US2247188A

US2247188A - Screen and liner puller

Info

Publication number: US2247188A
Application number: US359604A
Authority: US
Inventors: Davis Louis
Original assignee: RAY H HOSTUTLER; SAMUEL J BLYTHE SR
Current assignee: RAY H HOSTUTLER; SAMUEL J BLYTHE SR
Priority date: 1940-10-03
Filing date: 1940-10-03
Publication date: 1941-06-24
Anticipated expiration: 1958-06-24

Description

June 24, 141. L. DAVIS SCREEN AND LINER FULLER Filed Oct. 5, 1940 2 Sheets-Sheet l June 2%, 1941. L. DAVIS SCREEN AND LINER FULLER Filed Oct. 3, 1940 2 SheetsSheet 2 Patented June 24, 1941 SCREEN AND LINER FULLER,

Louis Davis, Corpus Christi, Tex., assignor oi onethird to Samuel J. Blythe, Sn, and one-third to Ray H. liostutler, both or Corpus (Jliristi,

Tex.

Application October 3, 1940, Serial No. 359,604

llll' Claims.

This invention relates to a novel device for pulling screens and liners from oil well casings,

- and more particularly to a device having means for readily raising a screen and liner which is I upward pull. A screen and liner must be pulled because of sand which has entered the lower part of the casing through perforations therein clogging the screen and preventing passage of oil therethrough. The sand frequently packs around the screen so tight that it is very diflicult to start the initial upward movement of the liner and screen thereby putting an extreme strain on a derrick attempting to pull the liner and screen, frequently resulting in the derrick being pulled down.

It is an aim oi this invention to provide a screen and liner puller which will operate on a different principle to produce the initial upward movement of the liner and screen by a turnbuckle action whereby one section of the screen and liner puller will be raised relatively to the other section by turning a drill stem to which the pulling tool is attached for thereby raising the screen and liner relatively to the casing without applying a direct pull to the tool.

More particularly, it is an aim of the invention o provide a screen and liner pulling tool including sections connected by a rod or tube having a ri ht hand threaded portion for engaging one of the sections and a left hand threaded portion for engaging the other section, said rod being connected to mandrels associated with the sections and movably mounted relatively thereto for setting slips carried by the sections for clamping the upper tool section in the casing and the lower tool section in the liner and screen.

Still another aim of the invention is to provide a pivotally mounted blade carried by the lower section for punching holes in the liner when said section is moved upwardly and downwardly within the liner for providing apertures through which mud can be expelled into the casing below the upper end of the liner during the upward movement of the liner and screen.

Other objects and advantages of the invention will hereinafter become more fully apparent from the following description of the drawings, which illustrate a preferred embodiment thereof, and wherein:

Figure 1 is a longitudinal vertical sectional view, partly in elevation, showing the tool in an engaged position in the casing and liner and screen,

Figure 2 is a similar view showing the tool released,

Figure 3 is an enlarged fragmentary vertical sectional view of the upper portion of the tool sh'own clamped to the casing,

Figure 4 is an enlarged fragmentary vertical sectional view of the lower portion of the tool shown clamped to the liner and screen,

Figures 5 and 6 are transverse sectional views taken substantially along the planes ofthe lines 5-5 and t-5, respectively, of Figure 3, and

Figure l is a transverse sectional view taken substantially along the Figure 4.

Referring more particularly to the drawings, wherein like reference characters designate like or corresponding parts throughout the different views, it designates generally the lower portion of a conventional oil well casing which is disposed within a well, not shown, and which is adapted to be cemented on its outer side thereto. The lower end of the casing it is adapted to be embedded in the oil sand, not shown, of the oil well, and the embedded portion thereof is provided with perforations, ii. The casing ill is provided with a conventional valve l2 in its lower end. A conventional liner and screen is designated generally it and includes a screen it which is disposed at the lower end thereof and within the lower end of the casing it, a liner l5 which is attached at its lower end to the upper end of the screen it and a packer it, the lower end of which is in threaded engagement with the upper end of the liner it. The exterior diameter of the packer it is greater than the ex terior diameters of the screen and liner it and i5, respectively, and is substantially eqr al to the bore of the casing it! which it is adapted to snugly engage. The screen it and liner it, on the other hand, are disposed in spaced apart relationship to the inner wall of the casing it, as illustrated in Figures 1 and 2. The parts previously described are of conventional construction and are shown merely to illustrate the use of the screen and liner puller, designated generally H, and comprising the invention.

The tool ll includes an upper tool section it and a lower tool section it, which is smaller in diameter than the tool section it, for a purpose which will hereinafter become apparent.

Referring particularly to Figure 3, the tool section it which is adapted to be disposed in the casing it, when in a lowered position, includes plane of the line l--l of a barrel 20 having an open upper end and a closed lower end which is provided with a bore 2| extending therethrough and which is provided with a left handed thread. Barrel 2515 provided with leaf springs 22 which are connected to the outer side thereof at their lower ends by fastenings '23 and which extend longitudinally of the barrel 20. The intermediate portions of the springs 22 are bowed outwardly for engaging the inner surface of the casing ill for holding the tool section l8 substantially in concentric relationship to the casing Ill.

Adjacent its upper end, the barrel 29 is provided with circumferentially spaced longitudinal slots 24 through which project slips 25 which are provided at their outer edges with downwardly directed teeth 26. The slips 25 are provided with downwardly and inwardly inclined cam faces 21 on their inner edges and with depending lugs 28 which are disposed within the barrel 20. A leafspring 29 is connected at its upper end to each of the lugs 28 and extends downwardly and outwardly therefrom and is suitably attached at its lower end to the inner side of the barrel 20. The leaf springs 29" normally urge the slips 25 inwardly of the barrel 20 and out of engagement with the inner surface of the casing III, as best seen inFigure 2.

A hollow mandrel 30 is provided with a conical tapered lower end 3| and an upper end provided with a restricted opening 32 in which is slidably disposed a sleeve 33. The sleeve 33 is provided with spaced outwardly projecting collars 34 disposed one above and one beneath the upper end of the mandrel 30 for restricting the sliding movement of the sleeve 33 relatively thereto. As best seen in Figure 3, the mandrel 3D is adapted to be normally disposed in the upper end of thebarrel 20 and to be movable relatively thereto so that on the downward movement of the mandrel 30 relatively to the barrel 2!] its portion 3i will engage the cam faces 21 to project the slips 25. l

The sleeve 33 is provided with a restricted upper end provided with a right hand thread 35 for engaging the lower threaded end of a drill stem 36. The sleeve 33 is provided with a bore which extends longitudinally therethrough and which communicates with the passage of the drill stem 35. The bore of the sleeve 33 includes an enlarged cylindrical portion 3l, adjacent the lower end thereof, a restricted tapered portion 38 therebeneath, having a left hand thread, and an elongated portion 39 above the portion 31 which is square in cross section.

A hollow rod or tube, designated generally 40, is provided with a head 41 at its upper end having an upper portion 42, which is square in cross section, and a lower tapered portion 43 which is provided with a left hand thread for engaging the threaded portion 38. The rod 40 adjacent its upper end is provided with a left hand threaded portion 44 which engages the thread of the openin 2 I.

The lower tool section is, as best seen in Figure 4, includes a barrel 45' which is substantially smaller in diam'eter than the barrel 20 and which is open at its upper end and provided with a tapered lower end having a right handed thread 46. The lower end of the barrel 45 is also provided with a restricted tapered opening ll provided with a right hand thread. Barrel :45 is provided with springs 22 corresponding to the springs of the barrel 20 for holding the tool section I9 in spaced apart, concentric relationship to the inner wall of the liner and screen I3. The

barrel 45 is also provided with a set of slips 25' correspondingto the slips 25 except that the teeth thereof, designated 26', are directed upwardly and that the slips 25' are not provided with the cam faces 21. Slips 25' are supported and normally held in retracted positions by means of leaf springs 29' which are attached at their lower ends to the inner side of the barrel 45 and at their upper ends to the inner edges of the slips 25'.

A tube 48 is disposed in the barrel 45 and is provided with a tapered lower end which is provided with an external right hand thread 49 for engaging the threaded portion 4! for holding the tube 48 in a lowered, retracted position. Tube 48 is provided intermediate of its ends with any enlarged portion forming a mandrel 50 which is square in cross section and the sides of which taper toward the upper end of the tube 48. The mandrel 59 is disposed below the slips 25 when the portions 41 and 49 are in engagement so that the slips 25 will be held by their springs 29 in retracted positions, as seen in Figure 2. The upper end of the tube 48 is provided with an internal right hand thread 5| for engaging the externally right hand threaded lower end of an insert 52 which is provided with a bore 53 extending longitudinally therethrough and which is provided with a right hand thread. The lower end of the rod 40 is provided with a right hand threaded portion 54 for engaging the threaded bore 53.

A sleeve 55 is provided with an internally threaded flared upper end 56 which attached to the tapered threaded portion 66 for connecting the sleeve 55 to the lower end of the barrel 45. Sleeve 55 intermediate of its ends, is provided with a frame 57, the longitudinal bar 58 of which is pivotally connected at 59 to one end of a blade 56 which extends outwardly of the sleeve 55 through a longitudinal slot St. The blade 59 is provided with teeth 62 on its outer, free end. A contractile coil spring 33 is attached at one end to the knife 69 and at its opposite end to the upper bar 6% of the frame 51 for urging the knife 59 upwardly. A contractile coil spring 65 is connected to the knife 69- at one end and to the lower bar 54 at its opposite end for urging the knife 50 downwardly. The

springs

53 and 65 are so tensioned that the knife blade 50 will normally assume an upwardly inclined position, as illustrated in Figure 4.

Assuming that the threaded portion 49 is in engagement with the threaded portion ll to hold the mandrel 55 in a retracted position, that the threaded portion 43 is in engagement with the threaded portion 38 to hold the mandrel 30 in a retracted position, and that the sleeve 33 is connected to the drill stem 35, the too-l H with the parts thus positioned, as seen in Figure 2, can be lowered into the casing Ill, and the slips 25 and 25' will be in retracted positions so that the tool H can be moved downwardly until the tool section I9 is in the liner and screen l3. An upward pull on the drill stem, after .it has reached its fully lowered position, as seen in Figures 1 and 2, will cause the knife or blade 69 to assume the position, as seen in Figure 1, to punch a hole in the liner l5 and a further upward pull will cause the knife 60 to assume its lowermost, dotted line position, of Figure 4. A downward movement on the drill stem 36 and tool I! will cause the knife 60 to return to its intermediate, dotted line position of Figure 4, to punch another hole in the liner l5 and this operation can be repeated tighter.

to punch as many holes as desired in the liner II, for a pu pose which will hereinafter be described- 'After a suiilcient number or holes have been punched in the liner I! by the knife or blade II the drill stem is turned to the left to turn the sleeve 33, barrel I0, rod 40, insert 52, and tube 40, all to the left to unscrew the portion 49 from the portion 41. This will be accomplished rather than the stem 36 being unscrewed from the sleeve 33 due to the fact that there is more weight on this threaded connection and also due to the fact that this threaded connection can be made When the threaded portion 49 is detached from the portion 41 stem 38 and tool section i8 can be raised to raise the tube 48 to cause the mandrel 50 to set the slips 25' in either the packer it or the liner I! to thereby secure the tool section 19 to the screen and liner IS. The stem 36 is then turned in the opposite directionor to the left to unscrew the portion 38 of the sleeve 33 from the threaded portion it of the head 41. By then slacking off on the drill stem 36 sleeve 33 will move downwardly to force the mandrel 3t downwardly to expand and set the slips 2! in the casing ll). During these operations the portions M and 54 of the tubular rod on are in extended positions relatively to the barrel Mend the insert 52, respectively. As the sleeve fit is moved downwardly to set the slips 25 the lower portion of the square bore portion 53 will move into engagement with the square portion 32 of the head ti to key the sleeve iii? to the rod to. The drill stem 36 is now turned to the right to cause the threaded portion M to move inwardly of the barrel 2t and the threaded portion M to move inwardly oi the insert 52. The square cross sectional shape of the mandrel M will prevent the tube 48 from turning relatively of the barrel 45 during this operation. As the rod is drawn inwardly of both the tool sections and as the tool section it is held against movement relatively to the casing ill by the slips 25 and the tool section it is similarly held against movement relatively to the liner and screen it by the slips 25', the liner and screen it will be drawn upwardly relatively to the casing in. After this upward movement has been continued to the limit of the rod Ml stem at is pulled upwardly to raise the sleeve 33 and the mandrel it to release the slips 25 and the upward pull is then continued to draw the liner and screen it out of the casinglll. Should the liner and screen it still be stuck in the sand at the bottom of the casing ill so that it cannot be pulled by an upward movement, the drill stem 36 is turned in a counterclockwise direction to turn the rod m to the left to cause its portions M and M to be screwed out of the portions 2i and 53 back to their original, extended positions. During this movement the head ti is sliding downwardly from adjacent the top of the portion it to the position, as seen in Figure 3, and the tool section it is being raised relatively to the casing in. By again slacking oiT on the drill stem tilt the mandrel 30 can be lowered to reset the slips 25 after which the drill stem at can be again turned to the right to repeat the operation of drawing the liner and screen ltupwardly. Assuming that the liner and screen is now released from the sand in the bottom of the casing it, an upward pull on the stem 36 will release the mandrel 3D and the slips 25 so that the screen and liner l3 may be pulled with the tool i! from thecasing ill. As the liner and screen it moves upwardly its packer is will swab the inner surface of the casing It so that the mud thereon will flow down through and into the screen and liner l3. In order to take care of this mud, a cleaning fluid is discharged through the drill stem 36, through sleeve 33 and the bore of the rod 40, through the bore 53 of the tube 48 into and through the bmrel 45 of the sleeve 55 from where it screen l3 to flush the mud out through the openlngs formed by the blade 60 and it is for this purpose that the blade is provided.

Should it be desired to remove the tool I! from the liner and casing this can be accomplished by releasing the slips 25, as previously described, by an upward movement on the stem 36 after which the stem can be turned to the left to screw the portion 43 into the portion-38 to lock the mandrel 30 in a retracted position. By then slacking off on the drill stem 36 tool section it will move downwardly to force the tube 48 downwardly, after which the stem 36 is turned to the right to connect the portions l9 and 47 to lock the mandrel 50 in a retracted position so that an upward pull on the drill stem 36 will withdraw the tool M from the casing ill and the liner and screen it.

Various modifications and changes are contemplated and may obviously be resorted to as only a preferred embodiment of the invention has been disclosed.

I claim as my invention:

1. A screen and liner puller comprising a tool having an upper and a lower section, slips carried by each of the sections, mandrels slidably mounted relatively to the sections for setting the slips of the lower section in a liner and the slips of the upper section in a well casing, in which the liner is disposed, and means connecting said sections, said means being tumable in one direction for drawing the sections toward one another for raising the lower section to raise the screen and liner relatively to the casing.

2. A device as in claim 1, said means including a rod having a left hand thread at one end and a right hand thread at the opposite end, said tool sections having threaded portions for receiving said threaded ends and for adjustably connecting the tool sections.

3. A device as in claim 1, comprising resilientguide members disposed on the outer sides of the sections for engaging the liner and casing for holding the sections in spaced apart, substantially concentric relationship thereto.

4. A device as in claim 1, said means including a rod having a left hand'threaded portion and a right hand threaded portion for engaging threaded portions of the upper and lower tool sections, respectively, a sleeve member attached to the lower end of a drill stem and swivelly connected to the mandrel of the upper tool section, means on the rod disposed in the sleeve, and said sleeve being movable relatively to the rod for causing the sleeve to be keyed to said means for turning the rod when the drill stem is revolved.

5. A screen and liner puller comprising a tool formed of upper and lower tool sections, slips carried by each of said sections, mandrels movably mounted in said sections for setting the slips, and means for connecting the sections in spaced apart end to end relationship, said means being rotatable for moving the sections toward one another.

6. A device as in claim 5, comprising a pivotally mounted blade carried by the lower section for punching holes in the liner when said section is raised and lowered relatively thereto.

is discharged into the liner and 'I. A screen and liner puller comprising a tool including upper and lower tool sections, a set of slips mounted in each of said sections, a tubular member slldably mounted in the lower tool section, a mandrel carried by said tubular member,

threaded means provided in the lower section and on the lower end of the tubular member for holding the mandrel in a retracted position, a rod having a left handed threaded portion forengaging a threaded portion of the upper tool section, and'a right handed threaded portion for engaging a portion of said tubular member, a sleeve connected to the lower end of a drill stem, said rod havingia head on its upper end loosely disposed in the sleeve for keying the head to the sleeve when theparts are disposed in certain positions, said head being slidably mounted relatively to the sleeve, and a mandrel swivellyand siidably connected to the sleeve for setting the slips of the upper tool section.

8. A tool as'in claim '7, said sleeve being provided with a bore having an enlarged portion having a squared portion in one end thereof and a threaded portion at the opposite end thereof, and

said head having a. square end for engaging the squared portion and a threaded end for engaging the threaded portion of the sleeve.

9. A screen and liner puller comprising a tool having spaced'tool sections, slips carried by said sections, mandreis slldably mounted relatively to the sections for setting the slips, spring guide members disposed on the outer sides of the sections for guiding the sections in their movements relatively to the liner and screen, and a casing, and means connecting said sections in spaced apart end to end relationship, said means being rotatable for drawing the sections inwardly of one another.

10. A screen and liner puller comprising a tool formed of tool sections, members mounted in said sections to move inwardly and outwardly relativeiy to the sections for connecting one section to a casing and the other section to a screen and liner, means for projecting the members, and means connecting the sections and movable relatively thereto for moving the sections relative- LOUIS DAVIS.