CN103899250B - A kind of device improving oil gas well drilling speed - Google Patents

A kind of device improving oil gas well drilling speed Download PDF

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Publication number
CN103899250B
CN103899250B CN201410153115.4A CN201410153115A CN103899250B CN 103899250 B CN103899250 B CN 103899250B CN 201410153115 A CN201410153115 A CN 201410153115A CN 103899250 B CN103899250 B CN 103899250B
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China
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spring
cylinder
diameter
spline
urceolus
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CN201410153115.4A
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CN103899250A (en
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刘永旺
管志川
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中国石油大学(华东)
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Abstract

The invention belongs to petroleum works field, particularly, relate to a kind of device improving oil gas well drilling speed.The device improving oil gas well drilling speed comprises: shutoff joint, piston assembly, supercharging assembly urceolus under mandrel body, spline urceolus, spring protection cylinder, main assemblage of spring, spring; It is characterized in that: mandrel body is threaded with piston assembly; Under spline urceolus, spring protection cylinder, spring, shutoff joint, supercharging assembly urceolus are threaded connection; Main assemblage of spring is placed in spring protection cylinder.The energy source of apparatus of the present invention work is in drillstring vibrations, and energy increases along with the increase of well depth, and the course of work of device reduces the damaging effect of vibration; Namely device can improve efficiency of breaking rock, can strengthen again shaft bottom and take rock effect; This apparatus structure is simple, stable performance, and use procedure can not bring otherwise risk for drillng operation; This device does not need the structure changing drill string, has nothing to do with application bite type, applied widely, convenient popularization and application.

Description

A kind of device improving oil gas well drilling speed

Technical field

The invention belongs to petroleum works field, particularly, rock drilling apparatus is broken in the down-hole related in a kind of oil, Natural Gas Drilling Operation, particularly relates to a kind of device improving oil gas well drilling speed.

Background technology

Deep-well or the slow problem of hard formation bit speed govern the further exploitation of oil-gas resource always, oil worker have developed multiple downhole tool or device to improve the efficiency of drilling well, comprises mud motor, down-hole rotary percussion drill by driving well tool, down-hole torsional impact drilling tool, downhole fluid jet flow generating apparatus, underground pulse efflux emitter etc.On-the-spot application result shows, these instruments all can play the effect improving bit speed under certain condition.But analyze and find, although the mechanism of these instruments speed-raising is different, these instruments exist common feature, namely instrument plays its energy source acted on and all derives from drilling circulation medium, and the mechanism of speed-raising is comparatively single.Drilling practice draws: along with the increase of well depth, and drilling circulation medium pressure consumption increases.At profound well, even occur that circulatory mediator only can meet migrating rock cuttings with circulation and without the phenomenon of other energy.Well imagine, in this well, above-mentioned carried instrument or device duty can be greatly affected, and occurring most probably working even affects the possibility that drillng operation carries out.In addition, subterranean strata is different, wants to improve its rate of penetration, and the ways and means of employing there are differences, and same speed-raising mechanism is difficult to be applicable to multiple stratum.Therefore, seek downhole tool speed-raising energy and newly originate, and research and development utilize new forms of energy and collaborative multiple speed-raising mechanism symphyogenetic down-hole speed-raising instrument is significantly.

Summary of the invention

In view of the foregoing defects the prior art has, the invention provides a kind of device improving oil gas well drilling speed, this device can be introduced annular fluid simultaneously and increase shaft bottom drilling fluid displacement, introduces the energy of the energy-drillstring vibrations beyond drilling fluid, realizes pulsing jet modulation, both efficiency of breaking rock can be improved, shaft bottom can be strengthened again and take rock effect, thus improve rate of penetration.

For achieving the above object, the present invention adopts following proposal:

Improve the device of oil gas well drilling speed, comprising: shutoff joint, piston assembly, supercharging assembly urceolus under mandrel body, spline urceolus, spring protection cylinder, main assemblage of spring, spring; Mandrel body is threaded with piston assembly; Under spline urceolus, spring protection cylinder, spring, shutoff joint, supercharging assembly urceolus are threaded connection; Main assemblage of spring is placed in spring protection cylinder.

Relative to prior art, the present invention has following beneficial effect:

1, the energy source of this device work is in drillstring vibrations, and energy increases along with the increase of well depth, and the course of work of device reduces the damaging effect of vibration; The circulation of work on drilling fluid of device does not form impact, even if tool failures, drillng operation also can proceed;

2, device achieves and increases shaft bottom drilling fluid displacement, introduces annular fluid, introduces the energy beyond drilling fluid and realizes the object of pulsing jet modulation, namely can improve efficiency of breaking rock, can strengthen again shaft bottom and take rock effect;

3, simple, the stable performance of this apparatus structure, use procedure can not bring otherwise risk for drillng operation;

4, this device does not need the structure changing drill string, has nothing to do with application bite type, applied widely, convenient popularization and application.

Accompanying drawing explanation

Fig. 1 is the structural representation of the device improving oil gas well drilling speed;

Fig. 2 is mandrel body structure chart;

Fig. 3 is supercharging assembly outer tube structure figure;

Fig. 4 is the A-A generalized section in Fig. 1;

Fig. 5 is the B-B generalized section in Fig. 1;

Fig. 6 is the C-C generalized section in Fig. 1;

Fig. 7 is the D-D generalized section in Fig. 1;

Fig. 8 is the E-E generalized section in Fig. 1;

Fig. 9 is piston body structure figure;

In figure: 1, mandrel body, 2, protecting against shock end cover, 3, spline chamber seal assembly, 4, spline urceolus, 5, oil filler point, 6, spacing ring, 7, spring protection cylinder, 8, main assemblage of spring, 9, spring cavity seal assembly, 10, annular fluid inlet one-way valve, 11, shutoff joint under spring, 12, supercharging liner packing, 13, piston body seal assembly, 14, piston assembly, 15, annular fluid Outlet check valves, 16, drilling tool endoporus one way valve, 17, supercharging assembly urceolus, 18, supercharging cylinder sleeve, 19, spline lubrication sap cavity, 20, spring lubrication sap cavity, 21, steam vent, 22, annular fluid entrance overcurrent hold-down head, 23, annular fluid entrance channel, 24, annular space drilling fluid storage chamber, 25, annular fluid outlet flow, 26 huge discharge fluid jet pulsation supercharging bunchers.

Detailed description of the invention

As shown in Figure 1, improve the device of oil gas well drilling speed, comprising: shutoff joint 11, piston assembly 14, supercharging assembly urceolus 17 under mandrel body 1, spline urceolus 4, spring protection cylinder 7, main assemblage of spring 8, spring; Mandrel body 1 is threaded with piston assembly 14; Under spline urceolus 4, spring protection cylinder 7, spring, shutoff joint 11, supercharging assembly urceolus 17 are threaded connection; Main assemblage of spring 8 is placed in spring protection cylinder 7.

As shown in Figure 2, described mandrel body 1 has circular hole along its axis, circular hole be used for drilling fluid overcurrent, the top of mandrel body 1 with drill collar button, for connecting top drilling assembly; Mandrel body 1 outside is followed successively by bottom by top: the face of cylinder 101 of linking closely, sliding sealing surface 102, spline body 103, spacing screw thread 104, the spring inner support face of cylinder 105, piston thread 106; Sliding sealing surface 102 is the chromium plating face of cylinder, and the diameter of sliding sealing surface 102 is less than the diameter on the face of cylinder 101 of linking closely; Spline body 103 tip diameter is equal with sliding sealing surface 102 external diameter, and spline body 103 root diameter is greater than the large footpath of spacing screw thread 104; Spacing screw thread 104 path is greater than the spring inner support face of cylinder 105 diameter; The spring inner support face of cylinder 105 diameter is greater than the large footpath of piston thread 106.

Described spline urceolus 4 is cylindrical shell, top outside spline urceolus 4 is that end cap connects external screw thread, middle part is the face of cylinder, bottom is that spring protection cylinder connects external screw thread, and the external diameter of spline urceolus 4 cylindrical surface portion is equal with the face of cylinder external diameter that links closely of mandrel body 1; Top inside spline urceolus 4 is righting cylinder, bottom is internal spline, and the internal diameter of righting cylinder is slightly larger than the external diameter of mandrel body 1 sliding sealing surface 102; Internal spline matches with the spline body 103 of mandrel body 1, and forms spline lubrication sap cavity 19, and spline urceolus 4 can slide up and down relative to mandrel body 1; Protecting against shock end cover 2 is installed on spline urceolus 4 top, and the top inner side of spline urceolus 4 is provided with spline chamber seal assembly 3, and seal assembly 3 flows into annular space for preventing the lubrication oil in spline lubrication sap cavity 19; Have oil filler point in the middle part of spline urceolus 4, oil filler point is used for injecting lubricating fluid in spline lubrication sap cavity 19, installing oil filler point plug 5, flowing out for preventing lubricating fluid in oil filler point.

The external diameter of protecting against shock end cover 2 is equal with the external diameter on the face of cylinder 101 of linking closely, and the top of protecting against shock end cover 2 has circular hole, and the diameter of this circular hole is slightly larger than the external diameter of sliding sealing surface 102, and this circular hole and sliding sealing surface form the gap sealing and allow; The inside sidewalls of protecting against shock end cover 2 is provided with end cap screw thread, and protecting against shock end cover 2 is connected external screw thread by end cap screw thread with the end cap of spline urceolus 4 and connects; Protecting against shock end cover 2 limits the scope of spline urceolus 4 up stroke, and bears spline urceolus 4 top and the impact of lower end, the face of cylinder 101 step surface that links closely.In addition, spline chamber seal assembly 3 can be pressed in spline urceolus 4 by protecting against shock end cover 2, prevents the lubrication oil in spline lubrication sap cavity 19 from being released by spline chamber seal assembly 3.

Described spring protection cylinder 7 is cylindrical shell, and the external diameter of spring protection cylinder 7 is equal with the external diameter on the face of cylinder 101 of linking closely; Top inside spring protection cylinder 7 is upper screw thread, middle part is spring outer support face, bottom is lower screw thread; The upper screw thread of spring protection cylinder 7 connects external screw thread for the spring protection cylinder connecting spline urceolus 4, and lower screw thread is for shutoff joint 11 under linking springs, and the internal diameter in spring outer support face is greater than spring diameter 2-6mm; Have steam vent in the middle part of spring protection cylinder 7, when injecting lubricating fluid in spline lubrication sap cavity 19, steam vent is for discharging the air of spline lubrication sap cavity 19 inside, and install steam vent plug 21 in steam vent, steam vent plug 21 flows out for preventing lubricating fluid.

Female cylinder is with centered by spacing ring 6; spacing ring 6 external diameter is slightly less than the internal diameter in spring protection cylinder 7 spring outer support face; spacing ring 6 external diameter is greater than the diameter of spline urceolus 4 spline basic circle (i.e. circle at the bottom of spline tooth); the internal thread of spacing ring 6 matches with the spacing screw thread 104 of mandrel body 1; for spacing ring 6 spline urceolus 4 provides power upwards in trip-out process, the bottom surface of spacing ring 6 is the upper supporting surface of main assemblage of spring 8.

Under described spring, shutoff joint 11 is cylindrical shell, and the top in outside is spring protection cylinder connecting thread, middle part is the joint face of cylinder, bottom is supercharging assembly urceolus connecting thread, and inner side is joint inner cylinder face, the diameter of joint inner cylinder face, slightly larger than the external diameter on the mandrel body 1 spring inner support face of cylinder, joint inner cylinder face is provided with seal groove, is provided with spring cavity seal assembly 9 in seal groove, diameter and the mandrel body 1 on the joint face of cylinder face of cylinder external diameter that links closely is equal, same plane along the circumferential direction uniform four radial blind holes perpendicular to axis are positioned in the middle part of the joint face of cylinder, blind hole depth is less than this section of wall thickness, blind hole is communicated with the bottom surface of shutoff joint 11 under spring by the annular fluid entrance channel 23 of corresponding setting vertically, annular fluid inlet one-way valve 10 is limited among blind hole by annular fluid entrance overcurrent hold-down head 22, overcurrent hold-down head 22 is the circular orifice with diameter 2-3mm circular hole, annular fluid inlet one-way valve 10 allows that annular fluid is unidirectional enters annular space drilling fluid storage chamber 24, spring protection cylinder connecting thread is used for linking springs protection cylinder 7, and supercharging assembly urceolus connecting thread is for connecting supercharging assembly urceolus 17.The cavity that supercharging cylinder sleeve 18, supercharging assembly urceolus 17 and piston assembly 14 are formed is huge discharge fluid jet pulsation supercharging buncher 26.

Main assemblage of spring 8 is back-moving spring, and main assemblage of spring 8 is the combination of helical spring and liquid spring or the combination of disk spring and liquid spring.Main assemblage of spring 8 to be arranged under spacing ring 6 lower plane and spring on shutoff joint 11 between plane, for the reset of device entirety.

As shown in Figure 8, described supercharging assembly urceolus 17 is cylindrical shell, and external diameter and the mandrel body 1 of the cylindrical shell face of cylinder 101 external diameter that links closely is equal; Be followed successively by from top to bottom inside supercharging assembly urceolus 17: shutoff joint connections threads 1701, cylinder sleeve righting face 1702, cylinder sleeve pressure-bearing surface 1703, drilling fluid flow orifice 1704 and drill bit junction button 1705 under spring.

Under spring, shutoff joint connections threads 1701 is for shutoff joint 11 under linking springs; Supercharging cylinder sleeve 18 is provided with in cylinder sleeve righting face 1702; Supercharging cylinder sleeve 18 is less than cylinder sleeve righting face 1702 internal diameter for external diameter, and internal diameter is slightly larger than the cylinder of piston assembly 14 external diameter, equal with the internal diameter of cylinder sleeve pressure-bearing surface 1703; Cylinder sleeve righting face 1702 provides radial support for supercharging cylinder sleeve, and the top in cylinder sleeve righting face 1702 has seal groove, installs supercharging liner packing 12 in seal groove; Step surface between cylinder sleeve righting face 1702 and cylinder sleeve pressure-bearing surface 1703 is used for providing axial support for supercharging cylinder sleeve; Supercharging cylinder sleeve 18 inwall refines, for reducing the frictional resistance between piston body seal assembly 13; Drill bit junction button 1705 is for connecting drill bit.

As shown in Figure 9, piston assembly 14, comprising: piston parent 141, annular fluid Outlet check valves 15, piston body seal assembly 13, drilling tool endoporus one way valve 16; Piston parent 141 is cylindrical shell, and piston parent 141 inner tip is with mandrel body connecting thread 1401, and mandrel body connecting thread 1401 is for connecting mandrel body 1; Piston parent 141 bottom is provided with one way valve installing hole 1402, for installing drill orate one way valve 16; Drilling tool endoporus one way valve 16 is the valve body only allowing drilling fluid to flow to shaft bottom; Piston parent 141 outer upper ends external diameter is little, middle part external diameter is large, lower outer diameter is little; Little external diameter position, upper end is upper button column face 1403, major diameter position, middle part is sealing righting face 1404; Upper button column face 1403 is for binding thread, and sealing righting face 1404 is provided with piston body seal assembly 13; Little external diameter position, piston parent 141 bottom can be that piston parent more than 141 drilling medium is dirty provides space; The annular fluid outlet flow 25 of the circumferential uniform up/down perforation of piston parent 141, the lower end of annular fluid outlet flow 25 is provided with annular fluid Outlet check valves installing hole 1405, installs annular space fluid issuing one way valve 15 in annular fluid Outlet check valves installing hole 1405; For controlling, drilling fluid in annular space drilling fluid storage chamber 24 is unidirectional enters huge discharge fluid jet pulsation supercharging buncher 26 to annular fluid Outlet check valves 15.

The device operating principle of above-mentioned raising oil gas well drilling speed is as follows:

Mandrel body 1, spacing ring 6, piston assembly 14 are threaded connection composition drillstring vibrations interlock assembly.The drill collar button on mandrel body 1 top is for connecting top drilling tool; The spline fitted of spline body and spline urceolus 4 inside at middle part is for transmitting drilling torque, and spacing ring 6 is threadedly connected on the spacing screw thread of mandrel body 1, limits the stroke of spline, and serves as the support of main assemblage of spring 8, is also used for anti-bottom hole static to hold the assembly that shakes and come off; Mandrel body 1 lower end connects piston assembly 14, and piston body seal assembly 13 is installed in the circumferential cell body of piston assembly 14, for separating annular space drilling fluid storage chamber 24 and huge discharge fluid jet pulsation supercharging buncher 26; The uniform multiple annular fluid outlet flow 25 of piston assembly 14 circumference, annular fluid outlet flow 25 bottom is equipped with annular fluid Outlet check valves 15, and annular fluid one direction can be made to enter huge discharge annular fluid jet fluctuation supercharging buncher 26; Piston assembly 14 bottom is provided with drilling tool endoporus one way valve 16, and the drilling fluid one direction provided for limiting ground pump enters huge discharge fluid jet pulsation supercharging buncher 26, with annular fluid jet mixing, thus produces huge discharge high-voltage pulse annular fluid jet.

Under protecting against shock end cover 2, spline chamber seal assembly 3, spline urceolus 4, oil filler point plug 5, steam vent plug 21, spring protection cylinder 7, spring, shutoff joint 11, spring cavity seal assembly 9, annular fluid inlet one-way valve 10, annular fluid entrance overcurrent hold-down head 24, supercharging cylinder sleeve 18, supercharging liner packing 12, supercharging assembly urceolus 17 are connected to form bottom hole static and hold the assembly that shakes.Protecting against shock end cover 2 is connected with spline urceolus 4 by screw thread, for the protection of spline chamber seal assembly 3, and bears the impact with mandrel body 1 upper stage terrace; Spline chamber seal assembly 3 is installed in the seal groove offered spline urceolus 4 upper end, for separating the lubrication oil in annular space drilling fluid and spline lubrication sap cavity 19; The top of spring protection cylinder 7 is connected with spline urceolus 4 lower end by screw thread, and bottom is connected with shutoff joint 11 top under spring, for the protection of the main assemblage of spring 8 in cylinder by screw thread; The seal groove that under spring, shutoff joint 11 endoporus top is opened is equipped with spring cavity seal assembly, for separating the lubricating fluid in spline lubrication sap cavity 19 and the fluid in annular space drilling fluid storage chamber 24; Under spring, shutoff joint 11 axially installs multiple annular fluid entrance overcurrent hold-down head 22, annular fluid inlet one-way valve 10 is equipped with in annular fluid entrance overcurrent hold-down head 22 inside, enters in annular space drilling fluid storage chamber 24 for the drilling fluid one direction with landwaste annular fluid controlled in annular space; Between the annular fluid inlet one-way valve 10 that annular fluid entrance channel 23 is distributed in shutoff joint 11 under spring vertically and annular space drilling fluid storage chamber 24; Under spring, shutoff joint 11 bottom is connected with supercharging assembly urceolus 17 by screw thread, supercharging cylinder sleeve 18 is equipped with in supercharging assembly urceolus 17 inside, between supercharging assembly urceolus 17 and supercharging cylinder sleeve 18, supercharging liner packing 12 is housed, for separating huge discharge fluid jet pulsation supercharging buncher 26 and the fluid in bore hole annulus; Supercharging assembly urceolus 17 lower end is buckled with drill bit, for connecting drill bit.

In drilling process, due to touching of drill string and the borehole wall rub, drill bit causes method of longitudinal vibration of drilling string in beating etc. of shaft bottom.When drillstring vibrations, drillstring vibrations interlock assembly holds relative to bottom hole static the assembly that shakes and produces relative motion, and this movement velocity presents cyclically-varying, when vibrating downwards, after speed of related movement accelerates to a certain speed by 0, speed reduces until return 0, vibrates end downwards; When upwards vibrating beginning, after speed of related movement accelerates to reciprocal a certain speed by 0, speed reduces until return 0, then starts downward vibration, so goes round and begins again.When drill string vibrates downwards, bottom hole assemblies drives the relative bottom hole static of drillstring vibrations interlock assembly to hold the assembly that shakes and moves downward, when speed of related movement exceedes the Flow Velocity excessively in drilling fluid cross section in supercharging cylinder sleeve 18, annular fluid Outlet check valves 15 and drilling tool endoporus one way valve 16 are closed, fluid pressure raises in huge discharge fluid jet pulsation supercharging buncher 26, the plain nozzle that drill bit is installed is formed high-voltage positive pulses annular fluid jet; Meanwhile, annular space carries the filtration of drilling fluid through annular fluid entrance overcurrent hold-down head 22 sieve aperture of granule landwaste, flow through annular fluid inlet one-way valve 10, annular fluid entrance channel 23 enters into annular space drilling fluid storage chamber 24, provide preparation for annular fluid when drill string upwards vibrates enters huge discharge fluid jet pulsation supercharging buncher 26.When drill string upwards vibrates, bottom hole assemblies drives the relative bottom hole static of drillstring vibrations interlock assembly to hold the assembly that shakes and moves upward, annular fluid Outlet check valves 15 and drilling tool endoporus one way valve 16 are opened, the drilling fluid of drilling tool hollow normally flows to shaft bottom, play its effect, meanwhile, annular fluid inlet one-way valve 10 is closed, annular fluid Outlet check valves 15 is opened, carry the drilling fluid of granule landwaste through annular fluid outlet flow 25, annular fluid Outlet check valves 15 enters into huge discharge annular space jet fluctuation supercharging buncher 26, wait for that drill string again forms huge discharge high-voltage positive pulses fluid jet when vibrating downwards.So go round and begin again, device utilizes the huge discharge high-voltage positive pulses jet produced to improve efficiency of breaking rock in shaft bottom, strengthens shaft bottom and takes rock effect, thus improve rate of penetration.

Claims (8)

1. improve a device for oil gas well drilling speed, comprising: shutoff joint, piston assembly, supercharging assembly urceolus under mandrel body, spline urceolus, spring protection cylinder, main assemblage of spring, spring, it is characterized in that: mandrel body is threaded with piston assembly, under spline urceolus, spring protection cylinder, spring, shutoff joint, supercharging assembly urceolus are threaded connection, main assemblage of spring is placed in spring protection cylinder, under spring, shutoff joint is cylindrical shell, and the top in outside is spring protection cylinder connecting thread, middle part is the joint face of cylinder, bottom is supercharging assembly urceolus connecting thread, and inner side is joint inner cylinder face, the diameter of joint inner cylinder face, slightly larger than the external diameter on the mandrel body spring inner support face of cylinder, joint inner cylinder face is provided with seal groove, is provided with spring cavity seal assembly in seal groove, diameter and the mandrel body on the joint face of cylinder face of cylinder external diameter that links closely is equal, same plane along the circumferential direction uniform four radial blind holes perpendicular to axis are positioned in the middle part of the joint face of cylinder, blind hole depth is less than this section of wall thickness, blind hole is communicated with the bottom surface of shutoff joint under spring by the annular fluid entrance channel of corresponding setting vertically, annular fluid inlet one-way valve is limited among blind hole by annular fluid entrance overcurrent hold-down head, overcurrent hold-down head is the circular orifice with diameter 2-3mm circular hole, annular fluid inlet one-way valve allows that annular fluid is unidirectional enters annular space drilling fluid storage chamber, piston assembly, comprising: piston parent, annular fluid Outlet check valves, piston body seal assembly, drilling tool endoporus one way valve, piston parent is cylindrical shell, and piston parent inner tip is with mandrel body connecting thread, piston parent bottom is provided with one way valve installing hole, installing drill orate one way valve in one way valve installing hole, piston parent outer upper ends external diameter is little, middle part external diameter is large, lower outer diameter is little, little external diameter position, upper end is upper button column face, major diameter position, middle part is sealing righting face, sealing righting face is provided with piston body seal assembly, the annular fluid outlet flow of the uniform up/down perforation of piston parent circumference, the lower end of annular fluid outlet flow is provided with annular fluid Outlet check valves installing hole, installs annular space fluid issuing one way valve in annular fluid Outlet check valves installing hole.
2. the device of raising oil gas well drilling speed according to claim 1, it is characterized in that, described mandrel body has circular hole along its axis, the top of circle mandrel body is with drill collar button, and mandrel body outside is followed successively by bottom by top: the face of cylinder of linking closely, sliding sealing surface, spline body, spacing screw thread, the spring inner support face of cylinder, piston thread; Sliding sealing surface is the chromium plating face of cylinder, and the diameter of sliding sealing surface is less than the diameter on the face of cylinder of linking closely; Spline body tip diameter is equal with sliding sealing surface external diameter, and spline body root diameter is greater than spacing Major Diam; Spacing diameter of thread is greater than spring inner support face of cylinder diameter; Spring inner support face of cylinder diameter is greater than the large footpath of piston thread.
3. the device of raising oil gas well drilling speed according to claim 2, it is characterized in that, described spline urceolus is cylindrical shell, top outside spline urceolus is that end cap connects external screw thread, middle part is the face of cylinder, bottom is that spring protection cylinder connects external screw thread, and the external diameter of spline urceolus cylindrical surface portion is equal with the face of cylinder external diameter that links closely of mandrel body; Top inside spline urceolus is righting cylinder, bottom is internal spline, and the internal diameter of righting cylinder is slightly larger than the external diameter of mandrel body sliding sealing surface; The spline mates of internal spline and mandrel body, and form spline lubrication sap cavity; Protecting against shock end cover is installed on spline urceolus top, and the top inner side of spline urceolus is provided with spline chamber seal assembly; Have oil filler point in the middle part of spline urceolus, in oil filler point, oil filler point plug is installed.
4. the device of raising oil gas well drilling speed according to claim 3, it is characterized in that, the external diameter of protecting against shock end cover is equal with the external diameter on the face of cylinder of linking closely, the top of protecting against shock end cover has circular hole, the diameter of this circular hole is slightly larger than the external diameter of sliding sealing surface, and this circular hole and sliding sealing surface form the gap sealing and allow; The inside sidewalls of protecting against shock end cover is provided with end cap screw thread, and protecting against shock end cover is connected external screw thread by end cap screw thread with the end cap of spline urceolus and connects.
5. the device of raising oil gas well drilling speed according to claim 4, is characterized in that, described spring protection cylinder is cylindrical shell, and the external diameter of spring protection cylinder is equal with the external diameter on the face of cylinder of linking closely; Top inside spring protection cylinder is upper screw thread, middle part is spring outer support face, bottom is lower screw thread; The internal diameter in spring outer support face is greater than spring diameter 2-6mm; Have steam vent in the middle part of spring protection cylinder, in steam vent, steam vent plug is installed.
6. the device of raising oil gas well drilling speed according to claim 5; it is characterized in that; female cylinder is with centered by spacing ring; spacing ring external diameter is slightly less than the internal diameter in spring protection cylinder spring outer support face; spacing ring external diameter is greater than spline urceolus spline base diameter of a circle, and the internal thread of spacing ring matches with the spacing screw thread of mandrel body.
7. the device of raising oil gas well drilling speed according to claim 6, is characterized in that, main assemblage of spring is the combination of helical spring and liquid spring or the combination of disk spring and liquid spring; Main assemblage of spring to be arranged under spacing ring lower plane and spring on shutoff joint between plane.
8. the device of raising oil gas well drilling speed according to claim 7, is characterized in that, described supercharging assembly urceolus is cylindrical shell, and external diameter and the mandrel body of the cylindrical shell face of cylinder external diameter that links closely is equal; Be followed successively by from top to bottom inside supercharging assembly urceolus: shutoff joint connections threads, cylinder sleeve righting face, cylinder sleeve pressure-bearing surface, drilling fluid flow orifice and drill bit junction button under spring; Under spring, shutoff joint connections threads is for shutoff joint under linking springs; Supercharging cylinder sleeve is provided with in cylinder sleeve righting face; Supercharging cylinder sleeve is that external diameter is less than cylinder sleeve righting face internal diameter, and internal diameter is slightly larger than the cylinder of piston assembly external diameter, equal with the internal diameter of cylinder sleeve pressure-bearing surface; The top in cylinder sleeve righting face has seal groove, installs supercharging liner packing in seal groove; Supercharging inboard wall of cylinder liner refines.
CN201410153115.4A 2014-04-16 2014-04-16 A kind of device improving oil gas well drilling speed CN103899250B (en)

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CN103452481A (en) * 2013-09-05 2013-12-18 常州大学 Downhole booster

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