CN202189003U - Novel rock core holder for indoor displacement experiments - Google Patents

Novel rock core holder for indoor displacement experiments Download PDF

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Publication number
CN202189003U
CN202189003U CN2011203426173U CN201120342617U CN202189003U CN 202189003 U CN202189003 U CN 202189003U CN 2011203426173 U CN2011203426173 U CN 2011203426173U CN 201120342617 U CN201120342617 U CN 201120342617U CN 202189003 U CN202189003 U CN 202189003U
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CN
China
Prior art keywords
rock core
socket
pressure cap
processed
wedge shape
Prior art date
Application number
CN2011203426173U
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Chinese (zh)
Inventor
李斌会
杨清彦
鲁应平
金禹含
王瑞晗
费春光
Original Assignee
中国石油天然气股份有限公司
大庆油田有限责任公司
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Application filed by 中国石油天然气股份有限公司, 大庆油田有限责任公司 filed Critical 中国石油天然气股份有限公司
Priority to CN2011203426173U priority Critical patent/CN202189003U/en
Application granted granted Critical
Publication of CN202189003U publication Critical patent/CN202189003U/en

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Abstract

The utility model relates to a novel core holder for indoor displacement experiments, which solves the problems that the traditional novel core clamp holder has an overlarge dead volume and a thick and bulky appearance, and a sleeve and a core sample is complex to replace. The specific technical scheme is that the two ends of a core sleeve of the clamp holder are flared, and the core sleeve is provided with a wedge-shaped sheath in a matching manner so that the sleeve is simple and convenient to replace; and an O-shaped rubber sealing ring is used for sealing between the core sleeve and a barrel, and has good sealing effect; a core end socket adopts an embedded structure and is also provided with a crescent-shaped trench-type baffle; therefore, the dead volume of the holder is substantially reduced, and the core sample is simpler to assemble and disassemble. The novel core holder has very compact integral appearance and exquisite structure.

Description

A kind of new indoor displacement test is used core holding unit

Technical field

The utility model relates to a kind of a kind of test, testing tool that uses in the oil-field development laboratory.Concrete is a kind ofly is used for unstable state method test rock two mutually or the core holding unit in the three-phase fluid relative permeability experiment flow, and this clamper also is suitable for displacement test in other indoor one dimension column core chamber.

Background technology

Fluid relative permeability mensuration is one of most important fundamental analysis project in oil-field development laboratory in the rock, and its precision of test result directly influences the Oilfield developing effect.Core holding unit is clamping of a kind of ability and sealing rock core, accomplishes the isolated plant of heterogeneous fluid fluid ability test in the rock core.The main effect of this device is that column core sample to be measured is put into wherein, and when guaranteeing test fluid flow through the core sample rear and front end, the rock core side surface can seal up fully, possesses less dead volume simultaneously.Dead volume is meant when pack into clamper and by after the confined pressure sealing of rock core, clamper work chamber internal flow cumulative volume and rock core outward appearance volume poor.This volume is more little, and the precision of test result is just high more.

The clamper of fluid relative permeability is generally taked the Ha Shi core holding unit in the current domestic and international unstable state method test rock.In concrete experimentation, mainly there is following some deficiency in the Ha Shi core holding unit:

(1) system's dead volume is excessive, and internal diameter is that its dead volume of Ha Shi core holding unit of 2.5cm is at 3.2cm 3~ 3.8cm 3Between, and the volume of voids of tested core sample is generally at 7cm 3~ 12cm 3Between, so big dead volume will have a strong impact on the accuracy of experimental result;

(2) changing sleeve wastes time and energy, because the rubber bush that in experimentation, seals in the clamper has damage in hyperbaric environment following time, must in time change.Conventional Ha Shi core holding unit sleeve exchanging gets up to waste time and energy, and the end cap at sleeve two is difficult to be inserted in the sleeve, and sleeve of every replacing probably needs the time of 10-15min;

(3) volume is excessive, and loading and unloading sample complicated steps is inconvenient to operate.

Summary of the invention

The purpose of the utility model is exactly to measure the above-mentioned defective that used core holding unit exists in the test of fluid relative permeability in the rock to present unstable state method, design and provide a kind of dead volume less, change time saving and energy saving, the small and exquisite novel core holding unit easy and simple to handle of profile of sleeve.

For realizing the foregoing invention purpose, the technical scheme that the utility model adopts is: a kind of new indoor displacement test is used core holding unit, comprises the pressure cap at wedge shape sheath, rock core end socket and the cylindrical shell two ends of cylindrical shell, rock core sleeve, rock core sleeve; Said cylindrical shell is the cylindric of stainless steel material, and the two ends of cylindrical shell are processed with external thread respectively, is processed with the external pressure hole at the axial centre point place of cylinder body outer wall, is welded with above the external pressure hole and the extraneous pipeline that is connected at this; Said rock core sleeve is the cylindric of rubber material, and the two ends of rock core sleeve are processed as bell mouth shape; The wedge shape sheath of said rock core sleeve; Form by a band of column portion and a conical ring portion; Wherein the loudspeaker oral area of the structure of wedge shape sheath conical ring portion and rock core sleeve is corresponding, and when the conical ring portion of this wedge shape sheath was inserted in the loudspeaker oral area of rock core sleeve, the two sealed contact; Outer wall in wedge shape sheath band of column portion is processed with annular groove along circumference, this annular groove liner O RunddichtringO, and the internal diameter of the band of column portion of wedge shape sheath and conical ring portion equates in addition; The rock core sleeve integral body that two ends are inserted with the wedge shape sheath is encased in the cylindrical shell, presses the storehouse at the ring that has surrounded a sealing between cylindrical shell and the rock core sleeve, under the effect of wedge shape sheath and O RunddichtringO; Said rock core end socket comprises the right end socket of rock core left side end socket and rock core, and the body of the left and right end socket of rock core is column, and the two is inserted in respectively in the left and right wedge shape sheath, and rock core sleeve and left and right rock core end socket have surrounded the rock core storehouse; And the left and right end socket of rock core has a through hole along central axis is prefabricated respectively, and the rock core storehouse is through this through hole and external communications; Wherein the middle part of rock core left side end socket outer wall is processed with external thread; The outer wall of the right end socket of rock core is processed with radially outer shoulder; The right end socket of rock core is stuck in the upper surface of right side wedge shape sheath through this shoulder, and the axially extended shoulder outer wall of right end socket is processed with external thread; Said pressure cap; Comprise left pressure cap and right pressure cap, the cap center of left and right pressure cap is processed with circular hole respectively, and the sidewall of wherein left pressure cap circular hole is processed with internal thread; The thickness of right pressure cap cap equates with the distance that extends axially of right end socket shoulder; Right pressure cap is with after right end socket and cylinder screw are connected, and the right side of right pressure cap and right end socket upwards also is provided with two threaded holes in the footpath of right pressure cap in same plane; Left side pressure cap is threaded with left end socket and cylindrical shell left end, and left pressure cap is extended in the left side of left end socket; This clamper also comprises baffle plate; The main body of this baffle plate is circular; The equal diameters of its diameter and right pressure cap upwards is provided with a threaded hole in the footpath of baffle plate, and one in two threaded holes on this threaded hole and the right pressure cap is connected through screw; On baffle plate, also be processed with crescent-shaped slot, another screw passes this crescent baffle plate is fixed on another threaded hole of right pressure cap.

The beneficial effect of the utility model: the application's product design new rock core sleeve and Sealing Technology, promptly the rock core sleeve has adopted the two ends bell mouth shape, and the supporting taper sheath that is provided with, it is simple and convenient, time saving and energy saving make to change sleeve; Sealing between sleeve and the cylindrical shell also is different from traditional extruding gum cover formula sealing, but on the tapering sheath, designs annular groove, and O type rubber seal is installed, and has realized the sealing between rock core sleeve and the clamper cylindrical shell.Also designed embedded rock core end socket and the fastening core sample of crescent slot type baffle plate in addition, reduced the dead volume of clamper by a relatively large margin, the loading and unloading core sample is simple and convenient.The outward appearance of novel core holding unit is more compact in global design, and structure is exquisite, has overcome the shortcoming of the thick heaviness of original core holding unit.

Description of drawings

Fig. 1 is the front view of the application's clamper.

Fig. 2 is the vertical view of Fig. 1.

Fig. 3 is a baffle plate and structural representation after right pressure cap is connected.

Embodiment

Further is explanation below in conjunction with accompanying drawing to the application:

Combined shown in Figure 2ly by Fig. 1, a kind of new indoor displacement test is used core holding unit, comprises the pressure cap at wedge shape sheath 3, rock core end socket and cylindrical shell 5 two ends of cylindrical shell 5, rock core sleeve 6, rock core sleeve; Said cylindrical shell 5 is the cylindric of stainless steel material, and the two ends of cylindrical shell 5 are processed with external thread respectively, is processed with external pressure hole 51 at the axial centre point place of cylindrical shell 5 outer walls, is welded with above the external pressure hole 51 and the extraneous pipeline that is connected at this, in order to add confined pressure; Said rock core sleeve 6 is the cylindric of rubber material, and the two ends of rock core sleeve 6 are processed as bell mouth shape; The wedge shape sheath 3 of said rock core sleeve; Form by a band of column portion and a conical ring portion; Wherein the loudspeaker oral area of the structure of wedge shape sheath conical ring portion and rock core sleeve 6 is corresponding, and when the conical ring portion of this wedge shape sheath was inserted in the loudspeaker oral area of rock core sleeve, the two sealed contact; Outer wall in wedge shape sheath band of column portion is processed with annular groove along circumference, this annular groove liner O RunddichtringO 4, and the internal diameter of the band of column portion of wedge shape sheath and conical ring portion equates in addition; Rock core sleeve 6 integral body that two ends are inserted with wedge shape sheath 3 are encased in the cylindrical shell 5, press the storehouse at the ring that has surrounded a sealing between cylindrical shell 5 and the rock core sleeve 6, under the effect of wedge shape sheath 3 and O RunddichtringO 4; Said rock core end socket comprises the right end socket 7 of rock core left side end socket 2 and rock core, and the body of the left and right end socket of rock core is column, and the two is inserted in respectively in the left and right wedge shape sheath, and rock core sleeve 6 has surrounded the rock core storehouse with left and right rock core end socket; And the left and right end socket of rock core has a through hole along central axis is prefabricated respectively, with rock core storehouse and external communications; Wherein the middle part of rock core left side end socket 2 outer walls is processed with external thread; Can regulate the degree of depth that left end socket 2 gets into rock core sleeve 6 inside according to the precession degree of this screw thread; The outer wall of the right end socket 7 of rock core is processed with radially outer shoulder; The right end socket 7 of rock core is stuck in the upper surface of right side wedge shape sheath through this shoulder, and right end socket 7 axially extended shoulder outer walls are processed with external thread; Said pressure cap, its effect are in order to push down wedge shape sheath and the rock core end socket of fixing two ends, to comprise left pressure cap 1 and right pressure cap 8; The cap center of left and right pressure cap is processed with circular hole respectively; The sidewall of circular hole is processed with internal thread respectively, and the distance that extends axially of the thickness of its right-of-center in political views's pressure cap 8 caps and right end socket 7 shoulders equates, right pressure cap 8 is with after right end socket 7 and cylindrical shell 5 are threaded; The right side of right pressure cap 8 and right end socket 7 is in same plane; Footpath at right pressure cap 8 upwards also is provided with two threaded holes, and left pressure cap 1 is threaded with left end socket 2 and cylindrical shell 5 left ends, and left pressure cap is extended in the left side of left end socket 2.This clamper also comprises baffle plate 9; Its structure is as shown in Figure 3; The main body of this baffle plate 9 is circular, and the equal diameters of its diameter and right pressure cap 8 upwards is provided with a threaded hole in the footpath of baffle plate 9; One in two threaded holes on this threaded hole and the right pressure cap 8 is connected through screw; On baffle plate 9, also be processed with crescent-shaped slot 91, another screw passes this crescent-shaped slot 91 and baffle plate 9 is fixed on another threaded hole of right pressure cap 8, and the effect of this baffle plate 9 is exactly to guarantee that the right end socket 7 of rock core is fastened in the rock core sleeve 6.

When the loading and unloading core sample, only need the thread looseness between left rock core end socket 2 and the left pressure cap 1 is unloaded left pressure cap 1, push baffle plate 9 aside, can load and unload core sample.

Claims (1)

1. a new indoor displacement test is used core holding unit, comprises cylindrical shell, rock core sleeve, wedge shape sheath and pressure cap; Said cylindrical shell is the cylindric of stainless steel material, and the two ends of cylindrical shell are processed with external thread respectively, is processed with the external pressure hole at the axial centre point place of cylinder body outer wall, is welded with above the external pressure hole and the extraneous pipeline that is connected at this; Said rock core sleeve is the cylindric of rubber material, it is characterized in that: the two ends of rock core sleeve are processed as bell mouth shape; Said wedge shape sheath is made up of a band of column portion and a conical ring portion, and wherein the loudspeaker oral area of the structure of wedge shape sheath conical ring portion and rock core sleeve is corresponding, and when the conical ring portion of this wedge shape sheath was inserted in the loudspeaker oral area of rock core sleeve, the two sealed contact; Outer wall in wedge shape sheath band of column portion is processed with annular groove along circumference, this annular groove liner O RunddichtringO, and the internal diameter of the band of column portion of wedge shape sheath and conical ring portion equates in addition; The rock core sleeve integral body that two ends are inserted with the wedge shape sheath is encased in the cylindrical shell, presses the storehouse at the ring that has surrounded a sealing between cylindrical shell and the rock core sleeve, under the effect of wedge shape sheath and O RunddichtringO; Said rock core end socket comprises the right end socket of rock core left side end socket and rock core, and the body of the left and right end socket of rock core is column, and the two is inserted in respectively in the left and right wedge shape sheath, and rock core sleeve and left and right rock core end socket have surrounded the rock core storehouse; And the left and right end socket of rock core has a through hole along central axis is prefabricated respectively, and the rock core storehouse is through this through hole and external communications; The left-half of rock core left side end socket outer wall is processed with external thread, and the outer wall of the right end socket of rock core is processed with radially outer shoulder, and the right end socket of rock core is stuck in the upper surface of right side wedge shape sheath through this shoulder, and the axially extended shoulder outer wall of right end socket is processed with external thread; Said pressure cap comprises left pressure cap and right pressure cap, and the cap center of left and right pressure cap is processed with circular hole respectively, and the sidewall of wherein left pressure cap circular hole is processed with internal thread, and left pressure cap all is threaded with left end socket and cylindrical shell left end, and left pressure cap is extended in the left side of left end socket; The thickness of right pressure cap cap extends axially apart from equate with right end socket shoulder, and right pressure cap is with after the cylindrical shell right-hand member is threaded, and the right side of right pressure cap and right end socket upwards also is provided with two threaded holes in the footpath of right pressure cap in same plane; This clamper also comprises a baffle plate in addition; The main body of this baffle plate is circular; The equal diameters of its diameter and right pressure cap upwards is provided with a threaded hole in the footpath of baffle plate, and one in two threaded holes on this threaded hole and the right pressure cap is connected through screw; On baffle plate, also be processed with crescent-shaped slot, another screw passes this crescent baffle plate is fixed on another threaded hole of right pressure cap.
CN2011203426173U 2011-09-14 2011-09-14 Novel rock core holder for indoor displacement experiments CN202189003U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011203426173U CN202189003U (en) 2011-09-14 2011-09-14 Novel rock core holder for indoor displacement experiments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011203426173U CN202189003U (en) 2011-09-14 2011-09-14 Novel rock core holder for indoor displacement experiments

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104807958A (en) * 2015-04-02 2015-07-29 中国石油天然气股份有限公司 Triaxial self-positioning core holder
CN107894382A (en) * 2017-10-05 2018-04-10 西南石油大学 A kind of HTHP core holding unit
CN108872043A (en) * 2018-07-06 2018-11-23 中国矿业大学(北京) The three axle clamp holders for three axis non-isothermal multiphase porous flow experimental system of deep soft rock

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104807958A (en) * 2015-04-02 2015-07-29 中国石油天然气股份有限公司 Triaxial self-positioning core holder
CN104807958B (en) * 2015-04-02 2016-07-06 中国石油天然气股份有限公司 A kind of three axial self-align core holding units
CN107894382A (en) * 2017-10-05 2018-04-10 西南石油大学 A kind of HTHP core holding unit
CN108872043A (en) * 2018-07-06 2018-11-23 中国矿业大学(北京) The three axle clamp holders for three axis non-isothermal multiphase porous flow experimental system of deep soft rock

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