CN105178872A - Mechanical auxiliary device used for improving bit pressure - Google Patents
Mechanical auxiliary device used for improving bit pressure Download PDFInfo
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- CN105178872A CN105178872A CN201510567490.8A CN201510567490A CN105178872A CN 105178872 A CN105178872 A CN 105178872A CN 201510567490 A CN201510567490 A CN 201510567490A CN 105178872 A CN105178872 A CN 105178872A
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- central tube
- hydrophthalmia
- pressure
- improving
- assist
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Abstract
The invention relates to a mechanical auxiliary device used for improving bit pressure, and belongs to the technical field of oil and gas well drilling tools. The mechanical auxiliary device is composed of a central tube and spiral edge blocks, wherein a plurality of water holes are spirally formed in the periphery of the central tube between outer threads and inner threads; the plurality of spiral blocks are spirally arranged on the periphery of the central tube among the water holes; and liquid flow slots are axially and uniformly distributed in the periphery of the central tube among the spiral edge blocks. The mechanical auxiliary device solves the problem that rock-breaking efficiency and mechanical drilling speed of a drill bit are affected by great horizontal-section drilling friction resistance and hindered drilling pressure transmission, and is especially suitable for horizontal-section drilling of an oil and gas horizontal well during mounting and use.
Description
Technical field
The present invention relates to a kind of assist for improving the pressure of the drill, belonging to Oil/gas Well drill and petroleum extraction tools technical field.
Background technology
In recent years, along with deepening continuously of petroleum natural gas exploration work, unconventional gas reservoir level is increasing.In horizontal segment drilling process, because drilling tool " is lain " on the lower borehole wall, there is larger frictional resistance, cause load transfer to be obstructed, directly affects drill bit efficiency of breaking rock and rate of penetration.Drilling practice proves, because frictional resistance problem causes the difficult major technology bottleneck having become restriction unconventional gas reservoir Efficient Development that pressurizes in current horizontal segment drilling process.
Summary of the invention
The object of the invention is to: provide that a kind of structure is simple, practicality good, the mode by rotating in the course of work carries out mechanical assistance pressurization, thus increases the pressure of the drill, improves efficiency of breaking rock and rate of penetration; Solve load transfer in existing level section drilling process to be obstructed the assist for improving the pressure of the drill of problem.
Technical scheme of the present invention is:
For improving the assist of the pressure of the drill, it is made up of central tube and scroll block, and one end port outer wall of central tube is provided with external screw thread, and the other end port inner wall of central tube is provided with internal thread; It is characterized in that: the central tube between external screw thread and internal thread circumferentially helical form is provided with multiple hydrophthalmia; Central tube between hydrophthalmia circumferentially helical form is provided with multiple scroll block; Central tube between scroll block is circumferentially axially evenly equipped with spout.
Described scroll block cross section is tapered, and the head clearance shape of scroll block has been welded carbide cutter tool.
Described spout and hydrophthalmia quantity are respectively 4.
Described hydrophthalmia is horn-like, and the osculum port footpath of hydrophthalmia is 4mm, and the big opening end bore of hydrophthalmia is 6mm.
Described scroll block axial distance is each other 41.5mm.
The present invention compared with prior art has following beneficial effect:
1, scroll block has been welded non-isosceles triangle carbide cutter tool, is convenient to rock of borehole under scroll block wedging, avoids producing slip phenomenon in rotary course, and contribute to preventing scroll block from wearing and tearing.
2, central tube surface is evenly equipped with four spouts, is convenient to landwaste in drilling process and returns row.
3, central tube surface is evenly equipped with four hydrophthalmias, and to prevent spout by landwaste or borehole wall soil plug, and hydrophthalmia is from inside to outside in horn-like, prevents the formation jet impulse borehole wall from causing and collapses.
4, the present invention is simple and practical, and reliability is high.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is sectional structure schematic diagram of the present invention;
Fig. 3 is the left TV structure schematic diagram of Fig. 1;
Fig. 4 be Figure 1A-A to structural representation.
In figure; 1. external screw thread, 2. carbide cutter tool, 3. scroll block, 4. spout, 5. hydrophthalmia, 6. internal thread, 7, central tube.
Detailed description of the invention
This assist being used for improving the pressure of the drill is made up of central tube 7 and scroll block 3, one end port outer wall of central tube 7 is provided with external screw thread 1, the other end port inner wall of central tube 7 is provided with internal thread 6.Central tube 7 between external screw thread 1 and internal thread 6 circumferentially helical form is provided with 4 hydrophthalmias 5; Hydrophthalmia 5 is from inside to outside in horn-like, and the osculum port footpath of hydrophthalmia is 4mm, and the big opening end bore of hydrophthalmia is 6mm, and this structure can prevent jet.The object of hydrophthalmia 5 is to prevent spout by landwaste or borehole wall soil plug.
Central tube 7 between hydrophthalmia 5 circumferentially helical form is provided with multiple scroll block 3; Scroll block 3 cross section is tapered.The head clearance shape of scroll block 3 has been welded carbide cutter tool 2.Central tube 7 between scroll block 3 is circumferentially axially evenly equipped with 4 spouts 4; For the row of returning of landwaste in drilling process.
During operation, this assist is arranged in horizontal segment drill string, and interval can be needed to install according to construction multiple, upper end internal thread 6 is connected with drill string respectively with lower end external screw thread 1, goes into the well with drill string.After drill string is lowered into precalculated position, this assist " is lain " under horizontal segment on the borehole wall, now the scroll block 3 of this auxiliary pressure device and carbide cutter tool 2 rock of borehole under wedging under drill string Gravitative Loads; When operation is crept in startup, this auxiliary pressure device makes clockwise rotation with drill string.At scroll block 3 and carbide cutter tool 2 wedging rock, engage each other in the process rotated with rock, rock is to instrument generation thrust forward afterwards for tooth (scroll block 3), and this thrust is delivered to drill bit place, can reach the object increasing the pressure of the drill.
Scroll block 3 circumferentially the distributing in the shape of a spiral at central tube 7 of this assist, direction of rotation is dextrorotation, and the axial distance between adjacent two scrolls is 41.5mm, and the angle on scroll block 3 between any point tangent line and tool axis is 80 °.The non-isosceles triangle carbide cutter tool 2 that scroll block 3 is welded can be convenient to scroll block 3 and eat (embedding) and enter lower rock of borehole, and avoids producing slip phenomenon in rotary course, contributes to preventing scroll block 3 from wearing and tearing simultaneously.This assist structure is simple, practicality good, solves that horizontal segment drilling well frictional resistance is large, load transfer is obstructed, thus affects the problem of drill bit efficiency of breaking rock and rate of penetration, and the horizontal segment drilling well being specially adapted to petroleum gas horizontal well is installed and used.
Claims (5)
1. one kind for improving the assist of the pressure of the drill, it is made up of central tube (7) and scroll block (3), one end port outer wall of central tube (7) is provided with external screw thread (1), the other end port inner wall of central tube (7) is provided with internal thread (6); It is characterized in that: the central tube (7) between external screw thread (1) and internal thread (6) circumferentially helical form is provided with multiple hydrophthalmia (5); Central tube (7) between hydrophthalmia (5) circumferentially helical form is provided with multiple scroll block (3); Central tube (7) between scroll block (3) is circumferentially axially evenly equipped with spout (4).
2. a kind of assist for improving the pressure of the drill according to claim 1, is characterized in that: described scroll block (3) cross section is tapered, and the head clearance shape of scroll block (3) has been welded carbide cutter tool (2).
3. a kind of assist for improving the pressure of the drill according to claim 1, is characterized in that: described spout (4) and hydrophthalmia (5) quantity are respectively 4.
4. a kind of assist for improving the pressure of the drill according to claim 1, is characterized in that: described hydrophthalmia (5) is for horn-like, and the osculum port footpath of hydrophthalmia (5) is 4mm, and the big opening end bore of hydrophthalmia (5) is 6mm.
5. a kind of assist for improving the pressure of the drill according to claim 1, is characterized in that: described scroll block (3) axial distance is each other 41.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510567490.8A CN105178872A (en) | 2015-09-09 | 2015-09-09 | Mechanical auxiliary device used for improving bit pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510567490.8A CN105178872A (en) | 2015-09-09 | 2015-09-09 | Mechanical auxiliary device used for improving bit pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105178872A true CN105178872A (en) | 2015-12-23 |
Family
ID=54901230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510567490.8A Pending CN105178872A (en) | 2015-09-09 | 2015-09-09 | Mechanical auxiliary device used for improving bit pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105178872A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201176854Y (en) * | 2008-04-08 | 2009-01-07 | 四川省什邡市兴达石油设备有限公司 | Boring tool stabilizers |
| CN202338204U (en) * | 2011-10-21 | 2012-07-18 | 安徽水利开发股份有限公司 | Directional spiral bit special for gravel soil |
| CN102943628A (en) * | 2012-11-15 | 2013-02-27 | 西南石油大学 | Double-layered casing windowing drillbit |
| CN203531785U (en) * | 2013-10-21 | 2014-04-09 | 成都利特能源技术有限公司 | Centralizer using liquid to assist in cleaning cuttings bed |
| CN204266945U (en) * | 2014-11-21 | 2015-04-15 | 西南石油大学 | A kind of drilling tool stabilizer with righting structure |
| CN204920789U (en) * | 2015-09-09 | 2015-12-30 | 长江大学 | A mechanical assistance mean for improving weight on bit |
-
2015
- 2015-09-09 CN CN201510567490.8A patent/CN105178872A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201176854Y (en) * | 2008-04-08 | 2009-01-07 | 四川省什邡市兴达石油设备有限公司 | Boring tool stabilizers |
| CN202338204U (en) * | 2011-10-21 | 2012-07-18 | 安徽水利开发股份有限公司 | Directional spiral bit special for gravel soil |
| CN102943628A (en) * | 2012-11-15 | 2013-02-27 | 西南石油大学 | Double-layered casing windowing drillbit |
| CN203531785U (en) * | 2013-10-21 | 2014-04-09 | 成都利特能源技术有限公司 | Centralizer using liquid to assist in cleaning cuttings bed |
| CN204266945U (en) * | 2014-11-21 | 2015-04-15 | 西南石油大学 | A kind of drilling tool stabilizer with righting structure |
| CN204920789U (en) * | 2015-09-09 | 2015-12-30 | 长江大学 | A mechanical assistance mean for improving weight on bit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151223 |