US1485512A - Liner - Google Patents

Description

FRANK LE COGQ AND IBWIN-LE COCQ,.OF ABERDEEN, SOUTH. DAKOTA; SAID FRANK LE COCQ ASSIGNOR TG SAID IRWIN LE COCQ.

LINER Application led February 28, 1922. Serial No. 539,989.

To all whom it may comem:

Be it known that we, FRANK Lr. Coco and IRWIN Lr: Coco, citizens of' the United States, and residents of Aberdeen, in the 5 county of Brown and State of South Dakota, have invented certain new and useful Improvements in Liners, of which the following is a specification.

This invention relates to liners especially adapted for use in deep wells. v

Briefly stated an important object of this invention is to provide a well casing consisting of inner and outer spaced tubes 4between which a quantity of cement or other suitable filling is arranged so that when the inner section disintegrates as a result o contact with the impurities in the products of the well the conduit formed by the filling of cement will greatly prolong the life ofthe well.

A further object of the invention is to provide novel means whereby the inner and outer sections may be properly spaced so as to provide a cement pipe of a uniform thickness throughout.

A further object of the invention is to provide a lining for wells which is of highly simplified construction, durable in use and cheap to manufacture.

Other objects and advantages of the invention will be apparent during the course of the following description.

ln, the accompanying drawing forming a part of this application and in which like 35 numerals are employed to designate` like parts throughout the same,

Figure 1 is a. fragmentary vertical sectional view of the improved well casing, the view illustrating place.

the cement filling in Figu re 2 is a similar view, the'viewillustratiiig the means for filling the space between the inner and outer pipes with cement.

Figure 3 is a horizontal sectional view taken on -line 3A-,3 of Figure 2.

ln the drawing wherein for the purpose of illustration is shown a preferred embodiment ofthe invention the numerals 5 and 6 generally designate inner and outer spaced 5 sections, each of which may consist of a plurality of sections of diiierent diameters. As illustrated in Figure 2 the several sections of .the inner casing are joined by couplings 8 with which collars 9 may be engaged, said collars being provided with radial arms 10 which engage the outer casing v so as to maintain the outer casing a uniform distance from the inner casing at all times. lt will be seen that the couplings 8 of which there maybe any desired number not only form a means `for connecting the sec- Ations of the 'inner casing but also limit the downward movement of the several collars 9.

'lo allow the well to continue to flow after the casing 5 disintegrates we provide a lining or filling of cement 12 betweenvthe inner and outer casings and the said cement is introduced into the space between the casings in a fluid state and is allowed to set thereby forming a cement conduit.

lThe cement is introduced into the annular chamber between the casings by means of a pipe l'which is arranged in the annular chamber and is withdrawn as the level of the cement rises. The spacing arms 10 serve as a reliable means for maintaining the outer casing 6 a uniform distance from the inner casing 5 so that the wall of the intermediate casing is of a uniform thickness throughout.

With reference to the foregoing description taken in connection with the accom-- result of continued* contact with the iin-` purities in the liquid.

n carrying out the invention the outer casing 6 may vary in size and in that case sections of dierent sizes are joined by annular securing elements 20 of rubber or other suitable material and by reference to Fig. 2 it will be seen that one of the rubber sealing elements 2O forms the bottom wall of the annular chamber into which the cement is introduced..

As stated in the matter be inning on line 590i United States Patent 1,050,244, Jan. 14, 1913, to Andrew Smith it has been proposed to seal the annular space between the outer curbing or casing and the bore ofthe well by illing the same with cement forced downwardly from the top. If any obstruction occurs in the space surrounding the casing, theflow is stopped, leaving the lower part of the casina` unsealed thereby defeating the purpose of filling the space with cement.

-Having thus described the invention what we claim is l. In an oil Well, the combination of inner and outer spaced casings, a filling of cement between the inner and outer casings forming a conduit for use subsequent to the, disintegration of the inner casing as the result of contact with the impurities in the oil, collars mounted on the inner casing and having radial spacing arms engaging the outer casing whereby to maintain the inner and outer casings in uniform spaced relation throughout,said inner casing being formed with a plurality of connecting couplings engaged by said collars and holding the collars in spaced relation.

2. In an oil Well, the combination of inner and outer spaced oasings, a filling of cement between the inner and outer casings 'forming a conduit for use subsequent to -the disintegration of the inner casing as the result of contact with the impurities in the oil, collars mounted on the inner casing and having radial spacing arms engaging the outer casing whereby to maintain the inner and outer casings in uniform spaced relation throughout, l said inner caslng being'formed with a plurality of connecting couplings engaged by said collars and holding the collars in spaced relation, and means whereby to lill the space between the inner and outer 'casings with cement in a liquid state, said means comprising a pipe lowered from the surface and adapted to discharge the cement in a liquid state into the space between the inner and outer casings.

FRANK LE CUCQ. IRWIN LE COCQ.

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