US1847885A

US1847885A - Well testing

Info

Publication number: US1847885A
Application number: US418919A
Authority: US
Inventors: Mchardie Edward Herbert; Nathan T Bradford
Original assignee: Individual
Current assignee: Individual
Priority date: 1930-01-06
Filing date: 1930-01-06
Publication date: 1932-03-01
Anticipated expiration: 1949-03-01

Description

Patentedl Mar. 1, 1932 `UNi'rED STATES PATENT? OFFICE EDWARD HERBERT MCHARDIE, F SAN J' OSE, AND NATHAN' T.BRA.DFORD, OF Tm BELLA, CALIFORNIA 7 WELL TESTING Application filed January 6, 1930. Serial No. 418,919.

rIhis invention relates particularly to a means and method of sampling the liquid content of the several strata through which the well is being driven.

It is one object of the invention to provide a method whereby samples of liquid from a given stratum may be obtained without becoming contaminated by an admixture of liquid from an overlying stratum.

It is another object of the invention to provide a method whereby the liquid content of any given stratum may be obtained as the boring of the well progresses and Without becoming contaminated by an admixture of liquid from overlying or underlying strata.

It is also an object of the invention to provide a means for sealing off the lowermost portion of the well from the upper portion and means for extracting liquid from the sealed off portion without permitting its admixture with liquid in the said upper portion of the well.

It is still a further object to provide a means for Washing out the sealed olf portion of the well independently of the upper portion.

In the drawings:

Figure 1 is a sectional view of one embodi ment of the invention positioned in a well,

. parts broken away.

Figure 2 is a section on line 2 2 of Figure l.

Figure 3 is a section on line 3-3 of Figure l.

In the embodiment of the invention as herein disclosed we show at 1 a bore of any suitable size and depth such as commonly made when boring for water. It being assumed that it is desired to secure a sample of the water immediately below the bottom of this bore, the procedure is as follows:

IVe provide a casing of somewhat less Idiameter than the bore 1 as shown at 2, and on the lower end of this casing is mounted a head 3. The head 3 has an orifice 4 formed in the center thereof controlled by a flap valve as 5. Concentrically mounted on the head 3 and within casing 2 and spaced a distance therefrom is a second casing 6, both casings passing upwardly to the top of the well, the

sections being connected by bearing members as 7'.v The bearing members and the head are provided with conduits as 8 and 9 respectively so that water may be fed downwardly between the casings and through the head 3. In the casing 6 is mounted a lift pump 10, its valve being indicated at 11.v

The bottom of head 3 has a centrally disposed threaded recess formed therein as at 12, and around the edge of the recess is formed a channel 13.

At 14 we show a complementary head portion havingthreaded engagementv with portion 3 as at 15, the upper and outer edge 16 aligning with the opposing edge of the head` portion 3, and the outer surface of the portion 14 curving inwardly and downwardly as at 17 to form an annular curved seat for the purpose hereinafter set forth. In the bottom of part 14 is mounted a perforated casing as 18, this casing being concentrically disposed relative to the axis of revolution of the member 14 and having a diameter substantially less than that of the member 14 at its widest part. Mounted upon the lower end of the casing 18 is a head member 19 having an orifice 20 formed therein and carrying a drill 21 which also has a passage 22 formed therethrough to ali with the orifice 20. A conduit 23 is seate in the

head members

14 and 19 and within the casing 18 to form a continuation of the conduit 20-22, this conduit vcommunicating with the channel by means of conduits 24, so that water fed down through conduits 9 will flow through the conduits 23-22-20 and into the Well. In the upper surface of part 14 is formed a pocket 25 communicating with the orifice 4, and at 26 are conduits connecting the pocket 25 with the chamber between conduit 23 and perforated casing 18.

By means of the foregoing construction water may be fed into the bottom of the well during .the final drilling and cleaning operation without mixing it with Water from the overlying strata, and a discharge line is provided that is completely closed olf from the Well and the feed line, through the use of a hollow pump rod 28.

Assuming that the bore 1 has been driven to some depth and it is desired to secure a sample of the water in the stratum immediatemounted on the con on one side of said head, and drilling means duits on the other side 1y below before the bore is carried thereof the head.

through, the procedure is as follows.

The structure 2--26 having been assembled as hereinbefore described the drill 21 is put to work to form the bore 27 of less diameter than the bore 1. This operation is continued until the head portion 14 reaches the beginning of the smaller bore where its rotary movement causes it to form a shoulder 29 and to seat itself tightly thereon in such a manner as to effectually seal oil.' the bore 27 from the bore 1. During this drilling operation water is fed down through

condults

9, 24, 23, 20, and 22 and into the well, and thence upwardly to discharge at the top of the well in the usual manner until the head 14 is seated to seal oi the bore 27 as above set forth. When the seating of head 14: has been e'ected the pump 10 is put into operation and the liquid contents of bore 27 is raised p to the top of the well. It is obvious that after the mixture made by the drilling operation has been pumped out the operator will obtain water iowing in from the strata through which the smaller bore 27 passes, uncontaminated by water from any other stratum, and consequently enabling him to determine positively the quality of the water to be obtained at that point.

It is to be understood, of course, that while we have herein shown and described but one specific embodiment of the invention, changes in form, construction, and method of assembly and operation may be made within the scope of the appended claims.

We claim:

1. In a device of the character described, a head member adapted to be lowered into a. well and movable into intimate contact with the wall of the well tol form a seal, a pair of conduits passing therethrough and extending to the top of the well and closed off from the water in the well above said head and from each other, a pump mounted in one conduit, a perforated casing depending from said head, a drill mounted on the bottom of said casing, the said casing communicating with the conduit in which the pump is mounted, and a conduit mounted Within the casing and communicating with the exterior of the drill and with the other of said first mentioned conduits and closed oi from the perforated casing.

2. In a device of the character described, a head member adapted to be lowered into a well and movable into intimate contact with the wall of the well to form a seal, a pair of conduits, one within the other, seated in each end of said head, a passage connecting the inner conduit on one end of the head with the outer conduit on the other side of the head, pumping means mounted in a conduit EDWARD HERBERT MCHARDIE.

NATHAN T. BRADFORD.