US1810352A - Combination packer and setting tool - Google Patents

Description

June 1 (5. A. HUMASON COMBINATION PACKER AND SETTING TOOL Filed Oct. 14, 1929 M 65 MW Patented June 16, 1931 -UNIT.ED STATES:

PATENT OFFICE GRANVILLE A. H'UKASON, OF.HOUSTON, TEXAS, ASSIGNOIR OF ONE-HAM TO J. A. LOGAN, O]? HARRIS COUNTY, TEXAS COMBINATION IPACKER SETTING TOOL Application filed ctober'14, 1929. Serial No. 389,664.

This invention relates to new and useful provements in a combination packer and setting tool.

One object of the invention is to provide 6 means for locating a well screen, or other pipe, in a well bore and for forming a seal, or fluid tight joint, between said pipe and an outer pipe or casing in the bore.

Another object of the invention is to provide means whereby the outward expanslon of the packer, in setting the, same, may be limited so as to prevent inJury to the packer, or the distortion or bursting of the outer pipe or casing.

' A further object of the invention is to provide novel means for holding the packer expanded as well as novel means for releasing I said packer in case it maybe desired to withdraw the same or relocate it in the well.

Another feature of the invention resides in the provision of a novel 1; pe of expansrble packer having an expansi le, surrounding and protecting sheath.

A further feature resides in the provlsion of releasable means whereby the inner p pe, or screen, may be anchored to the outer pipe, or casing so as to be suspended from said anchoring means to prevent said screen or inner pipe from being distorted by the weight above.

With the above and other objects in v1ew this invention has particular relation to certain novel features of construction, operation, and arrangement of parts an example of which is given in this spec1ficat1on and illustrated in the accompanymg drawings, wherein Figure 1 shows a side view of the packer, and adjacent parts, in a casing and shown partly in section.

Figure 2 shows a side view of the anchorr in means, shown partly in section.

igure 3 shows a cross sectional view taken on the line 3-3 of Figure 1,

Figure 4 shows a cross sectional view taken onv the line. 4-4 of Figure 2, and Figure 5 is a sectional view of the J-tool employed.

Referring now. more particularly to the drawings, wherein like numerals of refer- 56 ence' designate similar parts in each of the figures the numeral 1 designates a casing or outer pipe, set in a well bore. The numeral 2 designates an inner pipe to be set in a well. This inner pipe may be a screenor a liner, or other pipe.

The numeral 3 designates a string of it which extends to the ground surface an y which the pipe 2 and the packer, hereinafter described, may be lowered into the well and set. A tubular nipple 4 is connected to the lower .end of said string and has the external lugs 5 spaced apart therearound. A tubular fittedinto the corresponding grooves 9, 10. 7

This packer may be formed of any suitable expansible material and may include a surrounding sheath or housing 12, formed of some such metal as lead and which will expand and will protect the packer proper from oil or foreign matter which might cause its deterioration and which will also protect said packer roper from wear or from injury while being set or withdrawn. The ends of the packer may be secured in said grooves by means of set screws 13, or other suitable se curing means.

The lower end of the packer support is reduced forming an annular external shoulder 14 above its lower end, thus spacing said lower end from said sleeve 6'. The sleeve is internally threaded and has an annular, adjustable stop, 15 screwed therein around the reduced lower end .of said packer support, to limit the downward movement of the packer support relative to the sleeve 6'. Said sleeve also has an annular abutment 16 screwed therein and spaced beneath said stop. Screwed onto the lower end of the support 6 there is an annular external abutment 17 1 arranged to interengage with the abutment 16 upon upward movement of said support to limit the upward movement of said support relative to said sleeve. Thus upon downward movement of the support the shoulder 14 will contact with the stop 15 and limit the expansion of the packer and upon upward movement of said support the abutments 17, 16

will interengage and the weight of the load beneath will be assumed by the support 6 and the packer 11 will be relieved of said load.

Around the nipple 4 there is a casing engaging device comprising the ring 18 and the expansible casing engaging slips l9 depending therefrom and spaced apart. These slips have the external teeth 20 having a pitch corresponding to the pitch of the threads 7, and have theinside downwardly diverging faces 21 which ride against the expander 8, said slips being adapted to be forced outwardly by said expander as hereinafter described.

The lugs 5 work between said slips and prevent the relative rotation of said nipple 4 and slips 19. Attached to the lower end of the sleeve 6 there is a tubular expander 22 whose external surface has the faces 22' which converge, or taper downwardly, and around this expander are the expansible slips 23 whose outer sides have the'teeth 24 and whose inner sides have upwardly flared faces 25 which ride against the external faces 22 of the expander 22. The slips 23 are connected to the annular anchor 26, beneath, by the flexible arms 27. The upper end of the pipe 2 is threaded into the lower end of the tubular nipple 28 whose upper end, in turn, is threaded into the lower end of the outside sleeve 29 and between the annular inside shoulders 30, 31 of theadjacent ends of the anchor 26 and the sleeve 29 there is a coil spring 32 which supports said anchor 26. When the device is assembled to be lowered into the well, one or more, of the slips 23, may be an chored to the expander 22 by means of a frangible pin 33, and the external annular abutment 34, on the inside sleeve 35, is in abutting relation with the opposing inside annular shoulder 36 on the outside sleeve 29. The upper end of the sleeve is screwed into the expander 22 and said sleeve 35 fits closely within the anchor 26 and the spring 32 and its lower end fits within the nipple 28 and is spaced above the upper end of the inner pipe 2 when the device is assembled and let down into the well.

In use the apparatus may be assembled as shown in Figures 1 and 2 and let down into the well until the lower end of the pipe 2 is landed on the bottom of the bore. The weight of the load above will shear the pin 33, and the spring 32 will force the slips 23 upwardly and the expander 22 will move downwardly to expand said slips into engagement with the casing 1 and the pipe or screen 2 beneath will be relieved of the entire of the weight of the string 3 above and will not be liab e to be bent or distorted by such load. The annular abutment 34 will, at the same time, land on the upper end of the nipple 28 and a substantially fluid tight joint will be formed between them. The sleeve 6' is now held stationary and the sup ort 6 will move on downwardly expandin t e packer 11 out against the casing 1 and forming a fluid tight joint therewith. When the packer is expanded the shoulder 14 will en age the stop 15 and thereby sustain the weig t of the load above to prevent the further expansion acker, or injur thereto, or to the casing y reason of sai further expansion. The'amount of expansion of the packer desired should be determined before the device panded out against the casing.

If it be' desired to release the packer and remove the apparatus from the well, the string may be turned to the right thus part1 unscrewin the threads 7 and the lugs 5 engage and turn the slips 19 and the nipple 4 and the slips will move upwardl relative to the packer support 6, until the s s are released from the casing, permitting t e packer to collapse and the apparatus may be withdrawn or if it be desired to relocate the packer the apparatus maybe moved upwardy to the desired location and then lowered until the slips 23 engage the casing and anchor the apparatus and strin 6 may then be further lowered to expand tie packer and turned to the left to screw the threads 7 home and again expand the slips 19 into engagement with the casing to hold said packer expanded. The threads 7 are loosely interconnected so that the joints of the str' above will not unscrew when the threads are screwed home. j

In some cases the string 6 will be left in the well but in some cases it will be desirable to detach the string and remove it and leave the packer set. In case it be desired to remove the string it should be connected to the ni ple 4 b means of a conventional type 0 J-tool 3 as illustrated in Figure 5 and which will permit the detachment of the strin from said nipple.

The rawings and description disclose what is now considered to be a preferred form of the invention, b way of illustration, while the broad princip e of the invention will be tubing having means adjacent the ends of the packer effective to expand said packer when the sup ort and tubing are relatively moved longitudinally in one direction, interengagin abutments carried by the support and tubing, respectively, arranged to limit such movement to limit the expansion of the packer, one of said abutments being adjustable and an abutment on the support with which the tubing abutment may engage to suspend the tubing from said support.

In testimony whereof I have signed my name to this specification.

GRANVILLE A. HUMASON

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