US2076761A

US2076761A - Packer and setting tool

Info

Publication number: US2076761A
Application number: US55754A
Authority: US
Inventors: Ernest L Barker
Original assignee: Individual
Current assignee: Individual
Priority date: 1935-12-23
Filing date: 1935-12-23
Publication date: 1937-04-13
Anticipated expiration: 1954-04-13

Description

April 13, 1937. I B RKER 2,076,761

PACKER AND SETTING TOOL Filed Dec. 25, 1935 2 Sheets-Sheet 1 A ril 13, 1937. E. BARKER PACKER AND SETTING TOOL Filed Dec. 23, 1935 2 Sheets-Sheet 2 Patented Apr. '13, 1937 UNITED STATES PATENT OFFICE rscxnn. AND SETTING TOOL Ernest L. Barker, Houston, Tex. Application December 22, 1935, Serial No. 55,154 1 Claims. (01. 1 6-10) This invention relates to a packer and setting tool.

An object of the infention is to provide in a packer and setting tool, novel means for anchoring the setting string to the packer support, the anchoring means being of such construction that the same may be readily released and withdrawn to the ground surface preparatory to setting the packer.

In the process of setting a packer between the upper end, of the liner, to which'the screen is attached,-and the outer casing the screen and packer and setting tool are attached to the lower end of thesetting string and the screen is thus 15 let down into the well. It is desirable, if not necessary, that "the setting'strin'g be interlocked with the packer support during this letting-in process, so thatthe' packer will not be prematurely expanded. After the screen has been set in the well, it is then necessary to release the locking-means to permit the setting tool to operate and expand the packer, and it is desirable that the operator may know definitely that the interlocking means have been'released before it 25 is attempted to set the packer, as otherwise it cannot be definitely ascertained whether the" packer has been set or not, or whether the setting string has been released from the packer support when it is desired to withdraw the string. It is 30 the prime object of this invention to provide interlocking means between the setting string and packer support that may be releasedand with drawn to the derrick fioor, so that the operator will have definite knowledge that the setting 36 string has been released from the packer support whereupon the packer may be set and the setting string withdrawn without danger of withdrawing the packer with it.

Another object oi the invention is to provide 40 in apparatus oi this character, a novel type of wash pipe construction. I

With the above and other objects in view, the invention has particular relation to certain novel features of construction, operation, and arrange- 45 ment of parts, an example of which is given in this specification and illustrated in the accompanying drawings, wherein:--

Figure'l shows a fragmentary side elevation,

- partly in section of the upper end of the appa- 50 ratus, showing the packer collapsed.

. Figure 2 shows a vertical sectional :view of an intermediate portion of the apparatus, showing .the means for locking the setting string to the 55 packer support.

Figure 3 shows a fragmentary side view, partly in section, of the lower end of the apparatus.

. Figure 4 shows a side elevation, partly'in section, of the complete apparatus, showing the setting string locked with the packer support to maintain the packer collapsed.

Figure 5 shows a side view,-partly in section, of the complete apparatus, showing the packer expanded.

Figure 6 shows a cross-sectional view taken on the line 6-6 of Figure 5, and, T

Fig. 7 shows a cross-sectional yiew taken on the line 1-1 of Figure 4.

Referring now more particularly to the drawings wherein like numerals of reference designate the same parts in each of the figures. The numeral I designates a well casing set in a well. The

numeral 2 designates a screen which is to be set in the well bore opposite the oil bearing strata.

Attached to the lower end of the screen there is the set shoe 3, of conventional construction,

having the back pressure valve 4- of any preferred form. I

Within the screen 2 there is the tubular wash pipe seat 5 which is supported by the shoe 3 and attached to the upper end of which is the tubular ,nipple 6, whose upper end carries the tubular wash pipe guide I i Secured to the upper end of the screen 2 there is an elongated special coupling 8 having the inside annular groove 9, and also having the inside ring-like packing III, II) above and beneath said groove.

A tubular packer-body u is attached, at its lower end, to the upper end of the coupling 8. Around this packer body there is an expansible packer l2, whose lower end is seated on an external annular seat l3 on the body, and whose upper end abuts the ring I which is secured. around the tubular slip support l5; Y 1 The upper end of the packer body has the external downwardly pitched ratchet teeth l6 and depending from the slip support are the expansible slips I! which fit within the packer l2, and around the upper end of the body II, and whose inner sides have the ratchet teeth I 8 arranged to engage the teeth It. Surrounding the upper oppositely arranged

side slots

22, 22, and attached to the lower end of the coupling 2 i is the reducing nipple 23. Depending from this'nipple there is a wash .pipe 24, whose lower end telescopes into the upstanding nipple 6.

Within the coupling 2| there is a head 25, whose lower end is bifurcated, forming the

fingers

26, 26. Between these fingers are the dogs 21; 21, whose lower ends are outwardly turned in onposite directions. These dogs are pivoted on the cross-pin 28 and their inner ends are upwardly turned and provided with notches 29 which coincide when the dogs are in active position.

. There is a locking rod" 90, axially movable through the head 25 and whose lower end is formed with a latch 3| adapted to engage in the notches 29 to lock said dogs in said active position. A coil spring 32 is housed within the head and presses against an external shoulder 33 on the rod 30, to maintain the latch in said locking position.

When the apparatus is essembled preparatory 25 to lowering ,the screen and packer into the well the dogs 21 :are projected through the slots 22 and into the, groove 9, and are locked in such position by the latch 3|, whereby the packer support and packer .will be suspended from the settingstring while being lowered into the well, and whereby the setting string will be prevented from moving downwardly relative to the packer support and prematurelysetting the packer.

The packing l0, l0, above and beneath the dogs. protect the dogs from sand, grit and the like from the surrounding mud laden fluid in the well, so that sand and like cannot pack around said dogs or collect within the head 25 to prevent the ready release oi. the dogs.

The groove 9 has the oppositely arranged

abutments

34, 34, and in case it may be desired to rotate the packer support and packer while going into the well, the setting string may be rotated and the dogs will engage said abutments to rotate the packer support and packer.

When the screen is landed on bottom, and it is desired to release the setting tool, an overvshot, or grapple of conventional construction,

maybe lowered down through the string 20 and engaged over the conical shaped head 35 of the rod 30 and upon an upward pull the latch II will first be released and thereafter the head 25 will be elevated causing a withdrawal of the dogs 21 from the groove 9, and the locking device may then be withdrawn from the well to the derrick floor, and the operator will the setting string has been released from the packer support.

The string 20 may then be lowered and the enlarged setting nipple 35 thereon will first engage the upper end of the slip support l5, and will move 'said' support-and the slip downwardly and the nipple will then engage the ring ll i'orcing the same downwardly and expanding the packer l2. As the packer isexpanded the slips I! will move downwardly between the packer l2 and the packer body H and the wedge ring will move downwardly in advance oi the slips, thus gradually forcing the packer outwardly to insure the free downward movement of the slips and to prevent the slips'from injuring the packer. The packer l2 will thus be expanded closely against the casing I to form a fluid-tight joint therewith as shown in Figure 5.

When the packer is expanded, the slips I! will be lowered into a well, a packer on know definitely thatmovement of the string,

engage the teeth lfl oi the packer body H and maintain the packer in expanded position.

Before the packer is set it is'desirable to wash plained, and the setting string, setting tool, and

be withdrawn from the' wash pipe may then well.

What I claim is:

1. In combination, a packer support, an expansible packer thereon, a setting string. a releasable device for locking the string to the support, said locking device, upon its release, being withdrawable, through the string.

2. In combination, a packer support adapted to a tubular setting string having means thereon to expand the packer upon lowering of the string relative to the support, a device for locking the string to the support, said; locking device being 7 releasable and withdrawable through the string to permit downward movement of the string to effect expansion 01' the packer.

3. In combination, a. tubular packer support adapted to be located in a well' and having valve means at its lower end, a tubular upstanding wash pipe seat in the support above the valve means, a packer on the support, releasable means for connecting the string to the support, a wash pipe attached to the string and whose lower end has a telescoping relation with the wash pipe seat, said string and wash pipe being, movable downwardly, upon release of said connecting means, an expansible packer on the support, means on the string efi'ective to expand the packer upon such downward movement, said releasable connecting means, upon release thereof, being withdrawablethrough thestring. 4. A packer and setting tool comprising a tubular support adapted to be set in a well, an expansible packer around the support, a tubular setting string, a releasable locking device within the string and in engagement with the support whereby the string may be locked against downward movement relative to the support, means on the string engageable with the packerand efi'ecthe support,

a tubular setting string,

tive to expand the packer upon such downward movement of the string, withdrawable as a unit through the string.

said locking device being 5. A packer and setting tool comprising a tub- I ular support adapted to be set'id a well, an expansible packer around the support, a tubular setting string, a releasable locking device within the string and in engagement with the support whereby the string may be locked against downward movement relative to thesupport, means on the string engageable with the packer and effective to expand the packer upon such downward movement 01' the string, said locking device being withdrawable as a unit through the string, and means for maintaining-the packer expanded.

6. A packer and setting tool comprising a tubular support adapted to beset in a well, an ex pansible packer around the support, a tubular setting string, a releasable locking device within the string and in engagement with the support whereby the string may be locked against downward movement relative to the support, means on the string engageable with the packer and eii'ective to expand the packer upon such downward said locking device being withdrawable as a unit through the string, said string and packer expanding means being withdrawable from the well upon release of said locking device, and means for maintaining the packer expanded.

7. In an apparatus of the character described, an outer and an inner pipe, spaced packings between the pipes, the outer pipe having an inside recess between said packings, a radially movable dog in the inner pipe engageable in the recess to lock the ,pipes against relative longitudinal, or