CN201053295Y

CN201053295Y - Slide pushing type guiding drilling tool

Info

Publication number: CN201053295Y
Application number: CNU2007200214627U
Authority: CN
Inventors: 倪红坚
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-04-26
Filing date: 2007-04-26
Publication date: 2008-04-30
Anticipated expiration: 2017-04-26

Abstract

The utility model provides a sliding backup type steering drilling tool, comprising a crossover coupling, a sliding bush, a stopper, a guide piston, a stable piston and a mandrel. The utility model is characterized in that: a flow passage is processed along the axes of the mandrel; the upper part is processed with a stopper groove, and the middle part is processed with a pressure guiding hole; a bearing is sleeved with the sliding bush and the mandrel are arranged in sequence, and then the crossover coupling is connected to the upper end of the mandrel; a piston cylinder is evenly processed around the axes of the middle part of the sliding bush body; the diameter of the guide piston is larger than that of the stable piston; a stopper hole going radially is processed on the sliding bush body, and the stopper is arranged inside the stopper and extended into the stopper groove on the upper part of the mandrel. The principle of work of the sliding backup type steering drilling tool is to adopt the differential pressure caused by the circulation of drilling fluid inside and outside a drilling string to push the piston with different diameters to be close to the drill wall, and when the drill head rotates and drills into the rock, a continuous lateral resultant force is applied to the drill head. Moreover, the adjustment and control of the track of borehole are realized by adjusting the position of piston to push the drill wall.

Description

Sliding push-the-bit type steering drilling tool

Technical field

The utility model belongs to the corollary apparatus of oil, gas drilling.

Background technology

The basic goal of drilling well is to adopt the rock-breaking and well-drilling instrument, and the broken formation rock is formation passage, the i.e. well of exploiting underground resources.Therefore, the quality of hole quality is directly connected to the success or failure of subterranean resource exploitation and the height of efficient, also just must control down-hole processes such as rock-breaking and well-drilling, extension wells.

Hole trajectory control is an extremely important aspect in the process control technology of down-hole, is meant well is led, and the control well is extended to predetermined stratum target by hole deviation, the orientation of design.Modern drilling engineering has formed the instrument and the technology of various control well track in the process of development, may be summarized to be following several substantially:

One, adopt rotating disk to bore drilling assembly, promptly utilize experience and mechanical analysis, the design bottom hole assemblies reaches the purpose of controlling hole deviation.The disadvantage of this method is that drop angle efficient is lower, rate of penetration is slow, for example be used for the pendulum combination requirement " the light pressure hung up and beaten " that the straight well well straightening is used, this is actually a kind of and exchanges quality for to sacrifice bit speed, negative means with wellbore quality and economic benefit have opposed is unfavorable for controlling drilling cost.

Two, adopt curved shell mud motor to creep into.This mode control accuracy is not high, and difficulty of construction is big, and drill fluid purification is required height, and the well track of formation is rough, and hole quality is difficult to guarantee, easily causes down hole problem, causes prolong well construction period, and drilling cost increases.

Three, the well system of the automated closed-loop of development abroad control in recent years.For example the VDS of vertical drilling system, Schlumberger Oilfield Service company have been developed in KTB project team and the joint study of German Eastman Teleco company

The SSD of vertical drilling system that Italy Agip company and U.S. Baker Hushes INTEQ company develop jointly etc.Because the automated closed-loop NDS is the high-tech product of mechanical electronic hydraulic integrated, complex structure, very high to the requirement of kit, technology and equipment, the working service cost is high, is difficult to generally promote.

The above analysis, development compliance is strong, reliability is high, and precision satisfies field requirement, can rationally take into account the drilling tool of " economy " and " efficient ", is an important directions of control Technology for Borehole Trajectory development.

Summary of the invention

The utility model to be economical for realizing just, Controlling Borehole Trajectory efficiently, improving drilling efficiency and wellbore quality designs, its principle is the pressure reduction that utilizes circulation of drilling fluid to form inside and outside drill string, promote the different piston of diameter and rely on the borehole wall, drill bit is applied continuous resulting side force, and by adjusting the position of the piston backup borehole wall, the control well is extended by hole deviation, the orientation of design, and the purpose of this utility model provides a kind of sliding push-the-bit type steering drilling tool for the scene exactly.

The utility model is achieved like this, it comprises crossover sub, sliding sleeve, locked cock, guide piston, stable plunger and axle, axle is stepped, be processed with runner along the axle center, top is processed with the locked cock groove, the middle part is processed with pressure guide hole, with bearing and sliding sleeve that is hollow cylindrical and axle order suit, then crossover sub is connected in the axle upper end, sliding sleeve body middle part evenly is processed with piston rod around its axis, with guide piston and guide piston cylinder sleeve, after stable plunger and stable plunger cylinder sleeve are equipped, the integral body piston rod of packing into, and compress with briquetting, briquetting is fixed on the sliding sleeve body, top at piston rod, be processed with the locked cock hole that radially connects on the sliding sleeve body, locked cock and spring are packed into wherein in proper order, locked cock stretches in the locked cock groove on axle top, with baffle plate shutoff locked cock hole, the diameter of guide piston is greater than the diameter of stable plunger, the internal diameter of guide piston cylinder sleeve is greater than the internal diameter of stable plunger cylinder sleeve, the sliding sleeve Surface Machining has runner, be processed with through hole on the baffle plate, axle lower end and drill bit link, the crossover sub upper end links with drill string, axle and sliding sleeve inwall, locked cock hole and locked cock, guide piston and guide piston cylinder sleeve, stable plunger and stable plunger cylinder sleeve, guide piston cylinder sleeve and piston rod, stable plunger cylinder sleeve and piston rod adopt and are sealed and matched, the pressure reduction that circulation of drilling fluid forms inside and outside drill string is passed to stable plunger through pressure guide hole, guide piston and locked cock, under the effect of this pressure reduction, locked cock compression spring is radially outer to be moved, the locked cock groove that breaks away from axle top, and stable plunger, guide piston is then radially overhanging under the effect of this pressure reduction, the backup borehole wall, rely on stable plunger, frictional force between the guide piston and the borehole wall, slide in the process of creeping into and only slide along the borehole wall, and do not rotate with axle and drill string, because the diameter of guide piston is greater than the diameter of stable plunger, under the effect of same pressure reduction, the reaction force that the guide piston backup borehole wall produces is greater than stable plunger, therefore, when drill bit rotates broken rock and creeps under the drive of axle, being subjected to one is produced by guide piston and the stable plunger backup borehole wall, point to the resulting side force of axle axis along the guide piston axis, when needs are adjusted the action direction of this resulting side force, stop circulation of drilling fluid earlier, disappeared by the pressure reduction that circulation of drilling fluid forms inside and outside drill string this moment, locked cock is under the effect of compression spring restoring force, radially interior moving, enter the locked cock groove on axle top, rotary drill column then, drive axle and stir locked cock, stirring sliding sleeve by locked cock again rotates with axle, by adjusting the position of the guide piston and the stable plunger backup borehole wall, can adjust the action direction of resulting side force, realization is to the regulation and control of well track, and the size of resulting side force is by adjusting property of drilling fluid, the parameters such as diameter of guide piston and stable plunger obtain.

The utility model is based on the prior art analysis, the pressure reduction that utilizes circulation of drilling fluid inside and outside drill string, to form, promote the different piston of diameter and rely on the borehole wall, when the broken rock of drill bit rotation creeps into, it is applied a continuous resulting side force, realization is to the regulation and control of well track, the utlity model has simple in structure, reliable operation, controllability height, compliance is strong and the stressed characteristics such as rationally of drilling tool, can effectively improve drilling efficiency and wellbore quality, reduce production costs, have boundless The field prospect.

Description of drawings

Fig. 1 sliding push-the-bit type steering drilling tool schematic diagram

Fig. 2 is that the A-A of Fig. 1 is to sectional view

1. crossover sub; 2. bearing; 3. sliding sleeve; 4. locked cock groove; 5. locked cock; 6. locked cock hole; 7. spring; 8. baffle plate; 9. briquetting; 10. pressure guide hole; 11. guide piston; 12. guide piston cylinder sleeve; 13. piston rod; 14. axle; 15. stable plunger cylinder sleeve; 16. stable plunger

The specific embodiment

Now utility model is further described in conjunction with Figure of description.

When adopting the utility model to carry out the steerable drilling construction, axle [14] is stepped, be processed with runner along the axle center, top is processed with locked cock groove [4], the middle part is processed with pressure guide hole [10], with bearing [2] and sliding sleeve [3] that is hollow cylindrical and axle [14] order suit, then crossover sub [1] is connected in axle [14] upper end, sliding sleeve [3] body middle part evenly is processed with piston rod [13] around its axis, with guide piston [11] and guide piston cylinder sleeve [12], after stable plunger [16] is equipped with stable plunger cylinder sleeve [15], the integral body piston rod [13] of packing into, and compress with briquetting [9], briquetting [9] is fixed on sliding sleeve [3] body, top in piston rod [13], be processed with the locked cock hole [6] that radially connects on sliding sleeve [3] body, locked cock [5] and spring [7] order are packed into wherein, locked cock [5] stretches in the locked cock groove [4] on axle [14] top, with baffle plate [8] shutoff locked cock hole [6], the diameter of guide piston [11] is greater than the diameter of stable plunger [16], the internal diameter of guide piston cylinder sleeve [12] is greater than the internal diameter of stable plunger cylinder sleeve [15], sliding sleeve [3] Surface Machining has runner, baffle plate is processed with through hole on [8], axle [14] lower end and drill bit link, crossover sub [1] upper end links with drill string, axle [14] and sliding sleeve [3] inwall, locked cock hole [6] and locked cock [5], guide piston [11] and guide piston cylinder sleeve [12], stable plunger [16] and stable plunger cylinder sleeve [15], guide piston cylinder sleeve [12] and piston rod [13], stable plunger cylinder sleeve [15] adopts with piston rod [13] and is sealed and matched.

When adopting the utility model to carry out the steerable drilling construction, the pressure reduction that circulation of drilling fluid forms inside and outside drill string is passed to stable plunger [16] through pressure guide hole [10], guide piston [11] and locked cock [5], under the effect of this pressure reduction, locked cock [5] compression spring [7] is radially outer to be moved, the locked cock groove [4] that breaks away from axle [14] top, and stable plunger [16], guide piston [11] is then radially overhanging under the effect of this pressure reduction, the backup borehole wall, rely on stable plunger [16], frictional force between the guide piston [11] and the borehole wall, sliding sleeve [3] only slides along the borehole wall in the process of creeping into, and do not rotate with axle [14] and drill string, because the diameter of guide piston [11] is greater than the diameter of stable plunger [16], under the effect of same pressure reduction, the reaction force that guide piston [11] the backup borehole wall produces is greater than stable plunger [16], therefore, when drill bit rotates broken rock and creeps under the drive of axle [14], being subjected to one is produced by guide piston [11] and stable plunger [16] the backup borehole wall, resulting side force along guide piston [11] orientation of its axis axle [14] axis, when needs are adjusted the action direction of this resulting side force, stop circulation of drilling fluid earlier, disappeared by the pressure reduction that circulation of drilling fluid forms inside and outside drill string this moment, locked cock [5] is under the effect of compression spring [7] restoring force, radially interior moving, enter the locked cock groove [4] on axle [14] top, rotary drill column then, drive axle [14] and stir locked cock [5], stirring sliding sleeve [3] by locked cock [5] again rotates with axle [14], by adjusting the position of the guide piston [11] and stable plunger [16] the backup borehole wall, can adjust the action direction of resulting side force, realization is to the regulation and control of well track, and the size of resulting side force is by adjusting property of drilling fluid, the parameters such as diameter of guide piston [11] and stable plunger [16] obtain.

Claims

1. sliding push-the-bit type steering drilling tool, it comprises crossover sub, sliding sleeve, locked cock, guide piston, stable plunger and axle, it is characterized in that axle [14] is stepped, be processed with runner along the axle center, top is processed with locked cock groove [4], the middle part is processed with pressure guide hole [10], with bearing [2] and sliding sleeve [3] that is hollow cylindrical and axle [14] order suit, then crossover sub [1] is connected in axle [14] upper end, sliding sleeve [3] body middle part evenly is processed with piston rod [13] around its axis, with guide piston [11] and guide piston cylinder sleeve [12], after stable plunger [16] is equipped with stable plunger cylinder sleeve [15], the integral body piston rod [13] of packing into, and compress with briquetting [9], briquetting [9] is fixed on sliding sleeve [3] body, top in piston rod [13], be processed with the locked cock hole [6] that radially connects on sliding sleeve [3] body, locked cock [5] and spring [7] order are packed into wherein, locked cock [5] stretches in the locked cock groove [4] on axle [14] top, with baffle plate [8] shutoff locked cock hole [6], the diameter of guide piston [11] is greater than the diameter of stable plunger [16], and the internal diameter of guide piston cylinder sleeve [12] is greater than the internal diameter of stable plunger cylinder sleeve [15].

2. sliding push-the-bit type steering drilling tool according to claim 1, it is characterized in that sliding sleeve [3] Surface Machining has runner, baffle plate is processed with through hole on [8], axle [14] lower end and drill bit link, crossover sub [1] upper end links with drill string, and axle [14] adopts with piston rod [13] with piston rod [13], stable plunger cylinder sleeve [15] with stable plunger cylinder sleeve [15], guide piston cylinder sleeve [12] with guide piston cylinder sleeve [12], stable plunger [16] with locked cock [5], guide piston [11] with sliding sleeve [3] inwall, locked cock hole [6] and is sealed and matched.