Патент USA US2117538код для вставки
May 17, 1938‘ R. c. BAKER 2,117,538‘ CEMENT BASKET Filed July 19" 1937 "0wil " INVENTOR, v .Esusaw CZ BAKEQ BY ATTORNEY I 2,117,538‘ Patented ‘May 17, 1938 ' unis STATES PA" OFFICE. 2,117,538 v . * CEMENT BASKET Reuben 0.‘ Baker, Coallnga, Calil'., assignor to Baker Oil Tools, Inc., Huntington Park, Calih, a corporation of California Application July 19. 1937, Serial No. 154,455 1 Claim. (cl. 166-10) This invention relates to appliances used dur ing the operations of sinking an oil well bore and particularly pertains to devices of the character - disclosed in my prior United States Letters Pat 5 cut No. 1,561,768. - Arranged about theexterior of this member H at equally spaced distances apart are ribs 32 formed of flat ?exible spring steel or other suit able" material. The lower ends of these ribs it are secured by welding or otherwise to the mem- 5 In this prior patent I have shown a collapsible basket structure circumscribing a well casing at a point along its length below cementing points J in the casing so as to create a barrier between the m casing and the wall of the well bore to enable trap ping of cavings and prevent downward movement of cement discharged from the cementing ports. In this manner the blank casing of a combination string may be cemented in without the cement 15 reaching the perforated pipe or the producing zone. It has various other uses, such as enabling cementing oil of intermediate water sands. In this prior patent the basket was constructed _ of an inverted frusto-conical canvas bag secured 0 to a plurality of longitudinally extending ?ex lble arms secured at their lower ends to the cas ing and ?aring outwardly so as to engage the wall her II. From their lower ends the ribs extend upwardly of the member at an angle thereto so as to form an inverted frusto-conical framework about the-member H. ' ‘ The upper extremities of the ribs H are curved i0 inwardly and then upwardly to slidingly engage the periphery of the member II as illustrated. Securedv to the inner face of each rib i2 is a “petal” Ill formed preferably of flexible sheet brass or other similar and suitable material. lb‘ Each petal is narrower at its lower end than its upper end so when assembled the “petals” will form an imperforate inverted frusto-conical basket surrounding the member H . The “petals” overlap as illustrated so that the basket may be % collapsed about the member II but the inherent . spring qualities of the ribs l2 will tend to main of the hole and hold the upper end of the bag in tain it fully expanded. contact therewith. From the foregoing and from the drawing it is obvious that the present cement basket is made up of a number of circumferentially overle'p— ping individual metal “petals” held in place with reenforcing spring steel ribs. The normal condi tion of the upper end of the basket is expanded so that it will conform to the diameter of the hole ' It is the principal object of my present inven tion to provide a generally improved collapsible basket structure of the character above discussed which is entirely metallic in construction and which will properly conform to the contour of w the bore without chance of by-pass openings due to folding or wrinkling. One form which the invention may assume is exempli?ed in the following description and il lustrated by way of example in the accompanying drawing, in which: ' Fig. l is a view partly in side elevation and ply in vertical section disclosing the preferred form of my invention. ' ‘ Fig. 2 is a plan view thereof partly in trans m verse section. _ of Fig. 1. . into which the member H is run on the well cas ing or tubing. When running in the hole, the upward force 01‘ the mud ?uid tends to close in the‘ "petals” to more or less conform to the out side diameter of the member H so that any dls- 5m tortion of the basket while it is being lowered into the hole is thus avoided. Immediately upon the member H, or the casing or tubing upon which the basket is mounted, coming to rest in the bore, , . 3 is a transverse sectional view ‘taken on line m4- ‘ ‘ the'mud pressure on the basket assembly is re- w lieved, permitting the “petals” to expand to their r normal position with the upper portion of the Fig. 4 is a view in elevation of one of thefpet- ' basket forming a seal against the wall of the hole. als” forming the basket. . It is thus obvious that thereafter cement or 45 Fig. 5 is a view in side elevation showing the other material may be ejected from the casing or 4'5 ' cement basket connected in a cementing string. tubing, or member H, above the basket, and that Referring more particularly to the accompany the latter will prevent its passing downwardly ing drawing, III indicates what is commonly. into the space around the tubing or casing below mown as a cement basket for use‘ in forming a 50 barrier between a well casing or tubing and the wall of the bore. - . This device consists'of a nipple II or a section of well casing or tubing or other cylindrical mem her which may be incorporated in a string of cas ‘m ing or tubing. ‘ ’ the basket. ‘ The present device has a varied number of 50 uses, but its principal use is on a combination string, that is, a single string of well casing com posed of an upper section of blank casing and a lower section of perforated casing, which is to be run into the producing zone. The basket is posi 2,117,:sse ,tioned between these two sections so that the concentric with respect thereto,'said basket com out the cement reaching the producing zone. While I have shown the preferred form of my invention, it is to be understood that various changes may be made in its construction by those skilled 'in the art without departing from the equal distancesv about said tubing and secured at their lower ends thereto and extending longitudi nally thereof with their upper ends spaced radi ally outward from the tubing, and a- “petal” like segment of relatively thin ?exible sheet metal secured ,to each rib, the contiguous edges of said “petals” circumferentially overlapping when the section of blank casing may be cemented off with- I prising a plurality of ?exible metallic ribs spaced spirit of the invention as de?ned in the appended claim. 10 Having thus described my invention, what I claim and desire to secure by Letters Patent is; In combination with- a well tubing, a frusto , conical basket therefor arranged about the ex basket is in normal position so as to enable the “petals” to move circumferentially with respect to each other and enable the basket to be col lapsed about said tubing, the upper extremities terior thereof with its smaller end tightly em of said ribs being curved inwardly and then up bracing said tubing and with its upper and larger end of a diameter normally considerably larger than the exterior diameter of the tubing and, tubing. wardly to slidably engage the exterior of said - ' REUBEN C. BAKER.