CN109113722B - Oil field underground depth measuring device and method - Google Patents
Oil field underground depth measuring device and method Download PDFInfo
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- CN109113722B CN109113722B CN201810890218.7A CN201810890218A CN109113722B CN 109113722 B CN109113722 B CN 109113722B CN 201810890218 A CN201810890218 A CN 201810890218A CN 109113722 B CN109113722 B CN 109113722B
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 210000000078 claw Anatomy 0.000 claims abstract description 48
- 238000007789 sealing Methods 0.000 claims abstract description 23
- 230000008878 coupling Effects 0.000 claims abstract description 16
- 238000010168 coupling process Methods 0.000 claims abstract description 16
- 238000005859 coupling reaction Methods 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 238000012360 testing method Methods 0.000 claims description 8
- 230000000670 limiting effect Effects 0.000 claims description 5
- 229920000840 ethylene tetrafluoroethylene copolymer Polymers 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 2
- 238000005259 measurement Methods 0.000 description 10
- 238000010276 construction Methods 0.000 description 9
- 238000009434 installation Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000005488 sandblasting Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/04—Measuring depth or liquid level
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- Environmental & Geological Engineering (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention belongs to the field of oil field downhole operation tools, and particularly relates to an oil field downhole depth measuring method which comprises an upper connector, a piston sleeve, a piston, a central pipe, a spring sheath, a spring, a lower connector and a sealing ball, wherein the upper connector and the lower connector are respectively connected to the upper end and the lower end of the central pipe through threads, the upper end of the piston sleeve is connected to the outer side of the upper connector through threads, the piston is arranged in an annular space between the piston sleeve and the central pipe, a liquid passing hole is formed in the central pipe and corresponds to the piston, after the central pipe is pressurized, high-pressure liquid enters a closed space on the upper side of the piston through the liquid passing hole to further push the piston to move, an elastic hanging claw is arranged at the lower part of the piston sleeve, and a bulge is arranged on the outer side of the lower end of the elastic hanging claw. The invention measures the accurate depth of the related downhole tool by searching the casing coupling, and has the characteristics of simple structure and convenient use.
Description
Technical Field
The invention belongs to the field of oil field downhole operation tools, and particularly relates to an oil field downhole depth measuring device and method.
Background
In the process of oil field downhole operation, the downhole tool is lowered to the designed depth, and due to the influences of factors such as oil pipe measurement error, tightness of oil pipe screw threads, dead weight extension of a pipe column, liquid buoyancy and the like, the depth of the downhole tool is deviated, the deviation value is generally within the range of +/-0.5 m, and the deviation range can meet the operation requirements under most conditions. However, when there is a precise requirement for the depth of the downhole tool, a precise depth correction is required. In the prior art, a method for measuring the depth of a downhole tool through magnetic positioning logging is provided, but the logging cost of the logging method is high, the technical difficulty is high, and the measurement precision is required to be improved.
Disclosure of Invention
The invention provides an oil field underground depth measuring device and method, which aim to solve the problems in the background technology.
The technical problem solved by the invention is realized by adopting the following technical scheme:
the invention provides an oil field underground depth measuring device, which comprises an upper connector, a piston sleeve, a piston, a central tube, a spring sheath, a spring, a lower connector and a sealing ball, wherein the upper connector and the lower connector are respectively connected with the upper end and the lower end of the central tube through threads, the upper end of the piston sleeve is connected with the outer side of the upper connector through threads, the piston is arranged in an annular space between the piston sleeve and the central tube, a liquid passing hole is formed in the central tube and corresponds to the piston, after the central tube is pressurized, high-pressure liquid enters a closed space on the upper side of the piston through the liquid passing hole to push the piston to move, an elastic hanging claw is arranged at the lower part of the piston sleeve, a bulge is arranged on the outer side of the lower end of the elastic hanging claw, a conical surface structure matched with the inner side of the lower end of the elastic hanging claw and the outer side of the lower end of the piston are arranged, when the piston descends, the elastic hanging claw and the bulge on the elastic hanging claw expand outwards under the action of the conical surface structure, the spring sheath and the spring are sleeved on the central tube, wherein the upper end of the spring sheath is abutted against the lower ends of the elastic hanging claw and the piston, the spring is positioned between the spring sheath and the lower joint, a ball seat is arranged on the inner side of the lower joint, and the sealing ball falls on the ball seat;
the conical surface structure on the piston and the conical surface structure on the elastic hanging claw respectively comprise an upper conical surface, a cylindrical surface and a lower conical surface, and the upper conical surface and the lower conical surface are respectively connected with the upper end and the lower end of the cylindrical surface.
The cross section of the bulge is trapezoidal. The sealing ball is made of ethylene-tetrafluoroethylene copolymer.
An oil field downhole depth measuring method comprises the following steps:
step 1, measuring a tubing for going into the well, assembling a tubing string for going into the well, and connecting the device for measuring the depth of the oil field in the well to the tubing string for going into the well.
And 2, lowering the oil field underground depth measuring device below a target coupling, putting a sealing ball, positively pressurizing on the ground according to set pressure, enabling a bulge in the oil field underground depth measuring device to be in close contact with the inner wall of the sleeve, and enabling the cylindrical surface on the piston to coincide with the cylindrical surface on the elastic hanging claw.
And 3, keeping the pressure in the pipe column unchanged, slowly lifting the pipe column, expanding the elastic hanging claw outwards when the protrusion enters a gap at the joint of the sleeve, descending the piston to a new stable position, coinciding an upper conical surface on the piston with a lower conical surface on the elastic hanging claw, and firmly clamping the protrusion in the gap at the joint of the sleeve under the limiting action of a cylindrical surface on the piston.
And 4, continuously lifting the pipe column, and obviously increasing the weight indicator of the operating machine to indicate that the target casing coupling is found. The depth of the casing collar is added or subtracted to the associated tubing and tool length to obtain the exact depth of the particular tool.
And 5, testing a group of couplings above and below the target coupling, and further verifying the correctness of the result according to different lengths of the casings.
And 6, when the testing pressure is reduced to zero, the elastic hanging claw of the oil field underground depth measuring device resets under the action of the elastic force of the elastic hanging claw so as to be used for next measurement.
The invention has the beneficial effects that:
1. the oil field underground depth measuring device is simple in structure and low in manufacturing cost. Once the installation can realize measuring many times, also can clean back installation many times, to the construction that needs to carry out measurement in the pit many times, especially be applicable to, for example: in the hydraulic sand blasting perforation construction, the single well measurement needs several times, even one or twenty times. The cost is 8000- & lt10000 Yuan/time by using the traditional magnetic positioning well logging, and the device and the method can save huge testing cost.
2. The device and the method for measuring the underground depth of the oil field have high positioning precision, and the underground operation can be greatly facilitated through the accurate positioning mode. For example: in the well separate layer water injection process, when each layer of the stratum is smaller than 0.5m, the depth of a packer rubber sleeve needs to be positioned by a well completion pipe column so as to avoid the dislocation of the layer. Under the condition, an oil field underground depth measuring device can be installed in the well completion pipe string so as to accurately position the position of the packer rubber sleeve, and the measuring precision of the method can completely meet the requirement.
3. Various auxiliary equipment used in the method is basic equipment used in well site construction, and other equipment is not required to be prepared or called additionally, so that the measurement can be carried out at any time according to the self construction requirement, and the method does not need to apply for planning and queue for waiting. Or not dividing day and night, working time and non-working time.
4. The invention has simple principle and reliable action, and can be repeatedly used underground without influencing the use effect.
5. The invention can be used in the construction process, and can also be used as a downhole tool to be arranged on a downhole tubular column for long-term use.
Drawings
FIG. 1 is a schematic diagram of the configuration of an oilfield downhole depth measurement device;
FIG. 2 is a schematic view of the piston construction;
FIG. 3 is a view showing the state of engagement between the elastic latch and the piston when the pressure in the center tube is not applied;
FIG. 4 is a view of the engagement of the resilient fingers with the piston when pressurized and with the projection in the joint of the casing.
In the figure: 1-upper joint, 2-piston sleeve, 3-piston, 4-central tube, 5-spring sheath, 6-spring, 7-lower joint, 8-sealing ball, 9-elastic hanging claw, 10-upper conical surface, 11-bulge, 12-liquid passing hole, 13-cylindrical surface, 14-lower conical surface.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
the utility model provides an oil field is degree of depth measuring device in pit, includes top connection 1, piston bush 2, piston 3, center tube 4, spring sheath 5, spring 6, lower clutch 7 and ball sealer 8, top connection 1 and lower clutch 7 are respectively through threaded connection at the upper and lower both ends of center tube 4, the upper end of piston bush 2 pass through threaded connection in the outside of top connection 1, piston 3 set up in the annular space between piston bush 2 and center tube 4.
The central tube 4 is provided with a liquid passing hole 12 corresponding to the piston 3, and after the central tube 4 is pressurized, high-pressure liquid enters the closed space on the upper side of the piston 3 through the liquid passing hole 12, so that the piston 3 is pushed to move.
The lower part of the piston sleeve 2 is provided with an elastic hanging claw 9, the outer side of the lower end of the elastic hanging claw 9 is provided with a bulge 11, the inner side of the lower end of the elastic hanging claw 9 and the outer side of the lower end of the piston 3 are provided with mutually matched conical surface structures, and when the piston 3 moves downwards, the elastic hanging claw 9 and the bulge 11 thereon expand outwards under the action of the conical surface structures. Spring sheath 5 and spring 6 all suit on center tube 4, wherein, the upper end of spring sheath 5 supports the lower extreme at elasticity string claw 9 and piston 3, spring 6 is located between spring sheath 5 and lower clutch 7, the inboard of lower clutch 7 be provided with the ball seat, sealing ball 8 on the ball seat.
The conical surface structure on the piston 3 and the conical surface structure on the elastic hanging claw 9 both comprise an upper conical surface 10, a cylindrical surface 13 and a lower conical surface 14, and the upper conical surface 10 and the lower conical surface 14 are respectively connected with the upper end and the lower end of the cylindrical surface 13.
When the pressure-bearing piston is used, positive pressure is carried out on the ground according to set pressure, the bulge 11 is tightly contacted with the inner wall of the sleeve and keeps the outward expansion movement trend, and at the moment, the cylindrical surface 13 on the piston 3 is overlapped with the cylindrical surface 13 on the elastic hanging claw 9. Keeping the pressure in the pipe column unchanged, slowly lifting the pipe column, when the bulge 11 enters a gap at the joint of the casing pipes, the elastic hanging claws 9 expand outwards, the piston 3 descends to a new stable position, and when the piston is at the new stable position, the upper conical surfaces 10 on the piston 3 are overlapped with the lower conical surfaces 14 on the elastic hanging claws 9.
Under the limiting action of the cylindrical surface 13 on the piston 3, the protrusion 11 is firmly clamped in the gap at the sleeve joint and cannot slide out of the gap at the sleeve joint under the action of radial force. The effect of the limiting action of the cylindrical surface 13 is as follows: the inner wall of the casing may be partially broken due to various reasons, and when the protrusion 11 slides to the broken place, the weight indicator of the working machine may fluctuate, and at this time, the technician may misunderstand that the casing coupling has been found. After the cylindrical surface 13 is arranged, when the bulge 11 slides to the damaged position of the sleeve, the inner side of the elastic hanging claw 9 is only supported by the lower conical surface 14 on the piston 3, although the pointer of the weight indicator fluctuates, the piston 3 is forced to move upwards after the pipe column is continuously lifted, and the pointer of the weight indicator keeps stable. When the bulge 11 slides to the joint of the sleeve, enough space is provided around the bulge for the elastic hanging claw 9 to expand, after the elastic hanging claw 9 expands, the piston 3 further descends until the cylindrical surface 13 on the piston 3 is supported on the inner side of the bulge 11, and the inner side of the elastic hanging claw 9 is reliably supported by the cylindrical surface 13 and cannot return, so that the bulge 11 is firmly clamped in the gap at the joint of the sleeve and cannot slide out from the gap at the joint of the sleeve under the action of radial force. At this time, the pipe column is lifted up continuously, and the number of the weight indicator changes obviously.
The sealing ball 8 is made of ethylene-tetrafluoroethylene copolymer, the ethylene-tetrafluoroethylene copolymer is an organic high polymer material with high mechanical strength and good sealing performance, the sealing ball 8 made of the material can ensure the sealing performance of the sealing ball 8, and the sealing ball 8 can be discharged back when the sealing ball is not required to be pressed and positioned, so that the interior of a tubular column is kept smooth, and other procedures are facilitated.
The cross section of the bulge 11 is trapezoidal, when the bulge enters the gap of the sleeve, the center of the bulge 11 can be coincided with the center of the gap, and therefore the positioning precision is further improved (the positioning precision can be accurate to within 2mm and is far higher than that of the prior art).
The invention has simple principle and reliable action, and can be repeatedly used underground without influencing the use effect. Meanwhile, the invention can be used in the construction process, and can also be used as a downhole tool to be arranged on a downhole tubular column for long-term use without influencing the normal production.
The working principle of the oil field underground depth measuring device is as follows:
after the two sleeves are connected by the sleeve coupling and screwed, a gap of 4mm is formed between the ends of the two sleeves. One slot corresponds to one casing collar, and there are as many collars as there are downhole. The design is used for finding the gap in the well, so that the positioning of the downhole tool connected to the pipe column is realized. The using process of the invention is as follows:
step 1, measuring a tubing for going into the well, assembling a tubing string for going into the well, and connecting the device for measuring the depth of the oil field in the well to the tubing string for going into the well.
And 2, lowering the oil field underground depth measuring device below a target coupling, putting a sealing ball 8, positively pressurizing on the ground according to set pressure, enabling the bulge 11 to be in close contact with the inner wall of the sleeve and keeping the outward bulging movement trend, and enabling the cylindrical surface 13 on the piston 3 to coincide with the cylindrical surface 13 on the elastic hanging claw 9.
And 3, keeping the pressure in the pipe column unchanged, slowly lifting the pipe column, when the protrusion 11 enters a gap at the joint of the sleeve, expanding the elastic hanging claw 9 outwards, descending the piston 3 to a new stable position, and when the piston is at the new stable position, overlapping the upper conical surface 10 on the piston 3 with the lower conical surface 14 on the elastic hanging claw 9, and firmly clamping the protrusion 11 in the gap at the joint of the sleeve under the limiting action of the cylindrical surface 13 on the piston 3 without sliding out from the gap at the joint of the sleeve under the action of radial force.
And 4, continuously lifting the pipe column, and obviously increasing the weight indicator of the operating machine to indicate that the target casing coupling is found. The depth of the casing collar is added or subtracted to the associated tubing and tool length to obtain the exact depth of the particular tool.
And 5, testing a group of couplings above and below the target coupling, and further verifying the correctness of the result according to different lengths of the casings.
And 6, when the testing pressure is reduced to zero, the elastic hanging claw 9 of the oil field underground depth measuring device resets under the action of the elastic force of the elastic hanging claw 9 so as to be used for next measurement.
The oil field underground depth measuring device is simple in structure and low in manufacturing cost. Once the installation can realize measuring many times, also can clean back installation many times, to the construction that needs to carry out measurement in the pit many times, especially be applicable to, for example: in the hydraulic sand blasting perforation construction, the single well measurement needs several times, even one or twenty times. The cost is 8000- & lt10000 Yuan/time by using the traditional magnetic positioning well logging, and the device and the method can save huge testing cost. In addition, the device and the method for measuring the underground depth of the oil field have high positioning precision, and the underground operation can be greatly facilitated through the accurate positioning mode. For example: in the well separate layer water injection process, when each layer of the stratum is smaller than 0.5m, the depth of a packer rubber sleeve needs to be positioned by a well completion pipe column so as to avoid the dislocation of the layer. Under the condition, an oil field underground depth measuring device can be installed in the well completion pipe string so as to accurately position the position of the packer rubber sleeve, and the measuring precision of the method can completely meet the requirement.
Claims (3)
1. The utility model provides an oil field is degree of depth measuring device in pit which characterized in that: comprises an upper joint (1), a piston sleeve (2), a piston (3), a central tube (4), a spring sheath (5), a spring (6), a lower joint (7) and a sealing ball (8), wherein the upper joint (1) and the lower joint (7) are respectively connected with the upper end and the lower end of the central tube (4) through threads, the upper end of the piston sleeve (2) is connected with the outer side of the upper joint (1) through threads, the piston (3) is arranged in an annular space between the piston sleeve (2) and the central tube (4), a liquid passing hole (12) is arranged on the central tube (4) corresponding to the piston (3), after the piston (4) is pressurized, high-pressure liquid enters a closed space at the upper side of the piston (3) through the liquid passing hole (12) to push the piston (3) to move, an elastic hanging claw (9) is arranged at the lower part of the piston sleeve (2), and a bulge (11) is arranged at the outer side of the lower end of the elastic hanging claw (9), the inner side of the lower end of the elastic hanging claw (9) and the outer side of the lower end of the piston (3) are provided with conical surface structures which are matched with each other, when the piston (3) moves downwards, the elastic hanging claw (9) and a bulge (11) on the elastic hanging claw expand outwards under the action of the conical surface structures, the spring sheath (5) and the spring (6) are sleeved on the central tube (4), wherein the upper end of the spring sheath (5) abuts against the lower ends of the elastic hanging claw (9) and the piston (3), the spring (6) is located between the spring sheath (5) and the lower joint (7), the inner side of the lower joint (7) is provided with a ball seat, and the sealing ball (8) falls on the ball seat;
the conical surface structure on the piston (3) and the conical surface structure on the elastic hanging claw (9) both comprise an upper conical surface (10), a cylindrical surface (13) and a lower conical surface (14), and the upper conical surface (10) and the lower conical surface (14) are respectively connected to the upper end and the lower end of the cylindrical surface (13); when the bulge (11) slides to the damaged position of the sleeve, the inner side of the elastic hanging claw (9) is only supported by the lower conical surface (14) on the piston (3), although the pointer of the weight indicator can fluctuate, the piston (3) can be forced to move upwards after the pipe column is continuously lifted, and the pointer of the weight indicator can recover stably; when the bulge (11) slides to the joint of the sleeve, enough space is reserved around the bulge for the elastic hanging claw (9) to expand, and after the elastic hanging claw (9) expands, the piston (3) further descends until the cylindrical surface (13) on the piston (3) is supported on the inner side of the bulge (11), so that the bulge (11) can be firmly clamped in the gap at the joint of the sleeve and cannot slide out of the gap at the joint of the sleeve under the action of radial force;
the cross section of the bulge (11) is trapezoidal, and when the bulge (11) enters the gap of the sleeve, the center of the bulge (11) can be coincided with the center of the gap, so that the positioning accuracy is further improved.
2. The oilfield downhole depth measuring device of claim 1, wherein: the sealing ball (8) is made of ethylene-tetrafluoroethylene copolymer, and the sealing ball (8) made of the material can ensure the sealing performance of the sealing ball (8) and can be discharged back when the sealing ball (8) is not required to be pressed for positioning, so that the interior of a tubular column is kept smooth, and other procedures are facilitated.
3. A method of measuring a downhole depth in an oil field using the apparatus of any one of claims 1-2, comprising the steps of:
step 1, measuring a downhole oil pipe, assembling a downhole pipe column, and connecting the downhole depth measuring device of the oil field to the pipe column for downhole;
step 2, the oil field underground depth measuring device is lowered to the position below a target coupling, a sealing ball (8) is put in, positive pressurization is carried out on the ground according to set pressure, a bulge (11) in the oil field underground depth measuring device is tightly contacted with the inner wall of a sleeve, and at the moment, a cylindrical surface (13) on a piston (3) is overlapped with a cylindrical surface (13) on an elastic hanging claw (9);
step 3, keeping the pressure in the pipe column unchanged, slowly lifting the pipe column, when the bulge (11) enters a gap at the joint of the sleeve, expanding the elastic hanging claw (9) outwards, descending the piston (3) to a new stable position, at the moment, overlapping an upper conical surface (10) on the piston (3) with a lower conical surface (14) on the elastic hanging claw (9), and firmly clamping the bulge (11) in the gap at the joint of the sleeve under the limiting action of a cylindrical surface (13) on the piston (3);
step 4, continuing to lift the pipe column, obviously increasing the weight indicator of the operating machine to indicate that the target casing coupling is found, and adding or subtracting the lengths of the related oil pipe and the tool by the depth of the casing coupling to obtain the accurate depth of the specific tool;
step 5, testing a group of couplings above and below the target coupling, and further verifying the correctness of the result according to the difference of the lengths of the casings;
and 6, when the testing pressure is reduced to zero, the elastic hanging claw (9) of the oil field underground depth measuring device resets under the action of the elastic force of the elastic hanging claw to be measured next time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810890218.7A CN109113722B (en) | 2018-08-07 | 2018-08-07 | Oil field underground depth measuring device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810890218.7A CN109113722B (en) | 2018-08-07 | 2018-08-07 | Oil field underground depth measuring device and method |
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| CN109113722A CN109113722A (en) | 2019-01-01 |
| CN109113722B true CN109113722B (en) | 2022-02-25 |
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| CN201810890218.7A Active CN109113722B (en) | 2018-08-07 | 2018-08-07 | Oil field underground depth measuring device and method |
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| CN111946328B (en) * | 2020-09-15 | 2024-08-09 | 中交第二公路勘察设计研究院有限公司 | Spring type protection device for test instrument in horizontal directional drilling geological investigation hole |
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| CN202745839U (en) * | 2012-07-26 | 2013-02-20 | 中国石油天然气股份有限公司 | Coupling positioner |
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| WO2018125083A1 (en) * | 2016-12-28 | 2018-07-05 | Halliburton Energy Services, Inc. | Downhole location indication system |
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2018
- 2018-08-07 CN CN201810890218.7A patent/CN109113722B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1818325A (en) * | 2006-03-01 | 2006-08-16 | 潘昌德 | Steam-propelling packer |
| CN201513169U (en) * | 2009-08-14 | 2010-06-23 | 中国石油化工股份有限公司胜利油田分公司采油工艺研究院 | Depth measuring device for fine blocking and sealing pipe column |
| CN101899954A (en) * | 2010-08-17 | 2010-12-01 | 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 | Depth positioner of well-entry tool and positioning method |
| CN202745839U (en) * | 2012-07-26 | 2013-02-20 | 中国石油天然气股份有限公司 | Coupling positioner |
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