US2155381A - Bottom connection hydraulic setting tool - Google Patents

Description

' April 25, 1939. R. N. BEAN ET AL 2,155,381.

BOTTOM CONNECTION HYDRAULIC SETTING TOOL Filed Sept. 25, 1957 ZSheets-Shet 1 2| I P59 v 2% 4fl l8 4/ y A A "51 40/ 42. 4 as g\ 2 RNBEAN, H.C.Bl .ocK a: L.A.LAYNE INVENTORS ATTORNEY5 Patented Apr-'25, 1939 UNITED. STATES PATENT OFFICE nor'rom CONNECTION 'mmnaumc SETTING 'roor.

Buric N. Bean, Harold C..Block, and Leslie A. Layne, Houston, Tex; said Bean and said Block assignors to said Layne j Application September 25,1937, Serial Names 9 Claims.

The invention relates to a combination well bottom assembly and setting string and setting tool therefor wherein the setting tool will be released by the application of hydraulic pressure Another object oi the invention is to provide a combination setting tool and wash valve which can be released and the wash valve closedby bydraulic pressure.

Another object of the invention isto provide a setting tool connection at the lower end of the well bottom which may be, released by the application of hydraulic pressure.

Still another object is to provide a combination release plug for setting tools and a wash valve which can be moved to close the bottom of the well and to be latched in such closed position.

Other and further objects of the invention will be readily apparent when the following descrip tion is considered in connection with the. accompanying drawings, wherein:

Fig. 1 is aside elevation of the upper end of the well bottom assembly showing certain of the parts in section and arranged as they are when the assembly is lowered into the well bore.

Fig. 2 is a side elevation showing a continuation of Fig. 1 to illustrate certain of the parts in section at the bottom of the assembly and showin the parts in position to receivethe hydraulic pressure for releasing the tool and closing the wash valve.

Figs. 3 and 4 are side elevations of the upper and lower portions of the assembly respectively, but showing the parts alter the setting has been accomplished andthe packer collapsed.

The present invention relates to the general assembly shown in the co-pending application for patent oi! Leslie A. Layne, Harold'C. Block and Albert L. Roco, Serial No. 122,948, filed January 29, 1937, and also to the general construction of a Setting tool such as shown in Patent No.

at 2 and terminates in the-lower end '8 below 55 which the well bottom assembly 4 is arranged to project; This assembly includes the set shoe 9 which carries a back pressure valve 1 of the downwardly opening type which fits against a ring I mounted in the set shoe. This ring has an'inner cylindrical face 9 which serves as a seat for the wash valve III which is slidably mounted inside of the nipple II which is connected to the set shoe and projects upwardly therefrom. A piece of blank pipe il may be connected to the well bottom above the set shoe by means of a coupling i or the strainer pipe It may be connected directly to the well bottom. e strainer It may be of any desired length and has the blank liner ll comfected thereabove. The upper end of the liner ll is provided with a stop or shoulder It which forms part of the packer l9. Inside of the well bottom assembly [is the tubing or. setting string which may be a pipe of any desired diameter which carries ag setting tool 2| and extends downwardly inside of the well bottom to 1 pander block and wash valve I0 is positioned in side 01' the fingers, the cylindrical surface 22 thereof having been moved inside or the ends of the spring fingers to hold them in expanded position. This wash valve has an upstanding skirt 30 thereon which fits closely-about the lower end l of this sleeve 22 so as to form a seal therewith.

In order that this wash valve will be held in position to maintain the fingers expanded, one or more lacking pins 38 may be passed through the nipple l i and into the wash valve as seen in Fig. 2. 40 These locking pins will be inserted after the parts are assembled. The wash valve has a cylindrical passage 34 therein which leads to the discharge ports 35 so that washing liquid may be pumped downwardly through the setting string or wash pipe 26 and discharged through the shoe 5 when H the pressure thereof is suiliclent to open the back pressure valve 1.

It seems obvious that the weight of the well bottom-assembly will be carried by the threaded 5 connectionZS-fl so that the entire weight of the assembly will be supported by the wash pipe'or setting string 29. There will not be any load on the strainer 88, however, because this connection with the assembly is at the base thereof.

with the parts in the positions shown in Figs. 1 and 2 the entire apparatus will be lowered into the well bore until the set shoe rests on the bottom of the well.

The assembly can then be raised slightly and the washing operation carried on until the returns have cleared up to show that a majority of the drilling mud has been removed from the so that hydraulic pressure applied through the setting string 21 will be available .to shear the pin or pins 33 and cause the combination wash valve and e p nder block to move downwardly to the position shown in l ig. 4.

This downward movement accomplishes two functions. namely, it closes the wash valve by moving the skirt I thereoi' into the cylindrical facesoitheringisosstoiormaseal-and positively close the lower end or the well'bott'om.

' The outer surface ll of this skirt may be slightly taperedsothataiitwillbeprovidedat this point to'assistin holdingthewashvalvein closed position and assist in stopping the valve. Thesharpcorneroithlsskirtllasitmovesinto =thecylindflcaliacelwillservetoshearofiany obstruction that may have been deposited on the seatringl-insomeinstancessmallsticksor' twigs. gravel or nails may fiow downwardly with the wash water and be deposited at this location due to the p esence or the back pressure valve I.

This shearing action will tend to remove such obstructions and insure a'sfeal. I! desired a plurality of slip Jaws ll. may be carried in the periphery of the wash valve and any upward movement or the wash valve after it is once set will be prohibited by the wedging action oi these slips as seen in Fig. 2.

The other runction oi the movement of this combination expander block and wash valve is to alsobeseeninl'ig.4becausetheblock:has moved downwardly from its position within the lower end oi the fingers II and due to the resilient nature of these fingers they will spring inwardly to release their threaded connection with the well bottom assembly, and they will assume the position shown in Fig.1 as abutting against the sleeve 22.

The skirt II during this action moves downwardly a shortdistance along the sleeve 22 but not a'suiiicient distance to move away from the sleeve. It the operator now desires to find out whether his setting'tool has released itis only necessary for him to raise the setting string 20 a short distance so that the lower end of the sleeve 22 moves out of the skirt II. The operator can observe hispressure gauge at this time andbyraisingthesettingstringslightlythere shouldbeadropinpressure-becausethepressure has been built up when the plug ll. closed ed the ports 36 and when the sleeve 22 moves out or the skirt ll thewashins liquid inside or the setting string will be released into the annular space 5| inside oi thestrainer. This si nal advisestheoperatorthathistoolhasbeenreleased. On the other hand it no such signal is observed when he raises the wash pipe he is assured that the wash valve has not moved downwardly a sumcient amount to cause the release aromas:

and he may then increase his pump pressure until he does obtain a release.

If. the operator wishes to be doubly sure that his wash valve is completely closed he may now lower the setting string until the lower ends of the fingers 25 abut against the upper end of the skirt and in this manner he may tamp the wash valve to be sure that it is in its lowermost position.

Another manner of releasing the tool would be to raise the entire assembly a very short distance from the well bottom at the time the plug is inserted. Thus when the pins 33 shear and the wash valve moves downwardly the setting tool connection would be released and the well bottom assembly 4 would drop a short distance onto the bottom of the well bore and this downward movement would carry the skirt as to a point below the end of the sleeve 22.

A circulation of liquid may now be had to wash the inside oi' the screen and then the setting string 20 may be raised a sufilcient amount to bring the setting tool 2i adjacent the elevation. of the upperend of the packer so that it will engage the shoulder 54. The weight of the setting string may then be utilized to collapse the packer by moving the setting tool barrel 56 downwardly over the ratchet teeth 51 so that the upper shoulder 58 on the packer barrel is moved toward the stop or support it so that the packing material I! will be expanded as seen in Fig. 3.

This particular'type oi packer is known as an upside down packer because the lower support It remains stationary while the packer barrel 58 which carries the packing 58 moves downwardly. Such a packer is of advantage because the expansion of the packing begins at the base and progresses upwardly. Such an arrangement permits the setting of the packer with a setting string of much lesser weight than other types of packers.

I! desired a concrete shield 60 may be carried by the upper end of the packerto cling about the' setting string 20 and prevent the entrance of sand or sediment into the well bottom assembly.

The set shoe 6 of course has the usual opening 62 therein but in addition may have the laterally and upwardly inclined ports 63. These ports are provided to allow discharge of the wash liquid in a direction so that the bottom of the well bore will not be washed away. It has been found that in some instances the wash water discharging from the opening 62 would wash out a considerable hole so that when the washing operation was completed and the well bottom set the whole assembly would move down to rest on the bottom' and the result would be the setting of the strainer at an elevation considerably below its calculated position. The lateral discharge. of the wash water has therefore been provided.

Broadly, the invention contemplates acombination wash valve and setting tool expander which may be raised to close the well bottom, release the setting tool, and signal the operator that such release has been eiiected.

What is claimed is:

l. The combination of a well bottom assembly and asetting string and setting tool therefor comprising a plurality of spring fingers on said string, a wash valve and expander block beneath said fingers, a set shoe, shear means'hoiding said valve in place so that said fingers are connected to said set shoe, hydraulically operable means to shear said means and move said valve to release said connection and to' move said valve to closed position.

.2. A well bottom assembly, an hydraulic re-' lease setting tool connected thereto, a wash valve to hold said tool connected, and hydraulically operable means to move said valve to closed positioniand to release said connection.

3. A well bottom assembly, a setting tool connected' thereto, a wash valve to hold said tool connected, hydraulically operable means to move said valve to release said tool, and means to latch said wash valve in closed position.

4. A combination expander block and wash valve for well bottom assemblies and setting tools therefor comprising a body, ports therethrough,

and means to engage the setting tool to hold said tool connected to the well bottom.

5. A wash valve 101' well bottoms including a tapered skirt, discharge ports through said valve,-

and an hydraulic setting tool including a wash I valve, hydraulic means to move said valve to closed position and to release said tool, and means 1 on said tool to set the packer of said well bottom assembly.

7. In combination a well bottom, a waslastring, and a cementitious cap carried by said string to deflect settlings from said well bottom.

8. A wash pipe and wash valve, aplug to be pumped through said pipe to said valve, ports in said valve to be closed by said plug, and inter! engaging parts on said valve and pipe which are releasable to relieve the pressure in said pipe as an indication the pipe is released.

9. A set shoe for well bottoms comprising a body, a back pressure valve therein, a discharge opening in the base of said body, and laterally and upwardly inclined ports in said body below said. valve.

RURIC N. BEAN.

HAROLD C..BLOCK. LESLIE A. LAYNE.

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