SU857461A1 - Sample-taking dredger - Google Patents

Description

(54) SPRAY SHELL

I

This invention relates to a device for sampling mechanical means. mi, and more specifically, for collecting pressurized samples of formation fluid and gas from the bottom of the well. The eye is designed for use in the practice of geological exploration and prospecting, in particular in geochemical exploration for oil and gas.

Auger drill bit is known, including a hollow auger cap and sampler, the bit has a hollow shank with side windows spring-loaded with respect to the auger column, and the sampler is provided with a spring-loaded valve with a player for interacting with the bit in the lower part and fi of the upper part has a valve for vacuum til sampling device

The disadvantage of this sampling projectile is the impossibility of withdrawal. analysis of fluid samples from the bottom hole during drilling and flushing, and, consequently, in limiting the possibility of sampling

fluid in wells of considerable depth- (up to thousand m), drilling without flushing is impossible.

Also known is the sampling, which includes a string of drill pipes, and a screw tip that is movable relative to the string of drill pipes, with a closed sampler with a valve and an OKHaMHC2J inlet pipe.

This sampler is reset.

to from the surface into the drill pipe and transported to the bit, where it is installed in the working position, after which it is passed through the drill pipe and introduced

fS downhole of the screw auger n produces a fluid flow from the flux.

The disadvantage of this screen is that. what when retrieving it when

The ID is raised above the bottom, the drilling fluid in the well under hydrostatic pressure, beyond the reservoir pressure, will penetrate into the sampler and contaminate the sampled sample. This reduces the quality of the sample. The purpose of the invention is to show the quality of the sample being taken ...

This goal is achieved by the fact that the sampler is mounted on a string of drill pipe, and the snoop tip is mounted concentrically on the sampling (the hub is connected to the bayonet joint, the sampler is provided with a rock-breaking chisel with side windows installed with axial displacement relative to the sampler and alignment of the side bend. sampler windows at the extreme upper position of the screw tip. .

FIG. 1 shows auger drill rig, general view; in fig. 2 - the same, 41 when sampling; in fig. 3 is a sectional view in FIG. one; in fig. 4 is a section BB in FIG. 3, ,

The sampling device includes a housing 1 with screws, in the cavity of which a hollow shank 2 of a bit 3 is placed. In the lower part of the shank there are windows 4, and its upper part interacts with a spring 5 entering the hollow shank 2. Movable relative to 1, sampler 6 It has windows 7 and a valve 8, a valve raising spring 9 and a saddle 1O, the valve 8 has a guide shaft 11 of the shaft. The stiffness of the spring 9 of the valve 8 exceeds the stiffness of the spring 5. The upper part of the sampler 6 is equipped with a hollow adapter 12 for connection to the jibiMH drill pipe 13. In the adapter 12 there are holes 14 for the passage of the sample and the transverse finger 15 is located, which is inaccessible with the G-groove 16 of the Sleeve 17 housing 1. To fix the sampling chamber in housing 1, a nut 18 serves. Adapter 12 in the upper part is provided with a valve 19 for evacuating the sampling chamber 6. The operation of the sampling projectile is carried out in the following way.

In advance of E5), a borehole is lowered by a screw sampling device with a preactivated sampler 6 and drilled to the full height of the housing auger 1. When the burrowing finger 15 is located in the front section of the L-shaped groove of the sleeve 17 and transmits through it the torque to the housing.

After zaburk, hphobobs rnogo yes, it is lifted above the face by mm. In this case, an isolated cavity forms between the bottom of the well and the drilling projectile, where fluid (gas or liquid) comes from the formation. Then, by rotating the drill string to the left by 90, and this means turning. walknaya 12, output t finger 15 from the horizontal portion of the groove 16 of the sleeve 17

in a vertical section. Under the influence

the weight of the string of the sampling chamber moves downward at a stroke equal to the length of the vertical section of the L-shaped steam, by 16. The weight of the sampling chamber 6 with the drill pipe 13 is transmitted

5 through the guide shank 11 of the valve stem 8 to the chisel 3. The chisel moves downward into the scoop of the window 3 of the shank 2 and 1, e created by the lifting of the projectile and the sampler windows 6 are aligned.

0 The spring 5 of the shank is compressed and when fully compressed, the combined windows 3 and 7 are below housing 1. Then, under the action of the drill pipe string 13 and the sampler 6, we begin 5 to compress the spring 9 of valve 8. The valve 8 rises above the saddle U and opens the outlets in the saddle in sampler 6, together in such a manner a vacuumized cavity with a 1-zone. If the formation from which the sampling is carried out is dry, then a gas sample is drawn into the cavity of the chamber, if the formation is watered, then a sample of the LIQUID with dissolved gas enters.

When lifting the drill pipe 13, the shafts 12 together with the sampling chamber 6 will rise, because the IS finger can move upwards along the vertical section of the L-shaped groove of the sleeve 17. In this case, the spring 9 will open the valve 8 and the spring 5 will return the shank 2 bits 3 BHytpb Corps I. By further lifting the drill string, the drill string is removed daily by the upper arm and the ground test is extracted through the fan 19.

The sampling gear ensures the selection of representative and

50 non-contaminated (for example, drilling mud) 1f of fluE from a reservoir, with its chemical basis, preserved in a chemical state, close to the reservoir state. Snar d gives you the opportunity with less cost

55 than when working with mass-produced; To obtain information on the gas background of the area and to identify abnormal areas.

Claims (2)

1. Author's testimony of the USSR No. 605953, cl. E 21 V 49/02, 1976. 2.Pate "g USA number 2557925, cl. 175-233, publ. 1951 (prototype). FE / g Aa /four