CN204941345U - A kind of radial well transfer with packing function - Google Patents

A kind of radial well transfer with packing function Download PDF

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Publication number
CN204941345U
CN204941345U CN201520481516.2U CN201520481516U CN204941345U CN 204941345 U CN204941345 U CN 204941345U CN 201520481516 U CN201520481516 U CN 201520481516U CN 204941345 U CN204941345 U CN 204941345U
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CN
China
Prior art keywords
center tube
packing
packing element
rubber sleeve
room
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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
CN201520481516.2U
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Chinese (zh)
Inventor
裴柏林
张遂安
刘秉谦
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China University of Petroleum Beijing CUPB
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China University of Petroleum Beijing CUPB
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Priority to CN201520481516.2U priority Critical patent/CN204941345U/en
Application granted granted Critical
Publication of CN204941345U publication Critical patent/CN204941345U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model provides a kind of radial well transfer with packing function, and this device is made up of top connection, upper center tube, upper packing rubber sleeve, zero turn radius room, lower center tube, lower packing rubber sleeve, lower contact; Upper and lower both sides, zero turn radius room are connected with upper center tube and lower center tube respectively, and upper center tube upper end is connected with top connection, and lower center tube lower end is connected with lower contact; Upper packing rubber sleeve is sleeved on outside upper center tube, and lower packing rubber sleeve is sleeved on outside lower center tube; Top connection lower end and lower contact upper end are respectively arranged with retainer ring.The utility model is applied to and realizes radial well drilling well and the integration of fracturing work instrument, and be that a kind of realized flexible drillstem newly turns to the downhole hardware with casing off, this device is simple to operate, safe and practical, and greatly can shorten the activity duration, cost-saving.

Description

A kind of radial well transfer with packing function
Technical field
The utility model relates to a kind of radial well transfer with packing function, belongs to oil field downhole tool.
Background technology
Radial well drilling technology is the New well drilling technology of rising in recent years, and radial well drilling technology adopts special transfer to realize flexible drillstem and turns to ultrashort radius of curvature, and utilizes the energy of high-pressure water jet to break rock.Radial well lateral aperture diameter is little, and therefore radial well is often applied in the development process of coal bed gas, shale gas to solve the problem of borehole wall stability difference.
Coal seam and shale reservoir permeability low, non-homogeneity is strong, must carry out fracturing reform on stream to reach the object of volume increase.Because radial well lateral aperture diameter is little, inclination section radius of curvature is short, conventional fractured horizontal well pipe string tool cannot be applied to radial well, therefore radial well fracturing work is often by means of packer packing spacer pipe, pump into fracturing fluid by oil pipe to payzone high pressure again, improve the pressure of fluid in radial well lateral aperture.When the fracture pressure of the fluid pressure in radial well lateral aperture higher than rock, rock rupture, forms crack.
This pressure break mode needs first to be proposed from down-hole by radial well drilling tool, then under enter packer.Play lower tubular column frequently and not only increase workload, more improve operating cost.
Utility model content
The utility model technical issues that need to address are just the defect overcoming prior art, a kind of radial well transfer with packing function is provided, it is applied to and realizes radial well drilling well and the integration of fracturing work instrument, that a kind of realized flexible drillstem newly turns to the downhole hardware with casing off, this device is simple to operate, safe and practical, and greatly can shorten the activity duration, cost-saving.
In order to achieve the above object, the utility model adopts following technical scheme:
The utility model provides a kind of radial well transfer with packing function, described device is by top connection, upper center tube, upper packing rubber sleeve, zero turn radius room, lower center tube, lower packing rubber sleeve, lower contact is formed, upper and lower both sides, described zero turn radius room are connected with upper center tube and lower center tube respectively, described upper center tube upper end is connected with top connection, described lower center tube lower end is connected with lower contact, described upper packing rubber sleeve is sleeved on outside upper center tube, described lower packing rubber sleeve is sleeved on outside lower center tube, described top connection lower end and lower contact upper end are respectively arranged with retainer ring.
Described zero turn radius indoor are provided with a flexible drillstem and turn to passage and two fluid courses, turn to vias inner walls to inlay rotating ball, and every bar fluid course entrance point is all provided with one way valve, and every bar fluid course is provided with three outlets.
Described upper packing rubber sleeve is made up of interior packing element and outer packing element, interior packing element and junction, outer packing element upper end adopt hot vulcanization process sulfuration to be integrated, cavity is had in the middle of interior packing element and outer packing element, lower end is provided with feed pathway, feed pathway and zero turn radius room fluid course outlet, connectivity part is provided with sealing ring sealing.
Described lower packing rubber sleeve is made up of interior packing element and outer packing element, interior packing element and junction, outer packing element lower end adopt hot vulcanization process sulfuration to be integrated, cavity is had in the middle of interior packing element and outer packing element, upper end is provided with feed pathway, feed pathway and zero turn radius room fluid course outlet, connectivity part is provided with sealing ring sealing.
Wherein, the cavity in described upper and lower packing rubber sleeve between inside and outside packing element is all interconnected with the fluid course of zero turn radius room.
Further, be provided with overflow ducts in described lower center tube, described overflow ducts exit is provided with deblocking pin, and described overflow ducts is communicated with the cavity between the interior packing element in lower packing rubber sleeve and outer packing element.Be provided with shearing piston in described lower center tube cavity, described shearing piston is connected with zero turn radius room underrun spring.
In work progress, first device is lowered into precalculated position from sleeve pipe, coiled tubing lower end connects flexible drillstem, and flexible drillstem turns to passage by vertically transferring level to by zero turn radius room, and flexible drillstem realizes self-advancing type and creeps under the effect of internal high pressure fluid.To be donely to creep into, after the operation such as well-flushing, fluid is injected to the annular space high pressure between coiled tubing and central tube, fluid enters fluid course by the one way valve on zero turn radius room, on the one hand, fluid flows in the cavity in lower center tube by fluid course, fluid forces shears descent of piston, until the motion of shearing piston is stopped by deblocking pin; On the other hand fluid flowed into upper and lower packing rubber sleeve by fluid course inside and outside packing element between cavity in, under pressure, fluid is full of the cavity between inside and outside packing element gradually, and force the realization of outwards expanding of outer packing element to set, stop injecting liquid to the annular space between coiled tubing and central tube.After setting, by coiled tubing to infusion fracturing fluid in lateral aperture, when the pressure break of fluid in lateral aperture is higher than rock rupture pressure, rock rupture, forms crack.After completing fracturing process, continue to inject high-pressure fluid to the annular space between coiled tubing and central tube, and improve constantly injection pressure, until when fluid infusion pressure reaches the pressure-bearing threshold of deblocking pin, shear piston and cut off pin, realize deblocking.
The utility model and existing Technical comparing have following beneficial effect:
(1) can realize radial well drilling well and the integration of fracturing work instrument, avoid for removing separately drilling well transfer and pressure break packing device workload large, duty cycle is long, the defect that cost is high.
(2) device is simple to operate, safe and reliable.
Accompanying drawing explanation
Fig. 1 is the utility model structure elevation.
Fig. 2 is the utility model structure left view.
Detailed description of the invention
As Fig. 1, shown in Fig. 2, the utility model provides a kind of radial well transfer with packing function, described device is by top connection 2, upper center tube 7, upper packing rubber sleeve 3, zero turn radius room 12, lower center tube 13, lower packing rubber sleeve 16, lower contact 17 is formed, both sides, described zero turn radius room about 12 are connected with upper center tube 7 and lower center tube 13 respectively, described upper center tube 7 upper end is connected with top connection 2, described lower center tube 13 lower end is connected with lower contact 17, described upper packing rubber sleeve 3 is sleeved on outside upper center tube 7, described lower packing rubber sleeve 16 is sleeved on outside lower center tube 13, described top connection 2 lower end and lower contact 17 upper end are respectively arranged with retainer ring.
Be provided with a flexible drillstem in described zero turn radius room 12 and turn to path 10 and two fluid courses 11, path 10 inwall is turned to inlay rotating ball 20, every bar fluid course 11 entrance point is all provided with one way valve 8, and every bar fluid course 11 is provided with three outlets.
Described upper packing rubber sleeve 3 is made up of interior packing element 6 and outer packing element 4, interior packing element 6 and junction, outer packing element 4 upper end adopt hot vulcanization process sulfuration to be integrated, cavity is had in the middle of interior packing element 6 and outer packing element 4, lower end is provided with feed pathway, feed pathway and zero turn radius room 12 fluid course 11 outlet, connectivity part is provided with sealing ring 9 and seals.
Described lower packing rubber sleeve 16 is made up of interior packing element 6 and outer packing element 4, interior packing element 6 and junction, outer packing element 4 lower end adopt hot vulcanization process sulfuration to be integrated, cavity is had in the middle of interior packing element 6 and outer packing element 4, upper end is provided with feed pathway, feed pathway and zero turn radius room 12 fluid course 11 outlet, connectivity part is provided with sealing ring 9 and seals.
Wherein, the cavity in described upper packing rubber sleeve 3 and lower packing rubber sleeve 16 between inside and outside packing element is all interconnected with the fluid course 11 of zero turn radius room 12.
Further, be provided with overflow ducts 14 in described lower center tube 13, described overflow ducts 14 exit is provided with deblocking pin 17, and described overflow ducts 14 is communicated with the cavity between the interior packing element 6 in lower packing rubber sleeve 16 and outer packing element 4.Be provided with in described lower center tube 13 cavity and shear piston 21, described shearing piston 21 is connected with zero turn radius room underrun spring 20.
In work progress, first device is lowered into precalculated position from sleeve pipe 1, coiled tubing 5 lower end connects flexible drillstem 19, and flexible drillstem 19 turns to path 10 by vertically transferring level to by zero turn radius room 12, and flexible drillstem 19 realizes self-advancing type and creeps under the effect of internal high pressure fluid.To be donely to creep into, after the operation such as well-flushing, fluid is injected to the annular space high pressure between coiled tubing 5 and central tube 7, fluid enters fluid course by the one way valve 8 on zero turn radius room, on the one hand, fluid flows in the cavity in lower center tube 13 by fluid course, it is descending that fluid forces shears piston 21, until the motion of shearing piston 21 is stopped by deblocking pin 15; On the other hand fluid flowed into upper and lower packing rubber sleeve by fluid course 11 inside and outside packing element between cavity in, under pressure, fluid is full of the cavity between inside and outside packing element gradually, and force the outside expansion realization of outer packing element 6 to set, stop injecting liquid to the annular space between coiled tubing 5 and central tube 7.After setting, by coiled tubing 5 to infusion fracturing fluid in lateral aperture, when the pressure break of fluid in lateral aperture is higher than rock rupture pressure, rock rupture, forms crack.After completing fracturing process, continue to inject high-pressure fluid to the annular space between coiled tubing 5 and central tube 7, and improve constantly injection pressure, until when fluid infusion pressure reaches the pressure-bearing threshold of deblocking pin 15, shear piston 21 and cut off pin 15, realize deblocking.
Last it is noted that obviously, above-described embodiment is only for the utility model example is clearly described, and the restriction not to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And thus the apparent change of amplifying out or variation be still among protection domain of the present utility model.

Claims (6)

1. the radial well transfer with packing function, it is characterized in that: described device is by top connection, upper center tube, upper packing rubber sleeve, zero turn radius room, lower center tube, lower packing rubber sleeve, lower contact is formed, upper and lower both sides, described zero turn radius room are connected with upper center tube and lower center tube respectively, described upper center tube upper end is connected with top connection, described lower center tube lower end is connected with lower contact, described upper packing rubber sleeve is sleeved on outside upper center tube, described lower packing rubber sleeve is sleeved on outside lower center tube, described top connection lower end and lower contact upper end are respectively arranged with retainer ring.
2. a kind of radial well transfer with packing function as claimed in claim 1, it is characterized in that: described zero turn radius indoor are provided with a flexible drillstem and turn to passage and two fluid courses, vias inner walls is turned to inlay rotating ball, every bar fluid course entrance point is all provided with one way valve, and every bar fluid course is provided with three outlets.
3. a kind of radial well transfer with packing function as claimed in claim 1, it is characterized in that: described upper packing rubber sleeve is made up of interior packing element and outer packing element, interior packing element and junction, outer packing element upper end adopt hot vulcanization process sulfuration to be integrated, cavity is had in the middle of interior packing element and outer packing element, lower end is provided with feed pathway, feed pathway and zero turn radius room fluid course outlet, connectivity part is provided with sealing ring sealing.
4. a kind of radial well transfer with packing function as claimed in claim 1, it is characterized in that: described lower packing rubber sleeve is made up of interior packing element and outer packing element, interior packing element and junction, outer packing element lower end adopt hot vulcanization process sulfuration to be integrated, cavity is had in the middle of interior packing element and outer packing element, upper end is provided with feed pathway, feed pathway and zero turn radius room fluid course outlet, connectivity part is provided with sealing ring sealing.
5. a kind of radial well transfer with packing function as described in claim 1 or 3 or 4, is characterized in that: the cavity in described upper and lower packing rubber sleeve between inside and outside packing element is all interconnected with the fluid course of zero turn radius room.
6. a kind of radial well transfer with packing function as described in claim 1 or 4, it is characterized in that: in described lower center tube, be provided with overflow ducts, described overflow ducts exit is provided with deblocking pin, this overflow ducts is communicated with the cavity between the interior packing element in lower packing rubber sleeve and outer packing element, be provided with shearing piston in described lower center tube cavity, described shearing piston is connected with zero turn radius room underrun spring.
CN201520481516.2U 2015-07-07 2015-07-07 A kind of radial well transfer with packing function Expired - Fee Related CN204941345U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520481516.2U CN204941345U (en) 2015-07-07 2015-07-07 A kind of radial well transfer with packing function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520481516.2U CN204941345U (en) 2015-07-07 2015-07-07 A kind of radial well transfer with packing function

Publications (1)

Publication Number Publication Date
CN204941345U true CN204941345U (en) 2016-01-06

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106337666A (en) * 2015-07-07 2017-01-18 中国石油大学(北京) Underground packer realizing radial well drilling tool turning
CN106761535A (en) * 2016-11-24 2017-05-31 中国石油大学(北京) A kind of packer
CN109751010A (en) * 2017-11-06 2019-05-14 中国石油化工股份有限公司华北油气分公司石油工程技术研究院 packer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106337666A (en) * 2015-07-07 2017-01-18 中国石油大学(北京) Underground packer realizing radial well drilling tool turning
CN106337666B (en) * 2015-07-07 2018-10-16 中国石油大学(北京) A kind of downhole packing device that achievable radial well drilling tool turns to
CN106761535A (en) * 2016-11-24 2017-05-31 中国石油大学(北京) A kind of packer
CN109751010A (en) * 2017-11-06 2019-05-14 中国石油化工股份有限公司华北油气分公司石油工程技术研究院 packer

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

Granted publication date: 20160106

Termination date: 20160707