US1974664A

US1974664A - Tubing bottom

Info

Publication number: US1974664A
Application number: US584633A
Authority: US
Inventors: Thomas C Patten
Original assignee: Individual
Current assignee: Individual
Priority date: 1932-01-04
Filing date: 1932-01-04
Publication date: 1934-09-25
Anticipated expiration: 1951-09-25

Description

ThomiasC. Patten;

T. C. PATTEN TUBING BOTTOM Filed Jan. 4, 1952 00W@ 0 @QQ Q Q Sept. 25, 1934.

Patented Sept. 25, 1934 UNITED s'rll'ras PATENT OFFICE TUBING BGTTOM A Thomas C. Patten, Tyler, Tex. Application January 4, 1932, Serial No. 584,633

2 Claims. (Cl. Z55-61) This invention relates to a tubing bottom. One object of the invention is to provide a well tubing having a novel type of bottom which is provided with blades for the removal of the formation beneath upon the rotation of the tubing and which has suitable inlet openings for the inflow of oil from the oil bearing stratum.

In the production of oil the well is drilled into the pay sand, that is into the stratum bearing 1l) oil and the drilling tool is then withdrawn and a tubing is lowered into the hole through which the oil flows into the ground surface. The tublng commonly used may be open at its lower end ormay have a perforated section at its lower end `1li or a joint of conventional screen. Under present drilling conditions it is often desirable or even necessary to limit the flow of oil from a well and consequently the Well is usually drilled only a short distance into the pay sand, and a conf ventional type of tubing above referred to is then 1 26 stratum is exhausted it then becomes necessary or desirable to deepen the well. At the present time with the type of tubing now commonly used in order to deepen the well the tubing must be removed and a drilling tool attached to the 30 lower end of the drill stem and let down into the well to deepen it, and when deepened the Adrill stem and tool must be withdrawn and the tubing again set in place in the well and swabbed in order to start the flow as before. This operation necessitates the movement of the necessary equipment onto the location and consumes much time and adds to the expense of production. It is the prime object of this invention to provide a tubing bottom of such construction as to permit the inflow of the production while the well is pro'- ducing and of such formation that when it is desired to deepen the well, the tubing may be rotated and the well thus quickly deepened further into the pay sand. v,

Another object of the invention is to provide a tubing bottom which will catch objects such as swabs and the like, that may be accidentally dropped into the tubing and which may be withdrawn when the tubing is withdrawn. At the present time tubing commonly used as above stated is open at the bottom so that objects dropped through the tubing will pass on out into the bore and will later give trouble when it is desired to deepen the well.

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

Figure 1 shows a side view of a tubing equipped with the novel type of bottom and shown located in the well.

Figure 2 shows an enlarged side view, partly in section of a tubing bottom.

Figure 3 shows a side view of a modified form thereof, and

Figure 4 shows a bottom end view.

Referring now more particularly to the drawing wherein like numerals of reference designate similar parts in each of the figures the numeral 1 designates a tubing located in a well bore 2 and whose lower end extends down into the pay sand 3. Fastened on the lower end of the tubing `there is a shell 4 of an approximately inverted 75 conical shape and whose lower end has the external blades 5 which are preferably spiralled forwardly and extend out laterally from the shell. Three of these blades are shown but any number may be employed, and they extend down be- 30 neath the shell and are integrally joined together Vat the axis of the shell. The upper end of the shell is internally threaded to receive the externally threaded lower end of the tubing and between the blades the lower end of the shell has 35 the inlet openings 6. These openings are preferably triangular in form with their apex upwardly and they are relatively large to permit the required inflow of fluid from the sand. It will be noted that the walls of the shell are of substantially uniform thickness and the shell is made hollow so as not to restrict the inflow of the fluid. If desired, the lower end of the shell may also have an axial opening 7 providing for the inflow of uid from the bottom of the bore.

In the form shown in Figure 3 the shell is extended upwardly forming a tubular shank 8 which has the perforations 9 and whose upper end is internally threaded to receive the lower end of the tubing. The perforations 9 provide for the 100 inflow of additional fluid in case the openings 6 and the bore 7 are inadequate for that purpose.

When the oil in the pierced stratum has become exhausted and it is desired to deepen the bore, tongs may be applied to the upper end of the tubing at the ground surface and anadequate force of men may by the use of said tongs rotate the tubing until the bore is deepened the required amount and the tubing may then be again swabbed, if necessary, and the flow started. il@

The drawing and description disclose what is now considered to be a preferred form of the invention by way of illustration only, While the broad principle of the invention will be defined by the appended claims.

What I claim is:

1. The combination with a well tubing, of a tubing bottom on the lower end thereof, said bottom being shell-like in form and of a tubular shape, the Walls of said bottom being of approxmately the same thickness as that of the tubing 2. 'I'he combination with a well tubing of a tubing bottom on the lower end thereof, said bottom being shell like in form and of tubular shape and having an elongated upwardly extended shank formed integrally therewith, the Walls of said bottom being of approximately the same thickness as that of the tubing and the inside of the diameter of the bottom being substantially the same as that of the tubing to provide an unobstructed passageway for fluid down through the tubing and bottom, the lower end of the bottom being slightly contracted and having unobstructed side inlet openings' and a central bottom opening, external radiating blades formed integrally with the sides and lower end of the bottom between said side openings, the lower ends of said blades being joined integrally togetherA across the lower end of the bottom, the upper end of the shank being internally threaded and said shank being perforated therealong approximately from said threaded portion to the upper ends oi' the blades. I

THOMAS C. PATIEN.