US1786897A

US1786897A - Oil-well-testing device

Info

Publication number: US1786897A
Application number: US165984A
Authority: US
Inventors: Ernest H Cox
Original assignee: Individual
Current assignee: Individual
Priority date: 1927-02-04
Filing date: 1927-02-04
Publication date: 1930-12-30
Anticipated expiration: 1947-12-30

Description

' Dec. 30, 1930.. f E, ,ll-L (30X OIL wELI. TESTING DEVICE Filed Feb. 4, 1927 Patented Dec. 30, 1930 ERNEST H. COX, OF DUNCAN, OKLAHOMA OIL-WELL-TESTING DEVICE Application led February 4, 1927. Serial No. 165,984.

' This invention relates to well drilling apparatus and has special reference to means 4 for testing wells in order to ascertain whether or not oil, water, or the like are in the path 6 of the hole being drilled, i. e., in the stratum which has been reached by the drill bit but which has not as yet been bored through.

The invention disclosed herein is an improvement over my prior Patent No. 1,347,534, granted July 27, 1920.

An object of the invention resides in the provision of a simple and inexpensive means by which a sample of the oil, sand,water or the like at the bottom of the hole being bored 15. may be brought to the surface for examination and analysis prior to the time of sinking the expensive well casing which is ordi-v narily provided.

Another object of the invention resides in the construction of such a device combined with an effective and reliable device which will function to shut off slush, mud, water, etc., which is in the bottom of the well from the liquid in the lower stratum from which the sample is to be taken.

Other objects and advantages 'of the invention will be apparent from the followingdescription when taken in connection with the accompanying drawing; in which Figure l is a vertical longitudinal section ythrough the vtesting device. 1

Figure 2 is an elevational view thereof.

-Figure 3 is a section taken on line 3-3 of Figure 1. Figure 4 is a section taken on line 4-4 of Figure 1.

Figure 5 is a sectional View through the apparatus` when the

openings

14 and 15 are in registration; and

Figure 6 is a section taken on line 6--6 of Figure 1.

Referring tothe drawing in greater detail the numeral 1 designates a drill stem of any ordinary or conventional form and to the lower end of which is threadedly or other- Wise attached my novel testing device re-A ferred to generally by the numeral 2.

The testing device consists primarily of a tubular member 3 provided with a head 4 and 5o a. shoulder or abutment 5, threads 6 being is threaded to the lower end of this section.

`As indicated in Figure 1 of the drawing a coil spring 12 encircles the upper end` of the tubular member 3 and has its upper end in engagement with the head 4 and its lower end in engagement with the stopper `10 and 65 sleeve 8.- f

In assembling the device thus far described the nipple 11 is threaded to the stopper or pipe se'ction 9 and this element then slipped over the sleeve 8 and threaded to 70 the upper end thereof. The coil springv 12 is then passed over the tubular member 3 with the upper end encircling the abutment 5. Next the combined sleeve and stopper 8 10 is slid over the lower end of the tubular V7a member against the pressure of spring.' 12, and the cap 13 is then threaded to the lower end of the member 3. v

Both the tubular member 3 and the sleeve 8 are provided with symmetrically arranged s@ series of perforations or

passages

14 and 15 respectively and in order that the series of perforations may always be maintained in perfect alignment a key 16 extends inwardly of the sleeve 8 and is received in the longitue5 dinally extending slot 17 formed in the lowery 1(3nd of the outer wall of the tubular mem- In operation, the parts being in the position shown in Figure 1, with the perforations a? 14 and 15 out of registration dueto the fact that the spring 12 is forcing the sleeve 8 downwardly so that the'sleeve 8 is in engagement with the cap 13, the device is lowered into the hole being drilled until the stopper c; l0 engages the small pocket previously formed at the bottom of the well by means of the drill bit. Engagement of the stopper with the walls lof the pocket will of course limit further downward movement of the 1.0

Vus

sleeve 8 which is secured to the stopper 10.

rations

14 and 15 will register and a sam le of l the oil or other liquid in the pocket wil pass into the interior of the tubular member. In

this position of the parts the stopper 10 will of course seal off the mud, slush, etc., above the perforations 14-15 thereby preventing the entrance of any of this undesirable matter int-o the testing device while the perforations are in register. Raising ofthe drill bit and testing device will allow the spring 12 to move the sleeve 8 downwardly with respect to the tubular member and thus close the passages 14-15, whereby the sample of the material may be carried to the top of the well.

Due to the construction and operation ust described it will be apparent that the present device is of especial value in testing wells for the reason that uncontaminated samples of the liquid may be readily obtained previous to the process of installing the expensive well casing. It will also be observed that the construction itself is simple and reliable in operation, of few parts which may be readily assembled, and'that the entire device is comparatively inexpensive.

In accordance with the patent statutes I have described what I now believe to be the best embodiment of the invention, but I do not wish to be understood thereby as limiting myself or the scope of the invention, as many'.

changes and modifications may be made without departing from the spirit of the invention; all such I aim to include in the scope of the appended claims.

lVhat I claim as new and desire to secure by Letters Patent is:

1. In a device of the class described a tubular' member adapted to be secured to the lower end of a drill stem, a sleeve encircling said tubular member and mounted for sliding movement with respect thereto, a stop er and packer element also encircling said tubular member and secured to the upper end ot' said sleeve, said tubular member and sleeve provided with perforations adapted to register when the sleeve is at the upper limit of its sliding movement, and means normally holding said sleeve in a'position in which said perforations are out of register.

2. [n a device of the class described a tubular member adapted to be secured to the lower end of a drill stem, a sleeve encircling said tubular member and mounted for sliding movement with respect thereto, a rubber stopper also encircling said tubular member and secured to the upper end of said sleeve, a

ERNEST H. COX.