CN2262097Y - High temperature oil pipe radiactive logging instrument - Google Patents

Abstract

The utility model is mainly composed of a hanging sleeve (1), a sealing head (2), a magnetic positioner (3), an outer shell (8) of a gamma instrument, a metal thermos bottle, a natural gamma measurement circuit (19), a guiding cone (13), etc. The utility model has the advantages of compact internal structure and connection and small size, with an outer diameter ranging from phi 44 mm to phi 32 mm. The logging instrument can bear pressure force as high as 70MPa, and can work for two hours normally, stably, and reliably when environment temperature is as high as 180 DEG C, with counting error which is less than +/-5 percent. The utility model is an ideal logging instrument which can accurately measure high temperature and low temperature of oil pipes with all dimensions in an oil-gas field and can accurately measure the position of a perforation.

Description

High temperature oil pipe radioactivity logging device

The utility model belongs to the oil pipe logger.

In oil and gas development, before perforation, need to carry out the layering location, measure the perforation position exactly, require error in ± 20 centimetres.If the perforation position finding is inaccurate, will influence the yield of oil gas, sometimes even engineering accident takes place, thereby the accuracy of oil pipe logging instrument is had relatively high expectations.Effective application of and old well production potential tapping technology wide along with the continuous expansion of oil, natural gas exploration context, the target zone of exploitation is more and more darker, thereby the temperature in shaft bottom is more and more higher, and the pressure in shaft bottom is also increasing.Again because perforating job generally adopts is oil tube transmission perforation, and the internal diameter of oil pipe all is tending towards using 2 inches small tubes, this has just limited the outside dimension of oil pipe logging instrument, that is to say and to use the logging instrument of external diameter less than φ 44mm, could in 2 inches oil pipe, carry out the layering location, measure perforation position accurately.At present slim-hole is carried out the employed oil pipe radioactivity logging device of layering location survey before perforation, mainly form by hanging sleeve, seal head, magnetic locator, GR instrument and guide cone, but Yin Naiwen is low, and is withstand voltage not high and can't carry out the layering location survey to the high temperature well and the deep-well of 2 inches oil pipes.As the FYG125 type logging instrument that Xi-an Petroleum Prospecting Instrument Gen. Factory is produced, its external diameter is φ 38mm, and its high ambient temperature can only reach 125 ℃, and can only continuous operation 1 hour, and counting error is less than ± 7%, and the maximum pressure that instrument can bear has only 60Mpa.The FCIC38-155B type logging instrument produced of Chongqing oil instrument plant and for example, external diameter is φ 38mm, the high ambient temperature during work also can only reach 155 ℃, but continuous operation 2 hours, counting error is less than ± 5%, and the maximum pressure that instrument can bear also has only 60Mpa.Measure though they are suitable for the slim-hole of 2 inches oil pipes, all be unwell to and bottom hole temperature (BHT) is higher than the deep-well that 155 ℃ high temperature well and bottom pressure be higher than 60Mpa carries out the layering location survey.

The purpose of this utility model be for oil gas field provides a kind of external diameter little (φ 44mm-φ 32mm), high temperature resistant (high ambient temperature can up to 180 ℃), bears pressure height (withstand voltage up to 70Mpa), the working time long (be 180 ℃ in environment temperature, when operating pressure is 70Mpa, can continuous operation 2 hours), the high temperature oil pipe radioactivity logging device of error little (counting error is less than ± 5%).This logging instrument is applicable to the high and low temperature oil gas well of all size oil pipes in the oil gas field and the bottom pressure layering location survey at 70Mpa and following oil gas well, and can measure the perforation position exactly.

The purpose of this utility model is achieved in that the shell of logging instrument adopts the small-caliber metal tubes of high-intensity performance, and the pressure that can bear the deep-well shaft bottom is up to 70Mpa.Also have additional the metal heat preservation bottle in the shell of Gamma device, the tube wall of metal heat preservation bottle is the double layer of metal light wall pipe, and the centre vacuumizes, and filling with insulation material and thermal radiation resistant material, thereby can be heat insulation effectively; In the metal heat preservation bottle, heat absorbent is housed, the temperature rise speed in the time of effectively slowing down instrument work in the bottle.Whole GR measuring circuit is arranged in the metal heat preservation bottle that can effectively heat insulationly can effectively absorb heat again, measuring circuit is selected resistant to elevated temperatures efficient miniaturized component for use, the loss of circuit is little, calorific value is few, thereby this logging instrument is in environment temperature during up to 180 ℃, can guarantee the normally stable and continuous operation 2 hours reliably of measuring circuit.Because what measuring circuit adopted is that miniaturized component and structure are gathered, fully effectively utilize limited mechanical space, the internal construction of metal heat preservation bottle is also very compact, thus the external diameter of having realized the metal heat preservation bottle less (φ 35mm-φ 23mm).Because the external diameter of metal heat preservation bottle is less, internal construction of this logging instrument and connection are all very compact in addition, thus the external diameter of having realized this logging instrument also less (φ 44mm-φ 32mm).

Fig. 1 is an assembling schematic diagram of the present utility model.Among the figure: (1) is hanging sleeve, and (2) are seal head, and (3) are magnetic locator, (4) be sealing ring, (5) for linking screw thread, (6) are contact pin, and (7) are for compressing copper ring, (8) be the Gamma device shell, (9) be spacer shell, (10) are plug, and (11) are gland, (12) be metal heat preservation bottle tube wall, (13) are guide cone.

Fig. 2 is the structure diagram of metal heat preservation bottle.Among the figure: (10) are plug; (11) be gland, (12) are metal heat preservation bottle tube wall, and (14) are fairlead; (15) be heat absorbent; (16) be pipe in the last absorber, (17) are last absorber outer tube, and (18) are last absorber flange; (19) be the GR measuring circuit; (20) be following absorber flange, (21) are following absorber shell, (22) protective cover.

The utility model is oil pipe radioactivity and magnetic orientation combination logging tool, in oil pipe, measure the gamma total amount and the tubing coupling signal of rock stratum natural radiation along well bore, find layer position accurately for oil-gas mining depth data accurately is provided, simultaneously also can cooperate other logging methods, in production logging, discern oil reservoir.The utility model comprises hanging sleeve (1), seal head (2), magnetic locator (3), sealing ring (4), contact pin (6), compresses copper ring (7), Gamma device shell (8), spacer shell (9), metal heat preservation bottle, GR measuring circuit (19), guide cone (13) as shown in Figure 1 and Figure 2.The metal heat preservation bottle as shown in Figure 2; comprise plug (10), gland (11), metal heat preservation bottle tube wall (12), fairlead (14), heat absorbent (15), go up pipe (16) in the absorber, go up absorber outer tube (17), go up absorber flange (18), absorber flange (20), absorber shell (21), protective cover (22) down down, GR measuring circuit (19) is arranged in the metal heat preservation bottle.Gamma device shell (8) adopts the metal pipe material of high-intensity performance, and its external diameter is φ 44mm-φ 32mm, can bear the pressure up to 70Mpa, is provided with the metal heat preservation bottle in Gamma device shell (8).The metal heat preservation bottle is single-ended opening, and openend makes progress, and blind end is following, near guide cone (13), its external diameter is φ 35mm-φ 23mm, and metal heat preservation bottle tube wall (12) is the double layer of metal light wall pipe, the centre vacuumizes, and stuffed heat insulated and thermal radiation resistant material, can be heat insulation effectively.The upper/lower terminal of placing GR measuring circuit (19) in the metal heat preservation bottle is provided with upper and lower absorber flange (18,20), and also be provided with heat absorbent (15) in the outer end of upper and lower absorber flange, the heat that measuring circuit was sent when heat absorbent can absorb logging instrument work effectively slows down the temperature rise speed in the bottle.GR measuring circuit (19) is arranged on can be effectively heat insulation, in the metal heat preservation bottle that can effectively absorb heat again, the element of GR measuring circuit (19), select resistant to elevated temperatures efficient miniaturized component for use, thereby make the compact conformation of measuring circuit, and the loss when work is little, and its calorific value is just few.All these designs have just guaranteed that this logging instrument is under the situation of 180 ℃ of ring Wen Gaoda, temperature in the metal heat preservation bottle is lower than 90 ℃, thereby guarantee GR measuring circuit (19) can be normal, stable, continuous operation 2 hours reliably, its counting error is less than ± 5%, certainty of measurement is higher.GR measuring circuit (19) is screwed on last absorber flange (18), last absorber and plug (10) are by threaded connection together, bottle mouth position at the metal heat preservation bottle is provided with gland (11), plug (10) is compressed, and the compacted copper ring of metal heat preservation bottle (7) is pressed between spacer shell (9) and the guide cone (13), thereby makes this logging instrument can bear certain vibration and impact.The GR signal that GR measuring circuit (19) records, through fairlead (14) and contact pin (6) output, the magnetic flag of same magnetic locator (3) output together, be connected on three cores (or the seven cores) cable by seal head (2), supply with Ground Processing System, thereby realized GR instrument and combined integratedization of magnetic locator.Magnetic locator (3) is connected by screw thread (5) with Gamma device shell (8), and is provided with sealing ring (4).Hanging sleeve (1) is connected with seal head (2) by screw thread, seal head (2) and magnetic locator (3) are by being threaded and sealing ring being set, guide cone (13) and Gamma device shell (8) be by being threaded and being provided with sealing ring, thereby make this logging instrument non-leakage under 70Mpa pressure.

The utility model compared with the prior art, internal construction and connection are very compact, contour structures is small and exquisite, the external diameter of shell is less, have only φ 44mm-φ 32mm, the intensity height of shell can bear the pressure up to 70Mpa, especially also have additional the metal heat preservation bottle that can effectively heat insulationly can effectively absorb heat again in small and exquisite shell, GR measuring circuit (19) is arranged on again in the small and exquisite metal heat preservation bottle.Therefore, the utility model can be in environment temperature during up to 180 ℃, can be normal, stable, continuous operation 2 hours reliably, counting error is less than ± 5%, certainty of measurement is higher, applicable to the layering location survey of all size oil pipes in the oil gas field, be the desirable logging instrument of measuring the perforation position before high and low temperature oil gas well and the high and low pressure perforating oil gas well exactly.

Claims (3)

1, a kind of high temperature oil pipe radioactivity logging device, by hanging sleeve (1), seal head (2), magnetic locator (3), sealing ring (4), contact pin (6), compress copper ring (7), Gamma device shell (8), spacer shell (9), GR measuring circuit (19), guide cone (13) and form, it is characterized in that metal heat preservation bottle in addition; The external diameter of logging instrument is φ 44mm～φ 32mm.

2, logging instrument according to claim 1 is characterized in that GR measuring circuit (19) is arranged in the metal heat preservation bottle.

3, logging instrument according to claim 1, the external diameter that it is characterized in that the metal heat preservation bottle are φ 35mm～φ 23mm; Metal heat preservation bottle tube wall (12) is the double layer of metal light wall pipe, and the centre vacuumizes and stuffed heat insulated and thermal radiation resistant material; The upper/lower terminal of placing GR measuring circuit (19) in the metal heat preservation bottle is provided with upper and lower absorber flange (18,20), and also is provided with heat absorbent (15) in the outer end of upper and lower absorber flange.