A structure for building external gas path for logging

Abstract

The present invention relates to the field of drying and anti-blocking equipment for logging gas and liquid circuits, and specifically to an anti-blocking device and a structure for building an external gas circuit for logging. An anti-blocking device comprises an anti-blocking device tube body and end caps sealed at both ends of the anti-blocking device tube body, a condensing ball is contained in the anti-blocking device tube body, and an upper port and a lower port connected to the outside are respectively provided on the two end caps, an elastic support member is provided between the condensing ball and the lower port, and a space for gas and liquid circulation is left between the elastic support member and the lower port and the anti-blocking device tube body; an external gas circuit structure for logging comprises an anti-blocking device, a dryer and an external condensing ball, and the external condensing ball is connected between the anti-blocking device and the dryer. The present invention has the beneficial effects of eliminating the limitation of the defect that the condensing ball is easily blocked when moving up and down, shortening the connection distance between the anti-blocking device and the dryer, and preventing low-temperature freezing.

Description

Technical Field

[0001] The invention relates to the field of well logging gas-liquid path drying and anti-blocking equipment, in particular to a well logging external gas path building structure. Background Art

[0002] At the oil and gas exploration site, the discovery of oil and gas indications relies on the analysis of rock cuttings fluorescence and the analysis of the gas in the formation contained in the drilling fluid. In actual drilling, the gas that escapes after the drilling fluid is stirred by the electric continuous degasser, float degasser, quantitative degasser or other types of degassers of comprehensive logging needs to pass through two gas-liquid separation and drying devices, namely, the anti-blocking device (gas-liquid separator) and the calcium chloride dryer. The anti-blocking device and the dryer are connected by a colloid hose. During use, the gas-liquid inlet of the anti-blocking device is easily blocked by the adsorbed gas-liquid impurities. At the same time, since the dryer and the anti-blocking device are connected by a long colloid hose, the gas retention space area is increased and the hose is easily deformed, resulting in gas path blockage. Moreover, the water in the gas will freeze at the freezing point temperature and cause freezing blockage. The innovatively designed "logging external gas path construction structure" has achieved good practical results in the actual application of multiple oil and gas exploration sites. It greatly reduces the probability of gas path blockage, ensures the continuous discovery of oil and gas indications, and improves the oil and gas evaluation effect based on the comprehensive logging parameter display.

[0003] For a long time, during the comprehensive logging construction in the process of oil and gas exploration, anti-blocking devices and dryers are generally used to achieve the purpose of gas-liquid separation and gas dehumidification and drying. The anti-blocking device and the drying tube are the same transparent PVC tube with the same diameter. The suspended condensation ball in the anti-blocking device plays the role of gas-liquid separation. The suspension force comes from the suction force of the sample gas suction pump, which utilizes the principle of metal heat conduction cooling; the drying tube is filled with anhydrous calcium chloride to absorb moisture. This anti-blocking device and drying tube have a simple structure, low cost and easy use. However, during use, the structural design in the anti-blocking device is easily blocked by the adsorbed gas and liquid impurities, and the condensation ball is easily blocked by the purpose of preventing drilling fluid suction by the condensation ball with a suspended design. Since the dryer and the anti-blocking device are connected by a long rubber hose, the gas retention space area is increased and the hose is easy to deform, resulting in gas path blockage. Moreover, it is very easy to freeze at freezing temperature, affecting the continuity, stability and timeliness of comprehensive logging gas monitoring. Its disadvantages can be summarized as follows.

[0004] ①The structural design of the anti-blocking device is easily restricted by the defects of the condensation ball moving up and down, resulting in a small adsorption space and easy blockage;

[0005] ② The anti-drilling fluid clogging design of the gas outlet of the anti-clogging device is limited by the defects of the mechanical action principle, which causes the drilling fluid to adsorb and stick and cause clogging;

[0006] ③ The influence of the gravity of the suspended condensation ball itself causes the air path adsorption resistance and leads to unstable adsorption airflow;

[0007] ④ The dryer and the anti-blocking device are connected by a long rubber hose, which increases the retention space of the gas. The hose is easy to deform and cause the gas path adsorption obstruction;

[0008] ⑤ The water in the cavity of the rubber hose increases the air path adsorption resistance, and the water is easy to freeze at freezing temperature, causing air path blockage;

[0009] ⑥ The anti-blocking mechanism of the condensation ball in the anti-blocking device is unscientific, causing gas path blockage;

[0010] ⑦ The gas entering the dryer contains more water, which causes the desiccant in the dryer to fail faster and form agglomerates, causing the gas path to be blocked again;

[0011] ⑧ Without heating measures, the gas line is prone to freezing and blockage in winter. Summary of the invention

[0012] The present invention aims at the deficiencies in the prior art and provides a logging external gas path construction structure.

[0013] The technical solution is as follows:

[0014] An anti-blocking device comprises an anti-blocking device tube body and end covers sealed at both ends of the anti-blocking device tube body, a condensation ball is accommodated in the anti-blocking device tube body, an upper port and a lower port connected to the outside are respectively provided on the two end covers, an elastic support member is provided between the condensation ball and the lower port, and a space for gas-liquid circulation is left between the elastic support member, the lower port and the anti-blocking device tube body.

[0015] A logging external gas path construction structure comprises the above-mentioned anti-blocking device, a dryer and an external condensing ball, wherein the external condensing ball is connected between the anti-blocking device and the dryer.

[0016] Furthermore, it includes an outer tube and an inner tube, the inner tube is provided with a lifting handle, the outer tube is longitudinally provided with a slot for accommodating the operation of the lifting handle, the inner tube is slidably sleeved in the outer tube, and the outer tube and the inner tube are provided with corresponding positioning pin holes.

[0017] Furthermore, it also includes a flexible heating device, which is wrapped around the outer wall of the anti-blocking device, the dryer, and the external condensation ball.

[0018] Furthermore, it also includes a flexible heating device, which is covered on one or more parts of the outer wall or inner wall of the inner tube, the edge of the notch, and the inner wall of the outer tube.

[0019] Furthermore, the flexible heating device comprises an electric heating wire or tube.

[0020] Furthermore, the flexible heating device comprises an electric heating wire or tube.

[0021] Furthermore, it also includes a base, on which a through hole connected to the outer tube is opened, and the outer tube is detachably erected above the base, and a space is reserved below the base for accommodating gas and liquid pipelines to pass through the through hole.

[0022] Furthermore, the base is in an inverted U shape.

[0023] Furthermore, the through hole is fixedly connected to a first threaded tube, the lower end of the outer tube is fixedly connected to a second threaded tube, and the first threaded tube and the second threaded tube are threadably matched.

[0024] Furthermore, the outer tube is fixedly provided with a rotating handle.

[0025] The beneficial effects of the present invention are:

[0026] ①The structural design inside the anti-blocking device eliminates the limitation of the condensation ball being easily blocked when it moves up and down, and will not be blocked due to the small adsorption space;

[0027] ② The anti-drilling fluid blockage design of the gas outlet of the anti-blockage device has been optimized, thereby reducing the probability of blockage caused by the adsorption and viscosity of the drilling fluid;

[0028] ③ It overcomes the problem that the suspended condensation ball falls without limit due to its own gravity, reduces the air path adsorption resistance, and stabilizes the adsorption airflow;

[0029] ④ An external condensation ball is added between the anti-blocking device and the drying tube to normalize the adsorption gas path and reduce the probability of blockage;

[0030] ⑤ From top to bottom, the anti-blocking device, external condensing ball and drying tube are distributed vertically, which standardizes the safety standards of the equipment;

[0031] ⑥The overall casing is telescopic, which makes it adjustable in height and rotatable at all angles, meeting the requirements of different installation conditions;

[0032] ⑦The installation base is detachable and the installation position can be adjusted on site, thus avoiding the disadvantages of one-time welding operation;

[0033] ⑧The outer tube can be heated separately, eliminating the possibility of gas path blockage in winter;

[0034] ⑨ The inner tube can be heated separately, eliminating the possibility of gas blockage in winter, and with the adjustment of height and simultaneous heating of the outer tube, the probability of gas blockage is further reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the external gas path construction structure of the mud logging in the third and fourth embodiments;

[0036] Figure 2 It is a schematic diagram of the anti-blocking device structure;

[0037] Figure 3 is a structural schematic diagram of Embodiment 2;

[0038] In the figure: 1 base, 2 fixing screws, 3 clamping plate, 4 first threaded tube, 5 second threaded tube, 6 back cap, 7 back cap rotating handle, 8 disc seat, 9 outer tube, 10 rotating handle, 11 anti-blocking device tube body, 12 external condensing ball, 13 fixing card, 14 drying tube, 15, outer tube heating belt inlet tube, 16, outer tube heating belt outlet tube, 17 notch, 18 inner tube, 19 inner tube heating belt inlet tube, 20 inner tube heating belt outlet tube, 21 lifting handle, 22 lead ring, 23 built-in condensing ball, 24 spring, 25 screw cap, 26 pipeline plug, 27 desiccant, 28 outer tube fixing hole, 29 inner tube fixing hole, 30 electric heating belt or tube, 111 upper end cover, 112 lower end cover, 113 upper through hole, 114 lower through hole. DETAILED DESCRIPTION

[0039] Embodiment 1:

[0040] See also Figure 2 , an anti-blocking device, including an anti-blocking device tube body 11 and end caps sealed at both ends of the anti-blocking device tube body. The anti-blocking device tube body 11 is a PVC transparent tube with an outer diameter of 40mm×wall thickness of 5mm×length of 200mm, and the end caps include an upper end cap and a lower end cap. A condensation ball is installed in the anti-blocking device tube body, and the condensation ball is a built-in condensation ball 23 in the anti-blocking device. The upper and lower end caps are respectively provided with an upper port 113 and a lower port 114 connected to the outside, and a spring 24 is placed between the condensation ball and the lower port 114. The condensation ball can be lifted by the spring 24 to prevent it from falling and blocking the lower port 114, and a space for gas and liquid circulation is left between the spring 24 and the lower port 114 and the anti-blocking device tube body 11.

[0041] Embodiment 2:

[0042] See also Figure 3 A logging external gas path construction structure includes the above-mentioned anti-blocking device, and also includes a dryer and an external condensing ball 12, the external condensing ball 12 is connected between the anti-blocking device and the dryer, and also includes an outer tube 9 and an inner tube 18, the inner tube 18 is provided with a lifting handle 21, the outer tube 9 is longitudinally provided with a notch 17 for accommodating the operation of the lifting handle 21, the inner tube 18 is slidably sleeved in the outer tube 9, and the outer tube 9 and the inner tube 18 are provided with corresponding positioning pin holes, and also includes a flexible heating device, the flexible heating device is wrapped on the outer wall of the anti-blocking device, the dryer, and the external condensing ball 12, or is covered on the outer wall or inner wall of the inner tube 18, the edge of the notch 17, and one or more parts of the inner wall of the outer tube 9, and the flexible heating device includes an electric heating wire or tube.

[0043] Embodiment three:

[0044] See also Figure 1 A logging external gas path construction structure also includes a base 1, a through hole connected to an outer tube 9 is opened on the base 1, the outer tube 9 is detachably erected above the base 1, and a space is reserved below the base 1 to accommodate gas and liquid pipelines passing through the through hole. The base 1 is in an inverted U shape, and a first threaded tube 4 is fixedly connected to the through hole, and a second threaded tube 5 is fixedly connected to the lower end of the outer tube 9. The first threaded tube 4 and the second threaded tube 5 are threadedly matched, and the outer tube 9 is fixedly provided with a rotating handle.

[0045] Embodiment 4:

[0046] See also Figure 1 A logging external gas path construction structure includes a base 1, an outer tube 9, an inner tube 18, an anti-blocking device, a dryer, an external condensing ball 12, and an electric heating device. The outer tube 9, the inner tube 18, the anti-blocking device, the dryer, and the external condensing ball 12 are made of steel.

[0047] The base 1 is in an inverted U shape, including two supporting vertical plates and a supporting horizontal plate. Both the vertical plates and the horizontal plates are steel clamping plates 3 with a size of 100mm×70mm wide×10mm thick. The vertical plates and the horizontal plates can be welded or formed in one piece. ① Fixing screws 2. Two threaded holes with a center hole spacing of 50mm and a hole diameter of 10mm are opened on one of the vertical plates. The long rod fixing screw 2 is screwed into the threaded holes and the other vertical rod forms a clamping fit to stabilize the base 1 on the clamping object; ② The first threaded tube 4. A first threaded tube 4 with an inner diameter of 50mm×5mm wall thickness×50mm high and an inner thread is welded in the center of the crossbeam of the base 1, and the second threaded tube 5 is screwed into the first threaded tube 4. The second threaded tube 5 is located at the bottom of the outer tube 9.

[0048] The outer tube 9 is a round steel tube, 750mm high × 50mm inner diameter × 5mm wall thickness. The outer tube 9 has a width of 20mm × 750mm long from top to bottom. A disc seat 8 with a diameter of 70mm × 5mm thickness is welded in the center of the bottom of the outer tube 9. A second threaded tube 5 with an outer thread is welded in the center of the bottom of the disc seat 8. The outer thread diameter of the second threaded tube 5 is 50mm × 60mm high × 5mm wall thickness. The second threaded tube 5 is screwed with a back cap 6. ① Back cap 6. The back cap 6 is screwed on the second threaded tube 5. The inner thread diameter of the back cap 6 is 50mm × 5mm wall thickness × 20mm width. A steel column with a diameter of 15mm × 100mm length is welded in the center of both sides of the back cap 6, which is used as a back cap rotating handle 7. When the second threaded tube 5 is screwed into the first threaded tube 4, the back cap rotating handle 7 is rotated to lock the second threaded tube 5 and the first threaded tube 4. Rotating in the opposite direction will release it, so that the rotation angle of the outer tube 9 can be adjusted; ② Rotating handle 10. At 100mm from the bottom of the outer tube 9, two semicircular rotating handles 10 are welded in the center of both sides of the notch 17, that is, a solid circular ring with an inner diameter of 100mm and an outer diameter of 110mm is cut in half and welded on both sides of the outer tube 9, so that the outer tube 9 can be rotated by hand; ③ Notch 17. The vertical grooves on the outer tube 9 are used for the up and down movement operation of the inner tube 18, and at the same time, they also provide a sliding path for the drying tube 14, the anti-blocking device, the external condensation ball 12, the lifting handle 21, etc.; ④ The inlet / outlet pipe of the heating belt of the outer tube 9. Two steel pipes with a height of 750mm, an inner diameter of 10mm, and a wall thickness of 2.5mm are vertically welded on both sides of the notch 17 of the outer tube 9, which are used as the inlet pipe 15 and the outlet pipe 16 of the outer tube heating belt respectively, and the electric heating belt or pipe is inserted in and out of them to heat the outer tube 9. Loosen the back cap 6, turn the back cap rotating handle 7, and the outer tube 9 and the inner tube 18 can rotate at the same time; ⑤ Fixing hole. On both sides of the outer wall of the outer tube 9, that is, in the center of both sides of the notch 17, opposite fixing holes with a diameter of 8 mm are opened from bottom to top starting from 50 mm from the bottom of the outer tube 9, with a center hole spacing of 80 mm, for fixing the inner and outer tubes with pins.

[0049] The inner tube 18 is 850mm high × 50mm outer diameter × 2.5mm wall thickness, and the inner tube 18 is sleeved inside the outer tube 9. On the inner tube 18, corresponding to the notch 17 of the outer tube 9, a lifting handle 21, an anti-blocking device, an external condensing ball 12, a drying tube 14, a lead ring and an inner tube 18 heating belt inlet / outlet pipe are longitudinally arranged. ① Lifting handle 21. The lifting handle 21 is a hexagonal column with a diagonal diameter of 12mm × 100mm long. The lifting handle 21 is welded at a position 100mm from the bottom; ② Anti-blocking device. The anti-blocking device is a PVC transparent tube with an outer diameter of 40mm × 5mm wall thickness × 200mm length, with end caps at the top and bottom, and a through hole in the center of the end cap, and a pipeline plug is above the through hole.

[0050] A spring is placed inside the anti-blocking device tube, and a condensation ball is placed on top of the spring. The condensation ball is a built-in condensation ball 23 inside the anti-blocking device. The condensation ball can be lifted up by the spring to prevent it from falling and blocking the bottom end cover opening. Two fixing clips 13 are welded on the inner tube 18 corresponding to the position of the anti-blocking device, and the anti-blocking device is pushed in to fix it to prevent it from falling and to position it; ③ External condensation ball 12. A hose line is led out from the top end cover of the anti-blocking device, connected to the external condensation ball 12, and the hose line led out from the bottom is connected to the gas and liquid source.

[0051] The external condensing ball 12 is a hollow steel ball with an outer diameter of 60mm and a wall thickness of 1mm. There are through holes with a diameter of 8mm at the top and bottom ends. A section of steel pipe is welded to the through hole, and a hose is used to connect the anti-blocking device and the drying tube 14; ④ Drying tube 14. The drying tube 14 is a PVC transparent tube with an outer diameter of 40mm, a wall thickness of 5mm, and a length of 200mm. There are end caps at the top and bottom. There is a through hole in the center of the end cap, and there is a pipeline plug above the through hole. Desiccant is placed in the drying tube 14. Two fixing cards 13 are welded on the inner tube 18 corresponding to the position of the drying tube 14, and the drying tube 14 is pushed in and fixed to prevent it from falling and to position it. The hose line led out from the top end cap of the drying tube 14 passes through a lead ring to go out; ⑤ The inner tube 18 is heated with an inlet / outlet pipe. Two steel pipes with a height of 800 mm, an inner diameter of 10 mm, and a wall thickness of 2.5 mm are welded opposite to each other on the inner wall of the inner pipe 18. The top end is flush with the top of the inner pipe 18, and the bottom end is 50 mm away from the bottom of the inner pipe 18. They are used as the inner pipe heating belt inlet pipe 19 and the inner pipe heating belt outlet pipe 20 respectively. The electric heating belt or pipe passes through them to heat the inner pipe 18. ⑥ Fixing hole. On both sides of the outer wall of the inner pipe 18, i.e., in the middle of the two sides corresponding to the notch 17 of the outer pipe 9, an opposite fixing hole with a diameter of 8 mm is opened from the bottom 100 mm, which is used to fix the inner and outer pipes with pins to achieve height positioning.

[0052] The present invention adopts a method of movable fixing of the base, and the inner and outer tubes are sleeved and extended to realize dynamic adjustable height adjustment; the method of the inner and outer tubes passing through the heating belt to heat can respectively heat the outer tube with a fixed height and the inner tube with an adjustable height in parts, and at the same time, when the inner and outer tubes are completely sleeved, the inner and outer tubes can be heated centrally to prevent the freezing of gas and liquid passing through the anti-blocking device, the external condensing ball and the drying tube in winter; the gas and liquid can be effectively separated by the condensation effect of the built-in condensing ball of the anti-blocking device and the external condensing ball, so that the gas-liquid mixture entering the drying tube is relatively dry.

[0053] The anti-blocking device, external condensation ball, drying tube and lead ring on the inner tube realize vertical height change under the up and down movement of the lifting handle, and the gas and liquid themselves are also effectively separated under the vertical action.

Claims

1. A logging external gas path construction structure, characterized in that: It includes an anti-blocking device, a dryer and an external condensing ball, wherein the external condensing ball is connected between the anti-blocking device and the dryer; The anti-blocking device comprises an anti-blocking device tube body and end caps sealed at both ends of the anti-blocking device tube body, a condensation ball is contained in the anti-blocking device tube body, and an upper opening and a lower opening communicating with the outside are respectively provided on the two end caps, characterized in that an elastic support is provided between the condensation ball and the lower opening, and a space for gas-liquid circulation is left between the elastic support, the lower opening and the anti-blocking device tube body; It also includes an outer tube and an inner tube, the inner tube is slidably sleeved in the outer tube, and the dryer, the anti-blocking device and the external condensing ball are sequentially arranged and connected along the axial direction of the inner tube; The dryer includes a drying tube, and a fixing card is welded on the inner tube corresponding to the position of the drying tube, and the drying tube is pushed in and fixed; A fixing clip is welded on the inner tube at the position corresponding to the anti-blocking device, and the anti-blocking device is pushed in and fixed; The external condensing ball is a hollow ball with connected through holes formed at both ends, and the through holes are respectively connected to the anti-blocking device and the drying tube; The outer tube is longitudinally provided with a notch, and the notch is configured to provide a sliding path for the drying tube, the anti-blocking device and the external condensing ball during the axial movement of the inner tube relative to the outer tube; It also includes a flexible heating device, which is covered on one or more positions of the outer wall or inner wall of the inner tube, the edge of the notch, and the inner wall of the outer tube.

2. A logging external gas path construction structure according to claim 1, characterized in that: A lifting handle is provided on the inner tube, and the notch is configured to accommodate the operation of the lifting handle. The outer tube and the inner tube are provided with corresponding positioning pin holes.

3. The external gas path construction structure for logging according to claim 1, characterized in that: The flexible heating device comprises an electric heating wire or tube.

4. A logging external gas path construction structure according to any one of claims 1 to 3, characterized in that: It also includes a base, which is provided with a through hole connected to the outer tube. The outer tube is detachably erected above the base, and a space is reserved below the base for accommodating gas and liquid pipelines to pass through the through hole.

5. A logging external gas path construction structure according to claim 4, characterized in that: The base is in an inverted U shape.

6. A logging external gas path construction structure according to claim 5, characterized in that: The through hole is fixedly connected with a first threaded tube, the lower end of the outer tube is fixedly connected with a second threaded tube, and the first threaded tube and the second threaded tube are threadably matched.

7. A logging external gas path construction structure according to claim 6, characterized in that: The outer tube is fixedly provided with a rotating handle.

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