CN104948130A - Radial jet bit pressure controller and bit pressure controlling method - Google Patents
Radial jet bit pressure controller and bit pressure controlling method Download PDFInfo
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- CN104948130A CN104948130A CN201510406259.0A CN201510406259A CN104948130A CN 104948130 A CN104948130 A CN 104948130A CN 201510406259 A CN201510406259 A CN 201510406259A CN 104948130 A CN104948130 A CN 104948130A
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- control device
- central tube
- sliding sleeve
- weight control
- drilling bit
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Abstract
The invention discloses a radial jet bit pressure controller which comprises an upper joint (1), a spring (3), a force bearing sleeve (4), a central tube (5), a sliding sleeve (6) and a lower joint (7), wherein the upper joint (1) is fixedly connected to the upper end of the central tube (5), the central tube (5) is arranged in the force bearing sleeve (4), the upper end surface of the force bearing sleeve (4) and the lower end surface of the upper joint (1) are in limit fit, the sliding sleeve (6) is glidingly arranged in the lower section of the force bearing sleeve (4), the lower joint (7) is fixed at the lower end of the sliding sleeve (6), the central tube (5) is sleeved with the spring (3), and two ends of the spring (3) are propped between the force bearing sleeve (4) and the sliding sleeve (6). By means of ballast control by the spring, application of the bit pressure is stable and controllable, the technical problem of difficulty in window cutting operation due to instable bit pressure is solved, and the success rate and efficiency of the radial jet drilling technology are increased. The invention further discloses a bit pressure controlling method.
Description
Technical field
The invention belongs to the technical field of drilling well, be specifically related to a kind of radial jet weight control device on drilling bit and the pressure of the drill control method.
Background technology
Radial jet drilling process technology is the novel technique of a kind of oil formation improvement volume increase of rising in the world recent years.The principle of technique is: the coiled tubing using band nozzle, act on by the hydraulic drilling of high-pressure spray on the different directions in oil reservoir and get out multiple slim-hole, lateral penetration contaminated zone, former well is allowed to increase drainage area, increase earial drainage radius and the area of former well, thus reach the object reducing oil flow resistance, volume increase.In the operation process of this process implementing, by motor grappling oil pipe, motor control the pressure of the drill, while rotary drilling, inner screw advances, and the pressure of the drill acts directly on drill bit, carries out windowing task.But because motor is in down-hole, when windowing, the shake of drill bit and pipe string can affect the control of motor to the pressure of the drill, and ground is difficult to carry out effective control operation to the pressure of the drill, cause being difficult to effectively control the pressure of the drill and stable applying the pressure of the drill, increase the difficulty of windowing task, this process implementing success rate and efficiency are reduced, and easily causes equipment damage and economic loss.
Above-mentioned discussion content object be to reader introduce may to below by the various aspects of technology relevant for the various aspects of the present invention be described and/or advocate, believe that this discussion content contributes to for reader with background's information, to be conducive to understanding various aspects of the present invention better, therefore, should be appreciated that it is discuss to read these with this angle, instead of admit prior art.
Summary of the invention
The object of the invention is to avoid deficiency of the prior art and provide a kind of method that radial jet weight control device on drilling bit and the pressure of the drill control, it effectively can control the pressure of the drill and stable applying the pressure of the drill.
Object of the present invention is achieved through the following technical solutions:
A kind of radial jet weight control device on drilling bit is provided, comprise top connection, spring, load cover, central tube, sliding sleeve, lower contact, described top connection is fixedly connected on the upper end of central tube, described central tube is arranged in load cover, the upper surface of described load cover coordinates with the lower surface of top connection is spacing, described sliding sleeve is slidably disposed on the lower intersegmental part of load cover, described lower contact is fixed on the lower end of sliding sleeve, described spring housing is outside at central tube, and the two ends of spring are pushed up respectively and are arranged between load cover with sliding sleeve.
Wherein, described sliding sleeve epimere is enclosed within the hypomere of central tube slidably, and described sliding sleeve upper end inwall is provided with spacing preiection, and central tube lower end outer wall is provided with the positive stop lug boss coordinated with spacing preiection.
Wherein, the inwall of described load set upper side is provided with step, and the upper end of described spring withstands on step.
Wherein, described load cover, sliding sleeve are provided with circulation port.
Wherein, sealing ring is provided with between described top connection and central tube.
Wherein, lower seal is provided with between described lower contact and sliding sleeve.
Thering is provided a kind of adopts radial jet weight control device on drilling bit as above to carry out the method for the pressure of the drill control, comprises the steps:
S1, weight control device on drilling bit seating nipple is connected to radial jet windows in outer tubing string oil pipe lower going-into-well;
The weight control device on drilling bit of S2, ground composition matching also connects coiled tubing, with coiled tubing, weight control device on drilling bit is sent to weight control device on drilling bit seating nipple limited step position;
S3, press down coiled tubing, load cover is withstood motionless by seating nipple, the downward Compress Spring of central tube, by the drill bit of load transfer to tool string below;
After S4, the pressure of the drill applying action complete, open pump and carry out windowing task.
Beneficial effect of the present invention: when coiled tubing connects under weight control device on drilling bit in seating nipple, press down tubing string, load cover is withstood motionless by top connection, top connection, load cover, central tube compress spring downwards, by the drill bit of the pressure of the drill tool string below lower contact is delivered to.Due to the control having spring to carry out ballast, ensure that the pressure of the drill applies stable, controlled, solve the technical problem that the pressure of the drill shakiness increases windowing task difficulty, improve success rate and the efficiency of radial jet drilling process technology.
Accompanying drawing explanation
The invention will be further described to utilize accompanying drawing, but the embodiment in accompanying drawing does not form any limitation of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, can also obtain other accompanying drawing according to the following drawings.
Fig. 1 is the structural representation of radial jet weight control device on drilling bit.
Detailed description of the invention
Technical scheme of the present invention is understood better in order to make those skilled in the art, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail, it should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine mutually.
Core of the present invention is to provide a kind of radial jet weight control device on drilling bit and the pressure of the drill control method, and it effectively can control the pressure of the drill and stable applying the pressure of the drill.
As shown in Figure 1, radial jet weight control device on drilling bit of the present invention, comprise top connection 1, spring 3, load cover 4, central tube 5, sliding sleeve 6, lower contact 7, described top connection 1 is fixedly connected on the upper end of central tube 5, be provided with sealing ring 2 in multiple tracks between described top connection 1 and central tube 5, sealing ring 2 connects for contacting with pipe and seals the annular space that central tube and load overlap.Described central tube 5 is arranged in load cover 4, the upper surface of described load cover 4 coordinates with the lower surface of top connection 1 is spacing, described sliding sleeve 6 is slidably disposed on load and overlaps 4 times intersegmental parts, described lower contact 7 is fixed on the lower end of sliding sleeve 6, is provided with multiple tracks lower seal 8 between described lower contact 7 and sliding sleeve 6.Described sliding sleeve 6 epimere is enclosed within the hypomere of central tube 5 slidably, described sliding sleeve 6 upper end inwall is provided with spacing preiection 61, central tube 5 lower end outer wall is provided with the positive stop lug boss 51 coordinated with spacing preiection 61, and spacing preiection 61 and positive stop lug boss 51 coordinate and can anti-anti-skid sheath 6, lower contact 7 be separated with central tube 5.It is outside that described spring 3 is enclosed within central tube 5, and the two ends of spring 3 are pushed up respectively and are arranged between load cover 4 and sliding sleeve 6, and wherein, the inwall that described load overlaps 4 upper ends is provided with step 41, and the upper end of described spring 3 withstands on step 41.Described load cover 4, sliding sleeve 6 are provided with 4 circulation ports, and 4 circulation ports are circumferentially uniformly distributed cloth, and circulation port is for being communicated with the annular space of tubing string inside and tubing string and oil pipe.
The application operating process of the present invention in certain inclined shaft radial jet operation is: weight control device on drilling bit seating nipple is connected to radial jet and windows in outer tubing string oil pipe lower going-into-well by (1); (2) ground composition matching weight control device on drilling bit and connect coiled tubing, with coiled tubing, weight control device on drilling bit is sent to weight control device on drilling bit seating nipple limited step position; (3) press down coiled tubing, load cover is withstood motionless by seating nipple, the downward Compress Spring of central tube, by the drill bit of load transfer to tool string below; (4), after the pressure of the drill applying action completes, open pump and carry out windowing task.
Set forth a lot of detail in description above so that fully understand the present invention, but the present invention can also adopt other to be different from other modes described here and implement, and therefore, can not be interpreted as limiting the scope of the invention.
In a word; those skilled in the art although the present invention illustrates above-mentioned preferred embodiment, should illustrate, although can carry out various change and remodeling; unless such change and remodeling deviate from scope of the present invention, otherwise all should be included in protection scope of the present invention.
Claims (7)
1. a radial jet weight control device on drilling bit, it is characterized in that: comprise top connection (1), spring (3), load cover (4), central tube (5), sliding sleeve (6), lower contact (7), described top connection (1) is fixedly connected on the upper end of central tube (5), described central tube (5) is arranged in load cover (4), the upper surface of described load cover (4) coordinates with the lower surface of top connection (1) is spacing, described sliding sleeve (6) is slidably disposed on intersegmental part under load cover (4), described lower contact (7) is fixed on the lower end of sliding sleeve (6), it is outside that described spring (3) is enclosed within central tube (5), and the two ends of spring (3) are pushed up respectively and are arranged between load cover (4) and sliding sleeve (6).
2. radial jet weight control device on drilling bit according to claim 1, it is characterized in that: described sliding sleeve (6) epimere is enclosed within the hypomere of central tube (5) slidably, described sliding sleeve (6) upper end inwall is provided with spacing preiection (61), and central tube (5) lower end outer wall is provided with the positive stop lug boss (51) coordinated with spacing preiection (61).
3. radial jet weight control device on drilling bit according to claim 1, is characterized in that: the inwall of described load cover (4) upper end is provided with step (41), and the upper end of described spring (3) withstands on step (41).
4. radial jet weight control device on drilling bit according to claim 1, is characterized in that: (6) are provided with circulation port for described load cover (4), sliding sleeve.
5. radial jet weight control device on drilling bit according to any one of claim 1 to 4, is characterized in that: be provided with sealing ring (2) between described top connection (1) and central tube (5).
6. radial jet weight control device on drilling bit according to any one of claim 1 to 4, is characterized in that: be provided with lower seal (8) between described lower contact (7) and sliding sleeve (6).
7. adopt the radial jet weight control device on drilling bit according to any one of claim 1 to 6 to carry out a method for the pressure of the drill control, comprise the steps:
S1, weight control device on drilling bit seating nipple is connected to radial jet windows in outer tubing string oil pipe lower going-into-well;
The weight control device on drilling bit of S2, ground composition matching also connects coiled tubing, with coiled tubing, weight control device on drilling bit is sent to weight control device on drilling bit seating nipple limited step position;
S3, press down coiled tubing, load cover is withstood motionless by seating nipple, the downward Compress Spring of central tube, by the drill bit of load transfer to tool string below;
After S4, the pressure of the drill applying action complete, open pump and carry out windowing task.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510406259.0A CN104948130B (en) | 2015-07-10 | 2015-07-10 | The method that the pressure of the drill control is carried out using radial jet weight control device on drilling bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510406259.0A CN104948130B (en) | 2015-07-10 | 2015-07-10 | The method that the pressure of the drill control is carried out using radial jet weight control device on drilling bit |
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| Publication Number | Publication Date |
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| CN104948130A true CN104948130A (en) | 2015-09-30 |
| CN104948130B CN104948130B (en) | 2017-08-25 |
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| CN201510406259.0A Active CN104948130B (en) | 2015-07-10 | 2015-07-10 | The method that the pressure of the drill control is carried out using radial jet weight control device on drilling bit |
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Citations (7)
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| US20100224367A1 (en) * | 2007-10-22 | 2010-09-09 | Charles Brunet | Apparatus and method for milling casing in jet drilling applications for hydrocarbon production |
| CN203626678U (en) * | 2013-11-06 | 2014-06-04 | 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 | Mechanical type axial bit pressure control tool for horizontal well drilling, milling and fishing |
| CN203756093U (en) * | 2014-02-08 | 2014-08-06 | 中国石油化工股份有限公司 | Mechanized-operation constant bit pressure plug-drilling string |
| CN104405321A (en) * | 2014-10-21 | 2015-03-11 | 中国石油天然气集团公司 | Drilling pressure pushing pressurizer |
| CN104594837A (en) * | 2015-01-07 | 2015-05-06 | 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 | Horizontal well drilling pressure control tool |
| CN204663442U (en) * | 2015-04-22 | 2015-09-23 | 中国海洋石油总公司 | A kind of drilling pressure control apparatus for radial jet technique |
| CN204729043U (en) * | 2015-07-10 | 2015-10-28 | 中国海洋石油总公司 | Radial jet weight control device on drilling bit |
-
2015
- 2015-07-10 CN CN201510406259.0A patent/CN104948130B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100224367A1 (en) * | 2007-10-22 | 2010-09-09 | Charles Brunet | Apparatus and method for milling casing in jet drilling applications for hydrocarbon production |
| CN203626678U (en) * | 2013-11-06 | 2014-06-04 | 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 | Mechanical type axial bit pressure control tool for horizontal well drilling, milling and fishing |
| CN203756093U (en) * | 2014-02-08 | 2014-08-06 | 中国石油化工股份有限公司 | Mechanized-operation constant bit pressure plug-drilling string |
| CN104405321A (en) * | 2014-10-21 | 2015-03-11 | 中国石油天然气集团公司 | Drilling pressure pushing pressurizer |
| CN104594837A (en) * | 2015-01-07 | 2015-05-06 | 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 | Horizontal well drilling pressure control tool |
| CN204663442U (en) * | 2015-04-22 | 2015-09-23 | 中国海洋石油总公司 | A kind of drilling pressure control apparatus for radial jet technique |
| CN204729043U (en) * | 2015-07-10 | 2015-10-28 | 中国海洋石油总公司 | Radial jet weight control device on drilling bit |
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| CN104948130B (en) | 2017-08-25 |
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Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: CNOOC (China) Limited Zhanjiang Branch Patentee after: China Offshore Oil Group Co., Ltd. Address before: 100010 China oil tower, 25 Chaoyangmen North Street, Dongcheng District, Beijing Co-patentee before: CNOOC (China) Limited Zhanjiang Branch Patentee before: China National Offshore Oil Corporation |