CN202370461U - Nib flush head for coiled tubing - Google Patents
Nib flush head for coiled tubing Download PDFInfo
- Publication number
- CN202370461U CN202370461U CN201120519338XU CN201120519338U CN202370461U CN 202370461 U CN202370461 U CN 202370461U CN 201120519338X U CN201120519338X U CN 201120519338XU CN 201120519338 U CN201120519338 U CN 201120519338U CN 202370461 U CN202370461 U CN 202370461U
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- CN
- China
- Prior art keywords
- nib
- coiled tubing
- syringe pipe
- flush head
- section
- 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
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Abstract
The utility model discloses a nib flush head for a coiled tubing, which comprises an upper connector and a flush head body, wherein a central water hole penetrating the upper connector and the flush head body is formed inside the upper connector and the flush head body; one end of the flush head body is integrated with the upper connector, and the other end comprises a chamfer section and an oblique cut section; and the chamfer section and the oblique cut section form the shape of a nib. The nib flush head for the coiled tubing improves the flow rate of liquor flowing through the water hole, and enhances the erosion effect on sediments by the liquor; the nib-shaped lower end greatly reduces the contact area with the sediments; therefore, the insertion of the flush head into the hardened sediments at a lower bit pressure is facilitated, and further the blockage in the well is eliminated.
Description
Technical field
The utility model relates to a kind of coiled tubing and uses the nib syringe pipe, is used for coiled tubing the oil gas well being carried out the sand washing de-plugging, belongs to petroleum gas down-hole workover treatment technical field.
Background technology
Coiled tubing sand washing block releasing technique is that in the oil gas field workover treatment uses always and important techniques, is usually used in motionless pipe string and removes oil pipe or sleeve pipe obstruction in the oil gas well, the production that recovers the oil gas well.Or remove the just obstruction in the instrumentation tubes string in the oil gas well of operation, so that go on foot carrying out of operation down.Coiled tubing is isometrical continuous pipe, and middle no box cupling is prone to realize dynamic seal (packing), can realize Operating Pressure, can allow higher well head pressure during Operating Pressure.Therefore, need not carry out kill job, reduce the formation contaminant that causes because of working solution entering stratum.Coiled tubing sand washing de-plugging can realize the operation of motionless pipe string, can significantly reduce operating cost.Sand washing de-plugging in the oil pipe string of open hole packer completion has not only reduced operating cost, and has reduced the difficulty of operation greatly.
And in the prior art, coiled tubing sand washing de-plugging is owing to receive drum capacity, the restriction of latus rectum in the tool string in well depth requirement and the well; Have to use the less coiled tubing of external diameter; Like the 31.75mm coiled tubing, interior continuously frictional resistance is very big, has limited the discharge capacity of sand washing.Coiled tubing is being bent into plastic strain on the cylinder and on the jacket, after injection head is proofreaied and correct, exists residue crooked; The coiled tubing lower end is lowered in well to be close to tube wall and to walk in the process, so coiled tubing is hampered at the shoulder place in well head gate and tool string easily, and the trafficability characteristic in well is relatively poor; And adopt existing coiled tubing syringe pipe; Flow rate of fluid through hydrophthalmia is lower, has reduced fluid to sedimentary erosion effect, and the lower end of syringe pipe and sedimentary contact area are bigger; Be unfavorable for that syringe pipe embeds the sediment that hardens under lower the pressure of the drill, the obstruction in the well is easy-clear not.
Summary of the invention
The purpose of the utility model is to overcome the problems referred to above that existing coiled tubing syringe pipe exists; Provide a kind of coiled tubing to use the nib syringe pipe; The utility model has improved the flow rate of fluid through hydrophthalmia, has increased fluid to sedimentary erosion effect, and the lower end of nib shape has reduced and sedimentary contact area greatly; Help syringe pipe and under lower the pressure of the drill, embed the sediment that hardens, thereby remove the obstruction in the well.
For realizing above-mentioned purpose, the technical scheme that the utility model adopts is following:
A kind of coiled tubing is used the nib syringe pipe; It is characterized in that: comprise top connection and syringe pipe body; Be provided with the center hydrophthalmia that connects top connection and syringe pipe body in top connection and the syringe pipe body; Said syringe pipe body one end and top connection are integral, and the other end comprises chamfering section and chamfered section, and chamfering section and chamfered section form the nib shape.
The length of said chamfered section is greater than the length of chamfering section.
Said center hydrophthalmia has and only has one.
Said center hydrophthalmia along towards Xian's axon to setting.
Adopt the advantage of the utility model to be:
One, the utility model comprises top connection and syringe pipe body; Be provided with the center hydrophthalmia that connects top connection and syringe pipe body in top connection and the syringe pipe body, said syringe pipe body one end and top connection are integral, and the other end comprises chamfering section and chamfered section; Chamfering section and chamfered section form the nib shape; Adopt this structure can improve the trafficability characteristic of coiled tubing in well, prevent that the shoulder place in well head gate and tool string is hampered, the lower end of nib shape has reduced and sedimentary contact area greatly; Help syringe pipe and under lower the pressure of the drill, embed the sediment that hardens, thereby remove the obstruction in the well.
Two, in the utility model, the hydrophthalmia of syringe pipe body then adopts along the axial single hydrophthalmia of syringe pipe, has improved the flow rate of fluid through hydrophthalmia, has increased fluid to sedimentary erosion effect.
Three, in the utility model; The length of chamfered section is greater than the length of chamfering section; Both having satisfied the lower end has sharp blade, and having satisfied coiled tubing again has trafficability characteristic preferably in well head and well, has guaranteed that further syringe pipe embeds the sediment that hardens under lower the pressure of the drill.
Four, adopt the utility model after, the nib syringe pipe effectively destroys the glued and last sand setting of removing of sand setting to the embeddeding action of carving the shape end of the erosion effect of the glued sand setting in shaft bottom and nib syringe pipe with single hydrophthalmia of its fluid through vertically.
Five, the utility model patent principle clear, be skillfully constructed, simple in structure, the sand setting that can effectively remove in oil pipe in the oil gas well or the sleeve pipe stops up, and has carried out successful Application at Liang Koujing, can be widely used in coiled tubing sand washing operation.
Description of drawings
Fig. 1 is the utility model structural representation
Be labeled as among the figure: 1, top connection, 2, the syringe pipe body, 3, the center hydrophthalmia, 4, the chamfering section, 5, chamfered section.
The specific embodiment
A kind of coiled tubing is used the nib syringe pipe; Comprise top connection 1 and syringe pipe body 2; Be provided with the center hydrophthalmia 3 that connects top connection 1 and syringe pipe body 2 in top connection 1 and the syringe pipe body 2; Said syringe pipe body 2 one ends and top connection 1 are integral, and the other end comprises chamfering section 4 and chamfered section 5, and chamfering section 4 forms the nib shape with chamfered section 5.
The preferred implementation of the utility model does, the length of said chamfered section 5 is greater than the length of chamfering section 4, but is not limited thereto mode.
The another preferred implementation of the utility model is that said center hydrophthalmia 3 has and only has one, but is not limited thereto mode.
The another preferred implementation of the utility model is that hydrophthalmia 3 edges in said center axially are provided with towards Xian's body 2, but are not limited thereto mode.
The utility model belongs at oil gas well coiled tubing sand washing implement, and coiled tubing is the critical component of coiled tubing sand washing operation with syringe pipe.Coiled tubing can be 45# quenched and tempered steel or the higher steel of grade of steel with the material of nib syringe pipe.
The utility model patent nib syringe pipe is used at Liang Koujing, and is existing with the example that is applied as at the water horizontal well in Mo Xi gas field, introduces the application of the utility model patent.This well has replaced the above mud of hanging packer with coiled tubing after finishing horizontal well open hole packer pipe string down.Sprain when pressing off the pressure reduction sliding sleeve from oil pipe, the pressure drop of finding not have when opening shows that the pump pressure of normally opening the pressure reduction sliding sleeve is no more than 44MPa, the demonstration that the 65MPa that sprains does not at last open the pressure reduction sliding sleeve yet.Be judged as first and more than pitching sliding sleeve mud sediment arranged.Meter be hampered with spherical syringe pipe to 2923 under the 31.75mm coiled tubing for the first time, the 10KN that pressurizes washes no drilling depth repeatedly with 170 liters/minute discharge capacities.Spherical syringe pipe and coiled tubing are isometrical, and the lower end is a hemispherical, and the center hydrophthalmia is 12mm along the axis direction diameter, become 30 degree angles with axis along even three hydrophthalmias that distribute of circumference, and the hydrophthalmia diameter is 6mm.During 31.75mm coiled tubing sand washing for the second time down, with the oblique cutting of former spherical syringe pipe, after being hampered to 2923m down, the 20KN that pressurizes, washing repeatedly with 170 liters/minute discharge capacities does not still have drilling depth.During for the third time with the flushing of the nib syringe pipe of this novel practical of 31.75mm coiled tubing patent, coiled tubing demonstrations that through 2923m the time, significantly be not hampered is flushed to 3150m at last and washes out the sediment more than the 3150m.Play coiled tubing behind 2600m, annotate the pressure of spraining from the coiled tubing pump, bust is successfully opened the pressure reduction sliding sleeve to 40MPa when well head pressure arrives 44MPa.For the prop-carrying capacity that improves fluid and reduce, during this subjob, in sand cleaning fluid, add additive such as guanidine glue to increase the viscosity of sand cleaning fluid along the journey frictional resistance.
Claims (4)
1. a coiled tubing is used the nib syringe pipe; It is characterized in that: comprise top connection (1) and syringe pipe body (2); Be provided with the center hydrophthalmia (3) that connects top connection (1) and syringe pipe body (2) in top connection (1) and the syringe pipe body (2); Said syringe pipe body (2) one ends and top connection (1) are integral, and the other end comprises chamfering section (4) and chamfered section (5), and chamfering section (4) and chamfered section (5) form the nib shape.
2. coiled tubing according to claim 1 is used the nib syringe pipe, it is characterized in that: the length of said chamfered section (5) is greater than the length of chamfering section (4).
3. coiled tubing according to claim 1 and 2 is used the nib syringe pipe, it is characterized in that: said center hydrophthalmia (3) has and only has one.
4. coiled tubing according to claim 1 and 2 is used the nib syringe pipe, it is characterized in that: said center hydrophthalmia (3) is along axially being provided with towards Xian's body (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120519338XU CN202370461U (en) | 2011-12-13 | 2011-12-13 | Nib flush head for coiled tubing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120519338XU CN202370461U (en) | 2011-12-13 | 2011-12-13 | Nib flush head for coiled tubing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202370461U true CN202370461U (en) | 2012-08-08 |
Family
ID=46594168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120519338XU Expired - Lifetime CN202370461U (en) | 2011-12-13 | 2011-12-13 | Nib flush head for coiled tubing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202370461U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106894783A (en) * | 2015-12-18 | 2017-06-27 | 中国石油天然气股份有限公司 | The method of continuous tubing drill milling tamper |
| CN107401385A (en) * | 2017-08-02 | 2017-11-28 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | One kind injection erosion instrument and its application |
-
2011
- 2011-12-13 CN CN201120519338XU patent/CN202370461U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106894783A (en) * | 2015-12-18 | 2017-06-27 | 中国石油天然气股份有限公司 | The method of continuous tubing drill milling tamper |
| CN106894783B (en) * | 2015-12-18 | 2019-11-12 | 中国石油天然气股份有限公司 | The method of continuous tubing drill milling tamper |
| CN107401385A (en) * | 2017-08-02 | 2017-11-28 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | One kind injection erosion instrument and its application |
| CN107401385B (en) * | 2017-08-02 | 2023-11-17 | 中国石油天然气集团有限公司 | Jet erosion tool and application thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120808 |
|
| CX01 | Expiry of patent term |