CN2747355Y

CN2747355Y - Drill for well wall

Info

Publication number: CN2747355Y
Application number: CN 200420096900
Authority: CN
Inventors: 倪红坚; 韩来聚; 李作会; 王敏生
Original assignee: Drilling Technology Research Institute of Sinopec Shengli Petroleum Administration Bureau
Current assignee: Drilling Technology Research Institute of Sinopec Shengli Petroleum Administration Bureau
Priority date: 2004-10-22
Filing date: 2004-10-22
Publication date: 2005-12-21
Anticipated expiration: 2014-10-22

Abstract

The utility model discloses a drill for well wall, composed of an inner cylinder, an outer cylinder, a flexible shaft, a stator, a rotor, a concave bit, a deflector, etc. The principle is that the rotor is driven by means of the waterpower energy. The hollow flexible shaft connected with the concave bit is driven. The advancing direction of the flexible shaft is adjusted through the deflector. The casing tube, the cement ring and the formation are in turn drilled, forming a deep eyelet which passes through the formation and the contaminated zone. The drill for well wall does not shock the casing tube and the cement ring and does not injure the formation. The speed of drilling hole is rapid. The depth of the hole is great. The utility model has the advantages of simple structure, reliable operation, etc. and has broad application prospect on site.

Description

A kind of borehole wall drilling equipment

Technical field

The utility model belongs to the corollary apparatus of oil and gas well drilling, completion and oil recovery.

Technical background

For keeping wellbore stability, the different strata pressure system of packing, generally the method for Cai Yonging is to be lowered to sleeve pipe in well, injects cement then and carry out sealing in the annular clearance on sleeve pipe and stratum.So just bring a problem, how to set up the passage of linking up pit shaft and stratum, realize the extraction or the injection of fluids such as oil gas.What address this problem generally use at present is the jet perforating technology, existing considerable time appears in this technology, have be easy to realize, the characteristics of simple and convenient operation and maintenance, but its also exist perforating depth limited, sleeve pipe and cement sheath are produced impact damage, influences the oil well life-span, significantly reduce hole wall inherent shortcoming such as rock permeability on every side.For overcoming the deficiency of jet perforating technology, domestic and international project technician has carried out a large amount of research, also formed " water jet deep penetrating perforating ", " abrasive perforating ", " bullet perforating " reaches multiple technologies means such as " laser perforations ", but the technology that is developed is owing to exist poor work stability (as the water jet deep penetrating perforating), cost height (as the laser perforation), accommodation limited (as bullet perforating and abrasive perforating) etc. not enough, fail really to replace jet perforating always, become the technology that is widely used.Therefore, how under the situation that does not influence oil well life-span and in-place permeability, setting up the field demand of linking up big depth channel between pit shaft and the stratum and the contradiction between the prior art and still exist, also is the important techniques developing direction in oil and gas development field.

Summary of the invention

The utility model is just for to be implemented under the situation that does not influence oil well life-span and in-place permeability, setting up the purpose of linking up big depth channel between pit shaft and the stratum designs, its principle is to utilize hydraulic energy to drive rotor, drive is connected with the hollow flexible axle of drill bit, adjust the direction that flexible axle advances through steering gear, order directly drills sleeve pipe, cement sheath, pierce the stratum, formation can be passed through the big degree of depth eyelet in contaminated zone, and the purpose of this utility model provides a kind of borehole wall drilling equipment for the scene exactly.

The utility model is achieved like this, it is by inner core, urceolus, flexible axle, stator, rotor, composition such as drill bit and steering gear, the top and bottom of urceolus link to each other with steering gear with tubing string respectively, be processed with descending slideway and up slideway on the inwall in urceolus stage casing, the descending slideway shape that is in line, up slideway spirality, descending slideway and up slideway smooth linking to each other of head and the tail, stator is fitted in the inner core, rotor is sleeved on the axle of hollow, stator and rotor are installed at interval, with clamp nut rotor axial is fixed, be respectively charged into upper limit cover and lower limit cover in the top and bottom of inner core inside, upper end at the upper limit cover, the inside of inner core is fitted into the throttling dish that is processed with runner, lower end at the lower limit cover, the inside of inner core pack in proper order thrust bearing and inner core lower end cap, the bottom of axle has inflow entrance, the lower end of axle links to each other with the flexible axle of hollow, the upper end of inner tank theca is fixed with the inner core wiper block, the lower end is fixed with the inner core slide block, inner core is contained in the urceolus, the inner core wiper block contacts with outer tube inner wall, the inner core slide block cooperates with descending slideway or up slideway on the outer tube inner wall, flexible axle is passed down through the pipeline that turns in the steering gear, link to each other with drill bit at flexible the tip of the axis, steering gear turn to pipeline by inlet right cylinder section, moving pivot section and smooth being formed by connecting of outlet alignment section order, turn to the exit of pipeline to be processed with the drill bit chamber, the external diameter of flexible axle is less than the internal diameter that turns to pipeline in the steering gear, the external diameter of rotor is less than the internal diameter of inner core, the internal diameter of stator is greater than the external diameter of axle, leave the gap between the end face of stator and rotor, inner core lower end cap and axle, throttling dish and inner core adopt and are sealed and matched, drilling fluid enters in the inner core through the throttling dish, impact stator and rotor, driving shaft and the flexible axle rotation that links to each other with axle, drilling fluid is downward along inner core, inflow entrance through the axle bottom enters in the flexible axle, spray by drill bit, because the area of passage of the runner of throttling dish is less, drilling fluid acts on throttling dish upper surface through out-of-date generation pressure drop, it is descending to form pressure promotion inner core and flexible axle, flexible axle is adjusted direction through steering gear, promote the drill bit broken sleeve pipe that advances, cement sheath and rock, when inner core is descending, the inner core slide block that the inner core lower end is fixed cooperates with the descending slideway on the outer tube inner wall, the restriction inner core rotates, when the inner core slide block arrives the outlet of descending slideway, the boring procedure of drill bit is finished, the inner core slide block changes up slideway over to, inner core is up along up slideway rotation, overcome the pressure that acts on throttling dish upper surface, flexible axle is retracted from the eyelet that is drilled to gradually, be up to descending slideway entrance up to the inner core slide block, up process finishes, change over to descending again, begin new boring procedure, so go round and begin again, can in the stratum, get out a plurality of eyelets, the rotating speed of drill bit is by adjusting mud flow rate, the acquisitions such as structural parameters of stator and rotor, the penetration rate of drill bit is by the different bit cutting structure of design, adjust the channel size of throttling dish and the acquisitions such as physical dimension that turn to pipeline of steering gear, the degree of depth that is drilled to eyelet obtains by the length of adjusting flexible axle.

The utility model is based on the analysis-by-synthesis of prior aries such as jet perforating development, creatively utilize hydraulic energy to drive flexible axle, the rotation of drive drill bit, adjust the direction that flexible axle advances through steering gear, directly drill sleeve pipe, cement sheath, in the stratum, form the eyelet of the big degree of depth, this device have do not impact sleeve pipe and cement sheath, do not injure the stratum, advantages such as penetration rate is fast, depth of pore forming is big, simple in structure, reliable operation, have boundless The field prospect.

Description of drawings

A kind of borehole wall drilling equipment of Fig. 1 schematic diagram

The up slideway of a kind of borehole wall drilling equipment of Fig. 2 and descending slideway schematic diagram

1. throttling dish; 2. clamp nut; 3. rotor; 4. urceolus; The axle; 6. lower limit cover; 7. inner core slide block; 8. inner core lower end cap; 9. flexible axle; 10. steering gear; 11. drill bit chamber; 12. drill bit; 13. inner core wiper block; 14. upper limit cover; 15. stator; 16. inflow entrance; 17. inner core; 18. thrust bearing; 19. inlet right cylinder section; 20. turn to pipeline; 21. moving pivot section; 22. outlet alignment section; 23. descending slideway inlet; 24. descending slideway; 25. up slideway; 26. descending slideway outlet

The specific embodiment

Now the utility model will be further described in conjunction with Figure of description.

When adopting the utility model to carry out borehole wall drilling construction, the top and bottom of urceolus [4] link to each other with steering gear [10] with tubing string respectively, be processed with descending slideway [24] and up slideway [25] on the inwall in urceolus [4] stage casing, descending slideway [24] shape that is in line, up slideway [25] spirality, descending slideway [24] and up slideway [25] smooth linking to each other of head and the tail, stator [15] is fitted in the inner core [17], rotor [3] is sleeved on the axle [5] of hollow, stator [15] and rotor [3] are installed at interval, with clamp nut [2] with rotor [3] axial restraint, the top and bottom inner at inner core [17] are respectively charged into upper limit cover [14] and lower limit cover [6], upper end in upper limit cover [14], the inside of inner core [17] is fitted into the throttling dish [1] that is processed with runner, lower end in lower limit cover [6], the inside of inner core [17] pack in proper order thrust bearing [18] and inner core lower end cap [8], the bottom of axle [5] has inflow entrance [16], the lower end of axle [5] links to each other with the flexible axle [9] of hollow, the upper end of inner core [17] outer wall is fixed with inner core wiper block [13], the lower end is fixed with inner core slide block [7], inner core [17] is contained in the urceolus [4], inner core wiper block [13] contacts with urceolus [4] inwall, inner core slide block [7] cooperates with descending slideway [24] or up slideway [25] on urceolus [4] inwall, flexible axle [9] is passed down through and turns to pipeline [20] in the steering gear [10], end at flexible axle [9] links to each other with drill bit [12], steering gear [10] turn to pipeline [20] by the inlet right cylinder section [19], moving pivot section [21] and smooth being formed by connecting of outlet alignment section [22] order, turn to the exit of pipeline [20] to be processed with drill bit chamber [11], the external diameter of flexible axle [9] is less than the internal diameter that turns to pipeline [20] in the steering gear [10], the external diameter of rotor [3] is less than the internal diameter of inner core [17], the internal diameter of stator [15] is greater than the external diameter of axle [5], leave the gap between the end face of stator [15] and rotor [3], inner core lower end cap [8] and axle [5], throttling dish [1] adopts with inner core [17] and is sealed and matched.

When adopting the utility model to carry out borehole wall drilling construction, drilling fluid is in throttling dish [1] enters inner core [17], impact stator [15] and rotor [3], driving shaft [5] and flexible axle [9] rotation that links to each other with axle [5], drilling fluid is downward along inner core [17], inflow entrance [16] through axle [5] bottom enters in the flexible axle [9], spray by drill bit [12], because the area of passage of the runner of throttling dish [1] is less, drilling fluid acts on throttling dish [1] upper surface through out-of-date generation pressure drop, it is descending to form pressure promotion inner core [17] and flexible axle [9], flexible axle [9] is adjusted direction through steering gear [10], promote drill bit [12] the broken sleeve pipe that advances, cement sheath and rock, when inner core [17] is descending, the inner core slide block [7] that inner core [17] lower end is fixed cooperates with the descending slideway [24] on urceolus [4] inwall, restriction inner core [17] rotates, when inner core slide block [7] arrives descending slideway outlet [26], the boring procedure of drill bit [12] is finished, inner core slide block [7] changes up slideway [25] over to, inner core [17] is up along up slideway [25] rotation, overcome the pressure that acts on throttling dish [1] upper surface, flexible axle [9] is retracted from the eyelet that is drilled to gradually, being up to descending slideway inlet [23] up to inner core slide block [7] locates, up process finishes, change over to descending again, begin new boring procedure, so go round and begin again, can in the stratum, get out a plurality of eyelets, the rotating speed of drill bit [12] is by adjusting mud flow rate, the acquisitions such as structural parameters of stator [15] and rotor [3], the penetration rate of drill bit [12] is by different drill bit [12] cutting structure of design, adjust the channel size of throttling dish [1] and the acquisitions such as physical dimension that turn to pipeline [20] of steering gear [10], the degree of depth that is drilled to eyelet obtains by the length of adjusting flexible axle [9].

Claims

1. borehole wall drilling equipment, it is by inner core, urceolus, flexible axle, stator, rotor, drill bit, compositions such as steering gear, the top and bottom that it is characterized in that urceolus [4] link to each other with steering gear [10] with tubing string respectively, be processed with descending slideway [24] and up slideway [25] on the inwall in urceolus [4] stage casing, descending slideway [24] shape that is in line, up slideway [25] spirality, descending slideway [24] and up slideway [25] smooth linking to each other of head and the tail, stator [15] is fitted in the inner core [17], rotor [3] is sleeved on the axle [5] of hollow, stator [15] and rotor [3] are installed at interval, with clamp nut [2] with rotor [3] axial restraint, the top and bottom inner at inner core [17] are respectively charged into upper limit cover [14] and lower limit cover [6], upper end in upper limit cover [14], the inside of inner core [17] is fitted into the throttling dish [1] that is processed with runner, lower end in lower limit cover [6], the inside of inner core [17] pack in proper order thrust bearing [18] and inner core lower end cap [8], the bottom of axle [5] has inflow entrance [16], the lower end of axle [5] links to each other with the flexible axle [9] of hollow, the upper end of inner core [17] outer wall is fixed with inner core wiper block [13], the lower end is fixed with inner core slide block [7], inner core [17] is contained in the urceolus [4], inner core wiper block [13] contacts with urceolus [4] inwall, inner core slide block [7] cooperates with descending slideway [24] or up slideway [25] on urceolus [4] inwall, flexible axle [9] is passed down through and turns to pipeline [20] in the steering gear [10], end at flexible axle [9] links to each other with drill bit [12], steering gear [10] turn to pipeline [20] by the inlet right cylinder section [19], moving pivot section [21] and smooth being formed by connecting of outlet alignment section [22] order turn to the exit of pipeline [20] to be processed with drill bit chamber [11].

2. a kind of borehole wall drilling equipment according to claim 1, the external diameter that it is characterized in that flexible axle [9] is less than the internal diameter that turns to pipeline [20] in the steering gear [10], the external diameter of rotor [3] is less than the internal diameter of inner core [17], the internal diameter of stator [15] leaves the gap greater than the external diameter of axle [5] between the end face of stator [15] and rotor [3].

3. a kind of borehole wall drilling equipment according to claim 1 is characterized in that inner core lower end cap [8] and axle [5], throttling dish [1] are sealed and matched with inner core [17] employing.