CN2473326Y

CN2473326Y - Modulating type bias guide tool

Info

Publication number: CN2473326Y
Application number: CN 01216540
Authority: CN
Inventors: 韩来聚; 孙铭新; 刘新华; 唐志军; 冯光通
Original assignee: DRILLING TECHNOLOGY INST SHENGLI PETROLEUM ADMINISTRATION
Current assignee: DRILLING TECHNOLOGY INST SHENGLI PETROLEUM ADMINISTRATION
Priority date: 2001-02-23
Filing date: 2001-02-23
Publication date: 2002-01-23
Anticipated expiration: 2011-02-23

Abstract

The utility model provides a close-loop automatic guide drilling tool for the oil drilling field, which uses the drilling hydraulic difference that naturally exits in the drilling process as the drive source of the whole system, using a laterality mechanism forms a stable controlling platform, to control the flowing direction of the drilling liquid, so as to control the action of the whole system; therefore, the utility model is simple in structure and practical, at the same time, the electricity consumption is greatly decreased. Using the utility model with the apparatus such as measurement while drilling, well logging while drilling, formation evaluation logging while drilling, which can reach the highest stage of the drilling technology up to now, and is the down-hole close-loop automatic guide drilling.

Description

A kind of modulation type offset leading tool

The utility model belongs to petroleum exploration and development closed loop automatic guide drilling well downhole tool.

Along with most of oil field in the world enters development late stage, the oil reservoir development difficulty is increasing, and special wells such as directional well, horizontal well, extended reach well, designer's well have become the main development tool that adapts to this exploitation situation demand.A job of the most critical in the construction of this class well is led to well exactly, promptly controls well and creeps into by hole deviation, the orientation of design.

The traditional direction mode is to adopt curved shell down-hole motor to creep into sliding type, and there is following major defect in it:

1. hole trajectory control low precision;

2. owing to be to adopt sliding type to creep into, make and creep into limit well depth and be restricted;

3. well is not slick and sly, and mill resistance, moment of torsion are increased;

4. wellbore quality and borehole status are not good, are prone to the down-hole complex accident;

5. increased the drilling number of times, reduced rate of penetration, drilling cost is risen greatly.

For solving the hole trajectory control low precision that the traditional direction mode exists, poor hole quality, the drilling well down-hole accident is many, the drilling cost height, and creep into the restricted problem of limit well depth, to satisfy latter period of oilfield development, special wells such as a large amount of directional wells, horizontal well, extended reach well, designer's well, become the demand of this exploitation situation of main means of oil and gas development gradually, at the end of the eighties, closed loop automatic guide drilling technology occurs.After entering the nineties, this technology has obtained developing rapidly, the mid-90, external existing several rotational automatic guidance system successes of the test also drop into field popularization application, and obtained good effect, as the automatic well system of rotation closed loop of Baker Hughes Inc with based on the automatic well system of rotation closed loop of the Schlumberger company of United States Patent (USP): US005520255 is exactly to use ripe several closed loop automatic guide well systems.The utility model is for satisfying a kind of modulation type offset leading tool that the oil and gas development needs design.

It is compared with the traditional direction mode, has the following advantages:

1. the hole trajectory control precision is higher than the traditional direction mode;

2. creep into owing to adopting rotation mode to lead, drilling well limit well depth is improved greatly;

3. well slyness, the well that mill resistance, moment of torsion creep into far below the traditional direction mode;

4. wellbore quality and borehole status are better than the well that the traditional direction mode is crept into, and fall greatly

Low down-hole complex accident odds;

5. reduced the number of times that makes a trip, improved rate of penetration, drilling cost is reduced greatly.

Compare with the automatic well system of rotation closed loop of Baker Hughes Inc, the utility model has omitted complicated hydraulic system, and utilize in the drilling process drilling fluid pressure reduction that exists naturally power source as whole system, control the action of whole system by controlling a solenoid operated directional valve, make the utility model simple in structure, power consumption reduces greatly, therefore, solve system's spontaneous heating problem, and prolonged the underground work time; Simultaneously, control system can directly receive the surface instruction that changes transmission by drilling liquid pressure by pressure sensor, has solved the instruction transmission communication problem of very difficult solution in simple mode; Compare with the automatic well system of rotation closed loop (US005520255) of Schlumberger company, the utility model has omitted complicated stabilized platform control system, and the stability of measure and control device is controlled in the action of gravity that utilizes eccentric hammer, thereby simplified its structure greatly, improved its functional reliability.With itself and measurement while drilling, well logging during, with boring instrument fit applications such as formation evaluation well logging, can realize the rotational automatic steerable drilling of downhole closed loop.

The utility model is achieved in that laying particular stress on mechanism [3] is connected with the inwall of no magnetic urceolus [5] by bearing [2], [7]; Lay particular stress on mechanism [3] inside measure and control device [4] is installed, connecing an end installing angle controlling organization [6] of drill bit, the other end is installed both-way communication device [1]; Corner controlling organization [6] is connected with measure and control device [4] by control circuit [18] respectively with both-way communication device [1]; Last control axle [8] by corner controlling organization [6] with lay particular stress on mechanism [3] and be connected, and by control axle adapter [9] with control axle [10] down and be connected; Control down on the control moushroom valve [13] that axle [10] is fixed in moushroom valve controlling organization [20]; The pressure release moushroom valve [11] of moushroom valve controlling organization [20] is fixed in the inwall of biasing pipe nipple [19], and the barrel that its relief hole [12] passes biasing pipe nipple [19] leads to biasing pipe nipple [19] outside; The water conservancy diversion moushroom valve [14] of moushroom valve controlling organization [20] is fixed in the inwall of biasing pipe nipple [19], and its pod apertures [16] is connected with the support rib hydraulic cavities [21] of the support rib of controlling separately [15] respectively.

Figure of description: accompanying drawing 1, a kind of modulation type offset leading tool schematic diagram

Description of drawings:

1 both-way communication device, 2 bearings

3 lay particular stress on mechanism's 4 measure and control devices

5 no magnetic urceolus 6 corner controlling organizations

Control axle on 7 bearings 8

10 times control of 9 control axle adapters axle

11 pressure release moushroom valves, 12 relief holes

13 control moushroom valves, 14 water conservancy diversion moushroom valves

15 support rib 16 pod apertures

17 connect drill bit screw thread 18 control circuits

19 biasing pipe nipples, 20 moushroom valve controlling organizations

21 support the rib hydraulic cavities

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

The utility model is received drill bit top, be lowered in the well of certain hole deviation, laying particular stress on mechanism [3] will be under the effect of gravity, is independent of rotating in a circumferential direction of drill string and is in metastable state.

By measure and control device [4] according to result to the analysis of metrical information, explanation, contrast, or according to the surface instruction that has both-way communication device [1] to come by control circuit [18] transmission, send control instruction by control circuit [18] to corner controlling organization [6], control it and remain on a certain angle by command request, make control moushroom valve [13] by on control axle [8], control axle adapter [9] and control down under the effect of the Control Shaft mechanism that axle [10] forms, be independent of the rotation of drill string and relatively stable in a certain position; Like this, along with the rotation of drill string, each supports the support rib hydraulic cavities [21] of rib [15] and coupled pod apertures [16] will distinguish successively pressure hole and the connection of low pressure hole with control moushroom valve [13]; When connecting with pressure hole, high pressure drilling liquid enters the support rib hydraulic cavities [21] of this support rib [15] by pod apertures [16], to support rib [15] and be supported in the borehole wall, the reaction force of the borehole wall makes drill bit lead by design direction for drill bit provides a lateral force; When drill string rotates to an angle again, this passageway shuts off, supporting rib hydraulic cavities [21] and pod apertures [16] will connect with relief hole [12], support the high pressure drilling liquid that stores in rib hydraulic cavities [21] and the pod apertures [16] and will enter the low pressure annular space of drill string outside by relief hole [12], release pressure, make and support rib [15] withdrawal; Like this, drill string whenever rotates a circle, and each on it supports rib [15] and will when drill string is rotated further, supports rib [15] and will regain again, thereby realize guide effect in the pre-position expenditure by corner controlling organization [6] control.

The utility model has omitted complicated hydraulic system, and utilize in the drilling process drilling fluid pressure reduction that exists naturally power source as whole system, control the action of whole system by controlling a solenoid operated directional valve, the utility model is compared with external existing offset guiding tool, have simple in structure, the characteristics that power consumption is low, therefore, solve system's spontaneous heating problem, and prolonged the underground work time; Simultaneously, the utility model has omitted complicated stabilized platform control system, and utilizes the action of gravity of eccentric hammer to control the stability of measure and control device, thereby has simplified its structure greatly, has improved its functional reliability.With itself and measurement while drilling, well logging during, with boring instrument fit applications such as formation evaluation well logging, can realize the rotational automatic steerable drilling of downhole closed loop.

Claims

1. modulation type offset leading tool is characterized in that: biasing mechanism [3] is connected with the inwall of no magnetic urceolus [5] by bearing [2], [7]; Biasing mechanism [3] inside is equipped with measure and control device [4], is connecing an end installing angle controlling organization [6] of drill bit, and the other end is installed both-way communication device [1]; Corner controlling organization [6] is connected with measure and control device [4] by control circuit [18] respectively with both-way communication device [1]; Last control axle [8] is connected with biasing mechanism [3] by corner controlling organization [6], and is connected with following control axle [10] by control axle adapter [9]; Controlling axle [10)] down is fixed on the control moushroom valve [13] of moushroom valve controlling organization [20].

2. a kind of modulation type offset leading tool according to claim 1, it is characterized by: the pressure release moushroom valve [11] of moushroom valve controlling organization [20] is fixed in the inwall of biasing pipe nipple [19], and the barrel that its relief hole [12] passes biasing pipe nipple [19] leads to biasing pipe nipple [19] outside; The control moushroom valve [13] of moushroom valve controlling organization [20] is fixed in down control axle [10], and by control axle [10] down, control axle adapter [9], on control axle [8], corner controlling organization [6] and be connected with biasing mechanism [3]; The water conservancy diversion moushroom valve [14] of moushroom valve controlling organization [20] is fixed in the inwall of biasing pipe nipple [19], and its pod apertures [16] is connected with the support rib hydraulic cavities [21] of the support rib of controlling separately [15] respectively.