CN101215954A - High sealing property screw drill driving-shaft assembly - Google Patents
High sealing property screw drill driving-shaft assembly Download PDFInfo
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- CN101215954A CN101215954A CNA2008100451532A CN200810045153A CN101215954A CN 101215954 A CN101215954 A CN 101215954A CN A2008100451532 A CNA2008100451532 A CN A2008100451532A CN 200810045153 A CN200810045153 A CN 200810045153A CN 101215954 A CN101215954 A CN 101215954A
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Abstract
The invention relates to a threaded rod drilling tool drive shaft assembly with high sealing property, which is used in petroleum natural gas well drilling. The technical scheme of the invention is that knife edge sealing devices are divided into two groups namely an upper group and a lower group, wherein the group of lower knife edge sealing devices are installed on a lower short-pitch and connected with a driving shaft through screw bolts, an inner knife edge flange is supported by a flexible graphite ring, and the other group of upper knife edge sealing devices are installed between a shell and a water hat, and 1-6 layers of sealing pieces are arranged between two groups of knife edges. The flexible graphite ring is installed between the upper knife edge sealing devices and a bearing group and plays sealing and lubricating roles. A floating ring is arranged outside a needle bearing and two grooves are respectively opened on the inner and outer surfaces of the floating ring and provided with the flexible graphite ring. A sealing cavity is formed between two groups of knife edge sealing devices and the needle bearing, a radial bearing movable sleeve and a thrust bearing group are installed inside. The invention has the effects of good sealing property, long service life, high-temperature and high pressure resistance and small friction coefficient, has simple structure and low cost, and can be used in gas well drilling or slurry medium well drilling with high temperature and strong oscillation.
Description
Technical field
The present invention relates to a kind of helicoid hydraulic motor sealing device that is used for oil and gas well drilling, be particularly suitable for the screw drill transmission shaft assembly with high sealing performance of the mud medium deep-well ultradeep well drilling process use of gas base flow body drilling technology and high temperature strong vibration.
Background technology
One of a kind of well dynamic instrument that helicoid hydraulic motor uses when being oil drilling or workover treatment, driving-shaft assembly is one of four big critical pieces of helicoid hydraulic motor, also be one of parts of the easiest inefficacy, its effect is that the output torque of motor and rotating speed are passed to drill bit.Bear the axial and radial load that produces in the drilling process simultaneously.Driving-shaft assembly comprises parts such as power transmission shaft, transmission shaft shell, journal bearing, thrust bearings, water cap, following pipe nipple.The bid operation of oil gas field both at home and abroad in recent years; the Party A requires to use air drilling; air drilling has and significantly improves rate of penetration, effectively finds and protect technical advantage such as oil-gas Layer, but it is particularly had higher requirement to helicoid hydraulic motor to down-hole equipment simultaneously.Helicoid hydraulic motor conventional in air drilling can't use owing to lacking enough fluid lubrications; The oil seal transmission shaft helicoid hydraulic motor that occurs also can't stop the intrusion of gas base circulatory mediator (pure gas, gas-solid, gas-solid liquid) preferably through field experiment in recent years, application life is low, usually use and promptly lost efficacy in 40～50 hours, this not only causes frequently making a trip, and the stuck easy initiation drilling failure of bearing, also significantly reduce drilling efficiency thereby bring than the large economy loss.When the domestic existing sealed device for drive-shaft is used for the deep-well mud drilling at present, because the self seal ability causes result of use poor, application life is short, can't satisfy instructions for use, this in addition limited the band application of sealing device helicoid hydraulic motor in deep-well.
Summary of the invention
The objective of the invention is: have sealing compensation function, good seal performance in order to provide a kind of, frictional force is little, abrasion resistance good, the helicoid hydraulic motor transmission device of high temperature high voltage resistant, can prevent effectively that circulatory mediator such as gas base flow body, mud from entering in the annular seal space, prolong the application life of screw drill transmission shaft, a kind of screw drill transmission shaft assembly of special proposition with high sealing performance.
In order to achieve the above object, the present invention solves the technical scheme that this technical problem adopts: a kind of screw drill transmission shaft assembly with high sealing performance, form by power transmission shaft, sealing device, bearing, following pipe nipple, flange, diaphragm seal, its architectural feature is: the edge seal device is divided into two groups up and down, edge seal device 2 is installed in down between pipe nipple 6 and the power transmission shaft 1 under one group has bolt to be connected, interior edge of a knife flange 14 supports by soft graphite circle 10, and following edge seal sheet 15 is installed between interior edge of a knife flange 14 and the outer edge of a knife flange 16; Another group upper slitter mouth sealing device 9 is installed between housing 7 and the water cap 11, is provided with edge seal external seal sheet 17 in the sealing device 9, goes up diaphragm seal 18 in the edge seal; Edge seal has two kinds of combinations, concavo-convex sword and two protruding swords in two groups of edge seal devices 2,9; Between the inside and outside edge of a knife flange 14,16, between housing 7 and the water cap 11 1～6 layer of diaphragm seal is installed all; Between upper slitter mouth sealing device 17 and the bearing group 8 carbon seal ring 10 is installed; Floating ring 3 is installed in the outside of needle bearing 4, and its surfaces externally and internally has two grooves, and 1～7 group of soft graphite circle 10 wherein is housed; Between sealing device 2 and sealing device 9, form annular seal space, in moving cover 5 of needle bearing 4, journal bearing and thrust bearings 8 are installed.Plating one deck silver on edge of a knife blade, its thickness is 0.005mm, the application life that can improve sealing device.Diaphragm seal material stainless steel, nickel, hardness is big, and the width of groove is 2～4mm, and groove depth is not to bump point of a knife degree of being.In the last edge seal between diaphragm seal 18 and the water cap 11, to go up between edge seal external seal sheet 17 and the housing 7 be edge seal, is interference fit.Diaphragm seal 15,17,18 all can prolong axis with respect to power transmission shaft 1 and move, and avoids hard collision between the edge of a knife and the groove.Have housing bore 12 on the housing 7 of power transmission shaft 1; Between moving cover 5 of journal bearing and thrust bearings 8, anti-lost semi-ring 13 is housed.
The present invention compared with prior art, the beneficial effect that has is: (1) the present invention down is being equipped with the edge seal device respectively between pipe nipple and power transmission shaft, water cap and the housing, has good seal performance, life-span length, high temperature high voltage resistant, friction factor is little, sealing compensation is good effect; (2) between last edge seal and floating ring, carbon seal ring is housed, has used the soft graphite circle, increased the safety and the practicality of sealing at the groove of the surfaces externally and internally of floating ring; (3) the present invention is simple in structure, cost is low, can satisfy the mud drilling construction needs under body drilling well of gas base flow and the bad working environments, can be used in the mud medium drilling well of body drilling well of gas base flow and high temperature strong vibration
Description of drawings
Fig. 1 is a kind of structural representation with screw drill transmission shaft assembly of high sealing performance of the present invention.
Fig. 2 is the structural representation of following edge seal device in this driving-shaft assembly.
Fig. 3 is the structural representation of upper slitter mouth sealing device in this driving-shaft assembly.
Among the figure: 1. power transmission shaft, 2. descend the edge seal device, 3. floating ring, 4. needle bearing, 5. the moving cover of journal bearing 6. descends pipe nipple, 7. housing, 8. thrust bearings, 9. upper slitter mouth sealing device, 10. soft graphite circle, 11. water caps, 12. housing bores, 13 anti-lost semi-rings, 14. interior edge of a knife flanges, 15. times edge seal diaphragm seals, 16. outer edge of a knife flange, edge seal external seal sheet on 17., diaphragm seal in the edge seal on 18.
Fig. 4 produces groove on one of three kinds of form of structure of the sealing device edge of a knife of the present invention diaphragm seal.
Fig. 5 produces the edge of a knife on two diaphragm seals of form of structure of the sealing device edge of a knife of the present invention and respective slot is a triangle.
Fig. 6 produces the edge of a knife on three diaphragm seals of form of structure of the sealing device edge of a knife of the present invention and respective slot is a rectangle.
The specific embodiment
According to Fig. 1, Fig. 2, shown in Figure 3, the edge seal device is divided into two groups up and down, and edge seal device 2 is installed in down between pipe nipple 6 and the power transmission shaft 1 under one group has bolt to be connected, and interior edge of a knife flange 14 leans on 10 supports of soft graphite circle; Another group upper slitter mouth sealing device 9 is installed between housing 7 and the water cap 11.Between sealing device 2 and sealing device 9, form annular seal space like this, edge seal can prevent effectively that circulatory mediator from entering annular seal space and lubrication oil is revealed from the chamber, thereby make journal bearing 4 and thrust bearings 8 not be subjected to the influence of circulatory mediator, remain high lubricating status, raise the efficiency and life-saving.
Between the inside and outside edge of a knife flange 14,16, between housing 7 and the water cap 11 1～6 diaphragm seal is arranged all, prevent from that the displacement that produced by high vibration from producing the edge of a knife to destroy and cause the edge of a knife and lost efficacy.Use multi-layer sealed can make edge of a knife fluctuating range on the diaphragm seal in the width range of groove.Plating one deck silver (about 0.005mm) on edge of a knife blade, silver coating have anti-preferably bonding ability and lubricating ability, and silver coating can improve the application life of sealing device.
Between upper slitter mouth sealing device 9 and bearing group 8 carbon seal ring 10 being arranged, is the best with 6 soft graphite sealing rings, utilizes the strong adsorption capacity and the further enhanced leaktightness performance of self-lubricating property of soft graphite circle.Edge seal device and soft graphite circle all have automatic compensation function in addition, and the edge seal device is realized self compensation by the fit dimension of the edge of a knife and groove, and soft graphite is by self thermal expansion realization self compensation.
Fig. 4, Fig. 5, Fig. 6 are a kind of three kinds of form of structure with screw drill transmission shaft assembly sealing device (edge of a knife) of high sealing performance of invention.Fig. 4 produces groove on the diaphragm seal, and Fig. 5 is a triangle for the generation edge of a knife and respective slot on the diaphragm seal, and Fig. 6 is a rectangle for the generation edge of a knife and respective slot on the diaphragm seal.Groove shapes and performance, housing wall thickness and the processing conditions of neglecting the seal stock material are greatly selected.
Claims (5)
1. screw drill transmission shaft assembly with high sealing performance, form by power transmission shaft, sealing device, bearing, following pipe nipple, flange, diaphragm seal, it is characterized in that: the edge seal device is divided into two groups up and down, edge seal device (2) is installed in down between pipe nipple (6) and the power transmission shaft (1) under one group has bolt to be connected, interior edge of a knife flange (14) supports by soft graphite circle (10), and following edge seal diaphragm seal (15) is installed between interior edge of a knife flange (14) and the outer edge of a knife flange (16); Another group upper slitter mouth sealing device (9) is installed between housing (7) and the water cap (11), is provided with edge seal external seal sheet (17) in the sealing device (9), goes up diaphragm seal (18) in the edge seal; Two groups of edge seal devices (2), (9) interior edge seal have two kinds of combinations, concavo-convex sword and two protruding swords; Between inside and outside edge of a knife flange (14), (16), between housing (7) and the water cap (11) 1～6 layer of diaphragm seal is installed all; Between upper slitter mouth sealing device (17) and the bearing group (8) carbon seal ring (10) is installed; Floating ring (3) is installed in the outside of needle bearing (4), and its surfaces externally and internally has two grooves, and 1～7 group of soft graphite circle (10) wherein is housed; Between sealing device (2), (9), form annular seal space, in the moving cover of needle bearing (4), journal bearing (5) and thrust bearings (8) are installed.
2. screw drill transmission shaft assembly according to claim 1 is characterized in that: plating one deck silver on edge of a knife blade, its thickness is at 0.005mm.
3. screw drill transmission shaft assembly according to claim 1 is characterized in that: diaphragm seal material stainless steel, nickel etc., and hardness is big, and the width of groove is the 2-4 millimeter, and groove depth is not to bump point of a knife degree of being.
4. screw drill transmission shaft assembly according to claim 1 is characterized in that: going up between interior diaphragm seal (18) of edge seal and the water cap (11), going up between edge seal external seal sheet (17) and the housing (7) is edge seal, is interference fit.
5. screw drill transmission shaft assembly according to claim 1 is characterized in that: have housing bore (12) on the housing (7) of power transmission shaft (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100451532A CN101215954A (en) | 2008-01-09 | 2008-01-09 | High sealing property screw drill driving-shaft assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100451532A CN101215954A (en) | 2008-01-09 | 2008-01-09 | High sealing property screw drill driving-shaft assembly |
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| Publication Number | Publication Date |
|---|---|
| CN101215954A true CN101215954A (en) | 2008-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100451532A Pending CN101215954A (en) | 2008-01-09 | 2008-01-09 | High sealing property screw drill driving-shaft assembly |
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| CN (1) | CN101215954A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102072322A (en) * | 2011-01-31 | 2011-05-25 | 江苏金鹰流体机械有限公司 | Combined type sealing device with double end faces |
| CN102296928A (en) * | 2011-09-06 | 2011-12-28 | 西南石油大学 | Transmission shaft assembly of oil sealing cavity pressure balancing spiral drilling rig |
| CN102536113A (en) * | 2012-03-02 | 2012-07-04 | 西南石油大学 | Underground electric drill device and method capable of reducing torque borne by drill stem |
| CN102536112A (en) * | 2012-02-09 | 2012-07-04 | 东营锐旭石油技术有限公司 | Sealable screw drill transmission shaft |
| CN104533281A (en) * | 2014-12-09 | 2015-04-22 | 沈阳工业大学 | Oil seal PDM (positive displacement motor) drill |
| CN107631007A (en) * | 2017-09-04 | 2018-01-26 | 西南石油大学 | A kind of screw rod drilling tool seal transmission shaft assembly |
| CN108194033A (en) * | 2017-12-21 | 2018-06-22 | 天津立林石油机械有限公司 | Helicoid hydraulic motor double compensation automatic pressure-regulating oil seal transmission shaft assembly |
| CN109025869A (en) * | 2018-08-22 | 2018-12-18 | 西南石油大学 | A kind of oil/gas drilling fluid circulating device |
-
2008
- 2008-01-09 CN CNA2008100451532A patent/CN101215954A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102072322A (en) * | 2011-01-31 | 2011-05-25 | 江苏金鹰流体机械有限公司 | Combined type sealing device with double end faces |
| CN102296928A (en) * | 2011-09-06 | 2011-12-28 | 西南石油大学 | Transmission shaft assembly of oil sealing cavity pressure balancing spiral drilling rig |
| CN102536112A (en) * | 2012-02-09 | 2012-07-04 | 东营锐旭石油技术有限公司 | Sealable screw drill transmission shaft |
| CN102536113A (en) * | 2012-03-02 | 2012-07-04 | 西南石油大学 | Underground electric drill device and method capable of reducing torque borne by drill stem |
| CN104533281A (en) * | 2014-12-09 | 2015-04-22 | 沈阳工业大学 | Oil seal PDM (positive displacement motor) drill |
| CN107631007A (en) * | 2017-09-04 | 2018-01-26 | 西南石油大学 | A kind of screw rod drilling tool seal transmission shaft assembly |
| CN107631007B (en) * | 2017-09-04 | 2020-02-21 | 西南石油大学 | Novel screw drill sealing transmission shaft assembly |
| CN108194033A (en) * | 2017-12-21 | 2018-06-22 | 天津立林石油机械有限公司 | Helicoid hydraulic motor double compensation automatic pressure-regulating oil seal transmission shaft assembly |
| CN108194033B (en) * | 2017-12-21 | 2024-03-29 | 天津立林石油机械有限公司 | Double-compensation automatic pressure-regulating oil seal transmission shaft assembly of screw drilling tool |
| CN109025869A (en) * | 2018-08-22 | 2018-12-18 | 西南石油大学 | A kind of oil/gas drilling fluid circulating device |
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Open date: 20080709 |