33results about How to "Avoid Drilling Accidents" patented technology

The invention relates to an in-situ observation tester simulating a sand cleaning process in drilling, comprising a bottom plate, a slide plate, a transparent simulation sleeve, a fixing cylinder sleeve, a simulation hollow drill stem, a drill stem rotation drive mechanism, a drilling fluid cycle control device and a data acquisition device. In-situ observation in the sand cleaning process of drilling is tested by integrating parameter such as eccentricity, hole drift angle, drilling fluids of different features, pressure, flow, flow speed, torque, different sands, sand addition, sand-cleaning eyeholes and drilling stem sleeve surface roughness, and great significance is brought to sand cleaning mechanism of the drilling process, abrasion of the sleeve, sand cleaning features of drilling fluids and the like; the tester is simple in structure, has a clear principle and is convenient to operate.

The invention relates to the field of well drilling of the petroleum industry and in particular to a hydrophobic modification polyacrylamide polymer as a supermolecule shearing strength improving agent and application in a water-based drilling fluid. Structure units forming the polymer are a structure unit of a formula (1) shown in the specification, a structure unit of a formula (2) shown in thespecification, a structure unit of a formula (3) shown in the specification and a structure unit of a formula (4) shown in the specification; and the number-average molecular weight of the polymer is1-6.5 million. The hydrophobic modification polyacrylamide polymer provided by the invention has a supermolecule-like structure, and a shearing strength improving agent with properties of shearing resistance and easily recovered structures can be provided by virtue of electrostatic force, hydrogen bonds, hydrophobic effects and the like of supermolecules.

The invention discloses a pressure control device for continuous circulating drilling. The pressure control device for continuous circulating drilling comprises a body, a through hole for allowing a drill rod to penetrate through is formed in the middle of the body, four rams are further installed in the through hole of the body, each ram is formed by splicing two half rams of the symmetrical structure, and each half ram is driven by a hydraulic cylinder. The four rams comprise the blind ram, the slip ram, the bearing ram and the pipe ram sequentially from top to bottom, wherein the blind ram, the bearing ram and the pipe ram are arranged in parallel, and the slip ram and the bearing ram are crossed by 90 degrees. The pressure control device can reduce pressure fluctuation of a wellhead when single-joint unit or three-joint unit connection and disconnection circulation stops or starts, keep the pressure of the wellhead stable, and can ensure that the formed well wall does not collapse to the greatest extent, drilling accidents are greatly reduced, and the risks of circulation loss, stratum cracking, well kick, pressure differential sticking, and jamming of a drill bit or bottom drill combination are greatly reduced.

Disclosed is a core drill output torque upper control limit drill rod. The core drill output torque upper control limit drill rod comprises a core pipe, a joint is arranged on the upper portion of the core pipe, a rotating sleeve sleeves the middle of the core pipe, a torque transmission bar is disposed between the rotating sleeve and the core pipe, and a ring of circular arc groove which is used for disconnection when the core drill output torque is larger than the maximum bearing torque of a downhole drill rod is designed in the middle of the torque transmission bar. By means of the circular arc groove in the middle of the torque transmission bar, a torque transmission relation between a core drill active drill rod and the downhole drill rod is disconnected when the core drill output torque is larger than the maximum bearing torque of the downhole drill rod, the core drill active drill rod continues to rotate and the downhole drill rod stops rotating, and thereby, bearing torque overload protection of the downhole drill rod can be achieved. The core drill output torque upper control limit drill rod has the advantages that the weight is small, the structure is simple, assembly and disassembly are convenient, downhole drill rod breaking accidents caused by excessively large drill output torque can be effectively avoided, the construction costs are lowered, and the core drill output torque upper control limit drill rod is applicable to deep hole geological exploration engineering.

The invention provides a method which utilizes a foam pre-dialyzing liquid device to improve the efficiency of foam drilling and belongs to the technical field of petroleum drilling. The concrete method is as follows: 1) nitrogen or air flow passes a porous medium sand core to mix with a foam base solution containing the active ingredient of interfacial active agent to produce continuous foam and get the fresh foam with the dryness of 45-60%; 2) the fresh foam with the dryness of 45-60% is sent into the pre-dialyzing liquid device, and the pre-dialyzing liquid device reduces the motion speed of the foam, and a large amount of mobile water carried in the foam is separated out by the gravity action and the pre-dialyzing liquid dry foam with the dryness of 75-95% is acquired; 3) the dry foam of the pre-dialyzing liquid is sent into a well bore to take out the water and the solid matters such as drill chips in the well bore. The invention can rapidly take out the strata water in the well, and the bottom of the well has no residual liquid, which can avoid the occurrence of drilling accidents.

The invention discloses an offshore casing surge compensation dual-drive three-layer casing drilling and coring device. The device comprises a drilling ship with a dynamic positioning system, a drilling tool system, an outer casing drilling system, an inner sleeve and drill rod drilling system and a mud circulating system; the drilling tool system comprises an outer sleeve, an inner sleeve, a drilling rod and a surge compensator; the outer casing drilling system comprises a traveling block mounted on the tower, a top drive mounted on the traveling block and a hydraulic elevator mounted on the top drive; the inner sleeve and drill rod drilling system comprises a vertical shaft type drilling machine and a winch; and the mud circulating system comprises a mud recycling pool, a mud filter, a mud pool and a mud pump which are installed on a deck. The drilling and coring device has the advantages of being high in drilling efficiency, high in coring rate, simple in equipment, high in reliability, low in cost and the like, and is not only suitable for general sedimentary rock stratum shallow drilling, but also suitable for stratums difficult to core, such as reef limestone stratums and sandy soil stratums.

The invention relates to the technical field of protection devices, and provides a power-failure protection device used for a drilling rig and a power-failure protection type drilling rig drum device.The power-failure protection device used for the drilling rig comprises a normally-open pneumatic control valve, a source gas inlet pipeline, an electromagnetic valve, a high and low speed gas guidevalve, a pneumohydraulic reversing valve, a master clutch gas guide valve, a control gas pipeline, a low-speed pneumatic reversing valve and a high-speed pneumatic reversing valve, wherein an gas outlet of the source gas inlet pipeline is communicated with a first normally-open interface of the normally-open pneumatic control valve through the control gas pipeline, and the electromagnetic valve isarranged in the control gas pipeline. The power-failure protection type drilling rig drum device comprises the power-failure protection device used for the drilling rig, a main drum, a hydraulic pipeline, a third master gas guide pipeline, a fourth master gas guide pipeline and a central shaft. The power-failure protection device is reasonable and simple in structure and convenient to use, by arranging the electromagnetic valve in the control gas pipeline, the drilling rig can be quickly comprehensively braked in an unexpected power failure, drill string not-well braked and free-fall accidents are avoided, the operation safety of the drilling rig is improved, and the power-failure protection device has the advantages of being safe, simple and reliable, and saving labor.

The invention provides a method for measuring the sand content of drilling fluid based on an artificial neural network. The method comprises the following steps: collecting performance parameters of a plurality of groups of mud with different sand contents; screening and analyzing performance parameters of the mud, calculating to obtain Heschell-Balkel three parameters according to the screened and analyzed performance parameters, and taking the screened and analyzed performance parameters and the Heschell-Balkel three parameters as input parameters; performing data expansion and division on the input parameters to obtain a training set, a verification set and a test set; constructing an ANN neural network model, and iteratively training and verifying the ANN neural network model by using the training set and the verification set; and evaluating the prediction effect of the trained neural network model by using the test set, and measuring the sand content of the drilling fluid by using the neural network model meeting the preset prediction effect. A small amount of limited existing data is analyzed, processed and expanded to obtain an accurate prediction model.

The invention provides a nuclear magnetic resonance logging system, which comprises a mud pipe, a controller, a controllable pump, a spectrometer, a wireless transmitting and receiving module, a detection pipe and a detection device, wherein the mud pipe is used for extracting downhole drilling fluid; one end of the mud pipe extends to the downhole and the other end is connected with a drilling fluid pool; one end of the detection pipe is communicated with the mud pipe and the other end is communicated with the outlet of the controllable pump; the inlet of the controllable pump is communicated with the mud pipe; the detection pipe is sleeved with the detection device; the detection device is connected with the spectrometer; and the spectrometer and the controllable pump communicate with the controller via the wireless transmitting and receiving module. According to the nuclear magnetic resonance logging system, real-time drilling fluid detection and remote drilling fluid detection control are realized, defects that wiring of wired communication is complicated, fault points are hard to find when fault happens and the like are overcome, and adaptability and stability of the nuclear magnetic resonance logging system are enhanced.