The connection rods
The invention relates to mining, namely, drilling rods, used for drilling bore-holes and wells. In connection rods, in which the drill rods do with the possibility of twisting one another, each of the rods has three boarding plot: a threaded, tapered Sanatornaya and cone nasmotrevshayasya, with the sequence of their location along the axis of the drill rod from the screw to the cone nasmotrevshayasya through cone somatropina. The dimensions of the parcel pick up so that the contact parts in cone nesamotsenna section occurs after the flexible circuit cone senatorsanders area. The invention provides for the elimination of conditions leading to congestion in some areas of the connection. 1 Il. The invention relates to mining, and more particularly to drilling rods, used for drilling bore-holes and wells.Known threaded connection rods ( page 243, Fig.VIII.8.a, b, C). The disadvantage of these compounds is the possibility of excessive tightening of the threads, causing them to cut, especially as the load on the coils of threads cannot be distributed evenly, and it overloads the individual widgenie connection rods ( page 258, Fig.VIII.16.a) they are made with angles of taper(2°30'...3°30') ( p. 266, seventh line from the bottom). The disadvantages of such compounds is the following possible breakage of the parts when pressing and the need for very large effort to repressive, which often technically impossible to implement in mines (see  page 257, first paragraph).Closest to the claimed relates taper-threaded connection ( page 245, Fig. VIII.9.b) adopted for the prototype. In this case, the torque is transmitted from one rod to another, due to the fact that each bar contains two sections of the connection - threaded and tapered. When this tapered section is taken nasmotrevshihsya and its presence, firstly, prevents excessive tightening of the threaded section, a second, partially allows to transmit torque through the tapered connection and, thirdly, the centers of the rods relative to each other.However, this compound also has a significant disadvantage in that nasmotrevshayasya the tapered section may not transmit significant torque and therefore the threaded section is overloaded, and if provided with a tapered section amatormassiga, inevitably, jamming it art is the elimination of the disadvantages of the prototype, i.e., the elimination of conditions leading to congestion in some areas of the connection.The basis for solving the technical problem based on the idea used in conjunction with a threaded section of two types of cone connection - senatorsanders and nicotinamidase. Under amatormassiga cone zanimaetsya a cone with a cone angle <4°, and under nasmotrevshihsya - angle taper >12° ( page 266, line 11, and further below). It is important for this site to arrange along the axis of the connection sequence - threaded, tapered Sanatornaya and cone nasmotrevshayasya.The solution is achieved by the connecting rods, made with threaded and tapered sections, drill rods do with the possibility of twisting one another. Each of the rods has three boarding plot: a threaded, tapered Sanatornaya and cone nasmotrevshayasya, with the sequence of their location along the axis of the drill rod from the screw to the cone nasmotrevshayasya through cone Sanatornaya, and size of areas to pick so that the contact parts in cone nesamotsenna section occurs after the flexible circuit cone senatorsanders of uchastka rod; OO - geometric axis of the connection, coinciding with the axis of the rod; 1’- nasmotrevshayasya tapered section; 1" - Sanatornaya tapered section; 1"' - threaded plot;- the angle of the taper section 1',>12;- the angle of the taper section 1",<4.Works connection as follows.The rod 1 is entered in the forestay 2, twist on the screw section 1’" to contact the tapered senatorsanders plot 1".Upon further screwing in of the elastic deformation occurs in the contact zone senatorsanders plot and axial displacement of the parts (see  page 263, 5-th line of the above formula (VIII.27) and Fig.VIII.27), which provides the appearance of contact on nesamotsenna site 1'. Thus, there is initially contact the threaded section, then tapered effect plot and after the elastic deformation of the conical section nicotinamidase. That is, the sizes of the plots are selected in advance so that the contact parts in cone nesamotsenna site 1' occurs only after the flexible circuit in the cone senatorsanders site.When proishodit distribution points for all sites what prevents them from overload.The disconnect is quite easy due to the fact that section 1"' provides rods relative rotational-translational motion, leading to ejection and separation of the rods.The source of information1. Alimov O. D., Janitorial L. T. Drill machine. M: mechanical engineering, 1976, S. 295.
ClaimsThe connection of drill rods, in which the drill rods are made with threaded and tapered sections, characterized in that the drill rods do with the possibility of twisting one another, each of the rods has three boarding plot: a threaded, tapered Sanatornaya and cone nasmotrevshayasya, with the sequence of their location along the axis of the drill rod from the screw to the cone not Sanatornaya through cone Sanatornaya, and size of areas to pick so that the contact parts in cone nesamotsenna section occurs after the flexible circuit cone senatorsanders area.
FIELD: mining industry.
SUBSTANCE: connection and element include at least one mostly cylindrical outer thread and respectively mostly cylindrical inner thread. Outer thread is made at pipe portion, making up a solid whole with component of drilling bars. Threads include side edges and recesses placed between them. Recesses of cylindrical outer thread are placed mostly at a distance from appropriate vertexes of cylindrical inner thread, one of portions with decreased cross-section is partially composed of layer of material with higher electrode potential, than that of steel, made of nickel, chrome, tin, cobalt, titan or alloys thereof.
EFFECT: higher efficiency.
2 cl, 6 dwg, 1 ex
FIELD: mining industry.
SUBSTANCE: device has bushing and sleeve with inner conical thread on free end connected to the latter, and nipple with outer conical thread at free end, connected to bushing. Thread is made special locking with step p=(10..12) mm, with profile angle α=40°..70° with profile height h=(7..12) mm, while diameter of greater cone base dp is connected to outer diameter of bar D by relation D≥1.05dp with values of D from 63 mm to 245 mm, and inner diameter of bar d is connected to diameter of greater base of cone by relation d≤(0.8..0.9)dp. On outer surface of bar close to each of its ends two couples of mutually perpendicular flats are made.
EFFECT: higher efficiency.
3 cl, 3 dwg
FIELD: metallurgy and mechanical engineering.
SUBSTANCE: the invention is pertaining to the field of metallurgy and mechanical engineering, in particular, to development of the corrosion-resistant steel for percussion boring with improved properties concerning resistance to the corrosive fatigue. These properties are realized in the in the elongated member for the percussion boring, which has a threading and a flushing channel. The corrosion-resistant steel used for production of the boring equipment has the martensite structure with the share of the martensite from more than 50 and up to less than 100 mass % and contains Cr ≥11÷ mass % and 0.1 mass % ≤ C + N 0.8 mass %. The steel may additionally contain Mo ≤5 mass %, W ≤5 mass % and Cu ≤ 2 mass %. The composition of the steel meets the value of the index of the equivalent of resistance to a pitting corrosion (ERPC) > 10, determined according to the formula: ERPC = Cr + 3.3 (Mo + W) + 16 N, where Cr, Mo, W and N correspond to the contents of the indicated elements (in mass percents). The content of the martensite in the steel makes from 75 up to 98 mass %. The standard service life of the drill rods used for the core drilling at boring a rock - mainly from granite has increased up to 2189÷3299 drilled meters.
EFFECT: the invention ensures significantly increased standard service life of the drill rods used for the core drilling at boring a rock - mainly from granite(in drilled meters).
8 cl, 2 dwg, 1 ex
FIELD: oil and gas well forming.
SUBSTANCE: joint includes male and female tubular members with conical or cylindrical threads and thrust ends, outer and inner sealing surfaces. Inner surface of female member has conical part made as a chamfer and is terminal thread section. The end is of conical shape and tilts towards outer surface of female member relative vertical plane extending across female member axis. The conical surface mate to that of male member end and has area of transition from complete thread area to inner conical sealing surface having apex on female member axis. Transition part connected to complete thread area is cylindrical and has diameter exceeding that of thread or as a groove with triangular cross-section. One groove wall is terminal thread section. Another embodiment of the joint is also disclosed. Method for forming threaded joint adapted to connect hydraulic pressure tested oil field pipes having union nipple ends involves machining union nipple ends by cutting sealing end, turning outer conical sealing surface and outer tube surface for thread forming; cutting the thread; boring pipe to obtain fixed inner pipe diameter. One pipe end is heated by induction heating device up to t=950-980°C and upsetting tools are heated up to t≈250°C. Before upsetting the tools are lubricated with mixture containing graphite and axle oil taken with ratio of 1:8. Then heated swage and matrix perform combined upsetting of above end from inner and outer pipe surfaces. After the upsetting end plug is inserted in pipe from end to be further processed and upset surfaces are grinded for following machining. The machining process additionally includes turning thrust ledge and outer chamfer. Depression made in the form of groove with diameter less than thread diameter is formed at thrust end of union nipple. Another variant of threaded joint forming method is also disclosed.
EFFECT: increased reliability and air-tightness, improved testability and joint strength during assembling-disassembling and operation thereof.
4 cl, 16 dwg
FIELD: mining industry, particularly for oil and gas extraction from underground formation, namely to join drill pipe sections with the use of strut included in threaded pipe connection.
SUBSTANCE: metal item forming method involves mechanical deforming metal strip, for instance slotted strut formed of alloy selected from group containing Cu/Be, Cu/Sn, Cu/Ni, Cu/Ni/Sn, Cu/Zn, Cu/Si, Ni/Cr, Cu/Al, Al/Ti, Al/Mg, Al/Zn to obtain formed blank including hollow section made as truncated cone without helical slot; mechanical deforming conical section to form helical slit in it.
EFFECT: prevention of plastic threaded connection deformation, increased reliability of drill pipe connection, simplified strut production technology.
34 cl, 9 dwg
FIELD: oil industry, particularly to connect casing pipes or production strings.
SUBSTANCE: connection comprises pipes with outer cylindrical thread arranged at ends thereof, coupler with inner thread and sealing means. Pipes are provided with screw grooves located beyond the thread and having pitch equal to thread pitch. Coupler comprises shoulder extending from center of inner surface thereof and with inner cylindrical surfaces abutting the shoulder. Coupler also has ring-like or left-handed screw grooves having diameters exceeding cylindrical thread diameter. Ring-like or screw grooves are located on inner surface between thread and coupler ends. Sealing means is made as resilient rings and resilient bushes. Resilient rings are installed at coupler shoulder on inner cylindrical surfaces and may contact with end surfaces of the pipes. Resilient bushes are installed on ring-like or screw grooves of the coupler and may contact with screw grooves of the pipes.
EFFECT: increased corrosion resistance of thread exposed to well fluid.
FIELD: mining, particularly coupling means to connect casing pipes or tubing strings in oil and gas wells.
SUBSTANCE: coupling to connect pipes provided with tapered threads at ends thereof comprises clutch with cylindrical recess and elastic bush. Inner bush surface may cooperate with tapered thread run-out and with outer pipe surface. Outer bush surface may cooperate with cylindrical recess surface of the clutch. Metal ring is installed in joint at clutch end. The inner metal ring surface is provided with bead adapted to engage elastic bush arranged in the metal ring. Outer bush surface may cooperate with inner surface of metal ring after pipe and clutch screwing together. The bush is installed to provide cylindrical clutch groove filling.
EFFECT: prevention of sealing lubricant forcing-out, increased coupling protection against corrosive medium and electrochemical corrosion, increased reliability of well operation and reduced material consumption.
FIELD: threaded connection for percussion drilling on ledge rock.
SUBSTANCE: connection is made between drill rod and bushing, connected to drilling bit. Drill rod on one end has external thread, and on other end - first external surface of constant diameter, and also second external surface, positioned in axial direction between first external surface and thread. Bushing is made with internal thread and has internal end stop surface and second circular end surface. Between second end surface and internal thread, cylindrical internal surface is positioned. Second end surface of bushing is positioned in axial direction behind the end of external thread or behind a gap in thread. Internal diameter of bushing is equal to diameter of second external surface of drill rod and is less than diameter of first surface of rod. First imaginary cylinder, formed by continuation of internal surface of bushing, intersects with drill rod. Second imaginary cylinder, formed by continuation of external surface of bushing, passes outside the drill rod.
EFFECT: decreased generation of vortices during percussion drilling due to minimization of difference of dimensions between drill rod and drilling bit.
6 cl, 4 dwg
FIELD: oil and gas well construction, particularly threaded couplings and joints between rod and bit, or between rod and rod.
SUBSTANCE: air-tight threaded connection includes male and female pipes with conical threading and conical seat surfaces. The first conical surfaces cooperate with each other and are correspondingly made on outer surface of female pipe end as conical surface oblique along pipe axis and on inner surface of female pipe between conical threading and pipe body. The second conical surfaces are created on male pipe as end conical surface with oblique angle defined in pipe axis and mating end conical surface made on female pipe in transition pipe section between the first conical surface and the pipe body. Conical threading has 1:16 obliquity. Conical seat surfaces formed on outer surface of male pipe end and on inner surface of female pipe end have 1:10 obliquity in pipe axis direction. Conical end surfaces have 15° angle of taper in direction of conical threading made in corresponding pipe. Annular groove for oil forcing is made in female pipe in transition section between conical threading and pipe body. Conical Battress-type threading having 13° threading angle has threads with cross-section defining unequal-sided trapeze. Support edge of each thread extends at increased angle to load application direction.
EFFECT: increased efficiency.
FIELD: mining, particularly percussion rock drilling.
SUBSTANCE: male drill rod section has areas with decreased cross-sections, thread for percussion rock drilling having end and formed at male section end. Male section end has joining surface to transmit shock waves. Male section comprises the first cross-sectional area defined in zone of full thread profile and the second cross-sectional area located directly beyond the thread end. The second cross-sectional area exceeds the first one. Area length is defined as length of cylinder beginning from impact surface plane. Cylinder diameter is equal to outer thread diameter. Ratio between length and outer thread diameter is within 1 - 2. Drill bit and threaded connection between male drill rod section and drill bit are also disclosed.
EFFECT: increased fatigue resistance in area having decreased cross-section and at drill member thread bottoms.
8 cl, 8 dwg