Патент USA US2096739код для вставки
Oct. 26, 1937. A. H. FLETCHER 2,096,739 VVACUUM RELEASE COLLAR Filed Oct. 1, 1936 A \ _ // J}a wm L 1 /.A"W/_M%,5 vwily/.1 \i . § ,77Z7f 06/7wk 07w % / ?/. [M H1 @ F:g 239639 Patented Oct. 26, 1937 UNITE rut 0mm STA 'i1l'l 2,096,739 VACUUM RELEASE COLLAR Allen H. Fletcher, Bakers?eld, Calif, assigncr to Fletcher Oil Well Desander Corporation, Bakers?eld, Calif” a corporation of California Appiication October 1, 1936, SerialNo. 103,611 5 Claims. (01; rec-19) disclosed in Patent #I,Q58,915 although they may This invention relates to a vacuum release col lar to be mounted upon the upper end portion of a plunger of a vacuum sand bailer or the like, and it is ‘primarily an object of the invention to pro 5 vide means for the release automatically of ex cessive vacuum which would make the bailer un duly adhere to any hard or solid formation which be otherwise constructed. would otherwise result in sticking. It is also an object of the invention to provide a 10 device which operates automatically to obviate any sticking or suction adhesion of the bailer when the pull exerted on the sand line reaches a safe and predetermined maximum thus prevent ing breaking of the sand line and avoiding the 15 necessity of a ?shing job with the possible loss of the bailer. > The invention has for another object to provide 20 a release collar embodying means whereby the bailer can be released with a good margin of safety for varying sizes of lines and also for Varying conditions of same. The invention consists in the details of con struction and in the combination and arrange ment of the several parts of my improved vac 25 uum release collar whereby certain important ad vantages are attained and the device rendered. simpler, less expensive and otherwise more con venient and advantageous for use, as will be hereinafter more fully set forth. The novel features of my invention will herein 30 after be de?nitely claimed. In order that my invention may be the better understood, I will now proceed to describe the same with reference to the accompanying draw 35 ing, Wherein:— Figure 1 is an enlarged fragmentary view part ly in section and partly in elevation illustrating a vacuum release collar constructed in accord- V ance with an embodiment of my invention in ap 40 plied position upon a bailer plunger; Figure 2 is a longitudinal sectional view taken through the collar and the parts directly asso ciated therewith. 7 As disclosed in the accompanying drawing, P 45 denotes a tubular plunger or piston of a general ' r I ' My improved vacuum release collar comprises an elongated tubularmember l which in prac tice is preferably about two .feet in‘ length; Threading into‘the lower end portion of this . tubular member I is a hollow nut '2.,the lower marginal portion of which-being provided with the opposed notches v3 whereby a suitable wrench may be engaged with the nut 2 for applying or 10, removing the same or for adjusting the nut into or out of the member I as may be desired. The inner or inserted end of the nut? pro vides an annular seat 3' for a coil spring 4. This spring t is preferably made of ?at steel material 1-5 and about five inches in length. This spring 4 surrounds a hollow mandrel or stem 5 of a di ameter less than the internal diameter of the tubular member l and the upper portion of this mandrel 5 is formed with a head 6. The head 6 20 at its inner end is outwardly enlarged with re spect to the mandrel or stem 5 whereby is provid ed an annular shoulder ‘l with which the spring 4 also engages. The head 6 immediately adjacent to the shoulder 1, as at 8, is straight to provide an annular guiding surface for the mandrel or stem 5 for coaction with theinner face of the member | to assure the maintenance of the man drel or stem 5 in desired position. Above or out wardly of the straight surface 8, the head 6 is in 30 the form of a truncated cone as illustrated at 9 with the central or apex portion open.’ This opening 5 ii is of a diameter less than the diameter of the major portion of the bore ll of the'man drel or stem 5 with the portion of the bore of the mandrelor-stem 5 within’ the head 6 tapering, as at l2, toward this-opening l0. ' The wall de?ning the opening H] is formed to . provide a seat M with which has close contact a ball valve l5. ' ~ I 40 The upper portion of the applied member I in the present embodiment'of the invention has its bore slightly reduced to provide an internal annu lar shoulder 25 which is contacted by the mar ginal portion of a disc l1. This disc l‘! is prefer type employed in connection with de-sanding or ably pressed into- the member I and against the general construction and operation of the plung the peripheral wall of the conical portion 9 is normally maintained in engagement with the seat disc I‘! under the action of the spring 4. It is to be particularly noted that the opening I8 is shoulder l6. This applied disc I‘! serves as a bailing devices for oil wells of a vacuum type. ' seat for the mandrel or stem 5 and is provided This plunger or piston works within a barrel B in its central portion with an opening I8 into which, of course, is of desired length. As the which the apex portion of the head 6 extends and er or piston P and barrel B are well known a de tailed description and illustration thereof is be lieved to be unnecessary. It may be added that 55 these parts are substantially the same as what is of a diameter in excess of the diameter of the 55 2 2,096,739 ball valve l5 so that the ball valve can raise and of a vacuum bailer, said collar comprising a tubu lower without hindrance or obstruction with the lar member, a normally closed valve therein, said suction action of the bailer. valve moving to open position to release the vac- ' The upper portion of the member I has thread uum created by the piston upon undue resistance ed therein or otherwise coupled thereto a rope being offered to the suction stroke of the piston,‘ socket or bail l9. said valve. being tubular and open at both ends, Should the bailer adhere unduly hard to any ' and means for normally closing the bore of the formation or thing in the well, the operating rope valve. or wire for the bailer often parts resulting in a 3. As a new article of manufacture, a vacuum ?shing job and often resulting in the total loss of release collar for attachment to a tubular piston the bailer. However, with the "improved vacuum of a vacuum bailer, said collar comprising a tubu release. collar the pull of the sand line will over lar member, a normally closed valve therein, said come the tension of the spring 4 and force the valve moving to open position to release the vacu ball l5 downward together with the mandrel or um created by the piston upon undue resistance being offered to the suction stroke of the piston, 15 15 stem 5. This movement places the spring 4 under increased tension. The slightest downward move means, for maintaining the valve in its normally ment of the mandrel or stem 5 creates an open closed position, said valve being tubular and open ing between the portion 9 of the head 6 and the at both ends, a’ disk ?ttedwithin and intersecting disc I‘! immediately releasing the vacuum created 20 by the suction action of the bailer. This release of the vacuum results in an immediate letting 7 go of the hold the bailer may have on the forma tion or anything in the well. The. tension of the spring 4 may be adjusted 25 upon proper turning of the nut‘ 2 so that the bailer can be set to release with a good margin of safety for varying sizes of lines and also for vary ing conditions of same. From the foregoing description it is thought 30 to be obvious that a vacuum release collar con structed in accordance with my invention is par ticularly well adapted for use by reason of the convenience and facility with which it may be assembled and operated, and it will also be ob 35 vious that my invention is susceptible of some change and modi?cation without departing from the principles and spirit thereof and for this rea son I do not wish to be understood as limiting my self to the precise arrangement and formation of 40 the several parts herein shown in carrying out my invention in practice except as hereinafter claimed. I claim:— 1. As a new article of manufacture, a vacuum 45 release collar for attachment to a tubular piston of a vacuum bailer, said collar comprising a tubu lar member, and a normally closed valve therein, said valve moving to open position to release the vacuum created by the piston upon undue resist 50 ance being offered to the suction stroke of the piston, said valve being tubular, and a valve mem~ ber coacting with the upper end of the tubular valve normally closing the tubular valve against ?ow therethrough. 2. As a new article of manufacture, a vacuum releasecollar for attachment to a tubular piston the bore of the tubular member, said disk having a central opening for registerrwith the bore of the valve, said disk providing a valve seat for the valve, a ball valve extending through the opening, of the disk andnormally seating upon the adja cent end of the ?rst valve to close the bore of said 25 ?rst valve. 4. As a new article of manufacture, a vacuum release collar for attachment to a tubular piston of a vacuum bailer, said collar comprising a tubu lar member, a normally closed valve therein, said valve moving to open position to release the‘ vac 30 uum created by the piston upon undue resistance being offered to the suction stroke of the piston, means for maintaining the valve in its normally closed position, said valve being tubular and open at both ends, a disk ?tted within and intersect 35 I ing the bore of the tubular member, said disk hav ing a central opening for register with the bore of the valve, said disk providing a valve seat for the valve, a ball valve extending through the opening of the disk and normally seating upon 110 the adjacent end of the first valve to close the bore of said ?rst valve, the opening in the disk being of a diameter to allow the ball valve to pass therethrough upon separating movement be tween the ?rst valve and the disk. ’ 5. As a new article of manufacture, a vacuum 45 release collar for attachment to a tubular piston of a vacuum bailer, said collar having an internal valve seat, a tubular valve, yieldable means for normally holding the valve to the internal seat, 50 said valve moving to open position to release the vacuum created by the piston upon undue resist- ' ance being o?ered to the suction stroke of the piston, and means for‘ normally closing thetubu lar valve against ?ow therethrough. ALLEN H. FLETCHER.