CN109025821B

CN109025821B - Mixed type high build-up rate rotary steering drilling tool

Info

Publication number: CN109025821B
Application number: CN201810911746.6A
Authority: CN
Inventors: 霍爱清; 汪跃龙; 程为彬
Original assignee: Xian Shiyou University
Current assignee: Xian Shiyou University
Priority date: 2018-08-10
Filing date: 2018-08-10
Publication date: 2020-09-22
Anticipated expiration: 2038-08-10
Also published as: CN109025821A

Abstract

A mixed type high build-up rate rotary steering drilling tool comprises a modulation pushing type steering drilling short section, a hydraulic pushing type steering tool short section and the like; when the valve is used, the turbine torque motor is driven to change the acting torque, so that the upper disc valve is stable or moves; when all the acting moments of the stabilizing platform are balanced, the stabilizing platform is stabilized relatively to the ground, so that mud passing through the lower disc valve and the drilling fluid flow channel pushes the pushing rib plate to extend out at the same position and push against the well wall, and the purpose of deflecting is achieved; the rotary torque of the drill collar is transmitted to the drill bit through the control shaft to drive the drill bit to rotate and crush the rock; the invention has the advantages of realizing the high build-up rate rotary steering drilling tool and high popularization value.

Description

Mixed type high build-up rate rotary steering drilling tool

Technical Field

The invention belongs to the field of petroleum drilling engineering, and particularly relates to a mixed type high build-up rate rotary steering drilling tool.

Background

In order to meet the development requirements of exploration and development of oil and gas resources, particularly ocean oil and gas resources, drilling of special process wells such as ultra-deep wells, highly difficult directional wells, cluster wells, horizontal wells, extended reach wells, branch wells, three-dimensional complex structure wells and the like in complex oil and gas reservoirs in the later period of an oil field, and simultaneously meet the development requirements of closed-loop automatic drilling, a rotary steering drilling tool with a high build slope is urgently needed.

The rotary steering drilling technology can solve the difficult problems in the drilling technology of wells with complex structures such as extended reach wells and the like in the drilling process, reduce the development cost and achieve the purpose of increasing the petroleum yield. The rotary steerable drilling technology is one of the important bases for demonstrating the high and low level of automation technology of drilling engineering in a country or a group.

The rotary steering drilling tool is the core of a rotary steering drilling system, and is divided into four main working modes: static pushing type, static pointing type, dynamic pushing type and dynamic pointing type. The drill bit of the push-type rotary steering drilling tool has large lateral force and high build rate, but the dog leg of a borehole drilled by rotary steering is large, the track fluctuation is large, and the borehole is not smooth. The lateral force of the drill bit of the directional rotary steering downhole tool is small, the build rate is low, but the dogleg of a borehole drilled by the rotary steering is small, and the track is smooth. From the application point of view, the directional type is the development trend of the rotary guiding drilling system. Currently, the more mature rotary steerable drilling tools in foreign countries are most represented by Auto Track series of Baker Hughes, Power Drive series of Schlumberger, and Geo-Pilot series of Halliburton. The autocrack of beckhos is a typical push-type tool, and the "drive shaft-nonrotating sleeve" structure of the tool performs a guiding operation by controlling the magnitude and direction of a resultant force acting on a borehole wall by a thrust block on a nonrotating outer sleeve (see patent documents W02008101020A, US2013256034A, and the like). Typical drill point rotary steerable tools include Geo-Pilot (see patent document W02014055068A) by harebilton, revolute (see patent document W02008120025A) by wedeford, and Power Drive Xceed (see patent document N020061119A) by schlumberger. Wherein Geo-Pilot and Revolition are static directional rotary steering tools, the deflecting capability of the tool is realized by adjusting the offset displacement of the downhole steering tool, and the deflecting capability can be continuously adjusted. The Power Drive Xended of the 'full rotation' structure adopts a fixed guide biasing structure, the build-up rate of the structure is realized by a guide and steady-slope drilling mode which is changed alternately, and the control is carried out by depending on the conduction parameters (a tool face and a guide proportion) under a ground system.

Both push type and directional type have respective advantages and disadvantages, and a single mode structure cannot well meet the drilling requirement of high deflection, so that the combination of the two can effectively avoid the disadvantages of the single mode, and a mixed structure becomes the current trend. The research in this area in China is relatively late, and a high-deflecting rotary steering drilling tool which can be successfully and commercially applied is not developed yet. The dynamic directional rotary steering drilling tool and the measurement and control method thereof (No. CN 104832088B) invented by Gunn peak and the like adopt a double eccentric ring mechanism to carry out deflection, and have complex structure; the invention relates to a full-rotation directional guide tool and a guide method (an authorization notice number 104499940B) invented by Tangxue et al, and provides an improved full-rotation directional guide tool aiming at the defects of a Powerdrive Xended full-rotation directional guide tool of the Schlumberger company; "static directional rotary steerable drilling tool" (grant publication No. CN 104775757B) invented by york et al, the upper part of which is a static structure that does not rotate; the invention discloses a directional rotary steering drilling tool (No. CN 104343389B) invented by Lihongtao and the like, which adopts an integrated hydraulic cylinder to realize the offset of a mandrel so as to perform deflection, and the invention only comprises that a drill bit generates deflection in a directional way; the pushing directional rotary steering drilling device (No. CN 103437704B) of the invention adopts a connecting structure of a stabilizer and a hydraulic system, wherein the stabilizer is a non-rotating device, and only the directional part of a drill bit is used for deflecting.

This patent proposes a rotatory steering drilling tool structure of hybrid high build-up rate, both contains the formula of leaning on and contains directional formula again, and two kinds of structure mixed action provide the powerful assurance for realizing the rotatory steering drilling tool of high build-up rate.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a mixed type high build-up rate rotary steering drilling tool, which comprises a modulation push type and a drill bit pointing type, has the mixed effect of the two structures, provides powerful guarantee for realizing the high build-up rate rotary steering drilling tool, and has high popularization value.

In order to achieve the purpose, the invention adopts the technical scheme that:

a mixed type high build-up rate rotary steering drilling tool comprises a drill collar 17, wherein a stable platform is arranged in the drill collar 17, the stable platform comprises a measurement and control electronic cabin 3, the measurement and control electronic cabin 3 is fixed in the drill collar 17 through an upper support bearing 21 and a lower support bearing 22, the measurement and control electronic cabin 3 is connected with a turbine torque motor 2 and a turbine generator 1 through a control main shaft, an output shaft of the turbine torque motor 2 is connected with an upper disc valve 4, one side of the upper disc valve 4 is provided with a drilling fluid distributor 5, the lower disc valve is positioned on the drilling fluid distributor 5 and is matched with the upper disc valve 4 to be connected with a pushing rib plate 7 through a connecting pipe, the pushing rib plate 7 is arranged outside the drill collar 17, and a drilling fluid main runner 6 is uniformly arranged on; the upper disc valve 4 is connected with a main upper disc valve 9 through a disc valve connecting rod 8, and the disc valve connecting rod 8 penetrates through the drilling fluid distributor 5; a diversion hole is arranged on the main upper disc valve 9, and one side of the main upper disc valve 9 is provided with a hydraulic pushing pointing type tool short section.

The hydraulic pushing pointing type tool nipple comprises a main drilling fluid throttling distributor 10, wherein the main drilling fluid throttling distributor 10 is provided with a plurality of evenly distributed overflowing water holes; the middle of one side of the drilling fluid throttling distributor 10 is connected with a hydraulic pushing cup barrel 11, the hydraulic pushing cup barrel 11 is communicated with a control shaft 13, a lateral overflowing hole 12 is formed in the control shaft 13, the control shaft 13 is fixed in a drill collar 17 through a universal joint 14, and the end of the control shaft 13 is connected with a drill bit 16.

The diversion hole on the main upper disc valve 9 is crescent-shaped.

The hydraulic pushing cup barrel 11 is in a circular cup shape.

The control shaft 13 penetrates through the flexible reducing joint 15, the control shaft 13 is connected with the flexible reducing joint 15 through internal threads 18, the flexible reducing joint 15 is connected with the inner layer of a drill collar 17 through external threads 19, and the control shaft 13 is connected with a drill bit 16 through threads 20.

The upper end of the drill collar 17 is provided with a centralizer.

The invention has the beneficial effects that:

the invention adopts the turbine torque motor 2 to change the acting torque, so that the upper disc valve 4 is stable or moves; when all the acting moments of the stable platform are balanced, the stable platform is stabilized (does not rotate) relatively to the ground, so that mud passing through the lower disc valve and the drilling fluid flow channel 6 pushes the pushing rib plates 7 to extend out at the same position and push against the well wall, and the purpose of deflecting is achieved; the rotary torque of the drill collar 17 is transmitted to the drill bit 16 through the control shaft 13, and the drill bit 16 is driven to rotate to crush the rock.

Drawings

Fig. 1 is a schematic structural view of the present invention.

FIG. 2 is a schematic view of the drill collar, flexible reducing short joint, control shaft and drill bit of the present invention.

FIG. 3 is a cross-sectional view of the hydraulic thrust cup force of the present invention.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

Referring to fig. 1, the hybrid high build-up rate rotary steering drilling tool comprises a drill collar 17, wherein a centralizer is arranged at the upper end of the drill collar 17, a stable platform is arranged in the drill collar 17, the stable platform comprises a measurement and control electronic cabin 3, the measurement and control electronic cabin 3 is fixed in the drill collar 17 through an upper support bearing 21 and a lower support bearing 22, the measurement and control electronic cabin 3 is connected with a turbine torque motor 2 and a turbine generator 1 through a control main shaft, an output shaft of the turbine torque motor 2 is connected with an upper disc valve 4, one side of the upper disc valve 4 is provided with a drilling fluid distributor 5, a lower disc valve matched with the upper disc valve 4 on the drilling fluid distributor 5 is connected with a pushing rib plate 7 through a connecting pipe, the pushing rib plate 7 is arranged outside the drill collar 17, and main flow passages 6 are uniformly arranged on the drilling; the upper disc valve 4 is connected with a main upper disc valve 9 through a disc valve connecting rod 8, and the disc valve connecting rod 8 penetrates through the drilling fluid distributor 5; a diversion hole is arranged on the main upper disc valve 9, and one side of the main upper disc valve 9 is provided with a hydraulic pushing pointing type tool short section.

Referring to FIG. 2, the control shaft 13 passes through the flexible reducer union 15, the control shaft 13 is connected with the flexible reducer union 15 through internal threads 18, the flexible reducer union 15 is connected with an inner layer of a drill collar 17 through external threads 19, and the control shaft 13 is connected with a drill bit 16 through threads 20.

Referring to fig. 3, the hydraulic pushing cup 11 is in a circular cup shape, and when the main upper disc valve 9 keeps a fixed angle, the jet impact force generated by the hydraulic pushing cup 11 is always kept at a fixed position.

The working principle of the invention is as follows:

when the device is used, a power source of the stable platform is provided by the upper turbine generator 1, the measurement and control electronic cabin 3 finishes the acquisition and processing of near-bit information and generates a corresponding control signal, so that the turbine torque motor 2 is driven to change the acting torque, and the upper disc valve 4 connected with a control shaft of the stable platform is enabled to be stable or move; when all the acting moments of the stable platform are balanced, the stable platform is stabilized (does not rotate) relatively to the ground, so that mud passing through the drilling fluid distributor 5 and the drilling fluid flow channel 6 pushes the pushing rib plates 7 to extend out at the same position and push against the well wall, and the purpose of deflecting is achieved; the drill bit 16 is connected with the flexible reducing joint 15, the drill bit 16 is connected with the control shaft 13 through threads 20, deflects and rotates along with the control shaft 13, and is communicated with a drilling fluid flow passage of the control shaft; the flexible reducing joint 15 is connected with a drill collar 17 through an external thread 19 and is connected with the control shaft 13 through an internal thread 18, so that the rotating torque of the drill collar 17 is transmitted to the drill bit 16 through the control shaft 13 to drive the drill bit 16 to rotate and crush rock; the flexible reducer union 15 is flexibly deformable to accommodate deflection of the control shaft 13 when the control shaft is deflected 13.

The main upper disc valve 9 is coupled to the stabilized platform by a disc valve linkage 8, moves with the stabilized platform or is stationary relative to the ground. The main upper disc valve 9 is a disc, and is provided with a crescent flow guide hole. The main drilling fluid throttling distributor 10 is matched with the main upper disc valve 9, and a plurality of evenly distributed overflowing water holes are formed in the main drilling fluid throttling distributor 10. The hydraulic pushing cup barrel 11 is in a circular cup shape. When the overflowing port is communicated with the flow guide hole of the main upper disc valve, drilling fluid flows into the overflowing port channel and is sprayed out by the jet nozzle, and the impact force of the jet flow is formed by pushing the cup barrel 11 against the impact water power, so that the control shaft 13 deflects, and the guiding force (deflecting force) is formed. When the main upper disk valve 9 keeps a fixed angle, the jet impact force generated by the hydraulic pushing cup 11 is always kept at a fixed position, so that the axial lead of the control shaft 13 keeps a state of deviating from the central line of the drill collar 17, the control shaft 13 drives the drill bit 16 through the universal joint 14, and the drill bit 16 always obliquely cuts a well wall at the same angle position, and the cumulative effect is that a well bore with certain inclination increment can be caused and drilling is 'increasing inclination' or 'deflecting'; when the main upper disc valve 9 rotates at a constant speed relative to the ground, all parts of the drill bit 16 uniformly and obliquely cut the well wall, the cumulative effect is to keep the center of the well stable, but the hole expanding effect is a certain effect, and the drilling is 'steady-oblique'.

Claims

1. A mixed type high build-up rate rotary steering drilling tool comprises a drill collar (17), and is characterized in that a stable platform is arranged in the drill collar (17), the stable platform comprises a measurement and control electronic cabin (3), the measurement and control electronic cabin (3) is fixed in a drill collar (17) through an upper supporting bearing (21) and a lower supporting bearing (22), the measurement and control electronic cabin (3) is connected with a turbine torque motor (2) and a turbine generator (1) through a control main shaft, an output shaft of the turbine torque motor (2) is connected with an upper disc valve (4), one side of the upper disc valve (4) is provided with a drilling fluid distributor (5), the lower disc valve is positioned on the drilling fluid distributor (5), the lower disc valve is matched with the upper disc valve (4) and is connected with a pushing rib plate (7) through a connecting pipe, the pushing rib plate (7) is arranged outside the drill collar (17), and a drilling fluid main flow passage (6) is uniformly arranged on the drilling fluid distributor (5; the upper disc valve (4) is connected with a main upper disc valve (9) through a disc valve connecting rod (8), and the disc valve connecting rod (8) penetrates through the drilling fluid distributor (5); a diversion hole is formed in the main upper disc valve (9), and a hydraulic pushing pointing type tool nipple is arranged on one side of the main upper disc valve (9);

the hydraulic pushing pointing type tool short section comprises a main drilling fluid throttling distributor (10), and the main drilling fluid throttling distributor (10) is provided with a plurality of uniformly distributed overflowing water holes; the middle of one side of the main drilling fluid throttling distributor (10) is connected with a hydraulic pushing cup barrel (11), the hydraulic pushing cup barrel (11) is communicated with a control shaft (13), a lateral overflowing hole (12) is formed in the control shaft (13), the control shaft (13) is fixed in a drill collar (17) through a universal joint (14), and the end of the control shaft (13) is connected with a drill bit (16).

2. The hybrid high build rate rotary steerable drilling tool as recited in claim 1, wherein the hydraulically pushing sleeve (11) is in the shape of a circular cup.

3. The hybrid high build rate rotary steerable drilling tool according to claim 1, wherein the control shaft (13) passes through the flexible reducer (15), the control shaft (13) is connected to the flexible reducer (15) via internal threads (18), the flexible reducer (15) is connected to the inner layer of the drill collar (17) via external threads (19), and the control shaft (13) is connected to the drill bit (16) via threads (20).

4. The hybrid high build rate rotary steerable drilling tool as in claim 1, wherein the deflector orifice of the main upper disc valve (9) is crescent shaped.

5. The hybrid high build-up rate rotary steerable drilling tool as recited in claim 1, wherein the upper end of the drill collar (17) is provided with a centralizer.