CA1056808A - Thrust and tension measuring device for use with flexible tubing injectors on drilling rigs - Google Patents
Thrust and tension measuring device for use with flexible tubing injectors on drilling rigsInfo
- Publication number
- CA1056808A CA1056808A CA285,474A CA285474A CA1056808A CA 1056808 A CA1056808 A CA 1056808A CA 285474 A CA285474 A CA 285474A CA 1056808 A CA1056808 A CA 1056808A
- Authority
- CA
- Canada
- Prior art keywords
- tubing
- piston
- cylinder
- assembly
- injector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 7
- 230000033001 locomotion Effects 0.000 claims abstract description 10
- 241001052209 Cylinder Species 0.000 claims abstract description 3
- 230000000712 assembly Effects 0.000 claims description 10
- 238000000429 assembly Methods 0.000 claims description 10
- 239000012530 fluid Substances 0.000 claims description 9
- 230000006872 improvement Effects 0.000 claims description 8
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 208000036366 Sensation of pressure Diseases 0.000 abstract 2
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 208000027697 autoimmune lymphoproliferative syndrome due to CTLA4 haploinsuffiency Diseases 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007864 suspending Methods 0.000 description 1
- 244000057424 walen Species 0.000 description 1
Classifications
-
- 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
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/08—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods
- E21B19/086—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods with a fluid-actuated cylinder
-
- 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
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/22—Handling reeled pipe or rod units, e.g. flexible drilling pipes
-
- 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
- E21B44/00—Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
-
- 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
- E21B47/007—Measuring stresses in a pipe string or casing
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Geophysics (AREA)
- Earth Drilling (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A flexible tube injector is mounted for limited vertical movement within a frame and a piston and cylin-der assembly is operatively connected between the frame and the injector and is operatively connected to a pres-sure gauge which may be calibrated to read pounds pres-sure of thrust and/or pounds pressure of tension. As the injector applies downward pressure on the flexible drill tubing, the pressure is indicated on the gauge so that the optimum drilling pressure is maintained and ex-cess pressure is avoided. When withdrawing the drilling string, the tension measuring gauge enables the operator to ensure that the drill bit is being withdrawn cleanly and is not jamming within the drill hole.
A flexible tube injector is mounted for limited vertical movement within a frame and a piston and cylin-der assembly is operatively connected between the frame and the injector and is operatively connected to a pres-sure gauge which may be calibrated to read pounds pres-sure of thrust and/or pounds pressure of tension. As the injector applies downward pressure on the flexible drill tubing, the pressure is indicated on the gauge so that the optimum drilling pressure is maintained and ex-cess pressure is avoided. When withdrawing the drilling string, the tension measuring gauge enables the operator to ensure that the drill bit is being withdrawn cleanly and is not jamming within the drill hole.
Description
BACKGROUND OF T~IE INVENTION
This invention relates to new and ~seful improve-ments in devices for measuring the thrust of a drill bit and/or the tension on the drill string wALen same is being withdrawn.
Conventionally, the drill string consists of a string of pipe extending downwardly and having a bit on the lower end thereof, said bit being either of a rotatable type or of a percussive type, In both cases, the rota-tional movement is generated at the surface and the drill str1ng rotates.
~ith the advent of flexible tubing type drill . . : : ~ . . . . ~ - ., ,: . . , .. . ~ ~ . .. . . . . - . , : . , , ;, . : : .. ..
- - - : - . , , . . .. ::. .. ~. : . . , : .
strings, the power for the drill bit is carried on a lower end of the flexible tubing which does not rotate but is fed downwardly into the drill hole and withdrawn therefrom by means of an injector, it being understood that the flexible tubing is mounted upon a reel and is injected by the injector which engages over the upper end of the drill hole.
With the conventional tubing string, it is rela-tively easy to ascertain the thrust on the drill bit be-cause of the solid nature of the drill stringO
However, with the flexibl~ tubing string, it is difficult to measure the thrust on the bit and also to measure the tension in the flexible drill string when same is being withdrawn~
SUMMARY OF THE INVENTION
Z ~ r _ ~ ~ The present invention overcomes any disadvantages : inherent with the use of flexible drill string by provi-ding a pressure gauge connected to a fluid operator which is operatively connected between the injector and a sta- :
1 20 tionary frame~ : :
..
":
:
One aspect of the invention consis~s of means to : :~
measure the compression and tension of the drill tubing and hence the thrust upon the bit when drilling and the tension in the tubing when withdrawing, said means inclu-ding at least one fluid piston and c~linder assembl~
operatively connected be~ween said injector and said frame and pressure indicating means operatively connected to said fluid piston and cylinder assembly.
Another aspect enables ~he injector mechanism to be mounted for relative vertical rloating movement so that both the compression and tension within the drill string can be measured accurately at all times.
Another object of the invention is to provide a device of the character herewithin described which en-sures that the optimum thrust is present upon the drill bit and prevents undue thrust from being used which could not only damage the drill bit but can reduce the speed of drilling.
, ~ ~ 15 A yet further object of the invention is to pro-.; .
~,~ vide a device of the character herewithin described which it ~: ` iS simple in constructiont economical in manufacture and ;
~ otherwise well suited to the purpose for which it is de- -::
~i ~ signedO
, i ' ~ ':
~' 20 With the foregoing objects in view, and other such objects and advantages as will become apparent to those skilled in the art to which this invention relates as this specification proceeds, my invention consists essen-:
'. ' ':
.
;8~
tially in the arrangemen~ and construction of par~s all as hereinaEter more particularly ~escribed, refer-ence being had to the accompanying drawings in which:-DESCRIPTION OF THE DRAWINGS
:
Figure 1 is a fragmentary front elevation of an injector assembly mounted within a stationary frame and ~ -with the invention incorporated therein.
Figure 2 is a partially schematic side elevation of Figure 1.
~- .
Figure 3 is a schematic: view of the fluid opera-tors and pressure gauges attached thereto.
In the drawings like characters of reference in~
dicate corresponding parts in the different figures~ :
i ~ :
: : DETAILED DESCRIPTION
. ~ 15 Proceeding therefore to describe the invention in : detail, reference character 10 indicates generally a tu- i~
I bing injector adapted to inject or withdraw flexible tu-bing 11 from a reel (not illustrated) downwardly into a ~ :.
bore hole of a well indicated schematically by reference : :
character 12. .~
'': ' ~ .
':.' " ~", :, :' '' ' .. :'. ' 81~
The tubing injector, which is conventional, in-cludes a pair of spaced and parallel side plates 13 and a pair of tubing engaging drive chain assemblies indicated by reference character 14 engaging around pulley assemblies 15 and including the opposed vertical rungs 16 centrally of the casing 28 formed by the plate 13 and assemblies 14, between which the tubing 11 is squeezed for upward and down-ward movement depending upon the direction of motion of the chain assemblies 14. Hydraulic motors (not illustrated) drive these chains via drive shaft 17 and main drive chain 18.
This assembly is situated within a support frame :
collectively designated 19 which consists of a pair of spa ced and parallel longitudinally extending vertical members 20 extending upwardly from cross beams 21 which in turn are supported upon I-beams 22 shown in Figures 1 and 2.
Other bracing (not illustrated) may be included :~:
: in the support frame 19, but does not form part of this in-vention.
A cross member 23 spans the upper ends of the .
members 20 and supports a pair of fluid piston and cylin-der assemblies collectively designated 24 one upon each end thereof. Although in the present drawings, two such piston and cylinder assemblies are shown, nevertheless it will be appreciated that the frame could be modified so :
that only one such piston and cylinder assembly is provi-- 5 - ~:
.. . .
c~
ded. However, at least two are generally required and, if desired, two similar piston and cylinder assemblies can be provided on the opposite side of the frame.
These piston and cylinder assemblies 24 include cylinders 25 which are pivotally supported from lugs 26 depending from the cross bar or member 23.
Brackets 27 are secured to the casing 28 of the tubing injector 13 and forked ends or clevises 28A situated on the outer ends of the piston rods 29, are pivotally con-nected to these brackets by means of pivot pins 30 thus sus pending the injection assembly 13 from the cross member 23 of the stationary frame 19.
Figure 3 shows one embodiment of the connections between the piston and cylinder assemblies 24. They are connected in series one with the other by means of upper conduits 31 and lower conduits 32, the first conduits being on one side of the piston 32 within the cylinder 25 and the other being on the other side of the piston.
: ' :: ..
Each conduit 31 and 32 is connected to a pres-~sure gauge 31A and 32A respectively and the system is char- ~ :
ged with hydraulic fluid or the equivalent through nipples 33.
' :, .
The system is therefore a sealed system and the r- .
. . . ~. . . , ~ . .
.: . . . . . . . .
~56~
charging thereo~ can zero the pressure gauges to counter-act the weight of the injection assembly 13 suspended with-in the frame 19.
A cross bar 34 is secured to one vertical frame member 20 adjacent the lower end thereof and extends upon either side, parallel to the front face of the casing 28 -of the injection assembly 13 and bumpers 35 extend out-wardly from this face of the casing on either side of the vertical member 20 and above and below the cross bar 33 and engage the cross bar thus limiting the vertical floating movement of the injection assembly 13 relative to the frame.
In operation, and assuming that the tubing 11 ~-~
is being urged downwardly within tlle dril]. hole, a drill lS bit (not illustrated) together with a source of power there-fore (also not illustrated), is secured to the lower end of the flaxible tubing string 11.
The upward and downward movement of the drill string tubing 11 is obtained by the aforementioned drive chains 14, gripping upon either side of the flexible tubing along the vertical runs 16 and varying pressure can be ap-plied to these vertical runs to urge them into frictional ... . .
engagement wlth the flexible tubing to accomplish this move-ment. However, as this does not form part of the present `~
invention, details have been deleted for clarity.
',,` ':"~, ', ':
~r ~S~ 8 , ~:
~hen the drill bit reaches the bottom of the drill hole, pressure is applied by the drive chai~ 1~
and drilling commences. Downward pressure upon the drill string relieves the weight of the injection assembly 13 and`is indicated by the pressure gauge 31A so that the desired optimum pressure can r~adily be main~ained and excessive pressure avoided.
When it is desired to withdraw the flexible drill tubing 11, the drive chains 14 are reversed and the drill bit]ifted. The tension on the drill string once again will react on the weight of the injection assembly 13 and this tension will show up on the pressure gauge 32A.
Although both pressure gauges 31A and 32A may be graduated in pounds per square inch, nevertheless it is ]5 desirable that these be trans]ated to pounds of thrust or equivalent so that direct readings can be taken of both the downward thrust and t:he upward tension within ~-the flexible drill tubing 11.
' The tension indication on pressure gauge 32A is useful in case the drill bit gets hung up during the .
extraction and prevents undesirable tension from being applied to the drill tubing 11 which may result in break-age occurring.
' " ~ :
Since various modifications can be made in my in-.".
s~
vention as hereinabove described, and many apparently widely dif:Eerent embodiments of same made wi.-thin the spirit and scope of the claims without departin~ from such spirit and scope, it is intend~d that all matter contained in the accompanying specification shall be interpreted as illustrative only and not in a limiting sense.
~ "'
This invention relates to new and ~seful improve-ments in devices for measuring the thrust of a drill bit and/or the tension on the drill string wALen same is being withdrawn.
Conventionally, the drill string consists of a string of pipe extending downwardly and having a bit on the lower end thereof, said bit being either of a rotatable type or of a percussive type, In both cases, the rota-tional movement is generated at the surface and the drill str1ng rotates.
~ith the advent of flexible tubing type drill . . : : ~ . . . . ~ - ., ,: . . , .. . ~ ~ . .. . . . . - . , : . , , ;, . : : .. ..
- - - : - . , , . . .. ::. .. ~. : . . , : .
strings, the power for the drill bit is carried on a lower end of the flexible tubing which does not rotate but is fed downwardly into the drill hole and withdrawn therefrom by means of an injector, it being understood that the flexible tubing is mounted upon a reel and is injected by the injector which engages over the upper end of the drill hole.
With the conventional tubing string, it is rela-tively easy to ascertain the thrust on the drill bit be-cause of the solid nature of the drill stringO
However, with the flexibl~ tubing string, it is difficult to measure the thrust on the bit and also to measure the tension in the flexible drill string when same is being withdrawn~
SUMMARY OF THE INVENTION
Z ~ r _ ~ ~ The present invention overcomes any disadvantages : inherent with the use of flexible drill string by provi-ding a pressure gauge connected to a fluid operator which is operatively connected between the injector and a sta- :
1 20 tionary frame~ : :
..
":
:
One aspect of the invention consis~s of means to : :~
measure the compression and tension of the drill tubing and hence the thrust upon the bit when drilling and the tension in the tubing when withdrawing, said means inclu-ding at least one fluid piston and c~linder assembl~
operatively connected be~ween said injector and said frame and pressure indicating means operatively connected to said fluid piston and cylinder assembly.
Another aspect enables ~he injector mechanism to be mounted for relative vertical rloating movement so that both the compression and tension within the drill string can be measured accurately at all times.
Another object of the invention is to provide a device of the character herewithin described which en-sures that the optimum thrust is present upon the drill bit and prevents undue thrust from being used which could not only damage the drill bit but can reduce the speed of drilling.
, ~ ~ 15 A yet further object of the invention is to pro-.; .
~,~ vide a device of the character herewithin described which it ~: ` iS simple in constructiont economical in manufacture and ;
~ otherwise well suited to the purpose for which it is de- -::
~i ~ signedO
, i ' ~ ':
~' 20 With the foregoing objects in view, and other such objects and advantages as will become apparent to those skilled in the art to which this invention relates as this specification proceeds, my invention consists essen-:
'. ' ':
.
;8~
tially in the arrangemen~ and construction of par~s all as hereinaEter more particularly ~escribed, refer-ence being had to the accompanying drawings in which:-DESCRIPTION OF THE DRAWINGS
:
Figure 1 is a fragmentary front elevation of an injector assembly mounted within a stationary frame and ~ -with the invention incorporated therein.
Figure 2 is a partially schematic side elevation of Figure 1.
~- .
Figure 3 is a schematic: view of the fluid opera-tors and pressure gauges attached thereto.
In the drawings like characters of reference in~
dicate corresponding parts in the different figures~ :
i ~ :
: : DETAILED DESCRIPTION
. ~ 15 Proceeding therefore to describe the invention in : detail, reference character 10 indicates generally a tu- i~
I bing injector adapted to inject or withdraw flexible tu-bing 11 from a reel (not illustrated) downwardly into a ~ :.
bore hole of a well indicated schematically by reference : :
character 12. .~
'': ' ~ .
':.' " ~", :, :' '' ' .. :'. ' 81~
The tubing injector, which is conventional, in-cludes a pair of spaced and parallel side plates 13 and a pair of tubing engaging drive chain assemblies indicated by reference character 14 engaging around pulley assemblies 15 and including the opposed vertical rungs 16 centrally of the casing 28 formed by the plate 13 and assemblies 14, between which the tubing 11 is squeezed for upward and down-ward movement depending upon the direction of motion of the chain assemblies 14. Hydraulic motors (not illustrated) drive these chains via drive shaft 17 and main drive chain 18.
This assembly is situated within a support frame :
collectively designated 19 which consists of a pair of spa ced and parallel longitudinally extending vertical members 20 extending upwardly from cross beams 21 which in turn are supported upon I-beams 22 shown in Figures 1 and 2.
Other bracing (not illustrated) may be included :~:
: in the support frame 19, but does not form part of this in-vention.
A cross member 23 spans the upper ends of the .
members 20 and supports a pair of fluid piston and cylin-der assemblies collectively designated 24 one upon each end thereof. Although in the present drawings, two such piston and cylinder assemblies are shown, nevertheless it will be appreciated that the frame could be modified so :
that only one such piston and cylinder assembly is provi-- 5 - ~:
.. . .
c~
ded. However, at least two are generally required and, if desired, two similar piston and cylinder assemblies can be provided on the opposite side of the frame.
These piston and cylinder assemblies 24 include cylinders 25 which are pivotally supported from lugs 26 depending from the cross bar or member 23.
Brackets 27 are secured to the casing 28 of the tubing injector 13 and forked ends or clevises 28A situated on the outer ends of the piston rods 29, are pivotally con-nected to these brackets by means of pivot pins 30 thus sus pending the injection assembly 13 from the cross member 23 of the stationary frame 19.
Figure 3 shows one embodiment of the connections between the piston and cylinder assemblies 24. They are connected in series one with the other by means of upper conduits 31 and lower conduits 32, the first conduits being on one side of the piston 32 within the cylinder 25 and the other being on the other side of the piston.
: ' :: ..
Each conduit 31 and 32 is connected to a pres-~sure gauge 31A and 32A respectively and the system is char- ~ :
ged with hydraulic fluid or the equivalent through nipples 33.
' :, .
The system is therefore a sealed system and the r- .
. . . ~. . . , ~ . .
.: . . . . . . . .
~56~
charging thereo~ can zero the pressure gauges to counter-act the weight of the injection assembly 13 suspended with-in the frame 19.
A cross bar 34 is secured to one vertical frame member 20 adjacent the lower end thereof and extends upon either side, parallel to the front face of the casing 28 -of the injection assembly 13 and bumpers 35 extend out-wardly from this face of the casing on either side of the vertical member 20 and above and below the cross bar 33 and engage the cross bar thus limiting the vertical floating movement of the injection assembly 13 relative to the frame.
In operation, and assuming that the tubing 11 ~-~
is being urged downwardly within tlle dril]. hole, a drill lS bit (not illustrated) together with a source of power there-fore (also not illustrated), is secured to the lower end of the flaxible tubing string 11.
The upward and downward movement of the drill string tubing 11 is obtained by the aforementioned drive chains 14, gripping upon either side of the flexible tubing along the vertical runs 16 and varying pressure can be ap-plied to these vertical runs to urge them into frictional ... . .
engagement wlth the flexible tubing to accomplish this move-ment. However, as this does not form part of the present `~
invention, details have been deleted for clarity.
',,` ':"~, ', ':
~r ~S~ 8 , ~:
~hen the drill bit reaches the bottom of the drill hole, pressure is applied by the drive chai~ 1~
and drilling commences. Downward pressure upon the drill string relieves the weight of the injection assembly 13 and`is indicated by the pressure gauge 31A so that the desired optimum pressure can r~adily be main~ained and excessive pressure avoided.
When it is desired to withdraw the flexible drill tubing 11, the drive chains 14 are reversed and the drill bit]ifted. The tension on the drill string once again will react on the weight of the injection assembly 13 and this tension will show up on the pressure gauge 32A.
Although both pressure gauges 31A and 32A may be graduated in pounds per square inch, nevertheless it is ]5 desirable that these be trans]ated to pounds of thrust or equivalent so that direct readings can be taken of both the downward thrust and t:he upward tension within ~-the flexible drill tubing 11.
' The tension indication on pressure gauge 32A is useful in case the drill bit gets hung up during the .
extraction and prevents undesirable tension from being applied to the drill tubing 11 which may result in break-age occurring.
' " ~ :
Since various modifications can be made in my in-.".
s~
vention as hereinabove described, and many apparently widely dif:Eerent embodiments of same made wi.-thin the spirit and scope of the claims without departin~ from such spirit and scope, it is intend~d that all matter contained in the accompanying specification shall be interpreted as illustrative only and not in a limiting sense.
~ "'
Claims
WHAT I CLAIM AS MY INVENTION IS:
(1) In a drill rig which includes a flexible tubing injector mounted for limited vertical floating move-ment within a stationary frame, and a flexible tubing string injected and withdrawn from a drill hole by said injector;
the improvement comprising means to measure the compression and tension of said tubing within said drill hole and hence the thrust upon the bit when drilling and the tension in the tubing when withdrawing, said means including at least one fluid piston and cylinder assembly operatively connected between said injector and said frame and pressure indicating means operatively connected to said fluid piston and cylin-der assembly.
(2) The improvement according to Claim 1 which includes means to limit the vertical floating movement of said injector within said frame.
(3) The improvement according to Claim 2 in which said frame includes a pair of spaced and parallel ver-tical members, said injector including a casing, said last mentioned means including a cross bar secured to one of said vertical members towards the lower end thereof and cross bar engaging bumpers extending from said injector casing above and below said cross bar and upon each side of said one vertical member.
(4) The improvement according to Claim 1 in which said indicating means includes a pressure gauge operatively connected to the cylinder of said piston and cylinder assembly and one side of the piston of said assem-bly, to indicate the compression of said tubing and hence the thrust upon the associated drill bit, and a further pressure gauge operatively connected to the cylinder upon the other side of said piston of said assembly to indicate the tension in said tubing and hence the pull exerted on said tubing when withdrawing same from said drill hole.
(5) The improvement according to Claim 2 in which said indicating means includes a pressure gauge opera-tively connected to the cylinder of said piston and cylinder assembly and one side of the piston of said assembly, to in-dicate the compression of said tubing and hence the thrust upon the associated drill bit, and a further pressure gauge operatively connected to the cylinder upon the other side of said piston of said assembly to indicate the tension in said tubing and hence the pull exerted on said tubing when withdrawing same from said drill hole.
(6) The improvement according to Claim 3 in which said indicating means includes a pressure gauge opera-tively connected to the cylinder of said piston and cylinder assembly and one side of the piston of said assembly, to in-dicate the compression of said tubing and hence the thrust upon the associated drill bit, and a further pressure gauge operatively connected to the cylinder upon the other side of said piston of said assembly to indicate the tension in said tubing and hence the pull exerted on said tubing when withdrawing same from said drill hole.
(7) The improvement according to Claims 2 or 6 which includes at least two fluid piston and cylinder as-semblies one upon each side of one vertical member of said frame.
(1) In a drill rig which includes a flexible tubing injector mounted for limited vertical floating move-ment within a stationary frame, and a flexible tubing string injected and withdrawn from a drill hole by said injector;
the improvement comprising means to measure the compression and tension of said tubing within said drill hole and hence the thrust upon the bit when drilling and the tension in the tubing when withdrawing, said means including at least one fluid piston and cylinder assembly operatively connected between said injector and said frame and pressure indicating means operatively connected to said fluid piston and cylin-der assembly.
(2) The improvement according to Claim 1 which includes means to limit the vertical floating movement of said injector within said frame.
(3) The improvement according to Claim 2 in which said frame includes a pair of spaced and parallel ver-tical members, said injector including a casing, said last mentioned means including a cross bar secured to one of said vertical members towards the lower end thereof and cross bar engaging bumpers extending from said injector casing above and below said cross bar and upon each side of said one vertical member.
(4) The improvement according to Claim 1 in which said indicating means includes a pressure gauge operatively connected to the cylinder of said piston and cylinder assembly and one side of the piston of said assem-bly, to indicate the compression of said tubing and hence the thrust upon the associated drill bit, and a further pressure gauge operatively connected to the cylinder upon the other side of said piston of said assembly to indicate the tension in said tubing and hence the pull exerted on said tubing when withdrawing same from said drill hole.
(5) The improvement according to Claim 2 in which said indicating means includes a pressure gauge opera-tively connected to the cylinder of said piston and cylinder assembly and one side of the piston of said assembly, to in-dicate the compression of said tubing and hence the thrust upon the associated drill bit, and a further pressure gauge operatively connected to the cylinder upon the other side of said piston of said assembly to indicate the tension in said tubing and hence the pull exerted on said tubing when withdrawing same from said drill hole.
(6) The improvement according to Claim 3 in which said indicating means includes a pressure gauge opera-tively connected to the cylinder of said piston and cylinder assembly and one side of the piston of said assembly, to in-dicate the compression of said tubing and hence the thrust upon the associated drill bit, and a further pressure gauge operatively connected to the cylinder upon the other side of said piston of said assembly to indicate the tension in said tubing and hence the pull exerted on said tubing when withdrawing same from said drill hole.
(7) The improvement according to Claims 2 or 6 which includes at least two fluid piston and cylinder as-semblies one upon each side of one vertical member of said frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA285,474A CA1056808A (en) | 1977-08-25 | 1977-08-25 | Thrust and tension measuring device for use with flexible tubing injectors on drilling rigs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA285,474A CA1056808A (en) | 1977-08-25 | 1977-08-25 | Thrust and tension measuring device for use with flexible tubing injectors on drilling rigs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1056808A true CA1056808A (en) | 1979-06-19 |
Family
ID=4109405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA285,474A Expired CA1056808A (en) | 1977-08-25 | 1977-08-25 | Thrust and tension measuring device for use with flexible tubing injectors on drilling rigs |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1056808A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4585061A (en) * | 1983-10-18 | 1986-04-29 | Hydra-Rig Incorporated | Apparatus for inserting and withdrawing coiled tubing with respect to a well |
| US6059029A (en) * | 1997-05-02 | 2000-05-09 | Hydra Rig, Inc. | Coiled tubing injector |
| US6173769B1 (en) | 1998-04-30 | 2001-01-16 | Hydra Rig, Inc. | Universal carrier for grippers in a coiled tubing injector |
| USRE43410E1 (en) | 1997-05-02 | 2012-05-29 | Varco I/P, Inc. | Universal carrier for grippers in a coiled tubing injector |
| US8544536B2 (en) | 2010-09-24 | 2013-10-01 | National Oilwell Varco, L.P. | Coiled tubing injector with limited slip chains |
| US8701754B2 (en) | 2012-06-18 | 2014-04-22 | National Oilwell Varco, L.P. | Coiled tubing injector with strain relief |
| US9399895B2 (en) | 2011-09-02 | 2016-07-26 | National Oilwell Varco L.P. | Coiled tubing injector head with chain guides |
| US10995563B2 (en) | 2017-01-18 | 2021-05-04 | Minex Crc Ltd | Rotary drill head for coiled tubing drilling apparatus |
-
1977
- 1977-08-25 CA CA285,474A patent/CA1056808A/en not_active Expired
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4585061A (en) * | 1983-10-18 | 1986-04-29 | Hydra-Rig Incorporated | Apparatus for inserting and withdrawing coiled tubing with respect to a well |
| US6059029A (en) * | 1997-05-02 | 2000-05-09 | Hydra Rig, Inc. | Coiled tubing injector |
| USRE43410E1 (en) | 1997-05-02 | 2012-05-29 | Varco I/P, Inc. | Universal carrier for grippers in a coiled tubing injector |
| USRE46119E1 (en) | 1997-05-02 | 2016-08-23 | Varco I/P, Inc. | Universal carrier for grippers in a coiled tubing injector |
| US6173769B1 (en) | 1998-04-30 | 2001-01-16 | Hydra Rig, Inc. | Universal carrier for grippers in a coiled tubing injector |
| US8544536B2 (en) | 2010-09-24 | 2013-10-01 | National Oilwell Varco, L.P. | Coiled tubing injector with limited slip chains |
| US9151122B2 (en) | 2010-09-24 | 2015-10-06 | National Oilwell Varco, L.P. | Coiled tubing injector with limited slip chains |
| US9458682B2 (en) | 2010-09-24 | 2016-10-04 | National Oilwell Varco, L.P. | Coiled tubing injector with limited slip chains |
| US9399895B2 (en) | 2011-09-02 | 2016-07-26 | National Oilwell Varco L.P. | Coiled tubing injector head with chain guides |
| US8701754B2 (en) | 2012-06-18 | 2014-04-22 | National Oilwell Varco, L.P. | Coiled tubing injector with strain relief |
| US10995563B2 (en) | 2017-01-18 | 2021-05-04 | Minex Crc Ltd | Rotary drill head for coiled tubing drilling apparatus |
| US11136837B2 (en) | 2017-01-18 | 2021-10-05 | Minex Crc Ltd | Mobile coiled tubing drilling apparatus |
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