US1609270A - Packer - Google Patents

Description

Nov. 30 1926.

v H. THOMSON PACKER Filed August 5, 1924 2 Sheets-Sheet 1 Nov. 30, 192

H. THOMSON 2 Sheets-Sheet 2 Patented Nov. 30, 1926.

units stares PATENT" orsics.

HARRY THOMSON, OI HOUS'lION, TEXAS. ASSIGNOB TO HOWARD SMITH (30., O1

' HOUSTON, TEXAS, A- CORPORATION.

PAOKEB.

Application filed August 5, 1924. Serial No. 780,146.

This invention relates to new and useful im rovements in a packer.

no object of the invention isto provide a well packer adapted to form a water tlght a seal or joint between two pipes a well bore.

Another object of the inventlon is to pro,- vide a well packer which may be set to form a water tight joint between an inner pipe and an outer plpe or the surrounding walls of the well bore, and which includes means for holding the packing in set, or expanded position.

A. further object is to provide a special type of tool for setting the packer, said tool being releasable so that it may be withdrawn when the packer is set.

With the above and other objects in view, the invention has particular relation to certain novel features of construction, operation and arrangement of parts, an example ofwhich is given in this specificatlon and illustrated in the accompanying drawings, wherein 4 Figure 1 shows a sideielevation of the g5 packer as lowered in the. well casing and 1n position to be set or. expanded, shown partly in section. t

Figure 2 shows an enlarged fragmentary vertical sectional view, showing the setting 80 tool in active position and the packer set or expanded.

Figure 3 shows an enlarged fiagmentary vertical sectional view of the packer in position to be set.

95 Figure 4 shows an enlarged fragmentary vertical sectional view, showing the setting tool in inactive position; and,

Figure 5 shows a cross sectional view on the line 5-5 of Figure 3.

49 Referring now more particularly to the drawings, wherein like numerals of refer: ence desi nate similarparts in each of the figures, t e numeral 1 designatesfthe well casing, or otherpipe in the well bore. The" numeral 2 designates the liner. to which the well screen which is to be set in the bore, is attached. In the present illustration of Figure 2 the packer is shown expanded and forming a water tight 'joint between m liner and the outer casing -1. Connected to the upper end of the liner 2 there is a tubular nipple 3 whose lower end is reduced, or swaged, as shown and the upper end of 'said lower end w en the bailer is this nipple is threaded into a collar 4, which, in turn, is threaded onto. an annular outwardly threaded rib 5 of the ring like dog 6. The lower end of this dog 6 is vertically slotted forming flexible fingers 7, whose inner faces have ratchet teeth having a left hand pitch. The dog 6 is slidably mounted on a packing sl eve 9, and held against detachment there om by means of the annular collar 10,.screwed onto the lower end of the sleeve. The lower end of the sleeve 9 is outwardly beveled as at 9', so that a bailer, used in bailing the well will not engage a ainst 1n elevated. There is an expansible packing element 11 around the sleeve 9. This acking element is formed of any suitable packing material such, for example, as burlap-or other fabric arranged in lengthwise overlapping strips on the sleeve-9. The lower. end of the packing element'surrounds the upper end of the dog 6, and is clamped thereto by means of thesurrounding band 12, and the packing element is clamped to the sleeve 9 by means of surrounding bands i as 13, arranged at intervals, the upper one of which is at the upper end of said element. 7

A'section of the sleeve within the packing element 11 has the peripheral annular ratchet teeth 14, having a left hand pitch, f

and adapted'to interlock with the teeth 8, of the locking dog 6, when the packing is. ex-. panded or set to hold said packing -in expanded position.

The setting tool embodies a comparatively small tubing 15,. whose upper end is threaded into the bushing 16, which in turn is threaded into a collar 1.6, and this collar is threaded by means of left hand threads into the collar 17, carried by the sleeve 9.

The upper end of this collar is outwardly flared, or beveled, as at 17, to prevent the bailer, when used, from hanging thereon-- When assembled in position to be lowered into the'well, an operating stringof pipe 22 is connected to the collar 16'.. The lower end of the tubing 15 has an annular sleeve. like anchor '18 fastened thereto whose upper end has an "annular depending rib 18?. There, are radially operating supporting arms 19 notched to receive said rib 18" andthe lower ends of these arms are normally held 25 v string is then lowered and the weight thereexpanded by thecoil springs 20, which are interposed between them and the anchor 18 said springs being of suflieient rigidity to hold the supporting arms in proper position. When in assembled position vthese arms are located in the lower end of the nipple 3, with their lower ends restin against the inside annular shoulder 21, an the nipple 3,.v

' to hold the device rigid and prevent the packv er from collapsing until it is ready to be set. The entire device is let down into the well by means of the string of pipe 22, con-f nected to the upper end of the collar 16",

- the parts being held against relative turn- 1ng y the brass pin 25. When the lower end of the well screen attached to the liner 2 of will shear the pin 25, and gradually force the lower end of said sleeve down through the dog 6, and the nipple 3. The upper sections of the packer, between the i bands 13 will move downwardly with the sleeve 9, but the lower section or end of said packing element will abut against the rib'5, and be expanded, and as the sleeve i further lowered the sectionsof the packer, between the surrounding bands will be expanded in succession from the bottom upwards. Consequently, there will be no a-ppreciable friction of the packing element against the outer pipe as the packing ele-- ment moves downwardly, but each section will move downwardly to position for setting, before it is expanded against the outer pipe, the lengthwise packing strips bulging/ out between the bands or wire wrappings 12 and 13. v

When the packing is set, the sleeve 9 will 7 have moved downwardly a sufficient distance to permit the ratchet teeth 8 and 14 to engage and the dog 6 will thus be held in position to lock and hold the ment in expanded position. I

The setting tool may then be withdrawn from the bore through the string 22. y 7 Threaded into the lower end of the tubing packing ele- 15 there is a reducer nipple 23 which is in ternally threaded to receive the upper end of the usual wash pipe 24, if it is desired to use thersame.

In some cases it may be desired to release the packer. In such case a string of pipe is let downinto the bore and connected in:

any approved manner to the collar 17, and

then turned to the right to unscrew the packing sleeve 9 from the dog 6, so as to disengage their teeth and an u will then release, or collapse, element 11 and ermit its What I claim 1s:- a Y J 1. A packing device including a tubular nipple whose lower end is reducedforming an inside shoulder and adapted to be connected to a liner beneath, a collar. connected to the upper end of the nipple, an annular do connected to said' collar whose lower en is vertically slotted forming fingers whose inner faces have ratchet teeth, a packing sleeve 0 which said dog is slidably mounted, means holding the 'dog against detachment from said sleeve, an expansible t e packin withdrawal, g

packing element around the sleeve the lower.

end of which is attach ed to said dog, a secgage. with the teeth of said fingers, all in combination with a setting tool capable of movement into upper or lower position relative to the packing device and embodying a tubing Within-said sleeve and whose upper end is connectedtto the sleeve and an annular sleeve like anchor fastened In the tubing,

pwardpull tion of the sleeve within the packing being provided with ratchet teeth adapted to enradially operating supporting arms whose upper ends are connected. to said anchor,

.yieldable means holding the free ends of said arms expanded into position to rest on when the setting tool is in its lower position said yieldable means operating to carry the lower ends of said arms above the upper end of said sleeve when the setting tool is in its upper position,

2. A packing device including a tubular as the inside annular shoulder of said nipple r end is vertically slotted forming fin ers whose inner faces have ratchet teeth aving a left hand pitch, a packing sleeve on' which said dog is slidably mounted, means holding the dog, against detachment from said sleeve, an expansible packing-element around the sleeve, the-lowerv end of which is attached to 'said dog, a section of the sleeve within the packing being provided with ratchet teeth having a left hand pitch adapted toengage with the teeth .of said fingers, all in combination with a setting tool capable of movement into upper or lower position relative to the packing de-' vice and, embodying a tubing within said sleeve and whose upper end is connected to the sleeve and anannular sleeve-like anchor fastened to the tubing, radially operating supporting arms whose upper ends are connected to said anchor, yieldable means normall holding the free ends of said arms expan ed into position to rest on the inside annular shoulder of said nip le when the setting tool is in' its lower position, said yieldable means operating to carry the lower ends of said arms above the upper end of said sleeve when the setting tool is in its upper position.

3. A packing device including a tubular nipple whose lower end is reduced forming an inside shoulder and adapted to be connected to a liner beneath, a collar connected to the upper end of the nipple, an annular dog connected to said collar whose lower end is vertically slotted forming fingers Whose inner faces have ratchet" teeth, a packing sleeve 'on which said dog is slidably mounted, means holding the dog against detachment from said sleeve, an expansible packing element around the sleeve, the lower end of which is attached to said dog, said packing element being formed of packing material arranged in overlapping strips and bands spaced apart around said element, the

upper band being at the upper end of said element, a section of the sleeve within the packing being provided with ratchet teeth adapted to engage with the teeth of said fingers, all in combination with a setting tool capable of movement into upper and lower position relative to the packing device and embodying a tubing within said sleeve and whose upper end is connected to the sleeve and an annular sleeve-like anchor fastened to the tubing, radiall operating supporting arms WhOSQQp er en anchor, yielda'j le means normally holding the free ends of said arms expanded into ositio'n to rest on the inside annular shouler of said nipple when the settin tool is in its lower position, said yieldab e means operating to carry thelower ends of said arm above the upper-end of said sleeve when the setting tool 1s inits upper position.

4. A packer adapted to, be connected to anoperating string of pipe and including two telescoping members, one of said members being connected tosaid pipe by left hand threads, an expansible packing element surrounding said last named member,

.an abutment carried by the other member against which the adjacent end of the acking element is adapted to abut, the ower end of the last named member being re,

are connected tosaid duced, a tube connected to said string of HARRY THOMSON.

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