oblique open-work on the said outer tube is symmetrical set two.
In a preferred embodiments of the utility model, said lock dog bottom is provided with chamfering with the joint end of groove.
In a preferred embodiments of the utility model, said force bearing ring and catching device are by being threaded, and the force bearing ring internal diameter is less than the catching device internal diameter, and force bearing ring and catching device junction form an end difference.
In a preferred embodiments of the utility model, on said outer tube outer wall and be positioned at oblique open-work upside and be provided with a shaft shoulder, the bottom of said adjustable ring is resisted against on this shaft shoulder.
In a preferred embodiments of the utility model, said lower contact upper end and outer tube bottom are by being threaded.
From the above mentioned; The coiled tubing fracturing string suspension uncoupling device of the utility model can be thrown off pressure break pipe string and coiled tubing at well head smoothly; Coiled tubing can be extracted out in well head and preventer; And pressure break pipe string is suspended on well head below, it is long to have solved coiled tubing fracturing tool pipe string effectively, behind formation breakdown, can not in time trip out and influences the problem of production; The utility model not only can be realized Operating Pressure; The protection stratum, and the length of fracturing tool string will not receive between preventer and the well head main shutter restriction of height, can arbitrarily adjust; Card distance between the tool string packer is increased greatly, and transformable oil-gas Layer scope also increases greatly.
Description of drawings
Following accompanying drawing only is intended to the utility model is done schematic illustration and explanation, does not limit the scope of the utility model.Wherein:
Fig. 1: the structural representation that hangs the uncoupling device for the coiled tubing fracturing string of the utility model.
Fig. 2: be the structural representation of the utility model coiled tubing fracturing string suspension uncoupling device installation site.
Fig. 3 A: be the structural representation one of jump ring.
Fig. 3 B: be the structural representation two of jump ring.
The specific embodiment
Understand for technical characterictic, purpose and effect to the utility model have more clearly, contrast the specific embodiment of description of drawings the utility model at present.
Like Fig. 1, shown in Figure 2, the utility model proposes a kind of coiled tubing fracturing string suspension uncoupling device 100, and said suspension uncoupling device 100 is made up of an on-off connector 1 and a hanger 2; Said hanger 2 is fixedly installed on the below of well head suspension sealing device 3, and its effect is exactly when pressure break finishes after, the docking of realization and on-off connector 1 below well head, and with the pressure break pipe tandem junction of coiled tubing bottom on said hanger 2; Said on-off connector 1 upper end connects coiled tubing 4, and on-off connector 1 lower end connects pressure break pipe string 5; As shown in Figure 1, said on-off connector 1 comprises an outer tube 11, and outer tube 11 bottoms are fixedly connected a lower contact 12, and in this embodiment, said lower contact 12 upper ends and outer tube 11 bottoms are by being threaded; The lower end of said lower contact 12 connects said pressure break pipe string 5; In outer tube, wear an inner central tube 13 by outer tube 11 upper ends, the top of this inner central tube 13 connects said coiled tubing 4; As shown in Figure 1, outer tube 11 is tilted to outer wall by inwall and is provided with oblique open-work 111; In this embodiment, the oblique open-work 11 on the said outer tube 11 can be symmetrical set two; Said oblique open-work 11 is 60 ° with axis angle the best of outer tube 11; The outside wall surface of the inner central tube 13 corresponding with oblique open-work 111 is provided with groove 131, one lock dogs 14 and passes said oblique open-work 111 and be fastened in the groove 131 of inner central tube, and the joint end of said lock dog 14 bottoms and groove 131 is provided with chamfering 141 (as shown in Figure 1); One sheath 15 is set on outer tube 11 outer walls in said lock dog 14 outsides; Thus; Outer tube 11 just fixes as one with inner central tube 13; Contact when sheath 15 slides and loses with lock dog 14, inner central tube 13 will the chamfering 141 along lock dog 14 back down lock dog under the effect of upper lifting force, and inner central tube 13 will separate with outer tube 11; Inboard, said sheath 15 upper end connects an adjustable ring 17 by shear pin 16; On said outer tube 11 outer walls and be positioned at oblique open-work 111 upsides and be provided with a shaft shoulder 112; The bottom of said adjustable ring 17 is resisted against on this shaft shoulder 112; Setting is extended to the upper end of outer tube 11 in adjustable ring 17 upper ends; The outside, outer tube 11 upper ends is fixed with a relay ring 19, on outer tube 11 outer walls between said relay ring 19 and the adjustable ring 17, is provided with jump ring 18; In this embodiment, said jump ring 18 is the elastic ring body (shown in Fig. 3 A, Fig. 3 B) that a side is provided with pass through openings 182, but radial contraction behind jump ring 18 pressurizeds; Said hanger 2 reaches the force bearing ring 22 that fixedly installs in the catching device inside lower end by a tubulose catching device 21 and constitutes; The internal diameter of said force bearing ring 22 is greater than the external diameter of relay ring 19 and less than the external diameter of jump ring 18 and sheath 15; Said force bearing ring 22 and catching device 21 are by being threaded, and force bearing ring 22 internal diameters are less than catching device 21 internal diameters, and force bearing ring 22 forms an end difference 222 with catching device 21 junctions; The bottom of said force bearing ring 22 forms first inclined-plane 221 of flaring from inside to outside, and the top of said jump ring 18 forms second inclined-plane 181 corresponding with first inclined-plane 221.
As shown in Figure 2, the use of the coiled tubing fracturing string of the utility model suspension uncoupling device is: before the construction, on-off connector 1 upper end is connected with coiled tubing 4, on-off connector 1 lower end connects with fracturing tool pipe string 5 also in the lower going-into-well; Hanger 2 linked through screw thread with well head suspension sealing device 3 hangs on the well head below, sets well head, when pressing crack construction begins, fracturing tool pipe string 5 is lowered into designated depth carries out pressure break; After pressure break finishes, on carry and reclaim coiled tubing 4, on-off connector 1 arrives hanger 2 belows; Carry coiled tubing in the continuation, the force bearing ring 22 of hanger 2 comes in contact with the jump ring 18 of on-off connector 1, because the interaction on second inclined-plane 181 of first inclined-plane 221 of force bearing ring 22 and jump ring 18; The inwall of force bearing ring 22 slips over jump ring 18, and also the top is to sheath 15 with adjustable ring 6, and sheath 15 is cut off shear pin 16 under the active force of force bearing ring 22, and sheath 15 slides into outer tube 11 bottoms with force bearing ring 22; At this moment, inner central tube 13 backs down lock dog 14 under the effect of coiled tubing 4 upper lifting forces, and inner central tube 13 has just been realized and the separating of outer tube 11; At this moment; Inner central tube 13 is along with coiled tubing 4 makes progress through shifting out well head behind the said catching device 21, and jump ring 18 flicks again after slipping over force bearing ring 22 inwalls, and fastens the end difference 222 in force bearing ring 22 upper ends by the bottom of jump ring 18; Thus, outer tube 11, lower contact 12 and pressure break pipe string 5 are suspended on the said hanger 2; When inner central tube 13 passes well head main shutter 6, just can turn off main shutter, and reclaim coiled tubing 4; And then open the main shutter production of normally recovering the oil.
From the above mentioned; Because the coiled tubing fracturing string of the utility model suspension uncoupling device can be thrown off pressure break pipe string and coiled tubing at well head smoothly; Coiled tubing is extracted out in well head and preventer; And pressure break pipe string is suspended on well head below, it is long to have solved coiled tubing fracturing tool pipe string effectively, behind formation breakdown, can not in time trip out and influences the problem of production; The utility model not only can be realized Operating Pressure; The protection stratum, and the length of fracturing tool string will not receive between preventer and the well head main shutter restriction of height, can arbitrarily adjust; Card distance between the tool string packer is increased greatly, and transformable oil-gas Layer scope also increases greatly.
The above is merely the schematic specific embodiment of the utility model, is not in order to limit the scope of the utility model.Any those skilled in the art, equivalent variations of under the prerequisite of design that does not break away from the utility model and principle, having done and modification all should belong to the scope that the utility model is protected.

Claims (6)

1. a coiled tubing fracturing string hangs the uncoupling device, and it is characterized in that: said suspension uncoupling device is made up of a hanger and an on-off connector; Said hanger is fixedly installed on the below of well head suspension sealing device; Said on-off connector upper end connects coiled tubing, and the on-off connector lower end connects pressure break pipe string; Said on-off connector comprises an outer tube; The outer tube bottom is fixedly connected a lower contact; In outer tube, wear an inner central tube by outer sleeve upper; Outer tube is tilted to outer wall by inwall and is provided with oblique open-work, and the outside wall surface of the inner central tube corresponding with oblique open-work is provided with groove, and a lock dog passes said oblique open-work and is fastened in the groove of inner central tube; One sheath is arranged on the outer tube outer wall in the said lock dog outside; Said sheath upper end is inboard to connect an adjustable ring by shear pin, and adjustable ring extends setting to outer sleeve upper, and the outer sleeve upper outside is fixed with a relay ring, on the outer tube outer wall between said relay ring and the adjustable ring, is provided with jump ring; Said hanger is made up of the force bearing ring that a tubulose catching device and catching device inside lower end fixedly install; The internal diameter of said force bearing ring is greater than the external diameter of relay ring and less than the external diameter of jump ring and sheath; The bottom of said force bearing ring forms first inclined-plane of flaring from inside to outside, and the top of said jump ring forms second inclined-plane corresponding with first inclined-plane.
2. coiled tubing fracturing string suspension uncoupling device as claimed in claim 1, it is characterized in that: the oblique open-work on the said outer tube is symmetrical set two.
3. coiled tubing fracturing string suspension uncoupling device as claimed in claim 1 is characterized in that: said lock dog bottom is provided with chamfering with the joint end of groove.
4. coiled tubing fracturing string as claimed in claim 1 suspension uncoupling device is characterized in that: said force bearing ring and catching device are by being threaded, and the force bearing ring internal diameter is less than the catching device internal diameter, and force bearing ring and catching device junction form an end difference.
5. coiled tubing fracturing string as claimed in claim 1 suspension uncoupling device is characterized in that: on said outer tube outer wall and be positioned at oblique open-work upside and be provided with a shaft shoulder, the bottom of said adjustable ring is resisted against on this shaft shoulder.
6. coiled tubing fracturing string as claimed in claim 1 suspension uncoupling device is characterized in that: said lower contact upper end and outer tube bottom are by being threaded.
CN2011202150611U 2011-06-23 2011-06-23 Coiled tubing fracturing string suspension tripping device Expired - Lifetime CN202100221U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011202150611U CN202100221U (en) 2011-06-23 2011-06-23 Coiled tubing fracturing string suspension tripping device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011202150611U CN202100221U (en) 2011-06-23 2011-06-23 Coiled tubing fracturing string suspension tripping device

Publications (1)

Publication Number Publication Date
CN202100221U true CN202100221U (en) 2012-01-04

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CN2011202150611U Expired - Lifetime CN202100221U (en) 2011-06-23 2011-06-23 Coiled tubing fracturing string suspension tripping device

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102251753A (en) * 2011-06-23 2011-11-23 中国石油天然气股份有限公司 Coiled tubing fracturing string suspension tripping device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102251753A (en) * 2011-06-23 2011-11-23 中国石油天然气股份有限公司 Coiled tubing fracturing string suspension tripping device
CN102251753B (en) * 2011-06-23 2013-10-16 中国石油天然气股份有限公司 Coiled tubing fracturing string suspension tripping device

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C14 Grant of patent or utility model
GR01 Patent grant
C53 Correction of patent for invention or patent application
CB03 Change of inventor or designer information

Inventor after: Wu Zhijun

Inventor after: Yang Shengwen

Inventor after: Zhou Rui

Inventor after: Zhang Jun

Inventor after: Li Jun

Inventor after: Han Feng

Inventor after: Xu Le

Inventor after: Sun Meiling

Inventor after: Bai Jianfeng

Inventor after: Lin Shulong

Inventor after: Wang Zhansheng

Inventor after: Chen Shuguang

Inventor after: Li Juanjuan

Inventor after: Xiong Mei

Inventor after: Chen Liaowang

Inventor after: Song Xianghu

Inventor after: Zhou Kun

Inventor after: Zhang Jingli

Inventor after: Han Dongshen

Inventor after: Zhang Ziming

Inventor after: Song Xinmin

Inventor before: Wu Zhijun

Inventor before: Yang Shengwen

Inventor before: Chen Shuguang

Inventor before: Chen Liaowang

Inventor before: Song Xianghu

Inventor before: Zhou Kun

Inventor before: Zhang Jingli

Inventor before: Han Dongshen

Inventor before: Zhang Ziming

Inventor before: Song Xinmin

COR Change of bibliographic data

Free format text: CORRECT: INVENTOR; FROM: WU ZHIJUN CHEN SHUGUANG CHEN LIAOWANG SONG XIANGHU ZHOU KUN ZHANG JINGLI HAN DONGSHEN ZHANG ZIMING SONG XINMIN YANG SHENGWEN TO: WU ZHIJUN CHEN SHUGUANG CHEN LIAOWANG SONG XIANGHU ZHOU KUN ZHANG JINGLI HAN DONGSHEN ZHANG ZIMING SONG XINMIN YANG SHENGWEN ZHOU RUI ZHANG JUN LI JUN HAN FENG XU LE SUN MEILING BAI JIANFENG LIN SHULONG WANG ZHANSHENG LI JUANJUAN XIONG MEI

AV01 Patent right actively abandoned

Granted publication date: 20120104

Effective date of abandoning: 20131016

RGAV Abandon patent right to avoid regrant