CN104295287A - Deep well and high-temperature well secondary gyroscope seat key orientation process - Google Patents
Deep well and high-temperature well secondary gyroscope seat key orientation process Download PDFInfo
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- CN104295287A CN104295287A CN201410393440.8A CN201410393440A CN104295287A CN 104295287 A CN104295287 A CN 104295287A CN 201410393440 A CN201410393440 A CN 201410393440A CN 104295287 A CN104295287 A CN 104295287A
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- whipstock
- well
- temperature
- landing nipple
- orientation
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- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/02—Determining slope or direction
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Geophysics (AREA)
- Environmental & Geological Engineering (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Gyroscopes (AREA)
Abstract
The invention relates to the technical field of deep well and high-temperature well horizontal well casing window sidetracking gyroscope orientation, in particular to a deep well and high-temperature well secondary gyroscope seat key orientation process. The process includes the steps that firstly, a whipstock enters a well downwards and is then connected with a positioning connector I, the angle difference between the whipstock and the positioning connector I is measured, and in other words, the angle difference between the inclined face of the whipstock and a positioning key of the positioning connector I is measured; secondly, when the positioning connector I is descended to the depth where the well temperature of the stratum with the positioning connector I is lower than the rated working temperature of a gyro inclinometer, the gyro inclinometer and the positioning connector I are descended through a cable to conduct seat key confirming, and then the true orientation of the whipstock can be measured. By means of the deep well and high-temperature well secondary gyroscope seat key orientation process, gyroscope orientation can be smoothly conducted in deep wells and high-temperature wells, the application range of an existing gyro inclinometer is widened, the on-site operation is simple, and the construction cost is reduced. The defect that the gyroscope orientation can not be conducted in existing deep wells or existing high-temperature wells is overcome.
Description
Technical field:
The present invention relates to a kind of deep-well, high temperature well sidetrack horizontal well casing sidetracking Technology Determining Azimuth with Gyro field, particularly a kind of Temperature Deep well gyro secondary sits key directional process.
Background technology:
Sidetrack horizontal well technology refers to uses former casing, controls drilling well creep into horizontal direction by window sidetracking.Its objective is because horizontal well has special casing programme, hundreds of rice horizontal segment extends in oil reservoir, increase the exchange area of pit shaft and oil reservoir, change the flow regime of liquid to Wellbore Flow, thus can produce the exploitation effect more superior than peupendicular hole in the ordinary course of things.Usual sidetrack horizontal well is windowed and is a little all selected between 800m ~ 8000m, calculates by downhole temperature gradient 3.5 DEG C/100m, and bottom hole temperature (BHT) scope is all between 280 DEG C ~ 2450 DEG C.
Gyrolevel is a kind of inclination measurement system not being subject to geology and surrounding environment influence just grown up at the nineties initial stage, this instrument can go out orientation to be windowed in down-hole by gyro to measure, like this can in Jiu Jing, old down-hole by actual oil reservoir direction window sidetracking, Jiu Jing, Lao Jing is made to obtain secondary development, not only save spending, and greatly save manpower and materials.But the gyrolevel of existing use, the resistance to temperature difference, is suitable only for low temperature shallow well, is not suitable for high temperature deep well.
Summary of the invention:
The technical problem to be solved in the present invention is to provide a kind of Temperature Deep well gyro secondary and sits key directional process, this technique achieves Temperature Deep well can carry out gyrocompassing smoothly, widened the scope of application of existing gyrolevel, execute-in-place is simple, reduces construction cost.Overcome the deficiency that existing Temperature Deep well can not carry out gyrocompassing.
The technical solution used in the present invention is: a kind of Temperature Deep well gyro secondary sits key directional process, and this processing step is as follows:
One, landing nipple I is connect after whipstock G.I.H, the differential seat angle between the positioning key measuring angular difference between whipstock and landing nipple I and whipstock inclined-plane and landing nipple I;
When two, first descending landing nipple I to place subterranean wells temperature to be less than the degree of depth of gyrolevel operating temperature ratings, transfer gyrolevel and landing nipple I by cable and carry out a key and confirm, the true bearing of whipstock can be measured;
Three, gyrolevel is tripped out, the well head place drilling tool of landing nipple I upper end is connected orientation joint II, and the true north azimuth measuring orientation joint II is poor, the angular difference between whipstock and orientation joint II can be drawn by the measured direction conversion of landing nipple I;
Four, lower boring is continued, under be drilled into object well depth, transfer gyrolevel and landing nipple II by cable and carry out a key and confirm, the true bearing of whipstock can be measured, now, residing for landing nipple II, the subterranean wells temperature of well depth is less than gyrolevel operating temperature ratings; The true bearing of whipstock as with different design, rotatable well head rotating disk, goes to designing requirement by drilling tool by the orientation of whipstock.
The invention has the beneficial effects as follows: present invention achieves Temperature Deep well can carry out gyrocompassing smoothly, widened the scope of application of existing gyrolevel, execute-in-place is simple, reduces construction cost.
Accompanying drawing illustrates:
Below in conjunction with the drawings and specific embodiments, the present invention will be further described in detail.
Fig. 1 is schematic diagram of the present invention.
Detailed description of the invention:
As shown in Figure 1, a kind of Temperature Deep well gyro secondary sits key directional process, and this processing step is as follows:
One, landing nipple I 2 is connect after whipstock 1 G.I.H, the differential seat angle between the positioning key measuring angular difference between whipstock 1 and landing nipple I 2 and whipstock 1 inclined-plane and landing nipple I 2;
When two, first descending landing nipple I 2 to place subterranean wells temperature to be less than the degree of depth of gyrolevel 4 operating temperature ratings, transfer gyrolevel 4 by cable and carry out a key with landing nipple I 2 and confirm, the true bearing of whipstock 1 can be measured;
Three, gyrolevel 4 is tripped out, the well head place drilling tool of landing nipple I 2 upper end is connected orientation joint II 3, and the true north azimuth measuring orientation joint II 3 is poor, the angular difference between whipstock 1 and orientation joint II 3 can be drawn by the measured direction conversion of landing nipple I 2;
Four, lower boring is continued, under be drilled into object well depth, transfer gyrolevel 4 by cable and carry out a key with landing nipple II 3 and confirm, the true bearing of whipstock 1 can be measured, now, residing for landing nipple II 3, the subterranean wells temperature of well depth is less than gyrolevel 4 operating temperature ratings; The true bearing of whipstock 1 as with different design, rotatable well head rotating disk, goes to designing requirement by drilling tool by the orientation of whipstock 1.
Be understandable that, above about specific descriptions of the present invention, the technical scheme described by the embodiment of the present invention is only not limited to for illustration of the present invention, those of ordinary skill in the art is to be understood that, still can modify to the present invention or equivalent replacement, to reach identical technique effect; Needs are used, all within protection scope of the present invention as long as meet.
Claims (1)
1. Temperature Deep well gyro secondary sits a key directional process, it is characterized in that: this processing step is as follows:
One, landing nipple I (2) is connect after whipstock (1) G.I.H, the differential seat angle between the positioning key measuring angular difference between whipstock (1) and landing nipple I (2) and whipstock (1) inclined-plane and landing nipple I (2);
When two, first descending landing nipple I (2) to place subterranean wells temperature to be less than the degree of depth of gyrolevel (4) operating temperature ratings, transfer gyrolevel (4) and landing nipple I (2) by cable to carry out a key and confirm, the true bearing of whipstock (1) can be measured;
Three, gyrolevel (4) is tripped out, the well head place drilling tool of landing nipple I (2) upper end is connected orientation joint II (3), and the true north azimuth measuring orientation joint II (3) is poor, the angular difference between whipstock (1) and orientation joint II (3) can be drawn by the measured direction conversion of landing nipple I (2);
Four, lower boring is continued, under be drilled into object well depth, transfer gyrolevel (4) and landing nipple II (3) by cable to carry out a key and confirm, the true bearing of whipstock (1) can be measured, now, the subterranean wells temperature of the residing well depth of landing nipple II (3) is less than gyrolevel (4) operating temperature ratings; The true bearing of whipstock (1) as with different design, rotatable well head rotating disk, goes to designing requirement by drilling tool by the orientation of whipstock (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410393440.8A CN104295287B (en) | 2014-08-12 | A kind of Temperature Deep well gyro secondary sits key directional process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410393440.8A CN104295287B (en) | 2014-08-12 | A kind of Temperature Deep well gyro secondary sits key directional process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104295287A true CN104295287A (en) | 2015-01-21 |
| CN104295287B CN104295287B (en) | 2016-11-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105443063A (en) * | 2015-11-26 | 2016-03-30 | 中国石油集团长城钻探工程有限公司 | Multilateral well angular difference adjustment tool and angular difference adjustment method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105443063A (en) * | 2015-11-26 | 2016-03-30 | 中国石油集团长城钻探工程有限公司 | Multilateral well angular difference adjustment tool and angular difference adjustment method thereof |
| CN105443063B (en) * | 2015-11-26 | 2018-01-19 | 中国石油集团长城钻探工程有限公司 | A kind of Multilateral Wells angular difference adjustment instrument and its angular difference method of adjustment |
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Effective date of registration: 20201009 Address after: 100120 Beijing Xicheng District six laying Kang Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: China National Petroleum Corporation Great Wall Drilling Engineering Co.,Ltd. Address before: 124010 Xinglongtai, Liaoning Province, oil street, No. 96, No. Patentee before: China National Petroleum Corporation Great Wall Drilling Engineering Co.,Ltd. |
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