CN2161718Y - Regulating device for inner barrel of core-drilling tool - Google Patents

Abstract

The utility model relates to a device used for regulating the distance of a core-drilling tool, composed of a male buckle safety joint and an inner barrel. The middle of the joint is provided with a locking screw 3, and the lower part of the joint is connected with a bearing box 2. The device is connected with a drilling bit through a drilling tool. Using the device can regulate distance between the inner barrel of the core-drilling tool and the inner step of the drilling bit to ensure that the inner barrel of the core taker is in the center; cores are easy enter the inner barrel, and the device can be reasonably used when a core-taking drilling bit is replaced. The utility model can be widely used in the core-drilling tool of petroleum, coal fields and common geological exploration.

Description

Regulating device for inner barrel of core-drilling tool

The utility model belongs to a kind of petroleum geology exploration drilling extracting core instrument, particularly a kind ofly regulates in the drilling extracting core instrument in the inner core and drill bit the device of distance between the shoulder.

Drilling extracting core work is a kind of requisite technology among geological prospecting, must regulate in the coring tool distance between the step in the inner core and drill bit in order to improve coring recovery rate, only in this way, just can make the inner core in the corer guarantee that between two parties core is easy to into tube, and make coring tool when changing the coring bit of different model, can rationally assemble.

Now in the technology two kinds of adjusting devices are arranged at present.A kind of is to regulate with pad pad is added on the bearing retainer, or is added on the clip seated connection head, reaches the adjusting purpose of the upper and lower operation of inner core with the method for increase and decrease pad.The shortcoming of this device is the distance weak point that dismounting inconvenience is regulated.Another kind is the screw thread of lengthening return connector and inner core, and shortcoming is that structure design is unreasonable, is easily damaged by the drilling fluid erosion; And the distance of regulating is very limited, and is subjected to the restriction of inner diameter of steel flue and wall thickness, and when tube was got core in being used as, inner core can not be changed.

The purpose of this utility model is in order to overcome the deficiency in the above-mentioned drilling extracting core instrument, and provide a kind ofly grow in distance adjustment inner core and the drill bit device of distance between the shoulder.Adopt this device can reach the purpose of " adjusting ", can not add under any joint prerequisite at urceolus again, the urceolus place under repair of corer.

The utility model is to realize like this.

It is a kind of improvement to former drilling extracting core instrument.During use, this device is as long as insert above the drilling tool, the work of getting final product of joining of its lower end and drill bit.This device itself is that the male thread on the box thread of pin thread safety joint 1 and the bearing box 2 is joined, and is called as the adjusting screw thread.

Two " O " shape sealing rings are housed in the middle of this bearing box, are used for protecting screw thread, prevent that drilling fluid is in this formation " loop " and erosion drilling tool screw thread.A spline structure is arranged at bearing box top, and there is shoulder at the two ends up and down of spline.When service kit, can withdraw from, rest on the position of regulation from the limitation locking screw position, and then the rolling bearing box, inner core is moved up and down, when moving to upper and lower extreme position, spacing by the limitation locking screw.Block upward (descending) shoulder on the bearing box, prevent that inner core from coming off.When being transferred to correct position, spacing, lock screw is screwed in the keyway on the bearing box, prevent coring tool when work, inner core rotates, thereby guarantees that inner core is constant with the gap of the interior shoulder of drill bit.The core of being got has higher yield rate.

The length way of regulating the lock screw screw thread is looked available the urceolus of being repaiied and is buckled required length and determine.That is to say that the corer urceolus is buckled non-damageable area can correspondingly shorten the length of regulating screw thread.Otherwise, the length of the screw thread that can suitably extend.Principle is that the urceolus that guarantees rapid wear is buckled in when repairing screw thread, and no longer car is considered inner core length to be worth doing, so just can remove the urceolus joint of conventional instrument, avoids the generation of trouble of lost tool in hole accident.

Advantage of the present utility model has been to overcome the shortcoming of two kinds of adjusting corers of existing technology inner core distance means, makes simple to operate easy to maintenancely, has also increased corer function in the existing technology, thereby has reduced the coring tool maintenance load.Because this installation cost is low, dependable performance, alternative import corer, single cross rate is an import price 1/4.

The utility model is provided by following examples.

Below in conjunction with accompanying drawing the utility model is described further.

Fig. 1: drilling extracting core instrument inner core adjusting device structural representation.

The utility model is made up of pin thread safety joint 1, bearing box 2, limitation locking screw 3, sealing ring 4, inner core 5, and this device is a kind of device that is used for regulating distance between coring tool inner core and the interior shoulder of drill bit; It is characterized in that in the middle of the described pin thread safety joint 1 lock screw 3 being arranged, this screw top shape is a step garden column cap body, connect with box thread and bearing box 2 under the pin thread safety joint 1, thereby rolling bearing box 2 can make corer inner core 5, upper and lower moving reach the purpose of regulating distance between interior shoulder of drill bit and the inner core.Two rubber " O " shape sealing ring 4 is arranged in the bearing box, can guarantee transfer apart from the time, screw thread is not subjected to the erosion of drilling fluid, have above the bearing box 2 together along the equally distributed spline of garden side face, the upper and lower end of spline has a shoulder, when limitation locking screw 3 precession keyways, and bearing box is locked, at this moment, be duty, when limitation locking screw 3 screwed out keyway, rotatable bearing box 2 was to the adjustable range state.When being adjusted to correct position, can preventing coring tool in the keyway with limitation locking screw 3 screw-in bearing boxs 2 corer inner core rotation phenomenon takes place when getting core.Thereby the distance that has guaranteed shoulder in corer inner core and the drill bit is constant and placed in the middle, and core is fallen among the corer inner core exactly.

Claims (3)

1, a kind of device of distance that is used for regulating in drilling extracting core instrument inner core and the drill bit between the platform is made up of pin thread safety joint 1 and inner core 5; It is characterized in that in the middle of the described pin thread safety joint lock screw 3 being arranged, its underpart is by box thread and bearing box 2 connections, and this installs its top and connects mutually with drilling tool, and the bottom connects mutually with drill bit.

2, device according to claim 1; The top shape that it is characterized in that lock screw 3 is a step garden column cap body.

3, device according to claim 1 is characterized in that, two rubber " O " shape sealing ring 4 is arranged in the bearing box, and a spline is arranged on bearing box, and there is a shoulder lower end.

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