CN110374581A - Superhigh temperature mechanical orienting tool gauge and its design method - Google Patents
Superhigh temperature mechanical orienting tool gauge and its design method Download PDFInfo
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- CN110374581A CN110374581A CN201810329998.8A CN201810329998A CN110374581A CN 110374581 A CN110374581 A CN 110374581A CN 201810329998 A CN201810329998 A CN 201810329998A CN 110374581 A CN110374581 A CN 110374581A
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- 239000004744 fabric Substances 0.000 claims abstract description 12
- 238000005553 drilling Methods 0.000 claims description 25
- 230000008859 change Effects 0.000 claims description 23
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- 238000012806 monitoring device Methods 0.000 claims description 8
- 238000005259 measurement Methods 0.000 description 17
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/02—Determining slope or direction
- E21B47/024—Determining slope or direction of devices in the borehole
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Abstract
The invention discloses a kind of design methods of superhigh temperature mechanical orienting tool gauge, the measuring device is used to measure the downhole orientation tool face azimuth under hyperthermal environments, have shell, be installed on the intracorporal valve body of shell and valve block, and top connection, the design method include: the bottom disc center position setting main throttle orifice in valve body；According to the required precision that drilled strata orients, determine configuration in quantity, size and the cloth hole site of the tap hole of the bottom disc edge of the valve body；The quantity of shape and tap hole based on the bottom disc of valve body determines the shape size of valve block, enable when the valve block due to gravity rotates in the housing when completely block corresponding tap hole.The measuring device is unique mechanical underground tool-face pressure signal transmitting device, and inside is free of electronic component, therefore, not affected by the high temperature, can be realized the orientation construction of superhigh temperature horizontal well.
Description
Technical field
The present invention relates to superhigh temperature directed drilling fields, specifically, being related to the work in superhigh temperature rock mass in directed drilling
Have gauge and its design method.
Background technique
As China's petroleum resources are gradually marched to deep formation, in order to improve well yield, expand oil reservoir contact area,
Ultra-deep well drilling generallys use horizontal well well type.In addition, hot dry rock exploitation has been included in the adjustment of China's energy resource structure
The planning of China's energy development, correlative study tackling key problem work are just gradually unfolded, and 2-3 hot dry rock power generating demonstration is built up in China's plan
Engineering.
Either oil and gas development or hot dry rock exploration is faced with superhigh temperature stratum directional drilling problem, and horizontal well
The key problem of orientation is exactly the accurate measurement of directional orientation tool face angle, it is therefore necessary to superhigh temperature horizontal well directional orientation tool face
Angular measurement is studied, and provides technical support for superhigh temperature horizontal well directed drilling.
Summary of the invention
The first technical problem to be solved by the present invention is to need to provide a kind of superhigh temperature mechanical orienting tool planar survey
The design method of device, the measuring device are used to measure the downhole orientation tool face azimuth under hyperthermal environments, have shell
Body is installed on the intracorporal valve body of the shell and valve block, and the valve body and valve block is pressed on the intracorporal top connection of shell, institute
Stating design method includes: the bottom disc center position setting main throttle orifice in the valve body；According to drilled strata orientation
Required precision determines configuration in quantity, size and the cloth hole site of the tap hole of the bottom disc edge of the valve body；Base
The shape size of the valve block is determined in the shape of the bottom disc of the valve body and the quantity of tap hole, so that working as the valve
Block is due to can completely block corresponding tap hole when gravity rotates in the shell.
Preferably, the quantity of the tap hole of the valve body is determined as follows: allowing to miss according to Specific construction engineering
The size of difference, the bottom disc for calculating valve body divide number；The shunting of the valve body is determined based on the division number being calculated
The quantity in hole.
Preferably, the quantity of tap hole is calculated according to following expression:
Wherein, n indicates the quantity of tap hole, and m indicates that the bottom disc of valve body divides number,Wherein,Indicate the size of Specific construction engineering allowable error.
Preferably, the size of the tap hole of the valve body is determined as follows: according to the maximum standpipe pressure of permission
Changing value △ PmaxTake setting j pressure drop numerical value △ P of quantityi；According to each pressure drop numerical value △ PiCalculate shunting corresponding with pressure drop
The equivalent section product A in hole；
Wherein,The quantity of n expression tap hole；C is discharge coefficient, Q table
Show that flow, ρ indicate fluid density.
Preferably, the cloth hole site of the tap hole of the valve body is determined as follows: the bottom disc of valve body is drawn
It is divided into m parts of sectors, n subregion is chosen each tap hole is respectively set in interval from m parts of sectors；For setting for each tap hole
It sets, the left and right ends of tap hole and gained fan-shaped boundary line when the bottom disc of valve body is divided m parts are tangent, and make this
The center of tap hole is located on fan-shaped medium line.
Preferably, the shape that fan shape obtained by when the bottom disc of valve body being divided into m parts is determined as the valve block is big
It is small.
According to another aspect of an embodiment of the present invention, a kind of superhigh temperature that design method as described above obtains is additionally provided
Mechanical orienting tool gauge is used to measure the downhole orientation tool face azimuth under hyperthermal environments, the measuring device
It include: shell；At least one valve body is installed in the shell, and the center position of bottom disc is provided with main throttling
Hole, and multiple tap holes of different sizes are set in the edge of the bottom disc；At least one valve block is arranged in institute
It states in shell, for can be completely hidden when being rotated in the shell under the gravity of its own in positioning operation
Keep off the corresponding tap hole of the valve body；Top connection is used to for the valve body and valve block being pressed in the shell.
Preferably, when the valve body and valve block are multiple, multiple valve bodies cascade and the top connection and shell are arranged in
Body is formed by cavity, and the valve block setting is formed by cavity and valve body with valve body in valve body and is formed by with top connection
In cavity, the valve block cavity locating for it can be circumferentially rotated under gravity.
Preferably, when the valve body and valve block are one, the main throttle orifice and all tap holes are distributed in institute
It states in the bottom disc of valve body.
According to another aspect of an embodiment of the present invention, a kind of superhigh temperature mechanical orienting tool face angle measurement system is additionally provided
System, the system comprises: orientation joint；Measuring device as described above is installed on the orientation joint, in orientation joint
When tool-face is put to different positions, different degrees of throttling is carried out to the drilling fluid for flowing through itself, to generate different pressures
Drop；It is vertical to monitor the ground changed with the change in pressure drop of the measuring device in ground surface end for pressure monitoring device, setting
Pipe pressure size；Directional orientation tool face angle determining device, connect with the pressure monitoring device, based on default tool face azimuth-pressure
Power relationship determines the directional orientation tool face angle of drilling well according to the ground standpipe pressure size.
Compared with prior art, one or more embodiments in above scheme can have following advantage or beneficial to effect
Fruit:
The present invention is directed to traditional measurement while drilling (Measure While Drilling, MWD) system and does not adapt to superhigh temperature
The problem of stratum orientation construction, provides the mechanical underground tool planar survey based on ground monitoring down-hole pressure signal intensity
Device and its design method.Mating measuring device is installed before tool lower going-into-well bottom, checks initial tool face angle, and remembered
Record, when tool-face is put in orientation construction, the measure of the change by ground rotary tools real-time monitoring down-hole pressure signal is anti-twisted
Angle and current tool face angle.The measuring device is unique mechanical underground tool-face pressure signal transmitting device, in device not
Containing electronic component, therefore, the measuring device is not affected by the high temperature, can be realized the orientation construction of superhigh temperature horizontal well.
Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification
It obtains it is clear that being understood by implementing technical solution of the present invention.The objectives and other advantages of the invention can by
Specifically noted structure and/or process are achieved and obtained in specification, claims and attached drawing.
Detailed description of the invention
Attached drawing is used to provide to the technical solution of the application or further understanding for the prior art, and constitutes specification
A part.Wherein, the attached drawing for expressing the embodiment of the present application is used to explain the technical side of the application together with embodiments herein
Case, but do not constitute the limitation to technical scheme.
Fig. 1 is that the cross-section structure of superhigh temperature mechanical orienting tool gauge according to an embodiment of the invention shows
It is intended to；
Fig. 2 (A), (B) and (C) is the gauge of superhigh temperature mechanical orienting tool shown in Fig. 1 respectively in A-A, B-
Diagrammatic cross-section at B and C-C；
Fig. 3 (A), (B) and (C) is each valve body of the gauge of superhigh temperature mechanical orienting tool shown in Fig. 1 respectively
Three dimensional structure diagram.
Fig. 4 is the division schematic diagram that the body base disk of measuring device is virtually divided into m parts, in figure, main section centered on a
Discharge orifice example, b are tap hole schematic diagram, and c is weighting block (valve block) schematic diagram；
Fig. 5 is tap hole in the single pattern schematic diagram divided in sector.
Specific embodiment
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings and examples, how to apply to the present invention whereby
Technological means solves technical problem, and the realization process for reaching relevant art effect can fully understand and implement.This Shen
Please each feature in embodiment and embodiment, can be combined with each other under the premise of not colliding, be formed by technical solution
It is within the scope of the present invention.
For horizontal well drilling tool face azimuth measuring technique, water is mainly carried out using measurement while drilling (MWD) system both at home and abroad
The measurement of horizontal well tool face azimuth.The orientation construction of superhigh temperature horizontal well is widely present in China's oil and gas development, hot dry rock resource exploration,
Traditional mwd system can carry out real-time measurement to the major project parameter in orientation construction, but its temperature tolerance is poor, both at home and abroad
Mature 175 DEG C of mwd system heatproof are no longer satisfied the requirement of China's superhigh temperature horizontal well directed drilling construction.
For example, the current above ultradeep well quantity of Tarim Basin In Xinjiang 8000m is continuously increased, shaft bottom maximum temperature is more than
200 DEG C, temperature is up to 236 DEG C at the hot dry rock exploratory well GR1 well shaft bottom 3705m that Qinghai republicanism is drilled to.And it is current domestic and international
Main mwd system to be no longer satisfied superhigh temperature (be then considered as superelevation warm water when bottom hole temperature (BHT) reaches 200 DEG C or more
It is flat) construction of horizontal well directed drilling.
Since the application of electronic component is by temperature limiting, traditional mwd system cannot be used for superhigh temperature horizontal well orientation and apply
Tool planar survey in work.Therefore, in order to evade the limitation of electronic component, the embodiment of the present invention proposes a kind of based on ground
The directional orientation tool gauge of face standpipe pressure Monitoring on Dynamic Change.The measuring device of the present embodiment is not by hyperthermal environments
Under the influence of, the directional orientation tool face during horizontal well drilling can be accurately measured, for superhigh temperature by the tool face azimuth of measurement
The horizontal well orientation construction of layer provides underlying parameter and technical support.
In one embodiment, which includes: shell；At least one valve body is installed in the shell,
The center position of bottom disc is provided with main throttle orifice, and is arranged in the edge of the bottom disc multiple of different sizes
Tap hole；At least one valve block, it is disposed in the housing, it is used in positioning operation, under the gravity of its own
The corresponding tap hole of the valve body can be completely blocked when rotating in the shell；Top connection is used for the valve body
It is pressed in the shell with valve block.When the valve body and valve block are multiple, multiple valve bodies cascade and are arranged on described
Connector and shell are formed by cavity, and the valve block setting is formed by cavity and valve body and top connection in valve body and valve body
It is formed by cavity, the valve block can be circumferentially rotated in cavity locating for it under gravity.
Illustrate measuring device proposed by the present invention below by a specific embodiment, in this embodiment, valve body and
Valve block is multiple, and quantity is equal.
By taking tool-face measurement accuracy is set as 60 ° as an example, the sectional view of the measuring device designed is as shown in Figure 1.It should
Measuring device includes: top connection 501, shell 502, the first valve body 503, the first valve block 504, the second valve body 505, the second valve block
506, third valve body 507 and third valve block 508.Illustrate the major function of these parts separately below.
1. top connection
Top connection is one of important component of the present apparatus, main to rise after valve body and valve block are fit into shell
To the effect for compressing valve body and valve block.
2. shell
Shell is the ontology of the device, and valve body and valve block are equipped in shell, plays the role of protecting valve body and valve block.
3. valve body
In this example, as shown in Fig. 3 (A), (B) and (C), there are protrusion dental forceps in the upper end of each valve body, valve bodies at different levels are logical
It crosses dental forceps and stings and be tightly attached.It is caught in mouth in the dental forceps that the lower end of each valve body is provided with corresponding valve body dental forceps, for next step valve
Body is caught in.It is provided with main throttle orifice at body base disc centre, is the main thoroughfare of circulating fluid；In body base
The edge of disk is configured with tap hole, and the size design of the tap hole and cloth hole site are designed by aftermentioned design method, main to rise
To shunting and throttling action.
In measuring device shown in Fig. 3, the first valve body 503 therein, the second valve body 505, in third valve body 507
Between be each formed with the identical main throttle orifice of a size at position and (be distributed in first in the first valve body 503 in such as Fig. 1 or Fig. 2
Main throttle orifice 503a, the second main throttle orifice 505a being distributed in the second valve body 505 and be distributed in third valve body 507
Three main throttle orifice 507a etc.).These main throttle orifices are capable of forming the main thoroughfare of circulating fluid.
Other than above-mentioned main throttle orifice, it is also respectively disposed with an auxiliary throttle orifice on each valve body and (also referred to as " shunts
Hole "), these three tap holes differ in size, and specific size carries out detailed design according to subsequent design method.Auxiliary throttle orifice
It is capable of forming the accessory channel of circulating fluid, plays the role of shunting and throttling to drilling fluid.As shown in Figure 3 is distributed in
Tap hole 503b on first valve body 503, the tap hole 505b being distributed on the second valve body 505 and it is distributed in third valve body 507
On tap hole 507b.
4. valve block
The shape size of valve block be 1/m ( For engineering allowable error) body base disk is big
It is small, the fan shape of valve block c as shown in Figure 4.It can just be blocked when valve block side low to drilling tool since gravity rotates
The tap hole of valve body realizes that dynamic adjusts the effect of bottom-hole pressure drawdown, to realize the dynamic change of ground standpipe pressure.
When being assembled, third valve body 507, third valve block 508 are put into shell 502 first, then by the second valve
Body 505, the second valve block 506 are fitted into shell 502.When installing the second valve body 505, to make the of the disk of the second valve body 505
The center of the auxiliary throttle orifice 507b of third of two auxiliary throttle orifice 505b and third valve body 507 is at 120 ° of top plan view distance.Then again
Secondary loading the first valve body 503, the first valve block 504, equally make the first auxiliary throttle orifice 503b and the second valve body of the first valve body 503
The auxiliary throttle orifice 505b of the second of 505, at a distance of 120 °, finally compresses valve body with top connection 501 on vertical view face.
After finishing assembly, the first valve block 504 can be formed by cavity with the first valve body 503 in top connection 501 and move
Dynamic, the second valve block 506 can be formed by cavity with the second valve body 505 in the first valve body 503 and move, third valve block 508
It can then be formed by cavity and move with third valve body 507 in the second valve body 505.These valve blocks can be under the effect of gravity
When rotating side low to drilling tool, and corresponding auxiliary throttle orifice is blocked just, thus realize that dynamic adjusts the effect of bottom-hole pressure drawdown, into
And make ground standpipe pressure dynamic change.
Illustrate the measuring device is how to be oriented the measurement of tool face azimuth below.When carrying out tool planar survey,
It needs the measuring device and other tool combinations into a superhigh temperature mechanical orienting tool face angle measuring system, the system
It include: orientation joint；Measuring device is installed on the top of orientation joint, puts in orientation joint tool-face to different angles
When, different degrees of throttling is carried out to the drilling fluid for flowing through itself, to generate different pressure drops；Pressure monitoring device is set
It sets in ground surface end, monitors the ground standpipe pressure size changed with the change in pressure drop of the measuring device；And orientation work
Have face angle determining device, connect with the pressure monitoring device, based on default tool face azimuth-pressure dependence according to describedly
Face standpipe pressure size determines the directional orientation tool face angle of drilling well.Wherein, presetting tool face azimuth-pressure dependence can be by as follows
Mode obtains: after well head installs bottom drilling assembly, rotary tools first, and equipments of recording face is in different angle
Well head pressure data cases (for example, recording measuring device pressure size in real time, and the ginseng such as calculate corresponding change in pressure drop
Number), to obtain tool face azimuth-pressure dependence.So in the construction process, directional orientation tool face angle determining device is also
Underground work is distinguished based on the well head pressure situation of surface seismic records come the well head pressure data according to detected by pressure monitoring device
The specific location in tool face, thus the real-time measurement of implementation tool face angle.
In specific measurement, when orientation joint tool-face is put to Difference angles, the pressure drop size of the measuring device
Automatically change therewith, and then realize that standpipe pressure size in ground changes therewith.The pressure monitoring device of ground setting passes through monitoring
The dynamic change of standpipe pressure, and the ground standpipe pressure size that measurement obtains is transferred to directional orientation tool face angle determining device
It can determine the size at downhole tool face angle.The core of measurement is exactly to cause the adjustment of down-hole mechanical formula method by drill string rotating
Device pressure drop dynamic change, and then the dynamic change of well head pressure is driven, pass through the change of real-time dynamic monitoring ground standpipe pressure
Change to measure downhole orientation tool face azimuth.
The implementation method (principle) of the change in pressure drop in relation to the measuring device is specifically described below.
The range of the tool face azimuth of the measuring device is 0-360 °, we, which bow, sees that measuring device is a disk, such as Fig. 2 or
Shown in Fig. 4, at this point, the disk seen of bowing can be divided into m parts, m=2n by we, then interval chooses n parts, in selected subregion
On open tap hole of different sizes, each tap hole corresponds to different pressure drops.When tool-face is put in directed drilling construction, survey
Amount device rotates with, we can realize that measurement pipe nipple becomes with tool face azimuth by close/open difference tap hole at this time
Change and changes.Specifically, there are hole deviation in the construction of superhigh temperature directed drilling, we can by configure weighting block c (such as
Moushroom valve) mode using gravity to tap hole carry out switching operations.
Other than being provided with the measuring device of multiple valve bodies and valve block above, a valve body and a valve can also be set
Block.In the measuring device for having multiple valve bodies and valve block, main throttle orifice runs through the center of each valve body, can on each valve body
One or more tap holes are arranged.And when valve body and valve block are one, main throttle orifice and all tap holes are distributed in
In the bottom disc of valve body.
It illustrates how to be designed the measuring device below.
Main throttle orifice is set in the bottom disc center position of valve body first.
Then, the required precision oriented according to drilled strata determines configuration in the bottom disc edge of the valve body
Quantity, size and the cloth hole site of tap hole.Specifically bright step below.
(1) tap hole quantitative design method
Number is divided according to the bottom disc that Specific construction required precision (size of engineering allowable error) calculates valve body.If
Engineering allowable error isThe number divided needed for following equation calculation disk then can be used:
In formula: if int is indicatedIt is not integer, then to its round.
Then, the quantity of the tap hole of the valve body is determined based on the division number being calculated.If m is odd number, m
=m+1, preceding to have addressed m=2n, then n value is m/2, i.e. shunting hole number n, i.e., shown in following expression.
It needs to recalculate device measurement error after determining division numbers, specifically uses following equation calculation:
(2) tap hole size and the design of tap hole pressure drop
As previously mentioned, shunting hole number is n, determine that the maximum standpipe pressure allowed becomes according to ground construction equipment situation
Change value △ Pmax, then according to △ Pmax, in 0- △ PmaxBetween take j pressure drop numerical value △ Pi, j value is using following equation calculation:
Simplest pressure drop numerical value set-up mode is by △ PmaxJ equal portions are divided into,
Then it is directed to △ PiTap hole size in the case of pressure drop is designed, using following equation calculation and each pressure drop
△PiTap hole equivalent section accumulates A:
Wherein, c indicates discharge coefficient, and value is between 0.8-1；Q indicates flow, m3/s；ρ indicates fluid density,
kg/m3。
(3) implementation method of tool gauge
The core of tool gauge first is that the design of tap hole, preceding to have addressed, now to the specific implementation of the device
Method is introduced.
A. tap hole cloth hole sequence setting method
As previously mentioned, disk is divided into m equal portions, therebetween every choosing n (m/2) part arrangement tap hole, bow (perspective)
See tool-face test device inner cylinder, the sequence that each tap hole is uniformly distributed on entire disk, but deploys to ensure effective monitoring and control of illegal activities is that tool-face is surveyed
Measure the premise of device precision measuring instrument face angle.
The m equal portions that disk divides are numbered respectively, number value is 0,1,2 ..., m-1, then number be 0,2 ..., m-
2 position cloth hole.Key is the pressure drop setting in each hole, and the key of pressure drop setting can be known during ground monitoring
It is not that the tap hole at i-th of position is plugged during tool-face is put.
As previously mentioned, arrangement tap hole n is a altogether, if n is even number, n/2 voltage drop value is set, i.e., each voltage drop value pair
Two holes are answered, if n is odd number, arrange (n+1)/2 voltage drop value, the i.e. corresponding hole of only one of them specific pressure drop value,
Remaining all corresponds to two holes.Simplest pattern is, since the position of number 0, the tap hole orifice size of setting by
Step reduces, i.e. choke pressure drop incrementally increases, increases to maximum value and then gradually reduce, we are putting tool-face rotation in this way
The placement position of tool-face can be monitored when turning drilling tool.
Cloth hole sequence is not limited to the above method, as long as can tell which throttle orifice of shaft bottom is plugged on ground.
Specific cloth hole site is as shown in Figure 4.
B. tap hole cloth hole method for determining position
The bottom disc of valve body is divided into m parts of sectors, it is each to be respectively set to choose n subregion for interval from m parts of sectors
Tap hole.For the setting of each tap hole, the shape of tap hole is not limited to circle, fan-shaped, ellipse, round rectangle
(as shown in Figure 5) etc. all can, but it is to be noted that the left and right ends of tap hole must divide m with by the bottom disc of valve body
The fan-shaped boundary line of gained is tangent when block, and is located at the center in hole on fan-shaped medium line, as shown in Figure 5.
Finally, the quantity of shape and tap hole based on the bottom disc of valve body determines the shape size of valve block, so that working as
The valve block is due to can completely block corresponding tap hole when gravity rotates in the shell.Specifically, when
After the quantity of tap hole determines, i.e., bottom disc divides number and also has determined that (for m parts), then divides the bottom disc of valve body
It is determined as the shape size of the valve block at gained fan shape at m parts.It is readily appreciated that, the shape of previously described valve block is
Preferred example, not as restriction, as long as the valve block can completely cover each tap hole being arranged on valve body, area can be with
Than 1/m parts disk areas are small.
C. the specific implementation form of measuring device
After well head installs bottom drilling assembly, rotary tools, change in pressure drop feelings of the equipments of recording face in different angle
Condition (obtains corresponding change in pressure drop) in real time.It can be distinguished in the construction process according to the situation of change of the pressure drop of surface seismic records
The specific location of downhole tool face, thus the real-time measurement of implementation tool face angle.
The present invention provide it is a kind of for superhigh temperature horizontal well directional orientation tool gauge and method, the device by top connection,
Shell, valve block, valve body composition, valve body tap hole design and can be by the design that is mentioned herein in the intracorporal placement position of shell
Method determines.When the orientation construction of superhigh temperature horizontal well, after which is installed, associated pressure drop changing pattern is recorded by ground test
Formula can determine the specific of downhole tool face by the fluctuating change of ground standpipe pressure during downhole tool face is put
Numerical value can orient construction for superhigh temperature horizontal well and provide underlying parameter.
Although disclosed herein embodiment it is as above, the content is only to facilitate understanding the present invention and adopting
Embodiment is not intended to limit the invention.Any those skilled in the art to which this invention pertains are not departing from
Disclosed herein spirit and scope under the premise of, any modification and change can be made in the formal and details of implementation
Change, but scope of patent protection of the invention, still should be subject to the scope of the claims as defined in the appended claims.
Claims (10)
1. a kind of design method of superhigh temperature mechanical orienting tool gauge, the measuring device is for measuring superhigh temperature
Downhole orientation tool face azimuth under environment has shell, is installed on the intracorporal valve body of the shell and valve block, and by the valve
Body and valve block are pressed on the intracorporal top connection of shell, and the design method includes:
In the bottom disc center position of the valve body, main throttle orifice is set；
According to the required precision that drilled strata orients, determine configuration in the number of the tap hole of the bottom disc edge of the valve body
Amount, size and cloth hole site；
The quantity of shape and tap hole based on the bottom disc of the valve body determines the shape size of the valve block, so that working as institute
Valve block is stated due to can completely block corresponding tap hole when gravity rotates in the shell.
2. design method according to claim 1, which is characterized in that determine the tap hole of the valve body as follows
Quantity:
According to the size of Specific construction engineering allowable error, the bottom disc for calculating valve body divides number；
The quantity of the tap hole of the valve body is determined based on the division number being calculated.
3. design method according to claim 2, which is characterized in that the number of tap hole is calculated according to following expression
Amount:
Wherein, n indicates the quantity of tap hole, and m indicates that the bottom disc of valve body divides number,Wherein,Indicate the size of Specific construction engineering allowable error.
4. design method described in any one of claim 1 to 3, which is characterized in that described in determining as follows
The size of the tap hole of valve body:
According to the maximum standpipe pressure changing value △ P of permissionmaxTake setting j pressure drop numerical value △ P of quantityi；
According to each pressure drop numerical value △ PiCalculate the equivalent section product A of tap hole corresponding with pressure drop；
Wherein,The quantity of n expression tap hole；C indicates that discharge coefficient, Q indicate
Flow, ρ indicate fluid density.
5. design method according to any one of claims 1 to 4, which is characterized in that described in determining as follows
The cloth hole site of the tap hole of valve body:
The bottom disc of valve body is divided into m parts of sectors, n subregion is chosen each shunting is respectively set in interval from m parts of sectors
Hole；
For the setting of each tap hole, the left and right ends of tap hole and gained when the bottom disc of valve body is divided m parts are fanned
The boundary line of shape is tangent, and is located at the center of the tap hole on fan-shaped medium line.
6. design method according to claim 1, which is characterized in that
Gained fan shape is determined as the shape size of the valve block when bottom disc of valve body is divided into m parts.
7. a kind of superhigh temperature mechanical orienting tool face obtained such as design method according to any one of claims 1 to 6 is surveyed
Device is measured, is used to measure the downhole orientation tool face azimuth under hyperthermal environments, which includes:
Shell；
At least one valve body is installed in the shell, and the center position of bottom disc is provided with main throttle orifice, and
Multiple tap holes of different sizes are arranged in the edge of the bottom disc；
At least one valve block, it is disposed in the housing, it is used in positioning operation, in institute under the gravity of its own
The corresponding tap hole of the valve body can completely be blocked when rotating in shell by stating；
Top connection is used to for the valve body and valve block being pressed in the shell.
8. measuring device according to claim 7, which is characterized in that
When the valve body and valve block are multiple, multiple valve bodies cascade and are arranged in the top connection and shell is formed by chamber
In body, the valve block setting is formed by cavity and valve body in valve body and valve body and top connection is formed by cavity, the valve
Block cavity locating for it can be circumferentially rotated under gravity.
9. measuring device according to claim 7, which is characterized in that
When the valve body and valve block are one, the main throttle orifice and all tap holes are distributed in the bottom of the valve body
In disk.
10. a kind of superhigh temperature mechanical orienting tool face angle measuring system, which is characterized in that the system comprises:
Orientation joint；
Measuring device as described in any one of claim 7~9 is installed on the orientation joint, in orientation joint tool
When face is put to different positions, by carrying out different degrees of throttling to the drilling fluid for flowing through itself, to generate different pressures
Drop；
It is vertical to monitor the ground changed with the change in pressure drop of the measuring device in ground surface end for pressure monitoring device, setting
Pipe pressure size；
Directional orientation tool face angle determining device, connect with the pressure monitoring device, based on default tool face azimuth-pressure dependence root
The directional orientation tool face angle of drilling well is determined according to the ground standpipe pressure size.
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| CN114427433A (en) * | 2020-09-15 | 2022-05-03 | 中国石油化工股份有限公司 | Downhole tool face measuring tool based on mechanical pressure regulation |
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| CN113756788A (en) * | 2021-10-18 | 2021-12-07 | 中国地质大学（北京） | Mechanical type is along with boring well deviation measuring apparatu |
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| CN110374581B (en) | 2022-05-20 |
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