CN201125687Y - Split stream short node for gas drilling - Google Patents
Split stream short node for gas drilling Download PDFInfo
- Publication number
- CN201125687Y CN201125687Y CNU2007203123935U CN200720312393U CN201125687Y CN 201125687 Y CN201125687 Y CN 201125687Y CN U2007203123935 U CNU2007203123935 U CN U2007203123935U CN 200720312393 U CN200720312393 U CN 200720312393U CN 201125687 Y CN201125687 Y CN 201125687Y
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- main body
- core tube
- tool main
- drilling
- internal
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Abstract
The utility model relates to a shunt short section used in gas well drilling in petroleum well drilling field, which mainly comprises a tool main body (1), by-pass holes (2), and an internal shunt core tube (3), wherein, the upper end of the tool main body (1) is provided with an internal thread, a shallow groove is arranged at position near an external thread on the lower end of the tool main body (1), the by-pass holes (2) which inclines upward is uniformly distributed around the middle part of the tool main body (1), an internal stage is arranged at a position with a certain distance away form the by-pass holes (2), and an internal thread is arranged adjacent to the surface of the stage; the outer surface of the internal shunt core tube (3) is processed with a plurality of streamlined grooves, whose lower end has an external thread which is connected with the internal thread of the tool main body (1) adjacent to the surface of the stage; a sealing ring (4) seals the part between the bottom end of the internal shunt core tube (3) and the tool main body (1). When the shunt short section is connected on the position where the drilling column changes the diameter, excessive gas injected in the drilling column are directly shunted at the position where the drilling column changes the diameter and not passing through the drill hydrophthalmos and part of the gas enters an annulus, the annulus pressure at the bottom of a well is reduced, the pressure of the annulus at the position where the drilling column changes the diameter is increased, and the filings efficiency is improved.
Description
Technical field
The utility model relates to the oil drilling downhole tool, and particularly a kind of gas drilling belongs to the downhole tool class with the shunting pipe nipple.
Background technology
Gas drilling is with drilling fluid technology that enforcement is crept into as circulatory mediator such as gas replacement mud, is mainly used in the deep drilling of geological structure complexity.The gas drilling technology is than the conventional drilling technology, under the same formation condition, bit life and rate of penetration have significantly and to improve, and can solve engineering problems such as low pressure, fragmentation, water-sensitive strata leakage, differential sticking and firm hard formation drilling speed be low, increase substantially the drilling well overall efficiency.Usually, adopt nitrogen injection drilling at reservoir, main purpose is to find and the protection oil-gas Layer; Adopt air drilling at non-reservoir, main purpose then is to solve down-hole complexity, quickening bit speed, shortens drilling period.But when adopting gas drilling owing to following reason can cause shaft bottom annular space tolerance too high:
(1) variation of annular space mineshaft diameter;
(2) drilling assembly diameter variation;
(3) take the bits requirement for satisfying, the minimum speed of returning of air-flow needs greater than 15m/s in the pit shaft.
For satisfying the minimum fast requirement of returning, can cause shaft bottom tolerance too high, from and can produce the following problem:
(1) can cause the shaft bottom annular pressure to increase, the energy of part injecting gas can not be utilized effectively, and increases the load of ground air drilling equipment;
(2) high velocity air can aggravate the erosion problem to the soft formation borehole wall;
(3) the bit wear degree increases, and causes frequent bit change;
(4) service behaviour of reduction air hammer.
Summary of the invention
The utility model is to provide a kind of instrument that can solve the excessive problem of injecting gas of above-mentioned existence, for achieving the above object, adopt following technical scheme: mainly form by tool body 1, by-pass prot 2, interior shunting core tube 3, there is internal thread tool body 1 upper end, there is shallow grooves the lower end near the external screw thread certain position, the centre position has step in the by-pass prot 2 that upwards is evenly equipped with in week obliquely apart from by-pass prot 2 certain positions, near step surface internal thread is arranged; Interior shunting core tube 3 external surfaces are processed with several streamlined groove, and its lower end has external screw thread to be connected with the internal thread of tool body 1 near step surface; Interior shunting core tube 3 has sealing device with tool body 1 step surface, and the sealing device is to adopt sealing ring 4 sealings between interior shunting core tube 3 bottoms and tool body 1.
The beneficial effects of the utility model are: be at drill string reducing or mineshaft diameter change location and connect the utility model on the drill string, the excess air of injecting in the drill string is directly shunted a part without bit port at the reducing place enter annular space, reduce the shaft bottom annular pressure, and the pressure of increase reducing place annular space, take bits efficient thereby improve; The utility model is simple in structure, and interior shunting core tube 3 can be changed according to actual needs.
Description of drawings
Fig. 1 the utility model structural representation.
Specific embodiments
The utility model is described in more detail below in conjunction with accompanying drawing.
The purpose of this utility model is to provide a kind of gas drilling with shunting pipe nipple, mainly form by tool body 1, by-pass prot 2, interior shunting core tube 3, there is internal thread tool body 1 upper end, there is shallow grooves the lower end near the external screw thread certain position, be used for salvaging and use, tool body 1 centre position has step in the by-pass prot 2 that upwards is evenly equipped with in week obliquely apart from by-pass prot 2 certain positions, near step surface internal thread is arranged; Interior shunting core tube 3 external surfaces are processed with several streamlined groove, and its lower end has external screw thread to be connected with the internal thread of tool body 1 near step surface; Interior shunting core tube 3 has sealing device with tool body 1 step surface, and the sealing device is to adopt sealing ring 4 sealings between interior shunting core tube 3 bottoms and tool body 1.
Principle of the present utility model is: should shunt pipe nipple and be connected on drill string reducing position, gas injects in drill string, understand some gas during gas process shunting pipe nipple and enter bore hole annulus through by-pass prot 2 from the streamlined groove of interior shunting heart tube outer surface, thereby reduce bottom pressure and increase the pressure of reducing place annular space, improve and take bits efficient, gas described herein is any one air-flow, as natural gas, nitrogen, deoxidation air, compressed air etc.
The utility model has the advantage of simple in structurely, the interior shunting core tube 3 of its tool focus can be square Just dismounting and change.
Claims (2)
1. a gas drilling is with shunting pipe nipple, it is characterized in that: mainly form by tool body (1), by-pass prot (2), interior shunting core tube (3), there is internal thread tool body (1) upper end, there is shallow grooves the lower end near the external screw thread certain position, the centre position is in the by-pass prot (2) that upwards is evenly equipped with in week obliquely, apart from by-pass prot (2) certain position step in is arranged, internal thread is arranged near step surface; Interior shunting core tube (3) external surface is processed with several streamlined groove, and its lower end has external screw thread to be connected with the internal thread of tool body (1) near step surface; Interior shunting core tube (3) has sealing device with tool body (1) step surface.
2. a kind of gas drilling according to claim 1 is characterized in that with shunting pipe nipple: interior shunting core tube (3) is sealing ring (4) with the sealing device of tool body (1) step surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007203123935U CN201125687Y (en) | 2007-12-17 | 2007-12-17 | Split stream short node for gas drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007203123935U CN201125687Y (en) | 2007-12-17 | 2007-12-17 | Split stream short node for gas drilling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201125687Y true CN201125687Y (en) | 2008-10-01 |
Family
ID=39999158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007203123935U Expired - Fee Related CN201125687Y (en) | 2007-12-17 | 2007-12-17 | Split stream short node for gas drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201125687Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102345450A (en) * | 2010-08-05 | 2012-02-08 | 中国石油大学(北京) | Annulus flow-diverting joint (FDJ) and correlation calculation method thereof |
-
2007
- 2007-12-17 CN CNU2007203123935U patent/CN201125687Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102345450A (en) * | 2010-08-05 | 2012-02-08 | 中国石油大学(北京) | Annulus flow-diverting joint (FDJ) and correlation calculation method thereof |
| CN102345450B (en) * | 2010-08-05 | 2015-01-28 | 中国石油大学(北京) | Annulus flow-diverting joint (FDJ) and correlation calculation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20081219 Address after: Hongyan Karamay Road, the Xinjiang Uygur Autonomous Region No. 80, zip code: 834000 Patentee after: Western Drilling Kelamayi Drilling Technology Institute Address before: Hongyan Karamay Road, the Xinjiang Uygur Autonomous Region No. 80, zip code: 834000 Patentee before: Research Inst of Drilling Technology, Xinjiang Petroleum Administration |
|
| ASS | Succession or assignment of patent right |
Owner name: WEST DRILLING KARAMAY DRILLING CRAFT RESEARCH INST Free format text: FORMER OWNER: DRILLING WELL TECHNOLOGY INSTITUTE, PETROLEUM ADMINISTRATION BUREAU, XINJIANG Effective date: 20081219 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081001 Termination date: 20141217 |
|
| EXPY | Termination of patent right or utility model |