CN104832110A - Flow distribution connector of double-layer continuous oil tube - Google Patents
Flow distribution connector of double-layer continuous oil tube Download PDFInfo
- Publication number
- CN104832110A CN104832110A CN201510249018.XA CN201510249018A CN104832110A CN 104832110 A CN104832110 A CN 104832110A CN 201510249018 A CN201510249018 A CN 201510249018A CN 104832110 A CN104832110 A CN 104832110A
- Authority
- CN
- China
- Prior art keywords
- continuous oil
- connector body
- layer continuous
- shunting connector
- oil tube
- 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.)
- Granted
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
Abstract
The invention discloses a flow distribution connector of a double-layer continuous oil tube. The connector comprises a cylindrical flow distribution connector body, and three segments of round inner channels are formed inwards in the axial direction from the top end of the flow distribution connector body. An outer-layer continuous oil tube body and an inner-layer continuous oil tube body of the double-layer continuous oil tube are erected on two steps respectively. A first inner screw thread used for fixing the outer-layer continuous oil tube body and a first installing groove for installing a sealing ring are formed on the pipe wall of the first segment of inner channel, a second inner screw thread used for fixing the inner-layer continuous oil tube body and a second installing groove for installing a sealing ring are formed on the pipe wall of the second segment of inner channel, a flow-in channel penetrating through the side wall of the connector body is formed in the side wall of the third segment of inner channel, and a flow-out bypass communicated with the outer-layer continuous oil tube body is formed in the axial direction of the flow distributing connector body and extends from the ejecting step of the outer-layer continuous oil tube body to the bottom end of the flow distributing connector body. The function that fluid flows out from the outer-layer continuous oil tube body and flows in from the inner-layer continuous oil tube body is achieved, and the work requirement, for carrying a tool, of the double-layer continuous oil tube is met.
Description
Technical field
The present invention relates to oil-gas field development technical field, for double layer continuous oil pipe and every construction function instrument connection and realize the bypassing circulation of liquid jaw elements inside and outside double layer continuous oil pipe, be the special tool of double layer continuous oil pipe operation.
Background technology
During the downhole tool applications such as double layer continuous oil pipe connecting screw rod brill, inside and outside two-layer coiled tubing need be connected with downhole tool string, also need to set up circulation canal between inside and outside two-layer coiled tubing simultaneously, make the fluid flowed out by the outer and interior pipe ring sky of double layer continuous oil pipe, ground (circulation of double layer continuous oil pipe inner and outer pipes) is back to, to carry out the small particle such as landwaste, impurity along this instrument inner pipe passway after bottom tool acting.
Conventionally, also there is no such connector.
Summary of the invention
Technical problem to be solved by this invention is, provides a kind of screw thread mode that adopts to be connected with double layer continuous oil pipe and downhole tool, and the shunting connector of the double layer continuous oil pipe of design cycle passage.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is: a kind of shunting connector of double layer continuous oil pipe, comprise columniform shunting connector body, three sections of circular internal channels with 2 grades of steps that one section of diameter reduces successively are axially inwardly formed from the top of shunting connector body, the outer coiled tubing of double layer continuous oil pipe and internal layer coiled tubing ride on two steps respectively, the tube wall of outermost first paragraph internal channel is formed fixed outer layer coiled tubing first in screw thread and install the first mounting groove of sealing ring, the tube wall of second segment internal channel is formed fixing internal layer coiled tubing second in screw thread and install the second mounting groove of sealing ring, the top of the 3rd section of the most inboard internal channel is positioned at inside shunting connector body, the flow channel of through connector body sidewall is formed at the sidewall of the 3rd section of internal channel, the bottom extending to shunting connector body along shunting connector body shaft to the step from outer coiled tubing top pressure in shunting connector body is formed with the through outflow bypass communicated with outer coiled tubing, the thread of connecting downhole instrument is provided with at the lower end outer wall of shunting connector body.
Described flow channel is two, along the formed symmetrical of shunting connector body.
Described flow channel tilts to the bottom of shunting connector body.
Described outflow bypass is two, and be the circular arc passage matched with shunting connector body shape, each outflow bypass lays respectively between two flow channels.
The port of export being positioned at the outflow bypass of the bottom of shunting connector body is formed with extension diameter section.
The invention has the beneficial effects as follows: be connected with inside and outside two-layer coiled tubing and associated downhole tool by thread, circulation canal on it, realize the function that fluid flows out from outer coiled tubing and flows into from internal layer coiled tubing, meet double layer continuous oil pipe band tool operation demand, carry out such as negative pressure sand washing, bore the construction operations such as mill.
Accompanying drawing explanation
Fig. 1 is the structural representation of the shunting connector of double layer continuous oil pipe of the present invention.
Fig. 2 is the schematic cross section of the shunting connector of double layer continuous oil pipe of the present invention.
Fig. 3 is that the using state of the shunting connector of double layer continuous oil pipe of the present invention flows to schematic diagram.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
As Fig. 1, shown in 2, the shunting connector of double layer continuous oil pipe of the present invention, comprise columniform shunting connector body 10, three sections of circular internal channels with 2 grades of steps that one section of diameter reduces successively are axially inwardly formed from the top of shunting connector body 10, the outer coiled tubing of double layer continuous oil pipe and internal layer coiled tubing ride on two steps respectively, the tube wall of outermost first paragraph internal channel is formed fixed outer layer coiled tubing first in screw thread 2 and install the first mounting groove 1 of sealing ring, the tube wall of second segment internal channel is formed fixing internal layer coiled tubing second in screw thread 4 and install the second mounting groove 3 of sealing ring, the top of the 3rd section of the most inboard internal channel 5 is positioned at inside shunting connector body 10, the flow channel 9 of through connector body 10 sidewall is formed at the sidewall of the 3rd section of internal channel 5, the bottom axially extending to shunting connector body 10 from the step of outer coiled tubing top pressure along shunting connector body 10 in shunting connector body 10 is formed with the through outflow bypass 6 communicated with outer coiled tubing, the thread 7 of connecting downhole instrument is provided with at the lower end outer wall of shunting connector body 10.
Described flow channel 9 is two, along the formed symmetrical of shunting connector body 10.
Described flow channel 9 tilts to the bottom of shunting connector body 10.
Described outflow bypass 6 is two, and be the circular arc passage with shunting connector body 10 mating shapes, each outflow bypass 6 lays respectively between two flow channels 9.
For the ease of the outflow of liquid, the port of export being positioned at the outflow bypass 6 of the bottom of shunting connector body 10 is formed with extension diameter section 8.
The shunting connector of double layer continuous oil pipe of the present invention, is mainly used in the operation of oil gas field double layer continuous oil pipe, the shunting of two-layer coiled tubing fluid and channel seal inside and outside when being connected with downhole tool for double layer continuous oil pipe.Screw thread on the shunting connector of double layer continuous oil pipe can with inside and outside two-layer coiled tubing and underground operation tool be connected and seal, circulation canal on device, highly pressurised liquid can be realized and flow out the function flowed into from internal layer coiled tubing from outer coiled tubing, meet such as negative pressure sand washing, bore the requirement of the construction operations such as mill.
As shown in Figure 3, the shunting connector of double layer continuous oil pipe of the present invention is by screwed connection ectonexine coiled tubing and corresponding tool, this connector has bypassing circulation passage, forms bypassing circulation and the expanding channels sealing of downhole fluid in inside and outside two-layer coiled tubing.During use, highly pressurised liquid is injected into outer coiled tubing and internal layer coiled tubing annular space through ground pump truck, enter in the outflow bypass 6 in the shunting connector of double layer continuous oil pipe, enter again in the such as function such as screw drill, negative pressure tool instrument and fulfil assignment, its returning fluid (carrying sand formation cuttings or milling chip) returns, enters the 3rd section of internal channel 5 through flow channel 9 and flow in internal layer coiled tubing and return to ground.Liquid, by flowing out bypass 6, entering the 3rd section of internal channel 5 formation circulation through flow channel 9, realizes the circulation in double layer continuous oil pipe.Highly pressurised liquid can be realized by this connector and flow out the function flowed into from internal layer coiled tubing from outer coiled tubing, meet such as negative pressure sand washing, bore the requirement of the construction operations such as mill.
During onsite application, first internal layer coiled tubing by second segment internal channel second in screw thread 4 be connected with this connector, then outer coiled tubing is connected with this connector by screw thread 2 in first of first paragraph internal channel, then downhole tool is attached thereto by thread 7.
During operation, ground high pressure pump truck outer layers coiled tubing injects highly pressurised liquid.Highly pressurised liquid enters from outer coiled tubing and flows out bypass 6, and then flow out from the passage of downhole tool, the highly pressurised liquid then flowed out enters into flow channel 9 from Oil/gas Well sleeve pipe, then is flow in internal layer coiled tubing by the 3rd section of internal channel 5 and return to ground.
In sum, content of the present invention is not limited in the above-described embodiment, and the knowledgeable people in same area can propose other embodiment easily within technological guidance's thought of the present invention, but this embodiment all comprises within the scope of the present invention.
Claims (5)
1. the shunting connector of a double layer continuous oil pipe, it is characterized in that, comprise columniform shunting connector body (10), three sections of circular internal channels with 2 grades of steps that one section of diameter reduces successively are axially inwardly formed from the top of shunting connector body (10), the outer coiled tubing of double layer continuous oil pipe and internal layer coiled tubing ride on two steps respectively, the tube wall of outermost first paragraph internal channel is formed fixed outer layer coiled tubing first in screw thread (2) and install first mounting groove (1) of sealing ring, the tube wall of second segment internal channel is formed fixing internal layer coiled tubing second in screw thread (4) and install second mounting groove (3) of sealing ring, the top of the 3rd section of the most inboard internal channel (5) is positioned at shunting connector body (10) the inside, the flow channel (9) of through connector body (10) sidewall is formed at the sidewall of the 3rd section of internal channel (5), the bottom axially extending to shunting connector body (10) from the step of outer coiled tubing top pressure along shunting connector body (10) in shunting connector body (10) is formed with the through outflow bypass (6) communicated with outer coiled tubing, the thread (7) of connecting downhole instrument is provided with at the lower end outer wall of shunting connector body (10).
2. the shunting connector of double layer continuous oil pipe according to claim 1, is characterized in that, described flow channel (9) is two, along the formed symmetrical of shunting connector body (10).
3. the shunting connector of double layer continuous oil pipe according to claim 2, is characterized in that, described flow channel (9) tilts to the bottom of shunting connector body (10).
4. the shunting connector of the double layer continuous oil pipe according to Claims 2 or 3, it is characterized in that, described outflow bypass (6) is two, for the circular arc passage with shunting connector body (10) mating shapes, each outflow bypass (6) lays respectively between two flow channels (9).
5. the shunting connector of double layer continuous oil pipe according to claim 4, is characterized in that, the port of export being positioned at the outflow bypass (6) of the bottom of shunting connector body (10) is formed with extension diameter section (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510249018.XA CN104832110B (en) | 2015-05-15 | 2015-05-15 | The shunting connector of double layer continuous oil pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510249018.XA CN104832110B (en) | 2015-05-15 | 2015-05-15 | The shunting connector of double layer continuous oil pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104832110A true CN104832110A (en) | 2015-08-12 |
| CN104832110B CN104832110B (en) | 2017-03-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510249018.XA Active CN104832110B (en) | 2015-05-15 | 2015-05-15 | The shunting connector of double layer continuous oil pipe |
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| Country | Link |
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| CN (1) | CN104832110B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000087676A (en) * | 1998-09-09 | 2000-03-28 | Koken Boring Mach Co Ltd | Double pipe swivel |
| CN201206437Y (en) * | 2008-04-21 | 2009-03-11 | 毛元红 | Double-layer tubing coupling |
| CN101520119A (en) * | 2009-04-10 | 2009-09-02 | 李恒清 | Concentric double layer oil pipe |
| CN201687408U (en) * | 2009-11-24 | 2010-12-29 | 中国石油集团川庆钻探工程有限公司 | Diversion joint |
| CN203145912U (en) * | 2013-03-25 | 2013-08-21 | 中国石油化工股份有限公司 | Bypassing controller |
| CN203452697U (en) * | 2013-08-26 | 2014-02-26 | 刘海青 | Large-channel well flushing shunt switch |
| CN204627445U (en) * | 2015-05-15 | 2015-09-09 | 中国石油集团渤海钻探工程有限公司 | The shunting connector of double layer continuous oil pipe |
-
2015
- 2015-05-15 CN CN201510249018.XA patent/CN104832110B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000087676A (en) * | 1998-09-09 | 2000-03-28 | Koken Boring Mach Co Ltd | Double pipe swivel |
| CN201206437Y (en) * | 2008-04-21 | 2009-03-11 | 毛元红 | Double-layer tubing coupling |
| CN101520119A (en) * | 2009-04-10 | 2009-09-02 | 李恒清 | Concentric double layer oil pipe |
| CN201687408U (en) * | 2009-11-24 | 2010-12-29 | 中国石油集团川庆钻探工程有限公司 | Diversion joint |
| CN203145912U (en) * | 2013-03-25 | 2013-08-21 | 中国石油化工股份有限公司 | Bypassing controller |
| CN203452697U (en) * | 2013-08-26 | 2014-02-26 | 刘海青 | Large-channel well flushing shunt switch |
| CN204627445U (en) * | 2015-05-15 | 2015-09-09 | 中国石油集团渤海钻探工程有限公司 | The shunting connector of double layer continuous oil pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104832110B (en) | 2017-03-01 |
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Effective date of registration: 20210806 Address after: 100007 No. 9 North Main Street, Dongcheng District, Beijing, Dongzhimen Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Bohai Drilling Engineering Co.,Ltd. Address before: 300457 Tianjin Binhai New Area Development Zone Huanghai Road 106, Bohai Drilling Engineering Co., Ltd. science and Technology Development Office Patentee before: CNPC Bohai Drilling Engineering Co.,Ltd. |
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