|Publication number||US2255451 A|
|Publication date||Sep 9, 1941|
|Filing date||Jul 27, 1938|
|Priority date||Jul 27, 1938|
|Publication number||US 2255451 A, US 2255451A, US-A-2255451, US2255451 A, US2255451A|
|Inventors||Otis Herbert C|
|Original Assignee||Otis Herbert C|
|Export Citation||BiBTeX, EndNote, RefMan|
|Referenced by (8), Classifications (8)|
|External Links: USPTO, USPTO Assignment, Espacenet|
Sept. 9, 1941. H 'Q 0T|s 2,255,451
wELL DEVICE v Filed July 27, 1958 l 2 Sheets-Sheet l vlll E H. C. OTIS WELL DEVICE Sept. 9, 1941.
Filed Juiy 27, 1958 I 2 sheets-sheet 2,
. Patented Sept. 9, 1941 sTATEs PATENT oFiFlcE WELL DEVICE Herbert '0. otis, Dallas, Tex.
Application July 27, 193s, serial No. 221,578 22 claims. (cl. 1st- 12) This invention relates to new and useful improvements in well devices. A
One object of the invention is to provide an improved well device for sealing oi the annular I space between a well casing and a well tubing,
whereby the flow of well liquid is directed upwardly through the Well tubing.
An important object of the invention is to provide an .improved well device including a packer which is normally mounted on the well tubing and.
whereby the weight of the well tubing string need not be utilized to move and hold 'the element in sealing position; said. packing also ybeing retractible from its sealing position by equalization of uid pressure thereacross, whereby the strain placed on the tubing in pulling the element from its sealing engagement with the casing wall, as is the usual practice, is eliminated.
Another object of the invention is to provide an improved well packer having a duid-pressure actuated packing element and means for shutting off the fluid pressure from the element, while the device is being lowered through-the well casing, whereby accidental or unintentional distortion of the element into sealing position is positively prevented.
A further object of the invention is to provide an improved packer, of the character described, wherein the well tubing is capable of 'a limited movement with relation to the packer, whereby in the event the well connections become broken A construction designed to carry out the invention will be hereinafter described, together with other features of the invention.
The invention will be more readily understood from a reading of the following specincation and by reference to the accompanying drawings, in
which an example of the invention is shown, and wherein: l
Figure 1 is a view, partly in elevation and partly in section, of a well device, constructed in accordance with the invention and showing the same being lowered through a. well casing,
Figure 2 is a similar view showing the packing element of the device in its set position,
Figure 3 is an enlarged transverse, vertical, sectional view of the packing element and its associate parts,
Figure 4 is an enlarged horizontal, cross-sectional view taken on the line 4-4 of Figure 1,
Figure 5 is an enlarged horizontal, cross-sectional view taken on the line 5--5 of Figure 1.
l Figure 6 is an enlarged horizontal, cross-sectional view taken on the line 6-6 of Figure 1,
Figure 'l is a horizontal,.crosssectional view taken on the line 'I-I of -Fig'ure 2, and- Figure 8 is an enlarged isometric view of thesu'spension collar which connects the tubing with the packing assembly.
In the drawings, the numeral I0 designates an elongate mandrel having anl axial bore II extending therethrough. The upper portion of the outer surface of the mandrel is substantially cylindrical and a slip supporting sleeve or carrier I2 is slidable longitudinally on this portion. Acollar I0' is threaded on the extreme upper'end of the mandrel and limits'the upward movement of the sleeve on said mandrel. The sleeve I2 is' formed with an outwardly directed,v annular and the well pressure is uncontrolled, the packer means of a suitable fishing tool, or other means.
flange I3 and an external collar I4 is preferably made integral with its lower end. 'I'he collar has a plurality of radial slots I5 therein (Figures 1 and 4), which slots are spaced equidistant there;I
around andthe upper ends of gripping elements I6 are inserted within the slots. Each slot is substantially T-shape and the upper end of each gripping element has a. cross-arm I6', wherebythe elements are suspended from the collar Il. Outward displacement ci' the upper ends of said elements 'is prevented by a retaining ring I'I which is inserted within an annular groove I 8 provided on the exterior of the collar I 4. Since the sleeve I2 is slidable on,the,mand rel, the gripping elements I6 are movable longitudinally on said mandrel and are also capable of limited lateral or radial movement with relation thereto.
The sleeve I 2 is formed with an L-slot I9 which is located between the flange I3 and collar I4 and a radial pin 20 extending outwardly from the exterior of the mandrel I engages within this slot and connects the mandrel and sleeve. W'hen the pin is within the lateral or horizontal portion ISa of the slot, the sleeve I2 is in a raised position on the mandrel and said sleeve and mandrel are movable as a unit. By rotating the mandrel to aline the pin with the vertical portion I9b of the slot, said mandrel may be moved upwardly with relation to the sleeve, the pin traveling upwardly in the slot. To hold the sleeve stationary when the mandrel is moved upwardly therethrough, a plurality of friction springs 2| have their upper ends fastened to the collar I4 between the gripping elements I6 and are bowed outwardly to frictionally contact the inner wall of the well casing A.
The outer surface of the lower portion of the mandrel II) is iiared or inclined outwardly to form a slip expanding portion 22. Each gripping element I6 includes an arcuate slip 23 made integIal with its lower end and the outer surface of each slip is formed with the usual gripping teeth. The inner surface of each slip contacts the inclined surface 22 of the mandrel and manifestly, as the slip carrier or sleeve I2 moves longitudinally of the mandrel, the slips. are moved radially of said mandrel. When the slips are at the lower end of the inclined portion 22, said slips are in -an expanded position and the gripping teeth thereof are adapted to engage the inner wall of the well casing A, as will be explained.
The lower portion of the mandrel IIJ is' enlarged below the slip expanding surface 22,
whereby an external, annular shoulder 2l is formed. The lower end of the bore II of said mandrel is also enlarged at II' to provide an internal, annular shoulder 25 and this enlarged portion of the lbore is internally screw-threaded to receive the upper end of a supporting sleeve 26. A flexible packing element or sleeve 21 surrounds the supportingsleeve and has its upper reduced end coniined within an annular recess 28 which is provided in the extreme lower end of the mandrel. 'Ihe lower end of the packing element is reduced and disposed within a thimble 29 which has an axial screw-threaded bore 30, whereby said thimble may be attached to the lower end of the supporting sleeve 26. It is noted that the lower end of the bore 30 is reduced to form an internal shoulder 30', against which the lower end of the sleeve 26 may abut and it is preferable that the diameter of this reduced portion of the `bore be substantially the same as the diameter of the bore of said sleeve.
-When the ilexible packing element 21 is in a normal, undistorted position its bore 21' engages the exterior surface of the supporting sleeve 26 and its outer surface is retracted from the wall of the well casing A, as shown in Figures 1 and 3. The sleeve 26 is formed with a plurality of radial ports 3| which are spaced radially and longitudinallythereof, and manifestly, when a pressure is present within the bore of the sleeve 26, such pressure will act through the ports against the packing element 21, whereby said element is distorted or moved to a sealing position with its outer surface engaging the wall of the well casing A (Figure 2). When the pressure within the sleeve 26 is relieved or is less than the pressure exteriorly of the packing element 21,
' then the inherent resiliency of the material of which the element is constructed returns said element to a retracted or undistorted position.
The usual well tubing B which extends axially through the well casing A passes through the bore II of the mandrel I0 and its outer vdiameter is substantially the same as the diameter of the bore. The tubing extends downwardly through the supporting sleeve 26 and has its lower end provided with external screw threads, which are preferably left-handed threads. A suspension collar 32 which is arranged to be detachably connected to the lower end of the sleeve 26 of the packer assembly, as will be explained, has the upper end of its bore formed with complementary left-hand screw threads to receive the lower end of the tubing. Since the bore of the mandrel is enlarged at its lower end and also since the sleeve 26 is secured in this enlarged portion Il', it will be obvious that an annular space 33 /is provided between the tubing and the sleeve.
For packing off between the well tubing B an the bore Il of the mandrel, a pair of spaced, an-
nular grooves 34l are formed in the wall of the mandrel bore above the internal shoulder 25.
A pressure seal packing ring 35, constructed of exible packing material, is inserted in each groove and has its inner periphery engaging the exterior of the well tubing. The bottom of each ring is V-shape in cross-section, whereby a pressure from below said rings will tend to distort said rings into tighter sealing engagement with the tubing. The packing rings 35 eficiently pack off around the tubing, while permitting a vertical or sliding movement of the tubing through the mandrel without breaking the seal.
As has been explained, the lower end of the tubing B is screw-threaded into the upper -end of the suspension collar -32 which collar is formed with a radially extending lug or projection 36 (Figure 8), which is preferably angular in crosssection. The lug is located near mid-height on the exterior of the collar and is adapted to engage within an inverted L-shaped slot 31 which is provided in the bottom of the supporting sleeve 26, as is clearly shown in Figure 3. The slot has a horizontal or lateral portion 31a and a. vertical portion 31b, the latter being open at its bottom and, manifestly, when the lug is within the horizontal portion, the collar 32 is immovable with relation to the thimble 29 and packer assembly. By rotating the collar 32 to aline the lug 36 with the vertical portion 31h of the slot 31, the collar may be moved downwardly from the Ibore of the sleeve 26 and thimble.
The external diameter of the *collar is substantially the same as the diameter of the bores of the sleeve 26 and thimble and when locked in position, with the lug 36 engaging the horizontal portionV 31a of the slot, the upper portion of the collar is within the sleeve and thimble, while the lower end of said collar projects therefrom. To pack oir between the upper portion of the collar and the bore of the sleeve.26, the collar has an external annular groove 38' which receives a suitable packing ring 38. The outer periphery of said ring engages the. bore of the sleeve and prevents pressure from below the packer assembly from entering the annular space 33 between the tubing and sleeve. Thus, when the collar is locked in position within the sleeve 26 and thimble 29, the well pressure from the well casing below the packer cannot enter the sleeve to distort the packing element 21 into sealing position. The lower end of the bore of the suspension collar 32 is screw-threaded and the upper end of a length of pipe or tubing 39 vtance of pressure from below the device.
is secured thereto. The lower end of this pipe is perforated, as shown atl t0,v or the usual well screen (not shown) may be connected thereto. With such arrangement, it is manifest that the well liquid may enter the perforations 40 and ow upwardly through the pipe 39, collar 32 and well tubing B to the surface.
In operation, the packer assembly is mounted on the well tubing B and is connected thereto by means of the suspension collar 32, to which the lower tubing end ofthe tubing is attached by means of the left-hand threads. The radial lug 36 on said collar is engaged within the horizontal portion 31a of the L-shaped slot 31, in the lower end of the sleeve 26, and as the tubing is run downwardly into the well, the mandrel I and packer assembly carried thereby is moved with saidl tubing. At this time, the gripping slips 23 are in their retracted position with the slip carrier sleeve I2 being held in its uppermost position on the mandrel I by the radial pin 20 on the mandrel engaging within the horizontal portion I9a of the slot I9 in said sleeve. Thus, the tubing is utilized to run the .device into the well casing A and during the lowering operation, the slips are retracted.
The packing element 2l is also in its normal or undistorted position during such lowering operation since pressure cannot enter the bore of the supporting sleeve 26 because the packing ring 38 on the suspension collar 32 prevents admit- Any pressure within the well casing A will act on the past the sealing rings 35 and such leakage would' result in a pressure within the sleeve 2S. This slight pressure is desirable during lowering of the device to obviate the danger of the pressure, acting against the exterior of the element 2l, forcing and distorting said element through the openings 3l. However, it isnoted that a relatively high pressure outside the element 2l would be necessary to accomplish this and under ordinaryconditions, it would make no difference whether or not a pressure is present within the sleeve 2S during the lowering 0f the device.
When the assembly has been lowered within the casing to the position atv which the packing element 2l is to be set, the tubing B is rotatedl in a clockwise rotation in Figure 7, which rotates the' suspension collar 32 to move the lug 36 on said collar to the end of the horizontal portion 31a of the slot 31 .in the sleeve 26 and alines said lug with the vertical portion Slb of the slot. At this time, the mandrel l0 and slip carrier i2 are held against rotation by the friction springs 2l on said carrier. When the lug 3B strikes the end wall of the slot 3l, further clockwise rotation of the tubing B will impart a rotation to the mandrel l0 and as said mandrel Uil rotates, the radial pin thereon moves to the end of the horizontal portion i911 and is alined 'with the vertical portion iSb of the slot i3 in the slip carrier sleeve l2, said sleeve being held against rotation by the friction springs 2l. As soon as the pin 20 is alined with the vertical portion of the slot I 9, the tubing is raised, whereby the mandrel Ill is moved upwardly with relation to the sleeve i2, the pin moving upwardly in the slot i9. Upward movement of the mandrel with relation to the sleeve raises the inclined slip expanding surface 22 between the gripping elements I6, whereby the slips 23 are moved radially outward to engage their gripping teeth with the wall of the well casing A. Engagement of the grippingteeth with the casing prevents further upward movement ofthe mandrel Ill and tubing B and since the well pressure is acting against the bottom ofthe packer assembly, said assembly is locked in the well casing. It is noted that during the locking operation, the suspension collar 32 is within the lower end of the sleeve 26 and the packing ring38 prevents admittance of pressure into said sleeve.
After the assembly is locked within the casing A by the slips 23, the tubing B is moved downwardly through the mandrel. Suchdownward movement is permitted since the lug 36 on the collar 32 has previously been alined with the vermandrel may enter the annular space 33 between louter surface of the undistorted packing element the sleeve 26 and 'tubing B. 'Ihis pressure cannot pass upwardly through the bore Il of the mandrel because of the pressure seal packing rings 35 and, therefore, such pressure is confined within the space 33, whereby it acts through the opening 3l against the inner surface 0f the packing element 2li to distort the sameinto sealing position. When in sealing position, the outer surface of the element 2l engages the wall of the well casing and, manifestly, the well fluids cannot pass upwardly thereby, Neither can the fluids flow upwardly through the bore of the mandrel, l
and therefore, said fluids enter the perforations l0 and pass upwardly through the pipe 39 and well tubing B to the surface.
With" the packing element in its set position, the tubing B may be moved vertically through the assembly and the packing rings 35 hold the seal during such movement. This makes it possible to position the perforations d@ opposite the desired strata in the well bore after the packer has been set. To permit maximum movement of the tubing, ush joint tubing may be employed. If theusual external couplings are used in the tubing string, then the movement of the tubing is limited to the length of one section as the coupling (not shown) rst above the mandrel will strike the cap i u at the upper end of the mandrel to limit further downward movement. It is noted that when outside couplings are employed, it is desirable that the distance from the assembly in its set position to the bottom of the well bore be greater than the distance from the top of the mandrel to the iirst coupling thereabove, whereby said coupling will strike the mandrel before the lower end of the pipe 39 strikes the bottom of the hole.
When it is desired to remove the packer, the pressure across the packing element 2 is equalized by creating a pressure above and exteriorly of the element, which is equal to the pressure below and within the element. This may be done by pumping a pressure fluid downwardly into the well casing from the surface or by by-passing the well pressure from below around the packer. This latter method, which is that of by-passing the well fluid pressure around the element will be hereinafter explained.
When a pressure` uid is pumped downwardly into the casing to create a pressure eXteriorly of the element, such pressure 'may be equal to, or
greater than, the pressure within the element. If said pressure is greater, it will tend to force the element inwardly from sealing position, whereby the inherent resiliency of said element need not be depended upon to retract the same. The well tubing B is then raised to lift the suspension collar 32 so that its lug 36 enters within the vertical portion of the slot and moves upwardly therein.
Rotation of the tubing in a counter-clockwise.
direction (Figure 7) moves the lug 36 into the horizontal portion of the slot to again connect the tubing and mandrel. It is noted that as soon disengage from the casing A. When the mandrel I has moved downwardly a suilicient distance to lower the pin to th'e bottom of the vertical portion I9b of the slot I9, said mandrel is rotated to engage the pin within the horizontal -portion I9a of said slot, whereby the carrier sleeve I2 is again locked to the mandrel to lock the slips in a retracted position. The tubing may then'be raised and the entire assembly removed from the well casing A.
If for any reason the teeth of the slips 23 have become so iirmly engaged with the casing wall that it is not possible to disengage them by connecting the collar 32 to the sleeve 26 and thereby permitting the weight of the tubing to act downwardly on the mandrel through the pin 36, then the collar 32 may be disengaged and the tubing lowered until the tubing coupling first above the mandrel strikes the collar I0 at the upper end of the mandrel. The weight of the tubing string may then be utilized to jar downwardly on the mandrel to release theslips, after which the collar 32 is re-engaged with the slot .31 and the slips locked in a retracted position, as
has been explained, whereby removal of the device may be accomplished.
The lug 36 on the collar 32 may be accidentally sheared or broken oi with the result that the connection between the collar and mandrel, as above described, could not be made. To provide an auxiliary means of connection, the collar 32 has a plurality of upstanding projections or lugs 4I which are arranged to engage within complementary slots or recesses 42 (Fgure 3) formed in the internal shoulder 25 in the bore of the mandrel I0. If the lug 36 is broken oii or sheared, then in removing the assembly from the casing,
projections 4I engaging the recesses 42. After the tubing is removed, a suitable shing tool or jar (not shown) may be run into the casing. The tool may be engaged beneath the ilange I3 on the carriersleeve I2 and the mandrel may be jarred downwardly by suitable means. After the slips are released, the fishing tool is raised upwardly which raises the sleeve I2 on the mandrel and engages said sleeve with the collar I0 on the upper end of said mandrel. The assembly may thus be lifted to the surface.
The foregoing description ofthe invention is explanatory thereof and various changes in the size, shape and materials, as well as in the details of the illustrated 'construction may be made,
within the scope of the appended claims, without departing from the spirit of the invention.
What I claim and desire to secure by Letters Patent is:
l. A well device including, a tubular packer mounted on a well tubing and movable with relation thereto, means for detachably connecting said tubing and packer, whereby the tubing may be utilized to move said packer in either direction within the well, so as to locate said packer in a desired position therein, means for anchoring the packer in a sealing position within the well, whereby the tubing may be disconnected therefrom an'd moved therethrough to vary the elevation of the liquid inlet of said tubing in the well bore, and packing elements between the packer and the tubing at each end of the packer.
2. A well device including, a packer having a pressure expansible packing element, means for anchoring the packer in position within the well bore, means to admit iiuid pressure to said element to distort the same into sealing position, a well tubing extending axially through said packer and being movable with relation thereto when said packer is anchored to vary the elevation of the liquid inlet of said tubing in the \well bore, and means for locking the packer dithe tubing B is rst lowered so that its coupling (not shown) strikes the mandrel and jars the same downwardly to retract the slips 23. The tubing isr then raised until the projections 4I engage within the recesses 42, after which the mandrel III may be rotated to engage the pin 20 within the horizontal portion I9a of the slot I3 to lock the slips in a retracted position. The tubing may then be raised to remove the assembly from the casing.
If, for any reason, it is not possible to remove the packing assembly from the casing by means of the tubing B, then said tubing may be disconnected from the collar 32 by rotating the same so as to unscrew the left-hand threadconnection between the collar and tubing. During such rotation,` the collar 32 may be held against rotation either by the lug 36 engaging the slot 31 or by the rectly to the tubing.
3. A well device including, a packer having a pressure expansible packing element, means for anchoring the packer in position within the well bore, means to admit fluid pressure to said element to distort the same into sealing position, a well tubing extending axially through said packer and being movable with relation thereto when said packer is anchored to vary the elevation of the liquid inlet of said tubing in the `well bore, and means for packing off between the tubing and packer to prevent leakage therebetween.
4. A well device including, a packer having a pressure expansible packing element, means for anchoring the packer in position within the well bore, means to admit iluid pressure to said element to distort the same into sealing position, a well tubing extending axially through said packer and being movable with relation thereto when said ypacker is Aanchored to vary the elevation of the liquid inlet of said tubing in the well bore, and means carried by the tubing for shutting off the admission of fluid pressure to the element during the lowering of the packer in the well bore and being arranged to be moved when the tubing is moved relative to the packer after the latter is anchored to admit fluid pressure to said packing element for expanding the same.
v5. A well device including, a tubular mandrel, a flexible packing element on the mandrel, means for detachably connecting the mandrel to a well tubing so that such tubing may be utilized to move the mandrel in either direction within a well casing so as to locate said mandrel and packer in a desired position therein, means carried by the mandrel for locking said mandrel in a set position in said well casing, whereby the tubing may be disconnected from the mandrel and moved therethrough to vary the position of the liquid inlet of the tubing in the well, and packing elements between the packer and the tubing at each end of the packer.l
6. A-well packer including, a mandrel, a distortable packing element carried by said mandrel, means for slidably connecting a well tubing to said mandrel whereby said tubing may be utilized to lower the mandrel through a well casing, means on the mandrel for positively anchoring said mandrel and packing element in the casing, and means to admit a iiuid pressure `tothe packing to distort the same into sealing position.
7. A well device including, a well tubing, a tubular packer mounted on a well tubing and movable with relation thereto, means for detachably connecting said tubing whereby the tubing may be utilized to lower said packer inthe well, means for positively anchoring the packer in a sealing position within the well, whereby the tubing may .be disconnected therefrom and moved therethrough to vary the elevation of the liquid inlet of said tubing in the well bore, and means for shutting 01T the admission of iiuid pressure to the packer during the lowering operation to prevent premature setting thereof.
8. A well packer including, a tubular mandrel, a distortable packing element surrounding the mandrel and arranged to be distorted by a pressure within the bore of the mandrel, means for lowering the mandrel into a well casing and locking the same therein, and removable means for closing the lower en-d of the bore of the mandrel during the lowering operation to prevent distortion of the element during such lowering.
9. A well device including, a packer having a pressure expansible packing element, means for anchoring the packer in position within the well bore, and means to admit a fluid pressure to said element to distort the same into sealing position after the same is anchored, a well tubing extending axially through said packer and-being movable with relation thereto when said packer is anchored to vary the elevation of the liquid inlet of said tubing in the well bore, said last named means being carried by the tubing and being movable thereby after the mandrel is locked in the casing to open the lower end of the bore of the mandrel to permit the well pressure to distort the packing element.
l0. A well device including, an expansible packer having a passage extending therethrough for a well tubing, locking means for engaging the side wall of the well movably carried by the packer and connected therewith so as to be set and released thereby, and means detachably connected with the packer for coupling a well tubing thereto. whereby the tubing may be utilized to move the packer in either direction and to set and release the packer or to be freely moved longitudinally downwardly from its original pointof connection with the packer when the pack-er is-locked.
1l; In a well device, a packer, means for anand packer choring the packer in astationary packing position in a well, and means arranged to be attached to a well tubing for positively coupling the tubing with the packer, said coupling means being readily detachable whereby 4the' packer may be set and released by longitudinal movement of the well tubing and also whereby the tubing may be freely moved longitudinally downwardly from its original point of connection with the packer when said means is uncoupled, while said packer is anchored.
12. In a well device, a4 well tubing having a well fluid inlet, a packer, and means for anchoring said packer in a sealing position within a well and "against upward and downward displacement by the well iiuid, the well tubing extending axially through said packer and normally carrying the same, means for positively connecting the tubing and the packer adapted to be detached, whereby the tubing may be moved longitudinally downwardly from its original point of connection with the packer when said packer is anchored to vary the elevation of the liquid inlet of the tubing in said well bore.
13. A well device including, a duid-expanded tubular packing having a bore therethrough for the passage oi a well tubing, a coupling collar having means for connecting it to a well tubing for movement thereby, means on the collar for detachably engaging it with the packer, and
means for packing off between the collar and the packer to shut 01T the admission of well pressure fluid to the packer when the collar is engaged therewith:
14. A well deviceincluding, a mandrel, a packing means carried by the mandrel, means for engaging the side wall of the well movably carried by the mandrel and connected therewith so as to be set and released thereby, a well tubing extending axially through the mandrel and being freely movable therethrough, coacting means on the tubing and mandrel for positively connecting these parts, said means being arranged for detachment whereby the tubing may be utilized to set the well-engaging means and may' be disconnected and moved downwardly after such means is set so as to be moved therethrough. i
l5. A well device including, a well tubing, a ypacker surrounding said tubing and normally ire-ely slidable relative thereto, means for connesting the tubing and packer, whereby said tubing may be utilized to lower and raise the packer and to position the packer in a well bore, said means being arranged for detachment and means independent of the connecting means for anchoring the packer in a sealing position in the well bore, whereby the tubing may be detached from the packer and moved downwardly with relation thereto when said packer is anchored in its sealed position.
16. A well device including, a well tubing, a packer surrounding the tubing and freely slidable thereon, means for locking the packer in a sealing position in the well bore, a suspension collar carried by the tubing varranged to detachably connect the tubing and packer whereby the tubing may be utilized to position the packer in the well bore, said cllar being adapted to be disconnected from the packer after said packer is locked in sealing position, whereby the tubing is free from connection with the packer and is freely movable axially therethrough in either direction relative to thev locking means.
17. A well device wherein a tubular packer is packer adapted to be mounted on a well tubing,
means for anchoring the packer in a sealing position within the well, and a detachable connection between the packer and the tubing for freeing the tubing from the -packer so that said -tubing may be moved freely downwardly from its points of original connection with the packer when the latter is anchored and also whereby the packer may be moved in either direction when said packer is not anchored and is connected with the tubing.
19. In a well device, a well tubing having a well fluid inlet, a packer for sealing on the well outside of the tubing, means for anchoring said packer against upward and downward displacement in the well and in sealing position, the well tubing extending longitudinally through said packer and normally having a positive connection with the same and arranged to be disconnected from the packer so as to be free from any connection therewith when the same is anchored and movable longitudinally to vary the elevation of the fluid inlet below said packer, and a iiuid excluding sealing between the packer land the tubing.
20. A well device including, an elongate packer, an anchoring means movably connected with the packer, means carried by the packer for operating the anchoring means to set and release the same, a well tubing extending longitudinallyy through the packer, and means positively connecting the packer and tubing together, whereby the tubing may be actuated to set and release the anchoring means and to actuate and position the packer, said connecting means being arranged for detachment, whereby the well tubing may be freely moved longitudinally ,downwardly from its original point of connection with the packer when the packer is anchored and said means is detached from said packer.
21. A well device including, a vertically movable tubing, av packer slidably mounted on the tubing, means for anchoring saidl packer in fixed position in a weil bore, a coupling element carried by the tubing, and having means for posiltively connecting the tubing with the packer for moving said packer upwardly and downwardly through the well bore, said connecting means being readily detachable from the packer, whereby the coupling element may be detached from the packer and the tubing moved downwardly through the packer while said packer is anchored to move said coupling element below the connecting means on the packer whereupon the tubing may be moved in either direction.
22. In a well device, a packer, means for. anchoring the packer in a stationary position in a Well, a well tubing extending axially through the packer, a coupling element on the packer, means carried by the tubing and disposed to be received within and detachably connected with the coupling element for releasably coupling the tubing to the packer, whereby the packer may be moved with the tubing when the tubing and packer are Vcoupled together, and co-engageable means on said packer and said tubing operable to set said anchoring means when said tubing is moved to disconnect the tubing from the packer whereby the tubing may be moved longitudinally of the packer when said means is uncoupled while the packer is'y anchored, said coupling element being movable below the connecting means on the packer in either direction.
HERBERT C. OTIS.
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US2416842 *||Jul 1, 1941||Mar 4, 1947||Herbert C Otis||Well cementing apparatus|
|US2506680 *||Jun 10, 1944||May 9, 1950||Herbert C Otis Jr||Well packer|
|US3012611 *||Nov 30, 1953||Dec 12, 1961||Mcgaffey Taylor Corp||Well treating tool|
|US3420306 *||Dec 19, 1966||Jan 7, 1969||Brown Cicero C||Well anchor or packer|
|US4397351 *||Apr 27, 1981||Aug 9, 1983||The Dow Chemical Company||Packer tool for use in a wellbore|
|US7416027 *||Aug 13, 2002||Aug 26, 2008||Enventure Global Technology, Llc||Adjustable expansion cone assembly|
|US8201832||Sep 8, 2008||Jun 19, 2012||Cameron International Corporation||Multi-elastomer seal|
|US20100194049 *||Sep 8, 2008||Aug 5, 2010||Cameron International Corporation||Multi-elastomer seal|
|U.S. Classification||166/140, 166/179, 166/237, 277/331, 166/178|